JP2008012968A - Cargo handling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cargo handling vehicle capable of retracting a rear bumper at the position which can prevent a contact with a cargo box during dumping and a contact with a loaded article discharged from the cargo box. <P>SOLUTION: The cargo handling vehicle is equipped with a vehicle body frame 1, the cargo box 2 which is mounted on the vehicle body frame 1 and can turn ready for dumping in a backward inclination, and the rear bumper 5 provided at the rear part of the vehicle body frame 1 turnably around a horizontal axis. The rear bumper 5 can be turned upward from a rear projection position projected rearward from the vehicle body frame 1 to a storage position to be in non-contact with the rear part lower end of the cargo box 2 during dumping. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cargo handling vehicle capable of placing a cargo box in a dumped state.

2. Description of the Related Art There is a cargo handling vehicle that has a body frame and a cargo box mounted on the body frame, and can be in a dumping state in which the cargo box is tilted downward on the body frame. A rear bumper is provided at the rear part of the body frame of the cargo handling vehicle, and the rear bumper protrudes rearward from the rear part of the body frame when the cargo handling vehicle travels.
Such a cargo handling vehicle can discharge the load from the rear part of the cargo box to the ground behind the vehicle by placing a cargo box loaded with a load containing stones or earth and sand in a dumped state. When the packing box is in a dumped state, it is necessary to retract the rear bumper so that the rear lower end of the packing box does not contact the rear bumper. Therefore, as shown in Patent Document 1, a rear bumper is attached to a vehicle body frame so as to be rotatable about a horizontal axis, and the rear bumper is rotated downward to be retracted.

Japanese Patent Publication No.59-19856 (Figs. 9 and 10)

In Patent Document 1, since the rear bumper is rotated downward when dumping the cargo box, the rear bumper is close to the ground. For this reason, if the load is discharged from the rear of the packing box to the ground behind the vehicle, the load (stones or earth and sand) may bounce off the ground and collide with the rear bumper, damaging the rear bumper or attaching to the rear bumper. There is.
Accordingly, the present invention has been made in view of the above problems, and the rear bumper is retracted to a position where contact with the packing box during dumping and contact with the load discharged from the packing box can be prevented. An object of the present invention is to provide a cargo handling vehicle.

  In order to achieve the above object, a cargo handling vehicle of the present invention includes a body frame, a cargo box mounted on the body frame and capable of being dumped downward, and a rear portion of the body frame around a horizontal axis. A rear bumper that is pivotably provided and is capable of rotating upward from a rear projecting position projecting rearward from the body frame to a retracted position that is not in contact with the lower rear end of the packing box during dumping. is there.

  According to this configuration, when the packing box is brought into the dumped state, the rear bumper is set to the storage position, thereby preventing the rear lower end of the packing box from contacting the rear bumper. Furthermore, since the rear bumper at the rearward protruding position is rotated upward and moved to the retracted position, the rear bumper at the retracted position is more distant from the ground than in the past. For this reason, even if the load discharged to the ground from the rear of the dumped packing box bounces off the ground, the load can be prevented from colliding with the rear bumper. Can be prevented.

Further, in the cargo handling vehicle, a lamp provided at a rear portion of the vehicle body frame and having a pointing surface facing rearward, and a protection that rotates integrally with the rear bumper and covers the pointing surface of the lamp at the retracted position of the rear bumper. It is preferable to further include a protection member that is in a non-protection position that is located at a position and is separated from the indication surface of the lamp at the rear projecting position of the rear bumper so that the indication surface can be viewed from the rear.
According to this, when the packing box is brought into the dumping state, the protection member rotates integrally with the rear bumper by turning the rear bumper to the retracted position, and becomes a protection position that covers the indication surface of the lamp. Thereby, it is possible to prevent the load discharged from the packing box from hitting the indication surface of the lamp. Further, by rotating the rear bumper to the rear projecting position, the protective member becomes an unprotected position, and the protective member does not interfere with visual recognition from the rear of the lamp when the cargo handling vehicle is traveling.
Thus, by providing the protective member integrally with the rotating rear bumper, a structure for switching the protective member between the protected position and the non-protected position can be obtained, and a separate mechanism for rotating the protective member is not required. This simplifies the structure.

  According to the cargo handling vehicle of the present invention, by setting the rear bumper to the retracted position, in the rear bumper, contact with the packing box being dumped and collision of the load discharged from the packing box and bounced off the ground are prevented. Can do. Therefore, it is possible to prevent the rear bumper from being damaged or the load from being attached to the rear bumper.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing an embodiment of a cargo handling vehicle according to the present invention. 2 and 3 are side views for explaining the function of the cargo handling vehicle. The cargo handling vehicle may be in a dumping state (FIG. 2) in which a body frame 1, a cargo box 2 mounted on the body frame 1, and the cargo box 2 are tilted backward on the body frame 1. A cargo handling device 3 is provided for loading and unloading the cargo box 2 between the body frame 1 and the ground (FIG. 3).

  The cargo handling device 3 includes a dump arm 11 having a base end portion rotatably attached to the rear portion of the vehicle body frame 1, and a cargo handling arm 12 having a base end portion rotatably attached to the tip end side of the dump arm 11. A telescopic actuator (hydraulic cylinder) 13 having one end portion rotatably attached to the middle portion of the cargo handling arm 12 and the other end portion rotatably attached to the front side portion of the vehicle body frame 1 is provided. The cargo handling arm 12 includes a hook arm 12a having a hook 14 attached to the tip thereof, and a lift arm 12b provided so that the hook arm 12a can be advanced and retracted. The engaging pin 15 provided on the front wall of the packing box 2 is engaged with the hook 14 to bring the packing box 2 into a dumped posture (FIG. 2) or to load and unload the packing box 2. (Fig. 3).

  More specifically, when the telescopic actuator 13 is extended in a state where the rotation of the arms 11 and 12 is restricted by a securing means (not shown) provided between the dump arm 11 and the cargo handling arm 12. The cargo box 2 in which the engagement pin 15 is engaged with the hook 14 of the cargo handling arm 12 is in a dumped state inclined downward (FIG. 2). Further, the hook arm 12a is moved horizontally with respect to the lift arm 12b to the rear of the vehicle, and the telescopic actuator 13 is extended in a state where the dumping arm 11 and the cargo handling arm 12 can be rotated by the lashing means. Then, the cargo box 2 having the engagement pins 15 engaged with the hooks 14 of the cargo handling arm 12 can be lowered to the ground (FIG. 3).

  4 to 8 are views showing a first embodiment of the main part of the present invention. 4 and 6 are views of the vehicle body frame 1 as viewed from the rear, and FIGS. 5 and 7 are side views of the rear portion of the vehicle body frame 1. FIG. 8 is a perspective view of the rear portion of the vehicle body frame 1. At the left and right positions of the rear part of the body frame 1, a lamp 4 having a pointing surface 4a facing rearward is provided. The lamp 4 includes a direction indicator lamp, a brake lamp, a stop lamp, and the like, and a support member 16 extending from the upper and lower members 17 at the rear of the vehicle body frame 1 to the outside in the vehicle width direction (outside in the left and right directions). It is fixed to. Thereby, the indication surface 4a of the lamp 4 can be visually recognized from the rear of the cargo handling vehicle. The indication surface 4a of the lamp 4 is formed by a cover member made of resin or glass.

  Further, a rear bumper 5 is provided at the rear portion of the vehicle body frame 1. The rear bumper 5 has a main body portion 5a made of steel or the like having a length extending over substantially the entire length in the vehicle width direction, and two left and right arm portions 5b fixed to the main body portion 5a and connected to the vehicle body frame 1. ing. The arm portion 5b is made of steel mold, the longitudinal direction is orthogonal to the main body portion 5a, one end portion of the arm portion 5b is fixed to the main body portion 5a, and the plate-like fixing member 19 is fixed to the other end portion. The rear bumper 5 is attached to a position near the lower end portion of the upper and lower members 17 of the vehicle body frame 1 by this fixing member 19 so as to be rotatable about a horizontal axis.

  As a result, the rear bumper 5 has a rear protruding position protruding rearward from the rear end portion of the vehicle body frame 1 shown in FIGS. 4 and 5, and a storage position stored on the vehicle body frame 1 side shown in FIGS. 6 and 7. It becomes possible to rotate between the two. In other words, the rear bumper 5 is rotated upward (upward) from the rear protruding position by about 90 ° to the storage position, and the main body portion 5a of the rear bumper 5 in the storage position is located in front of the vehicle rather than being in the rear protruding position. And it will be located above. In this retracted position, the rear bumper 5 is in a standing posture along the rear surface of the vehicle body frame 1, the arm portion 5 b of the rear bumper 5 is parallel to the upper and lower members 17 of the vehicle body frame 1, and the main body portion 5 a of the rear bumper 5 is 1 is close to the support member 16. In this storage position, the rear bumper 5 is in a position where it does not come into contact with the lower end of the rear part of the cargo box 2 during dumping (during a backward tilting operation). It should be noted that the rear bumper 5 in the storage position only needs to be in a state in which the cargo box 2 is not in contact with the lower end of the rear portion of the cargo box 2 at least during the dumping operation, and is not contacted even in the dumping state that is the most backwardly inclined state. It may be present or it may be in a contact state in a dumped state. When the rear bumper 5 in the retracted position comes into contact with the lower end of the rear portion of the cargo box 2 in a dumped state, it is preferable to provide a cushion rubber as a cushioning material at a contact portion of the rear bumper 5 with the cargo box 2.

  A mounting member 18 extends from the upper and lower members 17 toward the front of the vehicle, and a body end portion of a telescopic actuator 6 (driving means) made of a hydraulic cylinder is rotatably attached to a distal end portion of the mounting member 18. Yes. As will be described in detail later, the rear bumper 5 can be rotationally driven to the rear protruding position and the retracted position by the expansion / contraction operation of the expansion / contraction actuator 6.

  The cargo handling vehicle further includes a jack 8 at the rear portion of the vehicle body frame 1. The jack 8 has a pair of left and right arm portions 8a rotatably attached to a position near the lower end portion of the upper and lower members 17, and a roller 8b rotatably attached to the distal end portion of the arm portion 8a. is doing. The jack 8 hangs down from the vehicle body frame 1 (projects downward), and the roller 8b approaches the ground (FIG. 7). The jack 8 rotates approximately 90 ° forward of the vehicle and moves upward from the lower projection position. 8b can rotate between the storage position (FIG. 5) withdrawn from the ground.

  Further, an interlocking mechanism 9 that interlinks the rotation of the jack 8 and the rotation of the rear bumper 5 is interposed between the jack 8 and the rear bumper 5, and the interlocking mechanism 9 is jacked when the rear bumper 5 is in the retracted position. 8 is set to the lower protruding position (the state shown in FIGS. 6 and 7), and the rear bumper 5 is set to the retracted position at the rear protruding position (the state shown in FIGS. 4 and 5). The interlocking mechanism 9 shown in the figure has a linear arm member 9a, and one end portion of the arm member 9a is rotatably attached to a fixing member 19 fixed to the end portion of the rear bumper 5. Is attached to the arm portion 8a of the jack 8 in a freely rotatable manner.

  And the rod front-end | tip part of the said expansion-contraction actuator 6 is attached to the middle part of the arm part 8a of the jack 8 so that rotation is possible. The rear bumper 5 and the jack 8 can be rotated and driven by the expansion / contraction operation of the expansion / contraction actuator 6, and the rear bumper 5 is held in the retracted position and the jack 8 is in the downward projecting position with the expansion / contraction actuator 6 extended. In a state where the telescopic actuator 6 is held, the rear bumper 5 is held at the rear protruding position and the jack 8 is held at the storage position. Further, the rotation direction of the rear bumper 5 and the rotation direction of the jack 8 are the same direction (counterclockwise direction in FIGS. 5 and 7).

  The rear bumper 5 in the rearward projecting position is in a posture that projects horizontally from the upper and lower members 17 of the body frame 1 to the rear of the vehicle, and the jack 8 in the storage position projects horizontally from the upper and lower members 17 to the front of the vehicle. The rear bumper 5 and the jack 8 at these positions are in a substantially straight arrangement in the vehicle front-rear direction. As a result, as shown in FIG. 5, the rear bumper 5 and the jack 8 are at the lowermost part in the rear part of the vehicle body frame 1, and the lowermost parts are arranged horizontally and in a straight line. The rear ground clearance can be increased.

The jack 8 held in the lower protruding position can suppress the lowering of the vehicle body during the loading operation. Specifically, when loading work for loading / unloading a load onto / from the packing box 2, the jack 8 can be set to a lower protruding position so that the jack 8 can suppress the lowering of the vehicle body, and the loading of the load can be suppressed. Unloading work is safe. Alternatively, when the cargo box 2 is loaded and unloaded between the vehicle body frame 1 and the ground, the lowering of the vehicle body can be suppressed by setting the jack 8 to the lower protruding position. Loading and unloading work is safe. Since the jack 8 and the rear bumper 5 can be interlocked by the interlocking mechanism 9, the driving means (extensible actuator 6) can be used for both the jack and the rear bumper, and the structure can be simplified.
The interlocking mechanism 9 may be in other forms. For example, the interlocking mechanism 9 may be configured by the fixing member 19 on the rear bumper 5 side and the arm portion 8a of the jack 8 itself. And the arm portion 8a may be integrated (not shown), and may be rotatably attached to the vehicle body frame 1 and driven by the telescopic actuator 6.

  As a modification, the body end portion of the telescopic actuator 6 as the driving means is rotatably attached to the tip end portion of the mounting member 18 on the vehicle body frame 1 side, although not shown, the rod tip portion is the rear bumper 5. It is good also as a structure attached to. In this case, the rear bumper 5 may be rotationally driven to the rear protruding position and the retracted position by the expansion / contraction operation of the expansion / contraction actuator 6, and the rotation of the jack 8 may be interlocked by the arm member 9a (interlocking mechanism 9). Note that the attachment portion between the telescopic actuator 6 and the rear bumper 5 may be the fixing member 19 fixed to the rear bumper 5.

  The cargo handling vehicle further includes a protective member 7 that can cover and protect the indication surface 4a of the lamp 4. The protective member 7 has a lattice shape composed of a rectangular frame member and a plurality of bar members, and the lattice-shaped surface serves as the protective surface 7a. The protective member 7 is fixed to the left and right rear surfaces of the main body portion 5a of the rear bumper 5, and the protective surface 7a is fixed to be a surface orthogonal to the front surface (back surface) of the main body portion of the rear bumper 5. Of the main body portion 5a of the rear bumper 5 at the rear protruding position, the surface facing the rear of the vehicle is the surface of the rear bumper 5, and the opposite surface (the surface facing the front of the vehicle) is the rear surface of the rear bumper 5.

  As a result, the protective member 7 is fixed to the rear bumper 5 so that it can rotate integrally with the rear bumper 5. Further, the protective surface 7a of the protective member 7 has the same outer peripheral contour shape as the indication surfaces 4a of the left and right lamps 4, specifically the whole indication surface 4a of the lamp body composed of a plurality of (three) lamps 4. The outer peripheral contour shape is larger than that of all the indicating surfaces 4a.

In the state where the rear bumper 5 is set to the retracted position by the extension operation of the telescopic actuator 6 (FIGS. 6 and 7), the left and right protection members 7 fixed to the rear bumper 5 are respectively indicated on the indication surfaces of the left and right lamps 4. 4a and 4b, the left and right protection members 7 are separated from the indication surfaces 4a of the left and right lamps 4 in the state where the rear bumper 5 is in the rear projecting position. It becomes a non-protection position which makes 4a visible from back.
That is, when the rear bumper 5 is in the retracted position, the main body portion 5a of the rear bumper 5 and the support member 16 of the vehicle body frame 1 are in an adjacent parallel state, and the protective member 7 fixed to the main body portion 5a of the rear bumper 5 is the support member. It is possible to cover the indicating surface 4a at a position close to the rear of the indicating surface 4a of the lamp 4 fixed to 16.
Further, the rear bumper 5 is in a rear projecting position, the main body portion 5a of the rear bumper 5 is in a lower position in the vertical direction than the support member 16, and the protective member 7 fixed to the main body portion 5a of the rear bumper 5 is attached to the indication surface of the lamp 4 The position is lower in the vertical direction than 4a and does not exist behind the indicating surface 4a, and the indicating surface 4a is opened.

As shown in FIGS. 5, 7 and 8, the protection member 7 is in the protection position, and the protection surface 7 a is in a vertical posture and covers the indication surface 4 a in the vicinity of the indication surface 4 a of the lamp 4. be able to. Further, the protection member 7 is in the non-protection position, and the protection surface 7a is in a horizontal posture. That is, the protection surface 7a of the protection member 7 is an upward horizontal surface at the non-protection position. As a result, as shown in FIG. 8, with the rear bumper 5 in the rear protruding position, the protective surface 7a of the protective member 7 is in a horizontal posture, and this protective member 7 is used as a work platform (step) for footrest. Can be used.
Therefore, in the maintenance of the cargo handling vehicle, for example, when refueling a roller portion (not shown) on the vehicle body frame 1 or the like, the operator does not prepare another work table, and the worker can Can be climbed, and the work becomes easier.

  FIG. 9 is a diagram for explaining a second embodiment of the main part of the present invention, and is a schematic view showing the rear part of the vehicle body frame 1. Similar to the above-described embodiment, this cargo handling vehicle includes a vehicle body frame 1, a cargo box (not shown) that can be in a dumped state, a lamp 4 having a pointing surface 4a facing rearward, and a rear protruding position ( 9A) and a rear bumper 5 that can rotate between the storage position (FIG. 9B), an extendable actuator 6 that rotates the rear bumper 5, and a protective member 7 fixed to the rear bumper 5. It has. The protective member 7 is rotated integrally with the rear bumper 5 so that the rear bumper 5 is in a protective position that covers the indication surface 4a of the lamp 4 in the retracted position, and the rear bumper 5 is separated from the indication surface 4a of the lamp 4 in the rearward protruding position. It becomes a non-protection position which makes the said indicating surface 4a visible from back.

  In this embodiment, the telescopic actuator 6 is attached between an attachment member 18 in the vehicle body frame 1 and a fixing member 19 fixed to the rear bumper 5. That is, the telescopic actuator 6 is connected to the rear bumper 5 and directly rotates the rear bumper 5. In the embodiment described above, the telescopic actuator 6 rotates the jack 8, and the rear bumper 5 is indirectly rotated through the jack 8 and the interlocking mechanism 9. In the embodiment shown in FIG. 5 and the jack (not shown) are not interlocked, and only the rear bumper 5 is rotated alone.

FIG. 10 is a view for explaining a third embodiment of the main part of the present invention, which is a modified example of the rear bumper 5 and the protective member 7. FIG. 10A is a perspective view showing the rear bumper 5 and the protective member 7, and FIG. 10B is a diagram for explaining these operations.
In this embodiment, a part of each of the left and right sides of the rear bumper 5 is used as the protective member 7. That is, the rear bumper 5 and the protective member 7 are integrally formed. Specifically, in the state where the rear bumper 5 shown in FIG. 10A is in the rear protruding position, the upper portion of the main body portion 5a of the rear bumper 5 is used as the protective member 7, and the upper surface thereof is used as the protective surface 7a. Then, as shown in FIG. 10 (b), the protective surface 7 a is brought close to the indicating surface 4 a of the lamp 4 by rotating the rear bumper 5 upward by a telescopic actuator (not shown) similar to the above. Then, the indication surface 4a can be covered.

  In this embodiment, the dimension (vehicle front-rear direction dimension) B1 of the protective surface 7a that is the upper surface of the main body part 5a of the rear bumper 5 is made larger than the thickness dimension b1 in the front and back direction at the lower part of the main body part 5a of the rear bumper 5. (B1> b1). As a result, the protective member 7 can be widened and the lamp 4 can be covered without being affected by the front-back dimension b1 of the main body 5a of the rear bumper 5.

FIG. 11 is a view for explaining a fourth embodiment of the main part of the present invention, which is a modification of the third embodiment. FIG. 11A is a perspective view showing the rear bumper 5 and the protective member 7, and FIG. 11B is a diagram for explaining these operations.
Also in this embodiment, as in the third embodiment, the rear bumper 5 and the protective member 7 are integrally formed. Specifically, in the state where the rear bumper 5 shown in FIG. 11A is in the rear protruding position, the upper portion of the main body portion 5a of the rear bumper 5 is used as the protective member 7, and the upper surface protective surface 7a thereof. Then, as shown in FIG. 11 (b), the protective surface 7a is brought close to the indicating surface 4a of the lamp 4 by rotating the rear bumper 5 upward by a telescopic actuator (not shown) similar to the above. Then, the indication surface 4a can be covered.

  In this embodiment, the cross-sectional outline shape of the rear bumper 5 partially including the protective member 7 is rectangular, and the dimension (vehicle longitudinal dimension) B2 of the protective surface 7a, which is the upper surface of the main body 5a of the rear bumper 5, is set. The thickness dimension b2 in the front and back direction at the lower part of the main body 5a of the rear bumper 5 is the same (B2 = b2). Thereby, the shape of the rear bumper 5 with a part of the protective member 7 is simplified, and the manufacture thereof becomes easy.

FIG. 12 is a view for explaining a fifth embodiment of the main part of the present invention, which is a modification of the third embodiment (FIG. 10). FIG. 12A is a perspective view showing the rear bumper 5 and the protective member 7, and FIG. 12B is a diagram for explaining these operations.
Also in this embodiment, the rear bumper 5 and the protective member 7 are integrally formed, as in the third embodiment. Specifically, as shown in FIG. 12A, in the state where the rear bumper 5 is in the rear protruding position, the upper part of the main body part 5a of the rear bumper 5 is used as the protective member 7, and the upper surface thereof is used as the protective surface 7a. . Then, as shown in FIG. 12 (b), the protective surface 7 a is brought close to the indicating surface 4 a of the lamp 4 by rotating the rear bumper 5 upward by an expansion / contraction actuator (not shown) similar to the above. Then, the indication surface 4a can be covered.

In this embodiment, only the respective parts on both sides in the vehicle width direction (both left and right sides) of the main body portion 5a of the rear bumper 5 are set to have the dimensions B3 (the vehicle front-rear direction dimensions) B3 of the rear bumper 5 below the main body portion 5a. Is larger than the thickness dimension b3 in the front and back direction (B3> b3). Thereby, since the protection member 7 is formed only about the part corresponding to the lamp 4 in the main body 5a of the rear bumper 5, the weight of the rear bumper 5 can be reduced and the weight can be reduced.
In the embodiment shown in FIGS. 10 to 12, the jack 8 and the rear bumper 5 may be rotated in conjunction with each other as in the first embodiment (see FIG. 5), or As in the second embodiment (FIG. 9), the rear bumper 5 may be independently rotated.

FIG. 13 is a view for explaining the sixth embodiment of the main part of the present invention, and is a perspective view showing the rear part of the vehicle body frame 1. This embodiment is a modification of the first embodiment (see FIG. 8), the fixing position of the protective member 7 with respect to the rear bumper 5 is different, and the other configurations are the same as those of the first embodiment. The protective member 7 in FIG. 13 is fixed to the pair of left and right arms 5 b of the rear bumper 5. Specifically, the connecting member 20 is linearly extended from the side surface of the arm portion 5b to the outside in the vehicle width direction, and the protective member 7 is provided at the distal end portion of the connecting member 20.
Then, by the operation of the same expansion and contraction actuator (not shown) as described above, the protection member 7 is brought into a protection position that covers the indication surface 4a of the lamp 4 by setting the rear bumper 5 to the retracted position, and the rear bumper 5 protrudes backward. By setting the position, it is possible to be a non-protected position that allows the indication surface 4a to be visually recognized from the rear side away from the indication surface 4a of the lamp 4.

  According to each of the above embodiments, the rear bumper 5 can be made to function as a shock absorber in the rear portion of the vehicle by setting the rear bumper 5 to the rear protruding position. And as shown in FIG. 2, when the packing box 2 is made into a dumping state, the rear bumper 5 can be prevented from contacting the rear bumper 5 by setting the rear bumper 5 to the storage position. Further, as shown in FIG. 3, when the cargo handling device 3 loads and unloads the cargo box 2 between the body frame 1 and the ground, the rear bumper 5 is set to the retracted position, so that the cargo box 2 is moved to the rear bumper. Contact with 5 can be prevented.

Further, since the rear bumper 5 at the rearward protruding position can be rotated upward to be the stowed storage position, the rear bumper 5 at the storage position is more distant from the ground than in the prior art. For this reason, even if the load discharged to the ground from the rear portion of the packing box 2 in the dumped state rebounds on the ground, the load can be prevented from colliding with the rear bumper 5 (particularly the main body portion 5a), and damage to the rear bumper 5 can be prevented. In addition, the load can be prevented from adhering to the rear bumper 5. In addition, since the rear bumper 5 is rotated upward to be in the stowed position of the standing posture along the rear surface of the vehicle body frame 1 (upper and lower member 17), the rear bumper 5 is located between the rear surface and the rear lower end of the cargo box 2 in the dump. The rear bumper 5 can be stored using an empty space in the vehicle front-rear direction (see FIG. 2). That is, a space for storing the rear bumper 5 in the vehicle body frame 1 is not required, and the vehicle body frame 1 can be reduced in size at the rear portion.
As a conventional cargo handling vehicle, although not shown, the rear bumper that protrudes rearward from the rear part of the vehicle frame is slid forward and retracted so that the rear lower end of the cargo box during dumping does not contact the rear bumper. Can be considered. However, in this case, a large stroke is required to slide the rear bumper into the vehicle body frame. For this reason, a space corresponding to this stroke is required in the vehicle body frame, and a long telescopic actuator capable of generating this large stroke is required. That is, there is a problem that a large space is required to store the rear bumper in the vehicle body frame. However, according to the present invention, a space for storing the rear bumper 5 in the body frame 1 can be eliminated.

  When the packing box 2 is brought into a dumped state, for example, as shown in FIG. 5, the protective bumper 5 is rotated integrally with the rear bumper 5 by rotating the rear bumper 5 to the retracted position by the telescopic actuator 6. It becomes a protection position which covers 4 indication surfaces 4a. Further, as shown in FIG. 7, by rotating the rear bumper 5 to the rearward projecting position by the telescopic actuator 6, the protective member 7 becomes an unprotected position, and when the cargo handling vehicle travels, the protective member 7 is moved from the rear of the ramp. It does not get in the way of visual recognition. Thus, by providing the protective member 7 integrally with the rotating rear bumper 5, a structure for switching the protective member 7 between the protected position and the non-protected position is obtained, and another structure for rotating the protective member 7 is obtained. A mechanism can be eliminated and the structure can be simplified.

  When the packing box 2 is put in the dumping state, the rear bumper 5 is set to the storage position and the protection member 7 is set to the protection position, so that the stone discharged from the packing box 2 jumps on the ground and flies to the lamp 4 side. The protective member 7 can prevent the stone from hitting the indication surface 4a of the lamp 4, and can prevent the indication surface 4a from being damaged.

  Further, when the protection member 7 is formed in a lattice shape, even when the indication surface 4a of the lamp 4 is covered and protected by the protection member 7, the indication surface 4a can be visually recognized through the protection member 7 from the rear side. It can be expensive. The protective member 7 has a lattice shape composed of a rectangular frame member and a plurality of bar members, and stones larger than the interval (grid width) between adjacent bar members are prevented from hitting the lamp 4 by the protective member 7. be able to. On the other hand, stones smaller than the lattice width may hit the lamp 4 from between the bar materials, but such pebbles have a small mass and the speed after rebounding to the ground is low, so even if they hit the indicating surface 4a. The indicating surface 4a is not damaged. That is, the lattice shape of the protective member 7 is set to a lattice width smaller than that of a stone having a size that may damage the indication surface 4a.

  Further, according to the embodiment in which the rotation of the jack 8 and the rotation of the rear bumper 5 are linked by the linkage mechanism 9, the single telescopic actuator 6 is used for driving the rotation of the jack 8 and the rotation of the rear bumper 5. It can be used together for driving, and the structure can be simplified.

  Further, the cargo handling vehicle of the present invention is not limited to the illustrated form, and may be of other forms within the scope of the present invention, and the function of loading and unloading the cargo box 2 between the body frame 1 and the ground. The dump truck (not shown) provided with the operation device which can make the packing box 2 into the dumping state inclined downward is provided.

It is a side view which shows one Embodiment of the cargo handling vehicle of this invention. It is a side view explaining the function of this cargo handling vehicle. It is a side view explaining the function of this cargo handling vehicle. It is the figure which shows 1st embodiment of a cargo handling vehicle, and is the figure which looked at the vehicle body frame in which a protection member exists in a non-protection position from back. FIG. 5 is a side view of the rear part of the vehicle body frame in FIG. 4. It is the figure which shows 1st embodiment of a cargo handling vehicle, and is the figure which looked at the vehicle body frame in which a protection member exists in a protection position from back. It is a side view in the rear part of the vehicle body frame of FIG. It is a perspective view of the rear part of a body frame It is a figure explaining 2nd embodiment of a cargo handling vehicle, and is the schematic which shows the rear part of a vehicle body frame. It is a figure explaining the principal part of 3rd embodiment of a cargo handling vehicle. It is a figure explaining the principal part of 4th embodiment of a cargo handling vehicle. It is a figure explaining the principal part of 5th embodiment of a cargo handling vehicle. It is a figure explaining 6th embodiment of a cargo handling vehicle, and is a perspective view which shows the rear part of a vehicle body frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body frame 2 Cargo box 4 Lamp 4a Indication surface 5 Rear bumper 6 Drive means (extension actuator)
7 Protection member 7a Protection surface 8 Jack 9 Interlocking mechanism

Claims (2)

Body frame,
A cargo box that is mounted on this body frame and can be dumped downward,
It is provided at the rear part of the body frame so as to be rotatable around a horizontal axis, and is rotated upward from a rear projecting position projecting rearward from the body frame to a storage position that is not in contact with the lower rear end of the cargo box during dumping. Possible rear bumper,
A cargo handling vehicle characterized by comprising: A lamp provided at a rear portion of the vehicle body frame and having a pointing surface facing rearward;
Rotates integrally with the rear bumper, becomes a protection position that covers the indication surface of the lamp at the retracted position of the rear bumper, and moves away from the indication surface of the lamp at the rearward protruding position of the rear bumper. A protective member that is an unprotected position that is visible from
The cargo handling vehicle according to claim 1, further comprising:

Images