JPS6130938B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hinge operating device for switching a hinge position in order to tilt a cargo box in each direction in a side dump truck or a three-turn dump truck.

Generally, in a side dump truck or three-turn dump truck, hinges are provided at four locations on both the front and rear sides between the cargo box and the chassis, and the hinges are composed of an engaging piece and a hook that engage with a support pin, and the support The pins are released and the cargo box is tilted in each direction. However, conventionally, the hook operating system mechanically linked two systems of operating levers.
Since the hook is actuated by selecting the operating lever, there is a risk of erroneous operation, and there is also the problem of having to provide an extra mechanism to prevent this.

The present invention has been made in view of the above points, and below, the configuration of the present invention will be explained with reference to the drawings. box 3
The hinge position is changed so that the hinge can be tilted backward and to both sides.
Connection mechanism 6 and operating means 7 for operating 5L and 5R
It is composed of.

The hinges 4L, 4R, 5L, 5R are connected to the support pins 8L, 8R, 9L, 9R provided on the cargo box 3 and the chassis 2.
Engagement pieces 10L, 10R, 11L, 1 provided in
1R, hook 12L, 12R, 13L, 13R
(lashing member) and stopper 14L, 14R, 15
It is composed of L and 15R (lashing members). At the bottom of the packing box 3, a main girder 16 is arranged in the front-rear direction, and stiffeners 17 are arranged in the left-right direction, and brackets 18L, 18 are installed at the ends of the stiffeners 17 on both sides of the front of the packing box 3.
R is fixed, and support pins 8L, 8R are fixed to the ends of the brackets 18L, 18R in the front-rear direction.

Furthermore, support members 19 are fixed to the back surfaces of stiffeners 17 on both rear sides of the cargo box 3, and a shaft 20 is rotatably fitted into the support members 19. The shaft 20 spans both sides of the cargo box 3, and brackets 21L and 21R are fixed to both ends thereof, and support pins 9L and 9R are fixed to the tips of the brackets 21L and 21R. On the other hand, the chassis 2 has four stays 22L, 22R, 23L in the left and right directions on both the front and rear sides.
23R protrudes laterally and is fixed, and the stay 22
Engagement piece 10 at the tip of L, 22R, 23L, 23R
L, 10R, 11L, and 11R are fixed.
The engagement pieces 10L, 10R, 11L, and 11R are engaged with the support pins 8L, 8R, 9L, and 9R, and are formed with semicircular recesses 24 that open upward. The hooks 12L, 12R, 13L, 13R are formed in a substantially U-shape, and the engaging pieces 10L, 10R, 11L, 1
It is rotatably supported obliquely below the semicircular recess 24 at 1R by a pivot shaft 28 extending in the front-rear direction.

The hooks 12L, 12R, 13L, and 13R are each urged outward and downward (in the direction in which the support pins are secured) by springs (not shown). Stoppa 1
4L, 14R, 15L, 15R are engagement pieces 10L,
10R, 11L, and 11R are rotatably supported on the upper part of the hooks 10R, 11L, and 11R by a pivot shaft 33 in the front-rear direction.
Prevents rotation of 2L, 12R, 13L, and 13R.

The connecting mechanism 6 includes a first link mechanism 36 and a second link mechanism 37, and is connected to the operating means 7. The first link mechanism 36 includes a front right stopper 14R and a rear left stopper 15L located diagonally.
The second link mechanism 37 is connected to the front left stopper 1.
4L and the rear right stopper 15R are respectively connected. The first link mechanism 36 includes bell cranks 3 that are pivotally supported on both sides of the front part and on the left side of the rear part of the chassis 2.
9 and a plurality of rods 40, the bell crank 39 is formed by two or three arms bent at right angles, and is rotatably held at the bent portion by a vertical pivot 41. One arm of the front right bell crank 39 is connected to the operating means 7, the other arm is connected to the front right stopper 14R, and the other arm is connected to one arm of the front left bell crank 39 through a rod 40. The other arm of the front left bell crank 39 is connected to one arm of the rear left bell crank 39, and the other arm of the rear left bell crank 39 is connected to the rear left stopper 15L via a rod 40. Connected by pins. The second link mechanism 37 is composed of a bell crank 42 and a plurality of rods 43, which are pivotally supported at the center of the front part and the right side of the front and rear parts of the chassis.The bell crank 42 has two or three arms bent at right angles. A pivot shaft 44 in the vertical direction is formed at the bent part.
It is rotatably held by.

One arm of the front central bell crank 42 is connected to the operating means 7, the other arm is connected to the front left stopper 14L, and the other arm is connected to one arm of the front right bell crank 42 via a rod 43. The other arm of the front right bell crank 42 is connected to one arm of the rear right bell crank 42, and the other arm of the rear right bell crank 42 is pinned to the rear right stopper 15R via a rod 43. connected. Also all bell cranks 39.4
The arms of 2 are all formed to have the same length, and the rods are 40,
43 has an adjustment part, and the length can be adjusted freely. Furthermore, the first and second link mechanisms 36 and 37 are connected to stoppers 14L, 14R, 15L, and 15R, respectively.
are connected so that when one is in a horizontal hooked state, the other is in an upwardly slanted hooked state.

The operating means 7 is provided in the front of the vehicle chassis 2 (or in the interlocking seat via a push-pull cable), and includes a cam plate 46 rotatably supported by a pivot 45, and a cam plate 46.
6 and a lever 47 integrally connected to the cam plate 46.
It consists of a guide groove 48 provided in. Guide groove 48
are the central arcuate groove 48a and the left and right straight grooves 48b, 4.
8c, and the arcuate groove 48a coincides with an arc centered on the pivot 45. On the other hand, the connecting mechanism 6
The front ends of the rods 40, 43 are provided with rollers 49, 5.
0 are respectively pivotally supported 51 and 52 and are loosely and rollably connected in the guide groove 48, and the slightly rear portions are inserted and supported by support members 53 and 54 so as to be movable back and forth.

Next, the effect will be explained. When the cargo box 3 is seated on the chassis 2, the operating means 7 is in the state shown in FIGS. 2 and 3, and each support pin 8L, 8R, 9L, 9
R are all inserted into the semicircular recess 24, and the hooks 12L, 12R, 13L, and 13R are rotated in the lashing direction as shown by solid lines in FIG.
is closed. When tilting the cargo box 3 backward, the operating means 7 remains as shown in FIGS. 2 and 3, the rear stoppers 15L and 15R are in a substantially horizontal state (see solid lines in FIG. 1), and both hooks 13L are ，
13R is prevented from rotating and both support pins 9L, 9R are secured, the front both side stoppers 14L, 14R are in a state of being rotated diagonally upward, and both hooks 12L, 1
Both support pins 8L and 8R, which allow rotation of 2R, are in a released state. From this state, when a hydraulic cylinder (not shown) is extended, the cargo box 3 is tilted rearward about the shaft 20. At this time, both front hooks 12
L and 12R are rotated inwardly and upwardly by the force of a spring (not shown) as the support pins 8L and 8R move upward.

When loading box 3 is restored from its tilted position, hook 1
2L and 12R rotate counterclockwise against the spring force as the support pins 8L and 8R descend, returning to the state shown by solid lines in FIG.

When tilting the cargo box 3 to the right, when the lever 47 is rotated to the right (Fig. 2), the roller 49 rolls in the guide groove 48b, and the rod 40 of the first link mechanism 36 is moved forward. , the front right stopper 14R becomes horizontal, and the rear left stopper 15
L rotates diagonally upward, while the roller 50 only moves freely within the arcuate groove 48a and the second link mechanism 37
The rod 43 remains stationary, and the right front and rear hooks 12R and 13R are eventually secured, allowing the cargo box 3 to rotate around the support pins 8R and 9R.

When tilting the cargo box 3 to the left, when the lever 47 is rotated to the left, the roller 50 rolls in the guide groove 48c, while the roller 51 moves freely in the guide groove 48b, so that the second The rod 43 of the link mechanism 37 moves forward, the rod 40 of the first link mechanism 36 remains stationary, and the left front and rear stoppers 14L, 15
With L in the horizontal position, right front and rear stoppers 14R, 15
R rotates diagonally upward, and the left front and rear hook 12L,
13L is secured, and the cargo box 3 is secured with support pins 8L and 9L.
It can be rotated using the fulcrum.

Note that the lever 47 is again moved to the neutral position (Figs. 2 and 3).
When the device is rotated to the position shown in the figure, it returns to the state where it can be tilted backwards.

In the embodiment, a three-turn dump truck has been described, but the present invention may be suitable for a side dump truck.

Further, in the embodiment, the stoppers 14L, 14
I rotated R, 15L, and 15R, but hook 12
L, 12R, 13L, and 13R may be directly rotated.

Furthermore, in the embodiment, the engaging pieces 10L, 10
R, 11L, 11R, hook 12L, 12R, 1
3L, 13R, connection mechanism 6, operating means 7, etc. to the chassis 2, and support pins 8L, 8R, 9L, 9R to the cargo box 3.
I showed what was set up in , but it is completely upside down,
The vehicle chassis 2 may be provided with a support pin, and the cargo box 3 may be provided with an engaging piece, a hook, a connecting mechanism, an operating means, etc.

As described above, according to the present invention, the end of the connecting mechanism linked to the lashing member of the hinge is loosely connected to the operating means guide groove, so that the load can be moved in a desired direction by simply operating a single operating means. The box can be tilted, which eliminates equipment damage and accidents caused by erroneous operation.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a perspective view of the hinge operating device, FIG. 2 is a plan view of the operating means, and FIG. 3 is a side view of the same. 1... Hinge operating device, 2... Vehicle chassis, 3... Loading box, 4L, 4R, 5L, 5R... Hinge, 6...
Connection mechanism, 7... Operating means, 8L, 8R, 9L,
9R...Support pin, 48...Guide groove.

Claims (1)

[Claims] 1 A hinge is constructed by providing support pins at four locations on both the front and rear sides of either the bottom of the cargo box or the vehicle chassis, and a lashing member for lashing the support pins at four locations on both the front and rear sides of the other, and two The operating means is provided so as to be able to be linked through a connecting mechanism of the system, and the operating means includes a cam plate having a guide groove formed of an arcuate groove and left and right linear grooves continuous to the arcuate groove, and A hinge operating device for a side dump truck or a three-turn dump truck, characterized in that an end portion is loosely fitted into the guide groove.