JPS5925692B2 - Automatic opening/closing device for tri-turn dump truck cargo box opening - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic opening/closing device for lifting a cargo box of a tri-turn dump truck.

The present invention automatically releases the fanning in the rolling direction without any operation when the cargo box rolls in each direction, and securely secures the fanning when the cargo box is not rolling. The purpose of this device is to provide a hinge pin 1 at both ends of a cross beam 6 fixed to the front of the vehicle body frame 3 and a horizontal beam 4 pivoted to the rear, and attach the hinge pin γ to the cargo box 1. The provided locking post 8 is engaged, a locking piece 9 is rotatably provided on the locking post 8, and the locking post 8 and the hinge pin 1 are pivotally connected between the locking piece 9 and the cargo box 1. A hook 10 for lashing or releasing is provided, an arm rod 12 is pivotally connected to a bearing 11 provided on the lower surface of the box body 1, and a guide roller 13 provided at the lower end of the arm rod 12 can be engaged with and detached from the protrusion of the hinge pin γ. Bell cranks 23° 23, 15, 15 are rotatably provided on the front left and right sides and rear left and right sides of the cargo box 1, respectively, and the front bell cranks 23.23 have latches 19.19 via rods 1γ and 17, respectively. A hook 18.18 is provided for engaging and disengaging the rear bell crank IS, ist rod 11.17 respectively.
The hook 18.18 is connected and released through the latch 19.19t.
The left bell cranks 23.15 are connected to each other and the right bell cranks 23.15 are connected to each other by a branching iron 22.2.
2, and further connect the rear left bell crank 15 and right arm rod 12, and the rear right bell crank 15 and left arm rod 12 with rods 14 and 14, respectively, to create left and right fan 2.
A bell crank 24 is rotatably provided in front of the cargo platform 1, and both ends of the bell crank 24 are connected to arm rods provided on the left and right sides of the front via rods 14 and 14, respectively. 12, 12, and the other end G connects to the loading platform 1 via the rod 25, arm rods 27, 29, and interlocking shaft 26.
This automatic opening/closing device for a cargo box fan for a three-turn dump truck is characterized in that a hook 18, 18 that engages and disengages from a rear latch 19°19 is provided to form an opening/closing mechanism for a rear fan 2.

Hereinafter, the present invention will be explained in detail based on the drawings.

1 is a loading box of a dump truck, 2 is a fan which is pivoted at the upper end of the loading box 1 in three directions, 3 is a vehicle body frame, and 4 is rotatably mounted on the upper rear surface of the vehicle body frame 3 via a bearing 5. The horizontal beams 6 are fixed to the upper front surface of the vehicle body frame 3, the hinge pins T are provided at both ends of the horizontal beams 4 and 6, and the loading box 1 is pivoted to the hinge pin T. A locking post provided on the lower surface, 9 is rotatably provided on the locking post 8, and a locking piece for locking and releasing the pivotal connection between the locking post 8 and the hinge pin T; 10 is a locking piece for locking the locking piece 9; It is a key piece that maintains or releases the lashing state with respect to the stopper post 8,
It goes in and out between the upper surface of the locking piece 9 and the lower surface of the packing box 1, and has a wedge-shaped tip.

Bearings 11 are arranged in parallel to the valley locking posts 8 on the lower surface of the cargo box 1, and arm rods 12 are rotatably attached to the bearings 11.

The shaft attachment portions of the bearing 11 and the arm rod 12 are both configured to be located outward from the hinge pin T when the cargo box 1 is not rolling, and a guide roller 13 is provided at the lower end of the arm rod 12. , a rod 14 is rotatably attached to the upper end.

Note that the hinge pin T located on the right side of the vehicle body has a rearward protrusion, and the left hinge pin 1 has a forward protrusion, and the guide roller 13 engages with and disengages from the protrusion of each hinge pin γ.

The rod 14 that is pivoted on the upper end of the arm rod 12 is attached to one end of a bell crank 15 that extends left and right and is rotatably provided on the bottom surface of the cargo box 1. Furthermore, a rod 11 having a buffer spring cylinder 16 in the middle is pivoted to the same end of the bell crank 15, and the other end of this rod 11 is pivoted to the inner end of the hook 18.

A pair of hooks 18 are provided on both sides of the rear of the cargo box 1, as well as on both sides of the front and the rear, and can be freely hooked onto and removed from latches 19 provided on both sides of the cargo box 1 and at the bottom of the fan 2 at the rear. It is rotatably attached to a bearing 20 provided at the bottom of the.

Further, one end of a return spring 21 is connected to the middle of the rod 1T, and the other end is connected to a bearing 20.

One end of a branching rod 22 is pivotally attached to the other end of the bell crank 15, and the lower part of the cargo box 1 is extended forward, and the branching rod 2
The other ends of the rods 2 and 2 are each pivoted to one end of the front bell crank 23, and the other end of the bell crank 23 is equipped with a rod 1T having a buffer spring cylinder 16 in the middle, as in the case of the rear both sides of the cargo box 1 described above. One end of the rod 11 is pivoted, the other end of the rod 11 is connected to the inner end of the hook 18, and a return spring 21 connected to the bearing 20 of the hook 18 is connected in the middle of the rod 1γ.

The bell crank 23 is rotatably provided at the lower part of the cargo box 1, and together with the bell crank 15, the displacement of the hook 18 caused by the engagement and disengagement between the guide roller 13 and the hinge pin T and the action of the return spring 21 is caused by the movement of the load. They are provided so that they are the same on each side of the box 1.

Next, the rod 14, which has one end pivoted to the upper end of the arm rod 12 on both sides of the front part of the cargo box 1, has the other end at the front and rear ends of a bell crank 24, which is rotatably provided at the center of the front part of the cargo box 1. One end of a rod 25 extending rearward is pivotally attached to the end projecting from the center of the bell crank 24 at right angles to the upper and lower ends, and the other end of the rod 25 is attached to the center of the interlocking shaft 26. It is pivoted to the arm rod 2T fixed to the.

The interlocking shaft 26 is arranged to be perpendicular to the rod 25, is rotatably mounted on a bearing 28 provided on the lower surface of the cargo box 1, and arm rods 29 are fixedly installed at both ends of the interlocking shaft 26, respectively.

A rod 1T having a buffer spring cylinder 16 in the middle is pivotally attached to this arm rod 29, and the other end of the rod 1T is pivoted to the inner end of the hook 18 described above, and the rod 1T has a bearing in the middle of the rod 11 and the hook 18. A return spring 21 is interposed between the spring 20 and the spring 20 as described above.

Since this embodiment is constructed as described above, when the cargo box 1 is rolled to the right, the right side fan 2 is activated, when it is rolled to the left, the left side fan 2 is activated, and when it is rolled backward, the rear fan is activated. 2 is automatically released, and the slope of the cargo box 1 is wide open, allowing the cargo to be unloaded in each direction.

Hereinafter, this will be explained in detail. First, the right side fan 2 of the cargo box 1 is brought into the released state as follows.

First, when the cargo box 1 rolls to the right, the left locking piece 9
The key piece 10 that was inserted between the
, and rotate the locking piece 9 in the release direction to release the locking post 8.
When the hinge pin T is unfastened and a push-up device (not shown) is operated, the cargo box 1 rolls to the right.

At this time, the guide roller 13 of the left arm rod 12, which was held in the protrusion of the hinge pin 1, separates from the protrusion of the hinge pin T as the cargo box 1 tilts to the right, and the arm rod 12 is free to rotate. becomes.

The upper end of the arm rod 12 is connected to the hook 18 on the rear right side of the cargo box 1 via the rod 14 and the rod IT, and is connected to the hook 18 on the rear right side of the cargo box 1 via the bell crank 15, the branch rod 22, the bell crank 23, and the rod 11. It is connected to the hook 18 on the front right side, and a return spring 21 is interposed between the bearing 20 of the hook 18 and the middle of the rod 1γ.
As described above, the rod 1T on which the arm rod 12 is rotatable is moved to the right, and the hook 18 is separated from the latch 19 of the fan 2, thereby opening the fan 2.

As described above, when the cargo box 1 rolls to the right, the right fan 2 becomes open, and when it rolls to the left, the left fan 2 moves in exactly the same manner, but in the opposite direction. Since this is an open state, a description thereof will be omitted.

Next, when the cargo box 1 rolls backward, when the lock piece 10 in front of the cargo box 1 is removed and the push-up device is activated, the cargo box 1 rolls backward in the same manner as described above.

At this time, the front arm rod 12 becomes rotatable due to the guide roller 13 separating from the protrusion of the hinge pin T.
This arm rod 12 is connected to the rear hook 18 via the rods 14, 25, the arm rod 21, the interlocking shaft 26, and the arm rod 29, and is connected between the bearing 20 of the hook 18 and the middle of the rod 1T. Since the return spring 21 is interposed,
The rod 1γ moves backward and pushes the hook 18 to release the latch 1 of 2.
9 force) and set the fan 2 in the open state.

In addition, when rolling the cargo box 1 from side to side, the left and right lock pieces 10, including those on the front left and right sides, must be pulled out from between the bottom surface of the cargo box 1 and the locking piece 9, as described above. but,
Rods 1 are attached to the upper ends of the left and right arm levers 12 in front of the cargo box 1, respectively.
4 are connected, and each rod 14 is connected to a bell crank 2.
Since the arm rod 12 is connected to the front and rear ends of the lock 4, the arm rod 12 cannot be freely rotated unless both the left and right front lock pieces 10 are pulled out at the same time. It won't happen.

Finally, when the cargo box 1 is returned to the non-rolling state from the left-right or rearward transfer state, the cargo box 1 becomes the non-tilting state, the hinge pin γ is pivotally connected to the locking post 8, the locking piece 9 and the lock piece 10 The pivot joint is secured.

At this time, the guide roller 13 of the arm rod 12 engages with the protrusion of the hinge pin T, and the arm rod 12 rotates in a direction that pulls the return spring 21, causing the hook 1B to engage with the latch 19 of the fan 2, and the cargo box 1 becomes empty. In a tilted state (in this case, the arm rod 12 stops rotating).

Therefore, as can be understood from the description of the embodiments above, according to the present invention, the relocation of the cargo boxes is simply performed by operating the relocation device. It opens and closes according to the
The intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line B-B in FIG. be. 1 is a loading box, 2 is a fan, 3 is a vehicle frame, 4 is a horizontal shaft beam, 6 is a cross beam, γ is a hinge pin, 8 is a locking column, 9 is a locking piece, 10 is a key piece, 12 is an arm rod, 13 is a guide roller, 14, 17.2
5 is a rod, 15, 23° 24 is a bell crank, 18 is a hook, 19 is a latch, 21 is a return spring, 22
is a branch rod, 26 is an interlocking yoke

Claims (1)

[Claims] 1 Hinge pins are provided at both ends of the cross beam fixed to the front of the vehicle body frame and the horizontal shaft beam fixed to the rear, the locking posts provided on the cargo box are engaged with these hinge pins, and the locking pieces are attached to the locking posts. A hook is rotatably provided between the locking piece and the cargo box to lock or release the locking post and the hinge pin, and the arm rod is pivotally connected to a bearing provided on the lower surface of the box. The guide roller provided at the lower end of the arm rod can be engaged with and detached from the protruding part of the hinge pin, and bell cranks are provided on the front left and right sides and rear left and right sides of the cargo box so as to be freely rotatable.
The front bell cranks each have a hook that connects to and disconnects from the latch via a rod, and the rear bell crank also has a hook that connects to and disconnects from the latch via a rod, so that the left bell cranks and the right side The bell cranks are connected to each other with branched rondos, and the bell crank on the rear left side and the arm rod on the right side, and the bell crank on the rear right side and the arm rod on the left side are connected with rods, respectively, to form an opening/closing mechanism for the left and right fan. On the other hand, a bell crank is rotatably provided in front of the loading platform, and both ends of this bell crank are connected via rods to the arm rods provided on the left and right Q in front, respectively. An automatic opening/closing device for a cargo box fan for a three-turn dump truck, characterized in that a hook is provided that engages and disengages from a latch at the rear of the cargo platform via an interlocking shaft to form an opening/closing mechanism for the rear fan.