JPH04137935U - Concrete mixer vehicle hopper cover - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the hopper cover from protruding upward and to perform opening/closing operations remotely and safely. [Structure] A fixed link 12 is provided horizontally on the vehicle body frame 5 close to the hopper 2, and the base ends of two parallel links 13 and 14 are pivotally connected to both ends of the fixed link, and each other end of the parallel link is A cylinder 18 is connected to one end of the parallel link, and a cylinder 18 is connected to one end of the parallel link.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on a concrete raw material input device installed at the drum entrance of a concrete mixer truck. Regarding the hopper cover that opens and closes the hopper.

0002

[Conventional technology]

Concrete mixer trucks are equipped with a hopper at the entrance of the mixing drum, and this hopper is installed at the entrance of the mixing drum. Raw materials for fresh concrete are introduced from the piper.

0003 Do not let rainwater or garbage enter this hopper while mixing in the drum or when not in use. To prevent dirt from entering the hopper, a hopper cover is normally placed over the input port of the hopper. - is provided that can be opened and closed freely.

0004 On the other hand, an elastic baffle plate made of rubber or the like stands up at the rear end of the hopper opening. This prevents raw materials from popping out or leaking when they are introduced.

[0005] For this reason, conventional hopper covers are tilted diagonally at the rear so that when closed, the hopper cover -The tip of the cover closes the opening that is the input port of the hopper, and the sloped part at the back closes the opening. It is arranged above the baffle plate.

[0006]

[Problem that the idea aims to solve]

However, when the conventional hopper cover is closed, the inclined part is above the baffle plate. The hopper is placed at the rear of the hopper when it is opened, but even then The slanted part above protrudes quite high above the drum, and the vehicle is driven in this condition. This slope may collide with the top of the tunnel, or a part of the building at the construction site. It is dangerous to collide with the

[0007] Furthermore, with conventional hopper covers, workers have to climb up onto the car body frame and remove heavy hopper covers one by one. The upper cover has to be opened and closed manually, making it difficult to work and also dangerous.

[0008] Therefore, the purpose of this invention is to raise the height upward when the hopper cover is closed or opened. It can be placed almost at the same level as the hopper without overhanging, and can be opened and closed remotely. To provide a hopper cover for a concrete mixer truck that can be used safely and efficiently. That is.

[0009]

[Means to solve the problem]

In order to achieve the above purpose, the structure of the present invention is to A fixed link is installed horizontally on the system, and the base ends of two parallel links are attached to both ends of the fixed link. A horizontal cover which opens and closes the opening of the hopper is attached to each other end of the parallel link. - Pivotally attached to the side of the main body, and a cylinder is connected to one end of the parallel link. It is characterized by this.

0010

[Effect]

The horizontal cover body performs circular motion around the base end of the parallel link, and When the hopper is tilted to one side through the cylinder, the cover body will hold the hopper opening horizontally. When closed and tilt the parallel link to the other side, the cover body will move to the rear of the hopper and close the hopper. - Open the opening and place it in a horizontal position. Moreover, for example, behind the hopper Even if the baffle plate stands up at the end, the cover body will stand up by the height of the parallel link. The baffle plate moves over the top of the baffle plate during opening and closing operations. Don't interfere. The opening/closing operation of the cover body is controlled remotely using a cylinder.

[0011]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings.

0012 The mixer truck has a drum 1 above the vehicle body, and ready-mixed concrete is poured into the entrance of the drum 1. A necessary hopper 2 is provided, and a baffle plate 11 is erected at the rear of the hopper 2 to The upper opening 3 of the par 2 is opened and closed by a hopper cover 4.

[0013] On both sides of the hopper 2, a car body side frame 5 that stands upward is installed on the car body. Parallel link mechanisms 6, 6 are connected to this frame 5, and these parallel links Mechanisms 6, 6 are coupled to both sides of the hopper cover 4, and connect the parallel link mechanisms 6, 6. The hopper cover 4 is opened and closed through the opening and closing operation.

[0014] The hopper cover 4 has a horizontal cover body 7 and a hinge part 8 on the front side of the cover body 7. A horizontal auxiliary cover 9 is foldably connected to the rear part of the cover body 7 through the The horizontal seal member 10 is provided with an elastic horizontal seal member 10. However, the hopper cover 4 is a horizontal cover body that is approximately the same size as the opening 3 of the hopper 2. It may be a plate made of.

[0015] The parallel link mechanism 6 includes a lower fixed link 12 fixed to the upper part of the frame 5, and a lower fixed link 12 fixed to the upper part of the frame 5. A long parallel link 13 rotatably pivoted to both front and rear ends of a horizontal fixed link 12; Parallel links 14 that are shorter than this, and the body of one parallel link 13 and the other parallel link The upper horizontal link 16 has both ends pivotally connected to the upper end of the link 14. The link 16 is fixed to the side surface of the cover body 7. The upper horizontal link 16 is a cover Since it is fixed to the main body 7 and is integrated with the cover main body 7, it can be eliminated and the parallel link 13 and 14 may be pivoted directly to the side surface of the cover body.

[0016] An arm 20 is installed on the top of one long parallel link 13, and this arm 20 An auxiliary arm 21 is provided in the middle of the auxiliary arm 21 facing forward. It is pivotally attached to a bracket 22 provided on the upper surface of the auxiliary cover 9. However, parallel phosphorus The upper part of the cover 13 may be pivotally attached to the vicinity of both sides of the auxiliary cover 9 via another arm. stomach.

[0017] An arm 17 is integrally connected to the lower part of the parallel link 14 directly or via a shaft or the like. A hydraulic or pneumatic cylinder 18 is interposed between this arm 17 and the vehicle frame 5. The parallel link 14 can be moved to one side by expanding and contracting the cylinder 18 by remote control. Push or pull in the direction.

[0018] The parallel link mechanisms 6, 6 provided on both sides of the hopper cover 4 have the same structure. However, a lever 15 is connected to the arm 17 of one parallel link mechanism 6. , while deforming the parallel link mechanism 6 with this lever 15, the hopper cover 4 is opened. The closing operation can also be performed manually. However, this lever 15 is missing. is also available.

[0019] The parallel link 14 is connected via the cylinder 18 to the hopper in the counterclockwise direction in FIG. When rotated in two directions, the other parallel link 13 moves in conjunction with this parallel link 14. The horizontal link 16 and the cover body 7 are rotated in the direction of the opening 3 of the hopper 2. The cover main body 7 and the auxiliary cover 9 close the opening 3 by moving to the upper part. On this occasion, The auxiliary cover 9 is pushed by the auxiliary arm 21 as the parallel link 13 rotates, and the hinge The opening 3 is closed while rotating via the hinge 8. At this time, the end of the seal member 10 is The opening 3 is sealed by coming into contact with the front surface of the baffle plate 11.

[0020] Compress the cylinder 18 from the above closed state and rotate the parallel link 14 in the opposite direction. Then, the cover body 7 moves in the opening direction via the parallel rings 13 and 14.

[0021] When the parallel rings 13 and 14 rotate clockwise while moving in an arc, the parallel rings The cover main body 7 moves upward by the length of the blocks 13 and 14, climbs over the baffle plate 11 and rearwards. It moves toward the rear, and is eventually supported in a horizontal position on the rear support frame 19, and the hot Open opening 3 for par 2.

[0022] At this time, the auxiliary cover 9 is inserted through the hinge part 8 so that it does not interfere with the baffle plate 11. It is bent above the bar body 7 (FIG. 3).

[0023] By bending the auxiliary cover 9 in this way, the hopper cover 4 It is possible to shorten the length of the Even if you drive, you can prevent collisions with tunnels, etc.

[0024]

[Effect of the idea]

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

[0025] 1) The hopper cover is opened and closed via a parallel link with the cylinder, and is You can close the hopper cover without having to manually lift it each time. It can be moved both in the same direction and in the opening direction, making it easy to operate and safe.

[0026] 2) Even if the baffle plate stands up at the end of the hopper, the hopper cover will remain circular due to the parallel links. Because you can move in the closing direction and opening direction by getting over this baffle board while exercising, The hopper cover is placed horizontally in the closed state and open state when it has overcome this baffle plate. Can be placed. For this reason, the hopper cover may collide with the tunnel while the mixer truck is running. This can prevent collisions with parts of buildings.

[0027] 3) The hopper cover consists of a horizontal cover body, so the hopper opening It can be placed horizontally when the section is closed or when it is moved backwards and closed. Also, fold Even if a foldable auxiliary cover is provided, it is not that high above the main body cover. It only needs to be folded within the range, and a part of the hopper cover may protrude upwards and collide with other objects. Collision can be prevented.

[Brief explanation of 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 similarly showing the closed state.

FIG. 3 is a perspective view similarly showing the opened state.

[Explanation of symbols]

2 hopper 3 Opening 4 Hopper cover 5 Vehicle side frame 6 Parallel link mechanism 7 Cover body 8 Hinge part 9 Auxiliary cover 12 Fixed link 13 Parallel link 14 Parallel link 16 Horizontal link 18 cylinder 20 arm 21 Auxiliary hoom

Claims (1)

[Scope of utility model registration request] Claim 1: A fixed link is provided horizontally on the vehicle body frame close to the hopper, the base ends of two parallel links are pivotally connected to both ends of the fixed link, and the other end of each of the parallel links is connected to the hopper. 1. A hopper cover for a concrete mixer vehicle, characterized in that the cover is pivotally attached to the side surface of a horizontal cover body that opens and closes an opening, and a cylinder is connected to one end of the parallel link.