JP2582805Y2 - Gate opening and closing device for concrete bucket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for remotely opening and closing a gate of a pneumatic concrete bucket used for placing concrete in civil engineering work or the like.

[0002]

2. Description of the Related Art First, a conventional pneumatic concrete bucket will be described with reference to FIG.

In FIG. 1, a pair of gates 2 are provided in an air-type concrete bucket 1A. The gate 2 is opened by a contraction operation of an air cylinder 3 for discharging concrete to discharge concrete. The air cylinders 3, 3 are connected to an air tank 4 via a switching valve 5,
One end of a concrete discharging cord 8 is connected to a switching lever 6 pivotally attached to the switching valve 5. The concrete discharging cord 8 is directed downward via two pulleys 9 pivotally supported by the bucket 1A, and a handle 8a is provided at the other end. The reference numeral 7 in the drawing denotes a switching lever 6.
And the air cylinder 3
Are configured to perform a contraction / extension operation by switching a supply direction and a discharge direction of air.

When the worker M pulls the cord, the switching lever 6 rotates counterclockwise to move the switching valve 5 to the contracted side. Then, the air in the air tank 4 is supplied to the switching valve 5.
Is supplied to the cylinder chambers on the contracting side of the air cylinders 3 and 3, the air in the cylinder chamber on the extending side of the air cylinders 3 is discharged, and the air cylinders 3 and 3 contract to operate and the gates 2 and 2 are operated.
Open and release concrete.

When the worker M releases the string 8, the return lever 7 urges the switching lever 6 to return to the original position, and switches the switching valve to the extension operation. Therefore, air is supplied to the air cylinder chamber on the extension side of the air cylinders 3, 3, and the air in the air cylinder chamber on the contraction side is discharged, and the air cylinders 3, 3 extend to close the gates 2, 2.

[0006]

In the conventional pneumatic concrete bucket 1A, since the worker M operates the string 8 near the bucket 1A during concrete casting, there is a risk of being caught between the bucket 1A and a structure. It is not preferable from the viewpoint of safety.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gate opening / closing device for a concrete bucket which can be easily improved and can be manually operated.

[0008]

According to the present invention, when the string (8) for discharging concrete is pulled, the air switching valve (5) is switched to operate the cylinder (3) for discharging concrete, and the gate (2) is opened. In a concrete gate opening / closing device for a concrete bucket (1) which opens and discharges concrete, the concrete bucket (1) is provided with an electromagnetic air cylinder (10) vertically below a concrete discharging cord (8), The piston rod (11) of the electromagnetic air cylinder (10) is connected to the concrete discharging cord (8), and the electromagnetic valve of the electromagnetic air cylinder (10) is always open to the atmosphere. 4) communicates with the concrete discharging cylinder (3) to contract and operate to pull the concrete discharging string (8);
It comprises a control device (12) for controlling the electromagnetic valve of the electromagnetic air cylinder (10) and a battery (14). The control device (12) is provided with a receiver (13). ) Has a transmitter (15) that transmits an open signal to the receiver (13) when the open button (15a) is pressed.

[0009]

[0010]

[0011]

[0012]

[0013]

[Explanation of operation and effect] Therefore, when the worker presses the open button of the transmitter, the transmitter transmits an open signal, and the receiver that has received the open signal sends the open signal to the control device, and the control device opens. A valve signal is output to a solenoid valve of an electromagnetic air cylinder to open the solenoid valve. Then, the solenoid valve operates the electromagnetic air cylinder to pull the string for discharging concrete, so that the concrete bucket opens to discharge concrete.
When the release button is released, the solenoid valve returns to the atmosphere release position and the gate closes. Therefore, the battery, the control device, the electromagnetic air cylinder, and the like may be attached to the conventional product, and the conventional product can be easily improved to be remotely operated. Moreover, since the string for discharging concrete is left as it is, the string can be manually pulled as needed, which is convenient.

[0014]

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

In FIG. 1, parts corresponding to those in FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 1, an electromagnetic air cylinder 10 is provided vertically below a concrete discharging cord 8 in a pneumatic concrete bucket 1,
The string 8 is connected to the zero piston rod 11.

The bucket 1 is provided with a control device 12 having a receiver 13 near the electromagnetic air cylinder 10 and a battery 14. Further, a transmitter 15 operated by the worker M is provided. An electromagnetic valve (not shown) of the electromagnetic air cylinder 10 is connected to the control device 12 and the air tank 4, respectively, and the battery 15 is connected to the control device 12.

The electromagnetic air cylinder 10 is configured to contract when the air is supplied and to extend when the air is discharged.

The solenoid valve is normally open to the atmosphere and is configured to open in response to a valve opening signal from the controller 12.

The transmitter 15 is provided with an open button 15a. When the open button 15a is pressed, an open signal is transmitted.

The control device 12 is configured to output a valve opening signal to the solenoid valve based on an opening signal from the transmitter 15.

Next, the operation will be described.

At the time of placing concrete, the worker
When the 5 open button 15a is pressed, the transmitter 15 transmits an open signal. The control device 12 receives the opening signal via the receiver 13, receives the opening signal via the receiver 13, and outputs a valve opening signal to the solenoid valve based on the opening signal. Then, the electromagnetic valve is opened, and the air in the air tank 4 is supplied to the electromagnetic air cylinder 10. Thereby, the electromagnetic air cylinder 10 contracts and the concrete discharging cord 8
Pull. Therefore, as described above, the concrete discharging air cylinders 3, 3 are contracted, and the gates 2, 2,
Open and release concrete.

When the worker M presses the open button 1 of the transmitter 15
When the pressing of 5a is stopped, the transmission of the open signal is stopped. Then, the control device 12 stops the valve opening signal to the solenoid valve.
As a result, the solenoid valve returns to the open-to-atmosphere position, and exhausts air from the electromagnetic air cylinder 10. Then, the electromagnetic air cylinder 10 is extended and the string 8 for releasing concrete is loosened. Accordingly, as described above, the concrete discharging air cylinders 3, 3 are extended and the gates 2, 2 are closed to stop discharging concrete.

[0025]

[Effects of the Invention] As described above, according to the present invention, the following excellent effects can be obtained. (A) A battery, a control device, an air cylinder, and the like may be attached to the conventional product, and the conventional product can be easily improved. (B) The bucket can be opened by pulling the string manually, which is convenient. (C) Since the solenoid valve is open to the atmosphere when there is no open signal, the gate is closed by its own weight, and there is no special means, thus simplifying the entire apparatus.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a side view showing a conventional pneumatic concrete bucket.

[Explanation of symbols]

 1, 1A ... air-type concrete bucket 2 ... gate 3 ... air cylinder for discharging concrete 4 ... air tank 5 ... switching valve 6 ... switching lever 7 ... return spring 8 ...・ Concrete release cord 8a ・ ・ ・ handle 9 ・ ・ ・ pulley 10 ・ ・ ・ electromagnetic air cylinder 11 ・ ・ ・ piston rod 12 ・ ・ ・ control device 13 ・ ・ ・ receiver 14 ・ ・ ・ battery 15 ・ ・ ・Transmitter 15a: Open button

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 21/02

Claims (1)

(57) [Scope of request for utility model registration] When the string for discharging concrete is pulled, the air switching valve (5) is switched to operate the cylinder (3) for discharging concrete and open the gate (2) to release the concrete bucket (1). In the gate remote opening / closing device of (1), an electromagnetic air cylinder (10) is vertically provided below the concrete discharging cord (8) in the concrete bucket (1), and a piston of the electromagnetic air cylinder (10) is provided. A rod (11) is connected to a concrete discharge string (8), and its electromagnetic air cylinder (1
The solenoid valve of 0) is always open to the atmosphere, and is configured to communicate with the air tank (4) and the concrete discharging cylinder (3) to contract and operate to pull the concrete discharging cord (8) when the valve is opened. A control device (12) for controlling a solenoid valve of the electromagnetic air cylinder (10) and a battery (14)
The control device (12) is provided with a receiver (13), and the worker (M) transmits an open signal to the receiver (13) when the open button (15a) is pressed. A gate remote opening / closing device for a concrete bucket, characterized by having (15).