JPS6143013Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is attached to a gas cylinder to close the open valve of a gas cylinder such as fuel propane gas by the contracting force of a spring in the event of a strong earthquake or gas leak. This invention relates to an auxiliary tool for an emergency valve closing device for a gas cylinder valve, which can be easily opened by turning the valve while extending a spring.

Usually, there is a handle on the top of the gas cylinder that you turn to open and close the valve, and when this handle is not connected to an emergency stop device, you can open or close the valve by turning it without requiring much force. can. However, when the handle is connected to an emergency valve-closing device, closing the valve that is open in an emergency does not require human intervention because the handle is automatically turned by the contraction force of the spring built into the emergency valve-closing device, but it is dangerous. To open a closed valve, the spring must be stretched and the handle must be turned against the spring to store force in preparation for the next emergency. In short, if the spring force is strong, it may be difficult for housewives to turn it.

Therefore, the present invention makes it possible to rotate a rotating body equipped with a member that is removably connected to the handle of the gas cylinder and a cam around which a wire is wound around an operating shaft, and also to attach it to the gas cylinder, thereby making it possible to use the emergency valve closing device. A wire connected to a spring is wound around the cam, and in case of an emergency, the spring's contracting force is used to turn the handle of the gas cylinder in one direction via the rotating body to close the gas cylinder valve, and when the danger has passed, or When opening the gas cylinder valve when the device is first installed on the gas cylinder, manually operate the operating shaft to turn the rotating body in the opposite direction, and then pull and wind the wire around the cam while simultaneously reversing the cylinder handle. In this case, the shape of the cam reduces the force required for turning the cam.Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

In Figures 1 and 2, 1 is the actual application filed by the applicant in 1983-7252.
This is a gas emergency valve closing device proposed in U.S. Pat. Since gas cylinders are usually installed outdoors, the emergency stop device has a case 1' that is fixed to the outside wall of the building, and inside the case 1' there is a coil spring 2 that expands and contracts along a fixed column in the vertical direction. is fixed at its upper end to the upper end of the column. An actuating piece 3 having a claw 3a at the tip is pivotally attached to the lower end of the column, and the coil spring can be extended downward and its lower end hooked onto the claw 3a to make it in an extended state. A wire 4 is connected to the lower end of the coil spring, and the wire goes out of the case, and the other end is connected to a city gas main valve or a gas cylinder. In addition, inside the case is an operating rod 5 having a weight 5a at the upper end.
There is a solenoid 7 that is electrically connected to a gas leak detector 6 in the building, and a notch 5b is provided at the lower end of the operating rod, and by hooking this notch to the edge of the hole 1a at the bottom of the case. It is independent in the case, and when the solenoid 7 is energized, the release piece 7'
and remove the notch 5b of the operating rod from the hole 1a.

When there is a strong earthquake, the vibration can cause the notch in the operating rod 5
b comes off the edge of the hole, and when the gas leak detector 6 detects a gas leak, the solenoid 7 is energized and the release piece 7' is pushed to remove the notch of the actuating piece from the edge of the hole, so it is activated in either case. The rod 5 descends through the hole 1a, and at this time, the weight 5a pushes the swinging mallet rod 8 from the side and removes the retaining rod 9 of the actuating piece 3 from the actuating piece 3, so the coil spring 2 swings the actuating piece. and contract upwards,
The wire 4 is pulled by this force to close the gas main valve or gas cylinder valve.

Note that the handle of the gas cylinder is usually turned in a horizontal plane, so the wire 4 is passed through the flexible tube 10 and guided horizontally toward the gas cylinder (first
figure). The gas emergency valve closing device is not limited to the above-mentioned one, but basically has a structure in which the wire 4 is pulled by the contraction force of a built-in spring that has been stretched and stored force in the event of an emergency such as an earthquake or gas leak. Good to have.

Now, the auxiliary device of the present invention has a mounting board 11 for removably fixing it to the gas cylinder B. The mounting board 11 here has an inverted L-shape with a horizontal piece 11b at the upper end of the vertical piece 11a, and a nearly U-shape at the bottom of the outer surface of the vertical piece, with both sides fixed to the vertical piece and a space between the horizontal piece 11b and the vertical piece. Auxiliary plate 1 that maintains an open interval in the vertical direction
2, and the vertical piece and auxiliary plate have a cut 1 from the bottom edge.
1' and 12' are formed. This is to attach the mounting board 11 to the horizontal connecting cylinder 14 which protrudes almost horizontally from the upper end of the gas cylinder and connects the gas pipe 13. Therefore, the width of the cuts 11' and 12' is the same as that of the connecting cylinder 14. The distance between the vertical piece and the auxiliary plate is set to match the thickness of the brim-like enlarged part 14' on the connecting cylinder, and the width of the auxiliary plate is made slightly larger than the diameter of the enlarged part. As a result, the notches 11' and 12' are pressed onto the connecting cylinder 14 from above so that the enlarged part 14' is inserted into the space between the vertical piece and the auxiliary plate, and the mounting board is fixed to the gas cylinder, and the horizontal piece 11b is attached to the valve of the cylinder. handle 15
Can be placed horizontally above. Of course, the attachment to the cylinder is not limited to this, for example, arc-shaped walls or the like are hung from both sides of the horizontal piece 11b facing each other, and both arc-shaped walls are tightened around the neck b' of the cylinder to fix it in a non-rotatable manner. be able to.

An operating shaft 16 having an operating piece similar to the handle at its upper end is rotatably supported on the horizontal piece 11b at a position concentric with the handle 15, and two upper and lower discs 17 and 18 are mounted at the lower end of the operating shaft 16. A rotary body 20 is fixed with the cam 19 sandwiched therebetween, and the protrusion 4' at the tip of the wire 4 of the emergency valve closing device is received in the notches 17' and 18' of both discs, and the wire 4 is connected to the cam 19. At the same time, several pins 21, four in this case, protrude downward from the periphery of the lower surface of the lower disc 18, and engage with the recess 15' around the handle of the valve of the gas cylinder. This is a gripping device that grips the handle.

Here, the lower part of the operating shaft that protrudes downward from the lower surface of the horizontal piece has a non-circular cross section, such as an oval shape, and holes of the same shape are drilled in both discs 17, 18 and the cam 19, and the cam 19 is fitted into the operating shaft from the lower end. It is tightened with a screw to the shoulder at the boundary between the circular cross section and the non-circular cross section of the operating shaft. Of the four pins 21, two pins 21a are located outside the circumferential surface of the cam around which the wire is wound.
The upper end of 21a is fixed to the lower disc by caulking etc. so that it does not prevent the cam from wrapping the wire around the circumference, and one of the remaining two wires, 21b, passes through the cam and attaches to the upper disc. The upper end of the other wire 21c is fixed to the upper disk with its upper end facing the circumferential surface of the cam near the position where the protrusion 4' at the tip of the wire is fixed, and the wire is fixed to the circumferential surface of the cam. Sandwiched between. Then, the tip of the tube 10 is connected to the upper part of the vertical piece 11a,
The wire protruding from the tip of the tube slips through,
Hole 22 for fixing the protrusion 4' at the tip to the upper and lower discs
will be established.

FIG. 5 shows the shape of the cam 19, the arrangement of the four pins 21 and holes 22, and the state of the tip of the wire 4 when the gas cylinder valve is closed.
To open the valve of the gas cylinder, the disks 17, 18 and cam 19 are rotated counterclockwise as shown by the arrow, using the operating piece 16' at the upper end of the operating shaft 16. First, the wire 4 comes out from the hole 22 and is held between the circumferential surface of the cam 19 by the pin 21c, and then the protrusion 4' at the tip is cut out into the notches 17' and 18'.
be kept inside. The cam 19 has a peripheral edge 19a farthest from the axis of the operating shaft 16 near the pin 21c, and from there it gradually approaches the axis of the operating shaft in a clockwise direction opposite to the direction in which the valve is turned to open the valve. It has a spiral peripheral surface portion 19b having a spiral curve shape. In this example, the amount of rotation to open and close the valve of the gas cylinder is approximately
Since the angle is 180°, the length of the vortex peripheral surface portion 19b is approximately half a circumference, and this length is determined according to the amount of rotation for opening and closing the valve.

The wire 4 and cam 19 shown in solid lines in FIG. 5 are in the valve closed position, and the chain lines are shown in the open valve position.

To open a closed valve, turn the operating shaft 16 by hand in the direction of the arrow. When the valve is closed, the spring pulling the wire 4 is relatively loose, so the reaction force is weak. Therefore, the cam 19 rotates together with the shaft 16, and the shaft 1
Even under unfavorable conditions, winding the wire 4 by the cam peripheral edge 19a remote from the cam 6 does not require much force.
Then, as the spring reaction force gradually becomes stronger, the wire 4 is wound around a portion of the cam peripheral portion 19b that is relatively close to the shaft 16, so the arm of the reaction force contracts and the torque to be turned by hand increases. do not. When the spring is pulled and the valve opens, the lower end of the spring of the above-mentioned emergency valve closing device is caught by the claw 3a at the tip of the actuating piece 3, which is engaged by the retaining rod 9, so that the spring maintains its extended state. When the wire 4 is pulled by the spring due to an emergency while the gas appliance is in use with the valve thus opened, the wire at the chain line position in the figure turns the cam 19. At first, the rotational driving torque of the shaft 16 due to wire traction is relatively small because the distance between the arm, that is, the shaft 16 and the periphery of the cam, is small, but as the shaft 16 and the cam rotate, the distance increases.
In other words, the torque arm of the wire pulling force increases, and the valve reaches the valve closing position shown by the solid line, where the valve is completely closed with the maximum force.

Note that when you open the valve by turning the operating shaft by hand, you can feel that the tip (lower end) of the spring is caught in the claw 3a of the operating rod, so this is not necessarily necessary.
If necessary, the upper surface of the upper disk 17 and the horizontal piece 11b
Stopper 23 that collides with the bottom surface of the valve when the valve opens
a, 23b may be provided so that when the stopper 23a hits 23b, it cannot be turned any further in the opening direction, and at the same time, the stopper 23a may be made to make contact with the sound or feel of the contact.

Thus, according to the present invention, a valve that has been closed by the contraction force of the spring can be opened by rotating the handle 15 via the operating shaft with a relatively small torque while extending the spring.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of an emergency valve closing device connected to a gas cylinder valve, Figure 2 is an enlarged partially cutaway view of an example of an emergency valve closing device, and Figure 3 is a supplement to this proposal. A side view with a part of the tool in cross section, Figure 4 is an explanatory diagram of the gripping device, and Figure 5 is a cross-sectional view of the main part. In the figure, 2 is the spring of the emergency valve closing device, and 4 is the same wire. , 11 is a mounting board, 15 is a cylinder valve handle, 16 is an operating shaft, 17 and 18 are disks, 19 is a cam, 20 is a rotating body, and 21 is a pin constituting a gripping device.

Claims (1)

[Claims for Utility Model Registration] A spring that is connected via a wire to a rotatable handle that opens and closes the valve of a gas cylinder, and that is expanded when the handle opens the valve of the gas cylinder, and a rocker that maintains the spring in the expanded state. It has a movable actuating device and a release device that detects an earthquake or a gas leak and swings the actuating device to release the spring from being in an extended state. An auxiliary tool for an emergency valve closing device for a gas cylinder valve that closes the gas cylinder valve by pulling the handle in the reverse direction, the device comprising: a removable mounting board that can be fixed to the gas cylinder; and a rotatable support on the mounting board. an operating shaft having an operating piece at the upper end, and a cam sandwiched between two disks, which is integrally fixed to the lower end of the operating shaft, and an end opposite to the end connected to the spring of the wire. and a rotating body that wraps the wire around the circumferential surface of the cam when opening the valve of the gas cylinder; A gripping device is provided for gripping the handle, and the cam is located at the peripheral edge 19a furthest from the axis of the operating shaft for contacting the wire when the valve is closed.
and an emergency closing of a valve of a gas cylinder characterized by having a vortex peripheral part 19b that continues to the peripheral part 19a in a direction opposite to the direction in which the valve is turned to open the valve and gradually approaches the axis of the operating shaft. Auxiliary equipment for valve equipment.