JP3836585B2 - Impact test equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an impact test apparatus that mounts a subject and performs an impact test by dropping.
[0002]
[Prior art]
Conventionally, in order to measure the impact generated on a subject such as a product, granule, granule, etc., the subject is manually held and lifted to a predetermined height, and then the subject is released and released freely. It was made to collide with an impact table that is a collision body .
[0003]
Moreover, the impact test of the test subject was sometimes performed using the impact test apparatus. This impact test apparatus has a holding means for holding a subject. This holding means has a configuration in which the subject is placed on the upper portion or a configuration in which the subject is fixedly attached below.
[0004]
The holding means is guided to slide in the vertical direction by a guide body such as a rail. For this reason, during the impact test, the holding means falls in a constant posture by the guide of the guide body, so that the subject held by the holding means also drops while maintaining a constant posture.
And the fixed impact stand is provided in the lower end side of the said guide body, and it has the structure which collides with this impact stand with the said holding means.
[0005]
[Problems to be solved by the invention]
By the way, as described above, when the subject is held manually and dropped freely, the reproducibility of the collision of the subject is low.
That is, when the subject is freely dropped, the subject often rotates because the posture of the subject cannot be supported at all. This is because it is difficult to release the load evenly from the subject in the case of manual holding.Therefore, there is a time error in the release timing at each holding position at the time of releasing the holding from the subject. This is because rotation that causes change and posture change occurs.
[0006]
In particular, when the distance to be dropped becomes long, the influence of the posture change due to such rotation becomes remarkable.
For this reason, in the impact test of a subject, it is difficult to perform an impact test in a desired posture.
[0007]
Further, when the impact test apparatus as described above is used, the posture at the time of collision of the subject can be maintained constant, and it is possible to perform an impact test in a desired posture. However, in the configuration in which the subject is placed on the upper part of the holding means, the collision of the subject with the impact table can only be measured indirectly through the holding means. That is, the holding means on which the subject is placed receives an impact first, and then the impact propagates through the holding means to the subject.
[0008]
For this reason, the collision of the subject can be performed only by an indirect impact test, and thus the appearance is different from the test in which the subject is directly collided with the impact table.
In addition, when an impact test is performed with the subject fixedly attached below the holding means, after the subject first collides with the impact table, the holding means is moved from above the subject due to inertia at the time of dropping. Kinetic energy from falling is applied. For this reason, the aspect is different from the case where the subject collides alone, and a state in which the subject collides by applying more energy.
[0009]
Thus, in the conventional impact test apparatus, the re-visibility of the situation at the time of collision is low, and an accurate impact test cannot be performed.
The present invention has been made based on the above circumstances, and an object of the present invention is to provide an impact test apparatus capable of performing an impact test by a drop with quantitative and high reviewability.
[0010]
In order to solve the above problems, the invention described in claim 1 has a holding means for holding the subject, and a guide body that guides the holding means provided to be relatively displaceable to the collision body. In the impact test apparatus that applies an impact to the subject by causing the subject to collide with the colliding body, the holding means is provided so as to be separated and opposed in a direction intersecting the direction in which the subject is displaced. And a locking means attached to the counter member and having a fixed arm and a rotating arm connected to the fixed arm, and when the subject collides with the collision body, the test An impact test apparatus characterized by being a holding means for releasing the body .
[0011]
The invention according to claim 2 has a holding means for holding the subject and a guide body that guides the holding means provided to be relatively displaceable to the collision body, and the subject is made relative to the collision body. In the impact test apparatus that applies impact to the subject by displacing the subject, the holding means includes a facing member provided to be opposed to and spaced apart in a direction intersecting the direction in which the subject is displaced, and the facing member. attached to, and a locking means having a fixed arm and pivot arm which is pivotally connected to the fixed arm, the tip of the rotating arm is provided so as to point contact to the subject An impact test apparatus characterized by being a holding means for releasing the holding when a subject collides with the collision body .
[0012]
The invention described in claim 3 has a holding means for holding the subject and a guide body for guiding the holding means provided to be relatively displaceable to the collision body, and the subject is made relatively to the collision body. In the impact test apparatus that applies impact to the subject by displacing the subject, the holding means includes a facing member provided to be opposed to and spaced apart in a direction intersecting the direction in which the subject is displaced, and the facing member. attached to, and a locking means having a fixed arm and pivot arm which is pivotally connected to the fixed arm, the tip of the rotating arm is provided to be in line contact with the subject An impact test apparatus characterized by being a holding means for releasing the holding when a subject collides with the collision body .
[0013]
According to a fourth aspect of the present invention, the locking means holds the subject in a state where the fixed arm and the rotating arm are extended, and in this case, the rotating arm rotates downward from the extended state. claims 1, characterized by comprising regulating means for regulating the in the range of impact testing apparatus according to claim 3, wherein.
[0014]
A fifth aspect of the present invention is the impact test apparatus according to any one of the second to fourth aspects, wherein the mounting position of the locking means to the opposing member is adjustable.
[0015]
Invention of claim 6, wherein said locking means is a shock test device according to any one of claims 1, characterized in that the mounting is adjustable in length according to claim 5 from the opposing member .
[0016]
According to a seventh aspect of the present invention, an impact absorbing means for absorbing the kinetic energy of the slide body is provided in the vicinity of the guide body after the subject collides with the colliding body . The impact test apparatus according to any one of claims 1 to 6, wherein
[0018]
According to the invention of claim 1 , since the holding means is a holding means for releasing the holding of the subject when the subject collides with the collision body, the impact test of the subject to the collision body is performed in a desired posture. It is possible to carry out while maintaining. In addition, because it is configured to release the holding when the subject collides with the colliding body, the influence of the external force hardly acts on the subject at the time of the collision, so the impact test is highly quantitative and should be performed quantitatively. Can do.
[0019]
According to a second aspect of the present invention, the holding means includes a facing member provided to be spaced apart and facing in a direction orthogonal to the direction in which the subject is displaced, and is attached to the facing member. It is comprised from the latching means which consists of the rotation arm connected so that it can move freely, and since the front-end | tip of this rotation arm is provided so that a point contact may be carried out to the said test subject, When the tip of the rotating arm is released from the holding state of the subject by collision with the subject, it does not interfere with the subject.
[0020]
According to the invention of claim 3, since the tip of the rotating arm is provided so as to be in line contact with the subject, it is possible to hold the subject by dispersing the holding force of the subject. ing.
[0021]
According to a fourth aspect of the present invention, the locking means holds the subject with the fixed arm and the rotating arm extended, and in this case, the rotating arm rotates downward from the extended state. Therefore, when the subject collides with the collision body, the rotating arm is surely rotated upward. It is possible to release this subject by moving it.
[0022]
According to the invention of claim 5, since the attachment position of the locking means to the opposing member can be adjusted, it is possible to perform appropriate holding according to the size and shape of each subject. ing.
[0023]
According to the invention of claim 6, since the locking means can adjust the mounting length from the facing member, it is possible to appropriately hold even if the size and shape of the subject changes. It has become.
[0024]
In addition, by adjusting the mounting length from the opposing member in this way, it is possible to procure the mounting posture of the subject to a desired posture.
According to a seventh aspect of the present invention, shock absorbing means for absorbing the kinetic energy of the slide body is provided in the vicinity of the guide body after the subject collides with the colliding body . Therefore, it is possible to prevent damage to the slide body.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The impact test apparatus 10 has a base 12 that is substantially flat and has a plurality of legs 11 provided below. The base 12 has a predetermined strength in order to perform a good test even when an impact is applied during an impact test.
[0026]
A column 13 is erected on the base 12 so as to extend upward in the vertical direction. A reinforcing member 14 is attached to the support column 13 at a predetermined angle to guide and reinforce the vertical installation of the support column 13 with respect to the base 12. In the impact test apparatus 10 shown in FIG. 1, the reinforcing member 14 is attached only in the semicircular direction on one side with the column 13 as the center, and the reinforcing member 14 is used for performing the impact test in the other semicircular direction. Is not provided.
[0027]
A guide body 15 such as a linear rail is provided on one side surface of the support column 13 where the reinforcing member 14 is not provided.
A holding jig 16 is slidably guided along the guide body 15 by the guide body 15. The holding jig 16 has, for example, a hook-shaped locking mechanism 17 in order to prevent it from falling off the guide body 15, and can be freely slid along the guide body 15. ing. Between the guide body 15 and the locking mechanism 17, for example, a structure such as a bearing that hardly causes friction may be provided so as not to generate friction.
[0028]
The configurations of the guide body 15 and the locking mechanism 17 are not limited to this, and any configuration may be used as long as it can freely slide in the vertical direction. .
[0029]
As shown in FIG. 2, the holding jig 16 has a jig base 18 formed in a flat plate shape, for example, and a locking mechanism 17 is attached to the guide body 15 side of the jig base 18. To constitute a slide body. A pair of projecting members 19, which are opposing members spaced apart from each other by a predetermined distance, are attached to the surface of the jig base 18 opposite to the locking mechanism 17. The protruding member 19 is attached so as to be substantially parallel to the support column 13. Further, the projecting member 19 is formed with a guide groove 20 penetrating in the thickness direction. In the present embodiment, the guide groove 20 has a configuration in which a pair of horizontal grooves 20a formed substantially parallel to each other and a vertical groove 20b connecting them are connected in a U-shape.
[0030]
In addition, the shape of the guide groove 20 is not restricted to the above-mentioned case, For example, you may form in T shape or a fence shape. In addition to the groove shape, for example, a configuration in which a hole shape or a recess capable of fitting the claw member 21 at a predetermined interval may be provided.
[0031]
The guide groove 20 is provided with a claw member 21 as a locking means so as to be movable along the guide groove 20. As shown in FIG. 3, the claw member 21 includes a fixed arm 22 fixedly provided on the projecting member 19 and a rotary arm connected to the fixed arm 22 via a rotary shaft 23. 24.
[0032]
The projecting member 19 and the claw member 21 constitute a holding unit that holds a subject 27 described later.
A screw portion 25 is formed by a predetermined length at a position opposite to the side on which the rotation shaft 23 of the fixed arm 22 is provided. The screw portion 25 has a diameter that can be inserted into the guide groove 20.
[0033]
After inserting the screw portion 25 into the guide groove 20, the claw member 21 is locked and fixed to the protruding member 19 by, for example, sandwiching the protruding member 19 with two nuts to which the screw portion 25 is screwed. It is like that.
[0034]
In addition, you may apply the structure and method other than this for the latching fixation of the nail | claw member 21 to the said protrusion member 19. FIG.
One end side of the rotation arm 24 is rotatably connected to the rotation shaft 23 on one end side of the fixed arm 22. The rotating arm 24 is provided with a locking claw 26 having a pointed tip formed on the other end side. Therefore, the locking claw 26 holds the subject 27 by point contact. Therefore, when the rotating arm 24 opens through the rotating shaft 23, the opening of the subject 27 is performed smoothly without being hindered.
[0035]
A stopper 28 serving as a restricting means is formed below one end of the rotating arm 24. The stopper 28 is formed by extending an outer surface side below the one end side of the rotating arm 24 by a predetermined length, and the inner peripheral side of the stopper 28 abuts on the outer surface of the fixed arm 22. The rotation arm 24 is restricted from rotating downward.
[0036]
The stopper 28 is provided to restrict the rotation at a position where the fixed arm 22 and the rotation arm 24 are substantially linear.
The fixed arm 22 and the rotating arm 24 are each provided with a pin 30 for locking a spring 29 as an elastic member. Two pins 30 are arranged on each side of the claw member 21. Here, when the fixed arm 22 and the rotating arm 24 are extended so as to be in a straight line without being bent, the spring 29 is rotated at the center of rotation of the rotating shaft 23 as shown in FIG. The position of the pin 30 is set at such a position as to reach the position.
[0037]
Therefore, when the rotating arm 24 extends without bending with respect to the fixed arm 22, the claw member 21 generates a predetermined spring force according to the extension. However, since the spring 29 extends so as to reach the center of the rotating shaft 23, the force by the spring 29 does not act upward or downward, and is in a balanced state.
[0038]
However, when an external force acts on the locking claw 26 and the rotating arm 24 rotates about the rotating shaft 23 even at a small angle, the force of the spring 29 is shown in FIG. Thus, the rotation arm 24 is instantaneously rotated.
[0039]
Here, in order to stably hold the subject 27, the turning arm 24 is turned with respect to the fixed arm 22 so as to be shifted downward by a minute angle, and the subject 27 is held in this state. It does not matter as a structure to do.
[0040]
In the present embodiment, two claw portions 21 are arranged on each projecting member 19.
An impact base 31 as a collision body is attached to the base 12. The impact table 31 is located on the lower end side of the guide body 15, and the upper surface has a larger area than the subject 27 and is formed in a flat plate shape. It is possible to collide with.
[0041]
The impact table 31 is made of a material having higher rigidity than that of the subject 27, and can be repeatedly and satisfactorily tested with respect to another subject 27.
[0042]
However, instead of the impact table 31, another subject 27 or a completely different collision object may be installed at this position for collision.
The impact table 31 is attached to the guide body 15 with a predetermined gap, and a shock absorber 32 for buffering the impact of the holding jig 16 is attached to the gap.
[0043]
The operation of the impact test apparatus 10 having the above configuration will be described below.
When performing an impact test by dropping, it is necessary to attach the subject 27 to the holding jig 16. Therefore, the arrangement of the claw member 21 in the guide groove 20 is adjusted in accordance with the shape and size of the subject 27, and the rotating arm 24 is extended with respect to the fixed arm 22 to be in a straight line. Set to.
[0044]
Thereafter, the holding posture of the subject 27 is adjusted by screwing the claw member 21 and adjusting the protruding lengths.
After the subject 27 is attached to the holding jig 16, the holding jig 16 is moved upward along the guide body 15 and lifted to an appropriate height, and then the holding jig 16 is released. Drop it. This state is shown in FIG.
[0045]
Then, the subject 27 is caused to collide with the impact table 31. When a force acts on the locking claw 26 due to the collision of the subject 27 with the impact table 31, the pivot arm 24 is moved to the pivot axis. Rotate a predetermined amount around 23. That is, the fixed arm 22 and the rotating arm 24 are displaced from the straight line by a predetermined angle.
[0046]
Then, despite the fact that the spring 29 is extended between the fixed arm 22 and the rotating arm 24, the balance is broken and shifted from the balanced state without being displaced. As a result, the rotating arm 24 is instantaneously rotated. Therefore, the holding of the subject 27 by the locking claw 26 is also instantaneously released, so that the collision of the subject 27 hardly affects the holding of the locking claw 26.
[0047]
That is, as shown in FIG. 4B, all the nail members 21 release the holding of the subject 27 at the same time.
The holding jig 16 that has released the subject 27 does not yet lose its kinetic energy and moves downward. However, a shock absorber 31 is placed between the shock table 31 and the guide body 15. A zober 32 is provided, and the holding jig 16 collides with the shock absorber 32 to absorb kinetic energy.
[0048]
Even when the holding jig 16 is rebounded by the shock absorber 32, the rotating arm 24 maintains the bent state with respect to the fixed arm 22 by the elastic force of the spring 29. The rotating arm 24 and the locking claw 27 are difficult to come into contact with the subject 27 after the collision.
[0049]
According to the impact test apparatus 10 having such a configuration, it is possible to perform an impact test in which the subject 27 collides with the impact table 31 while maintaining the subject 27 in a desired posture. For this reason, it is possible to perform an impact test at the intended location of the subject 27.
[0050]
Further, at the moment when the subject 27 collides with the impact table 31, the rotating arm 24 is rotated so as to release the holding of the subject 27 by the elastic force of the spring 29. 26, and consequently, the influence of the holding jig 16 hardly occurs. Therefore, it is possible to perform an impact test similar to the case where the subject 27 is naturally dropped.
[0051]
In this way, the impact test can be performed at the intended location of the subject 27, and the impact test can be performed in a state where almost no external force is applied. Tests can be performed.
[0052]
Further, since the locking claw 26 has a pointed tip and is provided so as to make point contact with the subject 27, when the holding state of the subject 27 is released, the locking claw 26 is locked. The nail | claw 26 is replaced and it does not prevent the cancellation | release.
[0053]
Further, since the stopper 28 for restricting the rotation of the fixed arm 22 and the rotating arm 24 is provided, the holding state of the subject 27 does not become unstable, and the subject 27 is in the middle of the impact test. The problem that the holding is released does not occur. Further, the operation of locking the subject 27 can be easily performed.
[0054]
Further, when the subject 27 collides with the impact table 31, the presence of the stopper 28 allows the turning arm 24 to turn only upward, so that the holding of the subject 27 can be released satisfactorily. It is like that.
[0055]
Furthermore, a guide groove 20 is formed in the protruding member 19, and the size of the subject 27 and the size of the subject 27 can be adjusted by moving the claw member 21 along the guide groove 20 and adjusting the arrangement of the claw member 21. It is possible to hold the subject 27 appropriately according to the shape.
[0056]
Further, the screw portion 25 is formed on the fixed arm 22, and by adjusting the screw portion 25 to be screwed, it is possible to adjust the holding posture according to the shape and size of the subject 27. It is possible. For this reason, it is possible to perform an impact test at an intended location of the subject 27.
[0057]
A shock absorber 32 is provided between the shock table 31 and the guide body 15, and the holding jig 16 collides with the shock absorber 32. Can be absorbed.
[0058]
For this reason, it is possible to prevent the holding jig 16 from crashing into the base 12 and causing damage.
Although one embodiment of the present invention has been described above, the present invention can be variously modified in addition to this. This is described below.
[0059]
In the above-described embodiment, the configuration in which the holding by the locking claw 26 is mechanically released by the elastic force of the spring 29 has been described. It is possible to detect the force acting on the locking claw 26 with a sensor and release it instantaneously.
[0060]
Moreover, in the said embodiment, although the structure of the nail | claw member 21 has the latching claw 26 which hold | maintains the test subject 27 by point contact, it is set as the structure which hold | maintains test subject 27 by line contact irrespective of point contact. It doesn't matter. In this case, as shown in FIG. 5, the contact body 33 is provided at the tip of the rotating arm 24. The contact body 33 is, for example, a metal cylinder and a ring made of rubber or resin. A body is fitted, and this is configured to hold the subject 27 in line contact.
In addition, various modifications can be made without departing from the scope of the present invention.
[0061]
【The invention's effect】
As described above, by using the impact test apparatus and impact test method of the present invention, impact reproducibility can be obtained satisfactorily and experiments can be conducted quantitatively.
[Brief description of the drawings]
1A and 1B are diagrams showing a configuration of an impact test apparatus according to an embodiment of the present invention, in which FIG. 1A is a front view and FIG. 1B is a side view;
FIG. 2 is a perspective view showing a configuration of a holding jig according to the embodiment.
FIGS. 3A and 3B are side views showing a configuration of a claw member according to the embodiment, wherein FIG. 3A is an extended state and FIG. 3B is a bent state.
FIGS. 4A and 4B are diagrams showing a relationship between a subject and a nail member according to the embodiment, where FIG. 4A is a state in which the subject is held, and FIG. 4B is a state in which the state of holding the subject is released. FIG.
FIG. 5 is a perspective view showing a configuration of a holding jig according to a modified example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Impact test apparatus 12 ... Base 13 ... Support | pillar 14 ... Reinforcement member 15 ... Guide body 16 ... Holding jig 19 ... Projection member 20 ... Guide groove 21 ... Claw member 22 ... Fixed arm 23 ... Rotating shaft 24 ... Rotation Arm 25 ... Screw part 26 ... Locking claw 27 ... Subject 28 ... Stopper 29 ... Spring 31 ... Shock table 32 ... Shock absorber 33 ... Contact body

Claims (7)

A holding means for holding the subject, and a guide body that guides the holding means provided to be relatively displaceable to the collision body, and by causing the subject to be relatively displaced with respect to the collision body to collide, In the impact test apparatus for impacting the subject,
The holding means includes an opposing member provided to be spaced apart in a direction intersecting the direction in which the subject is displaced, a fixed arm and a rotating arm connected to the fixed arm. The impact test apparatus is a holding means for releasing the holding of the subject when the subject collides with the collision body. A holding means for holding the subject, and a guide body that guides the holding means provided to be relatively displaceable to the collision body, and by causing the subject to be relatively displaced with respect to the collision body to collide, In the impact test apparatus for impacting the subject,
The holding means includes a facing member provided to be spaced apart from each other in a direction intersecting with the direction in which the subject is displaced, and a rotation that is attached to the facing member and is rotatably connected to the fixing arm. And a holding means for releasing the holding when the subject collides with the colliding body, provided that the tip of the rotating arm is in point contact with the subject. An impact test apparatus characterized by that. A holding means for holding the subject, and a guide body that guides the holding means provided to be relatively displaceable to the collision body, and by causing the subject to be relatively displaced with respect to the collision body to collide, In the impact test apparatus for impacting the subject,
The holding means includes a facing member provided to be spaced apart from each other in a direction intersecting with the direction in which the subject is displaced, and a rotation that is attached to the facing member and is rotatably connected to the fixing arm. And a holding means for releasing the holding when the subject collides with the colliding body, provided that the tip of the rotating arm is in line contact with the subject. An impact test apparatus characterized by that.   The locking means includes a restricting means for holding the subject in a state where the fixed arm and the rotating arm are extended, and in this case, restricting the rotating arm from rotating downward from the extended state. 4. The impact test apparatus according to claim 1, wherein the impact test apparatus is characterized in that:   The impact test apparatus according to any one of claims 1 to 4, wherein the locking means is adjustable in an attachment position to the facing member.   6. The impact test apparatus according to claim 1, wherein the locking means is capable of adjusting a mounting length from the facing member.   2. An impact absorbing means for absorbing the kinetic energy of the slide body after the subject collides with the colliding body is provided in the vicinity of the guide body. The impact test apparatus according to any one of claims 6 to 6.

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