JP2586035Y2 - Concrete mixer car hopper cover - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hopper cover for opening and closing a hopper for charging concrete material provided at a drum entrance of a concrete mixer truck.

[0002]

2. Description of the Related Art A concrete mixer truck is provided with a hopper at the entrance of a mixing drum, from which raw concrete material is introduced.

In order to prevent rainwater and dust from entering the hopper during mixing in the drum or when not in use, a hopper cover as a lid is normally provided at the inlet of the hopper so as to be openable and closable. Have been.

On the other hand, an elastic baffle made of rubber or the like stands upright at the rear end of the opening of the hopper to prevent the raw material from jumping out or leaking when the raw material is charged.

For this reason, the conventional hopper cover is inclined rearward in an oblique direction, and when closed, the front end of the hopper cover seals the opening serving as the input port of the hopper and the rear inclined portion is disposed above the baffle plate. It has become so.

[0006]

However, when the conventional hopper cover is closed, the inclined portion is disposed above the baffle plate, and when the cover is opened, the inclined portion is moved to the rear of the hopper. Of the tunnel is considerably high above the drum, and when traveling in this state, the slope collides with the upper surface of the tunnel or a part of the building at the building site, which is dangerous.

Further, the conventional hopper cover has a poor workability and is dangerous because a worker rises above the body frame and manually opens and closes the heavy hopper cover.

Accordingly, an object of the present invention is to prevent the hopper cover from protruding high when the hopper cover is closed and open, to be disposed at substantially the same level as the hopper, and to be able to remotely open and close the hopper and safely. It is to provide a hopper cover for a concrete mixer car.

[0009]

In order to achieve the above-mentioned object, a means of the present invention is to provide a hopper at an inlet of a drum, a horizontal cover body provided at an opening of the hopper so as to be freely opened and closed, and an opening of the hopper. An elastic baffle plate stands upright at the rear end, an elastic seal member is provided at the rear of the cover body, and a concrete mixer truck in which a support frame is disposed behind the hopper. A fixed link is provided horizontally on the vehicle body side frame, the base ends of the two parallel links are pivotally attached to both ends of the fixed link, and the other ends of the parallel links are pivotally attached to the side surfaces of the cover body. A cylinder is connected to one end of the parallel link.

[0010]

The horizontal cover body makes a circular motion about the base end of the parallel link, and when the parallel link is tilted to one side via a cylinder, the cover body closes the opening of the hopper in a horizontal state and the parallel link closes the other side. The cover body moves to the rear of the hopper to open the opening of the hopper and to be placed in a horizontal state. Moreover, for example, even if the baffle plate stands upright at the rear end of the hopper, the cover body rises up by the height of the parallel link, and moves over the baffle plate during opening and closing operations, so that the baffle plate Does not interfere.
The opening and closing operation of the cover body is remotely controlled by a cylinder.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The mixer truck has a drum 1 provided above the vehicle body,
A hopper 2 for putting ready-mixed concrete is provided at the entrance of the drum 1, and a baffle plate 11 is erected behind the hopper 2,
The upper opening 3 of the hopper 2 is opened and closed by a hopper cover 4.

On both sides of the hopper 2, the vehicle body is provided with a vehicle body side frame 5 which stands upright, and parallel link mechanisms 6, 6 are connected to the frame 5, and the parallel link mechanisms 6, 6 are connected to the hopper cover 4 The hopper cover 4 is opened and closed via the parallel link mechanisms 6 and 6.

The hopper cover 4 has a horizontal cover body 7.
And a horizontal auxiliary cover 9 foldably connected to the front side of the cover body 7 via a hinge portion 8, and an elastic horizontal seal member 10 provided at the rear of the cover body 7. However, the hopper cover 4 may be a plate composed of only a horizontal cover body having a size substantially equal to the size of the opening 3 of the hopper 2.

The parallel link mechanism 6 includes a lower fixed link 12 fixed to an upper portion of the frame 5 and the horizontal fixed link 1.
Long parallel link 1 pivotally attached to both front and rear ends of 2
3 and a shorter parallel link 14, an upper horizontal link 16 having both ends pivotally connected to the trunk of one parallel link 13 and the upper end of the other parallel link 14, and the upper horizontal link 16 is It is fixed on the side. The upper horizontal link 16 is fixed to the cover body 7 and the cover body 7
And the parallel links 13, 1
4 may be pivoted directly to the side of the cover body.

An arm 20 is provided on the upper part of one of the long parallel links 13, and an auxiliary arm 21 is provided in the middle of the arm 20 toward the front, and a tip of the auxiliary arm 21 is provided on the upper surface of the auxiliary cover 9. Bracket 22. However, the upper part of the parallel link 13 may be pivotally connected to the vicinity of both side surfaces of the auxiliary cover 9 via another arm.

An arm 17 is integrally connected to the lower portion of the parallel link 14 directly or via a shaft or the like. A hydraulic or pneumatic cylinder 18 is provided between the arm 17 and the vehicle body side frame 5.
And pushes or pulls the parallel link 14 in one direction by extending and contracting the cylinder 18 by remote control.

Although the parallel link mechanisms 6 and 6 provided on both sides of the hopper cover 4 have the same structure, a lever 15 is connected to the arm 17 of one of the parallel link mechanisms 6. The user can manually open and close the hopper cover 4 while deforming the parallel link mechanism 6 with. However, the lever 15 can be used without it.

When the parallel ring 14 is rotated through the cylinder 18 in the direction of the hopper 2 which is a counterclockwise direction in FIG.
3 rotates in the same direction, and the horizontal link 16 and the cover body 7 move to the upper part of the opening 3 of the hopper 2 so that the cover body 7 and the auxiliary cover 9 close the opening 3. At this time, the auxiliary cover 9 is pushed by the auxiliary arm 21 with the rotation of the parallel link 13, and closes the opening 3 while rotating via the hinge 8. When the cover body 7 moves to the upper part of the opening 3, the seal member 10 interferes with and comes into contact with the baffle plate 11. However, since the seal member 10 is formed of an elastic material such as a comb and has elasticity, The seal member 10 slightly deforms or bends to get over the baffle plate 11. Moreover, when the cover body 7 closes the opening 3, the baffle 1
The opening 3 is sealed by elastically contacting the front surface of the opening 1. Similarly, the seal member 10 can elastically deform and move over the baffle plate 11 when moving in the opposite direction.

When the cylinder 18 is compressed from the above closed state and the parallel link 14 is rotated in the reverse direction, the cover body 7 is rotated.
Moves in the opening direction via the parallel rings 13 and 14.

When the parallel rings 13 and 14 rotate clockwise while moving in an arc, the cover body 7 moves upward by the length of the parallel links 13 and 14, moves over the baffle plate 11 and moves rearward. Specifically, it is horizontally supported on a rear support frame 19 and opens the opening 3 of the hopper 2.

At this time, the auxiliary cover 9 is bent over the cover body 7 via the hinge 8 so as not to interfere with the baffle plate 11 (FIG. 3).

By folding the auxiliary cover 9 in this manner, the length of the hopper cover 4 can be shortened, and the hopper cover 4 does not protrude extremely upward. Can be prevented.

[0024]

According to the present invention, the following effects are obtained.

1) The hopper cover can be opened and closed via a cylinder and a parallel link, and can be remotely operated. Therefore, the hopper cover can be moved in the closing direction and the opening direction without manually lifting the hopper cover.
It is also safe.

2) Even if the baffle plate stands at the end of the hopper, the hopper cover can move in the closing direction and the opening direction by moving over the baffle plate while making a circular motion with the parallel link. The hopper cover can be placed horizontally in the closed or open state. Therefore, it is possible to prevent the hopper cover from colliding with the tunnel or colliding with a part of the building while the mixer vehicle is running.

3) The hopper cover is made up of a horizontal cover body, and an elastic seal member is provided at the rear of the cover body. Together, the rear of the opening can be sealed. Further, even if the seal member comes into contact with the baffle plate during the movement of opening and closing the cover body, it slightly deforms or bends and gets over the baffle plate. Further, even when the cover main body is opened, the cover main body is supported by the rear support frame and can be arranged horizontally.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a moving state of a hopper cover according to the present invention.

FIG. 2 is a perspective view showing a closed state.

FIG. 3 is a perspective view showing the open state.

[Explanation of symbols]

 2 Hopper 3 Opening 4 Hopper Cover 5 Body Side Frame 6 Parallel Link Mechanism 7 Cover Body 8 Hinge 9 Auxiliary Cover 12 Fixed Link 13 Parallel Link 14 Parallel Link 16 Horizontal Link 18 Cylinder 20 Arm 21 Auxiliary Foom

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-232136 (JP, A) JP-A 62-29597 (JP, U) JP-A-3-42618 (JP, U) JP-A 153909 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60P 3/16 B28C 5/42

Claims (1)

(57) [Scope of request for utility model registration] 1. A hopper is provided at an entrance of a drum, a horizontal cover body is provided at an opening of the hopper so as to be openable and closable, and an elastic baffle plate stands upright at a rear end of the opening of the hopper. An elastic seal member is provided at the rear part, and furthermore, in a concrete mixer vehicle in which a support frame is provided behind the hopper, fixed links are horizontally provided on a vehicle body side frame close to the hopper, and at both ends of the fixed link. The base ends of the two parallel links are pivotally connected, the other ends of the parallel links are pivotally connected to the side surfaces of the cover body, and a cylinder is connected to one end of the parallel link. A hopper cover for a concrete mixer car.