JPH081650A - Cover device of concrete mixer - Google Patents

Abstract

PURPOSE:To enable an open part of a ready-mixed concrete receiving hopper to be covered and uncovered by a method wherein a cover is rotatably provided so as to cover the top open part of the ready-mixed concrete receiving hopper installed adjacently to a drum of a concrete mixer. CONSTITUTION:A cover 7 is provided for covering and uncovering a top open part of a ready-mixed concrete receiving hopper 2 disposed adjacently to an open part of a drum 1 of a concrete mixer. The cover 7 can be horizontally rotated for covering and uncovering the open part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a lid for opening and closing the upper opening of a ready-mixed concrete (hereinafter simply referred to as ready-mixed concrete) receiving hopper adjacent to the opening of a drum of a concrete mixer truck. The present invention relates to a device that can be opened and closed.

[0002]

2. Description of the Related Art Conventionally, there is no unit provided with an openable lid on the top of a ready-mixed concrete receiving hopper provided adjacent to an opening of a drum of a concrete mixer truck.

[0003]

Since the conventional concrete mixer truck does not have an openable lid at the top opening of the ready-mixed concrete receiving hopper provided adjacent to the opening of the drum, it can be used on a bad weather day. Rainwater, snow, etc. could enter the drum when running, stopped, or working with the raw concrete in the drum, and the amount of water in the raw concrete increased to make it unusable. In addition, if the vehicle is parked outdoors during nights with bad weather, a large amount of rain and snow will get inside the drum, so it will be difficult to use it without draining the rainwater inside the drum. Drainage work had to be done. Especially in winter, the snow in the drum freezes, which makes it difficult to discharge it. Therefore, when working during rain or snow, a cloth lid was hung on the top of the ready-mixed concrete receiving hopper, but it was dangerous because the footing was bad, and the worker was confused. The present invention
It was invented in order to solve such a problem in the conventional art.

[0004]

SUMMARY OF THE INVENTION The present invention provides a lid for opening and closing an upper portion of a ready-mixed concrete receiving hopper provided in the upper portion of a drum of a concrete mixer truck, the lid being provided adjacent to a tip opening portion of the drum. In addition to being rotatable in the horizontal direction, the lid is supported by a shaft of a motor capable of normal and reverse rotation, and the lid can be opened and closed according to forward and reverse rotation of the shaft.

[0005]

When the switch rotates the motor in the forward direction, the motor shaft rotates in the closing direction to close the lid. When the switch rotates the motor in the reverse direction, the motor shaft rotates in the opening direction to open the lid.

[0006]

An embodiment of the present invention will be described with reference to the drawings.
The lower parts of the columns 3 protruding from both sides of the ready-mixed concrete receiving hopper 2 provided adjacent to the opening at the rear of the drum 1 provided in the concrete mixer truck are fixed to the vehicle body, and the left and right fixed to the upper part thereof. Between the frames 4, 4 is provided a scattering prevention cover 5 formed in a U shape by a rubber plate. A motor (hereinafter simply referred to as a motor) 6 capable of rotating in the forward and reverse directions is fixed to the frame 4 on one side. Further, there is provided a substantially flat plate-like lid 7 formed to cover the upper surface from the inside of the scattering prevention cover 5 to the rear end of the freshly mixed concrete receiving hopper 2, and one end thereof is fixed to the shaft 8 of the motor 6. The lid 7 is horizontally rotated in response to the rotation of the shaft 8. Also, three ribs 9 each having one end fixed to the shaft 8 of the motor 6
However, the lid 7 is reinforced by being fixed to the upper surface of the lid 7. Although not shown, the motor switch is preferably installed in the driver's cab and in the vicinity of the ready-mixed concrete receiving hopper 2, and the car battery is used as the power source of the motor.

When the concrete mixer truck provided with the lid device of the present invention is run, or when the vehicle is parked outdoors after the work is completed, the lid 7 covers the opening of the ready-mixed concrete receiving hopper 2. In this case, Operates the switch of the motor 6 to rotate it in the forward direction.
Rotates in the normal direction to rotate the lid 7 to cover the upper opening of the ready-mixed concrete receiving hopper 2. In this case, the rotation of the motor 6 is stopped by the switch. In this state, rainwater and snow can be prevented from entering.

Contrary to the above, when opening the upper surface of the ready-mixed concrete receiving hopper 2, when the motor 6 is reversely rotated by the switch, the lid 7 is rotated in the opposite direction to the above.
The upper surface of the ready-mixed concrete receiving hopper 2 is opened, and the rotation of the motor is stopped when the opening is completed. In this case, the state shown in FIG. 4 is obtained, and ready-mixed concrete can be introduced, and the scattering prevention cover 5 can prevent scattering of fresh mix. It should be noted that it is possible to rotate the lid 7 in the horizontal direction by using a handle on the upper surface of the lid and operating the handle manually without using a forward / reverse rotation motor, but it is difficult because the position is high. And dangerous.

[0009]

The concrete mixer truck provided with the lid device of the present invention can cover the upper opening of the ready-mixed concrete receiving hopper with a lid while traveling or outdoors while parking or working, so that it can be used even in bad weather. Since rain and snow do not enter the drum, it is possible to prevent the ready-mixed concrete from becoming unusable due to excessive water content. Even if you park outdoors at night, rain and snow will not enter the drum, so the water and snow in the drum will not freeze,
Further, it is convenient because there is no need to perform the action of discharging the water that has entered the drum. In addition, it is not necessary to hang cloth etc. in a bad footing condition, which makes the worker easy, but the particular advantage is that the water content of the ready-mixed concrete in the drum does not increase and the normal condition can be maintained at all times. , Being able to always perform normal concrete work.
Further, in the present invention, since it is not necessary to change the shape of the scattering prevention cover, the effect of preventing scattering of fresh concrete does not deteriorate. Furthermore, since the lid device of the present invention has a simple structure, it has advantages that it is easy to manufacture, the manufacturing cost is low, and the operation is easy.

[Brief description of drawings]

FIG. 1 is a side view of a concrete mixer truck provided with a lid device of the present invention.

FIG. 2 is a side view of the lid device of the present invention in which the lid covers the upper portion of the ready-mixed concrete receiving hopper.

FIG. 3 is a plan view of the lid device of the present invention, in which the lid covers the upper portion of the ready-mixed concrete receiving hopper.

FIG. 4 is a plan view of the lid device of the present invention in a state in which a lid that covers an upper portion of a freshly mixed concrete receiving hopper is opened.

[Explanation of symbols]

 1 ... Drum 2 ... Ready-mixed concrete receiving hopper 3 ... Support post 4 ... Frame 5 ... Scatter prevention cover 6 ... Motor 7 ... Lid 8 ... Motor shaft 9 ... rib

Claims (1)

[Claims] 1. A drum for a concrete mixer truck (1)
A lid (7) for opening and closing the upper opening of the ready-mixed concrete receiving hopper (2) provided adjacent to the tip opening of the drum (1) is provided at the upper part of the opening of The lid (7) is supported by a shaft (8) of a motor (5) that can rotate in the forward and reverse directions provided on the frame (4) above the provided support (3), and the shaft (8) can rotate in the forward and reverse directions. A lid device for a concrete mixer truck, characterized in that the lid device (7) can be opened / closed accordingly.