JP4434475B2 - Drop impact test equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drop impact test apparatus for dropping a subject from a predetermined height to collide with a colliding body and observing the degree of destruction of the subject due to the drop impact.
[0002]
[Prior art]
For example, when a new mobile phone is developed, the test subject is a new mobile phone that falls from a predetermined height and collides with the colliding body, and the so-called drop strength evaluation is performed to observe the degree of destruction caused by the drop impact. There is no.
[0003]
In this type of drop impact test, an operator first held the subject in his hand and allowed the subject to fall freely from a predetermined height. If this test is repeated, not only will the labor be burdened by the worker, the workability will be poor, but also the posture when the subject collides with the collision target will not be constant, and the evaluation of the drop strength will differ each time and the reliability will be reliable. The nature is bad.
[0004]
In view of this, a drop impact test apparatus has been developed that always keeps the posture of a dropped subject to collide with a collision target.
For example, as shown in FIG. 10A, a collision body 51 is placed on the substrate 50, and a guide body 52 including a plurality of columns is erected at a position surrounding the collision body 51. A holding plate 53 is engaged with the guide body 52 so as to be movable up and down, and the subject S is mounted and fixed on the holding plate 53 by a fastener 54 such as a band.
[0005]
If the holding plate 53 is dropped from a predetermined position in this state, the subject S collides with the collision body 51 together with the holding plate 53 as shown in FIG. Accordingly, the posture of the subject S does not change at all, and the drop impact is always received in the same posture.
[0006]
As another means, there is a drop impact test apparatus filed by the present applicant in Japanese Patent Application No. 9-318158. FIG. 11A shows a holding mechanism 60 that is a part of the apparatus. The holding mechanism 60 includes two locking claws 62 on the left and right projecting members 61, and ends of the locking claws 62 are rotatably supported via an elastic member 63 such as a toggle spring. The
[0007]
As shown in FIG. 11 (b), both side surfaces of the subject S are locked by the left and right locking claws 62, and the holding mechanism 60 falls in this state. As shown in FIG. 11C, each locking claw 62 is rotated by an impact when the subject S collides with a collision body (not shown), and the subject S is released. Therefore, at the time of this collision, the subject holds the initial holding posture.
[0008]
[Problems to be solved by the invention]
By the way, in the former drop impact test apparatus, it is the holding plate 53 that directly collides with the collision body 51, and the subject S receives the drop impact indirectly via the holding plate 53. Therefore, the result is different from the case where the subject S directly collides with the collision body 51 and receives a drop impact, and the drop impact characteristics of the casing of the subject S cannot be examined.
[0009]
In the latter drop impact test apparatus, it is difficult to set the holding force for the subject S when testing a heavy object of 1 kg or more. That is, the holding force with respect to the subject S is weakened by adjusting the distance between the tips of the opposing locking claws 62.
[0010]
If it is too strong, the timing at which the locking claw 62 releases the subject S at the time of collision shifts, and the falling inertia force of the holding mechanism 60 is applied to the subject S, and an excessive impact force is applied to the subject S. If it is too weak, the subject S cannot be reliably held, the holding posture of the subject S changes during the fall, the collision site is different, and the reproducibility of the collision is lowered.
[0011]
Further, as a defect common to both apparatuses, in order to perform a test again after dropping the holding plate 53 (holding mechanism 60) together with the subject S, the test piece and the holding plate 53 (holding mechanism 60) dropped by the operator are tested. The body S must be pulled up to a predetermined height position. When the number of tests reaches several thousand, the burden on the worker becomes extremely large.
[0012]
The present invention has been made in order to solve the above-described problems, and the purpose of the present invention is to efficiently perform a test with high reproducibility of collision so that the subject's case is subjected to a drop impact in the same posture. At the same time, the present invention intends to provide a drop impact test apparatus that ensures safety.
[0013]
[Means for Solving the Problems]
To satisfy the above purpose The present invention provides a subject Holding means for restraining and holding, lifting and lowering means provided so as to be able to come into contact with and away from this holding means and dropping the holding means from a predetermined height, and a colliding body on which the dropped subject collides And this It is disposed in the vicinity of the collision body, and includes a restraint releasing means for engaging with the holding means immediately before the subject collides with the collision body and releasing the restraint on the subject. The holding means includes a holding plate engaged with the elevating means and guided to move up and down, a pair of left and right arms each having one end rotatably supported by the holding plate, and the other end of the arm pair. A buffer member provided on the arm and an elastic member that is stretched between the pair of arms and elastically pulls and biases the buffer member in a direction close to each other to restrain and hold both sides of the subject. The means includes a receiving pin provided on the arm, and a cam body for engaging the receiving pin immediately before the holding means drops and the subject collides with the collision body to separate the arm pair from each other against the elastic force of the elastic member. When It is characterized by comprising.
[0018]
Adopting means to solve these issues Subject The casings of the two bodies collide against the collision object in the same posture and receive a drop impact, so that highly reproducible tests can be performed efficiently and safety can be ensured.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a front view of a drop impact test apparatus, and FIG. 1B is a side view of the apparatus.
[0020]
In the figure, reference numeral 1 denotes a base made of a base plate having a predetermined height and formed in a substantially U shape in plan view. On the center of the plane of the base 1, a guide body 2 made up of columns is erected. A plurality of handles 3 are provided in a horizontal direction at a predetermined height on the back side of the guide body 2, and a free wheel 4 is provided on the back side of the base 1. By holding one of the handles 3 and tilting the guide body 2 so that the free wheel 4 comes into contact with the floor surface, it can move like a handcart.
[0021]
An elevating plate 5 is attached to the guide body 2 so as to be movable up and down, and an elevating drive mechanism 6 provided on the base 1 and the guide body 2 is connected to the elevating plate 5 to drive the elevating plate 5 up and down. ing.
[0022]
The elevating drive mechanism 6 includes a first drive motor 7 disposed on the base 1 in the vicinity of the guide body 2, and a drive sprocket (not shown) is fitted to the rotation shaft of the first drive motor. Is done. Further, a driven sprocket (not shown) is attached to the side surface of the upper end portion of the guide body 2, and a chain 8 shown in a simplified manner is stretched over the drive sprocket and the driven sprocket.
[0023]
The elevating plate 5 is connected to the middle portion of the chain 8 via a connector 9, and the chain 8 travels by driving the first drive motor 7. It will be displaced up and down along the body 2.
[0024]
A hooking / removing mechanism 10 is attached to the lifting plate 5. The hooking / removing mechanism 10 is provided with a second drive motor 11 in which a worm (not shown) is attached to a rotating shaft, and a worm gear (not shown) that meshes with the worm of the second drive motor 11 at one end. And an actuating lever 12 that is rotationally displaced.
[0025]
One end of the operating lever 12 is rotatably attached to the lifting plate 5 via a support shaft, and the other end is formed in a key shape and protrudes downward from the lower edge of the lifting plate 5. The actuating lever 12 is detachably engaged with a holding mechanism (holding means) 15 described later.
[0026]
The guide body 2, the elevating plate 5 that can be moved up and down along the guide body, the elevating drive mechanism 6 that drives the elevating plate to move up and down, and the hanging mechanism that is provided on the elevating plate 5 and engages and disengages the holding mechanism 15 10 constitutes an elevating mechanism (elevating means) 13.
[0027]
The holding mechanism 15 includes a holding plate 16 that engages with the guide body 2 and is guided up and down. A latch pin 17 is provided at the upper end of the holding plate 16 so that the operating lever 12 of the latch mechanism 10 is latched.
[0028]
As shown in FIG. 1A, if the operating lever 12 is engaged with the engaging pin 17, the elevating plate 5 and the holding plate 16 are intimately integrated with each other and can be moved up and down along the guide body 2. The second drive motor 11 When the operating lever 12 is rotated and displaced through the worm and the worm gear as shown by a two-dot chain line in the figure, the operating lever 12 is disengaged from the engaging pin 17 and the elevating plate 5 and the holding plate 16 are completely separated. Is done.
[0029]
On the holding plate 16, upper ends of a pair of arms 18 formed in a substantially U shape are rotatably supported at positions close to each other. Gears (not shown) are attached to the support portions of the holding plates 16 of the arms 18 and are in mesh with each other.
[0030]
Therefore, if one arm 18 is urged to rotate in any one direction by an appropriate angle, the gears mesh and rotate by the same angle, and the other arm 18 rotates by the same angle in the opposite direction.
[0031]
A buffer member 19 made of a urethane material or the like is attached to the other end of the arm pair 18. In addition, a tension spring 20 that is an elastic member is stretched between the arm pair 18 and elastically pulls the other end of each arm in a direction approaching each other.
[0032]
When the operator urges one arm 18 against the elastic force of the tension spring 20, the distance between the buffer members 19 increases. If the subject S is interposed between the buffer members 19 and then the rotational force with respect to the arm 18 is released, the buffer member 19 comes into contact with the subject S and restrains the subject from both sides. .
[0033]
Even if the width dimension of the subject S varies, or even if the contact surface between the subject S and the buffer member 19 is shifted, the buffer member 19 absorbs the deformation and ensures the subject without any trouble. S can be restrained and held.
[0034]
Further, receiving pins 21 protrude from the same portion on the back side of each arm 18, and a pair of left and right plate cams (cam bodies) 22 are provided at predetermined portions on the base 1. A release mechanism (constraint release means) 23 is configured.
[0035]
The plate cam 22 has a base end portion having a predetermined width dimension in a front view, has an inner side surface that is the highest at the upper end portion, and is formed in a sharp shape that is inclined obliquely toward the outer side surface. The plate cam 22 is disposed at a position where the receiving pin 21 provided on the arm 18 abuts the upper end inclined surface of the plate cam 22 in a state where the holding plate 16 is lowered.
[0036]
An installation table 25 is attached to the guide body 2 in accordance with a position (110 to 130 cm above the ground) where an operator at a predetermined height sits on a chair and is substantially equal to the height of the eyes. The installation base 25 is attached to the guide body 2 via an appropriate rotation mechanism, and can be freely displaced from the front position to a position that does not hinder the drop of the holding plate or the like.
[0037]
A collision body 26 and a shock absorbing damper (shock absorbing means) 27 are arranged side by side in the front U-shaped base 1 space. The collision body 26 is disposed at a position where the subject S held by the holding mechanism 15 collides during a drop impact test, and is made of, for example, a concrete plate. The shock absorbing damper 27 is disposed at a position where the holding plate 16 collides, and is composed of, for example, a hydraulic cylinder.
[0038]
The first drive motor 7 and the second drive motor constituting the lifting mechanism 13 11 Are electrically connected to a control device (control means) 30 and are automatically driven and controlled based on operation instructions.
[0039]
The elevating mechanism 13 including the holding mechanism 15 described above, the collision body 26, and the restraint releasing mechanism 23 are all surrounded by the cover body 40, and safety is ensured. Openings 41 and 42 are provided on the front upper and lower parts of the cover body 40. Furthermore, in order to ensure safety, it is desirable that these openings 41 and 42 be provided with door bodies that can be opened and closed as necessary.
[0040]
The opening 41 on the upper side is provided substantially opposite to the mounting position of the installation table 25, and the opening 42 on the lower side is provided at the optimum position for picking up the subject S that has finished the drop impact test. Furthermore, area sensors (detection means) 43 having the opening as a detection range are attached to the left and right sides of the upper and lower openings 41 and 42, respectively.
[0041]
These area sensors 43 are electrically connected to the control device 30, and when a hand or other object is inserted into each of the openings 41 and 42, the area sensor 43 detects and detects the detection signal. To send to.
[0042]
The timing at which the detection signal is sent from the area sensor 43 to the control device 30 is the second drive motor. 11 Control signal to stop the operation of the elevating drive mechanism 6 and the engagement / removal mechanism 10 is issued except when the operation lever 12 is separated from the engaging pin 17, that is, when the holding plate 16 is separated from the elevating plate 5. It is.
[0043]
FIG. 5 shows an operation panel that houses the control device 30. This is equipped with the switches and counters described below.
As switches, a power switch 31, an operation button 32a, a stop button 32b, and an origin return button 33 are provided from the leftmost end to the right direction. Further, an automatic / manual selection button 34, a holding mechanism release button 35a, a lift plate raising button 35b, a lift plate lowering button 35c, and an end button 36 are provided.
As a counter, a counter display part 37 is provided in the center part, and an error number display part 38 is provided on the left side part.
[0044]
At the time of maintenance adjustment, etc., the automatic / manual selection button 34 is manually selected, and then the holding mechanism release button 35a, the lifting plate raising button 35b, and the lifting plate lowering button 35c are operated.
[0045]
In normal driving operation, the automatic / manual selection button 34 is switched to automatic, and then the driving button 32a, the stop button 32b, and the origin return button 33 are properly used.
[0046]
The drop impact test apparatus configured as described above operates from the attachment of the subject S to the drop impact as shown in FIGS. 2 (a) to 2 (d). Hereinafter, it demonstrates in order.
[0047]
As shown in FIG. 2A, the subject S is placed on the installation table 25 and the subject S is restrained and held by the holding mechanism 15. This operation is performed through the upper side opening 41 of the cover body 40 described with reference to FIG. 1, and the opening 41 is open at the eye level while the operator is seated on the chair. Therefore, it is easy to work and requires less labor.
[0048]
Specifically, one arm 18 provided on the holding plate 16 is pushed and held together with the other arm 18 against the elastic force of the tension spring 20, and the subject S is held between the buffer members 19 of these arms 18. The subject S is placed on the installation base 25 and the arm 18 is released.
[0049]
The elastic return force of the tension spring 20 stretched over the arm pair 18 acts, and as shown in FIG. 4A, each buffer member 19 restrains and holds the subject S from both sides. Since the subject S is placed on the installation table 25 to work, the posture of the subject S held by the holding mechanism 15 can be confirmed, and the subject S always has the same holding posture.
[0050]
Next, in order to perform a drop impact test, the operator retracts the installation base 25 to a predetermined site and closes the openings 41 and 42 with doors. Then, the operation button 32a on the operation panel is pressed. As shown in FIG. 2B, the first drive motor 7 of the lifting mechanism 13 is driven to raise the lifting plate 5.
[0051]
At this time, the holding plate 16 is connected to the elevating plate 5 through the hanging mechanism 10 and moves integrally. Naturally, the subject S restrained and held by the holding plate 16 via the arm 18 also rises integrally. When the upper end of the guide body 2 is reached, the first drive motor 7 stops and the subject S is set to a predetermined height.
[0052]
As shown in FIG. 2 (c), the second drive motor 11 of the hooking / removing mechanism 10 is actuated at a timing, and the actuating lever 12 is separated from the hooking pin 17 provided on the holding plate 16. The holding plate 16 is released, and the arm 18 starts dropping while restraining and holding the subject S via the buffer member 19. The drop speed is accelerated according to the drop position of the holding plate 16.
[0053]
As shown in FIG. 2D, the holding plate 16 finally reaches the lowermost part of the guide body 2 and collides with the shock absorbing damper 27, so that the shock is absorbed. Accordingly, not only the holding plate 16 but also the arm pair 18 and the like are prevented from being damaged.
[0054]
The subject S collides with the collision body 26 and receives a drop impact. However, immediately before this collision, the restraint release mechanism 23 acts to release the restraint of the holding mechanism 15 from the subject S. As a result, the subject S collides with the collision body 26 while maintaining the posture held by the holding mechanism 15.
[0055]
FIG. 4B shows an enlarged view of the action of the restraint release mechanism 23 that releases the restraint holding of the subject S from the holding mechanism 15. That is, as the holding plate 16 falls, the receiving pin 21 provided on the arm pair 18 comes into contact with the upper end inclined surface of the plate cam 22. Due to the shape of the plate cam 22, the receiving pin 21 is guided obliquely toward the outside, and the arm 18 integrated with the receiving pin 21 is rotated.
[0056]
The arm pair 18 rotates against the elastic force of the tension spring 20, and the buffer members 19 are separated from the subject S. Therefore, the restraint holding of the buffer member 19 with respect to the subject S is forcibly released. To repeat, the subject S collides with the collision body 26 while maintaining the initial restraint holding posture by the holding mechanism 15.
[0057]
Thus, the posture of the subject S with respect to the collision body 26 can be maintained, and there is no influence due to external force. For this reason, a drop impact test simulating free fall in the subject S can be performed with good reproducibility.
[0058]
Further, the holding mechanism 15 can secure the holding force for the subject S by the elastic force of the tension spring 20 between the arm pair 18 and can reliably hold the subject S. The holding posture with respect to the subject S can be changed in a range from the mutual spacing between the buffer members 19 when the tension spring 20 is the natural length to the mutual spacing between the buffer members 19 when the arm 18 is rotated to the maximum. Therefore, the collision posture of the subject S can be changed within a predetermined range.
[0059]
FIGS. 3A to 3C sequentially show the operation after the drop impact test is completed. In addition, although the test subject S which fell is shown in the figure as it is, usually, it will lie down on the collision body 26, or it will be crushed and scattered.
[0060]
FIG. 3A shows a state in which the first drive motor 7 of the elevating mechanism 13 is driven in reverse to run the chain 8 and lower the elevating plate 5. At this time, the posture of the operating lever 12 of the hanging mechanism 10 provided in the elevating plate 5 is not changed.
[0061]
When the elevating plate 5 is lowered to the lowest position and contacts the holding plate 16, the first drive motor 7 is stopped. The second drive motor 11 is driven with timing, and the operating lever 12 engages the engaging pin 17 of the holding plate 16. Therefore, the elevating plate 5 and the holding plate 16 are integrally connected via the operating lever 12 and the engaging pin 17.
[0062]
Next, as shown in FIG. 3B, the first drive motor 7 is driven to rotate forward, the chain 8 travels in the reverse direction, and the elevating plate 5 and the holding plate 16 rise together. The arm 18 attached to the holding plate 16 is also raised integrally, and the receiving pin 21 is separated from the plate cam 22.
[0063]
Again, the elastic force of the tension spring 20 acts to rotate the arm pair 18 to displace the buffer members 19 in directions close to each other. Accordingly, the distance between the buffer members 19 changes to the natural length of the tension spring.
[0064]
As shown in FIG. 3C, when the elevating plate 5 and the holding plate 16 reach the predetermined height position, the operation of the first drive motor 7 is stopped. That is, it will be in the standby state until the drop impact test of the following subject S is made.
[0065]
For example, a buzzer notifies when all the operations are completed. The safety has been confirmed, and the operator removes the subject S who has been subjected to the drop impact test through the opening on the lower side. And a series of drop impact tests are completed by displacing the installation base 25 to the original position via the upper side opening 41.
[0066]
As described above, the returning of the elevating plate 5 and the holding plate 16 to the original standby state is entirely automated and is not directly performed by the operator. Thus, safety can be ensured and workability can be improved.
[0067]
If the area sensor 43 provided in the upper and lower openings 41, 42 sends a detection signal to the control device 30 except when the hooking / removing mechanism 10 is operated and the holding plate 16 is separated from the lifting plate 5, The operation of the drive mechanism 6 and the hooking mechanism 10 is stopped as described above.
[0068]
In other words, even if the area sensor 43 outputs a detection signal when the hooking / removing mechanism 10 is operated to disconnect the holding plate 16 from the lifting plate 5, the operation of the lifting drive mechanism 6 cannot be stopped. However, at this time, the holding plate 16 is in the process of falling while holding the subject S, and the dropping ends almost instantaneously.
[0069]
At this time, even if an object is inserted into the upper and lower openings 41, 42, it is after the subject S has already dropped and passed, so safety is ensured. However, of course, it is better not to insert an object at this time.
[0070]
FIG. 6A shows a flowchart in a normal test operation. The operations described above with reference to FIGS. 2A to 2D and the operations described with reference to FIGS. 3A to 3C correspond to steps S6 to S14.
[0071]
The operation button shown in step S7 corresponds to the operation button 32a provided on the operation panel described in FIG. The details of each step will not be described here.
[0072]
Details of step Sa interposed between the above steps are shown in FIG. That is, in step Sb, it is confirmed that the installation base is stored and there is no hindrance to the raising and lowering of the holding mechanism, and the area sensor is not shut off in step Sc, and no object is inserted into the openings 41 and 42. There is confirmation of this, and there is a stop of the lifting plate in the case of No in Steps Sb and Sc in Step Sd.
[0073]
If the day's work is completed, the process moves from step S14 to step S15. When the end button 36 is pressed in step S15, the elevating mechanism 13 is actuated in step S16 to lower the elevating plate 5 and stop near the lowermost portion which is below.
[0074]
At the start of work on the next day, after the power switch 31 is turned on in step S1, the process proceeds to step S2 and the origin return button 33 is pressed. Until this time, the lifting plate 5 is in the vicinity of the lowermost part of step S16, but in step S3 through step Sa, the lifting plate 5 is once lowered to the lowermost part and pushes a switch (not shown).
[0075]
That is, after a signal for confirming the presence of the lifting plate 5 is sent from the switch to the control device 30, the lifting plate 5 is raised in step S4 via step Sa. When the lifting plate 5 is stopped at the holding position with respect to the subject S in step S5 via step Sa, the state returns to the state described above with reference to FIG. Thereafter, step S6 to step S14 are repeated.
[0076]
7 to 9 show other embodiments different from the above-described embodiment of the present invention.
[0077]
The holding mechanism 15 </ b> A shown in FIG. 7 is characterized in that a damper member 39 is provided between the arm pair 18 in parallel with the tension spring 20. That is, by attaching both end portions of the damper member 39 to the arm pair 18, the elastic force of the tension spring 20 suddenly acts, or when the receiving pin 21 contacts the plate cam 22, the arm pair 18 suddenly moves. Provides resistance to displacement.
[0078]
Particularly, since the holding pin 16 falls and the receiving pin 21 collides with the plate cam 22 in the most accelerated state at the lowest position, the damper member 39 relaxes the sudden movement of the arm pair 18 occurring at this time, and the arm pair It is possible to prevent 18 from colliding with the subject S.
[0079]
In the above-described holding mechanisms 15 and 15A, the arm pair 18 is rotatably supported on the holding plate 16 to rotate the arm pair 18, but the present invention is not limited to this. You may make it show in FIG. 8 and FIG.
[0080]
In the holding mechanism 15B shown in FIGS. 8A and 8B, a guide plate 44 is provided so as to face the holding plate 16a vertically. The vertical guide plate 44 is divided into left and right in order to insert the subject S in the vertical direction. A buffer member 19a is interposed between the upper and lower guide plates 44 divided into the left and right, and a tension spring 20a is stretched between the buffer members 19a.
[0081]
Once the buffer member 19a is pushed and expanded against the elastic force of the tension spring 20a, the subject S is inserted through the divided portion of the upper and lower guide plates 44, and then the biasing force on the tension spring 20a is removed, thereby removing the subject. The buffer member 19a is elastically pressed from both the left and right sides of S, and the subject S is restrained and held.
[0082]
Further, bearings 45 are provided between the upper and lower guide plates 44 and on the outer surface side of the buffer member 19a. A straight arm 46 is supported by these bearings 45, one end of the straight arm 46 is connected to the buffer member 19a, and a receiving pin 21a is provided at the other end.
[0083]
FIG. 8A shows a state where the buffer member 19a restrains and holds the subject S. Since each buffer member 19a moves horizontally between the upper and lower guide plates 44 and comes into contact with the subject S, the posture of the subject S is inevitably determined more accurately than the holding by the rotary arm described above.
[0084]
FIG. 8B shows a state in which the holding plate 16a is dropped, the receiving pin 21a is in contact with the plate cam 22a, and the buffer member 19a is pushed and spread. Also at this time, the buffer member 19a is guided by the upper and lower guide plates 44 and translates left and right to release the subject S.
[0085]
That is, when releasing the subject S, the phenomenon of accelerating the subject S does not occur. On the other hand, in the rotary arm 18 described above, the arm rotates while dropping when the subject S is released. When viewed relatively, the subject S is released from the holding mechanism 15 while being accelerated by the arm 18.
[0086]
Therefore, in the test apparatus provided with the holding mechanism 15 by the pivotable arm 18, in order to set the predetermined height that is the drop start position of the subject S, the acceleration due to the pivot of the arm 18 at the time of collision is adjusted. . It is necessary to obtain adjustment data corresponding to each test apparatus or the type, weight, capacity, etc. of the subject S.
[0087]
In the holding mechanism 15A described above, since the subject is released by the translational movement of the buffer member 19a, the subject S is not accelerated, so that adjustment is unnecessary and improvement in reliability can be obtained.
[0088]
A holding mechanism 15C shown in FIGS. 9A and 9B is an example provided with an iron block 47 and an electromagnet 48 instead of the bearing 45, the straight arm 46, the receiving pin 21a and the plate cam 22a described in FIG. is there.
[0089]
That is, here, the holding plate 16b, which is further downsized, includes the same upper and lower guide plates 44 as those in FIG. 6, the buffer member 19a, and the tension spring 20a. An iron block 47 is attached to the outer surface of the buffer member 19a and integrated with each other. Electromagnets 48 are attached to the holding plate 16b by appropriate means between the upper and lower guide plates 44 and on both sides.
[0090]
FIG. 9A shows a state where the electromagnet 48 is turned off and the elastic force of the tension spring 20a is applied, and the buffer member 19a restrains and holds the subject S. FIG. 9B shows a state where the buffer members 19a are pushed and spread immediately before the holding plate 16b falls and the subject S collides with the collision body.
[0091]
At this time, the electromagnet 48 is turned on and the iron block 47 is magnetically attracted. The buffer members 19a are guided by the upper and lower guide plates 44, and translate to the left and right sides to release the subject S. Therefore, when the subject S is released, the phenomenon of accelerating the subject S does not occur, so that a predetermined height adjustment is unnecessary and an improvement in reliability can be obtained.
[0092]
【The invention's effect】
As described above, according to the present invention, it is possible to efficiently perform a test with high reproducibility of the collision posture so that the subject's case receives a drop impact in the same posture.
[Brief description of the drawings]
FIG. 1 is a schematic front view and side view of a drop impact test apparatus showing an embodiment of the present invention.
FIGS. 2A and 2B are diagrams for sequentially explaining a state from holding the subject to causing the subject to drop and collide according to the embodiment;
FIGS. 3A and 3B are diagrams for sequentially explaining the operation of returning the subject to the original position after dropping and colliding the subject according to the embodiment; FIGS.
FIGS. 4A and 4B are diagrams showing a state in which the holding mechanism restrains and holds the subject and a state in which the restraint is released by the restraint releasing mechanism according to the embodiment;
FIG. 5 is a perspective view of a control device including an operation panel according to the embodiment.
FIG. 6 is a flowchart of the operation of the embodiment.
FIG. 7 is a front view of a holding mechanism according to another embodiment.
FIG. 8 is a diagram showing a subject's restraint holding state and restraint release state according to still another embodiment.
FIG. 9 is a diagram showing a subject's restraint holding state and restraint release state according to still another embodiment.
FIG. 10 is a diagram for explaining the configuration and operation of a conventional drop impact test apparatus.
FIG. 11 is a view for explaining the configuration and operation of a holding mechanism in a further different conventional drop impact test apparatus.
[Explanation of symbols]
S ... subject,
15 ... Holding mechanism (holding means),
13: Elevating mechanism (elevating means),
26 ... Collision body,
23 ... Restriction release mechanism (restraint release means),
16 ... holding plate,
18 ... arm,
19 ... cushioning member,
20 ... tension spring (elastic member),
21 ... Receiving pin,
22 ... Plate cam (cam body),
2 ... Guide body,
5 ... Lift plate,
6 ... Elevating drive mechanism,
10 ... hanging mechanism,
30 ... Control device (control means),
27 ... Shock absorbing damper (shock absorbing means),
40 ... cover body,
41 ... upper side opening,
42 ... lower opening,
43 ... Area sensor (detection means)
25 ... Installation stand.

Claims (4)

Holding means for restraining and holding the subject, lifting and lowering means provided so as to be able to contact and separate from the holding means and lifting the holding means to a predetermined height and dropping from the position, and a colliding body on which the dropped subject collides When disposed on the collision body neighborhood, and engage with the holding means immediately before the subject will collide with the collision object, comprising a restraint releasing means for releasing the constraint to the subject,
The holding means is
A holding plate engaged with the elevating means and guided to elevate, a pair of left and right arms each having one end rotatably supported by the holding plate, and a buffer member provided at the other end of the arm pair; An elastic member that is stretched between the pair of arms and elastically pulls and biases the buffer member in a direction close to each other to restrain and hold both sides of the subject.
The restraint releasing means is
A receiving pin provided on the arm, and a cam body that engages with the receiving pin just before the holding means falls and the subject collides with a collision body, and separates the arm pair from each other against the elastic force of the elastic member. ,
A drop impact test apparatus characterized by comprising:   The elevating means includes a guide body composed of a support, an elevating plate that can be moved up and down along the guide body, an elevating drive mechanism that drives the elevating plate to move up and down, and the holding means provided on the elevating plate to detach from the elevating means. The drop impact testing apparatus according to claim 1, further comprising a hanging mechanism.   The holding means, the elevating means, the collision body, and the restraint releasing means are all surrounded by a cover body. The cover body has an opening for attaching the subject to the holding means, and the drop impact test is completed. 2. A drop impact test apparatus according to claim 1, wherein openings for picking up the subject are provided, and the openings are provided with detecting means for detecting the intrusion of an object. An installation base is provided, which faces the opening for attaching the subject of the cover body to the holding means and places the subject on the subject so that the mounting posture of the holding means relative to the subject is constant. The drop impact test device according to claim 3 .

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