Impact testing device

Abstract

An impact test device is provided with: a carriage which is capable of traveling in a horizontal traveling direction and on which a sample is loaded; a carriage drive unit that drives the carriage; an impact generating device which collides with the trolley and generates an impact applied to the sample; and an anti-tipping mechanism which is independent of the impact generating device and prevents the test object from tipping after the trolley collides with the impact generating device, the anti-tipping mechanism comprises a first mechanism independent from the trolley, and the first mechanism can move in the driving direction.

Description

[0001] This application is a divisional application of the application with application number 202080090620.2 filed on December 17, 2020. Technical Field

[0002] The present invention relates to an impact testing device. Background Art

[0003] An impact testing device is used to evaluate the strength of products and the adequacy of packaging designs. The impact testing device described in Japanese Patent Application Laid-Open No. 2019-35705 includes a support plate 36 for supporting a test specimen in order to prevent the test specimen from tipping over during the test. Figure 5 ) The support plate is provided perpendicularly to the traveling direction on a traveling section (impact table) for loading the test specimen. Summary of the Invention

[0004] Technical Problem to be Solved by the Invention

[0005] In the impact testing device described in Japanese Patent Application Laid-Open No. 2019-35705, since the support plate is provided on the impact table, the weight of the impact table is increased by the part of the support plate. In addition, since a support plate with a large area is arranged perpendicularly to the traveling direction of the impact table, when the impact table travels at high speed, a strong wind pressure is applied to the support plate. As the support plate is provided, the weight of the impact table and the wind pressure received by the impact table during traveling increase (in other words, air resistance increases), the power required to drive the impact table increases, and power consumption increases. In addition, since the power required to drive the impact table increases, a motor with a larger capacitance (i.e., a large motor) is required to drive the impact table, so problems such as an increase in cost and a large size of the testing device also occur.

[0006] In view of the above circumstances, an object of the present invention is to reduce the increase in the power required to drive the impact table due to the adoption of a mechanism for preventing the test specimen from tipping over.

[0007] Means for Solving the Problem

[0008] One aspect of the present invention provides an impact testing device including: a travelable cart for loading a test specimen; and an anti-tipping mechanism for preventing the test specimen from tipping over, and the anti-tipping mechanism is configured to include a first mechanism independent of the cart, and the first mechanism is movable in the traveling direction of the cart.

[0009] In the above impact testing device, the first mechanism may be configured to include: a support for supporting the test specimen and preventing the test specimen from tipping over when the test specimen is tilted; and a guiding mechanism for guiding the support to move in the traveling direction.

[0010] In the above impact testing device, it may also be configured to include a base on which the first mechanism is provided, and the first mechanism includes a fixing mechanism for removably fixing the support to the base.

[0011] In the above impact testing device, the first mechanism may also be configured to include a fixed guiding mechanism, which serves as both a guiding mechanism and a fixing mechanism. The fixed guiding mechanism includes: a T-shaped groove (T-shaped slot) that is fixed to the base and extends in the traveling direction; a T-shaped groove nut that is inserted into the T-shaped groove; and a bolt that fixes the support body to the T-shaped groove by being inserted into the T-shaped groove nut through a through hole formed in the support body.

[0012] In the above impact testing device, the first mechanism may also be configured to include a support body driving mechanism that drives the support body in the traveling direction.

[0013] In the above impact testing device, the support body driving mechanism may also be configured to include: a driving module that generates power for driving the support body; and a belt mechanism that transmits the power generated by the driving module to the support body.

[0014] In the above impact testing device, it may also be configured to include: a trolley driving unit that drives the trolley; and a control unit that controls the support body driving mechanism and the trolley driving unit; the control unit moves the support body to a specified position determined according to the test conditions.

[0015] In the above impact testing device, it may also be configured to include an impact generating device that collides with the trolley to generate an impact imparted to the test sample. The impact testing device can respectively perform: a collision-type test in which the impact generating device collides with the trolley loaded with the test sample to impart an impact to the test sample; and a non-collision-type test in which the impact generated by the driving of the trolley driving unit is transmitted to the trolley to impart an impact to the test sample; the control unit controls the trolley driving unit in the collision-type test by causing the impact generating device to collide with the trolley at a specified speed, and in the non-collision-type test, controls the trolley driving unit by driving the trolley according to a default impact waveform.

[0016] In the above impact testing device, the trolley driving unit may also be configured to include: a frame (Carriage, bracket, pallet) that is detachably connected to the trolley; and a trolley rail unit that movably supports the trolley and the frame; in the collision-type test, the frame is connected to the trolley, and in the non-collision-type test, the connection between the frame and the trolley is released.

[0017] In the above impact testing device, the impact generating device may also be configured to include: a movable block; a first plastic programmer that is installed on the surface of the movable block opposite to the trolley; a block rail unit that movably supports the movable block in the traveling direction; and a vibration absorber that absorbs the vibration of the movable block; the block rail unit includes a linear guide rail, and the linear guide rail includes: a rail; and a runner (Runner, rotating wheel) that is installed on the movable block and can travel on the rail via a rotating body; the trolley includes a second plastic programmer that is installed on the surface opposite to the movable block.

[0018] In the above impact testing device, an anti-tipping mechanism may also be configured to include a second mechanism provided on the trolley. The second mechanism includes: a plurality of support columns erected on the trolley; and a linear member spanned on the plurality of support columns.

[0019] On the other hand, the present invention provides an impact testing device, comprising: a drivable trolley for loading a test sample; and an anti-tipping mechanism for preventing the test sample from tipping over. The anti-tipping mechanism includes a second mechanism provided on the trolley. The second mechanism includes: a plurality of support columns erected on the trolley; and a linear member spanned on the plurality of support columns.

[0020] In the above impact testing device, the linear member may also be configured to include one of a belt-shaped member and a net-shaped member.

[0021] Effects of the Invention

[0022] When an embodiment of the present invention is adopted, the power required to drive the impact table can be reduced with the adoption of the mechanism for preventing the test sample from tipping over. Description of the Drawings

[0023] Figure 1 It is a top view of the impact testing device according to the first embodiment of the present invention.

[0024] Figure 2 It is a side view of the impact testing device according to the first embodiment of the present invention.

[0025] Figure 3 It is a front view of the impact testing device according to the first embodiment of the present invention.

[0026] Figure 4 It is a top view of an enlarged area near the impact generating device according to the first embodiment.

[0027] Figure 5 It is a side view of an enlarged area near the impact generating device according to the first embodiment.

[0028] Figure 6 It is a schematic block diagram showing the general configuration of the control system of the impact testing device according to the embodiment of the present invention.

[0029] Figure 7 It is a top view of the impact testing device according to the second embodiment of the present invention.

[0030] Figure 8 It is a schematic configuration diagram showing a modification example of the trolley drive unit.

[0031] Figure 9 It is a schematic configuration diagram showing a modification example of the drive module. Detailed Description of the Embodiments

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same or corresponding reference numerals, and redundant descriptions are omitted. In addition, when a common element among a plurality of symbols is shown in each drawing, not all of these plurality of displays are necessarily marked with symbols, and appropriate omission of symbols is made for a part of these plurality of displays. In addition, in each drawing, a part of the configuration is omitted or shown in cross-section for convenience of explanation.

[0033] (First Embodiment)

[0034] Figure 1 -3 are a plan view, a side view, and a front view of the impact test device 1 according to the first embodiment of the present invention, respectively. In addition, Figure 4 and Figure 5 are a plan view and a side view of the vicinity of the impact generation device 40, which will be described later, of the impact test device 1, respectively, in an enlarged manner.

[0035] In the following description, the direction from left to right in Figure 1 is defined as the X-axis direction, the direction from bottom to top is defined as the Y-axis direction, and the direction perpendicular to the paper surface from the back side to the front side is defined as the Z-axis direction. The X-axis direction and the Y-axis direction are horizontal directions orthogonal to each other, and the Z-axis direction is a vertical direction. In addition, the positive direction of the X-axis is called the front, the negative direction of the X-axis is called the back, the positive direction of the Y-axis is called the left, and the negative direction of the Y-axis is called the right.

[0036] The impact test device 1 according to the first embodiment of the present invention described below is configured to be capable of performing the following two test methods: a past-type test method (hereinafter referred to as "collision-type test") of applying an impact to the test specimen W by causing the impact table on which the test specimen (specimen) W is loaded to collide with the impact waveform generation device; and a new-type test method (hereinafter referred to as "non-collision-type test") of applying an impact to the test specimen W by transmitting the impact generated by the driving of the motor according to the impact waveform to the impact table.

[0037] The impact test device 1 includes: a carriage 20 (impact table) on which the test specimen W is loaded; a carriage drive unit 30 that drives the carriage 20; a track unit 10 (carriage track unit) that supports the carriage 20 and the carriage drive unit 30 so as to be able to travel in the X-axis direction; an impact generation device 40 (impact waveform generation device) that collides with the carriage 20 in the collision-type test and generates an impact applied to the test specimen W; and an anti-tipping mechanism that prevents the test specimen W from tipping over.

[0038] The track unit 10 includes: a roadbed 11 provided on the base 2 and extending in the X-axis direction; and a guide rail type circulating linear bearing (hereinafter referred to as "linear guide rail") 12 provided on the roadbed 11. The track unit 10 of the present embodiment includes multiple sets (for example, 3 sets) of roadbeds 11 and linear guide rails 12 arranged at equal intervals in the left and right directions (that is, in the Y-axis direction). In addition, multiple roadbeds 11 can be integrally connected. For example, the track unit 10 can also be configured such that multiple linear guide rails 12 are provided on a single roadbed 11.

[0039] Each linear guide rail 12 includes: a track 121 laid on the upper surface of the roadbed 11 (that is, fixed relative to the base 2); and multiple (for example, 7) moving wheels 122 that can travel on the track 121 via multiple rotating bodies ( Figure 3 ). The rotating bodies are held within a circulating path formed within the moving wheels 122 and between the track 121 and the moving wheels 122. A part (for example, 5) of the multiple moving wheels 122 of each linear guide rail 12 are arranged at equal intervals in the X-axis direction and installed on the lower surface of the carriage 20. In addition, the remaining (for example, 2) moving wheels 122 of each linear guide rail 12 are arranged at equal intervals in the X-axis direction and installed on the lower surface of a frame 32 of the carriage drive unit 30 described later. The carriage 20 and the frame 32 are guided by the linear guide rail 12 to move in the X-axis direction. In addition, the frame 32, the carriage 20, and the impact generating device 40 are arranged in sequence in the X-axis direction.

[0040] The carriage drive unit 30 includes: a frame 32 that can travel on the track unit 10; and a frame drive mechanism for driving the frame 32. The frame drive mechanism includes: a drive module 34 that generates power for driving the frame 32; and a belt mechanism (belt mechanism, conveyor belt mechanism) 35 that transmits the power generated by the drive module 34 to the frame 32.

[0041] The carriage drive unit 30 of the present embodiment includes: four drive modules 34 (34FL, 34BL, 34FR, 34BR) respectively arranged near the four corners of the base 2; and two sets of belt mechanisms 35 (35L, 35R) on the left and right. The left belt mechanism 35L is driven by a pair of left drive modules 34FL and 34BL, and the right belt mechanism 35R is driven by a pair of right drive modules 34FR and 34BR.

[0042] As Figure 3 shown, the drive module 34 includes: a frame 341, a servo motor 342, a belt mechanism 343, a shaft 344, and multiple bearings 345. The servo motor 342 is installed on the upper part of the frame 341 with its shaft 342b facing the Y-axis direction. The shaft 344 is arranged parallel to the shaft 342b of the servo motor 342 below and is rotatably supported by multiple bearings 345 installed on the frame 341.

[0043] The belt mechanism 343 includes: a drive pulley 343a coupled to the shaft 342b of the servo motor 342; a driven pulley 343c coupled to the shaft 344; and a toothed belt 343b wound around the drive pulley 343a and the driven pulley 343c. The drive pulley 343a and the driven pulley 343c each have a toothed pulley adapted to the teeth of the toothed belt 343b. In this embodiment, since the number of teeth of the driven pulley 343c is larger than that of the drive pulley 343a (i.e., the pitch circle diameter is larger), the belt mechanism 343 functions as a speed reducer, amplifies the torque output from the servo motor 342, and transmits it to the shaft 344.

[0044] The belt mechanism 35 includes: a pair of drive pulleys 351; a toothed belt (toothed belt, toothed conveyor belt) 352 wound around the pair of drive pulleys 351; and a belt clip (belt clip) 353 (winding intermediate node fixing tool (winding medium node fixing piece)) that fixes the toothed belt 352 to the vehicle frame 32. The drive pulley 351 is coupled to the shaft 344 of each drive module 34.

[0045] The toothed belt 352 and the toothed belt 343b have steel wire cores. In addition, the toothed belt 352 and the toothed belt 343b may also use, for example, cores formed of so-called super fibers such as carbon fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber. By using a lightweight and high-strength core such as a carbon core, even if a servo motor 342 with a relatively low output is used, since the vehicle frame 32 and the carriage 20 can still be driven with a large acceleration, the impact testing device 1 can be miniaturized. In addition, when using the servo motor 342 with the same output, by using the lightweight toothed belt 352 and the toothed belt 343b having cores formed of so-called super fibers, a shock with a greater acceleration can be imparted to the specimen W.

[0046] The pair of drive pulleys 351 of the left belt mechanism 35L are respectively coupled to the shafts 344 of the left pair of drive modules 34FL and 34BL, and the pair of drive pulleys 351 of the right belt mechanism 35R are respectively coupled to the shafts 344 of the right pair of drive modules 34FR and 34BR.

[0047] The vehicle frame 32 is detachably connected to the rear end portion of the carriage 20 through a coupling mechanism 321 (such as a bolt or an electromagnet, etc.). Specifically, the vehicle frame 32 is integrated with the carriage 20 during non-collision type testing and separated from the carriage 20 during collision type testing.

[0048] The carriage 20 includes: a workbench 21; and a plastic programmer (hereinafter referred to as "pad") 22 of the first impact adjustment mechanism installed on the front surface of the workbench 21. The carriage 20 of the present embodiment includes four pads 22 arranged at equal intervals in the Y-axis direction.

[0049] As Figure 4 shown, the impact generating device 40 includes: a movable block 41; a rail portion 42 (block rail portion) that supports the movable block 41 movably in the X-axis direction; a pad 43 installed on the back surface (the surface facing the carriage 20) of the movable block 41; and two pairs of vibration absorbers 44, 45 arranged on the left and right sides of the movable block 41. The vibration absorbers 44, 45 are, for example, oil hydraulic buffers.

[0050] The rail portion 42 includes: a roadbed 421 provided on the base 2 and extending in the X-axis direction; and a linear guide 422 provided on the roadbed 421. The rail portion 42 of the present embodiment includes multiple sets (for example, 3 sets) of roadbeds 421 and linear guides 422 arranged at equal intervals on the left and right. In addition, multiple roadbeds 421 can be integrally connected. For example, the rail portion 42 can also be configured such that multiple linear guides 422 are provided on a single roadbed 421.

[0051] Each linear guide 422 includes: a rail 422a laid on the upper surface of the roadbed 421; and multiple (for example, 4) moving wheels 422b that can travel on the rail 422a. The multiple moving wheels 422b are, for example, arranged at equal intervals in the X-axis direction and are installed on the lower surface of the movable block 41. The movable block 41 is guided to move in the X-axis direction by the linear guide 422.

[0052] As Figure 1 and Figure 3 shown, at the central portion of the movable range of the carriage 20, and on the left and right sides of the carriage 20, a pair of linear encoders 744 are provided. The main body of the linear encoder 744 is installed on the roadbed 11. The scales 744b of the linear encoder 744 are installed on the left and right side surfaces of the carriage 20. The position and speed of the carriage 20 are detected by the linear encoder 744.

[0053] The impact generating device 40 includes pads 43 of the second impact adjustment mechanism that are equal in number to the pads 22 of the carriage 20. The pads 43 are paired with the pads 22 and are installed on the back surface of the movable block 41 at positions opposite to the corresponding pads 22.

[0054] As Figure 4As shown, a pair of pressure plates 411 having two planes (operating surfaces 411a, 411b) perpendicular to the X-axis project from the left and right side surfaces of the movable block 41. The vibration absorber 44 arranges the piston rod 442 adjacent to the pressure plate 411 facing the pressure plate 411 on the front surface. The vibration absorber 45 arranges the piston rod 452 adjacent to the pressure plate 411 facing the pressure plate 411 on the back surface. The cylinder 441 of the vibration absorber 44 and the cylinder 451 of the vibration absorber 45 are fixed relative to the base 2. In addition, the front end of the piston rod 442 abuts against the operating surface 411a formed on the front surface of the pressure plate 411, and the front end of the piston rod 452 abuts against the operating surface 411b formed on the back surface of the pressure plate 411.

[0055] The movement of the movable block 41 in the positive X-axis direction is mainly attenuated by the vibration absorber 44, and the movement in the negative X-axis direction is mainly attenuated by the vibration absorber 45. By using a pair of vibration absorbers 44 and 45 arranged in reverse, the impact (vibration) of the movable block 41 can be more effectively attenuated.

[0056] In addition, in the present embodiment, oil hydraulic buffers are used as the vibration absorbers 44 and 45. However, air hydraulic buffers can be used instead of the oil hydraulic buffers. In addition, the oil hydraulic buffers and the air hydraulic buffers (or elastic components such as air springs and coil springs) can be combined vertically or horizontally. For example, in the Mcpherson Strut type suspension system of an automobile, the vibration absorber and the coil spring can also be coaxially arranged (that is, the vibration absorber passes through the hollow part of the coil spring), and these can be combined horizontally to form.

[0057] In the collision type test, the trolley 20 running inertially and the impact generating device 40 are collided to apply an impact to the trolley 20 and the test piece W. At this time, the workbench 21 of the trolley 20 and the movable block 41 of the impact generating device 40 are collided via the pads 22 and 43. In addition, the vibration (impact) of the movable block 41 generated by the collision is absorbed and attenuated by the vibration absorbers 44 and 45. Therefore, the impact waveform applied to the test piece W by the impact generating device 40 is changed by the characteristics of the vibration absorbers 44 and 45 (the first buffer mechanism) and the pads 22 and 43 (the second buffer mechanism). And in the way of applying the impact of the obtained waveform to the test piece W, the characteristics of the vibration absorbers 44 and 45 (the first buffer mechanism) and the pads 22 and 43 (the second buffer mechanism) are adjusted.

[0058] The anti-overturning mechanism of the present embodiment includes: a first bracket 50 (the first mechanism) independently provided on the base 2 from the trolley 20; and a second bracket 60 (the second mechanism) provided on the trolley 20.

[0059] The first support 50 includes: a substantially U-shaped support body 51; and a pair of rail portions 52 (support body rail portions) for the support body 51. When the specimen W loses balance and tilts, the support body 51 contacts the specimen W to prevent the specimen W from tipping over.

[0060] In the non-collision test, the position where the specimen W tips over (i.e., the position in the X-axis direction where a large impact is applied to the specimen W) changes according to the test conditions. Therefore, the first support 50 of the present embodiment is configured to be able to change the position of the support body 51 in the X-axis direction.

[0061] As Figure 3 shown, the support body 51 has: a beam 513 (connecting portion) extending left and right; a pair of legs 512 hanging down from the left and right end portions of the beam 513; a pair of feet 511 extending forward from the lower end portions of the respective legs 512; and two pairs of ribs 514 connecting the legs 512 and the feet 511. In addition, the beam 513 and the pair of legs 512 of the present embodiment are integrally formed by cutting from a single flat plate. Figure 3 In, as shown in the enlarged view surrounded by the two-dot chain line, a plurality of through holes 511a penetrating vertically are formed in the foot 511. The plurality of through holes 511a are formed in a row at equal intervals in the X-axis direction, for example.

[0062] A rectangular notch portion 51n surrounded by the beam 513 and the pair of legs 512 is formed in the lower part of the support body 51. The width (Y-axis dimension) and height (Z-axis dimension) of the notch portion 51n are larger than those of the carriage 20, and the carriage 20 can pass through the notch portion 51n. That is, in the state where the specimen W is not loaded on the carriage 20, the front-rear relationship (the arrangement order in the X-axis direction) between the carriage 20 and the support body 51 can be changed.

[0063] As Figure 1 shown, a pair of rail portions 52 are provided at the left and right end portions of the base 2. As Figure 3 shown in the enlarged view in, the rail portion 52 includes: a guide rail 521, a T-slot nut 522, and a bolt 523. The guide rail 521 is an elongated member formed with a T-shaped groove extending in the X-axis direction (a so-called T-shaped groove rail). A plurality of T-slot nuts 522 are embedded in the T-shaped groove of the guide rail 521.

[0064] By inserting the bolt 523 passing through the through hole 511a of the support body 51 into the T-slot nut 522, the support body 51 is detachably fixed to the rail portion 52. That is, the rail portion 52 functions as a fixing mechanism for fixing the support body 51 to the base 2.

[0065] In addition, when the bolt 523 is loosened, the fixing of the support body 51 relative to the rail portion 52 is released, and the support body 51 can move in the X-axis direction. At this time, since the bolt 523 does not detach from the T-slot nut 522, the foot portion 511 of the support body 51 is still connected to the T-slot nut 522 via the bolt 523. Since the T-slot nut 522 is embedded in the T-slot, the T-slot nut 522 (and the support body 51 connected to the T-slot nut 522) can only move in the X-axis direction, which is the extension direction of the T-slot. In other words, when the fixing of the support body 51 relative to the rail portion 52 is released, the rail portion 52 functions as a guiding mechanism for guiding the support body 51 to move in the X-axis direction.

[0066] In addition, the rail portion 52 of the present embodiment is configured as a fixed guiding mechanism that serves as both a fixing mechanism for fixing the support body 51 relative to the base 2 and a guiding mechanism for guiding the support body 51 to move in the X-axis direction (the traveling direction of the carriage 20). However, the fixing mechanism and the guiding mechanism can also be provided independently.

[0067] The second support 60 includes: four column stands 62 disposed near the four corners of the workbench 21 of the carriage 20; four posts 64 that can be respectively detachably held by the column stands 62; and a net 66 (linear member) supported by the four posts 64. The column stand 62 is a cylindrical member extending vertically, and the lower portion of the post 64 is inserted into the hollow portion of the column stand 62.

[0068] The net 66 forms a box shape (cubic shape) with the opening facing downward, covers the four sets of posts 64 and column stands 62, and is fixed to the posts 64, column stands 62, or the workbench 21 by fixing members (not shown). The net 66 is provided, for example, to be lower in height than the specimen W. As a result, since the upper portion of the specimen W contacts the net 66 and is elastically buffered and held by the net 66, tipping is prevented.

[0069] The second support 60 is composed of relatively thin members such as the posts 64 and the net 66 (or members connecting thin members into a net shape), and by arranging these thin members at intervals (for example, intervals larger than the thickness of each member), the weight of the second support 60 can be reduced. In addition, when the carriage 20 travels, the air resistance borne by the second support 60 can be reduced. Thereby, the power required to drive the carriage 20 can be reduced, the capacitance of the servo motor 342 can be decreased, the power consumption of the impact test device 1 can be saved, and the device can be miniaturized.

[0070] When the height of the specimen W is relatively low, the posts 64 may not be used, and the net 66 may be fixed to the column stand 62 or the workbench 21.

[0071] In addition, a belt-like member such as a rubber band or a rope may be used as the linear member to replace the mesh member such as the net 66. Further, a linear member formed of a material having general elasticity (elasticity) such as polypropylene and steel may be used instead of the elastic body.

[0072] In addition, a non-elastic linear member may be used, and a fixing member for elastically fixing the linear member to the support column 64 or the carriage 20 may be used.

[0073] Figure 6 FIG. is a schematic block diagram showing a control system 1a of the impact test device 1. The control system 1a includes: a control unit 72 that controls the operation of the entire device; a measurement unit 74 that performs various measurements; and an interface unit 76 that performs input / output with the outside.

[0074] The control unit 72 is connected to the servo motors 342 of the respective drive modules 34 via the servo amplifiers 342a. A rotary encoder RE is built in the servo motor 342. The phase information of the shaft 342b of the servo motor 342 detected by the rotary encoder RE is input to the control unit 72 via the servo amplifier 342a.

[0075] The control unit 72 and the respective servo amplifiers 342a are communicably connected by an optical fiber, and high-speed feedback control can be performed between the control unit 72 and the respective servo amplifiers 342a. Thereby, a plurality of servo motors 342 can be synchronously controlled more precisely (specifically, with high resolution and high accuracy on the time axis).

[0076] The interface unit (interface section) 76 includes, for example, one or more of a user interface (user interface) for input / output with a user, a network interface for connecting to various networks such as a LAN (Local Area Network), and various communication interfaces such as a USB (Universal Serial Bus) or a GPIB (General Purpose Interface Bus) for connecting to external devices. In addition, the user interface includes, for example, one or more of various input / output devices such as various operation switches, a display, various display devices such as an LCD (liquid crystal display), various pointer devices such as a mouse and a touchpad, a touch screen, a video camera, a printer, a scanner, a buzzer, a speaker, a microphone, and a memory card reader.

[0077] The measurement unit 74 includes: an acceleration sensor 742 and a linear encoder 744 mounted on the carriage 20, which amplify and digitally convert the signals from the acceleration sensor 742 and the linear encoder 744 to generate measurement data and transmit it to the control unit 72. In addition, an acceleration sensor 742 mounted on the specimen W can be added to the measurement unit 74 to measure the impact applied to the specimen W during the test.

[0078] Based on the control conditions such as the impact waveform (e.g., acceleration waveform) input via the interface unit 76 and the measurement data input from the measurement unit 74, the control unit 72 synchronously controls the driving of the servo motors 342 of each drive module 34. In addition, in this embodiment, two servo motors 342 are driven in the same phase (strictly speaking, the servo motors 342 of the left drive modules 34FL and 34BL and the servo motors 342 of the right drive modules 34FR and 34BR are driven in the opposite phase [reversed]).

[0079] As described above, the impact test device 1 of this embodiment can perform two types of tests: a collision-type test and a non-collision-type test. Next, the content and steps of each test will be described.

[0080] [Collision-type test]

[0081] The collision-type test is performed in a state where the connection between the carriage 20 and the frame 32 of the carriage drive unit 30 is released. In addition, during the collision-type test, when the carriage 20 collides with the impact generation device 40, a force that causes the specimen W to tip forward acts on the specimen W. Therefore, when using the first bracket 50, the support 51 of the first bracket 50 (more specifically, the beam 513) is, for example Figure 1 As shown, it is arranged near the rear end of the impact generation device 40 (i.e., the pad 43). In addition, the position of the support 51 of the first bracket 50 is appropriately adjusted according to the size, shape, weight distribution, etc. of the specimen W.

[0082] In the collision-type test, first, the frame 32 is moved to the start position S, which is set near the rear end of the drivable range (the movement range of the carriage 20 in the X-axis direction), by driving the drive module 34. Next, for example, it is manually moved to the position where the carriage 20 contacts the frame 32, and the specimen W is loaded onto the workbench 21 of the carriage 20. When using the second bracket 60, the specimen W is held on the workbench 21 by the second bracket 60.

[0083] When the loading of the specimen W onto the carriage 20 is completed, for example, when the user operates the touch screen (interface unit 76) to output a start test command, the continuous impact is measured by the acceleration sensor 742 mounted on the carriage 20. The detection results of the acceleration sensor 742 are accumulated and stored in the storage body 721 connected to the control unit 72, and the impact waveform (e.g., acceleration waveform) is graphically displayed on the display device (interface unit 76).

[0084] Secondly, the vehicle frame 32 is gradually accelerated forward by driving the drive module 34. At this time, the carriage 20 is pushed by the vehicle frame 32 and travels at the same speed as the vehicle frame 32. When the vehicle frame 32 reaches a preset collision speed, the vehicle frame 32 is decelerated. When the vehicle frame 32 decelerates, the carriage 20 separates from the vehicle frame 32 and travels inertially at the collision speed, and then collides with the impact generating device 40.

[0085] The collision type test applies the impact generated by the collision of the carriage 20 with the impact generating device 40 to the test piece W placed on the carriage 20. In addition, a force that causes the test piece W to fall forward is applied by the collision. Therefore, although the test piece W tilts forward, since it contacts the support body 51 of the first support 50 disposed near the front end of the carriage 20, the test piece W is prevented from tipping over.

[0086] After the collision, after a specified time, the measurement by the acceleration sensor 742 is stopped, the test piece W is taken out from the carriage 20, and one collision type test is completed.

[0087] [Non - collision type test]

[0088] The non - collision type test is performed in a state where the vehicle frame 32 and the carriage 20 are connected as one body by the coupling mechanism 321.

[0089] The non - collision type test is changed by the test conditions (impact waveform, etc.) to predict the position where the test piece W will tip over (predicted tipping position). When using the first support 50, the support body 51 of the first support 50 is set near the predicted tipping position.

[0090] Next, the carriage 20 connected to the vehicle frame 32 is moved to the starting position by driving the drive module 34. In addition, the starting position of the non - collision type test can also be set at a position different from the starting position S of the collision type test (for example, near the center of the travelable range of the carriage 20). The test piece W is loaded on the workbench 21 of the carriage 20 at the starting position. When using the second support 60, the test piece W is held on the workbench 21 by the second support 60.

[0091] After loading the test piece W on the carriage 20 is completed, when a start test instruction is output to the interface unit 76 by the user's operation, continuous impact measurement is started by the acceleration sensor 742 installed on the carriage 20.

[0092] Secondly, each drive module 34 is controlled to drive the servo motor 342 according to the waveform data of the preset impact waveform (for example, acceleration waveform). The impact generated by each drive module 34 is transmitted to the vehicle frame 32 and the carriage 20 through the belt mechanism 35 and applied to the test piece W placed on the carriage 20.

[0093] Since an impact is applied to the specimen W, a force that causes the specimen W to fall forward, for example, acts on the specimen W. Therefore, the specimen W tilts forward. However, since the specimen W contacts the support 51 of the first support 50 disposed near the front end of the carriage 20, the specimen W is prevented from tipping over.

[0094] After an impact is applied to the specimen W, after a predetermined time, the measurement by the acceleration sensor 742 is stopped, and the specimen W is taken out from the carriage 20, and one non-collision type test is completed.

[0095] (Second Embodiment)

[0096] Next, a second embodiment of the present invention will be described. The impact test device 2000 of the second embodiment is one that can automatically move the first support. Hereinafter, the differences from the first embodiment will be mainly described, and the description of the components common to the first embodiment will be omitted.

[0097] Figure 7 It is a top view of the impact test device 2000 according to the second embodiment of the present invention. The first support 2500 of the impact test device 2000 includes: a support 2510; a rail portion 2520 that supports the support 2510 so as to be movable in the X-axis direction; and a support drive mechanism that drives the support 2510. The support drive mechanism includes: four drive modules 2540 (2540FL, 2540FR, 2540BL, 2540BR) that generate power for driving the support 2510; and two sets of belt mechanisms 2550 (2550R, 2550L) that transmit the power generated by the drive modules 2540 to the support 2510. The support 2510 is driven in the X-axis direction by the power generated by the drive modules 2540.

[0098] The four drive modules 2540 are respectively disposed near the four corners of the base 2. The left belt mechanism 2550L is driven by a pair of left drive modules 2540FL and 2540BL, and the right belt mechanism 2550R is driven by a pair of right drive modules 2540FR and 2540BR. In addition, since the configuration of the drive module 2540 is the same as that of the drive module 34 in the first embodiment, the description thereof is omitted.

[0099] The rail portion 2520 includes: a pair of roadbeds 2521 provided on the base 2 and extending in the X-axis direction; and a pair of linear guide rails 2522 respectively provided on each roadbed 2521. Each linear guide rail 2522 includes: a rail 2522a laid on the upper surface of the roadbed 2521; and a plurality (for example, two) of moving wheels 2522b that can travel on the rail 2522a. The moving wheels 2522b are installed on the lower surface of the foot portion 2511 of the support 2510. And the support 2510 is guided by the linear guide rails 2522 to move in the X-axis direction.

[0100] The belt mechanism 2550 includes: a pair of drive pulleys 2551; a toothed belt 2552 wound around the pair of drive pulleys 2551; and a belt clip 2553 (winding medium joint fixture) for fixing the toothed belt 2552 to the support body 2510. The drive pulley 2551 is coupled to the shaft 2544 of each drive module 2540. In the support body 2510, there is provided a flat plate-shaped clip mounting portion 2515 horizontally disposed and protruding outwardly to the left and right from each leg portion 2512. The toothed belt 2552 is mounted to the clip mounting portion 2515 by the belt clip 2553. The support body 2510 is driven in the front-rear (X-axis direction) by the power transmitted through the drive module 2540.

[0101] As Figure 6 shown, the control unit 72 is connected to the servo motors 2542 of the respective drive modules 2540 via the servo amplifiers 2542a. A rotary encoder RE is built into the servo motor 2542. The phase information of the shaft of the servo motor 2542 detected by the rotary encoder RE is input to the control unit 72 via the servo amplifier 2542a.

[0102] Hereinafter, two embodiments of the drive control of the support body 2510 of the first bracket 2500 of the impact test device 2000 according to the second embodiment of the present invention will be described.

[0103] (Embodiment 1)

[0104] Embodiment 1 automates the movement and fixation of the support body 51 of the first bracket 50 in the first embodiment. Specifically, before starting the impact test (for example, before placing the test piece W on the carriage 20), the control unit 72 synchronously controls the four drive modules (servo motors 2542) of the support body drive mechanism, and moves the support body 2510 to a specified position determined by the test conditions.

[0105] In the collision type test, the support body setting position is determined, for example, at a position in front of the carriage 20 adjacent to the front end of the range where the carriage 20 travels during the test (i.e., near the rear end of the impact generating device 40). In addition, in the non-collision type test, the support body setting position is determined, for example, at a position in front of the carriage 20 adjacent to the front end of the range where the carriage 20 travels during the test, or at a position behind the carriage 20 adjacent to the rear end. For example, when the sign of the maximum acceleration (or the integral value of the acceleration) of the impact waveform is positive (i.e., when a forward impact is applied), the support body setting position is determined in front of the travel range of the carriage 20, and when the sign is negative (i.e., when a backward impact is applied), the support body setting position is determined behind the travel range of the carriage 20.

[0106] In addition, in Example 1, during the test, the support 2510 is not driven and remains at the support installation position. In other words, the support drive mechanism functions as a fixing mechanism that releasably fixes the support 2510 to the base 2 during the test.

[0107] (Example 2)

[0108] In Example 2, during the test, the support 2510 is not kept stationary, but the carriage 20 and the support 2510 are driven while maintaining a substantially equal distance. Specifically, the control unit 72 synchronously controls the four drive modules 34 (specifically, servo motors 342) of the carriage drive mechanism and the four drive modules 2540 (specifically, servo motors 2542) of the support drive mechanism according to the impact waveform.

[0109] In addition, for the four drive modules 2540 of the support drive mechanism, the drive can also be controlled according to the impact waveform that has been subjected to smoothing processing (for example, simple moving average). By controlling the drive according to the impact waveform that has been subjected to smoothing processing, the acceleration applied to the support 2510 is alleviated, and the power consumption of the servo motor 2542 is reduced.

[0110] When adopting the various embodiments of the present invention described above, by separating the first brackets 50 and 2500 from the carriage 20, the increase in the weight of the carriage 20 and the air resistance during driving caused by adopting the anti-tipping mechanism is reduced, and the increase in the power required to drive the carriage 20 is reduced. Therefore, a motor with a smaller capacitance can be used to drive the carriage 20. In addition, since the reduction in the driving characteristics of the carriage 20 (for example, the accuracy and stability of the driving speed) and the change in the impact characteristics (for example, the impact waveform imparted to the test piece W) caused by adopting the anti-tipping mechanism are reduced, the reduction in the test accuracy is suppressed. In addition, in a non-collision type test, by suppressing the increase in the weight and / or air resistance of the carriage (impact table), a greater impact (acceleration) can be imparted to the test piece W.

[0111] The exemplary embodiments of the present invention are described above. The embodiments of the present invention are not limited to those described above and can be variously modified. Appropriately combining the configurations such as the embodiments explicitly illustrated in this specification and / or the configurations understood by those skilled in the art from the descriptions in this specification is also included in the embodiments of this application.

[0112] The above various embodiments are configured such that both collision type tests and non-collision type tests can be performed by separating the carriage 20 and the frame 32. However, the carriage 20 and the frame 32 can also be integrally formed as a device dedicated to non-collision type tests.

[0113] In the above-described various embodiments, the anti-tipping mechanism includes both the first bracket 50 (first bracket 2500) and the second bracket 60. However, the anti-tipping mechanism may also be configured to include only either the first bracket or the second bracket.

[0114] In the above-described various embodiments, the toothed belt 352 is wound around a pair of drive pulleys 351. However, one of the pulleys around which the toothed belt 352 is wound may be a driven pulley. In this case, neither the drive module 34FL (34FR) nor 34BL (34BR) is required. This configuration can also be applied to the belt mechanism 2550 of the support drive mechanism.

[0115] In the above-described various embodiments, the vehicle frame 32 is driven by two toothed belts 352. However, the vehicle frame 32 may also be configured to be driven by one or three or more toothed belts 352. This configuration can also be applied to the support drive mechanism.

[0116] Figure 8 It is a top view showing an example of a configuration in which the vehicle frame 32 is driven by four toothed belts 352. As Figure 8 shown, the lengths (number of teeth) of the respective toothed belts 352 may also be the same. By making the lengths of the toothed belts 352 the same, the transmission characteristics of the multiple toothed belts 352 can be made uniform, and the vehicle frame 32 can be driven more stably. This configuration can also be applied to the belt mechanism 2550 of the support drive mechanism. In addition, by arranging the adjacent drive modules 34 in the front-rear direction (i.e., staggering the positions in the front-rear direction), the volume of the impact test device can be reduced.

[0117] The pitch circle diameters (number of teeth) of the respective drive pulleys 351 may also be the same. In addition, the reduction ratios of the belt mechanisms 343 built in the respective drive modules 34 may be the same. Thus, since the ratio of the driving amount (rotation angle of the shaft 342b) of each servo motor 342 to the moving amount of the toothed belt 352 is equal, each servo motor 342 can be driven with the same driving amount. These configurations can also be applied to the support drive mechanism.

[0118] Figure 9 It is a schematic configuration diagram showing a modified example of the drive module 34. As Figure 9 shown, the drive module 34 may also include a plurality of (for example, two) servo motors 342. Figure 9 In the modified example of, the shafts 342b of a pair of servo motors 342 are respectively connected to both ends of the shaft rod 344 through couplings 346. Thus, one drive pulley 351 can be driven by a pair of servo motors 342. In addition, a configuration in which one shaft rod 344 is combined with a plurality of drive pulleys 351 (belt mechanism 35) may also be adopted. Since the ratio of the servo motors 342 to the drive pulleys 351 combined with the shaft rod 344 can be changed by this configuration, the performance of the servo motors 342 and the performance of the toothed belt 352 can be effectively utilized.

[0119] In the above-described embodiment, a linear member having rubber elasticity is used, but a linear member formed of a highly elastic material such as a polyamide resin or steel may also be used.

Claims

1. An impact testing device, characterized in that, Comprising: A trolley that can travel in a horizontal traveling direction and is loaded with a specimen; A trolley driving unit that drives the trolley; An impact generating device that collides with the trolley to generate an impact imparted to the specimen; and An anti-tipping mechanism that is independent of the impact generating device and prevents the specimen from tipping over after the trolley collides with the impact generating device, The anti-tipping mechanism includes a first mechanism independent of the trolley, The first mechanism can move in the traveling direction.

2. The impact testing device according to claim 1, characterized in that The first mechanism comprises: A support body that supports the specimen and prevents the specimen from tipping over when the specimen tilts; and A guiding mechanism that guides the support body to move in the traveling direction.

3. The impact testing device according to claim 2, characterized in that A base is provided, and the first mechanism is provided on the base, The first mechanism comprises a fixing mechanism that releasably fixes the support body relative to the base.

4. The impact testing device according to claim 3, characterized in that The first mechanism comprises a fixed guiding mechanism that serves as both the guiding mechanism and the fixing mechanism, The fixed guiding mechanism comprises: A T-shaped groove that is fixed relative to the base and extends in the traveling direction; A T-shaped groove nut that is embedded in the T-shaped groove; And A bolt that fixes the support body to the T-shaped groove by being embedded in the T-shaped groove nut through a through hole formed in the support body.

5. The impact testing device according to any one of claims 2 to 4, characterized in that The first mechanism comprises a support body driving mechanism that drives the support body in the traveling direction.

6. The impact testing device according to claim 5, characterized in that The support body driving mechanism comprises: A driving module that generates power for driving the support body; and A belt mechanism that transmits the power generated by the driving module to the support body.

7. The impact testing device according to claim 5 or 6, characterized in that A control unit is provided that controls the support body driving mechanism and the trolley driving unit, The control unit moves the support body to a specified position determined according to the test conditions.

8. The impact testing device according to claim 7, characterized in that The impact testing device can perform a collision-type test, which imparts an impact to the specimen by causing the trolley loaded with the specimen to collide with the impact generating device, The control unit controls the trolley driving unit in such a way that the trolley collides with the impact generating device at a specified speed.

9. The impact testing device according to claim 8, characterized in that The impact generating device comprises: A movable block; A first plastic programming device that is installed on the surface of the movable block opposite to the trolley; A block track portion that movably supports the movable block in the traveling direction; and A vibration absorber that absorbs the vibration of the movable block, The block track portion comprises a linear guide rail, The linear guide rail comprises: A track; and A driving wheel that is installed on the movable block and can travel on the track via a rotating body, The trolley is provided with a second plastic program device, which is installed on the surface opposite to the movable block.

10. The impact testing device according to any one of claims 1 to 9, characterized in that, The anti-tipping mechanism includes a second mechanism provided on the trolley. The second mechanism includes: Multiple struts that stand upright on the trolley; and A linear member that is spanned on the multiple struts.

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