JP2018165097A - Cargo box and dump truck with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable, in a cargo box, an upper side gate to be rotated easily and safely.SOLUTION: A rectangular parallelepipedic cargo box 10 having a pair of side walls 13 and open at the top is provided with plate-like upper side-gates 20 at the respective upper ends of the pair of side walls 13. Each upper side gate 20 is supported so as to be rotatable around a rotation shaft 21 extending in forward and backward directions and, in a standing position, forms a bulk increasing side-wall 30 together with the corresponding side wall 13, the bulk increasing side-wall being higher than the side wall 13 alone. In addition, the rotation shaft 21 is disposed such that the center of rotation is located further inside, in a vehicle width direction, than an external surface of, in the vehicle width direction, the side wall 13 as viewed from rear. Alternatively, an electric motor 22 in which the rotation shaft 21 is forcibly rotatable is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packing box mounted on a vehicle such as a dump truck, and more particularly to a side gate for increasing its bulk. Moreover, it is related with the dump truck provided with such a packing box.

  Conventionally, this type of packing box has both a demand to increase the capacity and a demand to facilitate loading and unloading. That is, if the side wall of the packing box is made higher, the capacity can be increased, but if so, the workability of unloading from the side of the vehicle is deteriorated.

  Thus, for example, as in Patent Document 1, a packing box mounted on a dump truck or the like in which a lower side gate is fixed to a side end of a floor board and an upper side gate is pivotally attached to an upper end of the floor plate is known. ing. As shown in FIGS. 8 and 9, such a packing box is connected by a hinge 120a provided at the upper end of the lower side gate (side wall) 113 so that the upper side gate 120 can be rotated outward in the vehicle width direction. Yes. Further, the upper side gate 120 is fixed by rotating the lock handle 116 with respect to the front wall 111 and the rear wall 112 of the packing box 110.

Japanese Utility Model Publication No. 63-41270

  However, in the conventional packing box 110, the higher the height, the heavier the weight, and the more complicated the operation of releasing the lock handle 116 and opening the upper side gate 120 safely is.

  In addition, as the weight increases, the upper side gate 120 must be supported by providing a large number of small hinges 120a in order to suppress the increase in the vehicle width due to the vehicle width limitation, and the number of parts is large and the load resistance is limited. is there.

  Further, in the configuration using the hinge 120a, the outer surfaces of the upper side gate 120 and the lower side gate 113 are arranged so as to be aligned in the vehicle width direction. Therefore, in order to minimize asperities on the inner surface of the packing box so that there is no sediment clogging during sediment discharge, it is necessary to make the thickness of both the upper side gate 120 and the lower side gate 113 comparable. It is difficult to reduce the weight. Therefore, the difficulty of opening and closing the upper side gate 120 at the high position is further increased.

  It is also known that a sheet-like canopy is provided at the upper end of the side wall so as to be pivotable to hold the top of the packing box to prevent scattering, but this canopy is weak enough to prevent scattering. It is a structure, and the capacity cannot be increased by increasing the bulk of the packing box.

  The present invention has been made in view of this point, and an object of the present invention is to enable the upper side gate to be rotated easily and safely.

In order to achieve the above object, the first invention presupposes a rectangular parallelepiped packing box having a side wall and opened upward,
The above packing box is
A plate that is supported at the upper end of the side wall so as to be pivotable about a pivot shaft extending in the front-rear direction, and forms a raised side wall that is taller than the side wall alone in cooperation with the side wall in an upright state With an upper side gate,
The center of rotation of the rotating shaft is located on the inner side in the vehicle width direction than the outer surface of the side wall in the vehicle width direction when viewed from the rear.

  According to the above configuration, the plate-like, not plate-like, highly rigid upper side gate can be erected on the upper portion of the side wall, so that the maximum capacity of the cargo box can be increased. In addition, since the rotation center of the rotation shaft is disposed on the inner side in the vehicle width direction than the outer surface of the side wall, an increase in the dimension toward the outer side in the vehicle width direction due to the rotation shaft can be suppressed. In addition, unlike the conventional hinge structure with the same outer surface position, it is not necessary to increase the thickness of the upper side gate just to align the inner surface in the vehicle width direction with the inner surface of the side wall, and it is lightweight with the minimum necessary thickness Therefore, the power required to open and close the upper side gate can be reduced.

In the second invention, on the premise of a rectangular parallelepiped packing box having a side wall and opened upward,
The above packing box is
A plate that is supported at the upper end of the side wall so as to be pivotable about a pivot shaft extending in the front-rear direction, and forms a raised side wall that is taller than the side wall alone in cooperation with the side wall in an upright state An upper side gate,
And an electric motor capable of forcibly rotating the rotation shaft.

  According to the above configuration, the plate-like, not plate-like, highly rigid upper side gate can be erected on the upper portion of the side wall, so that the maximum capacity of the cargo box can be increased. Further, since the upper side gate can be forcibly rotated by the electric motor, the opening / closing operation can be performed extremely safely and easily as compared with the case where the upper side gate is manually rotated. The “forced” described here refers to rotating the upper side gate against the dead weight of the upper side gate based on the drive command of the motor, and rotating the upper side gate downward in response to the driving force of the motor. This means that the operation is performed at a desired speed while regulating the urging force based on the gravity of the upper side gate while moving.

In the third invention, in the first invention,
The rotating shaft is configured to be forcibly rotated by an electric motor.

  According to said structure, since an upper side gate can be forcedly rotated with an electric motor, compared with the case where it rotates manually, it can open and close very safely and easily. In addition, since the rotation center of the rotation shaft is located on the inner side in the vehicle width direction than the outer surface of the side wall in the vehicle width direction, the electric motor connected to the rotation shaft is provided so as not to jump out in the vehicle width direction as much as possible. be able to.

In a fourth invention, in any one of the first to third inventions,
With the upper side gate raised, the inner surface of the upper side gate and the inner surface of the side wall are arranged substantially flush with each other.

  According to the above configuration, by making the inner surface of the packing box substantially flush, loads such as waste materials in the packing box are less likely to accumulate between the lower end of the upper side gate and the upper end of the side wall, making it easy to load and unload the load. It becomes. Note that “substantially flush” means that the inner surface of the upper side gate and the inner surface of the side wall do not have to be completely on the same plane, and are slightly inside or outside in the vehicle width direction so as not to hinder loading / unloading of the load. It means that it may be shifted.

In a fifth invention, in any one of the first to fourth inventions,
A reinforcing member is provided at the upper end of the side wall so as to extend back and forth,
The reinforcing member has a chamfered turning range of the upper side gate at an outer corner in the vehicle width direction.

  That is, by arranging the rotation center of the rotation shaft on the inner side in the vehicle width direction than the outer surface of the side wall, it becomes easy to interfere when the upper side gate is opened. However, according to the above configuration, chamfering prevents interference. Therefore, it becomes difficult to contact the upper end of the side wall. For this reason, the rotation range of the upper side gate can be made as wide as possible, and loading / unloading of the load from the vehicle width direction outside becomes easy.

  A dump truck according to a sixth aspect of the invention includes the packing box according to any one of the first to fifth aspects.

  According to the above configuration, it is possible to obtain a dump truck with high merchantability having a large capacity and having an upper side gate that can be opened and closed safely.

  As described above, according to the present invention, the pivot shaft that rotatably supports the plate-like upper side gate on the side wall is rotated inward in the vehicle width direction from the outer surface in the vehicle width direction of the side wall in the rear view. Arranged so that the center of motion is located. Further, the rotation shaft can be forcibly rotated by an electric motor. According to these inventions, the upper side gate can be rotated easily and safely.

It is a side view which shows the upper side gate of the standing state which concerns on embodiment of this invention, and its periphery. It is a side view which shows the dump truck which concerns on embodiment of this invention. It is a top view which shows a dump truck. It is a rear view which shows a dump truck. It is a rear view which expands and shows an upper side gate and its periphery. It is a top view which expands and shows an electric motor and its periphery. It is a rear view which expands and shows a rotating shaft and its periphery. It is a side view which shows the packing box which concerns on a prior art. It is sectional drawing which expands and shows the hinge of the packing box which concerns on a prior art, and its periphery.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  2 to 4 show a dump truck 1 having a packing box 10 according to an embodiment of the present invention. The dump truck 1 includes a chassis 2 that can run by driving an engine (not shown), and a cab 3. And. The dump truck 1 supports a rectangular parallelepiped box 10 whose upper side is open so that it can tilt around a support shaft 2b at the rear end of a subframe 2a of the chassis 2.

  The packing box 10 has a front fixed column 11 having a front wall 11a extending substantially vertically, a box-shaped rear fixed column 12 having a tail gate 12a extending substantially vertically, a pair of side walls 13, It has a substantially flat plate-like bottom wall 14 and a lower girder 15 extending back and forth to reinforce the bottom wall 14. The rear end of the lower girder 15 is supported so as to be engageable with the support shaft 2b at the rear end of the subframe 2a, and the packing box 10 is tilted by a tilting cylinder or the like (not shown) as shown by a two-dot chain line in FIG. It is like that. As shown in FIG. 4, the tailgate 12a is a double door spread type in the left-right direction. However, the tailgate 12a may be rotatable in the vertical direction about a horizontally extending axis.

  In the present embodiment, as shown in FIG. 5, the pair of side walls 13 are fixed to the bottom wall 14 by welding or the like (Note that although the side walls 13 are fixed, the lower side as in Patent Document 1 is used. Sometimes called side gate). As shown also in FIG. 1, the side wall 13 is moderately reinforced by a stiffener 13a made of a square steel pipe or the like extending in the front-rear direction or the vertical direction.

  As shown in FIG. 7 in an enlarged manner, the upper end of the side wall 13 is provided with a reinforcing member 13c that extends in the front-rear direction and has an inclined surface 13b whose corners on the outer side in the vehicle width direction and the upper side are chamfered. A lower boss portion 13d (shown in FIG. 1) is fixed to the reinforcing member 13c at a predetermined interval. In addition, the round steel 13e is also welded to the upper surface of the reinforcing member 13c.

  A plate-like upper side gate 20 is rotatably supported at the upper end of the side wall 13. Unlike the sheet-shaped canopy, the upper side gate 20 has a main body formed of a welded structure such as a steel plate or a square steel pipe, and its height does not exceed the front fixed column 11 and the rear fixed column 12. It has become. As shown also in FIG. 1, a plurality of upper boss portions 20a are formed at the lower end of the upper side gate 20, and are reinforced by a square steel pipe 20b or the like to such an extent that the weight does not become too heavy. As shown in FIG. 7, the upper boss portion 20a is reinforced by welding reinforcing ribs 20c extending in the left-right direction and the up-down direction. A rotating shaft 21 extending in the front-rear direction is inserted through the upper boss portion 20a and the lower boss portion 13d. Note that a grease nipple 13f is appropriately provided on the lower boss portion so that the rotation resistance of the rotation shaft 21 can be reduced by replenishing grease. Moreover, the electric motor 22 side (front side) part of the rotating shaft 21 is rotatably supported by a support bracket 11c provided on the front wall 11a. The rotating shaft 21 can be forcibly rotated by an electric motor 22 as an electric motor. As shown in FIG. 6, the electric motor 22 has a motor body 22a and a speed reducer 22b connected to the output shaft of the motor body 22a. The output shaft 22c of the speed reducer 22b is a rotating shaft 21. And are connected integrally with the rotation. The electric motor 22 is supported in a space between the cab 3 and a motor mounting bracket 11b provided on the front wall 11a. The amount of protrusion of the electric motor 22 to the outside in the vehicle width direction is minimized.

  As shown in FIG. 1, lock plates 20 d are provided at the front and rear corners of the upper side gate 20. The upper side gate 20 can be manually locked by sandwiching the lock plate 20d with lock levers 16 provided on the front wall 11a and the rear wall 12, respectively. Note that the lock lever 16 may be automatically moved by hydraulic pressure, electric drive or the like, not manually.

  In this manner, the upper side gate 20 is supported so as to be rotatable about the rotation shaft 21 and cooperates with the side wall 13 in an upright state to form a raised side wall 30 that is taller than the side wall 13 alone. To play a role. That is, by raising the upper side gate 20, the side wall 30 can secure a height obtained by adding the two side walls 13 and 20.

  As shown in an enlarged view in FIG. 7, when the rotation shaft 21 is viewed from the back, the rotation center O is located on the inner side in the vehicle width direction than the outer surface in the vehicle width direction of the side wall 13. Then, with the upper side gate 20 raised, the inner surface of the upper side gate 20 and the inner surface of the side wall 13 are arranged substantially flush with each other. As can be seen from FIG. 7, the upper side gate 20 is shifted to the outside in the vehicle width direction by about one steel plate, but the corner portion on the inner side in the vehicle width direction of the reinforcing member 13c is subjected to R bending 13g. Because it is, it is difficult to catch dust.

  And the rotation range of the upper side gate 20 in the corner | angular part of the vehicle width direction outer side of the reinforcement member 13c provided in the upper end of the side wall 13 is chamfered, and the inclined surface 13b is formed. The angle of the inclined surface 13b is set such that the reinforcing rib 20c does not come into contact when the upper side gate 20 opens most outward in the vehicle width direction, as indicated by a two-dot chain line in FIG.

  With this configuration, in the present embodiment, a plate-like, not plate-like, highly rigid upper side gate 20 can be erected on the side wall 13, so that the maximum capacity of the packing box 10 can be increased. it can.

  Further, since the rotation center O of the rotation shaft 21 is arranged on the inner side in the vehicle width direction than the outer surface of the side wall 13, an increase in the dimension toward the outer side in the vehicle width direction by the rotation shaft 21 can be suppressed.

  Further, unlike the conventional hinge structure, it is not necessary to increase the thickness of the upper side gate 20 just to align the inner surface in the vehicle width direction with the inner surface of the side wall 13, and it is lightweight with the minimum necessary thickness. It can be.

  Further, since the upper side gate 20 can be forcibly rotated by the electric motor 22, the opening / closing operation can be performed extremely safely and easily as compared with the case where the upper side gate 20 is manually rotated.

  Further, by making the inner surface of the packing box 10 substantially flush, the load is unlikely to collect between the lower end of the upper side gate 20 and the upper end of the side wall 13, so that the load can be easily loaded and unloaded.

  Further, although the rotation center O of the rotation shaft 21 is arranged on the inner side in the vehicle width direction than the outer surface of the side wall 13, when the upper side gate 20 is opened, chamfering is performed, so that the upper end of the side wall 13 is obstructive. Don't be. For this reason, the rotation range of the upper side gate 20 is wide, specifically, the rotation angle is increased, and the upper side gate 20 can be brought close to a drooping state along the vertical direction. Easy loading and unloading of goods. In addition, since it is not necessary to manually open and close the upper side gate 20, the pivot shaft 21 is provided at a high position so that the height of the upper side gate 20 is reduced, and the pivot radius is reduced to reduce the space around the vehicle. The influence exerted can be reduced, or the rotational axis 21 can be provided at a low position so that the height of the side wall 13 can be lowered, and the open area for loading and unloading the load from the outside can be set large.

  Therefore, according to the packing box which concerns on this embodiment, the upper side gate 20 can be rotated easily and safely. Moreover, the dump truck 1 with high merchantability having a large capacity and having the upper side gate 20 that can be opened and closed safely can be obtained.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above-described embodiment, the example in which the packing box is tiltably mounted on the dump truck 1 has been described. However, the packing box may be mounted on a vehicle such as a so-called detachable vehicle or a trailer.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Dump truck
2 Chassis
2a Side frame
2b Support shaft
3 cab
10 Packing box
11 Front fixed column
11a Front wall
11b Motor mounting bracket
11c Support bracket
12 Rear wall
12a Tailgate
13 Side wall
13a stiffener
13b inclined surface
13c Reinforcing member
13d Lower boss
13e Round steel
13f Grease nipple
13g R bending
14 Bottom wall
15 Lower digit
16 Lock lever
20 Upper side gate
20a Upper boss
20b square steel pipe
20c Reinforcement rib
20d lock plate
21 Rotating shaft
22 Electric motor
22a Motor body
22b reducer
22c Output shaft
30 side walls

Claims (6)

In a rectangular parallelepiped packing box having a side wall and opened upward,
A plate that is supported at the upper end of the side wall so as to be pivotable about a pivot shaft extending in the front-rear direction, and forms a raised side wall that is taller than the side wall alone in cooperation with the side wall in an upright state With an upper side gate,
The cargo box according to claim 1, wherein the pivot shaft has a pivot center located on the inner side in the vehicle width direction with respect to the outer surface in the vehicle width direction of the side wall in rear view. In a rectangular parallelepiped packing box having a side wall and opened upward,
A plate that is supported at the upper end of the side wall so as to be pivotable about a pivot shaft extending in the front-rear direction, and forms a raised side wall that is taller than the side wall alone in cooperation with the side wall in an upright state An upper side gate,
A packing box comprising: an electric motor capable of forcibly rotating the rotating shaft. The packing box according to claim 1,
The packing box, wherein the rotating shaft is configured to be forcibly rotated by an electric motor. In the packing box according to any one of claims 1 to 3,
A packing box, wherein an inner surface of the upper side gate and an inner surface of the side wall are disposed substantially flush with the upper side gate standing. In the packing box according to any one of claims 1 to 4,
A reinforcing member is provided at the upper end of the side wall so as to extend back and forth,
The packing box according to claim 1, wherein the reinforcing member has a chamfered turning range of the upper side gate at an outer corner in the vehicle width direction. A dump truck comprising the packing box according to any one of claims 1 to 5.

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