JP5275005B2 - Carriage for transportation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts, to also reduce a manufacturing cost of a carrying truck, and to enhance rigidity of a frame part without increasing the number of parts. <P>SOLUTION: The carrying truck has a constitution that it comprises a turning plate having one end fixed to a pallet 90 and the other end turnably connected to a connection part of a rear frame part; and an article which is turnably mounted by inserting a pivot shaft fixed to the turning plate to an inner side of a cylindrical part positioned at one end part of a connection body and in which the shaft fixed to the cylindrical part is turnably inserted to an inner side of the cylindrical part at the other end of the connection body. The cylindrical part is pulling up by the constitution according to motion for upwardly turning the pallet 90 at nesting, and the cylindrical part is pulled down by the constitution according to motion for downwardly turning the pallet 90 at use. Thereby, an intermediate wheel 56 can be vertically moved according to the motion for upwardly or downwardly moving the pallet 90. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to the transportation carriage having two to four wheels on the bottom surface of the front end portion and the rear end portion of the transportation carriage and one or two intermediate wheels in the middle thereof. .

  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 having two to four wheels on the bottom surface of the front end portion and the rear end portion of the vehicle body and one or two wheels in the middle is well known.

  Here, two-to-four wheels disposed on the bottom surface of the front end portion and the rear end portion of the transport carriage at the time of so-called nesting, in which empty transport carts are stacked in a storage place and gathered together without gaps. The intermediate wheel is lifted upward, and when the transport carriage is used, the intermediate wheel is more than two to four wheels arranged at the front end portion and the rear end portion of the bottom surface of the transport cart. It is configured such that it can be pushed down and protruded so as to protrude downward. In this case, only the intermediate wheel has a larger diameter than the omnidirectional wheel, and the intermediate wheel is more than the omnidirectional wheel disposed at the front end portion and the rear end portion of the bottom surface of the transport carriage by the same configuration. The same effect can be obtained even if it can appear and protrude so as to protrude downward.

  By adopting such a configuration, at the time of 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. That is, in order to make the transport cart turn freely, the intermediate wheel is lifted upward, the two to four wheels are in contact with the floor surface, and the two to four wheels that are in contact with each other are turned. Easy to change direction. On the other hand, when the product is placed on the transport carriage, the pair of two intermediate wheels and the two-to-four wheels arranged on the bottom surface of the front end portion and the rear end portion of the bottom surface of the transport cart are the floor. Straightness is secured by contacting the surface and fixing the direction in one direction without turning the intermediate wheel. When only the pair of two intermediate wheels have a diameter larger than that of the two to four omnidirectional wheels, the pair of two intermediate wheels can be used as fulcrums to make two of the four wheels. The direction can be changed by grounding and turning any one of the two wheels.

In the transporting carriage, for example, according to the invention described in Japanese Patent No. 4131525, a front end member arranged in parallel with a predetermined interval, and a through hole in which a support column portion of a caster base is loosely fitted on the upper surface of the central portion A rear end member having a hole-like lid shape having a bottom, a cart frame having a nesting structure composed of a connecting member that integrally connects the both end members, and a shelf frame attached to the rear end member; A caster base that has the column portion that passes through the through-hole and extends upward in the center, and that fits on the back side of the member at the rear end portion so as to be vertically movable with the member at the rear end portion, and the column portion A pair of left and right support rods that are pivotally supported or fixed to a pivotal support at the tip of the front end, a pair of universal casters attached to the bottom surface near both corners of the caster base, and both corners of the member at the front end A pair of free attached to the bottom of the side A caster, a fixed caster attached to the bottom surface of a substantially intermediate portion of the connecting member, a brake means for locking the rotation of a wheel of the fixed caster, and operating the brake means in a wheel locking direction and an unlocking direction of the fixed caster. A brake operating means, two support couplings, two pivot connecting plates pivotally supported by shaft projections or pivot projection support portions attached to the shelf frame, and a rectangular base In a stock cart comprising a base plate having a plate body, the rotation connecting plate comprises a support bar pivot portion located at the tip, a shaft-like projection pivot portion or a shaft-like projection, and a base plate locking portion. The shaft-shaped protrusion pivot portion or the shaft-shaped protrusion is located obliquely below the support bar pivot portion in a state in which the base plate is tilted, and by rotating the base plate upward, the shaft-shaped protrusion or Axis protrusion pivot As a point, the surface formed by the lower end of the fixed caster is lowered by pushing down the caster base integrally connected with the support bar by pushing the support bar pivot part downward with respect to the cart frame. A stock cart that is lifted above a surface formed by a lower end and nesting is performed by operation of a four-wheeled free caster. Such a transport cart called a stock cart raises the intermediate wheel upward, and interferes with the 360-degree turning operation of two to four wheels on the bottom surfaces of the front end portion and the rear end portion of the transport cart . Nesting operation can be performed without any problem. However, there is a problem in that the transportation cart has a complicated structure, has a large number of parts, and may frequently fail, and has a large manufacturing cost due to the large number of parts. Further, such a transportation cart is often subjected to impact such as a collision, and is required to have durability of the frame portion without increasing the number of parts.

Japanese Patent No. 4131525

  The present invention has been made paying attention to the above-mentioned points, and an object thereof is to simplify the nesting structure of the transportation carriage as much as possible and reduce the number of parts that cause failure. Another problem is to reduce the manufacturing cost of the transporting carriage by reducing the number of parts as described above. Further, it is to increase the rigidity of the frame without increasing the number of parts.

In order to solve the above-mentioned problems, the present invention is arranged such that two-to-four omnidirectional wheels are arranged at the front end portion and the rear end portion of the carriage , respectively, and a pair of two-wheel intermediate wheels are arranged at the middle portion thereof. The intermediate wheel of the pair of two wheels is lifted upward from the two-to-four omnidirectional wheels arranged at the front end portion and the rear end portion according to the movement of rotating the pallet upward during nesting. in accordance with the motion of rotating the pallet downward, connecting the intermediate wheel, in the transport carriage having the structure depressing downward, one end and the other end is fixed to the pallet to be rotatable in the connecting portion of the rear frame portion The pivot plate fixed to the pivot plate and the pivot shaft fixed to the pivot plate are inserted into the inside of the cylindrical portion located at one end of the coupling body, and the other end of the coupling body is mounted. On the inside of the cylindrical part, It has a configuration in which a constant is a shaft consists of those inserted rotatably, wherein the tubular portion is fitted on the outside of the strut receiving portion are erected on the rear end portion, to raise the shaft Thus, when the nesting is performed, the cylindrical portion is pulled up according to the movement of rotating the pallet upward, and when used, the cylindrical portion is pulled down by the configuration according to the movement of rotating the pallet downward. The intermediate wheel can be moved up and down by moving the cylindrical portion up and down with respect to the column receiving portion according to the movement of rotating the pallet upward or downward. .

  In order to solve the above problems, the present invention includes a rotating plate having one end fixed to a pallet and the other end rotatably connected to a connecting portion of a rear frame portion, and a pivot fixed to the rotating plate. A shaft fixed to the cylindrical part is attached to the inner side of the cylindrical part at the other end of the connecting body and is rotatably attached by being inserted inside the cylindrical part located at one end part of the connecting body. The transport carriage as described above, wherein the structure composed of the pivotally inserted members is arranged on both sides of the support column.

  In order to solve the above problems, the present invention provides a front frame portion and a rear frame portion with a lower portion for restricting the nesting direction, and the lower portion is erected at the front end portion and the rear end portion, The transportation carriage described above, wherein the transportation carriage is integrated with the rear frame portion.

  By adopting the above-described configuration, the nesting structure of the transportation carriage in the present invention can be simplified as much as possible, and the number of parts that cause failure can be reduced. By reducing the number of parts as described above, it was possible to reduce the manufacturing cost of the transportation cart. Further, since the rigidity of the frame portion can be increased and the number of parts does not increase, the durability due to impact can be improved without increasing the cost.

  Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 is an overall front view of the transport carriage. 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. FIG. 3 is an enlarged view of a mechanism for pulling up the pallet. FIG. 4 is a side view of the pallet placed on the frame. FIG. 5 is a side view in the middle of rotating upward of the pallet. FIG. 6 is a side view of the pallet rotated upward. FIG. 7 is a state diagram at the time of nesting, in which A is a state diagram of the carriage group provided with the lower part, and B is a state diagram of the carriage group provided with the lower part. FIG. 8 is a state diagram at the time of nesting, in which A is a cart group that does not have a lower portion, and is a state diagram at the time of nesting that is different from the cart group that has a lower portion, and B is a cart that has a lower portion. It is a state figure at the time of nesting in a group.

The transport carriage 10 is substantially composed of a front frame part 20, a rear frame part 30, a brake lock device 40, a front end part 50, an intermediate part 55, a rear end part 60, a connecting part 76, a chassis 80, and a pallet 90. Wheels 54, 54 are attached to the bottom surface of the front end portion 50 via rotating portions 53, 53 that can rotate 360 degrees freely in all directions. In addition, cushions 51, 51 are attached to the front surface of the front end 50 to absorb impact. Similarly, cushions 61 and 61 are attached to the rear surface of the rear end portion 60 in order to absorb an impact. In addition, wheels 64 and 64 are attached to the bottom surface of the rear end portion 60 via rotating portions 63 and 63 that rotate 360 degrees freely in all directions. That is, the two-to-four wheels 54, 54, 64, 64 and intermediate wheels 56, 56 described later may be casters on the bottom surfaces of the front end portion 50 and the rear end portion 60 of the transport carriage 10. it can. Here, the caster means a wheel that freely turns around an axis having a predetermined angle with respect to the wheel axis. However, a pair of intermediate wheels 56 and 56 capable of fixing the turning direction in only one direction in the longitudinal direction of the transport carriage can be attached to the bottom surface of the intermediate portion 55. The brake device 40 can lock the rotation of the intermediate wheel, and includes a brake operation means 41 and a brake means 42. 1 is the front direction, and the direction is the longitudinal direction (see FIG. 1).

The front frame portion 20 is one having a substantially ladder shape composed of the main shaft 21 and the first outer frame 22 and the second outer frame 23 and a plurality of transverse箋部25. The upper part of the first outer frame 22 extends substantially vertically upward, and the lower part is bent substantially horizontally. A portion of the first outer frame 22 that is bent in the horizontal direction is fixed to the main shaft 21, and a tip portion thereof is fixed to the second outer frame 23. A plurality of horizontal note portions 25 are fixed to the vertical portion of the first outer frame 22. The second outer frame 23 extends substantially vertically upward, the upper portion thereof is fixed to the plurality of horizontal writing portions 25, and the lower portion 24 of the second outer frame 23 is erected at the end portion of the front end portion 50. Here, the lower part 24 restricts the nesting direction. The main shaft 21 is fixed to the horizontal portion and the horizontal note portion 25 of the first outer frame 22. Further, the main shaft 21 is fitted inside a support column 52 erected substantially vertically upward from the central portion of the front end portion 50 and is fixed by a bolt 28. Since it has such a configuration, the lower part 24 is integral with the second outer frame 23, and the lower part 24 supports the front frame part 20 together with the main shaft 21, so that compared with a case where there is one main shaft. Thus, the strength and durability of the transport carriage 10 are increased. Further, the plate 26 can be fixed by the one horizontal note portion 25 and the horizontal note portion 27, and is preferably used as a so-called name plate which describes the delivery date of the cart.

The rear frame portion 30 has a substantially ladder shape including a support column 31 , a first outer frame 32, a second outer frame 33, and a plurality of horizontal note portions 35. The upper part of the first outer frame 32 extends substantially vertically upward, and the lower part is bent substantially horizontally. Further, the portion of the first outer frame 32 that is bent in the horizontal direction is fixed to the support column 31 , and the tip end portion is fixed to the second outer frame 33. A plurality of horizontal note portions 35 are fixed to the vertical portion of the first outer frame 32. The second outer frame 33 extends vertically upward, and the upper portion thereof is fixed to the plurality of horizontal writing portions 35, and the lower portion 34 of the second outer frame 33 is erected at the end portion of the rear end portion 60. The lower part 34 limits the nesting direction. The support column 31 is fixed to the horizontal portion of the first outer frame 32 and the horizontal note portion 35 . Further, the support column 31 is fitted inside a support column receiving portion 62 erected substantially vertically upward from the central portion of the rear end portion 60 and is fixed by a bolt 38. Because having such a configuration, bottom 34 is integral with the second outer frame 33, since the lower 34 and supports the rear frame portion 30 together with the upper Symbol column 31, when the post is one In comparison, the strength and durability of the transport carriage 10 are increased. Further, since the lower portion 34 of the second outer frame 33 is erected at the end of the rear end portion 60, the nesting direction can be overlapped in only one direction. That is, in the carriage 10, the lower 24 of the second outer frame 23 in the front frame portion 20, lower portion 34 of the second outer frame 33 at the rear frame portion 30 and the intermediate portion 55 and the shaft, when viewed state, approximately It is arranged at a point symmetrical position.

As described above, in the cart 10 during nesting, the lower part 24 of the second outer frame 23 in the front frame part 20 and the lower part 34 of the second outer frame 33 in the rear frame part 30 are substantially point- symmetric with respect to the intermediate part 55 as an axis. Since it is configured to be positioned, it can be overlapped only in one direction in a state where the carts are overlapped at the time of nesting. That is, the transport carriage 10 includes a front frame portion 20, a rear frame portion 30, a brake lock device 40, a front end portion 50, an intermediate portion 55, a rear end portion 60, a connecting portion 76, a chassis 80, and a pallet 90. Although the shape of the "king" is almost seen, the nesting state can be achieved by setting the front end of the next carriage behind the front end 50a in a state where the pallet 90 is rotated upward as will be described later. At the same time, the front side of the intermediate portion 55b of the next carriage is brought into contact with the rear side of the intermediate portion 55a. At the same time, they are overlapped so that the front side of the rear end portion 60b of the next carriage is in contact with the rear side of the rear end portion 60a. Thus, it can superimpose without a gap | interval by repeating the superposition | polymerization state of the conveyance trolley | bogie 10, and the aggregate | assembly of the trolley | bogie 10 can be piled up without a gap (refer FIG. 7). However, if the second outer frame 23 does not exist, when the carts 10 'without the second outer frame 23 are overlapped, they can be overlapped in the opposite manner. That is, the rear side of the front end portion 50b 'of the next carriage is in contact with the front side of the front end portion 50a' of the carriage 10 ', and at the same time, the rear side of the intermediate portion 55b' of the next carriage is in contact with the front side of the intermediate portion 55a '. . At the same time, they are overlapped so that the rear side of the rear end portion 60b 'of the next carriage is in contact with the front side of the rear end portion 60a' (see FIG. 8A). In this case, depending on the worker who performs the nesting work, there are a case where they are overlapped on the rear side of the front end portion 50a (see FIG. 7A) and a case where they are overlapped on the front side of the front end portion 50a ′ (see FIG. 8A). As described above, since the transportation carts that are superimposed in two ways cannot be overlapped without any gap, useless space is generated (see FIG. 8). That is, in FIG. 7, A and B can be overlapped with no gap, but in FIG. 8, A and B cannot be overlapped. In order to avoid this, the lower part 24 of the second outer frame 23 is provided. Accordingly, the lower portion 24 is a part of the second outer frame 23 and serves not only as a support for supporting the front frame portion 20, but also as a function of regulating the nesting direction of the transport carriage, and the second Since the outer frame portion is extended downward, the number of parts does not increase, which can contribute to cost reduction. 7 and 8, the pallet 90 is not shown.

  Connection portions 37, 37 are arranged in the lower portion of the rear frame portion 30. Further, the rotating plates 72 and 72 are constituted by rear frame joint portions 73 and 73 and base plate connection portions 74 and 74, and the connection portions 37 and 37 and the rear frame joint portion are formed by bolts 70 and 70 and nuts 71 and 71. 73 and 73 are connected so that rotation is possible. Further, the base plate connecting portions 74 and 74 in the rotating plates 72 and 72 are fixed by a pallet 90 and bolts 79 and 79. By adopting such a configuration, at the time of nesting, the pallet 90 is rotated so as to be pulled upward with the bolts 70 and 70 as fulcrums, and the pallet 90 that is in a substantially vertical state is leaned against the rear frame portion 30. Can do. Further, when the transport carriage 10 is used, the pallet 90 is rotated downward about the bolts 70 by placing the pallet 90 downward and placed on the carriage 80. In this case, the product can be carried on the pallet 90 placed on the chassis 80 and in a horizontal state. When the pallet 90 is leaned against the rear frame portion 30 in a substantially vertical state, the base plate fixing device 36 can be provided on the rear frame portion 30 in order to maintain the vertical state.

As described above, the connecting portions 37 and 37 are fixed to the lower portion of the rear frame portion 30, and the rotating plates 72 and 72 are rotatably attached via the bolts 70 and 70. Further, at least one of the right and left rotation plates 72, 72 located on both the left and right sides of the support column 31, the rear frame joint portion 73 of the rotation plate 72 and one end portion of the pivot 75 are substantially horizontal. It is fixed. The fixing method is a known method such as welding. The pivot shaft 75 is preferable even if the cross section is circular. Both end portions of the connecting portion 76 have cylindrical portions 77 and 78, and the other end portion of the pivot shaft 75 is rotatably inserted inside the cylindrical portion 77 located at one end portion thereof. Yes. In addition, a shaft 82 fixed to a cylindrical portion 81 described later is inserted inside the cylindrical portion 78 located at the other end portion of the connecting portion 76 so as to be rotatable with respect to the shaft 82. Accordingly, the pallet 90 can be rotated upward by adopting the above-described configuration. However, the rotation plates 72 and 72 located on both the left and right sides of the column 31 as well as any one of the columns 31 are used. It is preferable to adopt the above configuration for both. That is, the rear frame joint portions 73 and 73 of the rotating plates 72 and 72 and one end portions of the pivots 75 and 75 are fixed substantially horizontally, and both end portions of the connecting portions 76 and 76 are both cylindrical shaped portions 77 and 77 and Cylindrical portions 78 and 78 are provided, and the other ends of the pivots 75 and 75 are rotatably inserted into cylindrical portions 77 and 77 located at one end thereof. Further, a shaft 82 fixed to a cylindrical portion 81 described later is inserted into the cylindrical portions 78 and 78 located at the other end of the connecting portions 76 and 76, and can rotate with respect to the shaft 82. It becomes. Therefore, since it can also have the structure which can pull up the pallet 90 upwards in the both sides of the support | pillar 31, the operation | movement which rotates a pallet upward can be stabilized. The cylindrical portions 78 and 78 are preferably cylindrical . The shaft 82 is also preferable even if the cross section is cylindrical .

  The chassis 80 is composed of a rod-shaped member 84 having a hollow structure whose cross-sectional shape is a square shape. In order to ensure strength, a plurality of the rod-shaped members 84 may be arranged in parallel. A front end portion and an intermediate portion of the carriage 10 are fixed to the chassis 80, but a cylindrical portion 81 is provided at a portion located at the rear end portion. The tubular portion 81 has openings 85 and 86 penetrating upward and downward, and is fixed to the chassis 80 so that the openings 85 and 86 face the substantially vertical vertical direction with respect to the chassis 80.

The column receiving portion 62 is erected substantially vertically upward at a substantially central portion of the rear end portion 60. The tubular portion 81 is fitted to the outside of the support column receiving portion 62. Since vacant slight gap S between the case even if the fitting and the post receiving section 62 has a play with the tubular portion 81, the tubular portion 81 with respect to the strut receiving portion 62 Even if the cylindrical portion 81 is slightly inclined, it can slide. The support 31 of the rear frame portion 30 is inserted inside the support receiving portion 62 and fixed by bolts 38. The shaft 82 is fixed to the rear end side of the tubular portion 81. Here, the shaft 82 is substantially parallel to the pivot 75. In this state, the shaft 82 is rotatably inserted into the cylindrical portion 78 located at the other end of the connecting portion 76 as described above. The depression 88 avoids interference with the bolt 38 when the tubular portion 81 is pulled upward.

In the transport carriage 10 of the present invention as described above, an operation for changing from the travelable state to the nesting state will be described. In this case, even when the pallet 90 has a configuration that can be lifted upward on both sides of the support column 31, the operation is performed when the pallet is lifted upward on one side of the support column 31. Since it is the same, the case of one side will be described. When the operator rotates the pallet 90 upward, the rear frame joint portion 73 of the rotating plate 72 fixed to the pallet 90 moves upward. Further, the pivot 75 fixed to the rear frame joint 73 is also lifted upward (see FIG. 5). Since the pivot 75 is inserted inside the cylindrical portion 77 located at one end of the connecting portion 76, the connecting portion 76 is moved upward via the cylindrical portion 77 by pulling the pivot 75 upward. Pulled up. Furthermore, since the shaft 82 is also inserted inside the cylindrical portion 78 located at the other end of the connecting portion 76, the shaft 82 is also lifted upward via the cylindrical portion 78 in the connecting portion 76. As already described, since the shaft 82 is fixed to the rear end side of the cylindrical portion 81, the cylindrical portion 81 slides outside the support column receiving portion 62 and is lifted upward. Further, since the tubular portion 81 is fixed to the chassis 80, the rear end portion of the chassis 80 is pulled up. However, it is the cylindrical portion 81 that is lifted upward, and the column receiving portion 62 is not lifted upward. Accordingly, since the wheels 64 and 64 fixed to the rear end portion 60 are not pulled upward, the state in which the wheels 64 and 64 are in contact with the floor surface is maintained. Moreover, about the wheels 54 and 54 fixed to the front-end part 50, since the said wheels 54 and 54 are made into the fulcrum, the state which the said wheel contacted with the floor surface is maintained. Accordingly, the pair of intermediate wheels 56, 56 fixed to the bottom surface of the intermediate portion 55 by pulling up the rear end portion of the chassis 80 according to the movement of rotating the front end portion of the pallet upward, The two-to-four omnidirectional wheels 54, 54, 64, 64 arranged at the front end portion 50 and the rear end portion 60 can be lifted upward, and the intermediate wheels 56, 56 are separated from the floor surface and moved upward. Pulled up (see FIG. 6).

That is, as already described, one end is fixed to the pallet and the other end is rotatably connected to the connecting portions 37 and 37 of the rear frame portion 30, and the rotating plates 72 and 72. pivotally attached by inserting a pivot 75 fixed to the frame assembly 73 after the other on the inside of the cylindrical portion 77 located at one end portion of the connecting portion 76, and the other end of the connecting portion 76 The rear end of the chassis 80 according to the operation of rotating the pallet upward by the configuration in which the shaft 82 fixed to the cylindrical portion 81 is rotatably inserted inside the cylindrical portion 78 in FIG. The pair of two-wheeled intermediate wheels 56, 56 fixed to the bottom surface of the intermediate part 55 by pulling the part up from the two-to-four wheeled omnidirectional wheel disposed at the front end part 50 and the rear end part 60 Can also be raised upwards, the middle Wheels 56, 56 are off the floor surface, is pulled upward.

  Accordingly, when the nesting operation is performed in which the carriage 10 is moved in the short direction of the carriage (from the front side to the back side in FIG. 1), the intermediate wheel 56 in which the rotation of the wheel is fixed only in one direction in the longitudinal direction of the carriage. , 56 does not interfere with the movement of the cart in the short direction, so that nesting can be performed smoothly.

In the nesting state, the two-to-four wheels 54, 54, 64, 64 arranged on the bottom surfaces of the front end portion 50 and the rear end portion 60 are in contact with the floor surface, but the pair of intermediate wheels 56, 56 front end the carriage 10 is part of the rear end portion closer since a configuration to raise said intermediate wheels 56 and 56 by'll have rear end side of the as carriage 10 described above in a state not in contact with the floor surface It is in a state of being lifted upward from the portion closer to the part (see FIG. 6). But already the tubular portion 81 to the outside of the post receiving section 62-fitted as mentioned, a small gap S between the fitting portion has a play strut receiving portion 62 is empty Therefore, since the cylindrical portion 81 can slide with respect to the column receiving portion 62 even if the cylindrical portion 81 is slightly inclined, the movement of the fitting portion is smooth. Therefore, in the state where the pallet 90 is pulled upward, the upper part of the carriage 10 from the chassis 80 is slightly inclined to the front end side.

Further, since the pallet 90 is rotated upward to maintain the leaning state on the shelf frame, the pallet 90 and the rear end shelf frame can be fixed by the base plate fixing device 36. The lock member has a mouth shape and is fixed by engaging a portion of the mouth shape with the protrusion 91 of the pallet. By adopting such a configuration, the pallet 90 is not unexpectedly rotated downward, so that the nesting operation can be performed smoothly and can contribute to safety.

Next, in order to change from the nesting state to the travelable state, the base plate fixing device 36 provided in the rear frame part 30 is removed and the pallet 90 leaning against the rear frame part 30 is rotated downward. When the pallet 90 is rotated downward, the rear frame joint portion 73 of the rotating plate 72 fixed to the pallet also moves downward. Further, the pivot 75 fixed to the rear frame joint 73 also moves downward. Since the connecting portion 76 is inserted inside the pivot 75 and the cylindrical portion 77 located at one end of the connecting portion 76, the connecting portion 76 also moves downward as the pivot 75 moves downward. To do. Further, since the shaft 82 is inserted inside the cylindrical portion 78 at the other end of the connecting portion 76 and the shaft 82 is fixed to the cylindrical portion 81, the cylindrical portion 81 is outside the support column receiving portion 62. Slides and moves downward. Further, since the tubular portion 81 is fixed to the chassis 80, the rear end side of the chassis 80 moves downward.

That is, one end is fixed to the pallet and the other end is rotatably connected to the connecting portions 37 and 37 of the rear frame portion 30, and the pivot shaft 75 is fixed to the rotating plates 72 and 72. Is attached to the inside of the cylindrical portion 77 positioned at one end of the connecting portion 76 so as to be rotatable, and the cylindrical portion 81 is provided inside the cylindrical portion 78 at the other end of the connecting portion 76. The rear end portion of the chassis 80 moves downward in accordance with the movement of rotating the front end portion of the pallet 90 downward by the configuration in which the shaft 82 fixed to the shaft is rotatably inserted. The intermediate wheel of the pair of two wheels can be moved to the same position or further downward as the two-to-four omnidirectional wheel disposed at the front end portion and the rear end portion (see FIG. 4).

  Therefore, when transporting goods for moving the carriage 10 in the longitudinal direction of the carriage (front direction in FIG. 1), the intermediate wheel of the pair of two wheels is only in one direction of the carriage longitudinal direction (forward direction in FIG. 1). Since the rotation is fixed, straightness in the movement of the cart 10 in the longitudinal direction is ensured. Also, the pair of two-wheel intermediate wheels 56, 56 may move further downward than the two-to-four wheel omnidirectional wheels 54, 54 and 64, 64 disposed at the front end portion 50 and the rear end portion 60. If possible, or if the diameter of the intermediate wheels 56, 56 is larger than the two-to-four omnidirectional wheels 54, 54 and 64, 64 disposed at the front end 50 and the rear end 60, It is also possible to easily change the direction of the carriage 10 with the intermediate wheels 56 and 56 moved downward as fulcrums.

It is the whole front view of a trolley. 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. It is an enlarged view of the mechanism which pulls up a pallet. It is the side view which mounted the pallet on the frame. It is a side view in the middle of rotating above a pallet. It is the side view which rotated the pallet upward. In the state diagram at the time of nesting, A is a state diagram of the carriage group provided with the lower part, and B is a state diagram of the carriage group provided with the lower part. In the state diagram at the time of nesting, A is a trolley group not provided with a lower portion, and is a state diagram at the time of nesting different from the trolley group provided with a lower portion, and B is a state of nesting in the cart group provided with a lower portion FIG.

DESCRIPTION OF SYMBOLS 10 Carriage for trolley 20 Front frame part 30 Rear frame part 40 Brake lock device 50 Front end part 55 Intermediate part 60 Rear end part 72 Rotating plate 75 Pivot 76 Connecting part 81 Cylindrical part 82 Axis 90 Pallet

Claims (3)

Two-to-four omnidirectional wheels are arranged at the front end and rear end of the carriage , respectively, and one-to-two intermediate wheels are arranged in the middle of the trolley to move the pallet upward during nesting. Accordingly, the intermediate wheel of the pair of two wheels is lifted upward from the omnidirectional wheel of two to four wheels arranged at the front end portion and the rear end portion, and in use, according to the movement of rotating the pallet downward, It said intermediate wheel, in the transport carriage having the structure depressing downward, one end and the other end is fixed to the pallet and pivot plate is pivotally connected to the connecting portion of the rear frame portion, the rotating plate A fixed pivot is attached to the inside of the cylindrical part located at one end of the coupling body so as to be pivotable, and inside the cylindrical part at the other end of the coupling body, A fixed shaft is also inserted for rotation. Has a structure consisting of the rear end the tubular portion is fitted on the outside of the strut receiving portion are erected on, by pulling the shaft, to rotate the pallet upwards during the nesting motion Accordingly, the cylindrical part is pulled up, and when used, the cylindrical part is pulled down by the configuration according to the movement of rotating the pallet downward, and the pallet is rotated upward or downward. Accordingly , the transporting carriage is characterized in that the intermediate wheel can be moved up and down by moving the cylindrical part up and down with respect to the column receiving part . One end is fixed to the pallet and the other end is rotatably connected to the connecting portion of the rear frame portion, and the pivot portion fixed to the rotating plate is a cylindrical portion located at one end of the coupling body. A structure that is rotatably mounted by being inserted inside, and in which a shaft fixed to the cylindrical part is rotatably inserted inside the cylindrical part at the other end of the coupling body. The carriage for transportation according to claim 1, wherein the carriage is disposed on both sides of the column receiving portion . A lower part for restricting the nesting direction is provided in the front frame part and the rear frame part, and the lower part is erected on the front end part and the rear end part, and is integrated with the front frame part and the rear frame part. The transportation cart according to claim 1 or 2 .

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