JP2020082987A - Cargo moving bogie - Google Patents

Abstract

To provide a cargo moving bogie which can effectively reduce the weight of a bogie main body while maintaining the rigidity of the bogie main body in which an upper face plate and a pair of side face plates are integrally formed by applying bending processing to metal plates.SOLUTION: This cargo moving bogie comprises: an upper face plate 11 on which a cargo is placed; a pair of side face plates 12 extending downward from both sides of the upper face plate 11 in a width direction; a bogie main body 10 having a hollow part surrounded by the upper face plate 11 and the pair of the side face plates 12; a moving roller arranged in the hollow part, and moving on a bottom face of a groove; and a lift mechanism for ascending and descending the bogie main body 10 with respect to the moving roller. The upper face plate 11 and the pair of the side face plates 12 are integrally formed by bending metal plates, a plurality of holes 17 are formed at the side face plates 12, respectively, with intervals in a longitudinal direction; and a pair of sides 17c, 17c of the holes 17 which are aligned in the longitudinal direction with respect to each other approximate each other in distances toward an upper side.SELECTED DRAWING: Figure 5

Description

The present invention relates to a load transfer truck.

2. Description of the Related Art Conventionally, a plurality of grooves extending in the traveling direction of a vehicle are installed on the floor surface of a cargo bed of a vehicle such as a truck, and a cargo trolley arranged in the groove is used to facilitate movement of cargo within the cargo bed. .. As such a load transfer carriage, an upper surface plate on which a load is placed, a pair of side surface plates extending downward from both ends in the width direction of the upper surface plate, and a hollow portion surrounded by the upper surface plate and the pair of side surface plates. There is known a trolley body having the trolley body, a roller trolley arranged in the hollow portion, and an elevating mechanism for moving the trolley body up and down with respect to the roller trolley (for example, refer to Patent Document 1).

JP, 2016-145037, A

There are various types of loads placed on the loading platform, and a load of 500 kg or more may be applied to one loading truck. On the other hand, there are many cases where the load transfer carriage is not handled carefully in the carrier. Therefore, it is impossible to reduce the strength and durability of the carriage main body on which the load is placed in the load transfer carriage.

Here, the groove on the floor surface of the loading platform is not large, and inside the trolley body, a roller trolley for moving the trolley body, an elevating mechanism for raising and lowering the trolley body with respect to the roller trolley, etc. are provided. Be done. Therefore, the design space of the trolley body is limited. As an example, the upper plate and the pair of side plates are integrally formed by bending a metal plate such as a steel plate having a thickness of about 3 mm to secure the strength of the truck main body and the space of the hollow portion. It is being appreciated.

On the other hand, there is a demand for reducing the weight of the load carrying cart. The trolley body is made of metal, and is one of the major parts in the cargo trolley. Therefore, the weight reduction of the trolley body greatly contributes to the weight reduction of the entire load transfer trolley.

However, as described above, the strength and durability of the bogie body cannot be reduced. When a metal plate is bent to integrally form a top plate and a pair of side plates, the bending part has a buckling part and a stretched part. Is one. Particularly when a hole for lightening is provided in the side plate portion, the state of the bent portion may change depending on the presence or absence of the hole, which may be an unfavorable state.

The present invention has been made in view of the above circumstances. An object of the present invention is to effectively reduce the weight of a trolley body while maintaining the strength of the trolley body in which a top plate and a pair of side plates are integrally formed by bending a metal plate. It is the provision of a load-carrying truck that can do this.

In order to solve the above problems, the present invention employs the following means.
The load transfer vehicle according to one aspect of the present invention is arranged in a groove on the floor of the load carrier so as to have a long side in the longitudinal direction thereof, and an upper surface plate on which a load is placed, and from both sides in the width direction of the upper surface plate. A trolley body having a pair of side surface plates extending downward, a hollow portion surrounded by the upper surface plate and the pair of side surface plates, and a bottom surface of the groove provided in the hollow portion at intervals in the longitudinal direction. A plurality of moving rollers that roll the top to move the carriage main body in the groove in the longitudinal direction; and an elevating mechanism that raises and lowers the carriage main body with respect to the movement rollers. The pair of side plates are integrally formed by bending a metal plate, each side plate is formed with a plurality of holes at intervals in the longitudinal direction, and the holes are mutually It has a pair of sides arranged in the longitudinal direction, and the pair of sides are closer to each other in an upward direction.

In this configuration, a plurality of holes are formed in each side plate at intervals in the longitudinal direction of the bogie body, and each hole has a pair of sides arranged side by side in the longitudinal direction of the bogie body. Are closer to each other in the upward direction. Therefore, when the metal plate is bent to integrally form the upper surface plate and the pair of side surface plates, it is possible to effectively carry out lightening while avoiding stress concentration in the bending range or in the vicinity thereof.

In the above aspect, preferably, each of the holes has a substantially triangular shape, and sides other than the pair of sides extend in the longitudinal direction.
In this configuration, triangular vertices are arranged on the upper end side of the side plate, which is advantageous for weight reduction while avoiding stress concentration due to thinning in the bending range or its vicinity.

In the above aspect, preferably, each of the holes has a substantially trapezoidal shape, and a long side of the two sides other than the pair of sides extends in the longitudinal direction.
In this configuration, the trapezoidal upper bottom is arranged on the upper end side of the side plate, which is advantageous for weight reduction while avoiding stress concentration due to thinning in the bending range or its vicinity.

In the above aspect, preferably, the side plate is formed with the plurality of holes and a plurality of other holes alternately arranged in the longitudinal direction, and each of the other holes has an opening area smaller than that of the holes. The upper ends of the other holes are arranged below the upper ends of the holes.
With this configuration, the bogie body can be made lighter by forming the other holes. Further, the upper end of each of the other holes is arranged below the upper end of the hole, which is advantageous for avoiding stress concentration in the bending range or in the vicinity thereof.

In the above aspect, preferably, each of the other holes has a pair of sides arranged in the longitudinal direction with respect to each other, and the pair of sides of each of the other holes are distanced from each other in the downward direction. Is approaching.
If this structure is adopted, it is possible to lighten more effectively than, for example, making other holes circular, and moreover, stress distribution between holes when forming a side plate by bending a metal plate. Can be reduced.

According to the present invention, it is possible to effectively reduce the weight of a trolley body while maintaining the strength of the trolley body in which a top plate and a pair of side plates are integrally formed by bending a metal plate. ..

It is an important section sectional view of a load transfer truck of one embodiment of the present invention. It is a principal part sectional drawing of the load transfer vehicle of this embodiment. It is a disassembled perspective view of the load transfer vehicle of this embodiment. It is an explanatory view of the usage state of the load transfer vehicle of this embodiment. It is a perspective view of the trolley|bogie main body of the load transfer trolley|bogie of this embodiment. It is a side view of the trolley|bogie main body of the load transfer trolley|bogie of this embodiment. It is a principal part side view of the trolley|bogie main body which shows the 1st modification of the load transfer trolley|bogie of this embodiment. It is a principal part side view of the trolley|bogie main body which shows the 2nd modification of the load transfer trolley|bogie of this embodiment. It is a principal part side view of the trolley|bogie main body which shows the 3rd modification of the load transfer trolley|bogie of this embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A load transfer vehicle according to an embodiment of the present invention is described below with reference to the drawings.
As shown in FIGS. 1 to 4, the load transfer vehicle of the present embodiment is arranged in the groove 3 of the load carrier floor surface 2 so as to have a longitudinal direction in the longitudinal direction thereof. This load transfer truck has a top plate 11 on which a pallet 4 of a load is placed, a pair of side plates 12 extending downward from both ends of the top plate 11 in the width direction, and a top plate 11 and a pair of side plates 12. A plurality of bogie bodies 10 each having an enclosed hollow portion 14, and a plurality (three in this embodiment) arranged in the hollow portion 14 so as to be aligned in the longitudinal direction and connected so as to be tiltable in the vertical direction. Roller carriage 20 of.

The upper surface plate 11 extends from one end in the longitudinal direction of the carriage main body 10 or the vicinity of one end to the other end. In the present embodiment, a housing 13 for accommodating the lifting operation mechanism 30a is provided at one end in the longitudinal direction of the bogie body 10, and the housing 13 projects above the top plate 11. The elevating operation mechanism 30a has an operating portion 34 that is tiltably provided in the longitudinal direction, and the operating portion 34 has an insertion hole 34a into which an operating rod (not shown) is inserted. An opening is provided at the upper end of the housing 13, and the operation rod is inserted into the insertion hole 34a through the opening. In some cases, the carriage body 10 may not be provided with the housing 13 protruding upward from the top plate 11. Even in this case, the lifting operation mechanism 34 is arranged at one end side in the longitudinal direction of the carriage main body 10.

The longitudinal direction in the following description is the longitudinal direction of the groove 3 on the floor surface 2 of the loading platform and the trolley body 10. In addition, the one end side and the other end side in the longitudinal direction of the carriage main body 10 may be simply referred to as one end side and the other end side in the longitudinal direction, respectively.

As shown in FIGS. 1 and 2, each pair of side plates 12 of the carriage main body 10 is provided with two rolling element windows 12a. Each rolling element window 12 a is provided on one end side and the other end side of the side plate 12 in the longitudinal direction, and penetrates the side plate 12. In addition, rolling elements 15 rotatably supported by the trolley body 10 are provided in the rolling element windows 12a. As shown in FIG. 3, each rolling element 15 is mounted on the bogie body 10 by using a support shaft 15a coaxial with the rotation axis of the rolling body 15 and a fixing plate 15b for fixing the support shaft 15a to the bogie body 10. It is rotatably supported.

In one example, the rolling element 15 is a needle bearing without an inner ring, and the roller of the needle bearing is in contact with the outer peripheral surface of the support shaft 15a. The support shaft 15a is arranged so as to extend in a substantially vertical direction.
The rolling element 15 is rotatably supported by the bogie body 10 such that a part of the outer peripheral surface thereof projects from the side plate 12 of the bogie body 10 to the outside in the width direction of the bogie body 10. In the present embodiment, the outer peripheral surface of the rolling element 15 projects from the side surface plate 12 by about 1 mm.

As shown in FIG. 3 and the like, each roller carriage 20 has a moving roller 20a rotatably attached to one end and the other end in the longitudinal direction. The moving roller 20 a rolls on the bottom surface B of the groove 3 on the floor surface 2 of the loading platform. As a result, each roller carriage 20 and the carriage main body 10 move in the longitudinal direction in the groove 3 of the bed floor surface 2.

In one example, the elevating operation mechanism 30a includes the operation unit 34 and the link member 35. One end in the longitudinal direction of the link member 35 is connected to the operating portion 34 so as to be tiltable in the longitudinal direction, and the other end in the longitudinal direction of the link member 35 is vertically connected to one end in the longitudinal direction of the roller carriage 20 closest to the operating portion 34. It is connected so that it can tilt in any direction. The lifting operation mechanism 30 a is a part of the lifting mechanism 30, and the lifting mechanism 30 connects the roller carts 20 to each other so as to be tiltable in the vertical direction and the lower surface of the top plate 11 of the cart body 10. It has a plurality of fixed tilting members 33 and lift rollers 32 rotatably attached to each roller carriage 20. Each inclined member 33 has an inclined surface that is inclined downward toward the other end side in the longitudinal direction. The elevating rollers 32 are provided at positions corresponding to the plurality of tilting members 33, respectively.

When the operating portion 34 is tilted to one side by the operating rod, the plurality of roller carriages 20 are moved toward the other end side in the longitudinal direction via the link member 35 and the connecting member 31. As a result, the elevating rollers 32 of the roller carts 20 roll on the inclined surfaces of the inclined members 33, and the elevating rollers 32 are housed in the recesses 33a formed on the tops of the inclined members 33 as shown in FIG. To be done. As a result, the carriage main body 10 can be raised with respect to the roller carriage 20 and the moving roller 20a.

On the other hand, when the operating portion 34 is tilted to the other in the raised state, the plurality of roller carriages 20 are moved to one end side in the longitudinal direction with respect to the carriage main body 10. As a result, the elevating rollers 32 of the roller carts 20 roll on the inclined surfaces of the inclined members 33, and the elevating rollers 32 move to the foot of the inclined surfaces of the inclined members 34 as shown in FIG. As a result, the carriage main body 10 can be lowered with respect to the roller carriage 20 and the moving roller 20a.

The trolley body 10 is formed by bending a metal plate having a thickness of 2 mm to 5 mm by press molding or the like. Further, as shown in FIGS. 5 and 6, a plurality of upper surface holes 16 are formed in the upper surface plate 11 of the carriage body 10 at intervals in the longitudinal direction. In the present embodiment, each upper surface hole 16 has a round shape, but each upper surface hole 16 may have another shape. The metal plate is steel plate or the like.

As shown in FIGS. 5 and 6, a plurality of first side surface holes (holes) 17 are formed in each side surface plate 12 of the carriage body 10 at intervals in the longitudinal direction. In the present embodiment, each first side surface hole 17 has a triangular shape. Each first side surface hole 17 has a first side 17a and a second side 17b and a third side 17c, which are a pair of sides arranged in the longitudinal direction.

A corner R is formed between the first side 17a and the second side 17b, a corner R is formed between the first side 17a and the third side 17c, and a second side 17b is formed. A corner R is formed between it and the third side 17c. Therefore, it can be said that each first side surface hole 17 has a substantially triangular shape. Although the corner R of the first side surface hole 17 shown in FIGS. 5 and 6 is small, the same applies when the corner R is large.
The second side 17b and the third side 17c of each first side surface hole 17 are closer to each other in the upward direction.

As shown in FIG. 5 and FIG. 6, a plurality of second side surface holes 18 are formed in each side surface plate 12 of the carriage body 10 at intervals in the longitudinal direction. In the present embodiment, each second side surface hole 18 is an inverted triangle. That is, the second side surface hole 18 is a triangle that is upside down with respect to the first side surface hole 17. The opening area of each second side surface hole 18 is smaller than the opening area of each first side surface hole 17. The first side surface holes 17 and the second side surface holes 18 are alternately arranged in the longitudinal direction. Further, the second side surface hole 18 is arranged in the vertical arrangement position AR of the first side surface hole 17.

Each of the second side surface holes 18 has a first side 18a and a second side 18b and a third side 18c which are a pair of sides arranged in the longitudinal direction. A corner R is formed between the first side 18a and the second side 18b, a corner R is formed between the first side 18a and the third side 18c, and a corner R is formed between the first side 18a and the second side 18b. A corner R is formed between it and the third side 18c. Therefore, it can be said that each second side surface hole 18 has a substantially triangular shape. Although the corner R of the second side surface hole 18 shown in FIGS. 5 and 6 is small, the same applies when the corner R is large.

The second side 18b and the third side 18c of each second side surface hole 18 are closer to each other in the downward direction.
The upper surface hole 16, the first side surface hole 17, and the second side surface hole 18 are formed by press working or the like in one example, but may be formed by another working method.

Each first side surface hole 17 is closer to the lower end than the upper end of the side surface plate 12. The distance X of the first side surface hole 17 shown in FIG. 6 from the upper end of the side surface plate 12 is preferably 5 mm or more, and more preferably 8 mm or more. From another viewpoint, the distance X is preferably equal to or greater than the thickness of the metal plate, and is preferably equal to or greater than 1.5 times the thickness of the metal plate. If the first side surface hole 17 is provided near the lower end of the side surface plate 12, the weight of the carriage main body 10 can be effectively reduced.

When making the trolley body 10, first, a metal plate is cut into a band shape by pressing or the like. Further, the upper surface hole 16, the first side surface hole 17, and the second side surface hole 18 are formed in the metal plate. Either cutting or hole formation may be performed first.
Subsequently, a bending process is performed to bend one end side of the strip-shaped metal plate in the direction orthogonal to the longitudinal direction in the orthogonal direction. In addition, a bending process is performed to bend the other end of the strip-shaped metal plate in the orthogonal direction to the orthogonal direction. As a result, the upper surface portion 11 and the pair of side surface plates 12 are formed.

The trolley body 10 thus formed typically has a width of several tens of mm and a length of 1000 mm or more. In one example, the width is 55 mm to 65 mm, the length is 1200 mm to 1400 mm, and the height excluding the housing 13 is 25 mm to 35 mm.

In the present embodiment, a plurality of first side surface holes 17 are formed in each side surface plate 12 at intervals in the longitudinal direction, and each first side surface hole 17 has a pair of sides 17b arranged in the longitudinal direction. 17c, and the pair of sides 17b, 17c are closer to each other in the upward direction.
Therefore, when bending the band-shaped metal plate to form the pair of side plates 12, it is possible to effectively carry out lightening while avoiding stress concentration in the bending range or in the vicinity thereof.

In addition, in the present embodiment, the holes 16, 17, and 18 are provided in the upper surface plate 11 and the side surface plates 12, so that water easily escapes during cleaning. Further, since the trolley body 10 of the present embodiment is lightened, the workability can be improved and the possibility of injury or the like when accidentally dropped is reduced. Further, a plurality of upper surface holes 16 are provided in the upper surface plate 11, and further, first side surface holes 17 and second side surface holes 18 having mutually different sizes and directions are alternately arranged on each side surface plate 12. It effectively functions as a non-slip for the hands of workers.

Further, in the present embodiment, each first side surface hole 17 has a substantially triangular shape, and the first side 17a other than the pair of sides 17b and 17c extends in the longitudinal direction.
In this configuration, triangular vertices are arranged on the upper end side of the side plate 12, which is advantageous for weight reduction while avoiding stress concentration due to thinning in the bending range or its vicinity.

Further, in the present embodiment, each side surface plate 12 is formed with the second side surface holes 18 that are arranged alternately with the first side surface holes 17 in the longitudinal direction, and each second side surface hole 18 is more than each first side surface hole 17. The opening area is small, and the upper ends of the second side surface holes 18 are arranged below the upper ends of the first side surface holes 17.
With this configuration, the second side surface hole 18 is formed, so that the trolley body 10 can be made lighter. Further, the upper end of each second side surface hole 18 is arranged below the upper end of each first side surface hole 17, which is advantageous for avoiding stress concentration in the bending range or in the vicinity thereof.

In addition, in the present embodiment, each of the second side surface holes 18 has a pair of sides 18b and 18c that are aligned in the longitudinal direction, and the pair of sides 18b and 18c of each second side surface hole 18 face downward. The distance between them is getting closer.
If this configuration is adopted, it is possible to perform lightening more effectively than, for example, making the second side surface hole 18 into a circular shape, and further, when the side surface plate 12 is formed by bending a band-shaped metal plate. It is possible to reduce the bias of the stress distribution between the one side surface holes 17.

Note that, as shown in FIG. 7, the first side surface hole 17 may have a substantially trapezoidal shape. In this case, each first side surface hole 17 has a first side 17a, a second side 17b and a third side 17c, which are a pair of sides arranged in the longitudinal direction, and a fourth side 17d. Have.
A corner R is formed between the first side 17a and the second side 17b, a corner R is formed between the first side 17a and the third side 17c, and a second side 17b is formed. A corner R is formed between the fourth side 17d and the corner R, and a corner R is formed between the third side 17c and the fourth side 17d.

Even in this case, the second side 17b and the third side 17c of each first side surface hole 17 are closer to each other in the upward direction. Therefore, the same effect as when each first side surface hole 17 is substantially triangular can be achieved. The acute angle formed by the second side 17b and the third side 17c is preferably 10° or more, and more preferably 20° or more.

Note that, as shown in FIG. 7, the second side surface hole 18 may have a substantially trapezoidal shape. In this case, each second side surface hole 18 has a first side 18a, a second side 18b and a third side 18c, which are a pair of sides arranged in the longitudinal direction, and a fourth side 18d. Have.
A corner R is formed between the first side 18a and the second side 18b, a corner R is formed between the first side 18a and the third side 18c, and a second side 18b is formed. A corner R is formed between the third side 18c and the fourth side 18d, and a corner R is formed between the third side 18c and the fourth side 18d.

Even in this case, the second side 18b and the third side 18c of each second side surface hole 18 are closer to each other in the downward direction. Therefore, the same effect as when each second side surface hole 18 is an inverted triangle can be achieved. The acute angle formed by the second side 18b and the third side 18c is preferably 10° or more, and more preferably 20° or more.

Note that, as shown in FIG. 8, the upper end of the second side 17b of the first side surface hole 17 and the upper end of the third side 17c may be connected by a large arc. Further, the lower end of the second side 17b of the first side surface hole 17 and the lower end of the third side 17c may be connected by a large arc. Even in these cases, the second side 17b and the third side 17c of each first side surface hole 17 are closer to each other in the upward direction, so that each first side surface hole 17 has a substantially triangular shape. The effect of can be achieved.

Note that, as shown in FIG. 9, the second side 17b and the third side 17c of the first side surface hole 17 may not be straight lines but may be arcs that bulge outside the first side surface hole 17. The second side 17b and the third side 17c of the first side surface hole 17 may be arcs that bulge inward of the first side surface hole 17. Even in these cases, the second side 17b and the third side 17c of each first side surface hole 17 are closer to each other in the upward direction, so that each first side surface hole 17 has a substantially triangular shape. The effect of can be achieved.

Although FIG. 6 shows a right side view of the trolley body 10, the left side view of the trolley body 10 is a right side view. Further, in FIGS. 5 and 6, the first side surface hole 17 and the second side surface hole 18 provided in each side surface plate 12 characterize the bogie body 10 in appearance. Therefore, the bogie body 10 has a characteristic appearance even without the holes 16 in the top plate 11. Further, as described above, the carriage body 10 may not be provided with the housing 13 projecting upward from the upper surface plate 11, but even if the housing 13 is not provided, the first side surface hole 17 and the second side surface hole 18 allow The trolley body 10 has a characteristic appearance. The trolley body 10 is a main component used in the load transfer trolley. As described above, a load is placed on the trolley body 10, and the roller trolley 20 and the lifting mechanism 30 are housed in the hollow portion of the trolley body 10.

2 cargo bed floor surface 3 groove 10 trolley body 11 upper surface plate 12 side surface plate 13 housing 14 hollow portion 16 upper surface hole 17 first side surface hole (hole)
17a 1st side 17b 2nd side 17c 3rd side 17d 4th side 18 2nd side surface hole (other hole)
18a 1st side 18b 2nd side 18c 3rd side 18d 4th side 20 Roller truck 20a Moving roller 30 Lifting mechanism 30a Lifting operation mechanism 31 Connecting member 32 Lifting roller 33 Inclining member 33a Recess 34 Operating portion 34a Insert hole 35 Link member

Claims (5)

An upper surface plate which is disposed in the groove of the floor of the cargo bed so as to have a longitudinal direction in the longitudinal direction thereof and on which a load is placed; a pair of side surface plates extending downward from both sides of the upper surface plate in the width direction; A trolley body having a face plate and a hollow portion surrounded by the pair of side plates,
A plurality of moving rollers that are provided in the hollow portion at intervals in the longitudinal direction and that move the carriage body in the groove in the longitudinal direction by rolling on the bottom surface of the groove;
An elevating mechanism for elevating the carriage main body with respect to the moving roller,
The top plate and the pair of side plates are integrally formed by bending a metal plate,
A plurality of holes are formed in each side plate at intervals in the longitudinal direction,
Each of the holes has a pair of sides arranged in the longitudinal direction,
The load transfer truck, wherein the pair of sides are closer to each other in an upward direction. The load transfer truck according to claim 1, wherein each of the holes has a substantially triangular shape, and sides other than the pair of sides extend in the longitudinal direction. The load transfer truck according to claim 1, wherein each of the holes has a substantially trapezoidal shape, and a long side of the two sides other than the pair of sides extends in the longitudinal direction. The side plate has a plurality of holes and a plurality of other holes alternately arranged in the longitudinal direction,
The load transfer according to any one of claims 1 to 3, wherein each of the other holes has an opening area smaller than that of the hole, and an upper end of the other hole is arranged below an upper end of the hole. Dolly. Each of the other holes has a pair of sides arranged in the longitudinal direction with respect to each other,
The load transfer vehicle according to claim 4, wherein the pair of sides of each of the other holes are closer to each other in the downward direction.

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