JPS5916155B2 - Gaskotsk - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that is used in various gas appliances and has a push-turn type ignition function that advances and retreats the operating shaft at the rotating end, and that prevents raw gas from flowing out due to malfunction. This provides a gas cock that is extremely easy to operate and precisely operated.

Traditionally, it was introduced in 1937 as a device to prevent incorrect operation of the gas cock.
In the gas cock disclosed in Utility Model Application Publication No. 50334 in 2003, a protruding piece is provided on the operating shaft, a regulating hole is bored around the through hole in the support plate, and the operating shaft is pushed down in the closed position to release the protruding piece. Pass through the regulation hole and rotate counterclockwise until the igniter is activated.
The projecting piece is made to be able to engage with the back surface of the support plate, and when the opening degree of the closing member is adjusted by reverse rotation of the operating shaft at the ignition rotation end, the reverse rotation is prevented in the suppressed state. In order to prevent the pilot valve from opening again and raw gas flowing out, an abbreviation-shaped regulation plate is always urged inward by a spring, and the tip of the control plate is attached to the operating shaft. Since it is provided with a structure that prevents reverse rotation of the operating shaft by abutting and engaging the plate,
The structure is extremely complicated, and it is difficult to determine the positional relationship between the regulating plate and the actuating plate. Therefore, processing and assembly are not easy. Moreover, the length of the regulating plate is large, requiring a large space. The structure is such that a safety pin is fixed to a spring plate separately provided on the support plate, and this safety pin is engaged with a notch in the cam plate, which makes the structure even more complicated and has drawbacks such as difficulty in positioning and assembling it. .

This invention eliminates the drawbacks of the conventional gas cock as described above, and the specific invention is to return the operating shaft and urge it upward with a spring to operate the through hole through which the holding pin protruding and fixed to the operating shaft passes. A pilot valve is drilled in the mounting plate across the angular positions of the rotation start and end of the shaft, and is energized by the return spring to close the pilot valve installed in the through hole of the closure that rotates with the operating shaft. Then, by pressing the operating shaft against the spring, the holding pin is rotated directly under the mounting plate to prevent the operating shaft from returning within the angular range of the through hole, and a rotation regulating pin is attached to the operating shaft. The projecting part is made to face the cam surface of the first cam body which is slidable in the axial direction and whose rotation is restricted, and the projecting part is fitted and engaged in the groove of the cam surface. Since the positional relationship in the axial direction is reliably determined by the return spring, the engagement between the two is accurate and the positional relationship between the two can be determined easily, and processing and assembly work is extremely easy. In the invention, a second cam body that prevents rotation at the rotation start end is inserted and attached concentrically with the first cam body so that it can engage with the protruding portion of the rotation regulating pin, and the engagement is performed on the shaft. The return spring is firmly fixed in the direction, and all the components are compact.
This relates to a gas cock that is easy to assemble.

An embodiment of the present invention will be described below based on the drawings.

In the drawings, reference numeral 1 denotes an operating shaft rotatably and slidably inserted into the device body A. A cylindrical body 1a is formed at the tip of the operating shaft 1, and a locking protrusion for a closure 2, which will be described later, is formed at the tip of the cylindrical body 1a. Engagement grooves 4, 4' are bored into which the parts 3, 3' are fitted and engaged.

Further, a return spring 5 is interposed between the cylindrical body 1a and the closure 2 to urge the operating shaft 1 upward and to urge the closure 2 downward.

Reference numeral 6 denotes a rotation range regulating pin (hereinafter simply referred to as pin 6) inserted and fixed into the base end of the cylindrical body 1a.

) of both end protrusions 6a, 6a' (hereinafter simply protrusions 6a, 6
Say a'.

) are positioned facing the cam surfaces to engage with cam surfaces 8, 8' of the first cam body 7, which will be described later.

Reference numeral 7 denotes a cylindrical first cam body fitted into the housing part 9 of the container A, and projections 10 and 1 formed on the outer circumference of the first cam body 7 are provided.
0' are fitted into locking grooves 11 and 11' formed in the container body A, and the first cam body 7 is inserted into the container body A so as to be prevented from rotating and to be slidable only in the axial direction. A return spring 12 is inserted between the container A and the container A, and is biased upward.

8.8' is a cam surface carved downward from the upper end of the inner periphery of the first cam body 7, and is a protruding portion 6a of the pin 6;

The grooves 13 and 13' into which the grooves 6a' fit and the grooves 13°1
3' and continuous downward slope slopes 14, 14'.

The bottom surfaces of the grooves 13 and 13' and the lowest parts 15 and 15' of the inclined surfaces 14 and 14' are located at approximately the same depth,
The inclined surfaces 14 and 14' of 3 and 13' are continuous over a range of about 90 degrees.

The cam surfaces 8, 8', which are composed of the grooves 13, 13' and the inclined surfaces 14, 14', are provided at opposing positions (180 degree angle positions).

Therefore, both end surfaces 8a and 8a' of the cam surfaces 8 and 8'
, 15a, 15a', that is, the grooves 13, 1
3' outer end surfaces 8a, 8a' and the lowest part 15 of the inclined surface,
Continuing to 15', the rotation range of the pin 60 is restricted by the end faces 15a and 15a'.

Further, when the pin 6 is located at the lowest part 15, 15' of the inclined surface, the operating shaft 1 is at the rotation start position, and the concave grooves 13, 13
When located at ', the operating shaft 1 is located at the end of rotation, and rotation in both left and right directions is stopped at that position.

The tops of the sloped surfaces 14 and 14' have a small distance from the upper end surface of the first cam body 7, and the pin 6 is connected to the sloped surfaces 14 and 14'.
It is possible to pass laterally above the top of 4'.

16 and 16'□ are through holes bored in the mounting plate 17 fixed to the device body A so as to be continuous with the insertion hole 18 of the operation shaft 1;
Reference numerals 9 and 19' denote through holes that are bored to intersect with the through holes 16 and 16', and are slightly shorter than the through holes 16 and 16'. Holding pins 20 that are inserted and fixed in a protruding manner are inserted into the through holes 16 , 16 ′ and 19 , 1 at the rotation start and rotation end positions of the operation shaft 1 .
It is possible to pass through 9'.

Further, protrusions 22, 22' of the second cam body 21, which will be described later, can be fitted into the outside of the through holes 16, 16', and when the operating shaft 1 is at the rotation start position, the protrusions 22, 22' are fitted into the through holes 16 and 16' to prevent their rotation.

Reference numeral 21 denotes a short cylindrical second cam body that is fitted into the first cam body 7 so that it can rotate and slide freely, and the second cam body 21 has protrusions 22 and 22' formed on its upper end surface. and the projections 22,2
The recessed step portions 23, 23' and the recessed groove 24° 24' into which the pin 6 can be fitted are continuously carved over an angular range of approximately 90 degrees from a position spaced apart from the recessed groove 24, 2'. 24' is formed so as to be in contact with the protrusions 22, 22'.

Here, the concave groove 24°24' and the protrusions 22, 22' are the first
The positional relationship is the same as the horizontal positional relationship between the grooves 13, 13' of the cam surfaces 8, 8' in the cam body 7 and the inclined surfaces 14°14'.

Note that one protrusion 22 and groove 24 and the other protrusion 22
' and the groove 24' are formed at opposing positions (180 degree angle positions).

The second cam body 21 is urged upward by the force of the return spring 250.

2 is a closure inserted into the lower part of the container body A. A through hole 26 is bored in the center of the lower end of the closure 2, and a through hole a which is approximately perpendicular to the through hole 26 is communicated with the through hole a. A series of pilot holes are installed,
Furthermore, a pilot passage 30 is passed through the upper part thereof in a substantially right angle direction.

Further, locking protrusions 3, 3' are formed on the upper part of the closure 2, and the protrusions 3, 3' are fitted into engagement grooves 4, 4' formed at the tip of the cylindrical portion 1a of the operating shaft 10. The operating shaft 1 is connected to the closure 2 so that it can slide only in the axial direction.

Reference numeral 27 denotes a pilot valve installed in the through hole 26. A valve stem 28 of the pilot valve 27 is projected from the upper part of the closure 2, and the through hole 26 and the pilot passage 30 are communicated through the loose fitting gap 29. There is.

Further, the pilot valve 27 is always urged in the closing direction by the elastic force of the return spring 320 inserted between the flange portion 31 of the valve stem 28 of the pilot valve 27 and the closure 20.

33 is a gas inlet, 34 is a gas outlet to the main burner, 3
5 is a gas outlet to the pilot burner, 36 is an operation handle,
37 is a hammer pin (not shown) of a piezoelectric ignition device (not shown).
This cam plate 37 is attached to the operating shaft 1 with a certain play and is urged upward by the spring 38, and rotates together with the operating shaft 1 to ignite the piezoelectric ignition. It is what operates the device.

Next, the operation will be explained. First, when the operating shaft 1 is pushed down and moved forward by a certain distance, the holding pin 20 is in a position that matches the through holes 16 and 16' of the mounting plate 17 at the rotation start position. The holding pin 20 has through holes 16 , 16
' and reaches the bottom of the mounting plate 17.

At the same time, the protrusion 6a of the pin 6. 6a' presses the bottom surface of the concave grooves 24, 24' of the second cam body 21 to return the second cam body 21 and move it against the spring 25, so that the projections 22, 22'
The pilot valve 2 is released from the through hole 16°16' to release the lock and enable the operating shaft 10 to rotate.
7 is opened against the spring 32 to enable gas to be supplied to the pilot burner, and the cam surface 8 of the first cam body 7,
The protrusions 6 a and 6 a' of the pin 6 are brought into pressure contact with the lowest part 15° 15' of the inclined surface 14 and 14' of the pin 8' (see FIGS. 5 and 7).

Thereafter, when the operating shaft 1 is rotated in a predetermined direction (counterclockwise in FIG. 3) while still being pressed, the protrusion 6a,
6a' is fitted into the concave grooves 24, 24', so the second cam body 21 rotates together, and the protrusions 22, 22' are fitted into the mounting plate 1.
7 and the holding pin 20 is also located at the bottom of the mounting plate 17.
Since the upper movement of the operating shaft 1 is prevented by the return spring 5, the pilot valve 27 will be reliably opened even if the operation shaft 1 is no longer suppressed.

And the protruding portion 6a. 6a' slides on the inclined surfaces 14, 14' of the first cam body 7 and moves horizontally, so the first cam body T is pushed down against the spring 12, but when it rotates approximately 90 degrees, it is depressed. Projections 6a, 6a in grooves 13, 13'
By recessing the first cam body 7, the first cam body 7 returns to its original position.

Therefore, the protruding portions 6 a 25 a' are connected to the end surfaces 8 a, 8 a.
.

15a and 15a', the rotation range of the operating shaft 10 is reliably restricted, and the rotation of the operating shaft 1 in the opposite direction at the pressing forward position is prevented by being recessed and locked in the grooves 13°13'. Movements are also prevented.

At this time, the closure 2 rotates together with the operating shaft 1, and at the initial stage, gas is sent to the pilot burner through the pilot hole, and the cam plate 37 activates the piezoelectric ignition device to emit a spark and ignite the pilot burner. Next, the through hole a is opened to make it fully open, gas is also supplied to the main burner, and it is ignited with the previously lit pilot flame.

After the ignition operation is completed, when the pressing operation of the operating shaft 1 is released,
The operating shaft 1 is returned by the force of the spring 50, and at the same time the pilot valve 27 is also closed.

At this time, the holding pin 20 passes through the through holes 19, 19' and reaches the upper side of the mounting plate 17 (see FIGS. 6 and 8).

The protrusions 6a and 6a' of the pin 6 are formed into grooves 13°13.
', and is positioned near the upper ends of the cam surfaces 8, 8', and can pass over the tops of the inclined surfaces 14, 14', allowing the operating shaft 1 to rotate in the opposite direction.

Further, since the pressing force is released, the second cam body 21 returns together with the operating shaft 1 by the spring force of the spring 250, but on the way, the protrusions 22, 22' come into contact with the lower surface of the mounting plate 17, so that the second cam body 21 does not completely return. It does not return to its original position (see the chain line in Figure 8).

Therefore, by rotating the operating shaft 1 in the opposite direction, the opening degree of the closing member 2 can be gradually narrowed from the through hole a to the pilot hole. The burner can be adjusted to the desired power.

The protrusions 6a, 6a' are in the grooves 24, 2 until reaching the closed position.
4', the second cam body 21 rotates together with the operating shaft 1, and when the operating shaft 1 reaches the rotation start end, the protrusions 22, 2
2' is fitted into the through holes 16 and 16', and the operating shaft 1 is prevented from rotating via the second cam body 21, thereby preventing inadvertent rotation at the non-use stop position.

In addition, since the operating shaft 1 is prevented from rotating in the opposite direction in the depressed state after the main burner ignites, the pilot valve 27 is not opened during the reverse rotation as in the conventional case (gas from the pilot burner Safety is ensured as there is no leakage of water.

Note that the rotation for ignition operation is made after the protrusion 22゜22' (pin 20) passes through the bottom surface of the mounting plate 17, and then the operation shaft 1 is rotated.
When the depression is released, the protrusions 6a, 6a'
escapes from the concave grooves 24, 24', moves above the concave steps 23, 23', and the second cam body 21 remains at that position,
Sliding friction between the protrusions 22, 22' and the mounting plate 17 no longer occurs, and the through holes 16 of the protrusions 22, 22'
, 16' is difficult to insert.

Although the configuration in which the concave step portions 23 and 23' are carved in the second cam body 21 has been described above, it is not always necessary to carve them. In this case, the operating shaft 1 and the second cam body 21 are always are rotated together through the

Further, although the cam surfaces 8, 8' are carved on the inner peripheral surface of the first cam body 7, they may be carved over the entire thickness of the cylindrical body.

Furthermore, although the through holes 16 and 16' are provided with lock holes into which the protrusions 22 and 22' fit, they may be formed at separate locations. 2
It is clear that the positional relationship is such that it can be separated from z.

As explained above, this invention is a gas cock equipped with a push-turn type ignition function that moves the operating shaft forward and backward at the start and end of the rotation, and in which the rotation range regulating pin protrudingly fixed to the operating shaft is used to prevent the body from rotating. By being connected to the cam surface of the first cam body that is blocked and slidably inserted, the rotation range of the operating shaft is regulated to a predetermined range, and gas flows out from the pilot burner after ignition is completed. This eliminates the inconvenience of having to operate the system, and improves safety without causing malfunctions.

Furthermore, by inserting into the first cam body a second cam body that is rotated by engaging with the rotation range regulating pin and has a protrusion that fits into a lock hole drilled in the mounting plate. It is also possible to prevent rotation of the operating shaft when it is not in use, thereby preventing accidental rotation of the operating shaft and ensuring safety during ignition.

In addition, the invention has a small number of component parts and is easy to assemble, making it a practically effective invention.

[Brief explanation of drawings]

FIG. 1 is an overall longitudinal sectional front view showing an embodiment of the present invention;
Figure 2 is the same side view, Figures 3 and 4 are plan views showing the relationship between the rotation range regulating pin and the cam body, and Figures 5 and 6 are the relationship between the mounting plate and the operating shaft. X-X in Figure 1
7 and 8 are cross-sectional views of the main parts taken along the Y-Y and Z-Z lines, and Figure 9 shows the mounting plate, operating shaft (and pin), first cam body, and second cam. A schematic diagram showing the positional relationship of the bodies, A is a top view of the mounting plate;
Figure 10A2 is a developed view of the inner peripheral surfaces of the first cam body and the second cam body, and Figure 11 is a perspective view of the operating shaft, the first cam body, and the second cam body in an assembled state. . 1... Operating shaft, 6... Rotation range regulating pin, 7... First cam body, 8, 8'...
・Cam surface, 14, 14'... Inclined surface, 13, 1
3'...Concave groove, 17...Mounting plate, 16
, 16'...Lock hole (through hole), 19°19
'...Through hole, 21...Second cam body, 2
4, 24'... Concave groove, 22, 22'...
・Protrusion, 5, 32...Return spring, 20...
...Retaining pin, 12,25...Return spring, A
・・・・・・Vessel.

Claims (1)

[Scope of Claims] 1. The operation shaft 1 is returned and urged upward by the spring 5, and the holding pin 20 protruding and fixed to the operation shaft 1 passes through the through holes 16, 16.
', 19, 19' are bored in the mounting plate 17 so as to cross the angular positions of the rotation start end and the rotation end of the operation shaft, and are installed in the through hole 26 of the closure 2 that rotates together with the operation shaft 1. In order to close the pilot valve 27, the return spring 32 is energized, the operating shaft is pressed against the spring 5, and the holding pin 20 is rotated directly below the mounting plate 17, so that the operating shaft is rotated within the angular range of the through hole. A rotation range regulating pin 6 is protruded and fixed to the operating shaft, and a cylindrical first cam body 7 that engages with the rotation range regulating pin 6 is fixed to the operating shaft. It is slidably inserted into A while preventing rotation, and is urged upward by the return spring 12, and the first
The cam body 7 is provided with grooves 13, 13' at the end of rotation, and inclined surfaces 14, 14' in contact with the grooves and extending over the rotation angle range of the operation shaft 10 up to the start end of rotation. to be set against each other,
Rotation range regulating pin 60 on the suppression rotation cam surface of the operating shaft
The projections 6at6a' at both ends are exposed, the rotation range of the operating shaft 10 is restricted by both end surfaces of the cam surfaces 8, 8', and the concave groove 13°13
1. The gas cock, wherein the protruding portion is recessed into the opening to prevent the operation shaft from rotating toward the rotation start end in the pressed state. 2 Return the operating shaft 1 and urge it upward with the spring 5, and the holding pin 20 protruding and fixed to the operating shaft 1 passes through the through holes 16, 16.
', 19, 19' are bored in the mounting plate 17 so as to cross the angular positions of the rotation start end and the rotation end of the operation shaft, and are installed in the through hole 26 of the closure 2 that rotates together with the operation shaft 1. In order to close the pilot valve 27, the return spring 32 is energized, the operating shaft is pressed against the spring 5, and the holding pin 20 is rotated directly below the mounting plate 17, so that the operating shaft is rotated within the angular range of the through hole. 1, a rotation range regulating pin 6 is protruded and fixed to the operating shaft 1, and a cylindrical first cam body 7 that engages with the rotation range regulating pin 6 is fixed to the operating shaft 1. It is slidably inserted into A while preventing rotation, and is urged upward by the return spring 12, and the first
The cam body has concave grooves 13 and 13' at the end of rotation, and cam surfaces 8 and 8' which are in contact with the concave grooves and have inclined surfaces 14 and 14' cut across the rotation angle range of the operating shaft 10 up to the start of rotation. to be set against each other,
Rotation range regulating pin 6 is placed on the pressing rotation cam surface of the operating shaft 1.
0 both end protrusions 6aj6a' are exposed, the rotation range of the operating shaft 10 is restricted by both end surfaces of the cam surfaces 8, 8', and the concave groove 13°1
The protruding portion is recessed into 3' to prevent the operation shaft from rotating toward the rotation starting end when the operating shaft is pressed, and the cylindrical second cam body 21 is loosely inserted into the first cam body γ and returned to the spring position. 25, and the upper end surface of the second cam body 21 has protrusions 22, 2.
2' and the protruding parts 5a and 5 at both ends of the rotation range regulating pin 60.
a' is formed with a concave groove 24, 24' into which it is fitted, and the through hole 16, 16' at the rotation start end is formed with a protrusion 22, 2.
A gas cock characterized in that 2' is a lock hole that is inserted to prevent rotation due to malfunction of the operating shaft at the rotation start end.