JP5005397B2 - Vehicle gate opening and closing device - Google Patents

Description

  The present invention relates to an improvement in a gate opening / closing device that opens and closes a tailgate of a dump truck, for example.

  In Patent Document 1, the cargo box is tilted forward and downward toward the rear of the vehicle body, and the tailgate is pivoted downward from above with the upper hinge as a fulcrum to open downward, and the earth and sand are discharged (dumped) from the cargo bed. A dump truck is disclosed. The tailgate is automatically opened downward by releasing the gate opening / closing device when the cargo box is tilted.

Specifically, while fixed a pair of brackets locking pin is bridged to the lower tailgate lower, as well as fixed a guide plate having engaging grooves on the Te Rupaneru surface, said tail panel hooks Is arranged so as to protrude from the rear side of the tail panel to the front side. When the load box is not tilted on the chassis, the locking pin is engaged with the engaging groove of the guide plate, and the hook is locked with the locking pin from above to close the tailgate. While maintaining the state, when the cargo box is tilted, the hook is detached from the locking pin in conjunction with the tilting operation, and the locking pin is detached from the engaging groove of the guide plate, and the tailgate is moved upward. The hinge is pivoted upward from below using a fulcrum to open downward.
Japanese Examined Patent Publication No. 2-36409 (Page 2, Figures 1 and 2)

  By the way, the positioning of the engagement pin on the tailgate side and the engagement groove of the guide plate on the tail panel side can be performed relatively easily when the cargo box is mounted on the chassis, but the hook is attached to the rear surface of the tail panel. Since it is pivotally supported by the fixed bracket, if the fixed position of the bracket with respect to the tail panel is shifted, the positional relationship between the hook and the guide plate will be shifted, and the locking pin will be in the engaging groove of the guide plate. Even when engaged, a situation occurs in which the hook cannot be locked to the locking pin, and the closed state of the tailgate becomes unstable.

  The present invention has been made in view of the above points, and an object of the present invention is to securely lock the hook to the locking pin.

  In order to achieve the above object, the present invention is characterized in that the positional relationship between the hook and the guide plate is not changed.

More specifically, the invention is engaged with the engagement pin of the tailgate lower end engaging groove of the provided guide plates in tail panel, a hook is engaged with the locking pin of the tailgate While holding the closed state, the hook is detached from the locking pin, the locking pin is detached from the engaging groove of the guide plate, and the tailgate is pivoted upward from below with the upper hinge as a fulcrum. The following solution was taken for the gate opening and closing device of the vehicle that was opened downward.

That is, according to the first aspect of the present invention, the guide plate and the hook protrude from the rear side of the tail panel through the opening formed in the tail panel, and the hook is integrated with the guide plate on the rear side of the tail panel. and wherein the axially supported by Tei Rukoto to.

The invention of claim 2 is the invention according to claim 1, the vehicle is characterized by a dump truck to tilt forwardly downwardly toward the packing boxes in the rear of the vehicle body.

According to the invention of claim 1, the hook is integrally supported has been both positional relationship is always constant tail panel back to the guide plate and co, and without fail locked hook to the locking pin The closed state of the tailgate can be reliably maintained.

  According to the invention which concerns on Claim 2, the closed state of the tailgate of a dump truck can be hold | maintained reliably.

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

  FIG. 1 shows a dump truck 1 as a vehicle, 3 is a cab, 5 is a chassis behind the cab 3, and a cargo box 7 is mounted on the chassis 5.

  The packing box 7 includes a rectangular floor plate 9, and a protector 11 is erected at the front end of the vehicle body of the floor plate 9, and a pair of side gates 13 are erected at both ends in the vehicle width direction. Further, a tail gate 15 is erected at the rear end of the vehicle body of the floor plate 9 so as to be able to open downward. The protector 11, the side gate 13 and the tail gate 15 surround the entire outer periphery of the floor plate 9. This dump truck 1 tilts the tailgate 15 downwardly toward the rear of the vehicle body around the support shaft 16 (see FIG. 3) by the extension operation of a hoist cylinder (not shown), and opens the tailgate 15 downward. Etc. are discharged (dumped).

  As shown in FIG. 2, the tailgate 15 is pivoted downward from below with two upper hinges 17 provided at both ends in the vehicle width direction so as to open downward. Each upper hinge 17 includes a first hinge constituting member 21 fixed to both ends in the vehicle width direction of the upper edge portion of the tailgate 15 and a second hinge fixed to the rear end of the vehicle body at the upper edge portion of each side gate 13. The component member 23 and an operation handle 25 provided at the upper end of the second hinge component member 23 so as to be pivotable in the vertical direction. The first hinge constituent member 21 has a hinge pin 19 projecting outward in the vehicle width direction, and a substantially U-shape with which the hinge pin 19 is detachably engaged at the tip of the second hinge constituent member 23. The engaging groove (not shown) is formed. A substantially U-shaped engagement groove (not shown) that sandwiches the hinge pin 19 with the engagement groove of the second hinge constituting member 23 is formed at the tip of the operation handle 25. The operation handle 25 is configured to hold the hinge pin 19 in a downward rotation operation and release the hinge pin 19 in a upward rotation operation.

  The tailgate 15 is configured to be automatically opened downward by rotating from the lower side to the upper side with the upper hinge 17 as a fulcrum when the gate opening / closing device 27 is released at the time of dumping for discharging earth and sand.

As shown in FIGS. 4 and 5 in an enlarged manner, the gate opening / closing device 27 is a locking pin that is bridged by a pair of left and right brackets 29 and is fixed to the lower end of the tailgate 15 at an interval in the vehicle width direction. and 31, a guide plate 35 extending in the provided et the vertical direction so as to correspond to the locking pin 31 in the tape Rupaneru 3 3, the front from the back tail panel 33 through the rectangular opening 33a formed in the tail panel 33 in a full-click 37 that protrudes, and a actuation mechanism 39 for actuating the hook 37.

As shown in FIGS. 6 to 8 in an enlarged manner, the guide plate 35 has a substantially U-shaped engagement groove 35a formed near the lower end and a shaft hole 35b formed therethrough. Then, the guide plate 35 is inserted substantially half of the plate portion of the engaging groove 35a side from the rear tail panel 33 through the long slit-like narrow opening 33b in the vertical direction formed in the tail panel 33 Tail The panel 33 protrudes to the front side, and a substantially half plate portion on the shaft hole 35 b side protrudes to the rear side of the tail panel 33 .

A bracket 41 is fixed on the rear surface of the tail panel 33, and a base end upper portion of the hook 37 is inserted between the bracket 41 and the guide plate 35, and the guide plate 35 is repelled by the support shaft 43. The hook 37 is pivotally supported on the back side of the tail panel 33 together with the guide plate 35. This is a feature of the present invention.

  As shown in FIG. 3, the operating mechanism 39 is disposed on the back side of the floor plate 9 at both ends in the vehicle width direction at the rear end of the cargo box 7, and a pin 45 is inserted into a pin hole 37 a at the lower base end of the hook 37. A long rod 47 having one end connected thereto, a buffer cylinder 49 in which the other end of the long rod 47 is movably inserted and has a built-in spring 48, and a short rod 51 connected to the buffer cylinder 49 are provided. ing. A spring 53 is stretched between the middle portion of the long rod 47 and the bracket 41. One end of a U-shaped arm 55 is connected to the short rod 51 by a pin 57. A midway portion of the arm 55 is supported by a support plate 59 fixed to the chassis 5 with a support shaft 61, and the other end of the arm 55 is placed on the upper surface of a receiving plate 63 fixed to the chassis 5. A roller 65 received and supported in a non-tilting state is rotatably attached.

  In the dump truck 1 configured as described above, in a non-dump state in which the cargo box 7 is not tilted, the roller 65 of the gate opening / closing device 27 (operation mechanism 39) is pressed against the upper surface of the receiving plate 63 and the spring force (tensile force of the spring 53). ). Therefore, the locking pin 31 is engaged with the engaging groove 35a of the guide plate 35, and the hook 37 is locked to the locking pin 31 from above to hold the closed state of the tailgate 15. On the other hand, at the time of dumping in which the packing box 7 is tilted, the roller 65 is separated from the upper surface of the receiving plate 63 by the spring force (tensile force) of the spring 53 as the packing box 7 is tilted. While being disengaged from the stop pin 31, the locking pin 31 is disengaged from the engaging groove 35 a of the guide plate 35, and the tailgate 15 is pivoted upward from below with the upper hinge 17 as a fulcrum to be opened downward.

Thus, in this embodiment, since the integrally supported a hook 37 on the guide plate 35 and co behind the tail panel 33, it can be always constant positional relationship between the hook 37 The closed state of the tailgate 15 can be reliably held by reliably locking the locking pin 31.

In this embodiment, the dump truck 1 that opens the tailgate 15 downward by tilting the cargo box 7 forward and backward toward the rear of the vehicle body is illustrated. In addition to the dump truck 1, the present invention can also be applied to a gate opening / closing device of a container handling vehicle .

  Further, in this embodiment, the gate opening / closing device 27 is of the automatic opening / closing type, but it may be of a type that is manually opened / closed.

  The present invention is useful for, for example, a gate opening and closing device that opens and closes a tailgate of a dump truck.

It is a perspective view of a dump truck in a state where the tailgate is opened downward at the time of dumping in which the packing box is tilted. It is the figure which looked at the whole tailgate from the vehicle body back. It is a side view of a gate opening / closing device. It is the perspective view which expanded the A section of FIG. 2 and was seen from the vehicle body back right side. It is the perspective view which expanded the A section of FIG. 2 and was seen from the vehicle body rear left side. It is sectional drawing equivalent to the VI-VI line of FIG. FIG. 7 is a perspective view corresponding to FIG. 6. It is sectional drawing in the VIII-VIII line of FIG.

1 Dump truck (vehicle)
7 packing box 15 tailgate 17 upper hinge 27 gating device 31 the locking pin 33 Terupane Le
33a opening
33b opening 35 guide plate 35a engagement groove 37 hook

Claims (2)

The locking pin at the lower end of the tailgate is engaged with the engagement groove of the guide plate provided on the tail panel, and the hook is locked with the locking pin to keep the tailgate closed, while the hook The gate of the vehicle is opened and closed by releasing the locking pin from the engagement groove of the guide plate and rotating the tailgate upward from below with the upper hinge as a fulcrum. A device,
The guide plate and hook protrude from the rear side of the tail panel to the front side through an opening formed in the tail panel,
The hook, the gate opening and closing device for a vehicle according to claim Tei Rukoto integrally supported by the tail panel back together with the guide plate. The gate opening and closing device for a vehicle according to claim 1,
A gate opening and closing device for a vehicle, wherein the vehicle is a dump truck that tilts a cargo box forward and downward toward the rear of the vehicle body.

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