JPH0565992A - Liquified gas charging cylinder valve on-off device - Google Patents

Abstract

PURPOSE:To provide a cylinder valve on-off device, automatically opening or closing a handle of a liquified gas charging cylinder in a mechanical manner, which will not generate an on-off completion signal unless the cylinder valve becomes turned to a state of being fully closed. CONSTITUTION:When turning to a state of being fully closed, rotation of a clamp part 3 is stopped by a handle 2. If so, a component force E in direction of sliding a first gear 9 to a supporting shaft 8 against the energization of an energizing means 19 acts on a tilted tooth of this first gear 9 interposing between the stopped supporting shaft 8 and a second gear 10 being driven by a rotational driving source 11, so that the first gear 9 gets moving. A first detecting means 20 detects any movement of this first gear 9, and it judges that a cylinder valve 1 has turned to a state of being fully closed, outputting a closing completion signal A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container valve opening / closing device for automatically opening / closing a handle of a liquefied gas filling container valve.

[0002]

2. Description of the Related Art To fill a liquefied gas filling container,
Attach the filling nozzle to the container valve of the liquefied gas filling container,
When the container valve is opened by opening the container valve and the filling nozzle is removed, it is necessary to turn the container valve handle to close the container valve when removing the filling nozzle. JP-A-60-196497 discloses a device for automatically opening and closing the container valve by automatically turning the handle of the container valve.

As shown in FIG. 4, in this conventional device, a handle portion 2 of a container valve 1 is covered with a clamp portion 3, and the clamp portion 3 is rotated by a rotary actuator 4 at a constant angle to open the container valve 1 so that it is constant. Turned only at an angle and closed.

In the filling process, an operator attaches the filling valve 5 to the container valve 1, the clamp portion 3 rotates the handle 2, and when the output shaft of the rotary actuator 4 rotates by a specified angle, the container valve 1 is fully opened. Therefore, the liquefied gas supply path to the filling valve 5 is opened and the filling valve 5 is filled.

When a required amount of liquefied gas flows in, the rotary actuator 4 drives the handle 2 to close the container valve 1, and the filling valve 5 is removed from the container valve 1.

[0006]

When attempting to automate the attachment / detachment of the filling valve 5, the rotary actuator 4 detects the opening / closing completion signal A generated when the rotary actuator 4 has finished turning the handle 2 in the closing direction by a specified amount, and the opening / closing completion signal is detected. The filling valve 5 is generally configured to be detached from the container valve 1 when A is detected. However, even if the opening / closing completion signal A is detected, the container valve 1 may not be completely closed. Yes, in this case, when the filling valve 5 is detached from the container valve 1, the filled liquefied gas is discharged.
It will be blown out from and is dangerous.

An object of the present invention is to provide a liquefied gas filling container valve opening / closing device in which the opening / closing completion signal A is not generated unless the container valve 1 is completely closed.

[0008]

According to a first aspect of the present invention, there is provided a filling container valve opening / closing device which is slidable in the axial direction of a support shaft of the clamp part and a clamp part which engages with a handle of the container valve. A first gear that is movable and rotates integrally with the support shaft, a biasing unit that biases the first gear toward one side in the axial direction, and a second gear that meshes with the first gear. , Second
And a rotary drive source for driving the gear of the first gear, the teeth of the first gear are formed in a straight line, and the first gear moves above the support shaft against the bias of the biasing means. It is characterized in that a first detecting means for detecting the movement to the other side is provided.

According to a second aspect of the present invention, there is provided a filling container valve opening / closing device in which the rotary drive source according to the first aspect comprises a rack that meshes with a second gear and a cylinder device that drives the rack, and the rack is defined. A second detecting means for detecting that the rack has moved by an amount is provided, and the first detecting means detects that the first moving means has moved against the bias of the biasing means, and the second detecting means causes the rack to move by a specified amount. It is characterized in that a control unit is provided for detecting a logical product that has detected the movement.

[0010]

According to the structure of the first aspect, when the plug is closed, it operates as follows. When the rotary drive source is operated, the support shaft is rotationally driven in the closing direction via the second gear and the first gear. The torque acting on the support shaft is small until the cap is completely closed, the first gear is in the position biased by the biasing means, and the first detecting means does not detect the first gear.

When the cap is completely closed, rotation of the clamp portion is stopped by the handle. Then, the first gear that is interposed between the support shaft whose rotation is stopped and the second gear that is driven by the rotary drive source is the first gear that resists the bias of the biasing means. The component force in the direction of sliding the gear of (1) with respect to the support shaft acts on the inclined teeth to move the first gear.

The first detecting means detects the movement of the first gear and determines that the container valve is completely closed. According to the configuration of claim 2, the detection output of the first detection unit that detects that the first gear has moved against the bias of the biasing unit and the rack of the rotary drive source has moved by a specified amount. One of the detection output of the first detection means and the detection output of the second detection means, which is detected by the control section as a logical product with the detection output of the second detection means for detecting The open / close completion signal is not output by itself.

[0013]

Embodiments of the present invention will be described below with reference to FIGS. It should be noted that components having the same operations as those of the conventional example shown in FIG.

The liquefied gas filling container valve opening / closing device 6 shown in FIG. 2 is configured to be movable up and down with respect to the liquefied gas filling container 7 to be filled. Specifically, after the filling valve 5 is attached to the container valve 1, the liquefied gas filling container valve opening / closing device 6 is lowered so that the clamp portion 3 covers the handle 2 of the container valve 1 as shown in FIG.

The support shaft 8 of the clamp portion 3 has a first gear 9
And is rotationally driven by the rotary drive source 11 via the second gear 10. In this embodiment, the rotary drive source 11 is the second gear 10
A rack 12 that meshes with the rack 12 and a cylinder device 13 that drives the rack 12. The angles formed by the rotational axes of the first and second gears 9 and 10 are orthogonal, the first gear 9 is a linear worm gear with the teeth B inclined, and the second gear 10 is a worm gear. Is.

The support shaft 8 has a first tube 15 received via a bearing 14 and a second tube 15 received via a bearing 16.
The tube 17 is rotatably supported about its axis and is supported by bearings 14 and 16 so that the support shaft 8 does not move in the vertical direction, although not shown.

A key groove 18 is formed on the support shaft 8, and a key [not shown] that engages with the key groove 18 is formed on the inner peripheral portion of the first gear 9. The first gear 9 is slidable in the axial direction of the support shaft 8 and rotates integrally with the support shaft 8.

A compression spring 19 as an urging means is interposed between the first gear 9 and the upper pipe 13, and the first gear 9 is a compression spring in the state of being closed as shown in FIG. It is in contact with the end surface of the lower pipe 17 by the bias of 19.

With this construction, when the cylinder device 13 is further extended from the state shown in FIG. 1, the second gear 10 rotates in the direction of arrow C with respect to the movement of the rack 12, and the first gear 9 moves in the direction of arrow. It rotates in the D direction, and the support shaft 8 and the clamp portion 3 turn the handle 2 to close it.

When the handle 2 reaches the position where the stopper is completely closed, the support shaft 8 does not rotate when the rack 12 is driven.
The turning force transmitted from the second gear 10 to the first gear 9 is
Due to the beveled tooth B shape of the first gear 9, a compression spring
It acts as a component force E in the direction of pushing up the first gear 9 against the bias of 19 and the first gear 9 moves along the key groove 18 of the support shaft 8 as shown in FIG. Rise until it touches.

In this embodiment, a limit switch 20 as a first detecting means is provided so as to detect the first gear 9 that has risen until it comes into contact with the upper pipe 15, and the limit switch 20 is the first. By outputting the plug closure completion signal A when the gear 9 is detected, even if the filling valve 5 is removed from the container valve 1, the filled liquefied gas does not blow out, which is safe.

Further, a limit switch 21 as a second detecting means is provided so as to detect that the rack 12 has moved by a specified amount. The limit switch 20 detects the first gear 9 and the limit switch 21 causes the rack to move. When a control unit 22 for detecting the logical product of detecting the movement completion of 12 is provided and the detection signal of the control unit 22 is set as the opening / closing completion signal A,
The closure completion state of the container valve 1 can be detected more accurately, and safety is improved.

The above embodiment is not limited to the filling device in which the clerk manually attaches and detaches the filling nozzle 5, and in particular, is adopted in the automatic filling device which automatically attaches or detaches the filling nozzle 5 automatically. The filling operation can be made reliable, and improvement in safety can be expected.

In the above embodiment, the first gear 9 is attached to the support shaft 8
The support shaft 8 and the first gear 9 are formed by fitting the key and the key groove 18 in order to make them slidable in the axial direction of the first gear. 9 can achieve smoother sliding.

[0025]

According to the first aspect of the present invention, the clamp portion that engages with the handle of the container valve and the support shaft of the clamp portion are slidable in the axial direction of the support shaft and integrated with the support shaft. Drive a first gear that rotates in a direction, an urging unit that urges the first gear toward one side in the axial direction, a second gear that meshes with the first gear, and a second gear. And a rotary drive source for forming the tooth of the first gear in an inclined straight line, and the first gear moves to the other on the support shaft against the bias of the biasing means. Since the first detecting means for detecting the fact is provided, when the completely closed state is reached, the rotation of the clamp part is stopped by the handle, and the second shaft is driven by the support shaft and the rotary drive source whose rotation is stopped. The first gear, which is interposed between the gear and the gear, supports the first gear against the bias of the biasing means. Component force in the direction of sliding against acts on inclined teeth, the first gear is moved. The first detection means can detect the movement of the first gear to detect the state where the container valve is in a completely closed state, and the liquefied gas filled can be removed even if the filling valve is removed from the container valve. It does not blow out and is safe.

According to the structure of claim 2, the rotary drive source in claim 1 is composed of a rack that meshes with the second gear and a cylinder device that drives this rack, and the rack moves by a specified amount. Second detecting means for detecting the fact that the first detecting means has moved against the bias of the biasing means, and the second detecting means has moved the rack by a prescribed amount. Since the control unit for detecting the logical product that detects the above is provided, by using the output signal of the control unit as the opening / closing completion signal, only one of the detection output of the first detection unit and the detection output of the second detection unit is obtained. Since an open / close completion signal is not generated in the system and safety is further improved, the filling operation can be ensured by adopting an automatic filling device that automatically attaches or detaches the filling nozzle. Yes, improved safety It can be expected.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of a liquefied gas filling container valve opening / closing device of the present invention during closure.

FIG. 2 is a process diagram before mounting the container valve on the apparatus.

FIG. 3 is an operation explanatory view of the same device in a state where the closure is completed.

FIG. 4 is an explanatory view of a conventional liquefied gas filling container valve opening / closing device.

[Explanation of symbols]

 1 Container Valve 2 Handle 3 Clamping Part 5 Filling Valve 6 Liquefied Gas Filling Container Valve Opening / Closing Device 7 Liquefied Gas Filling Container 8 Support Shaft 9 1st Gear 10 2nd Gear 11 Rotation Drive Source 12 Rack 13 Cylinder Device 18 Keyway 19 Compression spring [urging means] 20 Limit switch [first detecting means] 21 Limit switch [second detecting means] 22 Control unit A Closing completion signal B Inclined tooth of the first gear

Claims (2)

[Claims] 1. A clamp part which engages with a handle of a container valve, and a first gear which is slidable with respect to a support shaft of the clamp part in the axial direction of the support shaft and rotates integrally with the support shaft. An urging means that urges the first gear toward one side in the axial direction, a second gear that meshes with the first gear, and a rotary drive source that drives the second gear. First detecting means for forming the tooth of the first gear in an inclined straight line and detecting that the first gear moves to the other side on the support shaft against the bias of the biasing means. Liquefied gas filling container valve opening and closing device. 2. A second detection means comprising a rotary drive source comprising a rack that meshes with a second gear and a cylinder device that drives this rack, and that detects that the rack has moved by a specified amount. A control unit is provided which detects a logical product obtained by detecting that the first detecting means has moved against the bias of the biasing means and detecting that the second detecting means has moved the rack by a specified amount. The liquefied gas filling container valve opening / closing device according to claim 1, wherein the liquefied gas filling container valve opening / closing device is provided and the detection signal of the control unit is used as an opening / closing completion signal.