Impact test apparatus

The present invention relates to an improvement of an impact test apparatus.

For example, the vehicle is required to be durable against vandalism from the outside against the illegal act called vandalism on the vehicle. In a vehicle, a windshield, a rear glass, and a door glass are fitted to a steel body, and these glasses are fragile parts as compared with a steel plate. Such glass is strengthened by heat treatment or by increasing the plate thickness. It is necessary to quantitatively confirm whether or not this strengthening measure has reached the standard (security standard, etc.), and an impact test device is used for the confirmation.

Various types of impact test devices have been proposed (see, for example, Patent Document 1).<patcit num="1"><text>Japanese Patent Application Laid-Open No. 56-43526 (Fig. 1)</text></patcit>

Patent Document 1 will be described with reference to the following figure. FIG. 11 is a diagram illustrating a basic configuration of a conventional technique, and as shown in (a), the dent test device 101 is swingably attached to a support column 103 supported by a support base 102 and a support column 103. It is composed of an arm 104, a hammer 105 fixed to the tip of the arm 104, a handle 106 attached to the tip of the arm 104, and a locking device 107 for stopping the arm 104 at the swing start position.

The examiner holds the handle 106 and fastens the arm 104 to the locking device 107. Next, the test object 108 is set on the support base 102. Then, the examiner operates the locking device 107 to disconnect the arm 104 from the locking device 107. As shown in (b), the arm 104 rotates counterclockwise around the axis 109, and the hammer 105 collides with the test object 108.

By the way, when the glass of the vehicle is the object to be tested, it is recommended that the test procedure be repeated (for example, 5 times) in a row. The examiner needs to repeat (a) and (b) a plurality of times by lifting and dropping the arm 104. This puts a heavy burden on the examiner, lengthens the test time, and reduces the efficiency of the test.

<p> An object of the present invention is to provide an impact test apparatus capable of continuous striking.</p>

<p> The invention according to claim 1 is an impact test apparatus having a support column provided on a substrate and a pendulum arm supported by the support column, provided with an impact piece at the tip, and swingable up and down. The base portion is slidably contacted with a rotary cam rotatably provided on the support column, and the rotary cam is rotated in one direction by a rotation drive means provided on the support column as many times as necessary. ..</p><p> The invention according to claim 2 is characterized by comprising a rotation amount detecting means for detecting the rotation amount of the rotation cam.</p><p> According to the third aspect of the present invention, the rotation amount detecting means includes a protrusion provided on the side surface of the rotation cam, a protrusion detection sensor for detecting the protrusion, and a rotation cam based on the detection information detected by the sensor. It is characterized by including a rotation amount calculation unit that calculates a rotation amount.</p><p> The invention according to claim 4 is characterized in that the rotary driving means includes a brake.</p><p> According to the fifth aspect of the present invention, the rotary cam is composed of a plurality of rotary cams having different cam shapes, and these rotary cams are provided parallel to each other on a common shaft, and the common shaft is forcibly moved. Therefore, one of the plurality of rotary cams is made to face the base of the pendulum arm.</p><p> According to the invention of claim 6, the rotary cam is composed of a plurality of rotary cams having different cam shapes, and a relay member is interposed between the rotary cams and the base of the pendulum arm, and the relay member is compulsorily used. It is characterized in that one of the plurality of rotary cams is relayed to the base of the pendulum arm by moving to.</p>

<p> In the invention according to claim 1, by using a rotary cam and a rotary drive means for the pendulum arm, it is possible to continuously give an impact to the test object. As a result, the efficiency of the test can be improved.</p><p> In the invention according to claim 2, since the rotation amount detecting means is provided, the impact test apparatus can be stopped at an arbitrary rotation speed.</p><p> In the invention according to claim 3, the impact test device can be stopped at an arbitrary rotation speed by using a detection sensor that detects a protrusion provided on the side surface of the rotating cam, and the rotating cam can be stopped at an arbitrary position. You can stop it.</p><p> In the invention according to claim 4, since the rotation of the rotary cam can be stopped quickly by providing the brake, the impact test can be performed even when the rotary cam is rotated at high speed. become.</p><p> In the invention according to claim 5, one of them is composed of a plurality of rotary cams having different cam shapes, which are provided parallel to each other on a common shaft so that the common shaft can be forcibly moved. It is possible to perform a test on a plurality of test objects having different sizes, particularly heights, with a test device.</p><p> In the invention according to claim 6, one of the plurality of rotary cams is formed by forming a plurality of rotary cams having different cam shapes, interposing a relay member between the cams and the base of the pendulum arm, and forcibly moving the cams. By relaying to the base of the pendulum arm, it is possible to perform a test on a plurality of test objects having different sizes, particularly heights, with one test device.</p>

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings shall be viewed in the direction of the reference numerals. FIG. 1 is a side view of the impact test apparatus according to the present invention. The impact test apparatus 10 includes a substrate 11, columns 12 and 12 supported by the substrate 11, and rotational driving means 13 supported by the left column 12. And, the rotation speed of the brake 14 attached to the rear part (left side in the figure) of the rotation drive means 13 to brake the rotation drive means 13 and the rotation drive means 13 attached to the front part (right side in the figure) of the rotation drive means 13 is reduced. It is fixed to the speed reducer 15, the rotary cam 17 attached to the rotating shaft 16 extending from the speed reducer 15, the box frame 18 supported by the speed reducer 15 and the right column 12, and the lower end of the box frame 18. The bearing boxes 19 and 19, the pendulum arm support shaft 21 passed between the bearing boxes 19 and 19, and the pendulum arm 22 supported by the pendulum arm support shaft 21 and whose base is in sliding contact with the rotary cam 17. The impact piece 23 fixed to the tip of the pendulum arm 22 and the rotation amount detecting means 24 installed on the box frame 18 so as to face the rotation cam 17.

The rotary drive means 13 is preferably an electric motor, but can also be applied to a rotary actuator such as an air motor or a hydraulic motor. The speed reducer 15 is preferably a gear speed reducer, and a combination of a plurality of gears or a planetary gear speed reducer can be applied. The rotation amount detecting means 24 is preferably a proximity switch that detects a metal piece (a protrusion described later) by an eddy current action, but may be a means for directly detecting the rotation amount such as a rotary encoder, regardless of the type. ..

The brake 14, the rotary drive means 13, the brake driver 25, and the motor driver 26 are controlled by the test device control unit 27. The test device control unit 27, for example, sets the start switch 28, the operation lamp 29, the number of hits setting dial 31, the set number of times display unit 32, the number of times calculation unit 33, the actual number of times display unit 34, and the end of the test. It consists of a buzzer 35 to inform.

FIG. 2 is a sectional view taken along line 2-2 of FIG. 1. The rotating cam 17 includes protrusions 36A, 36B, 36C, and 36D arranged at equal pitches (for example, 90 ° pitch). The rotary cam 17 has a step that instantly connects the large diameter portion 17a, the small diameter portion 17b, the diameter gradual change portion 17c that gently connects the large diameter portion 17a and the small diameter portion 17b, and the small diameter portion 17b to the large diameter portion 17a. A simple disc cam consisting of parts 17d can be adopted.

Further, the box frame 18 includes a pendulum arm upper limit stopper 38 that defines the upper limit of the pendulum arm 22, and a pendulum arm lower limit stopper 39 that defines the lower limit of the pendulum arm 22.

The operation of the impact test apparatus 10 having the above configuration will be described below. FIG. 3 is an operation diagram for explaining from the start of the test to the end of the striking. In (a), the base of the pendulum arm 22 is in contact with the large diameter portion 17a and is held at the test start position (height). .. The rotation amount detecting means 24 detects the protrusion 36B. From here, the rotary cam 17 is rotated counterclockwise at a constant speed. When the base of the pendulum arm 22 moves from the large diameter portion 17a to the step portion 17d, the base of the pendulum arm 22 becomes free and rotates counterclockwise around the pendulum arm support shaft 21. As a result, as shown in (b), the impact piece 23 collides with the test object 37.

FIG. 4 is an action diagram for explaining from the end of striking to the return. Since the rotating cam 17 rotates counterclockwise at a constant speed, the base of the pendulum arm 22 is the action of the gradual change portion 17c, and the pendulum arm It rotates clockwise around the support shaft 21. As a result, the impact piece 23 gradually separates from the test object 37. When the further rotation cam 17 rotates and the protrusion 36B reaches the rotation amount detecting means 24, the process returns to FIG. 3A. That is, if the rotation amount detecting means 24 detects the protrusions 36A to 36D and detects four, it is recognized that one impact work has been completed.

Explaining the comprehensive test procedure based on FIG. 1, the examiner sets the number of hits (for example, 5) on the test device control unit 27 with the hit number setting dial 31. This number of times is displayed on the set number of times display unit 32. The examiner presses the start switch 28. Then, the rotary drive means 13 starts, the rotary cam 17 starts to rotate, and the impact tests of FIGS. 3 (a), 3 (b) and 4 are executed.

At this time, the rotation amount detecting means 24 detects the protrusions 36A to 36D. This detection signal is sent to the number-of-times calculation unit 33, and the number-of-times calculation unit 33 considers that one test has been completed with four detections, and causes the actual number-of-times display unit 34 to display the cumulative number of times. The actual number display unit 34 displays the number from 0 to the set value, and can know the progress status of the test. When the actual number of times reaches the set number of times, the test device control unit 27 sounds the buzzer 35, stops the energization of the rotary drive means 13, and puts the brake 14 in the braking state.

By continuously rotating the rotary cam 17 at a constant speed, for example, five impact tests can be performed. The examiner only has to start the test, and the burden on the test is lightened.

Another embodiment of the impact test apparatus according to the present invention will be described below. FIG. 5 is a diagram of another embodiment of the impact test apparatus according to the present invention. Reference numerals are used for common elements with FIG. 1, and detailed description thereof will be omitted. The internal structure of the box frame 18 was changed with respect to Fig. 1. That is, the rotating shaft 16 is a spline shaft, and the moving shaft 41 is fitted to the spline shaft so as to be movable in the axial direction, and a small rotating cam 17f and a large rotating cam 17g are attached to the moving shaft 41 and a fork receiver. Axles 43 and 43 were integrally formed.

The tip of the switching lever 42 is inserted between these fork receiving collars 43 and 43, the switching lever 42 is oscillatingly fixed to the box frame 18, and a knob 44 is provided at the base of the switching lever 42 protruding from the box frame 18. It was. FIG. 6 (a) is a view from the arrow a of FIG. 5, showing the shape of the small rotary cam 17f, and FIG. 6 (b) is the view from the arrow b of FIG. 5, and the shape of the large rotary cam 17g. Is shown.

In FIG. 5, a large rotary cam 17 g contributes to the swing of the pendulum arm 22. When the knob 44 is operated to rotate the switching lever 42 counterclockwise, the moving shaft 41 moves to the right in the figure as shown by the imaginary line. Then, the small rotary cam 17f contributes to the swing of the pendulum arm 22. That is, an impact test device capable of carrying out tests of two specifications is provided.

FIG. 7 is a further embodiment diagram of the impact test apparatus according to the present invention, and reference numerals are used for common elements with FIG. 1, and detailed description thereof will be omitted. A small rotary cam 17f and a large rotary cam 17g are built in the box frame 18, and these rotary cams 17f and 17g are fixed to the rotary shaft 16. Instead, a relay member 46 is interposed between the rotary cams 17f and 17g and the pendulum arm 22.

The relay member 46 is integrally supported by the shift shaft 47, and the shift shaft 47 is movably supported by the bosses 48 and 48 to the box frame 18. When the knob 49 is operated to move the shift shaft 47 in the left-right direction in the figure, the relay member 46 selectively abuts on the large rotary cam 17g or the small rotary cam 17f.

FIG. 8 is a cross-sectional view taken along line 8-8 of FIG. 7. When the large rotary cam 17g rotates, the relay member 46 swings up and down around the shift shaft 47, and the relay member 46 swings the pendulum arm 22. Swing.

FIG. 9 is an operation diagram of FIG. 7, and by shifting the relay member 46, the relay member 46 can be brought into contact with the small rotary cam 17f. FIG. 10 is a cross-sectional view taken along the line 10-10 of FIG. 9. When the small rotary cam 17f rotates, the relay member 46 swings up and down around the shift shaft 47, and the relay member 46 swings the pendulum arm 22. Move it.

Although two rotating cams 17 are installed in FIGS. 7 and 9 for convenience of explanation, it is possible to install three or more rotating cams 17 depending on the type of the test object. By installing three such rotating cams 17, it is possible to perform impact tests on a plurality of vehicles such as SUVs, sedans, and sports cars with different wind inclinations.

The impact test apparatus according to the present invention is suitable for an impact test in which an impact needs to be applied a plurality of times within a predetermined time.

<figref num="1">It is a side view of the impact test apparatus which concerns on this invention.</figref><figref num="2">It is a cross-sectional view taken along the line 2-2 of FIG.</figref><figref num="3">It is an action diagram explaining from the start of a test to the end of a blow.</figref><figref num="4">It is an action diagram explaining from the end of a blow to the return.</figref><figref num="5">It is another example diagram of the impact test apparatus which concerns on this invention.</figref><figref num="6">(a) is a view from arrow a in FIG. 5, and (b) is a view from arrow b in FIG.</figref><figref num="7">It is a further example figure of the impact test apparatus which concerns on this invention.</figref><figref num="8">It is sectional drawing of line 8-8 of FIG.</figref><figref num="9">It is an operation diagram of FIG.</figref><figref num="10">It is a cross-sectional view taken along the line 10-10 of FIG.</figref><figref num="11">It is a figure explaining the basic structure of the prior art.</figref>

Code description

10 ... Impact test equipment, 11 ... Board, 12 ... Strut, 13 ... Rotation drive means, 14 ... Brake, 16 ... Rotation shaft, 17 ... Rotation cam, 22. .. Pendulum arm, 23 ... Impact piece, 24 ... Rotation amount detection means, 33 ... Number calculation unit, 36 ... Projection, 41 ... Movement axis, 46 ... Relay member, 47 ... Shift axis.