JP2011047728A - Drop testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve efficiency in testing by quickly and easily performing suspension work of an object to be tested when performing a drop test repeatedly and continuously. <P>SOLUTION: A drop testing device 1 comprises: a base 3 including a landing surface 2; a post 4 erected from the base 3; and a protection member 11 provided at an upper portion of the post 4. The protection member 11 includes: a first guide sheave 6 for guiding a suspension wire 5 suspended by a take-up motor 14; and a second guide sheave 9 that is constantly connected to a vehicle 7 and guides a suspended or falling messenger wire 8 together with this vehicle 7. The suspension wire 5 includes a clamp member 12 that is detachably connected to a connection member 10 mounted to the vehicle 7 and can travel along the messenger wire 8. In a drop test of the vehicle 7, the clamp member 12 is descended along the messenger wire 8 to the dropped vehicle 7. When the clamp member 12 reaches a position where the clamp member 12 can be connected to the connection member 10, they are connected each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement of a drop test apparatus for performing a drop test of a vehicle such as a motorcycle or an automobile as a test object.

  A vehicle such as a motorcycle or automobile as a test object may be subjected to a drop durability test in which the vehicle is repeatedly dropped from a height of 1.5 m or 10 m and the durability is inspected depending on the purpose of use.

  As a drop test apparatus for that purpose, various proposals have conventionally been proposed. Among them, for example, one disclosed in Patent Document 1 can be exemplified.

  The test apparatus includes a front wheel holding means for holding the front wheel in a grounded state, and the rear part of the vehicle body is lifted until the rear wheel reaches an arbitrarily set height position, and the rear part of the vehicle body is dropped at a substantially free fall speed from the lifted position. And an adjustable vehicle body lifting and dropping means, and an adjustable throttle valve opening / closing operation means for rotating the rear wheel until an arbitrary set speed is reached in the lifted state.

  According to this test apparatus, the lifting height of the rear wheel is set so as to generate a torsion torque equal to the torsion torque applied to the final shaft, and at the same time, the vehicle body is dropped while rotating the rear wheel at the set speed, thereby allowing the main stand to This makes it possible to perform a simulation close to the actual starting method in which the engine is started and suddenly started, and the endurance test can be performed by automatically and uniformly applying a uniform load to the final shaft.

  However, this test apparatus does not perform the durability test by dropping the vehicle body itself. Examples of the apparatus for dropping the vehicle body itself include those shown in Patent Document 2.

  The test apparatus includes a mechanism for holding the test sample at an arbitrary height, a mechanism for releasing the test sample and dropping the test sample, and dropping the test sample together with the test sample at the top of the test sample. A posture control member that holds the posture of the sample falling constant, a mechanism that holds the posture control member, and a mechanism that separates the posture control member from the test sample and stops before the test sample collides with the floor surface. A drop impact test is performed by causing the test sample to collide with the floor surface.

  In addition, this test apparatus drops a printed wiring board or a portable device on which a semiconductor device is mounted, and evaluates the reliability of a solder connection part or an adhesion part, but the basic configuration is the above-described motorcycle or automobile. It can be applied to a vehicle drop impact test apparatus such as the above.

  Therefore, according to this test apparatus, the test sample falls at the same time as the posture control member, so that the posture of the test sample can be kept stable until just before it collides with the floor surface. There is an advantage that can be reduced.

Japanese Patent Laid-Open No. 3-21440 (See Claims, FIG. 1) JP 2002-318181 A (refer to paragraph 0038, FIG. 1, FIG. 3 and FIG. 4 in the specification)

  However, in the test apparatus described above, since the posture control member is dropped simultaneously with the test sample, a mechanism for separating only the posture member before the test sample collides with the floor surface is necessary, and an extra mechanism is necessary. This increases the complexity and size of the device, which in turn increases costs.

  In addition, when performing drop tests repeatedly and continuously, it is necessary for the operator to suspend and integrate both the posture control member and the test sample at an arbitrary height. In addition to being troublesome, it requires a long working time for preparation and the test efficiency is low.

  Accordingly, the present invention has been made in view of the above-described circumstances, and the object of the present invention is to suspend the test object when performing the drop test of the test object repeatedly and continuously. An object is to provide a drop test apparatus that can be shortened to improve test efficiency and is optimal for expecting improved versatility.

  In order to achieve the above-described object, the configuration of the drop test apparatus according to the present invention includes a base provided with a landing surface, a base frame erected from the base, and a holding member provided on the upper part of the base frame. A first guide sheave configured to guide the lifting wire that is lifted by the lifting member, and a second guide sheave that is always connected to the device under test and guides the guide wire that is lifted or dropped together with the device under test; The lifting wire is detachably connected to a connecting member attached to the device under test, and a clamp member movable along the guide wire is provided, and the clamp member and the connecting member are connected to each other. During the drop test of the released test object, the clamp member is lowered along the guide wire with respect to the test object dropped on the landing surface. Upon reaching a serial connection member and capable coupling position, and it becomes possible to perform the coupling operation of each other.

  In the drop test device of the present invention, when the clamp member is lowered along the guide wire with respect to the vehicle that has fallen on the landing surface during the drop test, the clamp member reaches a position where it can be connected to the connecting member. Since the mutual connection operation is performed, for example, when performing drop tests repeatedly and continuously, preparation work for lifting as shown in the conventional example can be performed in a short time.

  Therefore, according to the drop test apparatus of the present invention, a drop test with good test efficiency can be performed by shortening the preparation time for lifting the device under test.

It is a partially broken front view of the drop durability test device by one embodiment of this invention. It is a front view which expands and shows the front-end | tip part of the holding member in FIG. It is a side view which expands and shows the front-end | tip part of the holding member in FIG. In FIG. 2, it is a partial front view which shows the state which a pair of clamping piece of the clamp member opened. In FIG. 2, it is a top view which shows the connection state of a clamp member and a connection wire. It is a front view which expands and shows the base end part of the holding member in FIG. It is a partial front view which shows the base end part of the guide wire in FIG.

  The present invention will be described below on the basis of the illustrated embodiment. The illustrated embodiment embodies the present invention in a drop durability test apparatus for performing a drop durability test of a vehicle such as an automobile to be tested.

  As shown in FIGS. 1 to 3, the drop durability test apparatus 1 according to the illustrated embodiment includes a base 3 having a landing surface 2, a base frame erected from the base 3, and an upper part of the base frame. The holding member is provided with a first guide sheave 6 that guides the lifting wire 5 that is lifted by the lifting member, and a guide wire that is always connected to the vehicle 7 and is lifted or dropped together with the vehicle 7. A second guide sheave 9 is provided, and the lifting wire 5 is detachably connected to a connecting member 10 attached to the vehicle 7 and is provided with a clamp member 12 movable along the guide wire. The clamp member 12 is lowered along the guide wire with respect to the vehicle 7 that has fallen on the landing surface 2 during a drop test of the vehicle 7 that has released the connection between the link member 12 and the connection member 10. When the clamp member 12 reaches the connectable position with the coupling member 10, performs the connection operation of each other.

  In more detail below, the base frame is composed of four columns (only two are shown in FIG. 1) 4 erected from the base 3. A holding member is provided.

  The holding member is composed of an upper frame 11a and a lower frame 11b, and a connecting frame 11c that connects both the frames 11a and 11b. The upper base end of the upper frame 11a (referring to the left side in FIG. 1) A winding motor 14 is mounted as a lifting member.

  A wire drum (not shown) is connected to the take-up motor 14, and the lifting wire 5 is wound around the wire drum. The lifting wire 5 has two independent wires as shown in FIG. The tip 5 is coupled to the clamp member 12 via a first guide sheave 6 provided at the top tip (referred to the right side in FIG. 1) of the upper frame 11a.

  As shown in FIGS. 2 to 5, the clamp member 12 is an electromagnetic clamp having a cylindrical main body 12a and a clamp portion 12b provided on the lower surface of the main body 12a. An arc-shaped coupling portion 13 for coupling the lifting wire 5 is provided.

  The clamp portion 12b is composed of a pair of semi-circular clamping pieces 16 whose ends are opened and closed around the rotation shaft 12c at the base end by an electric signal. The clamp portion 12b opens and closes in a loop shape which will be described later. The leading end of the sandwiching piece 16 is inserted into the eye of the formed nylon sling to allow connection or release with each other.

  A second guide sheave 9 is provided on the lower tip side of the upper frame 11a, and a third guide sheave 19 is provided on the lower base end side of the lower frame 11b as shown in FIG. The sheaves 9 and 19 are guided with the messenger wire 8 as the guide wire.

  As shown in FIG. 3, the second guide sheave 9 is provided on both sides of the first guide sheave 6 on the lower end side of the upper frame 11a, and two sets of second and third sets are provided. The messenger wires 8 are guided to the sheaves 9 and 19, respectively, and each messenger wire 8 is formed of a material that is thinner and lighter than the lifting wire 5.

  The two messenger wires 8 are arranged so that their base ends are movable up and down via a third guide sheave 19, and the tips protrude from both sides of the second guide sheave 9 and the main body 12 a of the electromagnetic clamp 2. Each of them is connected to the vehicle 7 through a pair of tubular guide members 12d.

  A connecting tool 20 for connecting to the vehicle 7 is provided at the tip of the messenger wire 8. In the illustrated embodiment, a pair of upper and lower connecting pieces are connected with bolts or the like (not shown). Thus, the vehicle 7 is connected.

  Further, as shown in FIG. 3, a magnet 21 is attached near the tip of one of the two messenger wires 8, and a reed switch 12e provided on the lower surface of the main body 12a of the electromagnetic clamp. When it opposes, the close signal which instruct | indicates to close a pair of clamping piece 16 of an electromagnetic clamp is output.

  The attachment position of the magnet 21 to the messenger wire 8 is set to a position facing the reed switch 12e only when the clamping piece 16 of the electromagnetic clamp faces the eye 18a of the nylon sling 18.

  As shown in FIG. 7, a lower end piece 23 also serving as a weight is fixed to the base end of the messenger wire 8 by bolting or the like, and when the vehicle 7 is lifted upward, the messenger wire 8 moves downward. Move smoothly.

  Further, as shown in FIGS. 6 and 7, a buffer member 25 having a coil spring 24 disposed at the lower end is provided below the third guide sheave 19 in the lower frame 11b, and the buffer member 25 itself. Further, since the lower end piece 23 abuts vigorously when the vehicle 7 is dropped, the coil spring 24 and the buffer member 25 themselves exhibit a buffering action.

  As shown in FIGS. 1 and 6, a wire tension device 27 in which the messenger wire 8 is wound around a distal device-side sheave 26 is provided on the proximal end side of the connection frame 11c. In response to an instruction from the controller, the cylinder is expanded and contracted to give the messenger wire 8 tension (shown by a solid line device side sheave 26 in FIG. 6) or relaxation (shown by a two-dot chain line device side sheave 26 in FIG. 6).

  As shown in FIGS. 2 and 6, a fourth guide sheave 28 is provided on the lower distal end side of the lower frame 11b, and a fifth guide sheave 30 is provided on the lower proximal end side. The power feeding cable 29 extending from the side is arranged downward as the cabel bear via the fourth and fifth guide sheaves 28, 30 so that it can be moved up and down.

As shown in FIGS. 1 and 5, guide wires 31 extending in the vertical direction are provided on the inner side of each of the columns 4, and these guide wires 31 have connection ends whose base ends are fixed to electromagnetic clamps. The tip of 32 is connected so that movement along this guide wire 31 is possible.

  The connecting wire 32 is set so as to maintain a predetermined length and tension so that the length of the connecting wire 32 does not become slack when the vehicle 7 is lifted, and the connecting wire 32 moves along the guide wire 31 when the vehicle 7 is lifted. The wire 32 prevents the vehicle 7 from rising while wobbling.

  By the way, as shown in FIGS. 2 and 3, the connecting member 10 attached to the vehicle 7 side is arranged side by side between the above-mentioned connecting tools 20 and has a pair of upper and lower parts provided with a semicircular arc-shaped attachment surface on the inside. The connecting piece 10a, 10b and the nylon sling 18 attached to the upper connecting piece 10a in a loop shape are inserted between the pair of connecting pieces 10a, 10b. It is fixed with respect to the vehicle 7 by bolting (not indicated).

  The nylon sling 18 is made of synthetic resin and filled with a material having elasticity and shape retention function such as a Piano wire or a leaf spring (not shown). The eye 18a is held in a circular shape so that the end of the clamping piece 16 can be easily inserted into the eye 18a.

  The operation of the drop durability test apparatus 1 configured as described above will be described. First, the pair of connectors 20 and the connection member 10 are arranged on the vehicle mounting portion 34 that is a predetermined position of the vehicle 7 that performs the drop durability test. Install.

  In this state, the messenger wire 8 is connected to the vehicle 7 by the pair of connecting members 20 arranged on both sides of the connecting member 10, and the cylinder of the wire tensioning device 27 is contracted to relax the messenger wire 8. 1 (see the vehicle 7 indicated by the two-dot chain line in FIG. 1), the cylinder of the wire tensioning device 27 is extended to tension the messenger wire 8.

  Thereafter, when the winding motor 14 is driven to lower the lifting wire 5, the electromagnetic clamp coupled to the tip of the lifting wire 5 is lowered along the messenger wire 8.

  When the electromagnetic clamp is lowered and the reed switch 12e provided on the lower surface of the main body 12a faces the magnet 21 provided on the messenger wire 8, a close signal is output and a pair of clamps of the electromagnetic clamp that has been previously opened is held. Close piece 16.

  Then, since the tip end of the sandwiching piece 16 is inserted into the eye 18a of the nylon sling 18 formed in a loop shape by the closing operation of the clamp portion 12b and is closed, they are connected to each other.

  Next, when the winding motor 14 is driven to wind the lifting wire 5, the vehicle 7 is lifted to a predetermined lifting position while lowering the proximal end of the messenger wire 8 (see the vehicle 7 indicated by the solid line in FIG. 1). ).

  At this time, the connecting wire 32 that connects the electromagnetic clamp and the guide wire 31 prevents wobbling when the vehicle 7 is lifted.

  In addition, since the lower end piece 23 that also serves as a weight is provided at the base end of the messenger wire 8, the messenger wire 8 moves smoothly downward when the vehicle 7 is lifted upward, and this lifting operation Will not interfere.

  Thereafter, when the cylinder of the wire tensioning device 27 is contracted to loosen the messenger wire 8, preparation for a drop durability test is made.

  Therefore, when an opening signal for opening the pair of clamping pieces 16 of the electromagnetic clamp is output from a control device (not shown), the connection between the vehicle 7 and the electromagnetic clamp is released, and the vehicle 7 starts to fall freely.

  When the vehicle 7 falls on the landing surface 2, it falls while pulling the messenger wire 8 attached to the vehicle 7, but the messenger wire 8 is made of a lighter and thinner material than the lifting wire 5. It does not prevent the free fall described above.

  The vehicle 7 that has fallen on the landing surface 2 operates the wire tensioning device 27 to tension the messenger wire 8 as described above, and then drives the winding motor 14 to drive the lifting wire 5 to the messenger wire 8. Lower along.

  When the lifting member 5 is lowered, the clamp member 12 is lowered, and when the reed switch 12e provided on the lower surface of the main body 12a faces the magnet 21 provided on the messenger wire 8, a closing signal is output and a pair of electromagnetic clamps are output. The clamping piece 16 is closed.

  Then, the ends of the pair of sandwiching pieces 16 are inserted into the eye 18a of the nylon sling 18 formed in a loop shape and closed, so that the vehicle 7 is connected to each other, that is, the lifting wire 5. The

  Accordingly, when the winding motor 14 is driven and the lifting wire 5 is wound up in this state, the vehicle 7 is lifted to a predetermined lifting position, that is, a drop durability test start position, so that the drop durability test is immediately repeated. Can be performed.

  As described above in detail, according to the drop durability test apparatus 1 of the present invention, when the clamp member 12 is lowered along the messenger wire 8 with respect to the vehicle 7 dropped on the landing surface 2 during the drop durability test. When the reed switch 12e provided on the electromagnetic clamp faces the magnet 21 provided on the messenger wire 8, a close signal is output and the pair of sandwiching pieces 16 of the electromagnetic clamp are closed, so that the messenger wire 8 and the vehicle 7 can be automatically connected.

  Therefore, when performing the drop durability test repeatedly and continuously, preparation work for lifting as shown in the conventional example can be performed in a short time, so the preparation time described above can be reduced. Test efficiency can be increased.

  In addition, since the winding motor 14 is placed on the upper support column side of the upper frame 11a and the first guide sheave 6 is provided on the upper tip side of the upper frame 11a, the parts related to the winding device are compactly gathered in one place. Can be arranged.

  Since the two independent wires are used as the lifting wire 5, for example, even if one lifting wire 5 is cut, the vehicle 7 does not suddenly fall and the safety is high.

  In addition, since two messenger wires 8 are used and the electromagnetic clamp moves between these messenger wires 8, the electromagnetic clamp rotates or shifts to one messenger wire 8 side. This can be prevented, and the clamp portion 12b can be reliably and repeatedly arranged at a position facing the eye 18a of the nylon sling 18.

  Furthermore, since the messenger wire 8 is made of a material that is thinner and lighter than the lifting wire 5, even if it is always connected to the vehicle 7, for example, this free-falling movement is not hindered during a drop durability test of the vehicle 7. .

  In addition, since the nylon sling 18 is used and the inside thereof is filled with a material having elasticity and shape retention function such as a Piano wire or a leaf spring, the nylon sling 18 always maintains the eye 18a in a circular shape. can do.

  Therefore, the clamping piece 16 constituting the clamp portion 12b of the electromagnetic clamp can be surely inserted into the eye 18a, and the drop durability test can be repeatedly and automatically performed with peace of mind.

  Furthermore, the lower end piece 23 that also serves as a weight is fixed to the base end of the messenger wire 8 with bolts or the like, so that the messenger wire 8 moves smoothly downward along the column 4 when the vehicle 7 is lifted upward. Therefore, the messenger wire 8 does not hinder the work when the vehicle 7 is lifted.

  Then, a buffer member 25 having a coil spring 24 disposed at the lower end is provided below the third guide sheave 19 in the lower frame 11b, and the buffer member 25 itself is also formed of an elastic material. Even when the lower end piece 23 abuts vigorously at the time of falling, the above-described coil spring 24 and the buffer member 25 itself can exhibit an excellent buffering action.

  Therefore, it is possible to provide the drop durability test apparatus 1 having durability that does not cause damage or the like even if the above-described drop durability test is repeated.

  In addition, a guide wire 31 extending in the vertical direction is provided inside each of the support columns 4, and a distal end of a connection wire 32 having a proximal end fixed to an electromagnetic clamp is provided along the guide wire 31. Since the vehicle 7 is connected in a state where it is somewhat tensioned, when the vehicle 7 is lifted, it is possible to reliably prevent the vehicle 7 from rising while being staggered.

  In the illustrated embodiment, the positional relationship between the magnet 21 provided on the messenger wire 8 and the reed switch 12e provided on the clamp member 12 is recognized. However, the present invention is not limited to this configuration. Of course, other sensors may be used.

  In the present embodiment, the clamp member 12 also uses an electromagnetic clamp. However, it goes without saying that a clamp using another hydraulic pressure or a clamp using another mechanical structure may be adopted.

  This makes it possible to shorten the time required for lifting the vehicle and to improve the test efficiency when repeatedly performing drop tests on the vehicle to be tested.

DESCRIPTION OF SYMBOLS 1 Drop endurance test apparatus 2 Landing surface 3 Base 4 Support | pillar which comprises base frame 5 Lifting wire 6 1st guide sheave 7 Vehicle which is a to-be-tested object 8 Messenger wire which is a guide wire 9 2nd guide sheave 10 Connection member 10a Upper connection piece 10b Lower connecting piece 11a Upper frame as a holding member 11b Lower frame as a holding member 11c Connecting frame as a holding member 12a Main body as a clamping member 12b Clamping part constituting the clamping member 12c Rotating shaft 12d Guide member 12e Reed switch 13 Connecting tool 14 Winding motor as lifting member 16 Nipping piece 18 Nylon sling 18a Eye 21 Magnet

Claims (9)

  A base provided with a landing surface, a base frame erected from the base, and a holding member provided on an upper portion of the base frame, the first holding the lifting wire that is lifted by the lifting member to the holding member A guide sheave and a second guide sheave that is always connected to the device under test and guides the guide wire that is lifted or dropped with the device under test are provided, and the lifting wire is attached to and detached from the connecting member attached to the device under test. A clamp member that can be connected and movable along the guide wire is provided, and the device under test dropped to the landing surface during a drop test of the device under test in which the connection between the clamp member and the connection member is released. The clamp member is lowered along the guide wire with respect to the body, and when the clamp member reaches a position where it can be connected to the connecting member, the connecting operation is performed. Drop test apparatus characterized by comprising in the.   The holding member is composed of an upper frame and a lower frame, and a connecting frame that connects these frames. A winding motor as the lifting member is placed on the upper base end side of the upper frame. The drop according to claim 1, wherein a tip of the lifting wire wound around a wire drum of a motor is coupled to the clamp member via the first guide sheave provided on the upper tip side of the upper frame. Test equipment.   The drop test apparatus according to claim 2, wherein the lifting wire wound around the wire drum is composed of two independent wires, and each is coupled to the clamp member.   The second guide sheave is provided on the lower tip side of the upper frame, the guide wire is guided to the second guide sheave, and the tip of the guide wire is a tubular member provided on the clamp member. The drop test apparatus according to claim 2, wherein the drop test apparatus is connected to the device under test through the guide member.   The second guide sheave is provided on both sides of the first guide sheave on the lower tip side of the upper frame, and the guide wire is wound around each second guide sheave. 5. A drop test apparatus according to claim 4, wherein the tip of the guide wire is connected to the device under test through a tubular guide member provided on both sides of the clamp member.   The clamp member is an electromagnetic clamp including a cylindrical main body and a clamp portion provided on the lower surface of the main body, and an arc-shaped coupling portion for coupling the lifting wire is provided on the upper surface of the main body. 2. The drop test device according to claim 1, wherein the clamp part is composed of a pair of semicircular arc-shaped clamping pieces whose front end side opens and closes around the rotation shaft at the base end by an electric signal.   A reed switch is provided at the lower end of the main body, and when the clamp member descends along the guide wire and reaches a position where the clamp member can be connected to the connecting member, the connecting operation is performed. The drop test device according to claim 6, wherein a magnet for outputting an instruction signal is provided on the guide wire.   The connecting member is composed of a pair of upper and lower connecting pieces each having a mounting surface for a test object, and a nylon sling attached to the upper connecting piece in a loop shape. The drop test device according to claim 1, which is detachably connected.   The nylon sling is made of synthetic resin and filled with a material with elasticity and shape retention function, such as Pyano wire and leaf spring, so that the nylon sling always keeps its eye in a circular shape. The drop test device according to claim 8.

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