JP6726586B2 - Lorry - Google Patents

Description

TECHNICAL FIELD The present invention relates to a freight vehicle capable of a dumping operation for inclining a luggage box and a sliding operation for sliding the luggage box backward in an inclined state.

2. Description of the Related Art Conventionally, a freight vehicle capable of performing a dumping operation for inclining a luggage box and a sliding operation for sliding the luggage box in a tilted state is known (for example, see Patent Document 1). This type of lorry can suitably perform both transportation of earth and sand and transportation of construction vehicles, for example. When transporting earth and sand, it is possible to discharge the earth and sand from the packing box to the ground by performing a dumping operation after reaching the destination. When carrying a construction vehicle, the rear part of the luggage box can be grounded by performing a sliding operation. This facilitates the work of loading the construction vehicle into the packing box and the work of unloading the construction vehicle from the packing box.

Such a freight vehicle generally includes a sub-frame arranged on a chassis frame, a chipping frame rotatably supported at a rear end of the sub-frame by a hinge shaft extending in the vehicle width direction, and a chipping frame. And a luggage box slidably supported by the frame. When the sliding operation is performed, the tipping frame is once tilted by rotating it about the hinge axis, and then the luggage box is slid backward with respect to the tipping frame.

FIG. 8 is a rear view of an example of such a conventional freight vehicle 100. The lorry 100 includes a tail lamp 102. The tail lamp 102 is supported by a stay 101 extending in the vehicle width direction. One end of the stay 101 is fixed to the chipping frame, and the tail lamp 102 is supported by the other end of the stay 101.

Japanese Patent No. 2581974

In the above-mentioned freight car 100, the tail lamp 102 is fixed to the chipping frame via the stay 101, so that the tail lamp 102 does not slide backward during the sliding operation. Therefore, the tail lamp 102 is not affected by the sliding operation. However, the tail lamp 102 is cantilevered by the stay 101. In the cantilevered state, it is easily affected by vibration while the vehicle is traveling. As described above, in the freight vehicle 100, the tail lamp 102 is designed so as not to be affected by the sliding operation, but the tail lamp 102 is easily affected by the vibration while the vehicle is running, so that the life thereof tends to be shortened.

The present invention has been made in view of the above points, and an object of the present invention is to provide a tail lamp in a freight vehicle capable of a dumping operation for inclining a luggage box and a sliding operation for sliding the luggage box rearward in an inclined state. It is to prolong the service life.

A freight vehicle according to the present invention includes a chassis frame, a subframe disposed on the chassis frame, and a chipping frame rotatably supported at a rear end portion of the subframe by a hinge shaft extending in a vehicle width direction. When having a tail panel extending downward from the rear end of the bottom plate and the bottom plate, a packing box which is slidably supported along the longitudinal direction of the tipping frame for the tipping frame, fixed to said tail panel The tail lamp is

According to the above-mentioned truck, since the tail lamp is fixed to the tail panel of the luggage box, the tail lamp slides backward together with the luggage box during the sliding operation. However, the inventor of the present application has noticed that the sliding operation is a relatively stable operation, and the vibration accompanying the sliding operation of the luggage box is smaller than the vibration during traveling of the vehicle. Further, the inventor of the present application has noticed that in a freight vehicle, the cumulative time of sliding motion is shorter than the cumulative traveling time of the vehicle. Based on this point of view, the tail lamp is fixed to the tail panel of the luggage box. According to the above-mentioned truck, since the tail lamp is fixed to the tail panel of the luggage box, it is less likely to be affected by vibration during traveling, as compared with the conventional case where the tail lamp is supported by a cantilever. Therefore, the life of the tail lamp can be extended.

According to a preferred aspect of the present invention, the tail lamp is arranged below the tail panel.

According to the above aspect, a tail lamp having good visibility can be obtained.

According to another preferred aspect of the present invention, the tail lamp includes a bracket extending downward from a rear end portion of the bottom plate of the packing box, and a ground roller rotatably supported on a lower end portion of the bracket. The grounding roller and the grounding roller are arranged side by side vertically.

According to the above aspect, the size of the tail lamp and the ground roller in the vehicle width direction can be increased without increasing the size of the tail lamp and the ground roller in the vehicle width direction as compared with the case where the tail lamp and the ground roller are arranged side by side. You can

According to another preferred aspect of the present invention, the dimension of the ground roller in the vehicle width direction is larger than the dimension of the tail lamp in the vehicle width direction.

According to the above aspect, the size of the ground roller in the vehicle width direction can be increased. Therefore, during the sliding operation, the luggage box can be stably grounded on the ground.

According to another preferred aspect of the present invention, a bell crank having a first end portion and a second end portion and a jack roller connected to the second end portion via a link mechanism are provided. The first end moves downward as the box slides rearward, the jack roller rotates downward toward the grounding position, and the first end slides forward as the luggage box slides. And a rear bumper arranged below the bell crank, wherein the jack roller is configured to move upward to rotate the jack roller to a storage position above the grounding position. The upper end of the jack roller when the roller is in the storage position is located above the lower end of the rear bumper.

According to the above aspect, when the vehicle is traveling, the jack roller is in the accommodation position, and the upper end of the jack roller is located above the lower end of the rear bumper. Therefore, the minimum ground clearance when the vehicle is running is higher than that of a conventional freight vehicle (see FIG. 8) in which the upper end of the jack roller is located below the lower end of the rear bumper.

ADVANTAGE OF THE INVENTION According to this invention, in a freight vehicle which can perform the dumping operation|movement which inclines a luggage box, and the sliding operation which slides back in the state which inclined the luggage box, a tail lamp can be extended in life.

It is a side view of the freight car concerning one embodiment of the present invention. It is a side view at the time of dump operation of the above-mentioned freight car. It is a side view at the time of slide operation of the above-mentioned lorry. It is a rear view of the said lorry. It is a side view of a jack. It is a side view of a jack when a packing box slides. It is a rear view of the lorry which concerns on other embodiment. It is a rear view of the conventional truck.

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a freight vehicle 1 according to this embodiment includes a chassis frame 10, a cab 2 supported by the chassis frame 10, and a subframe 20 disposed behind the cab 2 and above the chassis frame 10. The chipping frame 30 is rotatably supported at the rear end of the sub-frame 20 by the hinge shaft 5 extending in the vehicle width direction, and the load box 40 is slidably supported by the chipping frame 30. The chassis frame 10 supports front wheels 3F and rear wheels 3B. Inside the cab 2, a driver's seat (not shown) is provided. In the following description, unless otherwise specified, front, rear, left, right, upper, and lower mean front, rear, left, right, upper, and lower as seen from the driver sitting in the driver's seat. And

The chassis frame 10 and the subframe 20 each extend in the front-rear direction. The sub-frame 20 is fixed to the chassis frame 10. As shown in FIG. 2, the freight vehicle 1 can perform a dumping operation of inclining the luggage box 40. The sub-frame 20 and the chipping frame 30 are connected by a hoist mechanism 50. The hoist mechanism 50 includes a lift arm 52, a tension link 53, and a hydraulic cylinder 51. When the hydraulic cylinder 51 is contracted, the chipping frame 30 is in a horizontal state as shown in FIG. 1, and the luggage box 40 is in a horizontal posture. Hereinafter, this state is referred to as a non-dump state. On the other hand, as shown in FIG. 2, when the hydraulic cylinder 51 extends, the front part of the chipping frame 30 is lifted, and the chipping frame 30 rotates about the hinge shaft 5 and tilts. As a result, the luggage box 40 tilts backward and downward. Hereinafter, this state is referred to as a dump state. In the present embodiment, the hydraulic cylinder 51 constitutes a dump actuator that tilts the chipping frame 30 and the luggage box 40. Although not shown, the freight vehicle 1 includes a lock mechanism that locks the luggage box 40 against the chipping frame 30 so as not to slide. During the dumping operation, the lock mechanism is turned on and the luggage box 40 is prevented from sliding.

As shown in FIG. 3, the freight vehicle 1 can perform a sliding operation of sliding the luggage box 40 in a tilted state to the rear. The hoist mechanism 50 is not shown in FIG. Although illustration is omitted, the freight vehicle 1 includes another hydraulic cylinder as a slide actuator that slides the luggage box 40 back and forth. One end of this hydraulic cylinder is connected to the chipping frame 30, and the other end is connected to the luggage box 40. When the packing box 40 is slid backward, the chipping frame 30 is tilted by the hoist mechanism 50. The tilt angle of the chipping frame 30 during the slide operation and the dump operation is not particularly limited, but the tilt angle of the chipping frame 30 during the slide operation is smaller than the tilt angle of the chipping frame 30 during the dump operation. During the sliding operation, the lock mechanism is turned off to allow the luggage box 40 to slide with respect to the chipping frame 30. Then, the load cylinder 40 is slid rearward along the chipping frame 30 by extending the hydraulic cylinder.

As shown in FIG. 1, a bracket 42 extending downward is fixed to a rear end portion of a bottom plate 41 of the luggage box 40. A ground roller 43 is rotatably supported at the lower end of the bracket 42. As shown in FIG. 4, a pair of the bracket 42 and the ground roller 43 are provided on the left and right. Each bracket 42 has a first arm 42A, a second arm 42B spaced apart from the first arm 42A in the vehicle width direction, and a support plate 43C suspended and supported by the first arm 42A and the second arm 42B. ing. The ground roller 43 is supported by the support plate 43C. When the luggage box 40 is slid backward as shown in FIG. 3, the grounding rollers 43 are grounded and the luggage box 40 is supported on the ground.

As shown in FIG. 1, the luggage box 40 has a tailgate 45 that forms a rear wall, and a tail panel 44 that extends downward from a rear end portion of the bottom plate 41. The tailgate 45 is rotatably supported by a hinge shaft 46 provided at an upper end portion of the tailgate 45, and is rotatably supported by a hinge shaft 47 provided at a lower end portion of the tailgate 45. .. When discharging the earth and sand, the tailgate 45 can be rotated around the hinge shaft 46, so that the earth and sand in the load box 40 can be discharged to the ground as the load box 40 is inclined. When loading or unloading the construction vehicle, the tailgate 45 can be rotated around the hinge shaft 47 to easily load the construction vehicle into the luggage box 40, or the construction vehicle can be easily removed from the luggage box 40. Can be taken down.

As shown in FIG. 4, the freight vehicle 1 includes a tail lamp 60. The tail lamp 60 is fixed to the tail panel 44. The tail lamp 60 may be directly fixed to the tail panel 44, or may be indirectly fixed to the tail panel 44 via another member such as a bracket. In the present embodiment, the tail lamp 60 is arranged below the tail panel 44 and is suspended and supported by the tail panel 44. The tail lamp 60 does not entirely overlap the tail panel 44 when viewed from the rear of the vehicle. However, when viewed from the rear of the vehicle, part or all of the tail lamp 60 may overlap the tail panel 44.

The tail lamp 60 is formed in a rectangular shape whose lateral dimension is larger than its vertical dimension when viewed from the rear of the vehicle. However, the shape of the tail lamp 60 is not particularly limited. The tail lamp 60 is arranged above the ground roller 43. The tail lamp 60 is arranged between the first arm 42A and the second arm 42B of the bracket 42 in the vehicle width direction (the vehicle width direction is synonymous with the left-right direction). The tail lamp 60 and the ground roller 43 are arranged vertically side by side. A part of the tail lamp 60 and a part of the ground roller 43 are located on the same vertical line. In other words, a part of the tail lamp 60 and a part of the ground roller 43 have the same horizontal position. The dimension 43W of the ground roller 43 in the vehicle width direction is larger than the dimension 60W of the tail lamp 60 in the vehicle width direction.

A rear bumper 70 is fixed to the rear end of the chassis frame 10. The rear bumper 70 may be directly fixed to the chassis frame 10 or indirectly fixed through another member such as a bracket. The rear bumper 70 is immovably fixed to the chassis frame 10. The position of the rear bumper 70 with respect to the chassis frame 10 is the same when the chipping frame 30 is horizontal and when the chipping frame 30 is inclined.

As shown in FIG. 1, in the non-dumped state, the ground roller 43 is located above the rear bumper 70. When the hydraulic cylinder 51 expands and shifts from the non-dumped state to the dumped state, the ground roller 43 moves forward above the rear bumper 70. Then, as shown in FIG. 2, when the dumped state is reached, the ground roller 43 is located in front of the rear bumper 70.

As shown in FIGS. 5 and 6, the freight vehicle 1 includes the jack 80 that supports the front portion of the luggage box 40 when the luggage box 40 is slid backward and the grounding roller 43 is grounded. The jack 80 has a bell crank 81, arms 82, 83, 84, a jack roller 85, and a jack bracket 12. A bracket 31 protruding downward is fixed to the chipping frame 30. The bell crank 81 has a first end 81a to which a roller 81d is attached and a second end 81b, and is rotatably supported by the bracket 31 by a shaft 81c extending in the vehicle width direction. One end of the arm 82 is rotatably connected to the second end 81b of the bell crank 81. The other end of the arm 82 is rotatably connected to the arm 83. The arm 83 and the arm 84 are fixed. The base of the arm 84 is rotatably supported by the jack bracket 12 by a shaft 87 extending in the vehicle width direction. The jack bracket 12 is fixed to the chassis frame 10. The jack roller 85 is rotatably supported on the tip of the arm 84.

The arms 82, 83, 84 form a link mechanism that connects the second end 81 b of the bell crank 81 and the jack roller 85. In the jack 80, when the first end 81a of the bell crank 81 moves downward, the jack roller 85 rotates downward toward the ground contact position, and when the first end 81a moves upward, the jack roller 85 moves from the ground contact position. Is also configured to rotate to the upper storage position.

The bottom plate 41 of the luggage box 40 is provided with a stopper 91 and a guide 92. The stopper 91 and the guide 92 project downward from the bottom plate 41. However, the stopper 91 and the guide 92 do not necessarily have to be provided on the bottom plate 41, and may be provided on another portion of the luggage box 40. The stopper 91 is arranged behind the guide 92.

The stopper 91 moves the jack 80 to the storage position by pushing the first end 81a upward when the luggage box 40 slides forward. Further, the stopper 91 prevents the first end 81a from moving downward (clockwise in FIG. 5) due to the weight of the jack 80 after the luggage box 40 slides forward and the first end 81a moves upward. In addition, the position of the first end portion 81a is held. It should be noted that the term “downward” as used herein includes an obliquely downward direction, and the “upward” includes an obliquely upward direction. Here, the stopper 91 is formed in a rectangular shape when viewed from the side. Since the stopper 91 holds the position of the first end 81a, the jack 80 is kept in the storage position.

A front surface 92a of the guide 92 extends obliquely forward and upward, and a rear surface 92b thereof extends obliquely rearward and upward. When the luggage box 40 slides backward, the stopper 91 slides backward together with the luggage box 40. When the stopper 91 slides rearward, the support by the stopper 91 disappears, and the first end 81a of the bell crank 81 rotates rearward (clockwise in FIG. 5) due to the weight of the jack 80. As a result, the jack 80 moves to the grounding position. However, when it is difficult for the first end 81a to rotate due to the weight of the jack 80 when the luggage box 40 slides backward, the guide 92 pushes the first end 81a to move the first end 81a. It can be forcibly rotated to the rear of the vehicle. That is, the guide 92 can forcefully move the jack 80 to the ground contact position.

Further, another guide 93 is provided on the bottom plate 41 of the luggage box 40. The guide 93 projects downward from the bottom plate 41. The guide 93 is arranged at a position displaced from the guide 92 in the vehicle width direction. An arm 88 is rotatably supported on the bracket 31 by a shaft 32 extending in the vehicle width direction. A roller 89 is attached to the tip of the arm 88. The guide 93 plays a role of pressing the bell crank 81 with the arm 88 so that the jack 80 does not move even when the jack 80 receives a force from the rear when the jack roller 85 is grounded (see FIG. 6 ).

As shown in FIG. 5, the rear bumper 70 is arranged below the bell crank 81. The upper end 85t of the jack roller 85 when the jack roller 85 is at the storage position is located above the lower end 70d of the rear bumper 70. Here, the lower end 85d of the jack roller 85 in the storage position is located above the lower end 70d of the rear bumper 70. However, it is not limited to such a positional relationship. The jack roller 85 and the rear bumper 70 are lined up front and rear, and a part of the jack roller 85 and a part of the rear bumper 70 are at the same position in the vertical direction.

At least a part of the jack 80 is arranged above the rear bumper 70 and in front of the rear bumper 70. A reflector 75 is arranged above the rear bumper 70 and at least behind a portion of the jack 80. The reflector 75 is fixed to the jack bracket 12. As shown in FIG. 4, here, the reflection plate 75 is not attached to the rear surface of the rear bumper 70, but is arranged above the rear bumper 70.

Vibration occurs in the lorry 1 during traveling. Further, vibration also occurs during the dumping operation and the sliding operation. When the tail lamp 60 vibrates, the life of the tail lamp 60 tends to be shortened. In the conventional freight vehicle 100 shown in FIG. 8, the tail lamp 102 is fixed to the chipping frame via the stay 101 so that the tail lamp 102 does not move during the sliding operation. Thereby, the vibration of the tail lamp 60 during the sliding operation can be suppressed. However, since the tail lamp 102 is cantilevered by the stay 101, the tail lamp 102 is easily affected by vibration while the vehicle is traveling.

The inventor of the present application found that the sliding operation of the freight vehicle 1 was relatively stable. It was noted that the vibration caused by the sliding movement of the luggage box 40 is smaller than the vibration while the vehicle is traveling. Further, in the freight car 1, it was noticed that the time for performing the sliding operation is shorter than the traveling time of the vehicle. Then, by considering the vibration during traveling of the vehicle and the vibration during the sliding operation, even if the tail lamp 60 is fixed to the member that slides with the sliding operation, by suppressing the vibration that the tail lamp 60 receives during traveling of the vehicle, As a result, I realized that the life of the tail lamp 60 can be extended. In the freight vehicle 1, the tail lamp 60 is fixed to the tail panel 44 of the luggage box 40 based on such an idea.

According to the truck 1 of the present embodiment, the tail lamp 60 is fixed to the tail panel 44 of the luggage box 40, so that the tail lamp 60 is supported relatively firmly when the vehicle is traveling. Therefore, the tail lamp 60 is less likely to be affected by vibration during traveling, as compared with a freight vehicle (see FIG. 8) in which the tail lamp 102 is cantilevered by the stay 101. Therefore, the life of the tail lamp 60 can be extended.

How the tail lamp 60 is arranged with respect to the tail panel 44 is not particularly limited, but in the present embodiment, the tail lamp 60 is arranged below the tail panel 44. Thereby, the tail lamp 60 having good visibility can be obtained.

Further, according to the truck 1 according to the present embodiment, as shown in FIG. 4, the tail lamp 60 and the ground roller 43 are arranged side by side vertically. As a result, the size of each of the tail lamp 60 and the ground roller 43 in the vehicle width direction can be increased as compared with the case where the tail lamp 60 and the ground roller 43 are arranged side by side. Even if the dimensions of the tail lamp 60 and the ground roller 43 in the vehicle width direction are increased, the tail lamp 60 and the ground roller 43 are unlikely to project outward in the vehicle width direction.

According to the truck 1 of the present embodiment, the dimension 43W of the ground roller 43 in the vehicle width direction is larger than the dimension 60W of the tail lamp 60 in the vehicle width direction. Since the dimension 43W of the ground roller 43 in the vehicle width direction is large, the luggage box 40 can be stably grounded on the ground during the sliding operation.

Further, according to the freight vehicle 1 according to the present embodiment, as shown in FIG. 5, the jack roller 85 is in the storage position when the vehicle is traveling, and the upper end 85t of the jack roller 85 is located above the lower end 70d of the rear bumper 70. To do. Since the jack roller 85 is arranged at a high place in this way, as compared with a freight vehicle in which the lower end of the jack roller 104 is located below the lower end of the rear bumper 105 as shown in FIG. A large height can be secured.

In the above embodiment, the tail lamp 60 is arranged below the tail panel 44. However, as described above, the position of the tail lamp 60 with respect to the tail panel 44 is not particularly limited. For example, as shown in FIG. 7, the tail lamp 60 may be fixed to the rear surface of the tail panel 44. The tail lamp 60 may be arranged behind the tail panel 44. The tail lamp 60 and the tail panel 44 may overlap each other in the front and rear.

1 Freight Vehicle 5 Hinge Shaft 10 Chassis Frame 20 Subframe 30 Chipping Frame 40 Packing Box 41 Bottom Plate of Packing Box 42 Bracket 43 Grounding Roller 44 Tail Panel 60 Tail Lamp 70 Rear Bumper 80 Jack 81 Bell Crank 85 Jack Roller 91 Stopper 92 Guide

Claims (5)

Chassis frame,
A sub-frame arranged on the chassis frame,
A chipping frame rotatably supported at the rear end of the subframe by a hinge shaft extending in the vehicle width direction;
A bottom plate, anda tail panels extending downward from the rear end of the bottom plate, a packing box which is slidably supported along the longitudinal direction of the tipping frame for the tipping frame,
A tail lamp fixed to the tail panel,
Truck equipped with. The lorry according to claim 1, wherein the tail lamp is disposed below the tail panel. A bracket extending downward from the rear end of the bottom plate of the packing box;
A ground roller rotatably supported on the lower end of the bracket,
The lorry according to claim 1, wherein the tail lamp and the ground roller are arranged side by side vertically. The lorry according to claim 3, wherein a dimension of the ground roller in the vehicle width direction is larger than a dimension of the tail lamp in the vehicle width direction. A bell crank having a first end portion and a second end portion, and a jack roller connected to the second end portion via a link mechanism, and with the sliding of the luggage box rearward, the first The end portion moves downward to rotate the jack roller downward toward the grounding position, and the first end portion moves upward to move the jack roller upward as the load box slides forward. A jack configured to rotate to a storage position above the grounding position,
A rear bumper arranged below the bell crank,
The truck according to any one of claims 1 to 4, wherein an upper end of the jack roller when the jack roller is in the storage position is located above a lower end of the rear bumper.

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