JP2003156421A - Testing device for drop impact test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a testing device for drop impact test with which a test of high reproducibility can be efficiently conducted by applying a drop impact while holding a specimen in the same posture all the time, which is high in the rigidity of device itself, which can secure the durability over use of a long period, and which can enhance the reliability. SOLUTION: This testing device is provided with a mounting mechanism 6 for mounting the specimen S, a guide member 2 for elevation-guiding the mounting mechanism, an elevation mechanism 4 for elevating the mounting mechanism to a prescribed dropping height along the guide member to be dropped from a position of the height, and a collision body 8 arranged in a lower end part of the guide member to be collided with the dropped specimen. The mounting mechanism above-mentioned comprises a mounting plate body 7 wherein plate face directions in a plurality of rail members 17 are directed vertically and juxtaposed with a prescribed space each other, and wherein spatial slits 20 are formed between the mutual rail members to mount the specimen. The collision body comprises a plurality of collision molecule bodies 21 having a clearance allowing passing-through of the rail members and juxtaposed in a portion opposed to the slits.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop impact test apparatus for observing a degree of destruction of a subject due to a drop impact caused by dropping a subject from a predetermined height to collide with a colliding body.

[0002]

2. Description of the Related Art For example, when a new product or new component is developed, it is dropped as a test object from a predetermined height to collide with a collision object, and the degree of destruction due to the drop impact is observed. I am making an evaluation.

In this type of drop impact test, an operator first held a subject in his hand and allowed the subject to fall freely from a predetermined height. If this test is repeated, not only the work load becomes poor for the worker but also the workability is not good, and the posture when the subject collides with the collision target is not constant, and the evaluation of the drop strength differs each time and it is reliable. The sex is bad.

Therefore, a drop impact test apparatus has been developed in which the posture of a dropped subject when it collides with a collision target is always kept constant. For example, as shown in FIG. 8, by pressing the nail a from both sides of the subject S,
A gripping mechanism A for gripping the subject S is provided, and this gripping mechanism A
There is a drop impact test device in which the object S is lifted up to a predetermined height along the guide body B, and the gripping mechanism A is naturally dropped from here to collide the subject S with the colliding body C arranged below the guide body B.

The gripping mechanism A is controlled so as to open the subject S immediately before the subject S collides with the colliding body C, and the posture of the subject S does not change at all and the drop impact is always performed in the same posture. It is highly reliable because it receives it.

However, since the subject S is gripped by pressing the claw portions a from both sides of the subject S, when the mass of the subject S increases, the gripping force (holding force) is correspondingly increased. It must be done, and the mechanism becomes large and complicated. Repeated drop impact test,
The gripping mechanism A is left with the influence of dropping, and the durability is easily impaired.

[0007]

Therefore, a drop impact test apparatus as shown in FIG. 9 has been proposed. This assumes a notebook personal computer as the subject S.
That is, the mounting plate D is attached to the guide body E so as to be able to move up and down while the plate surface is set vertically. On the plate surface of the mounting plate D, a support F made of two round bar members is attached in parallel at a predetermined interval and protrudes in the horizontal direction.

The subject S is mounted with the corners dropped between these supports F, and is supported in an inclined state. A colliding body G is arranged below the guide body E, and when the mounting plate D is dropped along the guide body E, the subject S collides with the colliding body G from a corner.

According to such a drop impact test apparatus, the test subject S can be supported very simply regardless of the mass of the test subject S, the method of use is simple, and a highly reproducible test can be performed. Furthermore, the support mechanism (support F) of the subject S is simplified,
It is easy to design and manufacture and can be offered at a low price.

However, since a round bar is used as the support F, the contact between the support F and the test subject S is point contact in front view and line contact in side view, so that the test subject when dropped The stability of S is poor.

It is conceivable to restrain the subject S by providing a band for stabilizing the support of the subject S, but it is difficult to attach the band to the support F and the mounting plate D, and the subject S is actually restrained. The work becomes troublesome.

As a drop impact test, there is a specification that not only the corners of the subject S collide with the colliding body, but also the entire surface of the subject S collides with the colliding body G. At this time, the support F
The subject S is placed thereon, the subject S is placed in a horizontal posture, and the entire surface is collided with the colliding body G.

However, the collision body G must be provided with a slit through which the support body F passes so that only the subject S collides with the collision body G. In order to make the entire surface of the subject S to collide with the colliding body as much as possible, it is preferable that the slit provided in the colliding body G is narrow, and thus the diameter of the support body F is thin.

The support F that is most suitable for supporting the subject S in a horizontal posture has a small diameter, but the strength of the support F itself decreases. Moreover, since it has a so-called cantilever structure in which only one end is attached to the mounting plate D, it may not be possible to support a drop impact test for a subject S having a larger mass, and the selection range is narrow.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to maintain a subject in the same posture at all times so as to receive a drop impact, which is highly reproducible. It is an object of the present invention to provide a drop impact test device that can perform tests efficiently, has high rigidity of the device itself, ensures durability over long-term use, and can improve reliability.

[0016]

In order to satisfy the above object, the present invention provides, as a first means, a mounting means for mounting a subject, a guide means for vertically guiding the mounting means, and a guide means along the guide means. In the drop impact test apparatus, which comprises an elevating means for lifting the mounting means to a predetermined height and dropping it from that position, and a collision body which is arranged at the lower end portion of the guide means and collides with the dropped subject. The means includes a plurality of support members arranged in parallel with each other at intervals.
It is composed of a mounting plate on which a subject is mounted, and the collision body has a gap through which the support member passes.

As a second means, the above-mentioned mounting plate body is provided with a pair of holders provided over the side end portions of the supporting member, bearing holders are provided in these holders, and the guide means is a bearing portion. Consists of columns that are slidably fitted.

As a third means, the support member is a plate-shaped crosspiece, and the holder is provided with a locking portion for locking the crosspiece end from the upper surface to the vicinity of the lower surface.

As a fourth means, the mounting means, the guide means, the elevating means and the collision body are all housed in a housing, and the housing has an opening necessary for the work of putting in and taking out the test object. A door body that opens and closes the opening and a drop prevention mechanism that prevents the mounting means and / or the lifting mechanism from falling when the door body is opened are provided.

As a fifth means, the mounting means has a support mechanism for supporting the subject in a predetermined posture without restraining it.

As a sixth means, the support mechanism includes a receiving portion provided on the upper surface of the mounting plate for receiving one end corner of the subject in an inclined state, and another end portion of the inclined subject. Consisting of a support for supporting.

As a seventh means, the support comprises an arm having a joint, and a roller made of a smooth material which is provided at the tip of the arm and receives the lower surface of the other end of the subject.

By adopting the means for solving such a problem, the subject can be always held in the same posture and subjected to a drop impact, a highly reproducible test can be efficiently performed, and the device itself can be tested. High rigidity ensures durability over long-term use.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the drop impact test device. Reference numeral 1 in the figure is a bottom plate having a rectangular shape in a plan view and having a predetermined plate thickness. On both left and right sides of the bottom plate 1, guide bodies (guide means) 2 composed of columns are erected so as to face each other.

A ceiling plate 3 is provided over the upper ends of the guide bodies 2. The ceiling plate 3 has the same outer dimensions as the bottom plate 1 and has a minimum thickness necessary for reducing the weight of the entire apparatus.

Guide body 2 between the bottom plate 1 and the ceiling plate 3
Includes an elevating body 5 that constitutes an elevating mechanism (elevating means) 4,
A mounting plate body 7 that constitutes the mounting mechanism (mounting means) 6 is mounted so as to be movable up and down. A collision body 8 is arranged on the bottom plate 1 between the guide bodies 2.

The elevating mechanism 4 will be further described. The elevating body 5 is a plate body having substantially the same outer dimensions as the ceiling plate 3. The elevating body 5 is provided with a bearing portion (not shown) that is slidable with respect to the guide body 2.

At the center of the ceiling plate 3, there is installed a lifting / lowering body hoisting motor 10 for forward / reverse rotation drive, and one end of a wire 11 is fixedly mounted and wound on the rotary shaft of the motor. . The wire 11 extends vertically, and the lower end is wound around a pulley (not shown) attached to the side surface of the lifting body 5.

From this, the wire 11 is wound around the rotating shaft of the motor 10 by, for example, the normal rotation driving of the motor 10, and the elevating body 5 moves upward along the guide body 2.
Further, the wire 11 is fed out from the motor side by the reverse drive of the motor 10, and the elevating body 5 is moved downward along the guide body 2.

A coupling motor 12 that is driven to rotate in the forward and reverse directions is mounted on the lifting body 5. This coupling motor 12
Is a biaxial motor in which the rotary shaft 12a extends left and right,
The bearing plate 12b supports the middle part of the rotating shaft.

Further, one end of the coupling hook 13 is fitted to the end of the rotary shaft 12a protruding from the bearing plate 12b. The coupling hook 13 projects downward in the drawing, passes through the notch K provided from the end edge of the lifting body 5, and projects downward from this lower surface.

The lower end of the coupling hook 13 protruding from the lower surface of the lifting body 5 is provided with a hook portion 13a which is cut out from the edge thereof. Coupling motor 12
Is configured to rotate the coupling hook 13 from the illustrated position to the front side to displace the hook portion 13a to a position where the hook portion 13a comes out of the cutout portion K of the elevating body 5.

The above-mentioned coupling hook 1 on the mounting plate 7
A support plate 14a on which the pin 14 is projected is provided upright at a position where the plate 3 and the plate surface are substantially joined. With the components assembled, the hook portion 13a of the coupling hook 13 engages with the pin 14 of the support plate 14a.

When the coupling hook 13 rotates to come out of the notch K, the hook 13a comes out of the pin 14.
That is, with the forward and reverse rotation of the coupling motor 12,
The hook portion 13a can be hooked on and removed from the pin 14.

The lifting mechanism 4, the lifting body 5, the lifting body winding motor 10, the wire 11, the coupling motor 12, the coupling hook 13, the pin 14, and the like described above constitute the lifting mechanism 4.

The mounting mechanism 6 will be further described. The above-mentioned mounting plate 7 is provided with holders 15 on both sides, is installed between both side surfaces of these holders 15, and is a connecting crosspiece for connecting and fixing the holders 15 to each other. 16 and these connecting crosspieces 1
A plurality of (here, three) mounting crosspieces (support members) 17 are provided inside the holder 6 between the holders 15.

Therefore, since the mounting plate 7 is composed of an assembly of a plurality of holders 15, a connecting bar member 16 and a mounting bar member 17, a test object to be mounted on it while maintaining sufficient strength. Even if the weight of S is quite large, it can surely endure.

Each of the holders 15 is a plate body formed in a rectangular shape in a plan view, and is provided with a bearing portion 18 slidably fitted in the guide body 2. The bearing portion 18 is provided to reduce sliding resistance with respect to the guide body 2.

The outer dimensions of the holder 15 in the state of being connected by the connecting bar 16 are set to be the same as the outer dimensions of the ceiling plate 3 and the lifting body 5. Above-mentioned mounting crosspiece 17
Has a plate thickness of about 3 mm, has an appropriate plate surface width dimension, and has required strength.

The engaging portion 1 is provided on the ends of the holder 15 facing each other.
9 is provided, and the end of the mounting rail 17 is locked there. The locking portion 19 is provided from the upper surface to the middle portion of the lower surface of the holder 15, the width dimension is the same as the plate thickness of the mounting rail 17, and the depth dimension is the same as the plate width of the mounting rail 17. Or it is designed to be shallower than this.

In the above-mentioned mounting rail 17, the plate thickness direction is oriented horizontally, the plate surface is erected in the vertical direction, and both end portions are in the holder 15.
It is dropped from the upper surface into the notch that is the locking portion 19. The upper end surfaces of all the mounting crosspieces 17 are the same as the upper surface of the holder 15 or the same plane projecting from the upper surface, and the mounting crosspieces 17 are arranged side by side at a predetermined interval.

In a plan view of such a mounting plate body 7,
The left and right are between the holders 15, the front and rear are between the mounting rails 17, and the mounting rails 17 and the connecting rails 16 are called space slits 20. All the space slits 20 have the same shape and dimension.

Since the mounting crosspieces 17 are only dropped and locked in the locking portions (notches) 19 of the holder 15 from above, the crosspieces 17 are moved from the top to the bottom. Even if the force is applied to the side, the position of the crosspiece 17 does not change at all, but if the force is applied from the lower part of the crosspiece 17 to the upper side, the crosspiece 17 easily comes out of the locking portion 19.

On the other hand, the collision body 8 is composed of a plurality of collision molecular bodies 21 formed of, for example, concrete plate bodies. The collision molecular bodies 21 are arranged side by side with a gap through which the members constituting the mounting plate body 7 pass.

That is, the plan view shape of the collision molecular body 21 is narrower in the left-right direction than between the holders 15 and in the front-back direction between the mounting bars 17 and between the mounting bars 17 and the connecting bars. It is narrower than between the materials 16.

The collision molecular body 21 is juxtaposed in a position facing the space slit 20 formed in the mounting plate body 7, and is formed slightly smaller (about 1 mm on each side) than the space slit 20. The height dimension of the collision molecular body 21 depends on the mounting plate body 7.
It is set sufficiently higher than the total size of the plate and the size of the height of the shock absorber 22 described later.

From this, when the mounting plate 7 descends and reaches the lower end of the guide body 2, the space slit 20 of the mounting plate 7 is inserted into the collision molecular body 21, and the mounting plate 7 is moved. Directly
It does not collide with the colliding body 8.

Since the collision body 8 is placed and fixed on the bottom plate 1, it can be replaced with a different collision body 8 if necessary, and conforms to the test standard regarding the shape and material of the collision body 8. What you can do is one of the features.

The shock absorber 22 is a shock absorbing damper composed of, for example, a hydraulic cylinder. Although it is arranged on the right side of the collision body 8 in the figure, it is actually arranged also on the left side. Each of the shock absorbers 22 is provided at a position to stop when the mounting plate 7 descends to the lower end portion of the guide body 2, and absorbs the shock received by the mounting plate 7.

FIG. 2 assumes that the subject S is, for example, a notebook type personal computer having a weight of 1 to 3 kg, and the placing plate 7 is used when it collides with the colliding body 8 in a plane.
The state where the subject S is placed on the upper side is shown.

The outer dimensions of the subject S in plan view are narrower on the left and right sides than the space between the holders 15 and wider than the space between the mounting bars 17 mounted on the most front and rear sides, and are connected on both sides. This is a case where the crosspieces 16 are narrower than each other.

As the subject S, one to be mounted on at least two mounting rails 17 must be selected. Further, the mounting crosspiece 17 located therein can be taken out, if necessary.

Further, the holder 15 is provided in advance with a large number of locking portions 19 at a narrow pitch, and the position of the mounting crosspiece 17 is changed each time according to the outer shape of the subject S, and it is always 2
The subject S may be placed on the mounting rail 17 for books.

In this case, the shape of the space slit 20 is also changed, but this changed space slit 2
It goes without saying that the shape or the position of the collision molecular body 21 forming the collision body 8 is changed according to 0.

In other words, the test piece is placed on a plurality of mounting bars 17, and the left and right are narrower than the spaces between the holders 15 and the front and back are narrower than the spaces between the connecting bars 16 in a plan view. If S, the drop impact test can be performed regardless of the shape size.

FIG. 3 is a schematic front view of the drop impact test device. A housing is provided over the bottom plate 1 and the ceiling plate 3, and plate members are provided on both sides and the back surface of the housing except the front surface of the housing 23.
Is configured. The guide body 2 described above, the lifting mechanism 4,
The mounting mechanism 6 and the collision body 8 are all housed in the housing 23.

The front surface of the casing 23 is partitioned into upper and lower parts by a partition bar 24 provided at a substantially middle portion in the vertical direction, and openings are formed in the upper and lower parts of the partition bar 24, respectively. And, in the upper and lower openings, shown by broken lines in the figure,
Left and right doors 25, 26 are provided.

The upper door 25 is mounted on the mounting plate 7 and the subject S
The lower door 26 is used when the subject S that has undergone the drop impact test is taken out. Further, a lock mechanism (not shown) is provided on each of the upper and lower door bodies 25 and 26.

The lock mechanism releases the lock only when the mounting plate 7 is at the position where the subject S is mounted or when the mounting plate 7 is on the collision absorber 22. Two
5 and 26 can be opened.

When the mounting plate body 7 is in all other states, the lock mechanism operates to lock the door body. That is, the doors 25 and 26 cannot be opened at all while the mounting plate 7 is being moved up and down, so that safety is ensured.

In particular, a drop prevention mechanism 27, which will be described later, is provided at the upper end of the lower door 26. FIG. 4 (A) shows
FIG. 4B shows the fall prevention mechanism 27 in the state where the lower door body 26 closes the opening in a plan view of the lower door body 26.
Shows a fall prevention mechanism 27 in a state where the lower door body 26 has an opening opened.

One side of the lower door body 26 is locked to the door support shaft 28 so that the door body 26 is rotatably supported. One end of a stopper body 29 is rotatably supported on the door support shaft 28. A link member 30 is installed between a portion of the stopper body 29 in the vicinity of the door support shaft 28 and an end portion of the lower door body 26 in the vicinity of the door support shaft 28, and these constitute a fall prevention mechanism 27.

With the lower door body 26 closing the opening, the stopper body 29 projects into the housing 23 at an angle of approximately 90 degrees with the lower door body. And the stopper body 29
Is separated from the side edge of the projected area T of the mounting plate body 7 and the lifting body 5, and is in a position in close contact with the inner side surface of the housing 23 not shown here.

When the lower door 26 is opened, the stopper 29 is rotated via the link member 30. However,
Due to the existence of the link member 30, the rotation angle of the stopper body 29 is only a fraction of the rotation angle of the lower door body 26. With the lower door body 26 completely opened, a part of the stopper body 29 is positioned within the projected area T of the mounting plate body 7 and the lifting body 5.

While the lower door body 26 is opened and working in the housing 23, the elevating body 5 is lowered for some reason or the elevating body 5 malfunctions to release the coupling of the mounting plate body 7. However, even if the mounting plate body 7 is lowered, the stopper body 29 stops it.

That is, even if the lifting body 5 or the mounting plate 7 is lowered unexpectedly, the lifting prevention mechanism 27 is provided so that the lifting body 5 or the mounting plate 7 can be operated by the operator. There is no contact with and safety is secured.

FIG. 5 shows a control section 31 which accommodates electric parts for controlling the drop impact test device therein.
Operation panels 31a and 31b are provided on the front surface and the top surface.
The control unit 31 is arranged at a position separated from the housing 23 described above, and when the operator mounts the subject S on the mounting plate body 7 and the subject for which the drop impact test is completed. When not taking out S, stand on the front surface of the control unit 31 and
It is in a position away from 3.

That is, due to some malignant circumstances, each door 2
5, 26 suddenly opens, or the subject S opens the door 2
Even if there is a case of breaking through 5, 26 and jumping out of the opening, it does not have any effect on the worker at the separated position, and safety is secured here as well.

The front operation panel 31a and the upper operation panel 31b
Has switches and buttons described below. The front operation panel 31a is provided with a power switch 32, a stop switch 33, an origin confirmation button 34, and an up and down button 35 and a down button 36 in the vertical direction from the leftmost end in the figure to the right. Further, the upper operation panel 31b is provided with drop buttons 37a and 37b on both left and right sides.

The drop impact test device thus constructed is operated as described below. At the beginning of the work, the power switch 32 of the front operation panel 31a is turned on. Next, the adjacent origin confirmation button 33 is pressed. Lifting body 5
Is lowered to the lowest position of the guide body 2, and the current position is confirmed by the lifting body 5 itself.

After that, the coupling motor 12 rotates the coupling hook 13 to engage with the pin 14 on the side of the mounting plate 7 and stop. Therefore, the lifting body 5 and the mounting plate body 7 are
It will be integrated through the coupling hook 13.

Next, the lifting / lowering body winding motor 10 is driven, and the lifting / lowering body 5 moves upward together with the mounting plate 7.
When the mounting plate 7 rises to the position where the subject S is mounted, the lifting body winding motor 10 stops.

The operator confirms this state and confirms this state.
5 is opened, and the subject S is placed on the placing plate 7. As described above with reference to FIG. 2, since it is merely a placement, the work can be performed extremely easily.

After the upper door 25 is securely closed, the up button 35 or the down button 36 is pushed. The elevating body winding motor 10 is driven again to move the mounting plate body 7 together with the elevating body 5 to a predetermined drop height position.

That is, the setting of the drop height position is determined in consideration of conditions such as the mass of the subject S and the sliding resistance of the bearing portion 18 of the mounting plate body 7 with respect to the guide body 2. For the subjects S of different types, the drop height positions are naturally different, so that either the ascending button 35 or the descending button 36 specified in the manual is pressed.

Then, the operator simultaneously presses the pair of drop buttons 37a and 37b on the upper operation panel 31b with both left and right hands. If only one drop button is provided, the worker may unconsciously push it, which may pose a danger to other workers.

Here, both the left and right hands use both drop buttons 3
The switch is not turned on unless 7a and 37b are pressed, and the switch is not turned on when the right and left drop buttons 37a and 37b are pressed at different timings. That is, after confirming the safety, the worker consciously pushes the drop buttons 37a and 37b, and the safety is ensured here as well.

When both drop buttons 37a and 37b are pressed at the same time, the coupling motor 12 is driven in the opposite direction to remove the coupling hook 13 from the pin 14 after a predetermined time (for example, 3 seconds) has elapsed. As a result, the mounting plate 7 is released from the elevating / lowering body 5 and starts dropping while the subject S is mounted.

Since there is no constraint on the mounting plate body 7 described above,
The mounting plate 7 falls by its own weight, but in reality, due to the sliding resistance of the bearing portion 18 provided on the holder 15 with respect to the guide body 2, it falls at a speed slightly lower than the free fall.

Therefore, even if the subject S is not given any restraining force, it falls due to gravity while maintaining a certain posture on the mounting plate 7, and no positional deviation with respect to the mounting plate 7 occurs.

The falling speed is accelerated in accordance with the falling position of the mounting plate 7, and finally the mounting plate 7 reaches the lowermost part of the guide body 2 and collides with the shock absorber 22. Be absorbed. Therefore, the members forming the mounting plate 7 are not damaged at all.

Space slit 2 of mounting plate 7 that has dropped
0 is inserted into the collision molecular body 21 constituting the collision body 8 and the subject S mounted on the mounting crosspiece 17 collides with the collision molecular body 21. Since the mounting posture of the subject S does not change even during the fall, almost the entire lower surface of the subject S collides with the collision molecular body 21 and receives a drop impact.

Next, the lower door 26 is opened and the subject S that has received the impact of falling is taken out. As described above, the fall prevention mechanism 27 functions with the opening of the lower door body 26,
Prevents effects on workers.

After taking out the subject S, the lower door 26
After closing, press down button 36. The lifting / lowering body winding motor 10 is driven to feed out the wire 11, and the lifting / lowering body 5 at a predetermined drop height position is lowered.

When the lifting body 5 descends to the lowest position of the guide body 2 and comes into contact with the mounting plate body 7, the lifting body winding motor 10 is stopped. The coupling motor 12 is driven at a timing so that the coupling hook 13 is engaged with the pin 14. Therefore, the lifting body 5 and the mounting plate body 7 are integrated again.

When the drop impact test is continuously performed, the up button 35 is continuously pressed. The elevating body 5 and the mounting plate body 7 are driven to rise, and stop when the elevating body 5 reaches the mounting position which is the uppermost point. That is, regardless of the type of subject S,
The most suitable position for mounting the subject S on the mounting plate 7 is set.

Next, the upper door 25 is opened and another subject S is placed on the placing plate 7. After this, the work as described above is repeated to perform the drop impact test. Since any subject S maintains a constant posture during the fall and no positional deviation occurs, the subject S can collide with the colliding body 8 with good reproducibility and is highly reliable.

A final drop impact test is performed on the subject S, the subject S is taken out, the elevating body 5 is lowered by pressing the lowering button 36, and after being integrated with the mounting plate 7, it is raised. Press the button 35.

After the elevating body 5 is continuously pressed together with the mounting plate body 7 until the portion directly above the lowest point is reached,
The pushing of the rise button 35 is stopped and stopped, and the start of the next test is awaited. After confirming this state, the worker turns off the power switch 32 to complete all the work.

Thus, the direct work of the worker is
All that is required is to place the subject S on the placing plate 7 and to take out the subject S after the test. All other than that, it is possible to secure safety and improve workability. .

By simply mounting the subject S on the mounting plate 7,
No work such as restraint is required, and no mechanism for that is required. Therefore, the design and manufacture of the drop impact test device is simplified, which helps to reduce the cost, and the work can be performed easily and surely in actual use, and the processing efficiency can be improved.

A plurality of mounting rails 1 constituting the mounting plate body 7
In No. 7, since the plate thickness surface is horizontal and the plate surface is oriented vertically, rigidity is maintained and the slit width of the collision body 8 is narrow, and a larger collision area is secured for the subject S. To do. That is, the collision area of the collision body 8 that is closer to the plane area of the subject S can be formed.

Since the mounting crosspiece 17 is simply dropped into the locking portion 19 provided in the holder 15 from above and locked.
The replacement work can be easily performed when it is deformed due to long-term use.

When the test was carried out without noticing the deformation of the mounting crosspiece 17, when the deformed crosspiece came into contact with the collision molecular body 21 or a foreign substance was placed on the collision molecular body 21. Even if there is, the mounting crosspiece 17 that has come into contact with it only needs to bounce up and come out of the locking portion 19, without adversely affecting other components of the mounting plate body 7.

As shown in FIG. 6, a rubber band 38 may be stretched over the end of the mounting bar 17 of the mounting plate 7 in advance. The locking end of the mounting rail 17 has a rubber band 3
It is elastically restrained by 8 and does not come out easily.

That is, if the mounting crosspiece 17 and the locking portion 19 are loosely fitted, each time the mounting plate 7 is hit by the collision absorber 21, the impact is caused by the impact. 17 is the locking part 1
There is a risk of slipping out of the rubber band 9, and the rubber band 38 is used to regulate this.

FIG. 7 shows the mounting plate 7 and the support mechanism 40 provided on the mounting plate 7. As mentioned above,
When the subject S is to collide with the colliding body 8 in a plane,
Since the subject S is simply placed on the mounting bar 17 of the mounting plate 7, the support mechanism at this time corresponds to the upper surface of the mounting plate 7.

As a drop impact test on the subject S, there is also a specification in which a corner of the subject S is made to collide with the colliding body 8.
At this time, the mounting plate 7 having the supporting mechanism 40 shown in the drawing
Will be used.

The supporting mechanism 40 is composed of a receiving portion 41 provided on the upper surface of the mounting bar 17, which is the upper surface of the mounting plate body 7, and a supporting body 42 attached to the upper surface of the holder 15 in this case. . The receiving portion 41 is a concave portion that is provided so as to match the one end corner portion of the subject S that is inclined.
The one-end corner portion of the subject S refers to a side portion where the bottom surface and the side surface of the subject intersect.

The support body 42 has a support base 43 attached to the upper surface of the holder 15, and has an arm portion 44 rotatably supported by the support base 43. The arm 44 is 1
A roller 46 made of, for example, a synthetic resin material having smoothness is rotatably supported at the tip of the two arms having one joint 45.

In the state where there is an appropriate friction between the pivotal support of the arm 44 with respect to the support base 43 and the joint 45, and the weight of the subject S is applied to the arm 44 via the roller 46. The change in the position and orientation of the arm portion 44 is restricted. However, if the worker applies a force of a predetermined amount or more to the roller 46 or the arm portion 44, the arm portion 4 can be relatively easily operated.
The position and orientation of 4 can be changed.

Since the support mechanism 40 has such a structure, one end corner of the subject S is received by the receiving portion 41 of the mounting rail 17.
By locking the other end on the roller 46 of the support 42, the subject S can always be mounted on the mounting plate 7 in the same tilted posture. Since the roller 46 is made of a smooth material and is rotatably supported by the arm 44, it prevents friction with the subject S while supporting the subject S.

When the mounting plate 7 is dropped, the subject S collides with the colliding body 8 in a predetermined tilt posture. Since one end corners of the subject S are locked to the receiving portion 41, the posture of the subject S does not change during placement as well as during dropping, and the same posture is always maintained and reproducibility is improved. high.

In the above-described embodiment, the motor 10 is used to drive the lifting body 5 and the mounting plate body 7 up and down to operate by electric power, but the invention is not limited to this, and for example, a chain. You may make it operate | move manually by providing a mechanism. In this case, not only the manufacturing cost of the test apparatus can be reduced and the test apparatus can be provided at a low price, but also the test can be performed in a bad condition where electric power cannot be easily obtained.

[0105]

As described above, according to the present invention, it is possible to always hold a subject in the same posture and to receive a drop impact, to efficiently perform a test with high reproducibility, and to test the device itself. The rigidity is high, and durability is ensured over long-term use, and reliability is improved.

[Brief description of drawings]

FIG. 1 is an internal perspective view of a drop impact test device showing an embodiment of the present invention.

FIG. 2 is a perspective view of a mounting mechanism on which a subject is mounted according to the same embodiment.

FIG. 3 is a front view of the drop impact test device according to the same embodiment.

FIG. 4 is a view for explaining a fall prevention mechanism of the same embodiment.

FIG. 5 is a diagram illustrating an operation panel of a control unit according to the same embodiment.

FIG. 6 is a perspective view of a mounting mechanism according to another embodiment.

FIG. 7 is a front view of a support mechanism according to another embodiment.

FIG. 8 is a perspective view of a conventional drop impact test device.

FIG. 9 is a perspective view of a different conventional drop impact test device.

[Explanation of symbols]

S ... Subject, 6 ... Mounting mechanism (mounting means), 2 ... Guide body (guide means), 4 ... Lifting mechanism (lifting means), 8 ... Collider, 17 ... Mounting crosspiece (support member), 20 ... space slit, 7 ... Mounting plate, 21 ... Collision molecule, 15 ... Holder, 18 ... Bearing part, 19 ... Locking part, 27 ... Fall prevention mechanism, 40 ... Support mechanism, 41 ... the receiving part, 42 ... Support, 44 ... arms, 46 ... roller.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideo Tsushima             33, Shinisogo-cho, Isogo-ku, Yokohama-shi, Kanagawa             Inside the Toshiba Production Technology Center F term (reference) 2G061 AA13 AB04 BA01 BA15 CB16                       DA01

Claims (7)

[Claims] 1. Mounting means for mounting a test subject, guide means for guiding the mounting means up and down, and lifting means for lifting the mounting means to a predetermined height along the guide means and dropping it from the position. In the drop impact test device provided with a colliding body which is disposed at the lower end of the guide means and collides with the dropped subject, the mounting means includes a plurality of supporting members arranged in parallel with each other at intervals. A drop impact test device comprising a mounting plate body on which a subject is mounted, wherein the collision body has a gap through which the support member passes. 2. The mounting plate body comprises a pair of holders provided across the side ends of the supporting member, bearing holders are provided on the holders, and the guide means has the bearing portions slidable. The drop impact test device according to claim 1, wherein the drop impact test device comprises a pillar that is movably fitted. 3. The supporting member is a plate-shaped crosspiece, and the holder is provided with a locking portion for locking the end of the crosspiece from the upper surface to the vicinity of the lower surface. 2. The drop impact test device described in 2. 4. The mounting means, the guide means, the elevating means, and the collision body are all housed in a housing, and the housing has an opening necessary for putting in and taking out a test object and the opening. The drop impact according to any one of claims 1 to 3, further comprising: a door body that opens and closes the door, and a drop prevention mechanism that prevents the mounting means and / or the elevating mechanism from falling when the door body is opened. Test equipment. 5. The drop impact test device according to claim 1, wherein the mounting means includes a support mechanism for supporting the subject in a predetermined posture without restraining the subject. 6. The support mechanism is provided on an upper surface of a mounting plate, and supports a receiving portion that receives one end corner of a subject in an inclined state and a other end of the inclined subject. The drop impact test device according to claim 5, wherein the drop impact test device comprises a support. 7. The support comprises an arm having a joint and a roller made of a smooth material which is provided at the tip of the arm and receives the lower surface of the other end of the subject. 6. The drop impact test device according to 6.