Dolly device for vehicle collision test

Abstract

To provide a dolly device for vehicle collision test which can hold a traction rope further firmly and stably even in the case where the weight of an object to be towed becomes heavy and a tensile force during towing becomes larger.SOLUTION: A dolly device for vehicle collision test includes: a body frame; a vehicle connection part; and a traction rope mounting part for mounting a traction rope on the body frame by a first holding body and a second holding body each of which has a holding part. The first holding body includes a first portion and a second portion. The first portion is constituted so as to adjust a distance with the body frame by adjusting a fastening amount of an adjustment bolt, and a first inclined surface is formed which inclines with respect to the movement direction of the first portion. In the second portion, a second inclined surface coming into contact with the first inclined surface is formed, and according to the movement of the first portion by the adjustment bolt, the holding part slidably moves in the mounting direction approaching the second holding body.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a dolly apparatus for vehicle crash testing. [Background technology]

[0002] Conventionally, as a vehicle collision test in which a test vehicle is collided with a collision body, a method of towing the vehicle using a driving force such as a motor, and a method of towing the test vehicle using a weight are known. For example, Patent Document 1 discloses a vehicle collision test that includes a weight, a weight tower, a towing rope connected to the weight, and a vehicle towed via the towing rope, in which the weight is lifted to a predetermined height and then dropped to cause the traveling vehicle to collide at a planned collision point.

[0003] Patent document 2 describes the configuration of a towing device that connects a towing wire rope towed by a towing means to a vehicle, the towing device comprising a clamp device having a first clamp member fixed to a frame, a second clamp member rotatably supported so as to cooperate with the first clamp member to clamp the towing wire rope, and a lever member for clamping and releasing the towing wire rope by the second clamp member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-114384 A [Patent Document 2] JP 2012-242251 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, there is a tendency for the mass of test vehicles to increase as they become larger. In addition to tests in which a vehicle is collided with a collision body from the front or rear, there is also an increasing demand for so-called side impact tests in which a collision body is collided with the side of a vehicle. A typical example of a side impact test is a pole side impact test. In a pole side impact test, a low-floor dolly for transporting a vehicle is installed under a test vehicle facing to the side in the direction of travel, and the low-floor dolly and the test vehicle on top of it are simultaneously towed by a towing rope, and the test vehicle is collided with a semicircular pole collision body attached to the collision wall. In this case, the mass of the low-floor dolly is added to the test vehicle, resulting in a significant increase in mass. In Patent Document 2, the towing device is connected to the vehicle and clamps the towing wire rope to tow the vehicle, and the clamp of the towing wire rope is released just before the towed vehicle collides with the barrier, thereby aiming to improve the collision accuracy of the vehicle. However, as described above, when the weight of the test vehicle tends to increase or when the weight of the towed object becomes heavy in order to carry out the pole side collision test, the pulling force during towing becomes large, and there is a problem that the clamp of the towing wire rope by the towing device may come off when the vehicle is towed.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a dolly device for vehicle crash testing that can clamp the towing rope more firmly and stably even when the weight of the towed object becomes heavy or the tensile force during towing becomes large. [Means for solving the problem]

[0007] The above object of the present invention can be achieved by the following configuration. (1) A main body frame; A vehicle connection portion that connects the main body frame to a vehicle side; a towing rope attachment portion that attaches the towing rope to the main body frame by a first clamping body having a first clamping portion and a second clamping body having a second clamping portion, the first clamping body clamping a towing rope to be towed by a towing means, The first clamping body has a first portion fixed to the main body frame via an adjustment bolt, and a second portion supported by the first portion so as to be slidable in a direction perpendicular to the pulling direction of the towing rope, and the first clamping portion is provided in the second portion. the first portion is configured so that a distance between the first portion and the main body frame can be adjusted by adjusting a fastening amount of the adjustment bolt, and a first inclined surface is formed which is inclined with respect to a moving direction of the first portion; The second portion is formed with a second inclined surface that comes into contact with the first inclined surface, and the first clamping portion slides and moves in an attachment direction approaching the second clamping portion in response to the movement of the first portion by the adjustment bolt. Dolly rig for vehicle crash testing. Effect of the Invention

[0008] According to the present invention, the first clamping portion and the second clamping portion clamp the towing rope in a direction perpendicular to the towing direction, and the force for clamping the towing rope is imparted by the fastening force of the adjustment bolt, so that the towing rope can be clamped more firmly and stably even if the weight of the towed object increases or the tensile force during towing increases. Also, compared to the conventional technology in which the towing rope is clamped by a rotating clamp, the towing rope can be clamped from a direction that does not damage it, so wear on the towing rope can be significantly reduced. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a vehicle crash test device in which a dolly device according to an embodiment is used. [Diagram 2] FIG. 2 is a plan view of the main part showing a state in which a dolly on which a vehicle is placed is connected to the dolly apparatus. [Diagram 3] FIG. 3 is a right side view of the dolly device. [Figure 4] FIG. 4 is a front view of the dolly device. [Diagram 5] FIG. 5 is a side perspective view of the dolly device. [Figure 6]FIG. 6 is a front perspective view of the dolly device. [Figure 7] FIG. 7 is a model diagram showing the clamping state of the dolly device. [Figure 8] FIG. 8 is a model diagram showing the dolly device in an unlocked state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The configuration of a dolly device for vehicle crash testing to which the present invention is applied will be described below with reference to the accompanying drawings. Note that each drawing is created for the purpose of explaining the present invention, and the embodiment of the present invention is not limited to the contents shown in the drawings.

[0011] First, in order to grasp the overall picture of the dolly device to which the present invention is applied, a vehicle crash test device using the dolly device will be described with reference to Fig. 1. Fig. 1 is a schematic diagram of a vehicle crash test device using the dolly device according to the embodiment. Fig. 2 is a plan view of the main part showing a state in which a dolly on which a vehicle is placed is connected to the dolly device.

[0012] The collision test apparatus 1 includes a vehicle 11 , a dolly 12 , a towing rope 13 , a collision body 15 , collision body peripheral equipment 17 , a drop weight unit 20 , and a dolly device 30 . The collision test apparatus 1 is an apparatus that tows a vehicle 11 by a drop weight section 20 and a towing rope 13, and causes the vehicle 11 to collide with a collision body 15. The collision test apparatus 1 shown in Fig. 1 is of a drop weight horizontal towing type, in which the vehicle 11 is towed in a horizontal direction by dropping a drop weight 23. The dolly device 30 connects the towing rope 13, which is towed by the drop weight section 20, and the dolly 12 on which the vehicle 11 is placed, and guides the vehicle 11 toward the collision body 15.

[0013] In the following description, the up-down direction, width direction, and axial direction of the dolly apparatus 30 respectively refer to the directions of the dolly apparatus 30 when it is attached to the guide groove 14 formed in the ground along the towing direction of the vehicle 11, the width direction of the dolly apparatus 30 is the direction perpendicular to the towing direction of the vehicle 11 and the up-down direction of the dolly apparatus 30 and is also called the left-right direction, and the axial direction of the dolly apparatus 30 is the direction along the towing direction in which the vehicle 11 is towed and is also called the front-rear direction. In this case, the direction of the dolly apparatus 30 from the towing start position toward the collision body 15 is called the front, and the opposite direction is called the rear.

[0014] The vehicle 11 is a test vehicle (vehicle for testing) to be collided with the collision body 15. The vehicle 11 is an actual vehicle or a simulated vehicle. The vehicle 11 may be a passenger car, a truck, or, for example, a commercial vehicle. The vehicle 11 may be a railroad car. 2, the vehicle 11 is placed on a dolly 12 that slides along a towing direction. By towing the dolly 12 with a towing rope 13, the vehicle 11 is towed from a towing start position X0 to a collision position X1 where a collision body 15 is disposed.

[0015] The trolley 12 has a plate-shaped mounting platform 12A on which the vehicle 11 is placed, a pair of left and right connecting devices 12B, 12B to which a connecting rope 16 for connecting to the dolly device 30 is detachably connected, a plurality of buffer members 12C provided at the front end of the trolley 12, and a linear guide (not shown) arranged on the back side of the mounting platform 12A. Corresponding to the linear guides provided on the dolly 12, a pair of left and right guide rails 18, 18 extending from the towing start position toward the collision body 15 are provided on the ground G. The dolly 12 slides in the front-rear direction along the guide rails 18, 18 by the linear guides. Even if the dolly 12 is towed forcefully toward the collision body 15, the dolly 12 is unlikely to be damaged because, in the illustrated example, the four buffer members 12C come into contact and are crushed before the dolly 12 collides with the collision body 15. This allows the car 11 on the dolly 12 to collide with the collision body 15 with the momentum of being towed, while protecting the dolly 12. This configuration may be seen in FIG. 2.

[0016] The collision body 15 is what the vehicle 11 collides against. The collision body 15 includes, for example, a concrete barrier 15a and a collision test body 15b. The concrete barrier 15a is a concrete wall fixed to the ground G. The collision test body 15b is a collision attachment that meets various collision test standards, such as an attachment for diagonal collision, an attachment for offset collision, and an attachment for pole collision. The collision test body 15b may be, for example, a vehicle other than the vehicle 11, or a guardrail. The collision test body 15b does not necessarily have to be provided.

[0017] The collision object peripheral equipment 17 is equipment arranged around the collision object 15. The collision object peripheral equipment 17 includes, for example, a high-speed camera 17a and a lighting device 17b. The high-speed camera 17a is a device that captures an image of the collision between the vehicle 11 and the collision object 15. The lighting device 17b is a device that shines light on the vehicle 11 and the collision object 15.

[0018] The drop weight section 20 is a traction device (traction means) that drops a drop weight 23 to pull the towing rope 13. The drop weight section 20 includes a drop weight tower 21, a drop weight 23, a buffer device 25, a drop height control device 26, a lower pulley 27, and a movable pulley device 28.

[0019] The drop tower 21 is a tower for dropping a drop weight 23. A tower is a structure that is taller in the vertical direction than its width and depth in the horizontal direction. The drop weight 23 is a weight (weight) for towing a vehicle. The drop weight 23 is suspended from a suspension part 21a at the upper part of the drop weight tower 21 via a movable pulley device 28. The shock absorber 25 is a device that receives the falling weight 23. The shock absorber 25 is a device that absorbs the impact caused by the falling weight 23, and is disposed directly below the weight 23.

[0020] The falling weight height control device 26 is a device that controls (adjusts, changes) the falling height H of the falling weight 23. The falling height H of the falling weight 23 is the height (distance) that the falling weight 23 falls from when the falling weight 23 starts to fall to when the falling weight 23 ends (when the falling weight 23 contacts the buffer device 25). The drop height control device 26 controls the drop height H of the drop weight 23, thereby controlling the towing speed of the vehicle 11 determined from the drop height H, and thereby controls the collision speed of the vehicle 11. The collision speed of the vehicle 11 is the speed of the vehicle 11 when the vehicle 11 collides with the collision body 15.

[0021] The lower pulley 27 is disposed at a position closer to the drop tower 21 than the collision body 15, on the underground side of the ground G, and the towing rope 13 is hung on the lower pulley 27. The lower pulley 27 changes the extending direction of the towing rope 13 from the horizontal direction to the vertical direction.

[0022] The movable pulley device 28 is a pulley device that connects the hanging part 21a of the drop tower 21 and the drop weight 23. The movable pulley device 28 is a device for making the towing distance of the vehicle 11 longer than the falling distance of the drop weight 23 and for making the towing speed of the vehicle 11 faster than the falling speed of the drop weight 23.

[0023] The towing rope 13 is a rope (wire) having one end connected to the dolly 12 (or the vehicle 11) via the dolly device 30 and the other end connected to the hanging part 21a of the drop tower 21. The towing rope 13 transmits the falling motion (potential energy) of the drop weight 23 suspended from the drop tower 21 to the dolly 12, thereby towing the vehicle 11 in the horizontal direction.

[0024] The dolly device 30 is a towing device for smoothly towing the dolly 12 towed by the towing rope 13 along a guide groove 14 formed in the ground G. The dolly device 30 connects the carriage 12 and the towing rope 13. Specifically, the dolly device 30 has the towing rope 13 attached in a freely detachable manner, while the connecting rope 16 to which the carriage 12 is connected is detachably engaged.

[0025] The guide groove 14 is a groove formed in the ground G along which the vehicle 11 is towed. The guide groove 14 is formed straight from the towing start position X0 of the vehicle 11 toward the collision position X1 where the collision body 15 is placed. A pair of left and right guide rails 18, 18 are provided in the front-rear direction on both the left and right sides of the guide groove 14 for guiding the movement direction of the cart 12 pulled along the guide groove 14. This configuration can be seen in FIG. A pair of left and right guide rails 14a for guiding the dolly device 30 along the guide groove 14 are provided in the guide groove 14. This configuration may be seen in FIG.

[0026] As described above, in the collision test apparatus 1, when the towing rope 13 is pulled as the weight 23 falls, the dolly device 30 to which the towing rope 13 is attached is towed along the guide groove 14 from the towing start position X0 toward the collision position X1. This allows the vehicle 11 placed on the dolly 12 connected to the dolly device 30 to collide with the collision body 15 smoothly and reliably.

[0027] (Dolly device) Next, the configuration of the dolly device 30 will be described with reference to Fig. 2 to Fig. 6. Fig. 3 is a right side view of the dolly device. Fig. 4 is a front view of the dolly device. Fig. 5 is a side perspective view of the dolly device. Fig. 6 is a front perspective view of the dolly device.

[0028] The dolly device 30 comprises a main body frame 31, a towing rope attachment portion 40, a towing rope release portion 50, a connecting rope hooking portion 60, and a connecting rope release portion 70. The main body frame 31 is fitted into the guide groove 14 and is pulled along the guide groove 14. The towing rope attachment part 40 is provided on the lower part of the main body frame 31 and detachably clamps the towing rope 13 pulled by the drop weight 23. The connecting rope locking part 60 is provided on the upper part of the main body frame 31 and is a vehicle connecting part at which the connecting rope 16 to which the bogie 12 is connected is locked. Further, the towing rope attachment portion 40 is provided with a towing rope release portion 50 that automatically releases the clamping of the towing rope 13. The connecting rope fastening portion 60 is provided with a connecting rope release portion 70 that automatically releases the fastening of the connecting rope 16.

[0029] The main body frame 31 has a plate-shaped upper frame 32, a plate-shaped lower frame 33, guide rollers 34 journalled between the upper frame 32 and the lower frame 33, and buffer bodies 35 fixed to the front and rear ends.

[0030] The guide rollers 34 are journaled on vertical shafts that are provided to bridge between the upper frame 32 and the lower frame 33, and a plurality of them are arranged in the front-rear and left-right directions. In this embodiment, the guide rollers 34 include a first guide roller 34A, a second guide roller 34B, a third guide roller 34C, and a fourth guide roller 34D, which are arranged in the front-rear direction, and each guide roller 34 is provided in a pair on the left and right.

[0031] When the dolly apparatus 30 is installed in the guide groove 14, the upper frame 32 is disposed above the ground surface G. A connecting rope hooking portion 60 is provided on the upper surface of the upper frame 32. When the dolly apparatus 30 is installed in the guide groove 14, the lower frame 33 is disposed below (underground) the ground G. A towing rope attachment portion 40 is provided on the lower surface of the lower frame 33. As a result, the lower side of the dolly device 30 is disposed within the guide groove 14 underground, while the connecting rope hooking portion 60 is disposed near the surface of the ground G. Therefore, the dolly 12 (or the vehicle 11) to which the connecting rope 16 is connected can be pulled from a low position as close as possible to the ground G. According to this configuration, when the bogie 12 is pulled with a large force, it is possible to prevent vertical vibration from occurring in the bogie 12 and the vehicle 11 and prevent the front end from floating upward.

[0032] The buffer body 35 is attached so as to bridge the front ends of the upper frame 32 and the lower frame 33. This can reduce the impact when the dolly apparatus 30 towed by the towing rope 13 collides with the collision body 15 at the front end of the guide groove 14. This can prevent the dolly apparatus 30 and the guide groove 14 from being damaged during a collision test. It can also prevent the dolly apparatus 30 from coming off the guide groove 14 due to the impact of the collision.

[0033] The towing rope attachment portion 40 includes a first clamping body 41 and a second clamping body 42. The towing rope attachment portion 40 is located at the center of the main frame 31 in the front-rear direction and clamps the towing rope 13 in the front-rear direction, which is disposed below the lower frame 33 along the guide groove 14, from the left and right directions.

[0034] The first clamping body 41 has a first portion 43 fixed to the lower frame 33, and a second portion 44 supported so as to be slidable in the left-right direction relative to the first portion 43. The first portion 43 and the second portion 44 of the first clamping body 41 are formed as separate bodies.

[0035] The first portion 43 has an extending portion 43a and a first inclined surface 43b. The extension portion 43a is a block-shaped member that extends downward from the lower frame 33 and has its upper surface attached and fixed to the lower frame 33 via a vertical adjustment bolt 46. The vertical fixing position of the extension portion 43a can be adjusted to some extent by the amount of tightening of the adjustment bolt 46. In other words, a certain amount of space is provided between the upper surface of the extension portion 43a and the lower frame 33, and the distance between the upper surface of the extension portion 43a and the lower frame 33 can be finely adjusted by the adjustment bolt 46. This configuration can be seen in FIG. 6. The first inclined surface 43b is an inclined surface that is formed to protrude from the lower portion of the extending portion 43a so as to be inclined downward toward the left and right inner sides.

[0036] The second portion 44 is a block-shaped member formed in a rectangular shape that is long in the front-rear direction, and has second inclined surfaces 44a formed by cutting out the left and right outer sides of the lower portion. The second portion 44 is supported by the first portion 43 via a fixing bolt 47 in a state in which it can slide in the left-right direction. The second inclined surface 44a is placed on and comes into contact with the first inclined surface 43b of the first portion 43. Further, a first clamping portion 48A is provided on the left and right inner surfaces of the second portion 44, in which an arc-shaped groove portion is formed along the front-rear direction to clamp the left half portion of the towing rope 13. This configuration may be seen in Figs. 4 and 6.

[0037] The second clamping body 42 is a block-shaped member formed in a rectangular shape that is long in the front-rear direction and extends downward from the lower frame 33. Second clamping portions 48B are provided on the left and right inner surfaces of the second clamping body 42. The second clamping portion 48B is an arc-shaped recess that clamps the right half of the towing rope 13 along the front-rear direction. For this configuration, refer to Figures 4 and 6, etc.

[0038] The towing rope release part 50 has a support shaft 51 in the front-rear direction, a rotating shaft 52 in the up-down direction, and a towing rope release lever 53. For this configuration, refer to FIG.

[0039] The support shaft 51 is a support shaft in the front-rear direction that pivotally supports the upper end of the second clamping body 42 on the lower frame 33 side in a state in which the upper end of the second clamping body 42 can rotate upwardly toward the left and right outside. The pivot shaft 52 is a vertical shaft member provided to penetrate the upper frame 32 and the lower frame 33 , and extends below the lower surface of the lower frame 33 . The towing rope release lever 53 is provided on the lower end side of the rotating shaft 52 and is supported on the rotating shaft 52 so as to be rotatable in the horizontal direction.

[0040] According to the above, the towing rope release section 50 is configured to be switchable between a locked state in which the upward rotation of the second clamping body 42 is locked, and an unlocked state in which the lock on the second clamping body 42 is released, depending on the operating position of the towing rope release lever 53. More specifically, when the towing rope release lever 53 is operated to a predetermined lock position on the left or right outer side, a locked state is established in which the upward rotation of the second clamping body 42 is locked. This configuration can be seen in FIG. 7, which will be described later. On the other hand, when the towing rope release lever 53 is operated to rotate backward to a predetermined unlocked position, an unlocked state is established in which clamping of the towing rope 13 by the second clamping body 42 and the first clamping body 41 is released. This configuration can be seen in FIG. 8, which will be described later.

[0041] The connecting rope locking portion 60 is a block-shaped member located on the upper surface of the upper frame 32, toward the center in the fore-aft direction, and has a locking groove 61 formed on the front side that is U-shaped and recessed toward the rear. A connecting rope 16, both ends of which are connected to the coupling devices 12B, 12B of the dolly 12, is engaged in the locking groove 61. This allows the dolly device 30, which is towed by the towing rope 13, to be engaged (connected) with the dolly 12, so that the dolly 12 on which the vehicle 11 is placed can be towed. This configuration can be seen in FIG. 2.

[0042] The connecting rope release portion 70 has an opening / closing member 71, a rotating shaft 72, a connecting rope release lever 73, an operating piece 74, and a restricting piece 75. This configuration may be seen in FIG.

[0043] The pivot shaft 72 is a vertical shaft member provided to penetrate the upper frame 32 and the lower frame 33 , and extends below the lower surface of the lower frame 33 . The connecting rope release lever 73 is supported so as to be rotatable horizontally about the rotating shaft 72. The connecting rope release lever 73 is an operating tool that is disposed below the lower frame 33 and extends outward to the left and right. The operating piece 74 is journalled to the upper part of the pivot shaft 72 so as to pivot in response to the pivoting operation of the connecting rope release lever 73 , and is disposed in the space between the lower frame 33 and the upper frame 32 . The regulating piece 75 is a component that is attached and fixed to the upper surface of the lower frame 33 near the pivot axis 72, and is a component that regulates the rotation of the connecting rope release lever 73 by abutting against the operating piece 74 when the operating piece 74 rotates more than a predetermined amount in conjunction with the pivoting operation of the connecting rope release lever 73. The opening / closing member 71 is a member extending in the vertical direction, and is disposed within a notch 62 provided in the opening of the connecting rope engaging portion 60 .

[0044] According to the above, when the connecting rope release lever 73 is operated to the lock position facing outward to the left and right, the opening / closing member 71 is placed on the upper surface of the operation piece 74, and the connecting rope release part 70 is in a locked state in which the opening / closing member 71 closes the entrance of the locking groove 61 of the connecting rope hooking part 60. On the other hand, when the connecting rope release lever 73 is operated to the unlocked position by rotating backward from the locked position, the operation piece 74 rotates integrally around the rotation shaft 72 and abuts against the restriction piece 75. As a result, the opening / closing member 71 falls from the upper surface of the operation piece 74 onto the lower frame 33, and the connecting rope release part 70 is in an unlocked state in which the locking groove 61 of the connecting rope hooking part 60 is opened. This configuration can be seen in FIG. 5 and the like. This allows the connecting rope release section 70 to be switched, with a simple configuration, from a locked state in which the opening / closing member closes the opening of the connecting rope engagement section 60 to an unlocked state in which the opening of the connecting rope engagement section 60 is opened.

[0045] (Action and Effects) Next, the action and effect of the dolly device 30 will be described with reference to Fig. 2 to Fig. 8. Fig. 7 is a model diagram showing the clamping state of the dolly device. Fig. 8 is a model diagram showing the unlocked state of the dolly device.

[0046] A method of attaching the towing rope 13 to the towing rope attachment portion 40 will be described. First, the towing rope release lever 53 is operated to the lock position, and the second clamping body 42 is switched to a locked state in which its upward swing is restricted. Next, by adjusting the amount of fastening of the adjustment bolt 46, the fixed position of the first portion 43 of the first clamping body 41 is gradually moved upward and closer to the lower frame 33. Accordingly, the second portion 44 gradually slides toward the inside in the left-right direction (also referred to as the attachment direction or clamping direction) perpendicular to the front-rear direction which is the pulling (extending) direction of the towing rope 13. That is, the first clamping portion 48A of the first clamping body 41 can be brought close to the second clamping portion 48B of the second clamping body 42 while sliding in a direction perpendicular to the pulling direction of the towing rope 13. Therefore, the dolly apparatus 30 can be brought into a clamping state in which the towing rope 13 is firmly and stably clamped by the towing rope attachment portion 40. This configuration may be seen in FIG. 7.

[0047] Specifically, the second portion 44 slides in a direction perpendicular to the first inclined surface 43b and the second inclined surface 44a such that the second inclined surface 44a is pushed out by the first inclined surface 43b of the first portion 43. Therefore, the second portion 44 clamps the towing rope 13 by sliding obliquely upward toward the inside on the left and right. Therefore, a line connecting the centers of the arc-shaped grooves formed in the first clamping portion 48A and the second clamping portion 48B is inclined and coincides with the sliding direction of the second portion 44, in other words, the direction perpendicular to the first inclined surface 43b and the second inclined surface 44a. This configuration can be seen in FIG. 4. According to this configuration, the force clamping the towing rope 13 due to the sliding movement of the second part 44 by adjusting the tightening amount of the adjustment bolt 46 acts efficiently on the towing rope 13, so that the towing rope 13 can be clamped more firmly.

[0048] In addition, a contact body (not shown) for releasing the towing rope is provided in the guide groove 14 of the collision test device 1 near the collision position X1, which comes into contact with the towing rope release lever 53 operated to the locked position, thereby rotating the towing rope release lever 53 backward to the unlocked position. As a result, when the dolly apparatus 30 is towed to a position where a contact body is located near the collision position X1, the towing rope release lever 53 is automatically operated from the locked position to the unlocked position.

[0049] That is, the dolly apparatus 30 can automatically release the clamping of the towing rope 13 by the towing rope attachment portion 40 by the towing rope release portion 50 immediately before colliding with the collision body 15 . According to this configuration, the problem of the towing rope 13 continuing to tow the dolly device 30 after the vehicle 11 on the dolly 12 collides with the collision body 15 can be eliminated.

[0050] Similarly, in the guide groove 14 of the collision test device 1, a contact body (not shown) for releasing the connecting rope is provided near the collision position X1, which comes into contact with the connecting rope release lever 73 operated to the locked position, thereby rotating the connecting rope release lever 73 backward to the unlocked position. As a result, when the dolly apparatus 30 is towed to a position where a contact body is located near the collision position X1, the connecting rope release lever 73 of the connecting rope release section 70 is automatically operated from the locked position to the unlocked position.

[0051] In other words, the dolly apparatus 30 can automatically release the connection of the connecting rope 16 held by the connecting rope holding unit 60 by the connecting rope release unit 70 immediately before colliding with the collision body 15 . According to this configuration, it is possible to eliminate the problem that the connecting rope 16 continues to pull the cart 12 after the vehicle 11 on the cart 12 collides with the collision body 15.

[0052] In addition, the towing rope release lever 53 and the connecting rope release lever 73 are offset in the vertical direction when viewed from the front. Therefore, the contact body that operates the towing rope release lever 53 and the contact body that operates the connecting rope release lever 73 can be separately disposed at any position on the guide groove 14 side. This makes it possible for the dolly device 30 to easily adjust the position where the clamping of the towing rope 13 is released and the position where the engagement with the connecting rope 16 is released.

[0053] Second embodiment In the above-described collision test apparatus 1, the vehicle 11 is caused to collide with the collision body 15 by towing the dolly 12 on which the vehicle 11 is placed, but it is also possible to configure the dolly device 30 to be connected to the front end of the vehicle 11 and to directly tow the vehicle 11 with the towing rope 13. With this configuration, the dolly 12 and the guide rails 18, 18 along the guide groove 14 are not required, so costs can be kept low.

[0054] In this case, a connecting jig (not shown) for connecting the connecting rope 16 that is engaged with the dolly apparatus 30 is attached to the front end of the vehicle 11. The connecting jig is attached and fixed to both ends of the connecting rope 16 near the ground G of the vehicle 11 and on both the left and right sides of the vehicle. This allows the dolly apparatus 30 and the vehicle 11 to be connected via the connecting rope 16, similar to the first embodiment.

[0055] By providing the connecting jig having this configuration, both ends of the connecting rope 16 that directly tows the vehicle 11 are fixed at positions closer to the ground G and on both the left and right sides, so that even if the vehicle 11 is towed with a strong pulling force, the front end of the vehicle 11 is less likely to shake in the vertical direction, and the vehicle can be towed more smoothly.

[0056] The present invention is not limited to the above-described embodiments, and the present invention also contemplates the mutual combination of the various components of the embodiments, as well as modifications and applications by those skilled in the art based on the description in the specification and well-known technologies, and these are included in the scope of protection sought.

[0057] As described above, the present specification discloses the following: (1) A main body frame; A vehicle connection portion that connects the main body frame to a vehicle side; a towing rope attachment portion that attaches the towing rope to the main body frame by a first clamping body having a first clamping portion and a second clamping body having a second clamping portion, the first clamping body clamping a towing rope to be towed by a towing means, The first clamping body has a first portion fixed to the main body frame via an adjustment bolt, and a second portion supported by the first portion so as to be slidable in a direction perpendicular to the pulling direction of the towing rope, and the first clamping portion is provided in the second portion. the first portion is configured so that a distance between the first portion and the main body frame can be adjusted by adjusting a fastening amount of the adjustment bolt, and a first inclined surface is formed which is inclined with respect to a moving direction of the first portion; The second portion is formed with a second inclined surface that comes into contact with the first inclined surface, and the first clamping portion slides and moves in an attachment direction approaching the second clamping portion in response to the movement of the first portion by the adjustment bolt. Dolly rig for vehicle crash testing. With this configuration, one-sided contact between the first clamping body and the second clamping body and the towing rope can be prevented, ensuring the contact area and frictional force, and the towing rope can be clamped by the tightening force of the adjustment bolt, so that the towing rope can be clamped more firmly and stably even if the weight of the towed object becomes heavier or the tensile force during towing becomes greater.

[0058] (2) The first inclined surface and the second inclined surface are inclined at 45 degrees with respect to the moving direction of the second portion. A dolly device for vehicle crash testing as described in (1). With this configuration, the tightening force of the adjustment bolt can be efficiently transmitted to the second portion.

[0059] (3) The first clamping body and the second clamping body are elongated along the extending direction of the towing rope. A dolly device for vehicle crash testing as described in (1) or (2). According to this configuration, the contact area and frictional force between the first clamping portion and the second clamping portion and the towing rope being clamped can be increased, so that the towing rope can be clamped more firmly.

[0060] (4) The first clamping portion and the second clamping portion are formed with an arc-shaped groove portion that conforms to the cross-sectional shape of the towing rope. A dolly device for vehicle crash testing according to any one of (1) to (3). According to this configuration, the contact area and frictional force between the first clamping portion and the second clamping portion and the outer circumferential surface of the towing rope can be increased, so that the towing rope can be clamped more firmly. [Explanation of symbols]

[0061] 1. Crash test equipment 11 Vehicles 12 Trolley 12A Mounting stand 12B Coupling device 12C Cushioning material 13 Towing rope 14 Guide groove 14a Guide rail 15 Collider 15a Concrete Barrier 15b Crash test specimen 16 Connecting rope 17 Impactor peripherals 17a High-speed camera 17b Lighting equipment 18 Guide rail 20 Falling weight section 21 Falling Weight Tower 21a Hanging part 23 Falling Weight 25 Shock absorber 26 Control device 27 Lower Pulley 28 Moving pulley device 30 Dolly device 31 Main frame 32 Upper Frame 33 Lower Frame 34 Guide roller 34A First guide roller 34B 2nd guide roller 34C 3rd guide roller 34D 4th guide roller 35 Buffer 40 Towing rope attachment 41 First clamping body 42 Second clamping body 43 Part 1 43a Extension 43b 1st slope 44 Part 2 44a 2nd slope 46 Adjustment bolt 47 Fixing bolt 48A 1st clamping part 48B 2nd clamping part 50 Towing rope release part 51 Support shaft 52,72 Rotating shaft 53 Towing rope release lever 60 Connecting rope fastening part (vehicle connecting part) 61 Locking groove 70 Connection rope release part 71 Opening and closing parts 73 Connecting rope release lever 74 Operation piece 75 Regulatory piece X0 Towing start position X1 Collision position

Claims

1. A body frame, A vehicle connection portion that connects the main body frame to a vehicle side; a towing rope attachment portion that attaches the towing rope to the main body frame by a first clamping body having a first clamping portion and a second clamping body having a second clamping portion, the first clamping body clamping a towing rope to be towed by a towing means, The first clamping body has a first portion fixed to the main body frame via an adjustment bolt, and a second portion supported by the first portion so as to be slidable in a direction perpendicular to the pulling direction of the towing rope, and the second portion is provided with the first clamping portion, the first portion is configured so that a distance between the first portion and the main body frame can be adjusted by adjusting a fastening amount of the adjustment bolt, and a first inclined surface is formed which is inclined with respect to a moving direction of the first portion; the second portion is formed with a second inclined surface that comes into contact with the first inclined surface, and the first clamping portion slides and moves in an attachment direction approaching the second clamping portion in response to the movement of the first portion by the adjustment bolt. Dolly rig for vehicle crash testing.

2. The first inclined surface and the second inclined surface are inclined at 45 degrees with respect to the moving direction of the second portion.

2. A dolly apparatus for vehicle crash testing according to claim 1.

3. The first clamping body and the second clamping body are elongated along the extension direction of the towing rope.

2. A dolly apparatus for vehicle crash testing according to claim 1.

4. The first clamping portion and the second clamping portion are formed with an arc-shaped groove portion that follows the cross-sectional shape of the towing rope.

2. A dolly apparatus for vehicle crash testing according to claim 1.

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