JP2010237027A - Drop testing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve test efficiency by not only realizing the smooth dropping state of a test object when a drop test is repeatedly and continuously performed but also simply performing the hanging-up work of the test object in a short time. <P>SOLUTION: This drop testing equipment 1 is constituted of a base plate 3 equipped with a landing surface 2, the base frame 4 provided on the base plate 3 in an erected state and the holding member 11 provided to the upper part of the base frame 4. A first guide sieve 6 guiding the hanging-up wire 5 hung up by a take-up motor 14 and an upper side guide sieve 9 guiding the upper side guide wire 8, which is always connected to the upper part of a vehicle 7 at its leading end and hung up or dropped along with the vehicle 7, are provided to the holding member 11 while a lower side guide sieve 22, which guides the lower side guide wire 17 always connected to the lower part of the vehicle 7 at its leading end and hung up or dropped along with the vehicle 7, is provided to the base plate 3 to connect the base end of the upper side guide wire 8 and the base end of the lower side guide wire 17. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

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

  Examples of this type of drop test apparatus include various structures. For example, as an endurance test apparatus for a motorcycle, the one shown 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. An adjustable vehicle body lifting and dropping means for dropping 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 are provided.

  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 This makes it possible to simulate the actual starting method by starting the engine and starting the engine suddenly, and the endurance test can be performed by automatically 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.

  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 a vehicle such as the above-described motorcycle or automobile. Applicable to drop impact test equipment.

  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. Can be reduced.

Japanese Laid-Open Patent Publication No. 3-21440 (see Claims, FIG. 1) JP-A-3-21440 (see paragraph 0038, FIGS. 1, 3, and 4 in the specification)

  However, in the above test apparatus, 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 to lift 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.

  The present invention was devised in view of the above-described circumstances, and the object of the invention is not only to realize a smooth fall state of the DUT when repeatedly performing the drop test continuously. It is an object of the present invention to provide a drop test apparatus that can be easily lifted in a short time, has high test efficiency, and is optimal for expecting an improvement in its versatility.

  In order to achieve the above-described object, the configuration of the drop test apparatus according to the present invention is basically provided on a base with a landing surface, a base frame standing from the base, and an upper part of the base frame. A first guide sheave that guides a lifting wire that is lifted by the lifting member, and an upper end that is always connected to the upper portion of the device under test and is lifted or dropped together with the device under test. A second guide sheave for guiding a guide wire, and a lower guide sheave for guiding the lower guide wire that is always connected to the lower portion of the device under test and is lifted or dropped together with the device under test. And connecting the base end of the upper guide wire and the base end of the lower guide wire to the lifting wire so as to be detachably connected to the connecting member attached to the device under test. Both are provided with a clamp member that can move along the upper guide wire, and the test object that has fallen on the landing surface during the drop test of the test object that has been released from the connection between the clamp member and the connection member. Assume that when the clamp member is lowered along the upper guide wire and the clamp member reaches a position where it can be connected to the connecting member, the connecting operation is performed.

  Therefore, according to the present invention, when the clamp member is lowered along the upper guide wire with respect to the vehicle that has fallen on the ground 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 the drop test is repeatedly performed continuously, the preparation work for lifting as shown in the conventional example can be performed in a short time.

In particular, the base end of the upper guide wire that is always connected to the upper part of the device under test is connected to the base end of the lower guide wire that is always connected to the lower part of the device under test. Therefore, the upper and lower guide wires do not become resistance when the device under test is dropped, and a smooth falling state can be realized. Therefore, if the drop test device of the present invention is used, the device under test is used. In addition to realizing a smooth drop state, it is possible to perform a drop test with good test efficiency by shortening the preparation time for lifting the DUT.

1 is a partially broken front view of a drop durability test apparatus showing the best embodiment of the present 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.

  In the following, the present invention will be described based on the illustrated embodiment. However, the drop test apparatus of the present invention is embodied as a drop durability test apparatus for performing a drop durability test of a vehicle such as an automobile. .

  As shown in FIGS. 1, 2 and 3, the drop durability test apparatus 1 according to this embodiment includes a base 3 provided with a landing surface 2, a base frame erected from the base 3, and the base frame The holding member is provided on the upper part, and the holding member is connected to the first guide sheave 6 for guiding the lifting wire 5 lifted by the lifting member, and the tip is always connected to the vehicle 7 as a test object. And an upper guide sheave 9 for guiding the upper guide wire 9 that is lifted or dropped, and the base 3 is always connected to the lower portion of the vehicle 7 to guide the lower guide wire that is lifted or dropped together with the vehicle 7. A lower guide sheave 22 is provided to connect the base end of the upper guide wire and the base end of the lower guide wire, while the lifting wire 5 is attached to and detached from the connecting member 10 attached to the vehicle 7. And a clamp member 12 that is movable along the upper guide wire and is provided on the landing surface 2 during a drop test of the vehicle 7 in which the connection between the clamp member 12 and the connection member 10 is released. When the clamp member 12 is lowered along the upper guide wire with respect to the vehicle 7 and the clamp member 12 reaches a position where it can be connected to the connecting member 10, the connecting operation is performed.

  In more detail below, the above-mentioned base frame is composed of four support columns (only two are shown in FIG. 1) 4 standing from the base 3, and the above-mentioned holding frame is held on the upper inner side of this base frame. A 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 these frames 11a and 11b, and the above-mentioned lifting member is provided at the upper base end (referring to the left side in FIG. 1) of the upper frame 11a. The winding motor 14 is mounted.

  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 includes two independent wires as shown in FIG. 5 and is connected to the clamp member 12 via a first guide sheave 6 provided at the upper end of the upper frame 11a (referred to as the right side in FIG. 1).

  As shown in FIGS. 2, 3, 4 and 5, the clamp member 12 is an electromagnetic clamp including a cylindrical main body 12a and a clamp portion 12b provided on the lower surface of the main body 12a. An arcuate coupling portion 13 for coupling the lifting wire 5 is provided on the upper surface of 12a.

  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 and is connected or released from each other.

  An upper guide sheave 9 is provided at the lower end of the upper frame 11a, and an upper messenger wire 8 serving as the upper guide wire is guided to the upper guide sheave 9.

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

  Further, the two upper messenger wires 8 are arranged so as to be movable up and down along the support column 4 through a wire tensioning device to be described later, and the leading ends thereof are on both sides of the upper guide sheave 9 and the main body 12a of the electromagnetic clamp. Are connected to the vehicle 7 through the two sets of tubular guide members 12d.

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

  In addition, when a magnet 21 is attached near the tip of one of the two upper messenger wires 8 and faces the reed switch 12e provided on the lower surface of the main body 12a of the electromagnetic clamp, In addition, a close signal for instructing to close the pair of clamping pieces 16 of the electromagnetic clamp is output.

  And the attachment position with respect to the messenger wire 8 of said magnet 21 is a position which opposes reed switch 12e, when the clamping piece 16 of an electromagnetic clamp opposes the eye 18a of said nylon sling 18 only.

  As shown in FIG. 1, the base 3 is provided with a guide hole 36 for allowing the lower messenger wire 17 as the lower guide wire to pass therethrough, one end of which is close to the support column 4. And the other end communicates with the through hole 2a drilled in the landing surface 2 described above.

  The guide hole 36 is provided with the two lower guide sheaves 22 for guiding the lower messenger wire 17 whose tip is connected to the vehicle 7 upward along the support column 4. The base end of the side messenger wire 17 is connected to the base end of the upper messenger wire 8 (not shown), and the upper and lower messenger wires 8 and 17 are so-called one endless wire.

  The lower messenger wire 17 is formed of a material that is thinner and lighter than the lifting wire 5 in the same manner as the upper messenger wire 8.

  Note that the connection structure of the tip of the lower messenger wire 17 to the vehicle 7 and the connection structure of the base end of the lower messenger wire 17 and the base end of the upper messenger wire 8 are not shown in this embodiment. Any method can be employed. For example, as the connection structure of the lower messenger wire 17 to the vehicle, the structure of the connector 20 used at the distal end of the upper messenger wire 8 shown in FIG. 3 can be employed. .

  As shown in FIG. 1 and FIG. 6, a wire tensioning 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 11 c, and a control device (not shown). The cylinders are expanded and contracted in accordance with the instructions of the above, and the upper and lower messenger wires 8 and 17 are tensioned (shown by the solid-line device-side sheave 26 in FIG. 6) or relaxed (dotted line vehicle 7 in FIG. 1 and 2 in FIG. 6). A device side sheave 26 is shown).

  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, extending from the electromagnetic clamp. The power feeding cable 29 is arranged as a cabel bear downward through the fourth and fifth guide sheaves 28, 29, so that it can move up and down.

  As shown in FIG. 1 and FIG. 5, guide wires 31 extending in the vertical direction are provided on the inner side of each of the support columns 4, and the proximal ends of these guide wires 31 are fixed to electromagnetic clamps. The distal end of the connecting wire 32 is connected so as to be movable along the guide wire 31.

  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 FIG. 2 and FIG. 3, the connecting member 10 attached to the vehicle 7 side is arrange | positioned along with said connection tool 20, and it is a pair of upper and lower sides provided with the semicircular arc shaped attachment surface inside The connecting piece 10a, 10b and a 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 to the vehicle 7 by bolting (not shown).

  The nylon sling 18 is made of a synthetic resin and filled with a material having elasticity and shape retaining 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, a pair of connectors 20 provided at the tip of the upper messenger wire 8 on the vehicle mounting portion 34 that is an upper portion of the vehicle 7 that performs the drop durability test. The connecting member 10 is mounted side by side, and the tip of the lower messenger wire 17 is connected to the lower portion of the vehicle 7.

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

  When the electromagnetic clamp is lowered and the reed switch 12e provided on the lower surface of the main body 12a is opposed to the magnet 21 provided on the upper messenger wire 8, a close signal is output, and a pair of electromagnetic clamps that have been opened in advance. The clamping piece 16 is closed.

  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 upper 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.

  Further, since the upper messenger wire 8 and the lower messenger wire 17 are made of a material that is thinner and lighter than the lifting wire 5, both the messenger wires 8 and 17 are smooth when the vehicle 7 is lifted upward. And the load on the winding motor 14 is reduced, and this lifting operation is not hindered.

  Then, 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, so that the vehicle 7 starts to fall freely.

  When the vehicle 7 falls on the landing surface 2, it falls while pulling the upper messenger wire 8 attached to the vehicle 7, and the upper messenger wire 8 is connected to the base end of the lower messenger wire 17. Since the upper and lower messenger wires 8 and 17 are so-called one endless wire, the messenger wires 8 and 17 do not become resistance when the vehicle 7 is dropped, and a smooth fall state can be realized.

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

  When the lifting wire 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 upper messenger wire 8, a closing signal is output and the electromagnetic clamp The pair of clamping pieces 16 are closed.

  Then, since the tip 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, the vehicle 7 is connected to the mutual connection, that is, the lifting wire 5. .

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

  As described above in detail, according to the drop durability test apparatus 1 of the present invention, the clamp member 12 is lowered along the upper messenger wire 8 with respect to the vehicle 7 that has fallen 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 upper messenger wire 8, a close signal is output and the pair of clamping pieces 16 of the electromagnetic clamp are closed. 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.

  Further, since the base end of the upper messenger wire 8 is connected to the base end of the lower messenger wire 17 and these upper and lower messenger wires 8 and 17 become a so-called single endless wire, these upper and lower messenger wires. The wires 8 and 17 do not become resistance when the vehicle 7 falls, and a smooth fall state can be realized.

  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 placed.

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

  In addition, since two upper messenger wires 8 are used and the electromagnetic clamp moves along the upper messenger wires 8 between them, the electromagnetic clamp can be rotated or shifted to one upper messenger wire 8 side. The clamp portion 12b can be reliably and repeatedly disposed at a position facing the eye 18a of the nylon sling 18 without any trouble.

  Further, since the upper messenger wire 8 and the lower messenger wire 17 are made of a material that is thinner and lighter than the lifting wire 5, for example, when the vehicle 7 is lifted upward, even if it is always connected to the vehicle 7. Both messenger wires 8 and 17 move smoothly, so that the load on the winding motor 14 can be reduced and this lifting operation is not hindered.

  In addition, since the nylon sling 18 is used and the inside thereof is filled with a material having elasticity and a shape maintaining function such as a Piano wire or a leaf spring, the nylon sling 18 can always maintain the eye 18a in a circular shape. Therefore, the clamping piece 16 constituting the clamp portion 12b of the electromagnetic clamp can be reliably inserted into the eye 18a, and the drop durability test can be automatically and repeatedly performed with peace of mind.

  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 upper 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. Alternatively, other sensors or the like may be used.

  In the present embodiment, the clamp member 12 is also an electromagnetic clamp. However, a clamp using another hydraulic pressure or a clamp using another mechanical structure may be employed.

  It is suitable for the realization of a drop durability test device that performs a drop durability test of vehicles such as automobiles.

DESCRIPTION OF SYMBOLS 1 Drop endurance test apparatus 2 Landing ground 3 Base 4 Base post 5 Lifting wire 6 First guide sheave 7 Vehicle as test object 8 Upper messenger wire 9 upper guide wire 9 Upper guide sheave 10 Connecting member 10a Upper connecting piece 10b Lower connection piece 11a Upper frame as a holding member 11b Lower frame as a holding member 11c Connection frame as a holding member 12a Main body as a clamping member 12b Clamping portion as a clamping member 12c Rotating shaft 12d Guide member 12e Reed switch
DESCRIPTION OF SYMBOLS 13 Connector 14 Winding motor which is lifting member 16 Clamping piece 17 Lower messenger wire which is lower side guide wire 18 Nylon sling 18a Eye 21 Magnet 22 Lower side guide sheave

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 an upper guide sheave whose tip is always connected to the upper part of the DUT and guides the upper guide wire that is lifted or dropped together with the DUT are provided, and the tip always has a lower end of the DUT. The lower guide sheave that guides the lower guide wire that is lifted or dropped together with the DUT is connected to the base end of the upper guide wire and the base end of the lower guide wire. The lifting wire is provided with a clamp member that is detachably connected to a connecting member attached to the DUT and is movable along the upper guide wire. At the time of a drop test of the DUT released from the connection with the connecting member, the clamp member is lowered along the upper guide wire with respect to the DUT falling on the landing surface, and the clamp member is connected to the connecting member. A drop test apparatus characterized in that when a connectable position is reached, a connecting operation is performed.   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 tip of the said lifting wire wound by the wire drum of the take-off motor is couple | bonded with said clamp member through said 1st guide sheave provided in the upper front end side of the upper frame. Drop test device.   The drop test device 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 upper guide sheave is provided on the lower tip side of the upper frame, and the upper guide wire is guided to the upper guide sheave. The tip of the upper guide wire is formed in a tubular shape provided on the clamp member. The drop test apparatus according to claim 2, wherein the drop test apparatus is connected to a device under test through the guide member.   The upper guide sheaves are provided on both sides of the first guide sheave on the lower end side of the upper frame, and the upper guide wires are wound around the upper guide sheaves. 5. The drop test apparatus according to claim 4, wherein the tip of the wire passes through a tubular guide member provided on both sides of the clamp member and is connected to the device under test.   The clamp member is an electromagnetic clamp provided with a cylindrical main body and a clamp portion provided on the lower surface of the main body, and an upper surface of the main body is provided with an arc-shaped coupling portion for coupling the lifting wire, The drop test device according to claim 1, wherein the clamp portion is configured by a pair of semi-circular 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. When the clamp member descends along the upper 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 apparatus according to claim 6, wherein a magnet for outputting a signal instructing to perform is provided on the upper guide wire.   The connecting member is composed of a pair of upper and lower connecting pieces each provided with a mounting surface for a test object, and a nylon sling attached to the upper connecting piece in a loop shape, and the clamp part is provided in the eye of the nylon sling. The drop test apparatus according to claim 1, which is detachably connected.   The above nylon sling is made of synthetic resin and filled with a material with elasticity and shape retention function such as Piano wire and leaf spring, so that the nylon sling always keeps its eye in a circular shape The drop test apparatus according to claim 8 formed.

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