JPS6215577Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating device for a valve such as a lift valve that opens and closes by sliding in the axial direction, and particularly to a push-turn operating device.

A known operating device of this type is the one described in Japanese Utility Model Publication No. 16662/1983, which has a lift valve built into the gas tank, and the operating shaft 2 that rotates the closure 1 is pushed and turned. A cam cylinder 6 in which a valve body 3 that moves up and down integrally with the valve body 3 is provided in a passage hole 4 in the closure 1, and protrusions 5, 5 protruding from the operating shaft 2 are externally fitted and fixed to the operating shaft. When the operation shaft 2 is in the fully open position and the fully closed position, the projecting pieces 5, 5 are connected to the cam cylinder 6.
The valve body 3 is held in an open state in alignment with the first and second vertical grooves 7 and 8 formed in the valve body, and in this intermediate position,
The valve body 3 is held in a pressed state by a tongue piece 9 connecting between the first and second vertical grooves 7 and 8, and the valve body 3 is held in a closed state by the pushing of the operating shaft 2. (Fig. 1, Fig. 2) With this conventional device, when opening the gas kettle, the operating shaft 2 has to be rotated while being pushed in, so it has the advantage of preventing the gas kok from being opened by mischief. However, the same pushing and turning operation is necessary to close the gas kottok. Therefore, there is a drawback that a quick closing operation cannot be performed in an emergency.

The present invention allows the operation shaft or the lifting member that rotates together with the operation shaft to return and rotate in a path different from the opening operation path, so that the operation shaft can be operated without pushing the operation shaft.
The purpose is to enable the gas tank to be rotated back as it is and to be able to close the gas tank quickly in an emergency.

The technical means for achieving the above purpose is to provide the operating shaft with a protruding piece that protrudes perpendicularly to its axis, and attach a valve body that is installed in the flow path within the main body and closes at both the upper and lower end positions in the normally closed upward direction. The head of the valve shaft of the valve body is brought into contact with the operating shaft so as to be raised and lowered integrally with the operating shaft, and a movement path regulating means is provided on a cam cylinder fitted externally on the operating shaft and is opposed to the protruding piece. The path regulating means includes a first vertical movement allowing part whose protrusions coincide with each other when the closing member is in the fully closed position, a first lateral movement allowing part in the opening direction following the lower end thereof, and a closing member following the first lateral movement allowing part. a second vertical movement allowance part in which the protrusions coincide at the fully open position; a second lateral movement allowance part in the return direction within a minute range following this second vertical movement allowance part; and a second lateral movement allowance part following this second lateral movement allowance part. It consists of a third vertical movement allowance part or diagonal movement allowance part facing upward, and a third lateral movement allowance part in the closing direction that connects the upper end of this movement allowance part to the upper end of the first vertical movement allowance part. The projecting piece is configured to move within a closed locus along the movement path regulating means, and includes a movement path from the first lateral movement permission part to the second vertical movement permission part and from the third lateral movement permission part to the first lateral movement permission part. A reverse movement blocker part is provided in the movement path of the vertical movement permission part, and the upper end of the second vertical movement permission part is set at a height midway between the first vertical movement permission part.

According to the above technical means, when the operating shaft is in the fully closed position, the protruding piece is aligned with the first vertical movement allowing part, the valve body is lifted by the spring and comes into contact with the valve seat, and together with the closure, the flow path in the main body is is closed.

Next, when the operating shaft is pushed in and rotated to the fully open position, the protruding piece moves from the lower end of the first vertical movement allowance part to the first
The valve body moves along the lateral movement allowing portion and is maintained in contact with the other valve seat to close the flow path within the main body. When the fully closed position is reached, the protruding piece rises in line with the second vertical movement permitting part, and the protruding piece abuts the upper end of the second vertical movement permitting part, and the valve body is positioned between the two opposing valve seats. position and held in the open state. In other words, the gas tank is opened. At this time, the protrusion passes through the reverse movement prevention part and is prevented from descending from this position.

To close the gas tank, simply rotate the operating shaft in the fully closed direction. By this operation, the protruding piece is moved from the upper end position of the second vertical movement allowance part, through the second lateral movement allowance part, to the third vertical movement allowance part or the diagonal movement allowance part, and is moved by the upward biasing force applied to the valve body. The protruding piece rises together with the operation shaft, the protruding piece moves to the upper end of the third vertical movement allowance part or the diagonal movement allowance part, and the protrusion piece returns and rotates along the subsequent third horizontal movement allowance part. On the way, the protruding piece passes through the reverse movement preventing part and returns to the first vertical movement allowing part. During this time, the valve body closes the upper valve seat, and even if the closure is placed in the intermediate position, the gas tank remains closed. Furthermore, at the time when the protruding piece returns to the first vertical movement allowing part, the protruding piece is in a position beyond the reverse movement preventing part of the third lateral movement allowing part, so the operating shaft changes from the fully closed position of the operating shaft. When the operating shaft is rotated open without being pushed in, the opening rotation of the operating shaft is prevented by the one-way clutch action of the reverse movement prevention portion and the protrusion.

As described above, according to the above means, when the operating shaft returns from the fully open position, if the operating shaft is returned to its original position without being pushed in, the protrusion passes through a different path from the opening rotation, and returns to the initial position. Moreover, the opening movement from the initial position requires a pushing operation.

Since the present invention has the above configuration, it has the following unique effects.

Since the operation shaft can be rotated back without having to be pushed in, the gas tank can be closed quickly in an emergency.

Since the valve body is fully closed when the operating shaft rotates within a minute range from fully open, that is, until the protrusion comes off the second vertical movement allowable part, the closing position is fully open in terms of flow rate. Since the valve body is fully closed while the valve is in the position, no matter what state the operating shaft is in, the flow path inside the main body is in a flow-restricted state, which prevents the inconvenience of leaving the valve body in a half-open state. .

As a configuration in which the operation shaft is rotated back from the fully open position as it is, one side of the second vertical groove (the first vertical groove side) in the conventional example described above is used as a cam slope, and the cam between the cam slope and the protrusion A configuration in which the protruding piece is pushed in by a pair when the operating shaft is rotated back is also considered, but in this case, there is a risk that the valve body may be left in a half-open state due to the frictional resistance between the cam slope and the protruding piece. However, according to the above configuration of the present invention, there is no such concern.

Furthermore, in the above configuration, since the reverse movement prevention part is provided in the movement path from the first lateral movement allowance part to the second vertical movement allowance part, when the operation shaft is in the fully open position, it cannot be pushed in and operated. This means that depending on the operation, the flow path cannot be left in an incompletely open state. Therefore, inconveniences caused by incomplete opening can be completely prevented.

Hereinafter, an embodiment of the present invention will be described based on the drawings. In this embodiment, as shown in FIG. An overflow prevention valve 11 is further disposed on the lower upstream side of the empty chamber, and the valve body 3, which moves up and down integrally with the operating shaft 2, is located in the empty chamber and closes the closing hole 4 of the closing member 1. Valve seat 12 formed at the lower end
and the valve seat opening 13 of the overflow prevention valve 11, and is biased upward by a spring 16 interposed between the head 15 of the valve shaft 14 and the upper end of the closure 1. It is in contact with the upper valve seat 12.

Next, in this embodiment, the above-mentioned protruding pieces are formed into a pair of pins 17 inserted orthogonally through the lower end of the operating shaft 2, and in order to apply an advancing force of these pins into the operating shaft. A compression spring 18 is inserted to allow these pins to move forward and backward and bias them in the advancing direction, further regulating the most advanced position. Further, the pin fits into a slit formed in the cylindrical shaft of the closure 1, and the operating shaft 2 and the closure 1 are engaged with each other.

The cam cylinder 6 is constructed separately from the main body 36, and each vertical movement permitting portion is a vertical groove, and each lateral movement permitting portion is a horizontal groove, and a first cam groove A and a second cam consisting of the vertical grooves and the horizontal grooves are formed. Grooves B are formed in the body of the cam cylinder 6, and the tips of the pins 17 fit into and engage with the respective grooves, and these cam grooves serve as movement path regulating means. Also, the first
The distance between the vertical groove 7 and the second vertical groove 8 is set at 90 degrees, and a horizontal groove-shaped portion 20 is provided from the lower end of the first vertical groove 7 to the second vertical groove 8 side, and the horizontal groove of one first cam groove The rotation range of the pin 17 is restricted to 90 degrees by the shaped portion, thereby restricting the rotation angle of the operating shaft 2, that is, the closure 1 to 90 degrees (Figures 4 and 5). The axial depths of the first vertical groove 7 and the second vertical groove 8 are set appropriately in advance. The second vertical groove 8 is configured to have an appropriate gap between the first cam groove and the upper end of the second vertical groove, and the second vertical groove 8 is connected to the first vertical groove in order to hold the valve body 3 at an intermediate position between the valve seats 12 and 23. 7, and on the other hand, the second cam groove B of the second cam groove B
The vertical groove 8 is formed above the horizontal groove-like part 20, and its lower end becomes a first step part 21, and the horizontal groove-like part 20
and the second longitudinal groove 8 are connected via an inclined surface 22.

Further, a second step portion 24 is formed below the movement path 23 of the pin 17 in the closing direction of the second cam groove B, and between the movement path and the first longitudinal groove 7, the first longitudinal groove side is vertically Mountain part 2 with a sawtooth cross section where one side is a plane and the other side is an inclined plane
5, and on the other hand, the upper part of the second longitudinal groove 8 of the first cam groove A and the upper part of the first longitudinal groove 7 have the second longitudinal groove side facing the inclined surface 2.
6 and a flat chevron portion 27 with the other side being a vertical surface. Further, the second longitudinal groove 8 and the inclined surface 26 are provided adjacent to each other, and the upper end side portion of the second longitudinal groove 8 is opened to the inclined surface 26 side and is in a communicating state. This communicating portion corresponds to the second lateral movement allowing portion described in the above-mentioned technical means.

In the above embodiment, the tip of one pin 17 is moved from the first vertical groove 7 of the first cam groove A to
The tip of the other pin 17 moves along the closed path of the horizontal groove 20 → second vertical groove 8 → chevron 27 → first vertical groove 7, and the tip of the other pin 17 moves along the closed path of the horizontal groove 20 → second vertical groove 8 → chevron 27 → first vertical groove 7 Part 20
→ Inclined surface 22 → second vertical groove 8 → moving path 2 in the closing direction
3 → mountain part 25 → the closed path of the first longitudinal groove 7, and only at the fully open position of the kettle, the flow path in the kettle main body becomes fully open, and at other positions, the flow path is reliably blocked. In addition, in the closing rotation range of the operating shaft, the pushing operation of the operating shaft is impossible in the entire region, and an incomplete opening state due to the operation of the operating shaft can be reliably prevented.

Next, in the embodiment shown in FIG. 6, a pin 17 serving as a projecting piece is fixedly protruded from the operating shaft 2, and the movement path regulating means is formed by a combination of vertical grooves and horizontal grooves as in the above embodiment. a retractable first mountain portion which is biased in the advancing direction during the movement path from the first lateral groove 30 corresponding to the first lateral movement permitting portion to the second vertical groove 8 corresponding to the second vertical movement permitting portion; 31 is a retractable second mountain part which is biased in the advancing direction during the movement path from the third lateral groove 32 corresponding to the third lateral movement allowance part to the first vertical groove 7 corresponding to the first vertical movement allowance part. 33, respectively. Further, a third vertical groove 35 is provided in a portion adjacent to the second vertical groove 8, and the upper end side of the second vertical groove 8 is open and communicated with the lower end side of the third vertical groove 35. There is. In this embodiment, the communication section corresponds to the second lateral movement allowing section described in the technical means described above.

Also, in this case, it works in the same way as in the above embodiment,
Has a similar effect.

Incidentally, the first ridge portion 31 or the second ridge portion 33 is constructed separately from the cam cylinder 6 as shown in FIG.
If a spring 34 is interposed between 0 and 0, the above-mentioned advance biasing force is applied.

Further, the pin 17 and the movement path regulating means made of a combination of the above-mentioned vertical grooves and horizontal grooves may be combined in one set or in two sets.

Furthermore, in the case of the above embodiment, the third vertical groove 35 corresponding to the third vertical movement allowing portion may be an oblique groove that is inclined in the return rotation direction (the closing rotation direction of the closing member), In this case, the closing rotation of the operating shaft becomes smooth. In addition, if a reverse movement prevention part similar to the second mountain part 31 is provided at the upper part of the third vertical groove 35 or the diagonal groove, when the valve body 3 rises and once the valve is closed, the closing rotation of the closing element will occur. Opening the valve mid-way can also be prevented.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the conventional example, Fig. 2 is a perspective view of the main parts, Fig. 3 is a sectional view of the embodiment of the present invention, and Fig. 4 is an exploded perspective view of the cam cylinder and operating shaft used in this. Fifth
The figure is a perspective view from the direction showing the first cam groove of the cam cylinder, FIG. 6 is a cutaway perspective view of the cam cylinder of another embodiment,
FIG. 7 is a sectional view taken along the line X-X of the main parts, and in the figure, 3...valve body, 6...cam cylinder, 7...first vertical groove corresponding to the first vertical movement permitting part, 8... 2. Second vertical groove corresponding to the vertical movement permitting part, 17... Pin corresponding to the projecting piece, 20... Horizontal groove-like part, 25... Mountain part corresponding to the reverse movement preventing part.

Claims (1)

[Scope of utility model registration request] The operating shaft is provided with a protruding piece that protrudes in a direction perpendicular to its axis, which biases the valve element that is provided in the flow path within the main body and closes at both the upper and lower end positions in a normally closed upward direction, and the valve stem head of the valve element. is brought into contact with the operating shaft so as to be raised and lowered integrally with the operating shaft, and a cam cylinder fitted onto the operating shaft is provided with a moving path regulating means that is opposed to the protruding piece, and the moving route regulating means is set in the fully closed position of the shutter. A first vertical movement permitting portion with which the protrusions coincide, a first lateral movement permitting portion in the opening direction following the lower end thereof, and a second horizontal movement permitting portion with which the protrusions coincide at the fully open position of the closure following the first lateral movement permitting portion. The vertical movement allowance part and this second
a second lateral movement allowance part in the return direction within a minute range following the vertical movement allowance part; a third vertical movement allowance part or diagonal movement allowance part which follows the second lateral movement allowance part and faces upward therefrom; and this movement allowance part. and a third lateral movement allowance part in the closing direction connecting the upper end of the part and the upper end of the first vertical movement allowance part, so that the protrusion of the operation shaft moves within a closed trajectory along the movement path regulating means. The first
A reverse movement prevention part is provided in the movement path from the lateral movement permission part to the second vertical movement permission part and in the movement path from the third lateral movement permission part to the first vertical movement permission part, and the upper end of the second vertical movement permission part is A valve operating device set at a height midway through the first vertical movement allowable section.