Partition wall member

The present invention relates to a partition wall member (bulk head) that reinforces a skeleton member (frame) such as a side member, a cross member, a side sill, and a pillar of an automobile.

The skeleton member (frame) of an automobile, such as a side member, a cross member, a side sill, and a pillar of an automobile, includes a main material having a channel cross section composed of substantially flat both side surfaces and a bottom surface and an open surface facing the bottom surface. It is configured as a hollow member by assembling with an auxiliary material that closes the open surface of the main material. Here, the "side surface" and "bottom surface" of the main material are names when the open surface corresponds to the upper surface for convenience of explanation. For example, when the "bottom surface" faces sideways, the "bottom surface" is used. Opposing open surfaces also face sideways, with one "side" on the top and the other on the "bottom".

The main material, which is the main component of the skeleton member, is required to have high structural strength and rigidity on the one hand, but is required to be lightweight and inexpensive as a member for automobiles on the other hand. Due to the latter requirement, a thin metal plate (steel plate) is usually used as the main material, but for this reason, the cross-sectional shape of the main material is deformed by external forces such as tension, compression, bending, and twisting, resulting in structural strength and rigidity. May decrease. For this reason, the required number of bulkhead members (bulk heads) are attached to the required locations in the main material to reinforce them, and by suppressing or preventing the decrease in structural strength and rigidity, the high strength and weight reduction required for the skeleton member are reduced. Are compatible.

In the conventional partition wall member, for example, as seen in Patent Document 1, a joint plate protruding beyond each of the three sides of the partition wall plate having an outer shape substantially equal to the cross-sectional shape of the main material is folded into the sides of the partition wall plate. It is a structure in which curved edges are formed and each is bent. This partition member is fixed to the main material by welding each joint plate to both side surfaces and the bottom surface of the main material while partitioning the main material in the extending direction by the partition plate.

The partition wall member is required to have high structural strength and rigidity capable of reinforcing the skeleton member. This is a question of how to suppress or prevent buckling, bending or deformation of the bulkhead plate or the bent edge. In this case, for example, the bending circumference in which the vicinity of the bent edge portion of the above three joint plates and the auxiliary flange plate formed by forming the bent edge portion on the side of the partition plate without the joint plate and bent are connected to each other. It is conceivable to provide a surface. That is, the bent peripheral surface surrounding the partition plate increases the cross-sectional coefficient of the partition plate to prevent buckling, bending or deformation, and enhances the structural strength and rigidity of the partition member.

As described above, the partition member of Patent Document 2 includes three joining plates to be joined to each side surface and the bottom surface of the main material, and one joining plate protruding beyond the remaining side of the partition plate. It adopts a structure that is bent in the opposite direction to the joint plate of. The joint plate bent in the opposite direction is subjected to polymerization welding by bringing both ends into contact with flanges provided across the open surface of the main material. This partition member has a structure as a partition member by suppressing or preventing buckling, bending or deformation of the partition plate by increasing the cross-sectional coefficient of the partition plate near the open surface of the main material by means of a joint plate that is folded back alternately. Increases strength and rigidity.

<patcit num="1"><text>Japanese Unexamined Patent Publication No. 2004-306777</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 11-078978</text></patcit>

<p> The partition wall member is required to have high structural strength and rigidity on the one hand because it has a purpose of reinforcing the skeleton member, but on the other hand, it is required to be lightweight and inexpensive as a member for an automobile. In this respect, the partition wall member of Patent Document 2 is provided with an additional joint plate to be polymerized and welded to the flange of the main material, and the joint plate is larger than the joint plate to be joined to the side surface or the bottom surface of the main material. In addition to increasing the weight, there is a problem that the cost is naturally high. Since a large number of partition members are used, it is not preferable to increase the weight or cost of a single unit.</p><p> Compared to the partition member of Patent Document 2, the partition member provided with a bent peripheral surface surrounding the partition plate satisfies high structural strength and rigidity and weight reduction due to a simple structure. However, the feed portion (the portion provided with a hole for fitting the feed protrusion for intermittently feeding the plate material, etc., the carrier) generated when the bent peripheral surface is formed by press working and the partition wall member are the original plate or the partition wall member. Since the position shifts in the direction orthogonal to the feed direction, an extension portion (pantograph) that is not reflected in the product is required as a part that absorbs the position shift (see Fig. 7 below).</p><p> For this reason, since a wide range including the above-mentioned extension portion is treated as scrap material, there is a problem that a wasteful portion is inevitably increased in the material. Further, the extension portion is provided on the portion of the bent peripheral surface provided on the side of the partition plate without the joint plate, but the peripheral portion of the mold corresponding to the bent peripheral surface on which the extension portion is provided becomes thin, and this thin portion Since the partition wall member and the feed portion are separated by using the blade as one of the cutting blades, there is a risk that the mold may be partially damaged during the separation (see FIG. 8 below). Therefore, in order to develop a partition member having a structure or structure that satisfies the required structural strength and rigidity, can be manufactured as lightly and inexpensively as possible, and can reduce the waste of materials, a study was conducted.</p>

<p>As a result of the examination, the partition wall member to be installed in the main material of the skeleton member whose main component is the main material of the channel cross section composed of the substantially flat both side surfaces and the bottom surface and the open surface facing the bottom surface. In the above, two joint plates projecting beyond each of a pair of opposing sides of a partition plate having an outer shape substantially equal to the cross-sectional shape of the main material are bent by forming a bent edge portion on the side of the partition plate. And<u style="single">In the vicinity of the open edge, which is the side of the partition plate without a joint plate,</u>Indent each bent edge of the joint plate<u style="single">Convex in the bending direction of the joint plate</u>It is a partition member in which one or more beads are formed across the partition plate in a cross-sectional shape. The two joint plates are inscribed in the side surface of the main material and fixed by welding.</p><p> The partition wall member of the present invention buckles the partition wall plate and the bent edge portion by forming one or a plurality of beads that cross the partition wall plate in a cross-sectional shape in which each bent edge portion of the joint plate is recessed. , Suppress or prevent bending or deformation. First, the bead increases the cross-sectional coefficient of the partition plate to increase the rigidity of the partition plate itself, and suppresses or prevents buckling, bending or deformation of the partition plate. In addition, the bead dents the bent edge of each joint plate at both ends to increase the cross-sectional coefficient of the bent edge to increase the rigidity of the partition plate itself, and buckling, bending or deforming the bent edge. Suppressed or prevented. Further, the bead also acts as a tension member erected between the side surfaces of the main material and directly reinforces the main material. The cross-sectional shape of such a bead is free, but a semi-circular cross section that can be easily formed by press working is preferable.</p><p>Further, the conventional partition wall member requires an extension portion in order to absorb the physical displacement of the partition wall member with respect to the feed portion during press working, but the partition wall member of the present invention is used.<u style="single">, Near the open edge, which is the side of the partition plate without the joint plate,</u>Because the ductility of the material can be used to form beads<u style="single">For example, even when a bulging portion protruding in the opposite direction to the joint plate is formed in a portion other than the bead.</u>It is not necessary to absorb the physical displacement of the partition member with respect to the feed portion, a small connection portion connected to the feed portion is sufficient, and the extension portion can be omitted. In addition, since the bead can be formed as a ridge on the inside of the partition plate, not on the side of the partition plate, in the same direction as the bending direction of the joint plate, a part of the mold may be thickened but thinned. Absent. In particular, in the conventional mold, the cutting edge portion is thin, but in the mold forming the partition wall member of the present invention, it is not necessary to thin the cutting edge portion, and the strength of the mold can be sufficiently ensured.</p><p> In particular, in order for the bead to better exert its function as a tension member erected between the side surfaces of the main material, it is desirable that the bead has a linear shape orthogonal to both joint plates. Further, since the most required improvement in rigidity is the edge portion of the side where the joint plate is not provided = the open edge portion, the bead is formed in the vicinity of the open edge portion which is the side of the partition plate where the joint plate is not provided. Good. That is, if there is a pair of open edges corresponding to the bottom surface and the open surface of the main material, at least one bead is formed in the vicinity of each open edge, for a total of two beads. Further, as will be described later, if there is an open edge portion only corresponding to the open surface of the main material, at least one bead is formed in the vicinity of the open edge portion.</p><p> The beads in the partition member of the present invention increase the rigidity of the partition plate and the bent edge portion, and further directly reinforce the main material. Therefore, only two pairs of joint plates corresponding to the side surfaces of the main material need to be provided. However, the joint plate has a function of suppressing or preventing bending of the partition plate by fixing the position of the partition plate with respect to the main material and restraining the mutual positional relationship between the main material and the partition plate. From now on, in addition to the joining plate corresponding to the side surface of the main material, a joining plate corresponding to the bottom surface of the main material may be further provided.</p><p> When a joint plate corresponding to the bottom surface of the main material is provided, the joint plate is formed by forming three joint plates protruding beyond each of the three sides of the partition plate and forming a bent edge on the side of the partition plate. It is preferable that each of the joint plates is bent and the vicinity of the bent edges of all the joint plates is connected to each other to provide a bent peripheral surface. The conventional partition wall member is a closed annular bent peripheral surface surrounding the partition wall plate, but the partition wall member of the present invention forms a joint plate in order to separately form a bead that increases the rigidity of the partition wall plate at the open edge portion3. Only one side may have an open ring-shaped bent peripheral surface. In this case, the bead is preferably formed in the vicinity of the open edge corresponding to the open surface of the main material.</p>

<p> The partition wall member of the present invention has an effect that it can be manufactured lightly and inexpensively by reducing the waste of materials while satisfying the required structural strength and rigidity. First, the satisfaction of structural strength and rigidity is an effect directly brought about by the bead that crosses the partition plate in a cross-sectional shape in which each bent edge of the joint plate is recessed. The bead not only enhances the structural strength and rigidity of the partition plate and the bent edge, but also directly reinforces the main material of the skeleton member. The fact that it can be manufactured lightweight and inexpensively and that the waste of materials can be reduced is an effect that the joining plate can be limited to at least two sheets to be joined to the side surface of the main material, and the extension portion can be omitted in the manufacturing. Even if a joining plate to be joined to the bottom surface of the main material is added, it is not necessary to provide the bending peripheral surface on one of the sides of the partition plate, so that the manufacturing can be made lightweight and inexpensively. As described above, the present invention has an effect of satisfying all the requirements for the partition wall member.</p>

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of a partition member 1 to which the present invention is applied, FIG. 2 is a partially broken perspective view showing an example of a skeleton member 2 in which the partition member 1 is attached to the inside of the main material 21, and FIG. A perspective view showing another example of the partition wall member 3 to which the present invention is applied, FIG. 4 is a perspective view showing another example of the partition wall member 4 to which the present invention is applied, and FIG. 5 shows a manufacturing procedure of the partition wall member 1 of the present invention. A perspective view showing the process layout shown, FIG. 6 is a cross-sectional view of the partition member 1 and the lower mold 52 showing the stage of separating the partition member 1 from the feed portion (carrier) 51, and FIG. 7 is the manufacture of the conventional partition member 6. FIG. 5 is a perspective view corresponding to FIG. 5 showing the process layout showing the procedure, and FIG. 8 is a sectional view corresponding to FIG. 6 of the partition member 6 and the lower mold 72 showing the stage of separating the partition member 6 from the extension portion (pantograph) 73. is there. For convenience of explanation, in each process layout of FIGS. 5 and 7, only the main process is shown and the others are omitted. For example, (II) the press process represents a plurality of press processes collectively.

As seen in FIG. 1, the partition member 1 of this example is composed of three joining plates 12, 13, 13 bent from three sides of the partition plate 11 having a substantially rectangular shape in a plan view, and a pair of opposing joints. One straight bead 14 connecting the plates 13 and 13 is formed. The joint plates 12, 13, 13 and beads 14 with respect to the partition plate 11 are integrally formed by press molding from an original plate (steel plate) having a thickness of 1.2 mm to 1.6 mm. As seen in FIG. 2, the partition wall member 1 is spot-welded by inscribed the joint plates 12, 13 and 13 on both side surfaces 211 and 211 and the bottom surface of the main material 21, and is fixed to the inside of the main material 21. .. The main material 21 of this example has an open surface 213 facing the bottom surface 212, and after fixing the partition wall member 1, the auxiliary material 22 is fixed over the flanges 214 and 214 sandwiching the open surface 213 to form the open surface 213. By closing it, the skeleton member 2 is formed.

The partition plate 11 has an outer shape substantially equal to the cross-sectional shape of the main member 21 of the channel cross section composed of substantially flat both side surfaces 211 and 211 and the bottom surface 212 and the open surface 213 facing the bottom surface 212, that is, a rectangular shape in a plan view. It is a face material. The partition plate 11 of this example forms a bulging portion 15 protruding in the opposite direction to the joining plates 12, 13, 13 near the substantially center other than the bead 14, and penetrates the bottom plane 151 of the bulging portion 15. It forms a hole 152. The bulging portion 15 is a bulging portion having a trapezoidal cross section formed in an area of 50% to 60% of the partition plate 11 at a depth of about 3 mm to 5 mm, and functions to increase the rigidity of the partition plate 11. Have. Further, the through hole 152 is formed by cutting away the peripheral edge of the bottom plane 151 of the bulging portion 15, which contributes to weight reduction of the partition member 1 and of the main material 21 to which the partition plate 11 is attached. It has the function of spreading the paint that is poured into the interior to every corner and discharging the surplus.

There are three joining plates 12, 13 and 13, which project from each of the three sides of the partition plate 11 corresponding to the side surfaces 211 and 211 of the main material 21 and the bottom surface 212, and the side of the partition plate 11 has an arcuate curved edge. The portions 121, 131 and 131 are formed and bent respectively. The radius of curvature of the bent edges 121,131 is free, but it is desirable that the radius of curvature of the bent edges 121,131 is as small as possible from the viewpoint of suppressing or preventing buckling, bending or deformation of the bent edges 121,131. The range should be 3mm to 4mm. In this example, the bent edges 121,131,131 of all the joint plates 12,13,13 are connected to each other to form the bent peripheral surface 16. The bent peripheral surface 16 is an open ring formed in the range of three sides forming the joint plates 12, 13 and 13 to increase the rigidity of the partition plate 11.

The bead 14 is a semicircular shape formed on each of the pair of bent edges 131 and 131 of the pair of joining plates 13 and 13 facing each other, and in this example, the pair of joining plates 13 and 13 inscribed and fixed to both side surfaces 211 and 211 of the main material 21. It is a straight line connecting the recesses 141 (see Fig. 6) in the cross section. The cross-sectional shape and size of the bead 14 are free, but when considering molding by pressing, a semi-circular cross section having a diameter of about 6 mm to 10 mm is preferable. The bead 14 first directly suppresses or prevents buckling, bending, or deformation of the bent edge portions 131, 131 by denting the bent edge portions 131, 131. Then, in the case of this example, the bead 14 is formed along the vicinity of the open edge portion 111, which is the side on which the joint plate is not provided, at right angles to each of the opposing joint plates 13, 13 to generate from the open edge portion 111. It suppresses or prevents buckling, bending or deformation of the partition plate 11 which may be afraid.

Further, the bead 14 of this example is formed orthogonal to each of the pair of joint plates 13 and 13 facing each other, and the partition wall member 1 is fixed to the inside of the main material 21 and between the side surfaces 211 and 211 of the main material 21. It works as a tension member erected on the main material 21 and directly reinforces the main material 21. In this case, if the hem of the bead 14 is formed so as to be the open edge portion 111, the rigidity or structural strength of the bead 14 itself is lowered. Therefore, it is preferable to form the bead 14 inside the open edge portion 111, that is, in the partition plate 11. In this case, the distance between the hem of the bead 14 and the open edge 111 is preferably at least 3 mm or more. Further, in the case of this example, since the bead 14 is formed along the open edge portion 111 of the partition wall member 1, the upper edges of the side surfaces 211 and 211 of the main material 21 having low structural strength can be reinforced. Reinforcement of the partition wall member 1 and reinforcement of the main material 21 by such beads 14 are structural effects in the present invention.

Here, for example, as shown in FIG. 3, the joining plates 33, 33 are only a pair facing each other, and if the partition plate 31 has two upper and lower open edges 311, 312, the bent edges of the joining plates 33, 33 are bent. It is also possible to use a partition member 3 in which 331 and 331 are recessed and one bead 34 and 32 is formed along both open edges 311, 312, respectively. In this case, since the partition plate 31 is sandwiched between the upper and lower beads 34 and 32 to form a recess 35 having a through hole 352, it can have a necessary and sufficient structural strength. Further, as seen in FIG. 4, the recess 45 having the through hole 452 is formed close to the open edge portion 412 below the partition plate 41, and the bent edge portions 431,431 of the joint plates 43,43 are recessed. , The partition member 4 may have one bead 44 formed along the upper open edge 411.

The partition member 1 of the present invention is manufactured according to the following procedure. First, in the (I) punching step, as shown in FIG. 5, by punching the original plate (not shown in FIG. 5) to be sent out into a predetermined shape, connecting portions 53 are formed on both sides of the feeding portion (carrier) 51. The expanded partition member 17 that is sandwiched and connected is formed (for convenience of explanation, the expanded partition member on the front side in FIG. 5 is not shown). Conventionally, as seen in FIG. 7, a large extension portion (pantograph) 73 that absorbs the displacement of the partition wall member 6 with respect to the feed portion 71 has been required. On the other hand, in the production of the partition wall member 1 of the present invention, an extension portion is not required, a narrow original plate is sufficient, and the gap between the expanded partition wall member 17 and the feed portion 51 is small, so that the scrap material is used. It turns out that it will decrease.

As seen in FIGS. 5 and 6, the developed partition member 17 is pressed by the (II) pressing step according to, for example, the lower die 52 (the upper die in FIG. 6 shows only the cutting edge 523), and the partition plate 11 is pressed. A bulging portion 15, an open annular bent peripheral surface 16, joint plates 12, 13, 13 and a bead 14 are formed, and the partition member 18 is almost like a product. At this stage, the partition member 18 almost like a product is connected to the feed portion 51 via the connection portion 53. Here, in the present invention, since the bead 14 is formed inside the open edge portion 111, the open edge portion 111 to which the connecting portion 53 is connected is on the same plane as the feed portion 51, and is substantially a product-like partition wall member. There is almost no misalignment between 18 and the feed section 51.

Conventionally, by the same (II) pressing process, for example, the lower die 72 (the upper die in FIG. 8 shows only the cutting blade 723) is pressed by pressing, and the concave wall plate 61 has a recess 65 and an annular bent peripheral surface 66. , And the joint plates 62,63,63 are formed to obtain a bulkhead member 68 almost like a product. In this almost product-like partition wall member 68, an extension portion 73 is connected to a part of a closed annular bent peripheral surface 66 instead of a bead, and as shown in FIG. 8, a fold in which a joint plate is not provided by press pressing. By deforming the extension portion 73 lifted at the portion of the curved peripheral surface 66, the displacement with respect to the feed portion 71 is prevented. This extension portion 73 is formed at the same time as the punching of the developed partition wall member in the preceding (I) punching step, and the material itself is the same as that of the partition wall plate 61, and is not deformed due to the properties of the material. For this reason, since the extension portion 73 adopts a closed ring pantograph structure to enable structural deformation, an extension portion 73 that is not reflected in the product is required, and a wide range including the extension portion 73 can be used as scrap material. It caused a problem that the material had a lot of wasted parts to be handled.

As seen in FIG. 5, the partition member 18 almost like a product after molding each part is separated from the feed portion 51 by the (III) separation step, and the remaining portion of the connection portion 53 is removed, for example, FIG. It becomes the partition member 1 of the product found in. The feed portion 51 is divided in the feed direction to form a small end material 54 for the convenience of separating the partition wall member 1, but the end material 54 of this feed portion is clearly smaller than the conventional end material 74. (In Fig. 6 and Fig. 8, (III) Separation step is compared and controlled).

(III) In the separation step, the partition member 1 and the connecting portion 53 are separated from the partition member 1 by shearing the cutting edge 521 and the upper die 523 with one end of the lower die 52 as the cutting edge 521. This is carried out in a manner in which the portion 53 is cut off. This also applies when the conventional partition wall member 6 and the extension portion 73 are separated. In this case, conventionally, as seen in FIG. 8, a thin cutting edge 721 is projected from the lower die body 722 along the portion of the bent peripheral surface 66 to which the extension portion 73 (see FIG. 7) is connected, and this cutting edge is formed. The 721 and the upper cutting edge 723 had to be crossed. On the other hand, in the present invention, as shown in FIG. 6, the cutting blade 521 that separates the partition wall member 1 and the connecting portion 53 can be provided flush with the lower mold main body 522 without protruding. 52 partial defects can be prevented. As described above, it is a manufacturing effect in the present invention that the amount of scraps can be reduced and the lower mold (mold) can be prevented from being partially damaged.

In addition, the present invention also has an advantage due to the difference in the unevenness of the bead 14 formed on the partition plate 11, so it should be added. For example, unlike the present invention, it is conceivable to form a bead formed of a concave groove in the direction opposite to the bending direction of the joint plate on the partition plate. In this case, if the bead is to be formed at the same height from the start end to the end so as to reach the bent edge 131, the steel plate as the material is partially stretched greatly and the wall thickness becomes extremely small. There is a risk of cracking or cracking. Further, if the shape is not unreasonable in molding, the height of the bead becomes small at the start end and the end without reaching the bent edge portion 131, and the bead does not act as a tension member with respect to both side surfaces of the main material. Further, if the shape is made reasonable in molding, the height of the bead becomes small at both ends, and the bead does not act as a tension member for both side surfaces of the main material. In the present invention, by forming a bead 14 formed of protrusions in the same direction as the bending direction of the joining plates 12, 13, 13 on the partition plate 11, the bent edges 131, 131 do not cause the above-mentioned problems. And the partition wall plate 11 are reinforced, respectively, and the partition wall member 1 is provided, which is effective as a reinforcing member for the main material 21 by acting as a tension member for both side surfaces 211 and 211 of the main material 21.

<figref num="1">It is a perspective view which showed an example of the partition wall member to which this invention was applied.</figref><figref num="2">It is a partial fracture perspective view which showed an example of the skeleton member which attached the partition wall member inside the main material.</figref><figref num="3">It is a perspective view which showed another example of the partition wall member to which this invention was applied.</figref><figref num="4">It is a perspective view which showed the further example of the partition wall member to which this invention was applied.</figref><figref num="5">It is a perspective view which shows the process layout which showed the manufacturing procedure of the partition wall member of this invention.</figref><figref num="6">It is sectional drawing of the bulkhead member and the lower mold which showed the stage of separating a bulkhead member from a feed part (carrier).</figref><figref num="7">FIG. 5 is a perspective view corresponding to FIG. 5 showing a process layout showing a conventional partition wall member manufacturing procedure.</figref><figref num="8">FIG. 6 is a cross-sectional view of the partition wall member and the lower die corresponding to FIG. 6 showing the stage of separating the partition wall member from the extension portion (pantograph).</figref>

Code description

1 Bulkhead member 11 bulkhead 111 Open edge 12 Joint plate that hits the bottom of the main material 121 Folded edge 13 Joint plate that hits the side of the main material 131 Folded edge 14 bead 141 dent 15 bulge 151 Bottom plane 152 Through hole 16 Open ring Quzhou 17 Expanded bulkhead member 18 Almost product-like bulkhead members 2 Skeleton member 21 Main material 211 side 212 bottom 213 Open surface 214 flange 22 Secondary material 3 Another example of partition wall member 4 Another example partition member 51 Feeder (carrier) 52 Lower mold 53 Connection 54 Feed end material 6 Conventional bulkhead member 71 Feeder (carrier) 73 Extension (pantograph) 74 Feed end material