Carrying device

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a transport device for assembling parts while mounting a work on a pallet and circulating it along a transport path forming a closed loop.

【0002】

[Conventional technology]

A transport device for assembling parts while circulating a pallet on which a work is placed along a transport path forming a closed loop is conventionally known (see Japanese Patent Publication No. 4-57555). In the above-mentioned conventional transfer device, a pallet-shaped trolley on which a work can be placed is circulated on a rail installed along a quadrangular transfer path, and parts are assembled to the work mounted on the trolley in the meantime. It has become like.

【0003】

[Problems to be Solved by the Invention]

However, the above-mentioned conventional one has a problem that it is difficult to improve work efficiency because it is necessary to sequentially supply parts to be assembled to the work from the outside to the bogie. In addition, in order to assemble parts to the work, work air is required to raise and lower the work to a height that is easy to work with, and to drive an air tool such as an impact wrench. When trying to supply from the outside of the moving trolley, there was a problem that it became troublesome to handle and attach / detach the air hose.

【0004】

The present invention has been made in view of the above circumstances. In a transfer device for assembling parts while placing the work on a pallet and circulating it along a transfer path forming a closed loop, assembling the parts to the work. The purpose is to enable the work to be done efficiently.

【0005】

[Means for solving problems]

In order to achieve the above object, the invention described in claim 1 is a work carried into a pallet at a carry-in station while circulating the pallet along a transport path having a carry-in station and a carry-out station and forming a closed loop. Is a conveyor for an operator to assemble parts to the work on the pallet until the conveyor is unloaded from the pallet at the unloading station, and the conveyor paths are arranged in parallel with each other. The 1st and 2nd conveyors, the 1st traverser extending from the end of the 1st conveyor to the start of the 2nd conveyor and passing the pallets from the 1st conveyor to the 2nd conveyor, and the 1st conveyor from the end of the 2nd conveyor. It is configured in a rectangular shape from the second traverser that extends toward the start end and delivers the pallets from the second conveyor to the first conveyor, and each of the conveyors can arrange a plurality of pallets in the traveling direction without any gaps. The pallets can be continuously driven at low speed, and the pallets are provided with a component support portion for supporting the components and an air tank for accumulating work air for assembling the components to the work, and air is provided in the air tank. The air supply means for filling the first traverser is provided at the end of the first traverser.

【0006】

According to the above configuration, since the pallet is provided with a component support portion for supporting the components to be assembled on the work, it is not necessary to sequentially supply the components to the pallet moving along the transport path, and the workability is improved. Moreover, since parts can be assembled with the air accumulated in the air tank provided on the pallet without sequentially supplying air to the pallet moving along the transport path from the outside, the handling of the air hose is simplified. Further, while the pallet circulates in the transport path, especially when the pallet is at the end of the first traverser, air can be supplied to the air tank from the air supply means provided at the end of the traverser, so that the air to the air tank can be supplied. Can be easily supplied.

【0007】

The invention described in claim 2 is characterized in that, in addition to the configuration of claim 1, the work supported by the work support jig provided on the pallet is moved up and down by an air cylinder connected to the air tank. To do.

【0008】

According to the above configuration, since the work supported by the work support jig is moved up and down by the air cylinder, the work can be supported at a position suitable for the work and the parts can be assembled efficiently. Moreover, since the air cylinder is driven by the air tank provided on the pallet without sequentially supplying air to the pallet moving in the transport path from the outside, the routing of the air hose to the air cylinder is simplified.

【0009】

The invention described in claim 3 is characterized in that, in addition to the configuration of claim 1, an air tool for assembling parts to the work is connected to the air tank.

【0010】

According to the above configuration, the air tool is driven by the air tank provided on the pallet without sequentially supplying air to the pallet moving in the transport path from the outside, so that the handling of the air hose with respect to the air tool is only simplified. Not only that, the operability of the air tool is also improved.

【0011】

Further, in the invention described in claim 4, in addition to the configuration according to any one of claims 1 to 3, an empty tray discharge station for discharging an empty component tray supported by the component support portion from the pallet is the first. The air supply means is provided at the end of the traverser, and the empty tray discharge station is provided.

【0012】

According to the above configuration, at the end of the first traverser, the empty component tray supported by the component support portion is removed and discharged to the empty tray discharge station, and at the same time, air is supplied from the air supply means to the air tank. ..

【0013】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described based on the examples of the present invention shown in the accompanying drawings.

【0014】

1 to 8 show a first embodiment of the present invention, FIG. 1 is a plan view of a sub-line for assembling an automobile door, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. 3 is a diagram. 1 3-3 arrow view, Fig. 4 is a 4-4 line cross section of Fig. 1, Fig. 5 is an enlarged view of 5 parts of Fig. 1, Fig. 6 is a 6-direction arrow view of Fig. 5, and Fig. 7 is a figure. The 7-direction arrow view of 5 and FIG. 8 are explanatory views of the action of the traverser.

【0015】

As shown in FIG. 1, the transport device of this embodiment is applied to a subline provided on the side of the main line for assembling an automobile, and the left and right rear portions as a workpiece removed from the vehicle body of the automobile flowing through the main line. Door D_L, D_RThis is for assembling parts by a worker who gets on the pallet P while circulating on the closed transport path L with the pallet P mounted on the pallet P. Left and right rear doors D for which parts have been assembled_L, D_RIs returned to the main line and reattached to the car body.

【0016】

The transfer path L of the transfer device is the first conveyor C arranged parallel to each other.₁And 2nd conveyor C₂And the first conveyor C₁2nd conveyor C from the end of₂1st Traverser T extending towards the beginning of₁And the second conveyor C₂1st conveyor C from the end of₁2nd Traversa T extending towards the beginning of₂It is composed of the first and second conveyors C as a whole.₁, C₂It has a long side along the transport direction of, and the 1st and 2nd traversers T₁, T₂It is formed in a rectangular shape having a short side along the transport direction of.

【0017】

1st conveyor C₁Carry-in station S on the side of₁And carry-out station S₂Are placed adjacent to each other. Carry-in station S₁Door D, which was transported from the main line by a dolly not shown in_L, D_RIs temporarily stored, and from there a pair of left and right doors D_L, D_RIs the transfer device B₁It is sequentially transferred onto each pallet P of the transport device. Carry-in station S₁Left and right pair of doors D_L, D_RThe pallet P that received the first conveyor C₁1st traverser T from the end of₁, 2nd conveyor C₂, 2nd Traversa T₂And 1st conveyor C₁Door D that circulates above and finishes assembling parts in the meantime_L, D_RIs the carry-out station S₂When it reaches, the transfer device B₂Is paid out from pallet P by. These doors D_L, D_RAre mounted on the trolley in predetermined numbers and returned to the main line.

【0018】

Next, the structure of the pallet P will be described with reference to FIGS. 5 to 7.

【0019】

The pallet P includes a substrate 11 formed in the shape of a square plate, and four wheels 12 ... Are provided on the lower surface thereof. 1st conveyor C₁And 2nd conveyor C₂Each has a pair of rails 13, 13, and the four wheels 12 ... Are guided on these rails 13, 13. Further, a pair of guide rollers 14 and 14 are provided in the vicinity of the two wheels 12 and 12 on the left and right sides of the pallet P, respectively, and these guide rollers 14 and 14 are along both side surfaces of one of the rails 13. By rolling, the wheels 12 ... are prevented from coming off the rails 13, 13.

【0020】

Two door support jigs 15 and 16 constituting the work support jig of the present invention are erected on the upper surface of the pallet P, and the air cylinder 15 is provided on one of the door support jigs 15.₁Support arm that goes up and down with 15₂Left door D_LIs supported in an upright position and is provided on the other door support jig 16 to provide an air cylinder 16₁Support arm 16 that goes up and down with₂Right door D_RIs supported in an upright position. Further, on the left and right sides of the pallet P, tray support bases 17 constituting the component support portion of the present invention are provided so as to project laterally, and the door D mounted on the pallet P is provided._L, D_RParts to be assembled to p₁~ p₅A multi-stage part tray 18 in which (wind glass, inner panel, small parts, etc.) is set in advance can be placed on the tray support 17.

【0021】

The pallet P is provided with an air tank 19 filled with air, and the air tank 19 to the air cylinder 15 are provided.₁,16₁The air that drives the and the parts p on the pallet P₁~ p₅The air that drives the air tool T such as an impact wrench for performing the assembly work is supplied. That is, the pipe L extending from the air tank 19₁Is the left door D_LDoor support jig 15 for air cylinder 15₁And the air tool connecting portion 39 provided in the vicinity thereof, and the air tool T is detachably connected to the air tool connecting portion 39 via the air hose 40. Similarly, the pipe L extending from the air tank 19₂Is the right door D_RDoor support jig 16 for air cylinder 16₁And the air tool connecting portion 41 provided in the vicinity thereof, and the air tool T is detachably connected to the air tool connecting portion 41 via the air hose 42.

【0022】

In addition, the tray support 17 of the pallet P has a joint 20 and a pipe L for supplying air to the air tank 19 from the outside.₃Is provided.

【0023】

Next, the first conveyor C is based on Fig. 1, Fig. 2 and Fig. 4.₁And 2nd conveyor C₂The structure of is explained. 1st and 2nd conveyor C₁, C₂Is arranged point-symmetrically with respect to the center of the conveyor and has substantially the same structure. Therefore, the first conveyor C is a typical example.₁The structure of is explained.

【0024】

1st conveyor C₁Is equipped with the pair of left and right rails 13, 13 that guide the four wheels 12 ... of the pallet P, and both ends of these rails 13, 13 are the first and second traversers T.₁, T₂Extends inside. 1st conveyor C₁A pair of left and right carry-in drive rollers 21,21 and a pair of left and right main drive rollers 22,22 are provided on the starting end side of the first conveyor C.₁A pair of left and right brake rollers 23,23 and a pair of left and right unloading drive rollers 24,24 are provided on the terminal side of the. Each of the rollers 21, 21; 22, 22; 23, 23; 24, 24 constituting the friction roller of the present invention is made of an elastic material such as rubber, and is provided by a motor 25 ... It is driven and abuts on the left and right long sides of the pallet P to generate driving force or braking force. In this way, the rollers 21,21; 22,22; 23,23; 24,24 made of elastic material are brought into contact with each other to move the pallet P ..., so that the first and second conveyors C₁, C₂Not only is the structure of the drive system extremely simple, but the pallet P ... can be driven smoothly by minimizing the generation of vibration and noise.

【0025】

1st conveyor C₁Multiple pallets P ... are arranged on the top without any gaps, and the main drive rollers 22 and 22 are on the first conveyor C.₁By continuously driving one pallet P located at the beginning of the conveyor at a low speed, the first conveyor C₁Press the upper pallets P ... from behind to move them at the same time. The brake rollers 23, 23 are the first conveyor C of the plurality of pallets P moved by the main drive rollers 22, 22.₁By applying a braking force to one pallet P located at the end of the pallet P, the pallet P becomes the first traverser T.₁Prevent overruns on. The unloading drive rollers 24 and 24 are driven at a higher speed than the main drive rollers 22 and 22, and the first conveyor C₁One pallet P located at the end of is separated from the subsequent pallet P and the first traverser T₁It is driven when moving to the beginning of. The carry-in drive rollers 21, 21 are driven at a higher speed than the main drive rollers 22, 22, and the second traverser T₁One pallet P located at the end of the first conveyor C₁Move to the beginning of the first conveyor C₁It is driven when catching up with the pallet P at the end of the top.

【0026】

The second conveyor C₂At the beginning of the door D mounted on the pallet P_L, D_RParts to be assembled to p₁~ p₄Actual tray supply station S that supplies the parts tray 18 in which₃Is provided.

【0027】

Next, the first traverser T based on FIGS. 1, 3 and 4.₁And the second traverser T₂The structure of is explained. 1st and 2nd Traversa T₁, T₂Is arranged point-symmetrically with respect to the center of the transport device and has substantially the same structure. Therefore, the first traverser T is a typical example.₁The structure of is explained.

【0028】

1st Traversa T₁Is equipped with three roller conveyors 26,27,28 capable of supporting the lower surface of the pallet P, and these roller conveyors 26,27,28 are the first conveyor C.₁2nd conveyor C from the end side of₂Start side C₂Arranged in series towards. The roller conveyors 26, 27, and 28 can be raised and lowered synchronously by the cylinders 29 ..., and the height of the transport surface at the rising position is the height of the first and second conveyors C.₁, C₂It is higher than the lower surface of the upper pallet P, and the height of the transport surface at the lowering position is the height of the first and second conveyors C.₁, C₂It will be lower than the height of the lower surface of the upper pallet P.

【0029】

The rollers of the roller conveyors 26, 27, 28 are free rollers that do not have a drive source, and the movement of the pallet P is the first traverser T.₁This is done by a rodless cylinder 30 arranged along one side. The output member 31 that reciprocates along the rodless cylinder 30 can stand up and down freely, the standing output member 31 engages with one short side of the pallet P, and the fallen output member 31 interferes with the pallet P. Evacuate downward so that it is not in.

【0030】

1st conveyor C₁From 1st Traversa T₁1st traverser T to stop the pallet P that has moved to the beginning of₁At the beginning of the pallet P, two stoppers 32 and 32 that can come into contact with the short side on the front side in the traveling direction of the pallet P are provided. Also the 1st Traversa T₁1st traverser T to stop the pallet P that has moved from the beginning to the end of₁At the end of the pallet P, two stoppers 33, 33 that can come into contact with the long side on the front side in the traveling direction of the pallet P are provided. 1st Traversa T₁On one side, two guide rollers 34, 34 for guiding the short side on the right side in the traveling direction of the pallet P and one guide rail 35 are provided.

【0031】

Also the 1st Traversa T₁Termination and 2nd conveyor C₂A rodless cylinder 36 is provided between the start end and the output member 37 that reciprocates along the rodless cylinder 36, and does not interfere with the position where the output member 37 engages with the lower surface of the pallet P and the lower surface of the pallet P. You can stand and lie down between the positions.

【0032】

1st Traversa T₁At the end of, the empty tray discharge station S that discharges the empty component tray 18 from the pallet P.₄Is provided. Also empty tray discharge station S₄Is provided with an air supply means 38 connected to a joint 20 provided on the pallet P side to supply air.

【0033】

Next, the operation of the embodiment of the present invention having the above-described configuration will be described.

【0034】

1st conveyor C₁The empty pallet P at the beginning of the traveling direction of multiple pallets P ... that move at low speed on the loading station S₁Transfer device B to the door support jigs 15 and 16 of the empty pallet P when passing through₁Left and right pair of doors D_L, D_RIs reprinted. At this time, the first conveyor C₁A plurality of pallets P ... are connected to each other in close contact with each other, and a pallet P located at the end of the plurality of pallets P ... in the traveling direction.₁(That is, 1st conveyor C₁The second traverser T is behind the direction of travel of the pallet P) located at the beginning of the₂Palette P located at the end of is connected.

【0035】

Carry-in station S₁At door D_L, D_RWhen the transferred pallet P reaches the positions of the carry-out drive rollers 24 and 24 that rotate at high speed, it is separated from the subsequent pallet P ... and the first traverser T₁Move to the beginning. At this time, the first traverser T₁The three roller conveyors 26, 27, 28 are in the descending position, and the first conveyor C₁The roller conveyor 26 located between the two rails 13 and 13 and the pallet P do not interfere with each other. In addition, the first conveyor C is newly added.₁Carry-in station S₁The pallet P that has reached the limit is braked by contacting the brake rollers 23, 23 that generate braking force, and the pallet P is the first traverser T.₁Overrun is suppressed at the beginning of. First conveyor C mentioned above₁2nd conveyor C in parallel with the operation of₂The first pallet P in the direction of travel is separated from the subsequent pallet P ... and the second traverser T₂Move to the beginning of.

【0036】

Now, the first conveyor C₁1st traverser T from the end of₁When the pallet P that has moved to the start end of the pallet P comes into contact with the stoppers 32, 32 and stops, the cylinder 29 ... expands and the three roller conveyors 26, 27, 28 rise in synchronization, and the roller conveyor on the start end side. 26 lifts pallet P. Subsequently, when the output member 31 stands up and engages with one long side of the pallet P, the pallet P pushed by the output member 31 driven by the rodless cylinder 30 moves on the roller conveyors 26, 27, 28. Cylinder 1st Traverser T₁At the end of, it comes into contact with stoppers 33 and 33 and stops. At this time, since the roller conveyors 26, 27, 28 are in the ascending position, the pallet P is the first and second conveyors C.₁, C₂There is no risk of interfering with the rail 13 ...

【0037】

Palette P is the first traverser T₁When the end of the cylinder 29 ... is reached, the cylinder 29 ... contracts, the roller conveyors 26, 27, 28 descend, and the pallet P supported by the roller conveyor 28 becomes the second conveyor C.₂Will be reprinted on rails 13 and 13. In this way the 1st Traversa T₁When the pallet P moves from the beginning to the end of, the first traverser T is in parallel with this.₂Palette P moves from the beginning to the end of.

【0038】

Thus, the 1st and 2nd traversers T₁, T₂Roller conveyors 26, 27, 28 are moved up and down to make the 1st and 2nd conveyors C₁, C₂Since the pallet P ... is delivered to and from the pallet P ..., the pallet P ... is the first and second conveyors C.₁, C₂Prevent the pallet P ... from interfering with the 1st and 2nd conveyors C₁, C₂And the 1st and 2nd traverser T₁, T₂It can be transferred smoothly between. The central roller conveyor 27 does not necessarily have to move up and down, and may be fixed at the rising position.

【0039】

1st Traversa T₁Empty tray discharge station S at the end of₄The empty tray discharge station S is provided by removing the empty parts tray 18 supported by the tray support 17 of the pallet P by the automatic discharge conveyor 39.₄To discharge. At the same time, empty tray discharge station S₄The air supply means 38 provided in the above is connected to the joint 20 of the pallet P, and the air tank 19 is filled with air.

【0040】

Since the air tank 19 is provided on the pallet P in this way, it is possible to simplify the handling of the air hose as compared with the case where air is supplied from the outside of the pallet P, and the same air is used even if the pallet P moves. Since the tool T can be used continuously, the operability is improved. Further, since air can be supplied to the air tank 19 while the pallet P circulates in the transport path L, it is extremely easy to supply air to the air tank 19.

【0041】

Then, the first traverser T is carried by the carry-in drive rollers 21, 21.₁Pallet P at the end of is the second conveyor C₂Move to the beginning of the second conveyor C₂Connect to the pallet P at the end of the traveling direction of multiple pallets P ... that move at low speed. At this time, the rodless cylinder 36 operates and the output member 37 presses the pallet P to assist the actions of the carry-in drive rollers 21 and 21. In parallel with this, the second traverser T₂Pallet P at the end of the first conveyor C by the carry-in drive rollers 21, 21 and the rodless cylinder 36₁Move up and say 1st Conveyor C₁Connect to the pallet P at the end of the traveling direction of multiple pallets P ... that move at low speed.

【0042】

2nd Traversa T₂2nd conveyor C from the end of₂The pallet P that has moved to the beginning of the actual tray supply station S₃When passing through door D_L, D_RParts to be assembled to p₁~ p₅The parts tray 18 in which the above is set is placed on the tray support 17 of the pallet P by the automatic supply conveyor 40.

【0043】

Therefore, for the two workers who got into this pallet P, the pallet P is the first conveyor C.₁From the 2nd Traversa T₂2nd conveyor C₂Carrying out station S₂Parts p on parts tray 18 before moving to₁~ p₅The door D_L, D_RComplete the work of assembling to. During that time, the air that operates the air tool T such as an impact wrench is supplied from the air tank 19 provided on the pallet P, and the door D_L, D_RAir cylinder 15 that raises and lowers to a height suitable for work₁,16₁The air for operating the air tank 19 is also supplied from the air tank 19. And pallet P is the first conveyor C₁Discharge station S₂When you reach, the assembled door D_L, D_RFrom pallet P to discharge station S₂And finish the process of one cycle.

【0044】

Door D_L, D_RParts to be assembled to p₁~ p₅By mounting the parts tray 18 in which the parts are set on the pallet P in advance, it is not necessary to sequentially supply parts to the moving pallet P, and workability is greatly improved.

【0045】

As described above, the first conveyor C₁And 2nd conveyor C₂By driving the rearmost pallet P with the main drive rollers 22 and 22, it is possible to collectively drive a plurality of pallets P ... in contact with each other in front of the pallet P. Therefore, the first conveyor C₁And 2nd conveyor C₂If it is necessary to extend the length of the rail 13 ..., only the length of the rail 13 ... needs to be extended, the main drive rollers 22,22 and other rollers 21,21; 23,23; 24,24. Since it is not necessary to make any changes to the transport path L, it is extremely easy to modify the length of the transport path L.

【0046】

In addition, most of the closed transport path L through which the pallet P ... circulates is part p.₁~ p₅Since it is used for assembling work, the part spent only for returning the empty pallet P ... is almost eliminated, and the space can be effectively used. On the other hand, the return line for returning the empty pallet P is the door D._L, D_RIn the conventional one, which is provided separately from the work line for transporting the actual pallet P equipped with, the space for providing the return line is wasted, and the inside of the pit where the floor surface is dug down to avoid wasting space. If a return line is provided in, there is a problem that the construction cost will increase significantly because the excavation of the pit will be large. Therefore, according to the transfer device of this embodiment, not only the length of the transfer path L can be changed extremely easily, but also an assembly line with high workability is constructed with the minimum space and the minimum equipment cost. be able to.

【0047】

Although the examples of the present invention have been described in detail above, the present invention can make various design changes without departing from the gist thereof.

【0048】

For example, in the first embodiment, the left and right doors D_L, D_RIs supported in a posture orthogonal to the longitudinal direction of the pallet P, but the left and right doors D are shown in the second embodiment of FIGS. 9 and 10._L, D_RIs supported diagonally with respect to the longitudinal direction of the pallet P, the space on the upper surface of the pallet P can be effectively used to improve workability.

【0049】

Also, in the embodiment, the door D of the automobile_L, D_RAlthough the assembly line of the above is illustrated, it can be applied to the assembly line of any other workpiece of the present invention.

【0050】

[Effect of the invention]

According to the invention described in claim 1 as described above, since the pallet is provided with the component support portion for supporting the component to be assembled to the work, it is necessary to sequentially supply the component to the pallet moving in the transport path from the outside. It disappears and workability is improved. Moreover, since parts can be assembled with the air accumulated in the air tank provided on the pallet without sequentially supplying air to the pallet moving along the transport path from the outside, the handling of the air hose is simplified. Further, while the pallet circulates in the transport path, especially when the pallet is at the end of the first traverser, air can be supplied to the air tank from the air supply means provided at the end of the traverser, so that the air to the air tank can be supplied. Can be easily supplied.

【0051】

Further, according to the invention described in claim 2, since the work supported by the work support jig is moved up and down by the air cylinder, the work is supported at a position suitable for the work to efficiently assemble the parts. be able to. Moreover, since the air cylinder is driven by the air tank provided on the pallet without sequentially supplying air to the pallet moving in the transport path from the outside, the routing of the air hose to the air cylinder is simplified.

【0052】

Further, according to the invention of claim 3, since the air tool is driven by the air tank provided on the pallet without sequentially supplying air from the outside to the pallet moving in the transport path, the air hose for the air tool is used. Not only is the handling simplified, but the operability of the air tool is also improved.

【0053】

Further, according to the invention described in claim 4, at the end of the first traverser, the empty component tray supported by the component support portion is removed and discharged to the empty tray discharge station, and at the same time, air is discharged from the air supply means. Air can be supplied to the tank.

[Simple explanation of drawings]

[Figure 1]

Plan view of a sub-line that subassembles a car door [Figure 2]

Section 2-2 sectional view of Fig. 1 [Fig. 3]

3-3 arrow view of Fig. 1 [Fig. 4]

Section 4-4 of Figure 1 [Fig. 5]

Enlarged view of 5 parts in Fig. 1 [Fig. 6]

6-direction arrow view of Fig. 5 [Fig. 7]

7-direction arrow view of Fig. 5 [Fig. 8]

Explanation of the operation of Traversa [Fig. 9]

The figure corresponding to FIG. 5 which concerns on 2nd Example of this invention. [Fig. 10]

10-direction arrow view of Fig. 9 [Explanation of symbols]

C₁ 1st conveyor C₂ 2nd conveyor D_L Door (work) D_R Door (work) L transport route P pallet S₁ Carry-in station S₂ Carry-out station S₄ Empty tray discharge station T air tool T₁ 1st traverser T₂ 2nd traverser p₁~ p₅ parts 15 Door support jig (work support jig) 15₁ Air cylinder 16 Door support jig (work support jig) 16₁ Air cylinder 17 Tray support base (part support part) 18 Parts tray 19 Air tank 38 Air supply means