JP3190761U - Vibration and impact test equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration / impact test apparatus capable of reproducing both a vibration test and an impact test with one test apparatus, and further enabling both tests to be reproduced at the same time. SOLUTION: A table pedestal 2 installed so as to be able to rise on a device machine frame 1, a mounting table 3 supported on the table pedestal 2 via a coil spring 4, and a mounting table 3 are subjected to vibration. The electric motors 6 and 7 for pushing up and raising the table cradle 2 via the oscillating machine 5 and the power transmission means are provided. The power transmission means are attached to the cams 19a attached to the output shafts 6a and 7a of the electric motors 6 and 7, and attached to the lower surface side of the table cradle 2 to follow the rotation of the cams 19a in the vertical direction along the outer circumference 20 of the cams. It is a cam mechanism 19 composed of a cam follower 19b that detaches and falls from the outer peripheral apex P when the outer peripheral apex P of the outer peripheral apex 20 is positioned while being engaged and connected. The table cradle 2 is pushed up horizontally or diagonally on one side and dropped on the device frame 1 by its own weight from the ascending limit. [Selection diagram] Fig. 1

Description

  The present invention relates to a vibration / impact testing apparatus that simulates and simulates vibrations and shocks received by various products and packages in various transportation environments.

Patent Document 1 and the like describe a vibration test apparatus that performs a vibration test by simulating the vibration that a package receives in a transport environment.
This vibration test device is, for example, a vertical vibration that occurs when overcoming road irregularities or steps during land transportation of a vehicle such as a truck, a left-right vibration that occurs when it reaches a curve, Then, the vibration test of the transported object is performed by simulating the combined vibration caused by the vibration in the front-rear direction that occurs during acceleration or deceleration such as sudden start or braking. In other words, the vibration test is performed by allowing vibration to be loaded simultaneously on the specimen (sample) placed on the mounting table (vibration table) of the vibration test apparatus in the three axial directions of the vertical direction, the horizontal direction, and the front-rear direction. It is configured.
As a result, the load (vibration acceleration) caused by the repetitive excitation force in the up / down / left / right and front / rear directions that the package receives during transportation is loaded on the package to check whether the package is damaged or not, etc. Thus, the strength (vibration resistance) of the transported object against vibration is evaluated.

Patent Document 2 and the like describe an impact test apparatus that performs an impact test by giving an impact (gravity acceleration) received in a transportation environment to a transported item (package cargo) with high reproducibility.
For example, when the vehicle such as a truck is running, the impact test apparatus jumps on the vehicle bed when the vehicle crosses a step with a height difference between the sidewalk and the roadway, or the vehicles collide with each other. The impact test of a transported object is performed by reproducing the strong force and impact force generated in a short time. In other words, the impact strength of the package is evaluated.

  By the way, evaluation of strength against vibrations and impacts of transported goods such as various products and packages in the transport environment is, for example, vibration generated continuously during transport, and generated in a short time. This is done in order to grasp and verify that the buffer packaging design for protecting the product from the impact that disappears is appropriate.

JP 2006-337086 A JP2011-149696A

However, in the prior arts described in Patent Documents 1 and 2, the vibration test and the impact test of the test object (specimen), which is a transported object, must be individually performed using each dedicated test apparatus. Therefore, conventionally, there is a problem in terms of equipment cost, such as the necessity of investing in equipment that requires the purchase of dedicated test devices for vibration testing and impact testing.
In addition, in the prior art, since it is necessary to individually perform a vibration test and an impact test using a dedicated test apparatus, a complicated setup work is required before each test, and the test time is inefficient. There is also the problem of hanging.

  This invention makes it an example of a subject to cope with such a problem. In other words, both the vibration test and the impact test can be reproduced with a single test device, both tests can be reproduced simultaneously (together), and in the impact test, a vehicle bed such as a truck can be used. The purpose of the present invention is to make it possible to reproduce the vertical and horizontal shocks and vertical shocks received by the transported goods.

  In order to solve the above-described problems, a vibration / impact test apparatus according to the present invention has at least the following configuration.

A table pedestal installed on the machine frame so as to be able to rise horizontally and / or obliquely on one side, a placing table for a test object supported on the table pedestal via elastic members at the bottom corners, A vibration test drive that is installed on the lower surface of the mounting table so that vibrations in the vertical and horizontal directions can be applied to the mounting table, and an impact that is installed in the device frame and pushes up and raises the table cradle. With a test drive,
The impact test drive is configured to be able to push up and lift the table cradle via power transmission means, and the power transmission means is formed to be able to be engaged and disengaged in the vertical direction, and the impact test drive unit The table cradle is pushed up and raised in an engaged and connected state that receives the power from the above, and the table cradle is dropped onto the device frame by being released from the engaged and connected state in the ascending limit. It is comprised so that it may make it.

Here, the table cradle is supported by a front and rear lifting support mechanism on both the left and right sides of the apparatus frame that is rectangular in plan view, and the lifting support mechanism is supported on the lower surface of the table base. The front and rear lifting support portions respectively disposed at the front and rear positions on both sides, and the guide portions that are respectively attached to the lifting support portion side and the device machine frame side and support the lifting support portion so as to be movable up and down, It is preferable to employ a configuration in which a bearing mechanism that pivotally supports the front side and the rear side of the table base so as to be tiltable is interposed between the lift support part and the table base.
Further, the power transmission means includes a cam attached to the output shaft side of the impact test drive machine, and attached to the lower surface side of the table cradle, along the cam outer periphery (contour curve) as the cam rotates. The impact test drive is an electric motor, wherein the impact test drive is configured to include a cam follower that is engaged and connected and is detached from the outer peripheral vertex when the outer peripheral vertex (cam apex) is located on the outer periphery of the cam. It is preferable to employ a configuration such as a sensor that detects at least the rotational displacement position of the cam attached to the output shaft of the electric motor.

According to such a configuration, after the test object is set and placed on the placement table, the vibration test drive is driven, and is supported on the table cradle through the elastic members at the bottom corners. It is possible to perform a vibration test in which the placed table is vibrated in the up / down / left / right / front / rear directions, and the test object on the placement table is vibrated simultaneously in the up / down / left / right front / rear directions (three axis directions).
On the other hand, by driving the impact test drive, the table pedestal is raised horizontally and / or obliquely raised on one side by the power transmission means in the engaged and connected state in the vertical direction by receiving the power of the drive, and the rise The table cradle can be dropped by its own weight onto the apparatus frame by detaching the power transmission means at the limit. That is, it is possible to perform an impact test in which a strong force is applied to the test object on the mounting table in a short time by dropping the table cradle by its own weight.
In addition, the vibration test drive and the impact test drive are driven simultaneously to vibrate the test object on the mounting table in the vertical and horizontal directions and the table cradle. It is possible to simultaneously perform an impact test that applies a strong force to the DUT on the table in a short time.

  According to the vibration / impact test apparatus of the present invention, it is possible to perform both the vibration test and the impact test of the DUT. Moreover, the vibration test and the impact test can be performed simultaneously (together).

  In the impact test, a horizontal drop impact test in which the DUT is raised and dropped horizontally, and an oblique drop impact test in which only one side of the DUT is raised and dropped can be performed. For example, when a vehicle such as a truck is traveling, the impact force when a load jumps horizontally on the loading platform when climbing over a step between a sidewalk and a roadway on a relatively flat place, or a slope Impact in various situations that the package receives in the transportation environment, such as the impact force when the package jumps diagonally on the loading platform when climbing over the step between the sidewalk and the roadway in a sloped area An impact test that simulates (gravitational acceleration) can be performed.

  According to the present invention, both the vibration test and the impact test are performed by simulating the vibrations and impacts of various products and packages, such as trucks, in various transport environments. It is possible to provide a vibration / impact test apparatus capable of performing the above in one unit. This is advantageous in terms of equipment costs compared to the prior art, and eliminates the need for individual setup prior to the vibration test and impact test, thereby improving the efficiency of the test work and reducing the test time. It is possible to expect remarkable effects such as being able to greatly shorten

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing (vertical side view) which shows the whole structure of the vibration and the impact testing apparatus which concerns on embodiment of this invention in a longitudinal section except for a part. It is explanatory drawing (plan view) shown in the state which abbreviate | omitted the mounting table and table cradle of the test apparatus. It is explanatory drawing (front view) which expands and shows the principal part (operation | movement mechanism part) of the test apparatus. It is explanatory drawing (partial enlarged view) which expands and shows the principal part (cam mechanism part) of the test apparatus further. It is explanatory drawing which shows a state when a table cradle is pushed up horizontally and raised in the impact test by the test apparatus. It is explanatory drawing which shows the state when pushing up and raising the front side of a table cradle diagonally by using the bearing mechanism of a rear side as a fulcrum in the impact test. It is explanatory drawing which shows the state when pushing up and raising the back side of a table cradle diagonally by making the front side bearing mechanism into a fulcrum in the impact test.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. The embodiment of the present invention includes the contents shown in the drawings, but is not limited to this.
FIG. 1 is an explanatory view showing the overall configuration of a vibration / impact test apparatus according to an embodiment of the present invention in a longitudinal section except for a part thereof, and FIG. 2 is a state in which a part of the test apparatus is omitted. FIG. 3 is an explanatory view showing an enlarged main part of the test apparatus, and FIG. 4 is an explanatory view showing an enlarged main part of the test apparatus.
In this embodiment, in the direction of the vibration / impact test apparatus A, for example, the front / rear / right / left directions of the apparatus frame 1 and the table cradle 2 described later, the front side is the left side of FIG. 1 and FIG. 1 and 2 indicate the right side of the drawing, and the left and right and both sides indicate the vertical direction of the drawing in FIG. 2 (the lower side of the drawing is the left side and the upper side of the drawing is the right side). The front side of the table cradle 2 is the front side (Fr) of the vehicle body such as a truck, the rear side is the rear side (Rr) of the vehicle body, the left side is the left side (L) of the vehicle body, and the right side is the right side (R) of the vehicle body. Assumed.

≪Explanation of vibration and impact test equipment A≫
A vibration / impact test apparatus (hereinafter simply referred to as “test apparatus”) A includes a table cradle 2 installed on an apparatus machine frame (mounting frame) 1 so as to be able to rise horizontally and / or obliquely rise on one side. On the table cradle 2, the mounting table 3 of the object M to be supported via the coil springs 4 which are elastic members at the four corners of the lower surface, and the vibration test installed in a suspended manner on the lower surface of the mounting table 3 Vibration tester 5 which is a driving machine for driving and an impact test drive which is installed in the apparatus frame 1 and pushes and lifts the table cradle 2 horizontally in a joint operation, or pushes up and rises one side obliquely in a single operation. It comprises two electric motors 6 and 7, which are machines.
In the present embodiment, the table cradle 2 can be raised horizontally on the apparatus frame 1 as shown in FIG. 5 described later, and the front and rear sides as shown in FIGS. 6 and 7 described later. Each side is installed so that it can be lifted diagonally.

  Although not shown in a specific configuration form, the test apparatus A according to the present embodiment includes an apparatus operation panel (liquid crystal touch panel) with a built-in apparatus control unit. This device operation panel is provided with various buttons and knobs to be described later. By these various buttons and knob operations, the test apparatus A starts each test operation of the vibration test and the impact test of the DUT M, and The test operation is configured to be controlled.

<< Description of Device Machine Frame 1 >>
The apparatus machine frame 1 is formed into a frame shape in a plan view that is long in the front-rear direction (the left-right direction in FIG. 1 and FIG. 2) at an appropriate height using an angle (channel) material or the like. And when the apparatus machine frame 1 performs the moving wheel (caster) 8 and the vibration test and the impact test at the four corners of the lower surface of the frame, the apparatus machine frame 1 is placed on the floor surface with the moving wheel 8 floating. A leg seat 9 is provided for stationary and stable installation. The leg seat 9 is provided so as to be vertically movable by a screw member, a nut member, or the like.

≪Description of table cradle 2≫
The table cradle 2 is formed in a substantially rectangular shape in plan view having a suitable thickness (height) by cutting and welding using an iron plate or the like and having a size corresponding to the plan view shape of the device frame 1. . Further, the table cradle 2 is provided with a lower surface member 10 made of a square pipe material or the like along each side of the lower surface of the front, rear, left, and right, and a concave portion 11 having an upward opening on the upper surface side. The dent 11 is formed in a form having an opening width and a depth in which the vibration exciter 5 installed on the lower surface of the mounting table 3 is accommodated so as not to touch the table cradle 2.
Thus, the vibration test can be performed by operating the vibration exciter 5 and vibrating the mounting table 3 on which the device under test M is placed without touching the table cradle 2 during the vibration test.

  In addition, the table cradle 2 is pushed up and raised to the front and rear positions (total of four locations) of the lower surface member 10 located on the left and right surfaces of the lower surface, during the impact test, so Legs 12 made of soft or hard for avoiding a collision are provided.

  The table cradle 2 formed in this way is described later by two elevating support mechanisms 13 at the front and rear positions respectively attached to the front and rear positions inside the left and right sides (both long sides) of the apparatus frame 1. As shown in FIG. 5, it is supported on the apparatus machine frame 1 so as to be movable up and down horizontally. Further, as shown in FIGS. 6 and 7 to be described later, the table cradle 2 is moved up and down as described later through the bearing mechanism 14 so that the front side and the rear side can be obliquely moved up and down one side. It is pivotally supported on and supported by the support portion 13a.

<< Description of Lifting Support Mechanism 13 >>
The elevating support mechanism 13 moves up and down the front and rear elevating support parts 13a respectively disposed at the front and rear positions of the table cradle 2 via the bearing mechanism 14 and a vertical member 13a-1 described later of the elevating support part 13a. It is comprised from the guide part 13b supported so that it is possible.
The elevating support portion 13a includes left and right vertical members 13a-1 that are mounted and supported in a frame on both the left and right sides of the device machine frame 1 via the guide portion 13b so as to be movable up and down, and between both the vertical members 13a-1. It is formed in a substantially gate shape from a horizontal member 13a-2 having a substantially downward L-shape in a longitudinal sectional view (cross-sectional sectional view) attached in a bridging manner (see FIG. 3).
The guide portion 13b is attached so as to sandwich the rail member 13b-1 in the width direction, and the rail member 13b-1 that is vertically attached to the inner sides of the left and right sides of the device frame 1 via the attachment member 15. The rail member 13b-1 is formed from a slide member 13b-2 that can slide up and down, and the vertical member 13a-1 of the elevating support portion 13a is attached to and supported by the slide member 13b-2 (FIG. 2 and FIG. 3).

<< Description of Bearing Mechanism 14 >>
The bearing mechanism 14 is positioned on both sides of the first receiving member 14a mounted on the horizontal member 13a-2 of the elevating support portion 13a and on the lower surface of the table cradle 2 so as to sandwich the first receiving member 14a. A pair of second receiving members 14b to be attached and a shaft member 14c that is inserted through the first receiving member 14a and attached between the second receiving members 14b and connects the two members 14a and 14b like a hinge are formed. .
The first receiving member 14a includes a shaft insertion port 16 into which the shaft member 14c is inserted. The shaft insertion port 16 is a square hole having a diameter (opening) of a size that allows the shaft member 14c to freely move in the axial direction. Both end portions of the shaft member 14c penetrating through the shaft insertion port 16 and projecting from the pair of second receiving members 14b are fixed to the second receiving member 14b with wrench bolts or the like via washers. Further, a bush member (cylindrical member) 17 made of a material having lubricity is provided on the outer periphery of the shaft member 14c located in the shaft insertion port 16 of the first receiving member 14a.
Due to the relationship between the shaft member 14c formed in this way and the shaft insertion port 16, the cam 19a and the cam follower of the apparatus frame 1 and the cam mechanism 19 described later are used in the impact test performed by pushing up and raising the table cradle 2. In order to prevent the drop impact force from being directly transmitted to 19b or the like, the impact force is devised so as to escape (relax) by the fluid movement (sliding) of the shaft member 14c in the shaft insertion port 16 of the first receiving member 14a. ing. Further, the table receiving member 2 is devised so as to jump up when the table member 2 falls by its own weight (gravity drop) on the apparatus frame 1 by the fluid movement of the shaft member 14c.

≪Description of mounting table 3≫
The mounting table 3 is formed in a size corresponding to the planar view shape of the table cradle 2 by bending using an iron plate or the like. This mounting table 3 is provided with coil springs 4 at the lower corners of the lower surface, and is supported horizontally on the table base 2 by the coil springs 4 (parallel to the table base 2).
As a result, the mounting table 3 is vibrated by the vibration exciter 5, and vibration caused by the vibration is absorbed by the coil spring 4 and is not transmitted to the table cradle 2 side. The mounting table 3 includes an L-shaped holder 18 for holding the DUT M in a fixed shape.

≪Explanation of shaker 5≫
Although the specific structural explanatory drawing is abbreviate | omitted, the vibration exciter 5 consists of a rotation drive machine built-in part and an eccentric flywheel built-in part, for example, is integrated with the rotating shaft of drive machines, such as a motor, and this rotating shaft. The rotary vibration generator is configured to generate a vibration having a frequency corresponding to the rotation speed due to a weight imbalance with the interlocking eccentric flywheel.
Further, the vibration exciter 5 is attached to the mounting leg portion provided on the side of the built-in rotation drive unit with the balance of the center of gravity adjusted so that the rotation axis of the drive unit extends in the front-rear direction at a substantially central portion of the lower surface of the mounting table 3. Thus, vibrations in the vertical direction (Z-axis direction), left-right direction (X-axis direction), and front-back direction (Y-axis direction) can be simultaneously loaded on the mounting table 3 by swinging the eccentric flywheel. . That is, the vibration exciter 5 is configured to be capable of loading (vibrating) the DUT M on the mounting table 3 by XYZ three-axis simultaneous vibration.

≪Description of electric motors 6 and 7≫
The two electric motors 6 and 7 are IPM brake gear motors. As shown in FIGS. 1 and 2, the two electric motors 6, 7 are supported by raising / lowering a lifting support mechanism 13 that supports the table cradle 2 so that it can be moved up and down at the bottom inside the frame of the apparatus machine frame 1. In the state where the output shafts 6a and 7a are positioned corresponding to the front and rear positions in the frame of the apparatus machine frame 1 to which the part 13a and the guide part 13b are attached, they are respectively installed in parallel at the front and rear positions of the inner bottom part of the apparatus machine frame 1. .
In this way, the output shafts 6a and 7a of the two electric motors 6 and 7 installed on the bottom of the apparatus machine frame 1 and the table cradle 2 in the vertical direction by the cam mechanism 19 serving as power transmission means. It is connected so that it can be connected / disconnected in the (vertical direction).

≪Explanation of cam mechanism 19≫
The cam mechanism 19 converts the rotational movement of the output shafts 6a and 7a of the electric motors 6 and 7 into a vertical vertical movement that pushes and raises the table cradle 2, and when the table cradle 2 is lifted and lifted, the cam mechanism 19 is longitudinal. The engagement linkage state is maintained, and when the table cradle 2 is pushed up to the upper limit, the engagement linkage state is released.
The cam mechanism 19 includes a cam 19a attached to the output shafts 6a and 7a of the electric motors 6 and 7, and a cam outer periphery which will be described later following the rotation of the cam 19a. 20 and a cam follower 19b engaged and connected in the vertical direction (vertical direction).

≪Explanation of cam 19a≫
The cam 19a is a plate cam (peripheral cam) having a predetermined plate thickness. The cam 19a has a substantially circular circumference from a small-diameter outer periphery 21 of a rotating shaft core attached to the output shafts 6a and 7a in a stationary manner toward an outer peripheral vertex (cam apex) P at a predetermined dimension position in the circumferential radial direction (radial direction). A cam outer circumference (contour curve, cam circumference) 20 is provided in a semicircular shape.
And the cam 19a is formed in the form provided with the removal | desorption fall part (fall cliff part) 22 connected in a straight line of acute angle toward the small diameter outer periphery 21 from the outer periphery vertex P. As shown in FIG.

≪Explanation of cam follower 19b≫
The cam followers 19b are respectively mounted on the rotating circumferential track line of the cam outer periphery 20 at the front and rear positions of the lower surface of the table cradle 2 positioned directly above the cam 19a attached to the output shafts 6a and 7a of the electric motors 6 and 7. They are respectively mounted and arranged in a hanging manner via the mechanism 27.
As a result, the cam follower 19b is in a longitudinal direction along the cam outer periphery 20 in a linked state in which the cam follower 19 follows the cam outer periphery 20 of the cam 19a that rotates integrally with the output shafts 6a, 7a by the power received from the output shafts 6a, 7a. While being pushed up (up and down direction) and positioned at the outer peripheral vertex P of the cam outer periphery 20, it is detached and dropped from the outer peripheral vertex P to the small-diameter outer periphery 21 along the separation / falling portion 22. That is, every time the cam 19a makes one rotation, the cam follower 19b is detached and dropped from the outer peripheral vertex P of the cam outer periphery 20, so that the table cradle 2 falls by its own weight (gravity drop) onto the apparatus frame 1 from the lifted upper limit. It is like that.

<< Description of mounting mechanism 27 >>
As shown in FIGS. 2 and 3, the attachment mechanism 27 includes an L-shaped member 27a that rotatably supports the cam follower 19b, a movable shaft member 27b that supports the L-shaped member 27a so as to move up and down, and this movement. A holder member 27c that supports the shaft member 27b with respect to the lower surface of the table cradle 2 and a lift shaft upper limit washer 27d and a lift shaft guide 27e for the cam follower 19b to always keep the cam 19a in the direction of the cam outer periphery 20 are configured. ing. The attachment mechanism 27 includes a clamp lever 27f for locking the movable shaft member 27b to the holder member 27c.
Thereby, the drooping dimension (distance) of the cam follower 19b from the table cradle 2 can be arbitrarily adjusted and changed. In other words, when the impact test is performed, the table cradle 2 is pushed up from the device frame 1 and the raised height is arbitrarily adjusted according to the form or type of the test object (transported object) M, thereby allowing the test target to be tested. The strength (size) of the drop impact force applied according to the form and type of the object M can be easily changed.

  In this embodiment, the rotational positions of the output shafts 6a and 7a of the electric motors 6 and 7 are detected. More specifically, in order to detect the rotational positions of the output shafts 6a and 7a so that the rotational postures of the cams 19a attached to the output shafts 6a and 7a are always in the same rotational symmetry positional relationship (rotational orientation relationship). The sensor 28 is provided.

<< Description of Sensor 28 >>
The sensor 28 is a photomicrosensor (light sensor) in which a light projecting portion and a light receiving portion are set in a U-shape (groove shape). The sensor 28 is positioned around the rotation of the output shafts 6a and 7a and is attached by a support member 30, and a detection plate (tog) 29 attached to the output shafts 6a and 7a is connected to the output shafts 6a and 7a. The rotation posture (rotational directionality) of the cam 19a is detected by passing between the light projecting unit and the light receiving unit by the rotation of.
In other words, the sensor 28 is connected to both the electric motors 6 and 7 via the device control unit, and the output shaft 6a is symmetrical about the axis with respect to the mounting direction around the shaft with respect to the output shafts 6a and 7a of the cam 19a. , 7a sequentially outputs the rotation position signal of the cam 19a (the rotation signal of the output shafts 6a, 7a) when the detection plate 29 attached to the light passes between the light projecting portion and the light receiving portion. It is configured as follows.
As a result, the two electric motors 6 and 7 were simultaneously operated at the same rotationally symmetrical position with respect to the rotational posture of the cam 19a attached to the output shafts 6a and 7a of the two electric motors 6 and 7. An impact test of the object M can be performed. That is, as shown in FIG. 5, after the two electric motors 6 and 7 are operated simultaneously to push the table cradle 2 up and up horizontally, the table cradle 2 is moved onto the apparatus frame 1 from the ascending limit. It is possible to reliably execute (perform) the horizontal drop impact test of the DUT M that is performed by dropping its own weight horizontally.

Further, in this embodiment, in order to prevent the drop impact force of the table cradle 2 during the impact test from being directly transmitted to the lifting support mechanism 13 and the device frame 1, the impact force is absorbed and attenuated. A shock absorber 31 is provided.
The shock absorber 31 is a cylindrical shock absorber such as a damper method using oil or a damper method using an elastic body such as a spring. As shown in FIG. 3, the shock absorber 31 receives the elevating support portion 13a of the elevating support mechanism 13 as shown in FIG. It is located below the lower end of the vertical member 13a-1 of the elevating support portion 13a and is attached to the attachment member 15 via the L-shaped member 32.

[Description of operation]
Next, a vibration test and an impact test of the DUT M using the test apparatus A according to the present embodiment configured as described above will be described.
5-7 is explanatory drawing which shows the state which pushed up and raised the table base horizontally, and the state which pushed up and raised one side diagonally in the impact test. Here, description will be made with reference to FIG. 1 as appropriate.

First, the vibration test will be described. In the state shown in FIG. 1, a packaging box (corrugated cardboard box) m containing a test object M, for example, a plastic bottle, is placed on the mounting table 3, and an L-shaped holding tool. The packaging box m is set and held on the mounting table 3 so as to be sandwiched from four sides by 18 or the like.
After setting the packaging box m on the mounting table 3, the vibration test is started by operating the vibration exciter 5 by a vibration operation button of a device operation panel (liquid crystal touch panel) (not shown). Then, the packaging box m on the mounting table 3 supported on the table cradle 2 through the coil springs 4 at the four corners of the lower surface is moved in the vertical direction (Z-axis direction), left-right direction (X-axis direction), front-rear direction ( A vibration test is performed (executed) while applying three-axis simultaneous vibration in the Y-axis direction). At this time, the vibration test is performed at a vibration test time corresponding to the DUT M. When the vibration test time has elapsed, the shaker 5 is stopped by the vibration operation button.

  Although illustration of a specific configuration and explanation thereof are omitted, a vibration test setting knob is provided on the device operation panel, and by this setting knob, it is possible to arbitrarily set a vibration test time in the device control unit, The device controller (inside the microcomputer) is equipped with a timer unit that starts counting when the vibration test starts, so that the vibration exciter can be used after the vibration test time set by the vibration test setting knob has elapsed. The operation of 5 can be automatically stopped.

  When the impact test of the packaging box m set on the mounting table 3 is continuously performed after the vibration test is completed, the electric motor is operated by an impact operation button (not shown) provided on the apparatus operation panel. By driving both or any one of 6, 7, the impact test of the packaging box m on the mounting table 3 can be performed as it is after the vibration test is completed. At this time, as shown in FIG. 5, a horizontal drop impact test is performed by pushing up and raising the entire table cradle 2 horizontally, or as shown in FIGS. An unillustrated impact test selection button (switch) provided on the apparatus operation panel for either one-side oblique drop impact test performed by pushing up and raising the front or rear side of the table cradle 2 with the front bearing mechanism 14 as a fulcrum. Select by.

  The impact test selection buttons are the horizontal drop impact test shown in FIG. 5, the one-side oblique drop impact test using the bearing mechanism 14 on the rear side of the lower surface of the table cradle 2 shown in FIG. 6, and the table shown in FIG. Three patterns of impact tests such as a one-side oblique drop impact test using the bearing mechanism 14 on the lower front side of the cradle 2 as a fulcrum are selectable. For example, the three patterns of impact tests shown in FIGS. 5 to 7 can be performed (executed) by operating buttons of the three patterns, respectively.

Here, when the operation button of the horizontal drop impact test shown in FIG. 5 is selected, the two electric motors 6 and 7 start operation simultaneously. Then, the cams 19a attached to the output shafts 6a and 7a of the two electric motors 6 and 7 have the same rotational posture (in FIG. 5, the cam 19a on the electric motor 6 side is counterclockwise and the cam on the electric motor 7 side is 19a rotates clockwise), follows the rotation of the cam 19a, and the cam follower 19b is engaged and connected in the vertical direction along the outer periphery 20 of the cam, and a table receiver by the mounting mechanism 27 that pivotally supports the cam follower 19b. Power that pushes up the front and rear of the table 2 simultaneously is transmitted from the electric motors 6 and 7 to the table cradle 2 to push up and raise the entire table cradle 2 horizontally.
The cam follower 19b is detached from the outer peripheral vertex P when the outer peripheral vertex P of the cam outer periphery 20 of the cam 19a reaches the push-up ascent limit of the table cradle 2 engaged and connected to the cam follower 19b. Then, the table cradle 2 in which the package m is set on the mounting table 3 falls by its own weight (gravity drop) horizontally on the apparatus frame 1 shown in FIG. 1 from the push-up ascending limit shown in FIG. Thus, a horizontal drop impact test is performed in which a strong force is applied to the package m on the mounting table 3 in a short time by a horizontal drop of the table cradle 2.

  In addition, by inputting and setting the number of tests (the number of times the table cradle 2 is dropped) to the device control unit of the device operation panel by using the number-of-tests setting button provided on the operation panel, etc. A horizontal drop impact test in which an impact force is repeatedly applied to m can be performed. The number of tests is the number of times the detection plate 29 passes through the sensor 28 every time the output shafts 6a and 7a rotate, that is, the signal output from the sensor 28 when the detection plate 29 passes is measured by the device control unit (micro It can be counted by a counting means incorporated in the computer.

On the other hand, when the one-side oblique drop impact test shown in FIGS. 6 and 7 is selected, for example, when the front oblique drop impact test using the bearing mechanism 14 on the rear side of the lower surface of the table cradle 2 shown in FIG. Only the electric motor 6 starts operation alone. Then, following the rotation of the cam 19a attached to the output shaft 6a of the electric motor 6, the cam follower 19b that is engaged and connected in the vertical direction along the outer periphery 20 of the cam, and the attachment mechanism 27 that supports the cam follower 19b. As a result, the power that pushes up the front side of the table cradle 2 is transmitted from the electric motor 6 to the table cradle 2, and the front side of the table cradle 2 is pushed up and raised obliquely with the bearing mechanism 14 as a fulcrum.
The cam follower 19b is detached from the outer peripheral vertex P when the outer peripheral vertex P of the cam outer periphery 20 of the cam 19a reaches the push-up ascent limit of the table cradle 2 engaged and connected to the cam follower 19b. Then, the table cradle 2 in which the package m is set on the mounting table 3 is dropped by its own weight (gravity drop) obliquely onto the device frame 1 as shown in FIG. 1 from the front oblique push-up ascending limit shown in FIG. ) That is, a diagonal drop impact test is performed in which a strong force is applied to the package m on the mounting table 3 by a diagonal push-up by a single diagonal and short time by the diagonal drop of the front side of the table cradle 2.

As described above, according to the test apparatus A according to the present embodiment, after the package m as the DUT M is set and held on the mounting table 3, the shaker 5 is operated, The mounting table 3 supported on the table cradle 2 through the coil springs 4 at the bottom corners is vibrated up, down, left, and right and back and forth, and the package m on the mounting table 3 is moved up and down, left and right and back and forth. A vibration test can be performed while applying simultaneous vibration.
In addition, by operating both or any one of the electric motors 6 and 7, the attachment mechanism of the cam 19a, the cam follower 19b, and the cam follower 19b of the cam mechanism 19 that is in an engaged and connected state by receiving the power of the electric motors 6 and 7 27, the table cradle 2 is raised horizontally or obliquely lifted on one side, and the table cradle 2 is dropped onto the device frame 1 by its own weight when the cam follower 19b is detached from the cam 19a at the ascending limit. Impact tests can be performed. That is, it is possible to perform an impact test that applies a strong force in the vertical and horizontal directions or the vertical and diagonal directions to the package m on the mounting table 3 in a short time due to its own weight drop (gravity drop). it can.

Although illustration of a specific configuration and explanation thereof are omitted, in the test apparatus A according to the present embodiment, a vibration test by the vibrator 5 and an impact test by the electric motors 6 and 7 are simultaneously performed. It is configured to be able to.
That is, the apparatus operation panel is provided with a vibration / impact simultaneous operation button for simultaneously performing a vibration test and an impact test. This vibration / impact simultaneous operation button consists of a vibration / horizontal impact simultaneous operation button, a vibration / front side oblique impact simultaneous operation button, and a vibration / rear side oblique impact simultaneous operation button. Thus, the vibrator 5 for vibration test and the electric motors 6 and 7 for impact test can be operated at the same time.
As a result, a vibration test is performed while simultaneously applying three-axis vibration in the vertical, horizontal, and longitudinal directions to the package m on the mounting table 3, and the packaging on the mounting table 3 by the horizontal or one-side slant drop of the table cradle 2. The object m can be simultaneously subjected to a horizontal drop impact test or a one-side oblique drop impact test in which a strong force is applied to the object m in a short time.

In addition, although illustration and description of a specific configuration are omitted, in the test apparatus A according to the present embodiment, the horizontal drop impact test shown in FIG. 5 and the one-side oblique drop impact shown in FIGS. 6 and 7 respectively. Either one or both of the tests can be performed alternately.
That is, the apparatus operation panel is provided with a horizontal / diagonal alternate operation button for alternately performing a horizontal drop impact test and a one-side oblique drop impact test.
This horizontal / diagonal alternate operation button consists of a horizontal / front oblique alternate operation button, a horizontal / rear oblique alternate operation button, and a horizontal / front / rear oblique alternate operation button, and one of these operation buttons is selected. Thus, both the electric motors 6 and 7 can be operated simultaneously, only one of the electric motors 6 and 7 can be operated, or both the electric motors 6 and 7 can be started alternately.
Thereby, for example, the horizontal drop impact test and the front oblique drop impact test can be performed alternately, or the horizontal drop impact test and the front and rear oblique drop impact tests can be performed alternately. In this case, each drop impact test can be performed while switching operations alternately every time or alternately every several times. In other words, the microcomputer of the apparatus control unit can be executed by setting a program of operation operation patterns of alternate operation switching every time and alternate operation switching every several times.

Further, in this embodiment, the one-side oblique drop impact test shown in FIGS. 6 and 7 can be alternately performed.
That is, in the one-side oblique drop impact test, the apparatus operation panel is provided with a front / rear oblique alternate operation button for alternately performing a front oblique drop impact test and a rear oblique drop impact test. Also in this case, as described above, the one-side oblique drop impact test can be performed while switching the operation alternately every time or every few times.

As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and design changes and the like can be made without departing from the scope of the present invention. Even if it is, it is included in the present invention. Moreover, the description content of each figure can become each independent embodiment, and embodiment of this invention is not limited to one embodiment which combined each figure.
For example, when an electric servo motor is used as the impact test drive, the sensor 28 is not required. In other words, the rotational positions of the cam 19a on the electric motor 6 side and the cam 19a on the electric motor 7 side are always maintained in the same rotationally symmetrical positional relationship by controlling the mechanical position and angle of the servo motor, and a drop impact test. It is possible to control the impact pattern and the number of times described in detail above.

  In addition, the table cradle 2 is pushed up and raised in the longitudinally engaged state in response to the power from the electric motors 6 and 7, and the engaged state is released at the ascent end (the outer peripheral vertex P of the cam 19a). As the power transmission means, other engagement / disconnection mechanism such as a link mechanism can be employed. In other words, any mechanism may be used as long as the table cradle 2 is pushed up to the ascending limit, the engaged state is released at the ascending limit, and the table cradle 2 can drop by its own weight (gravity drop).

A Test equipment 1 Equipment frame 2 Table cradle 3 Placement table 4 Coil spring (elastic member)
5 Exciter (Driver for vibration test)
6,7 Electric motor (impact test drive)
6a, 7a Output shaft 13 Lift support mechanism 13a Lift support section 13a-1 Vertical member 13a-2 Horizontal member 13b Guide section 13b-1 Rail member 13b-2 Slide member 14 Bearing mechanism 14a First receiving member 14b Second receiving member 14c Shaft member 19 Cam mechanism (power transmission means)
19a cam 19b cam follower 20 cam outer periphery 21 small diameter outer periphery 22 detaching / falling portion P outer periphery apex 28 sensor 29 detection plate (toggle)
M DUT

Claims (4)

A table cradle installed on the machine frame so as to be able to rise horizontally and / or obliquely rise on one side;
A mounting table for a test object supported on the table cradle via elastic members at the bottom four corners;
A vibration test drive installed on the lower surface of the mounting table and capable of applying vibration to the mounting table;
An impact test drive installed on the machine frame to push up and lift the table cradle;
The impact test drive is configured to push up and lift the table cradle via power transmission means,
The power transmission means is formed so as to be able to be engaged and disengaged in the vertical direction, and pushes up and raises the table cradle in the vertical engagement and connection state that receives power from the impact test drive. The vibration / impact test apparatus is configured to drop the table cradle onto the apparatus machine frame by releasing the engaged and connected state at the limit. The table cradle is supported by the front and rear elevating support mechanisms so as to be movable up and down on the device frame, and can be pushed up and raised through the power transmission means.
The elevating support mechanism is attached to the elevating support part on the front and rear sides of the table cradle, and the elevating support part can be moved up and down. And a guide part that supports
2. A front and rear bearing mechanism that pivotally supports the front side and the rear side of the table cradle so as to be tiltable is interposed between the elevating support portion and the table cradle. The vibration and impact test equipment described in 1. The power transmission means includes a cam attached to an output shaft side of the impact test drive machine;
Attached to the lower surface side of the table cradle, follows the rotation of the cam, engages and connects in the vertical direction along the outer periphery of the cam, and detaches and falls from the outer peripheral vertex when positioned at the outer peripheral vertex of the cam outer periphery. The vibration / impact test apparatus according to claim 1, wherein the vibration / impact test apparatus is a cam mechanism including a cam follower.   The impact test drive is an electric motor, and includes a sensor for detecting at least a rotational displacement position of a cam attached to an output shaft of the electric motor. The vibration / impact testing device described in

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