JP2010137726A - Brake locking device for carrying truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake locking device in which a brake lock urging member is hardly dropped off even if impact is given to a carrying truck and in which a brake lock is hardly removed even when the brake lock urging member is dropped off and does not perform brake lock urging function, to provide a carrying truck strong to impact, and to provide a brake locking device reducing cost as compared with a conventional brake locking device. <P>SOLUTION: In the brake locking device 40 for the carrying truck, a brake lock means for locking a wheel is arranged on a middle part of the carrying truck. In the brake locking device used for the carrying truck, the brake lock means 42 is engaged with a gear coaxially fixed to the wheel arranged on the middle part by downwardly and vertically moving a brake lock pin downwardly movably urged at a lower side by own weight of the brake lock part or the own weight and urging force. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a brake lock device for a transport carriage in which two to four wheels are arranged on the bottom surface of a front end portion and a rear end portion of a chassis, respectively, and one or two intermediate wheels are arranged between them. is there.

Cargo carts used for the transportation or storage of goods in the distribution industry are required to go straight when used. On the other hand, a cart that is called a nesting state is moved to the storage location or moved from the storage location to the use location. If you do, turnability is required. As a means for solving this, a transporting carriage is known in which two to four wheels are arranged on the bottom surface of the front end portion and the rear end portion of the vehicle body, and one or two wheels are arranged between them. Here, the two-to-four wheels disposed at the four corners of the bottom surface of the front end portion and the rear end portion of the transport carriage and the intermediate wheel may all be casters. Here, the caster means a wheel that freely turns around an axis having a predetermined angle with respect to the wheel axis. This intermediate wheel can fix the turning motion in one direction in the longitudinal direction of the carriage.

  In the so-called nesting state in which empty carriages are gathered in a storage place, the intermediate wheel is more than two-to-four wheels arranged at the four corners of the bottom surface of the front and rear ends of the carriage. Is lifted upward, and when using the transport carriage, the intermediate wheel is pushed downward from two to four wheels arranged at the four corners of the front end and rear end of the bottom of the transport carriage. The structure is such that it can be projected and lowered so as to protrude downward. In this case, only the intermediate wheel has a diameter larger than the two-to-four omnidirectional wheels, and two-to-four omnidirectionally arranged at the four corners of the front end portion and the rear end portion of the bottom surface of the carriage. Even if the one and two intermediate wheels can be projected and retracted so as to protrude downward rather than the universal wheel, the same effect is obtained.

  By adopting such a configuration, at the time of the nesting, only two-to-four 360-degree swivel omnidirectional wheels arranged on the bottom surface of the front end portion and the rear end portion of the transport carriage are in contact with the floor. Turn freely. On the other hand, at the time of use in which goods are placed on a transport cart, all of the two wheels, four wheels, or the two-pair four wheels arranged at the four corners of the intermediate wheel and the bottom surface of the front end portion and the rear end portion of the transport cart. Straightness is ensured by the fixed intermediate wheel by contacting any one pair of two wheels with the floor surface. The diameter of the pair of two intermediate wheels is larger than the diameter of two pairs of four wheels arranged at the four corners of the bottom surface of the front and rear end portions of the carriage, so that the direction can be changed. One pair of two wheels in contact with the floor among the two pairs of four wheels arranged at the four corners of the bottom surface of the front and rear ends of the transporting carriage, with the pair of intermediate wheels having a large diameter as fulcrums. The direction can be easily changed by turning the wheels.

  However, in the above-mentioned transportation cart, when storing it in a store or warehouse, or when transporting a product to be delivered on a truck while being loaded on the transportation cart, the product loaded on the transportation cart It was necessary to install a brake lock device to protect it and ensure the safety of workers. The conventionally known brake lock device locks the rotation of the wheels disposed at the four corners of the bottom surface of the front and rear ends of the transport carriage. Since it cannot be locked until the direction turning operation, the transport carriage will turn when the floor surface is tilted even slightly, or when the brake lock is applied during transport of trucks, etc. There was a problem that the trolley fell. In such a case, the product cannot be protected or the safety of the worker cannot be ensured. In order to solve this problem, the invention proposed in Japanese Patent Application Laid-Open No. 2002-104195 discloses that the middle part of the bottom surface of the carriage is adjacent to the wheel fixed in the longitudinal direction and rotates together with the wheel. The pressing member is engaged with the tooth portion of the gear to lock the rotation of the wheel, and the tooth portion and the pressing member are engaged using their own weight or spring bias. However, when transporting by truck, transport carts may collide with each other. In addition, there may be a collision when transport carts at the time of nesting are arranged without being bulky at the storage location. In particular, in such a case, when the product is not transported, even if the transport cart collides, the product is not affected, so that the transport cart may be handled roughly. In such a case, the brake lock urging member may drop off due to an impact when the transportation carriage collides, or the brake lock device may break down, and the lock may be released.

JP 2002-104195 A

  The present invention was made paying attention to the above points, and the problem is that the brake lock urging member is not easily dropped even if an impact is given to the carriage, and the brake lock urging member is temporarily dropped. It is an object of the present invention to provide a brake lock device in which the brake lock is difficult to be disengaged even when the brake lock urging function is not fulfilled. Another object is to provide a transport cart that is resistant to impact. Another object is to provide a brake lock device that is less expensive than a conventional brake lock device.

  In order to solve the above-mentioned problems, the present invention arranges two-to-four omnidirectional wheels at the front end and rear end of the chassis, respectively, and arranges two-to-two wheels at an intermediate portion thereof for transportation. In the transport vehicle brake lock device in which a brake lock means for locking a wheel is disposed at the intermediate portion of the carriage, the brake lock means is attached to be movable downward and downward by the weight of the brake lock portion or the weight and the urging force. A brake lock device for use in a transport carriage characterized in that a biased brake lock pin is engaged vertically with a gear fixed coaxially with a wheel disposed in the intermediate portion by moving vertically downward. is there.

  In order to solve the above problems, the present invention is characterized in that the brake lock portion has a brake lock slider that can move vertically in the vertical direction, and a brake pin is fixed horizontally to the brake lock slider. It is a brake lock device used for a transport cart.

In order to solve the above-mentioned problems, the present invention is a brake lock device used in the above-described transportation carriage, characterized in that a groove case for restricting the moving direction of the brake lock slider vertically to the vertical direction is provided.

  According to the present invention, even if an impact is applied to the transport carriage, the brake lock urging member is difficult to drop off, and even if the urging member falls off, the force that pushes down the brake lock pin vertically due to the weight of the brake lock member, etc. Therefore, it is possible to provide a brake lock device that can lock a wheel even if the brake lock device breaks down. In addition, the brake lock pin can be moved vertically downward by the brake lock device by its own weight to lock it with the gear, so all the vertical components of the weight of the brake lock member should be used to lock the wheel. The brake lock pin is difficult to come off. Further, according to the present invention, since the brake lock pin and the brake lock slider are fixed, the weight of the brake lock member is increased and not only the above effect is ensured but also the vertical positioning can be ensured. Further, according to the present invention, since the groove case for restricting the moving direction of the brake lock slider to the vertical direction is provided, the positioning in the vertical direction can be ensured and the impact received by the transportation carriage can be resisted. Further, the cost can be suppressed without increasing the number of parts.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 is an overall view of a transport cart. FIG. 2 is a side view of the transport carriage, A is a side view of the front frame portion, and B is a side view of the rear frame portion. 3A is a front view of the brake lock device at the time of brake lock-off, and B is a view seen from the D direction in A. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3 of the brake lock device when the brake is locked off. FIG. 5A is an enlarged side view of the brake lock operating device when the brake lock is off. B is an enlarged side view of the brake lock means when the brake lock is off. FIG. 6A is a front view of the brake lock device when the brake lock is on, and B is a view seen from the D direction. 7 is a cross-sectional view taken along the line VII-VII in FIG. 6 of the brake lock device when the brake is locked. FIG. 8A is an enlarged side view of the brake lock operating device when the brake lock is on. B is an enlarged side view of the brake lock means when the brake lock is on.

  Wheels 30 and 30 are attached to the bottom surface of the front end portion 35 of the transport carriage 10 via rotating portions 38 and 38 that can rotate 360 degrees freely in all directions. In addition, wheels 32 and 32 are attached to the bottom surface of the rear end portion 37 through rotating portions 39 and 39 that rotate 360 degrees freely in all directions. Further, a pair of intermediate wheels 31, 31 capable of fixing the turning direction in only one direction in the longitudinal direction of the transport carriage are attached to the substantially intermediate bottom surface. All these wheels can be casters. The brake lock device 40 includes a brake lock operation unit 41 and a brake lock unit 42, and the brake lock operation unit 41 includes a brake lock operation device 50 and a brake lock operation transmission device 60. A front frame portion 21 is erected on the upper portion of the front end portion 35 of the transport carriage 10, and a rear frame portion 22 is also erected on the upper portion of the rear end portion 37. Although the pallet 99 is shown in FIG. 1, the pallet 99 is omitted from FIG. 3 for explanation. Further, the nameplate 23 can describe a delivery destination or a delivery date. The pallet stopper 24 can be fixed to the rear frame portion 22 when the pallet 99 is raised.

  The brake lock operating device 50 is substantially composed of a brake lock bracket 51, a brake lock pedal 52, a brake lock release pedal 53, a shaft 54, a shaft 55, a shaft 56, and a pin 57. The shaft 54, the shaft 55, the shaft 56, and the pin 57 are installed substantially perpendicular to the brake lock transmission shaft 62 (see FIGS. 3 and 4). The brake lock bracket 51 and the brake lock pedal 52 are pivotally supported by a shaft 55 so as to be able to swing. One of the shafts 54 is pivotally supported by the brake lock pedal 52, and the other is fixed to the brake lock transmission bracket 61. A coil spring S1 is wound around the shaft 55, one end of which is locked to the shaft 54, and the other end is locked to the brake lock bracket 51 to urge the brake lock pedal 52 in the direction of arrow A ( (See FIG. 4). A pin 57 is fixed to the brake lock pedal 52. When the brake lock pedal 52 is pushed downward, the pin 57 fixed to the brake lock pedal 56 is engaged with the concave groove 58 of the brake lock release pedal 53 so that the brake is applied. The locked state can be maintained (see FIG. 7). The brake lock operating device 50 is preferably provided at the front end portion 35 of the transport carriage 10. This is because the operator can easily perform the brake lock operation.

  The brake lock release pedal 53 is pivotally supported by the brake lock bracket 51 so as to be swingable by a shaft 56. Further, the torsion spring S2 is wound around the shaft 56, and one end thereof is locked to the brake lock bracket 51 and the other end is locked to the brake lock release pedal 53, thereby urging the brake lock pedal 52 in the direction of arrow A ( (See FIG. 4). The pin 57 locked in the groove 58 of the brake lock release pedal 53 can be released from the groove 58 when the brake lock release pedal 53 is pushed in the direction of arrow B, and the brake lock is released. Can do.

  The brake lock operation transmission device 60 is provided in the vehicle body 20 and is installed between the brake lock operation device 50 and the brake lock means 42. The brake lock operation transmission device 60 includes a brake lock transmission bracket 61, a brake lock transmission shaft 62, and a brake lock transmission bending portion 63. Since the brake lock transmission bracket 61 is fixed to the brake lock pedal 52 and the shaft 54 as described above, when the brake lock pedal 52 is pressed, the shaft 54 moves in the direction of arrow C, and the moved shaft 54 transmits the brake lock transmission. The bracket 61 is moved in the C direction. Since the brake lock transmission bracket 61 and the brake lock transmission shaft 62 are fixed, the brake lock transmission bracket 61 moved in the C direction moves the brake lock transmission shaft 62 in the C direction. Further, when the brake lock transmission shaft 62 moves in the C direction, the brake lock transmission bent portion 63 integral therewith moves in the C direction accordingly (see FIGS. 4 and 7).

  Next, the brake lock means 42 will be described. The brake lock means 42 includes gears 43, 43, wheel suspension parts 45, 45, a brake lock part 46, and a brake lock link part 47. The gears 43 and 43 are fixed coaxially with the intermediate wheels 31 and 31. Therefore, since the wheels 31 and 31 and the gears 43 and 43 are integrated and synchronize with each other, the rotation of the wheels 31 and 31 is stopped if the rotation of the gears 43 and 43 is stopped. In addition, it is also preferable that the intermediate | middle wheels 31 and 31 are the same diameter as the said wheels 30 and 30 and the wheels 32 and 32, or a diameter is large. The wheel suspensions 45, 45 are supported by intermediate wheels 31, 31 integrated with the gears 43, 43 and a shaft 48, and the intermediate wheels 44, 44 are connected to the wheel suspensions 45, 45 together with the gears 43, 43. It can be rotated. The wheel suspension portions 45, 45 are provided with groove portions 49, 49, and the brake lock pins 71, 71 slide in the groove portions 49, 49 as described later. The groove portions 49 and 49 can slide the brake lock pins 71 and 71 in the vertical direction (not shown). Therefore, the brake lock pins 71 and 71 can engage with the teeth 44 and 44 of the gears 43 and 43 vertically from above. It is also possible to fix the brake lock pins 71, 71 to the brake lock sliders 72, 72. It is also preferable that the brake lock pins 71 and 71 are fixed horizontally to the break lock sliders 72 and 72. It is also preferable that the brake lock sliders 72 and 72 are fitted inside the grooves 49 and 49 so as to be slidable in the vertical direction and in the vertical direction. It is also preferable to install the groove cases 70 and 70 so as to surround the groove portions 49 and 49. The groove cases 70 and 70 ensure that the vertical movements of the brake lock sliders 72 and 72 in the vertical vertical direction are not swayed in any direction other than the vertical vertical direction. In addition, the brake lock sliders 72 and 72 are less likely to come off from the grooves 49 and 49.

  The brake lock unit 46 includes brake lock pins 71 and 71, brake lock arms 73 and 73, a brake lock shaft 74, and a push rod 75. The brake lock shaft 74 is disposed substantially parallel to the width direction of the transport carriage 10 (direction substantially perpendicular to the brake lock transmission shaft 62, see FIG. 3), and brake lock arms 73 and 73 are arranged in the vicinity of the end in the width direction. It is fixed. The brake lock arms 73 and 73 can be fixed to the brake lock pins 71 and 71 (not shown). The push rod 75 is fixed to the brake lock shaft 74 and installed so as to protrude upward at a substantially middle point of the brake lock shaft 74. A part of the push rod 75 protruding upward slides in the hole 21 provided in the lower surface of the vehicle body 20. It is possible to install the push rod 75 so that the compression spring S3 is wound around the push rod 75. The push rod 75 is biased so as to push the entire brake lock portion 46 downward. Accordingly, the brake lock pins 71 and 71 are sufficiently engaged with the tooth portions 44 and 44 of the gears 43 and 43 even with the weight of the brake lock portion 46 alone, but the brake lock pin 71 is also applied by the urging force of the compression spring S3. , 71 can be urged to engage with the teeth 44, 44 of the gears 43, 43. It is also preferable that the brake lock sliders 72 and 72 to which the brake lock pins 71 and 71 are fixed and the brake lock arms 73 and 73 are fixed. This is because the weight of the brake lock portion 46 is increased, so that the brake lock pins 71 and 71 can be further urged so as to be surely engaged with the tooth portions 44 and 44 of the gears 43 and 43. In the above case, the brake lock sliders 72 and 72 and the compression spring S3 can be included in the brake lock portion 46.

  In the brake lock link portion 47, a locking member 81 is fixed at a substantially central portion of the link shaft 80. A hole 82 is provided below the locking member 81, and the link shaft 80 passes through the hole 82. The link shaft 80 and the locking member 81 are prevented from rotating. The locking member 81 is fixed so as not to rotate in the radial direction of the shaft when the link shaft 80 is used as a shaft. As a fixing method in this case, for example, a known method such as welding, adhesion, or a cross-sectional shape of a joint portion between the locking member 81 and the link shaft 80 has a polygonal shape. Further, the upper portion of the locking member 81 is in contact with the brake lock transmission bending portion 63.

  The both ends of the link shaft 80 are fixed to the link arms 83 and 83. That is, holes 84 and 84 are opened at one end of the link arms 83 and 83, the link shaft 80 penetrates through the holes 84 and 84, and the link shaft 80 and the holes 84 of the link arms 83 and 83, The joint with 84 is prevented from rotating, and the link arms 83 and 83 are fixed so as not to rotate around the axis of the link shaft 80 in the radial direction. As a fixing method in this case, for example, a known method such as welding, adhesion, or a cross-sectional shape of a joint portion between the link shaft 80 and the link arm 83 having a polygonal shape is used.

  Holes 85, 85 are also provided at the other ends of the link arms 83, 83. Brake lock arms 73 and 73 pass through the holes 85 and 85. Further, the brake lock arms 73 and 73 and the link arms 83 and 83 are not fixed, and the brake lock arms 83 and 83 are connected to the link arms 83 and 83 so as to be able to swing. The locking member 81 and the link arms 83 and 83 are arranged at an angle of approximately 80 degrees in a side view state with the link shaft 80 as a center (see FIG. 5B). This angle is appropriately determined depending on the sliding amount of the brake lock sliders 72 and 72 or the arrangement of the link shaft 80 and the brake lock shaft 74.

  Operation | movement of the brake lock apparatus 40 used for the trolley | bogie 10 of the present invention comprised in this way is demonstrated. As described above, the push rod 75 is urged vertically downward by the weight of the brake lock 46 or the weight and the compression spring S3. Further, the urging force pushes down the brake lock arms 73 and 73 vertically via the brake lock shaft 74, and the brake lock pins 71 fixed to the brake lock sliders 72 and 72 fixed to the brake lock arms 73 and 73. , 71 move vertically downward to the teeth 44, 44 of the gears 43, 43 and engage with the teeth 44, 44. Further, the brake lock sliders 72 and 72 and the brake lock pins 71 and 71 can also be pushed down vertically and engaged with the tooth portions 44 and 44 of the gears 43 and 43 due to their own weights.

  As described above, the brake lock arms 73 and 73 slidably coupled to the link arms 83 and 83 are connected to the brake lock sliders 72 and 72 by the own weight of the brake lock portion 46 or the urging force of the own weight and the compression spring S3. The connecting portion of the link arms 83, 83 is pushed downward about the link shaft 80. Accordingly, the upper portion of the locking member 81 is urged in the direction of arrow C (see FIG. 4). Therefore, if the locking member 81 is not locked to the brake lock transmission bent portion 63, the locking member 81 is always urged in the direction of the arrow C, so that the intermediate wheels 31, 31 are You will be locked.

  In the state where the brake lock pedal 52 is being pressed (the state where the brake lock is ON) in the brake lock operating device 50 under the above state (see FIG. 7), the brake lock transmission bending portion 63 follows the C direction accordingly. Move to. Accordingly, the locking member 81 allows the locking member 81 to move in the direction of arrow C due to the weight of the brake lock portion 46 or the urging force of the weight and the compression spring S3. Accordingly, as described above, the brake lock pins 71 and 71 are engaged with the tooth portions 44 and 44 of the gears 43 and 43, and the intermediate wheels 31 and 31 are locked.

  On the other hand, when the brake lock release pedal 53 is pressed, the pin 57 is removed from the groove 58, and the brake lock pedal 52 rotates about the shaft 55 in the direction of arrow A by the biasing force of the coil spring S1 (see FIGS. 7 and 4). ). Accordingly, the shaft 54 moves in the direction opposite to the arrow C direction, the brake lock transmission bracket 61 fixed to the shaft 54 also moves in the direction opposite to the arrow C direction, and the brake lock integrated with the brake lock transmission bracket 61 is integrated. The transmission shaft 62 also moves in the direction opposite to the arrow C direction. Accordingly, since the brake lock transmission bent portion 63 integral with the brake lock transmission shaft 62 moves in the direction opposite to the C direction, the upper portion of the locking member 81 locked to the brake lock transmission bent portion 63 is also opposite to the C direction. Move in the direction.

  Here, as described above, the upper portion of the locking member 81 also moves in the direction opposite to the C direction. Since the locking member 81 fixed to the link shaft 80 and the link arms 83 and 83 can be fixed at an angle of approximately 80 degrees in a side view, the upper portion of the locking member 81 is also opposite to the C direction. According to the moving movement, the connecting portion of the link arms 84, 84 and the brake lock arms 73, 73 around the link shaft 80 moves upward against the own weight of the brake lock portion 46 or the own weight and the urging force of the compression spring S3. Pulled up. As a result, the brake lock sliders 72 and 72 fixed to the brake lock arms 73 and 73 are also lifted, so that the brake lock pins 71 and 71 are disengaged from the teeth 43 and 43 of the gears 44 and 44, and the brake lock is released. Canceled.

  As described above, the brake lock pins 71 and 71 are always urged to be engaged with the teeth 43 and 43 of the gears 44 and 44 by the own weight of the brake lock portion 46 or the urging force of the own weight and the compression spring S3. Yes. Therefore, even if the brake lock operation device 50 or the brake lock operation transmission device 60 is broken due to an impact received on the transport carriage 10 and the brake lock operation device 50 cannot be operated, the intermediate wheel 31 of the transport cart 10 is not provided. 31 is fixed, the turning or movement is prevented, the goods placed on the carriage 10 are protected, and the safety of the operator is ensured.

Further, since the brake lock pins 71, 71 are pressed vertically downward by the own weight of the brake lock portion 46 or the own weight and the urging force of the compression spring S3, all of the force is generated by the tooth portions 44, 43 in the gears 43, 43. It works perpendicularly to 44 and does not work in the direction of escaping from the teeth 44, 44. Therefore, with a certain degree of impact, the pins 71 and 71 are less likely to be disengaged from the tooth portions 44 and 44, which can contribute to safety.

It is a general view of a transportation cart. It is a side view of a trolley | bogie for conveyance, A is a side view of a front frame part, B is a side view of a rear frame part. A is a front view of the brake lock device at the time of brake lock-off, and B is a view seen from the D direction. It is the IV-IV sectional view taken on the line in FIG. 3 about the brake lock apparatus at the time of brake lock-off. A is an enlarged side view of the brake lock operating device when the brake is locked off. B is an enlarged side view of the brake lock means when the brake lock is off. A is a front view of the brake lock device at the time of brake lock on, and B is a view seen from the D direction. It is the VII-VII sectional view taken on the line in FIG. 6 about the brake lock apparatus at the time of brake lock on. A is an enlarged side view of the brake lock operating device when the brake lock is on. B is an enlarged side view of the brake lock means when the brake lock is on.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Carriage 20 Car body 30, 30 Front end wheel 31, 31 Intermediate wheel 32, 32 Rear end wheel 40 Brake lock device 41 Brake lock operation means 42 Brake lock means 46 Brake lock part 47 Brake lock link part 50 Brake lock operation Device 60 Brake lock operation transmission device

Claims (3)

Two-to-four omnidirectional wheels are arranged at the front end and rear end of the chassis, respectively, a pair of two-wheel wheels are arranged in the middle, and a brake that locks the wheels in the middle of the carriage In the brake lock device for a transport cart provided with the lock means, the brake lock means is configured such that a brake lock pin urged so as to be moved downward and downward by its own weight or its own weight and urging force is perpendicular to the downward direction. A brake lock device used for a carriage for transportation, wherein the brake lock device is engaged with a gear fixed coaxially with a wheel disposed at the intermediate portion by moving. The brake lock used in the transport carriage according to claim 1, wherein the brake lock portion has a brake lock slider that can move vertically in a vertical direction, and a brake pin is fixed horizontally to the brake lock slider. apparatus. 3. A brake lock device for use in a transport carriage according to claim 2, further comprising a groove case for vertically restricting the moving direction of the brake lock slider in the vertical direction.

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