JP7307935B2 - Anti-sticking structure for gas valves - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-adhesion structure for a gas stopper, and more particularly to an anti-adhesion structure for a gas stopper that prevents the attachment of a stem inside a stem container.

As a gas plug, as shown in FIG. 10, a screw containing portion (30) communicating with the gas flow path (31a) and having a tapered inner circumferential surface (35) that widens toward one open end, and a screw containing portion. A gas plug main body (31) is composed of a cylindrical portion (33) extending from the one open end of (30), and the pipe (3) is rotatably accommodated in the pipe housing portion (30). , an inverted truncated cone shape having a tapered outer peripheral surface (36) slidable against the tapered inner peripheral surface (35), and an operation for rotating the shaft (3) on the cylindrical portion (33). Some have a rotatable knob (2).
The figure shows the fully open state of the gas plug, in which the gas passage hole (3a) passing through the pipe (3) communicates with the gas passage (31a). When both are rotated 90 degrees, the gas flow path (31a) is closed by the helix (3), resulting in a fully closed state.
Between the back of the operation knob (2) and the center of the top surface of the screw (3) is a pressing spring (4) for holding the screw (3) pushed into the screw housing (30). ) are interposed in a compressed state, and the spring (3) is housed in a state of being pushed into the spring housing (30) by the biasing force of the pressing spring (4). At this time, the bottom surface of the shear (3) rises from the inner bottom of the shear accommodating portion (30) through a space of a predetermined height, and the tapered inner peripheral surface of the shear accommodating portion (30) (35) is sized to slidably press against the tapered outer peripheral surface (36) of helix (3).

In Patent Document 1, both the gas cock body (31) and the pipe (3) are made of cast iron, and the taper-shaped outer peripheral surface (36) of the pipe (3) or the pipe housing portion (30) with which this slides. A composite plated coating in which fluororesin particles are uniformly dispersed in a nickel or nickel alloy plated coating is formed on either or both of the tapered inner peripheral surfaces (35). As a result, the sliding surface made up of the tapered outer peripheral surface (36) of the spring (3) and the tapered inner peripheral surface (35) of the spring housing (30) has self-lubricating properties and does not supply lubricant. At least, it exhibits excellent lubricity and wear resistance.

In addition, since the pipe (3) and the gas plug main body (31) are made of the same material, they are thermally deformed in the same manner. If the gas plug is placed in an environment with moderate temperature changes, the gas plug main body (31) and the stem (3) are both thermally deformed at the same degree of expansion and contraction, so there is no problem. However, for gas cocks placed in an environment where they are directly heated by splashing hot water or high temperature oil, such as gas cocks used in commercial kitchens, the gas cock body outside the ceiling (3) Only (31) is affected by heat and the temperature rises instantaneously, and a temperature difference of about 40 to 60 degrees may occur between the gas plug body (31) and the pipe (3). .
In such a case, first, the gas plug main body (31) thermally expands and the diameter of the stem accommodating portion (30) expands, so that the stem (3) accommodated therein and not thermally expanded is pushed down. By the biasing force (4), it is pushed into the space on the bottom side of the diameter-expanded shear accommodating portion (30).

In this state, when the gas plug body (31) cools and contracts, the tapered outer peripheral surface (36) of the pipe (3) is pressurized by the tapered inner peripheral surface (35) of the pipe housing (30). It will be tightly tightened, and it will be difficult to rotate the sheath (3) within the sheath (30). In this way, the expansion and contraction of only the gas stopper body (31) occurs repeatedly, and each time the screw (3) is pushed toward the bottom side of the screw storage part (30), the operation knob (2) will not operate. The smooth turning operation of (3) becomes difficult, and the opening and closing operation of the gas valve is hindered.

JP-A-4-341667

Since the sliding surfaces of the gas plug main body (31) and the pipe (3) are tapered surfaces, the gas plug main body (31) sinks into the pipe housing portion (30) due to thermal expansion followed by contraction. The tapered outer peripheral surface (36) of the spring (3) is pushed by the tapered inner peripheral surface (35) of the spring housing (30), causing the spring (3) to rise slightly. However, the amount of lifting is extremely small compared to the amount of descent of the beam (3), and the beam (3) cannot be returned to its original position. Therefore, the sheath (3) is firmly tightened in the sheath (30).

INDUSTRIAL APPLICABILITY The present invention provides a gas plug that can prevent the plug from sinking and sticking to the plug housing even if the gas plug main body undergoes repeated thermal expansion and contraction by being placed in an environment with significant temperature changes. An object of the present invention is to provide an anti-sticking structure.

The solution of the present invention to solve the above-mentioned problems is "a gas plug main body having a taper accommodating portion communicating with a gas passage and having a tapered inner circumferential surface that expands in diameter toward one open end;
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate ,
The shear drop restricting member is press-fitted into a hole provided in the bottom surface of the shear so as to be movable forward and backward in the axial direction,
After the assembly of the gas plug is completed, the falling-down restricting member protrudes from the hole by a predetermined length so that the protruding end of the falling-down restricting member faces the inner bottom of the shear accommodating portion through the minute space. The state in which the
The connection holding force between the hole portion and the shear drop regulating member in the final press-fit state is set to be greater than the biasing force of the biasing means.

The above technical means work as follows.
After completing the assembly of the gas cock, it is accommodated in the spiral container in a final pushed state in which a space of a predetermined height is formed between the bottom surface of the spiral container and the inner bottom of the spiral container. A shear drop restricting member is provided on the inner bottom of the shear accommodating portion or the bottom surface of the shear so as to protrude into the space. In the case where the shear-down restricting member is provided in the inner bottom of the shear accommodating portion, the shear-down is arranged so that a minute space is formed between the shear-down restricting member and the bottom surface of the shear. When the restricting member is provided on the bottom surface of the shear, the dimensional relationship is set so that a minute space is formed between the shear drop restricting member and the inner bottom of the shear accommodating portion.
When hot water or high-temperature oil is applied to the gas cock, first, the gas cock main body thermally expands, causing the diameter of the stem accommodating portion to expand. At this time, the pile sinks by the minute space, and does not sink any more when the shear drop regulating member comes into contact with the bottom of the pile or the inner sole of the pile housing portion. In this state, the tapered outer peripheral surface of the shear is not strongly pressed against the tapered inner peripheral surface of the shear storage portion, and the shear sinks when there is no shear drop restricting member between them. A minimal gap corresponding to the difference between the volume and the microspace is temporarily generated.

After that, when the temperature of the gas cock main body drops and the diameter of the stem accommodation portion shrinks, the above-mentioned minimal gap between the tapered outer peripheral surface of the stem disappears, but the shear drop control member prevents further sinking of the stem. Therefore, the force with which the tapered inner peripheral surface of the shear accommodating portion tightens the tapered outer peripheral surface of the shear is weaker than in the case where there is no shear drop restricting member, and the operating knob allows the shear to rotate. retained.
By rotating the operation knob, the tapered outer peripheral surface of the strip is pushed by the tapered inner peripheral surface of the strip accommodating portion, and the strip rises by the amount of the drop (by the minute space). As a result, the inside of the shear accommodating portion returns to the original accommodation state in which the minute space is provided between the shear drop restricting member and the bottom surface of the shear or between the inner bottom of the shear accommodating portion. In this state, a predetermined load is applied to the spring by the biasing means, so airtightness is ensured and the operating force of the operation knob is stable.

In addition, when the gas cock is assembled , a thin plate with a predetermined thickness is interposed between the bottom surface of the heap and the shear drop control member, or between the shear drop control member and the inside bottom of the pile accommodation part. Then, the strip is pushed into the strip accommodating portion until reaching a final pushed-in state in which the tapered outer peripheral surface of the strip contacts and pressurizes the tapered inner peripheral surface of the shear accommodating portion.
After that, the strip and thin plate are taken out from the shear accommodating portion, and after applying grease to the shear, the strip is again accommodated in the shear accommodating portion until reaching the final pushed state, and the operation knob is moved to the cylindrical portion through the biasing means. , and the gas plug is attached to the assembly completion state.
In order to keep the grease film in a constant and stable state, it is preferable to repeat forward and reverse rotation of the screw when pushing the screw with grease applied to the tapered outer peripheral surface into the screw accommodating portion. Furthermore, the opening/closing operation may be performed by the operation knob after the completion of assembly of the gas valve, or the opening/closing operation may be performed after the installation of the gas valve. By opening and closing the gas cock in this way, the grease film becomes a stable film thickness sufficiently thinner than the thin plate, and the grease film becomes a stable film between the bottom surface of the pile and the shear drop regulating member, or between the shear fall regulating member and the pile housing. A gap corresponding to the thickness of the thin plate is formed between the inner sole and the inner sole. This gap functions as the minute space.

Further, the shear drop regulating member is lightly press-fitted into the hole provided in the bottom surface of the pile so that it protrudes from the bottom surface of the pile by a certain amount. On the other hand, on the inner bottom of the pile containing portion, for example, a thin plate having a thickness corresponding to a minute space is placed, and the pile with the pile drop control member projecting from the bottom surface of the pile is housed thereon. Even after the protruding end of the shear drop regulating member abuts against the thin plate, the shear is continued until the final pushed-in state is reached in which the tapered outer peripheral surface of the shear contacts and pressurizes the tapered inner peripheral surface of the shear storage portion. push in. As a result, the shear drop regulating member is pushed by the thin plate and pushed into the hole until the final press-fit state is reached.
After that, the strip and the thin plate are removed from the shear accommodating section, grease is applied to the strip, and the strip is accommodated again in the shear accommodating section in the final pushed state. Attach it to the part so that it does not come off, and assemble the gas stopper.
In order to keep the grease film in a constant and stable state, it is preferable to repeat forward and reverse rotation of the screw when pushing the screw with the grease applied to the tapered outer peripheral surface into the screw accommodating portion. Furthermore, the opening/closing operation may be performed by the operating knob after the completion of assembly of the gas valve, or the opening/closing operation may be performed after the installation of the gas valve. By opening and closing the gas cock in this way, the grease film becomes sufficiently thinner than the thin plate and has a stable film thickness, and the gap between the shear drop regulating member protruding from the bottom of the pile and the inner bottom of the pile housing section , a gas plug having a minute space corresponding to the thickness of the thin plate is completed.
Since the coupling holding force in the final state of press-fitting of the shear-down restricting member into the hole is set to be greater than the biasing force of the biasing means, the diameter of the shear-holding portion expands due to the thermal expansion of the gas plug main body. Even if the projecting end of the descent restricting member abuts against the inner bottom side of the shear receiving portion, the slack descent restricting member is not further pushed into the hole due to the urging force of the urging means.

Another solution of the present invention to solve the above-mentioned problems is "a gas plug main body having a taper receiving portion communicating with a gas passage and having a tapered inner peripheral surface that expands toward one open end. and,
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate,
The shear drop restricting member is press-fitted into a hole provided in the inner bottom of the shear accommodating portion so as to be movable forward and backward in the axial direction,
After the assembly of the gas plug is completed, the falling-down restricting member projects a predetermined length from the hole so that the projecting end of the falling-down restricting member faces the bottom surface of the ceiling through the minute space. is the final press-fit state of the shear drop regulating member,
The connection holding force between the hole portion and the shear drop regulating member in the final press-fit state is set to be greater than the biasing force of the biasing means.
The shear drop regulating member is lightly press-fitted into the hole provided in the inner bottom of the shear receiving portion so that it protrudes from the inner bottom of the shear receiving portion by a certain amount. Then, in a state in which a thin plate having a predetermined thickness, for example, as described above is placed on the top surface of the shear drop regulating member, the shear is accommodated in the shear accommodating portion. Even after the bottom surface of the shear contacts the protruding end of the shear drop regulating member via the thin plate, the tapered outer peripheral surface of the shear contacts and pressurizes the tapered inner peripheral surface of the shear accommodating portion. By pushing the shear down until the condition is reached, the shear drop restricting member is pushed through the thin plate to the bottom surface of the shear and pushed into the hole until the final press-fit condition is reached.
After that, the strip and the thin plate are removed from the shear accommodating section, grease is applied to the strip, and the strip is accommodated again in the shear accommodating section in the final pushed state. Attach it to the part so that it does not come off, and assemble the gas stopper.
In order to keep the grease film in a stable thin film state, it is preferable to repeat forward and reverse rotation of the screw when pushing the screw with grease applied to the tapered outer peripheral surface into the screw storage part. Furthermore, the opening/closing operation may be performed by the operating knob after the completion of assembly of the gas valve, or the opening/closing operation may be performed after the installation of the gas valve. By opening and closing the gas valve in this way, the grease film becomes sufficiently thinner than the thin plate and has a stable film thickness, and the gap between the shear drop regulating member protruding from the inner bottom of the shear accommodating portion and the bottom surface of the shear is , the gas plug is completed in a state in which a minute space corresponding to the thickness of the thin plate is formed.
Since the coupling holding force in the final state of press-fitting of the shear-down restricting member into the hole is set to be greater than the biasing force of the biasing means, the diameter of the shear-holding portion expands due to the thermal expansion of the gas plug main body. Even if the bottom surface of the shear drop restricting member abuts against the protruding end of the shear drop restricting member, the shear descending restricting member is not further pushed into the hole due to the biasing force of the biasing means.

Still another solution of the present invention to solve the above-mentioned problems is "a gas plug provided with a plug receiving portion communicating with a gas passage and having a taper-shaped inner peripheral surface that expands toward one open end. the main body;
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate,
The shear drop regulating member comprises an annular plate having a hole and a shaft press-fitted into the hole,
After the assembly of the gas valve is completed, one end surface of either the shaft or the annular plate is in contact with either the bottom surface of the barrel or the inner bottom of the barrel housing portion, and either the shaft or the annular plate or the other end surface facing the other of the bottom surface of the beam or the inner bottom of the beam receiving portion through the minute space is the final press-fit state of the shaft into the hole of the annular plate,
The coupling holding force between the annular plate and the shaft in the final press-fit state is set to be greater than the biasing force of the biasing means.
For example, the shaft inserted through the hole of the annular plate is placed in the center of the inner bottom of the shear housing, and a thin annular plate with a predetermined thickness is placed on the upper surface of the annular plate. is housed in the storage compartment. In addition, it is assumed that an insertion hole which can accommodate the upper end of the shaft and which has a smaller diameter than the diameter of the annular thin plate is formed in the center of the bottom surface of the ceiling so as to open downward. When the shear is pushed in until reaching the final pushed state where the tapered outer peripheral surface of the shear contacts and pressurizes the tapered inner peripheral surface of the shear accommodating portion, the annular plate is pushed down together with the annular thin plate against the shaft. It will be in the final press-fit state. After that, the shear and the annular thin plate are removed from the shear storage. Then, from above the annular plate that is in the final press-fitted state with respect to the shaft, the screw to which grease is applied is again housed in the screw housing portion in the final pushed state, and the operation knob is moved to the screw housing portion via the biasing means. The gas plug is attached to the cylindrical portion so as to prevent it from coming off, and the assembly of the gas plug is completed.
In order to keep the grease film in a stable thin film state, it is preferable to repeat forward and reverse rotation of the screw when pushing the screw with grease applied to the tapered outer peripheral surface into the screw storage part. Furthermore, the opening/closing operation may be performed by the operation knob after the completion of assembly of the gas valve, or the opening/closing operation may be performed after the installation of the gas valve. By opening and closing the gas valve in this way, the grease film has a stable thickness sufficiently thinner than the thin plate, and a minute space corresponding to the thickness of the thin plate is formed between the upper surface of the annular plate and the bottom surface of the spiral. is formed.
Since the coupling holding force of the annular plate and the shaft is set to be greater than the biasing force of the biasing means, the diameter of the shear accommodating portion expands due to thermal expansion, and the biasing means lowers the shear. Even if the bottom surface of the ring abuts against the annular plate, the annular plate will not descend further along the shaft.

In the gas stopper sticking prevention structure described above, preferably, the falling-down restricting member or the shaft body is a spring pin that can be press-fitted into the hole. , can be press-fitted into the hole. It is assumed that the connection holding force with the hole due to the elastic restoring force of the spring pin is set to be larger than the biasing force of the biasing means.

As described above, according to the present invention, since the shear drop regulating member is provided between the inner bottom of the sheath accommodating portion and the bottom surface of the sheath via a minute space, the gas stopper main body can be instantaneously Even if the diameter of the shear accommodating portion expands due to thermal expansion, the shear only sinks by the minute space, and the shear drop restricting member prevents further sinking. Therefore, even if the inside diameter of the gas plug body expands due to thermal expansion and then cools and shrinks, the tapered inner peripheral surface of the gas plug housing portion cannot be opened or closed by the tapered outer peripheral surface of the gas plug. Don't tighten it so tightly that it won't come off. Therefore, the screw is not fixed in the screw accommodating portion, and is maintained in a rotatable state by rotating the operation knob. Further, by performing the rotating operation, the canopy can be returned to almost its original position, and the gas valve can be maintained in a state in which it can be rotated with a normal operating force.

In addition, even if there is no big temperature change like boiling water, the crack may sink into the container due to repeated normal temperature changes. Therefore, it can be absorbed in the minute space.
In this way, even if the gas plug is subject to instantaneous temperature effects, or even if temperature changes around the gas plug are repeated for a long period of time, the tape will not sink into the inside of the housing and become fixed. Since this can be prevented, the operation knob can always be rotated with a stable operating force, and the smooth opening and closing operation of the gas valve can be maintained over a long period of time.
Further, by using a spring pin having a C-shaped cross section as the falling-down restricting member, it is possible to easily provide a structure for preventing the gas plug from sticking.

FIG. 3 is a cross-sectional view of a gas plug having been assembled to which the sticking prevention structure for a gas plug according to the first embodiment of the present invention is applied; FIG. 4 is a cross-sectional view showing a spiral drop regulating member according to the sticking prevention structure for a gas plug according to the first embodiment of the present invention; FIG. 3 is a cross-sectional view showing a gas plug main body, a spiral descent restricting member, and a thin plate according to the gas plug sticking prevention structure according to the first embodiment of the present invention; FIG. 10 is a cross-sectional view of the completed state of assembly of the gas plug employing the sticking prevention structure for the gas plug according to the second embodiment of the present invention; FIG. 7 is a cross-sectional view showing a gas plug main body, a shear-down restricting member, and a thin plate according to the sticking prevention structure for a gas plug according to a second embodiment of the present invention; FIG. 8 is a cross-sectional view showing a gas plug main body, a shear-down restricting member, a thin plate, and a shaft in a final pushed state according to the sticking prevention structure for a gas plug according to a second embodiment of the present invention; FIG. 11 is a cross-sectional view showing a gas plug main body, a shear-down restricting member, and a thin plate according to the sticking prevention structure for a gas plug according to a third embodiment of the present invention; FIG. 10 is a cross-sectional view showing a gas plug main body, a shear-down restricting member, a thin plate, and a shaft in a final pushed-in state according to the sticking prevention structure for a gas plug according to a third embodiment of the present invention; FIG. 11 is a cross-sectional view of a gas plug in an assembled state to which the sticking prevention structure for a gas plug according to the third embodiment of the present invention is applied; It is a sectional view of a common gas cock.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a gas plug employing a gas plug sticking prevention structure according to the first embodiment of the present invention, and FIG. FIG. 3 is a cross-sectional view of the helix (3), and FIG. 3 shows the helix (3) with the spring pin (1) pushed into the helix housing (30) until the final pushed-in state is reached. It is a sectional view showing.
In the drawing, the gas cock body (31) can be of the same construction as the conventional one, and the bell (3) is also the same as the conventional one except that the bottom surface (32) is formed with a hole (10). It has the same structure as that of , and here both are made of cast iron.
Specifically, the gas plug main body (31) is open upward and has a tapered inner peripheral surface (35) for accommodating the inverted truncated conical spiral (3), and its open end. It has a cylindrical portion (33) connected to the portion and a gas passage (31a) connected to the pipe containing portion (30) so as to communicate with the pipe containing portion (30). The gas plug is opened by connecting (3a) to the gas passage (31a), and the gas plug is closed by rotating the spiral (3) 90 degrees from this state.

Between the pair of operating protrusions (34) projecting from the center of the top surface of the handle (3) and the recess (24) at the center of the back surface of the operating knob (2), the handle (3) is placed in the handle housing ( 30) The engaging portion provided on the back surface of the operation knob (2) on the cylindrical portion (33) of the screw receiving portion (30) with the presser spring (20) interposed as a biasing means for pushing it into (not shown) are engaged in a retaining state and a relative rotation preventing state, and the operation knob (2) is attached so as to be relatively rotatable with respect to the cylindrical portion (33). As a result, when the operating knob (2) is rotated, the handle (3) is pushed toward the bottom of the handle housing (30) by the biasing force of the pressing spring (20), and is held in the same position as the operating handle (2). 90 degrees can be rotated in the direction, and the gas flow path (31a) can be opened and closed.

Next, the sticking prevention structure of the gas plug will be described.
In the present invention, a spring pin (1) having a C-shaped cross section is employed as a shearing-down restricting member that constitutes a structure for preventing sticking of a gas cock.
In the center of the bottom surface (32) of the spring (3) employed in the first embodiment, a hole (10) into which the spring pin (1) can be press-fitted with its diameter reduced is opened downward. there is At this stage, the spring pin (1) should be protruded by a suitable length from the bottom surface (32) as shown in FIG.
On the other hand, as shown in FIG. 3, a thin plate (21) having a predetermined thickness is placed at the center of the bottom of the plug housing (30) of the gas stopper body (31). The spring (3) in the state shown in FIG. 2 is accommodated in the spring housing (30) so that the protruding end of the spring pin (1) abuts.

After the protruding end of the spring pin (1) is brought into contact with the thin plate (21), the tapered outer peripheral surface (36) of the spring (3) after the completion of assembly of the gas plug (3) is in contact with the spring housing (30). Push the spring (3) forward and backward with a predetermined force until it reaches the final pushing state where the tapered inner peripheral surface (35) presses. As a result, as shown in FIG. 3, the spring pin (1) protruding from the hole (10) provided in the center of the bottom surface (32) of the spring (3) has its protruding end It is pushed by the thin plate (21) placed in the center of the insole and is forcibly pushed into the hole (10) until the final press-fit state is reached.

From this state, the shear (3) and the thin plate (21) are removed from the shear storage section (30).
Grease is applied to the tapered outer peripheral surface (36) of the removed spiral (3), and then the gas stopper body (30) is accommodated again and pushed in with a predetermined force while rotating forward and backward. Place the presser spring (20) between the operating protrusions (34) of the spring (3), and then attach the operating knob (2) to the cylindrical portion (33) in a locked state to complete the assembly of the gas valve. state.
In this state, the operation knob (2) is opened and closed several times to several tens of times so that the grease film on the sliding surface becomes a stable thin film.
After completing the assembly of the gas valve, between the projecting end of the spring pin (1), which is in the final state of press-fitting into the hole (10) of the spring (3), and the inner bottom of the spring housing (30), see Fig. 1. , a minute space (S) approximately equivalent to the thickness of the thin plate (21) is formed.
It is assumed that the connection holding force of the spring pin (1) in the final state of press-fitting into the hole (10) is set larger than the biasing force of the pressing spring (20).

When the gas cock with the above configuration is installed in a commercial kitchen, the temperature difference between the gas cock body (31) and the pipe (3) will be It can reach about 40-60 degrees momentarily. In this case, first, the gas plug main body (31) thermally expands, and the diameter of the plug receiving portion (30) expands. Then, the spring (3) is pushed into the inner bottom side of the spring housing (30) by the biasing force of the spring (20), but the spring pin (1) protrudes from the bottom surface (32) of the spring (3). Since there is a minute space (S) between the protruding end of the spring pin (1) and the inner bottom of the screw housing (30), the screw (3) is After sinking, the protruding end of the spring pin (1) abuts against the inner bottom of the screw receiving portion (30), preventing further sinking.
At this time, the spring (3) is in a state of being pressed toward the inner bottom side of the spring housing (30) by the biasing force of the pressing spring (20), but the biasing force exerts the final force on the hole (10). Since it is set to be smaller than the connection holding force of the spring pin (1) in the press-fit state, the spring pin (1) will not be further pushed into the hole (10), and the screw (3) will sink further. never.

In this state, the tapered outer peripheral surface (36) of the spring (3) does not press against the tapered inner peripheral surface (35) of the spring housing (30), and there is a very small gap (not shown) between them. . Since hot water or high-temperature oil is applied only temporarily, when the gas plug body (31) is cooled and the diameter of the sluice housing portion (30) is reduced, the above-mentioned minimal gap disappears, but the sill ( The tapered outer peripheral surface (36) of 3) is held slidably on the tapered inner peripheral surface (35) of the screw receiving part (30), rather than being tightly clamped so as to prevent rotation of the screw (3). It is in a state of If the operation knob (2) is rotated from this state, the operation force is slightly large at first, but the spring pin (3) contacts the inner bottom of the spring pin (1) with the inner bottom of the spring pin (1). When the screw (3) starts to rotate, the tapered outer peripheral surface (36) of the screw (3) is pushed by the tapered inner peripheral surface (35) of the screw storage part (30), and the screw (3) is stored. It rises in the part (30) and returns to the original assembled state with the small space (S) interposed below the spring pin (1).
In this state, the spring (20) applies a predetermined load to the spring (3). The operating force of the knob (2) is stable.

Next, a second embodiment will be described.
As shown in FIG. 4, the gas stopper sticking prevention structure of the second embodiment has a hole (11) into which the spring pin (1) can be press-fitted in the center of the inner bottom of the spring container (30). A small space (S) is formed between the projecting end of the spring pin (1) inserted into the hole (11) in the final press-fit state and the bottom surface (32) of the screw (3). It is something to do.
First, as shown in FIG. 5, the spring pin (1) is appropriately press-fitted into the hole (11), and the thin plate (21) is placed on the projecting end. Then, a string (3) having a structure similar to that of the conventional one is received from above, and the string (3) is rotated forward and backward and pushed in with a predetermined force until reaching the final pushed-in state as described above. As a result, the spring pin (1) is pressed by the bottom surface (32) of the spring (3) via the thin plate (21), and is press-fitted into the hole (11) until the final press-fit state shown in FIG. be.

After that, as in the first embodiment, the pile (3) and the thin plate (21) are taken out of the pile housing (30). In this state, the spring pin (1), which has been press-fitted into the hole (11) in the final press-fitting state, protrudes from the center of the insole of the shear receiving portion (30).
In this state, the thread (3) coated with grease is again stored in the thread storage section (30), and the operation knob (2) is prevented from slipping out of the cylindrical section (33) via the pressing spring (20). to complete the assembly of the gas valve. In this state, the operation knob (2) is rotated several to several tens of times to make the grease film on the sliding surface of the spring (3) into a stable thin film state.
Then, as shown in FIG. 4, a thin plate ( A minute space (S) corresponding to the thickness of 21) is formed.

In this embodiment, when the diameter of the reservoir (30) expands due to the thermal expansion of the gas stopper body (31), the reservoir (3) sinks under the biasing force of the pressing spring (20). When the bottom surface (32) of the spring (3) is submerged by the minute space (S), the bottom surface (32) of the spring (3) contacts the protruding end of the spring pin (1) protruding from the inner bottom of the spring housing, so that the spring (3) will not sink any further.
In this embodiment as well, the connection holding force of the spring pin (1) in the final state of press-fitting into the hole (11) is set to be greater than the urging force of the pressing spring (20). ) pushes the spring pin (3) toward the inner bottom of the spring housing portion (30), the spring pin (1) cannot be pushed deeper into the hole (11) than the final press-fit state. do not have.
After that, even if the gas plug main body (31) is cooled, the tapered outer peripheral surface (36) of the pipe (3) will remain in the pipe housing (30) as in the case of the first embodiment. The tapered inner peripheral surface (35) is not so tightly tightened that the screw (3) cannot be rotated, and the screw (3) can be opened and closed by rotating the operation knob (2).

The shearing-down restricting member employed in the gas cock sticking prevention structure of the third embodiment comprises a shaft (13) made of a spring pin (1) and a hole (13) provided in an annular plate (14). 15), and as shown in FIG. 7, the shaft (13) is moderately press-fitted into the hole (15) of the annular plate (14) and inserted into the inner bottom of the insertion receiving portion (30). Place in the center.
An annular thin plate (22) having an insertion hole (23) through which the shaft (13) can be inserted is placed on the upper surface of the annular plate (14).
Then, the screw (3) is accommodated in the screw storage part (30) from above.

In the center of the bottom surface (32) of the spring (3) employed in this embodiment, as shown in FIG. The hole (12) is formed, and the tapered outer peripheral surface (36) of the shear (3) abuts against the tapered inner peripheral surface (35) of the shear receiving portion (30) to reach the final pushed state. When the stem (3) is pushed in, the protruding end of the shaft (13) is inserted into the insertion hole (12), and at the same time, the bottom surface (32) of the stem (3) is inserted into the insertion hole (12). At the peripheral edge of the open end, the annular plate (14) is pressed through the thin plate (22), and the shaft (13) is finally press-fitted into the hole (15) of the annular plate (14).

After that, the beam (3) and the thin plate (22) are taken out from the beam receiving part (30), and the shaft (13) is pressed into the hole (15) of the annular plate (14) in the final press-fit state. Then, the grease-applied stem (3) is re-stored, and the operation knob (2) is attached to the cylindrical portion (33) via the pressing spring (20) so as to prevent it from coming off, as shown in FIG. The installation of the gas stopper is completed.
In this assembled state, if the operation knob (2) is rotated several to several tens of times to make the grease film into a stable thin film state, the top surface of the annular plate (14) and the bottom surface of the screw (3) (32), a minute space (S) approximately equal to the thickness of the thin plate (22) is formed.

When the gas stopper body (31) of this embodiment thermally expands and the diameter of the trap housing portion (30) expands, the trap (3) is pushed by the biasing force of the pressing spring (20) and closes into a small space. Although it sinks by (S), the peripheral edge of the open end of the insertion hole (12) in the bottom surface (32) of the ceiling (3) is held in contact with the annular plate (14). At this time, by setting the coupling holding force between the annular plate (14) and the shaft (13) to be greater than the biasing force of the pressing spring (20), the pressing force of the pressing spring (20) causes the annular plate to move. (14) is not pushed by the helix (3) and descends along the shaft (13).
After that, even if the gas plug main body (31) is cooled, the tapered outer peripheral surface (36) of the pipe (3) will remain in the pipe housing portion as in the case of the first and second embodiments. The tapered inner peripheral surface (35) of (30) is not so tightly tightened that the screw (3) cannot be rotated, and the screw (3) can be opened and closed by rotating the operation knob (2). I can.
Further, in this embodiment, the annular thin plate (22) having the insertion hole (23) through which the shaft (13) can be inserted is placed on the upper surface of the annular plate (14). As in the third embodiment, the thin plate (21) is placed in the center of the bottom of the screw housing (30), and the lower end of the shaft (13) is brought into contact with the upper surface of the thin plate (21). Also in this case, a minute space (S) corresponding to the thickness of the thin plate (22) can be formed between the top surface of the annular plate (14) and the bottom surface (32) of the spiral (3). .

As in each of the above embodiments, the spring pin (1) is provided in the spring (3) or the spring accommodation portion (30) as a shear drop regulating member, and the protruding end of the spring pin (1) and the spring (3) By forming a minute space (S) between the bottom surface or the inner sole of the sluice receiving portion (30), the gas plug main body (31) thermally expands and the sluice receiving portion (30) expands in diameter. Even if it is immediately cooled and reduced in diameter, the shear (3) will only descend by the minute space (S), and the tapered outer peripheral surface (36) of the shear (3) will become the tapered shape of the shear accommodating portion (30). Since the internal peripheral surface (35) prevents the screw (3) from being tightened so firmly that it cannot rotate, the screw (3) is prevented from being fixed in the screw accommodating part (30). can be done.
In other words, even if there is a momentary temperature difference between the gas cock body (31) and the pipe (3), the turning operation of the pipe (3) by the operation knob (2) will not be hindered. , the screw (3) will not be stuck in the screw housing (30) and the gas valve will not be able to be opened and closed.

In addition, even if the pipe (3) sinks due to the temperature difference between the gas stopper body (31) and the pipe (3) within the normal temperature range, the amount of sinking is very small, and the minute space (S) can absorb the gas. Since it can be done, it is possible to prevent sticking of the thread (3).
Furthermore, even if a sudden change in ambient temperature affects a gas valve that has not been opened or closed for a long period of time, the helix (3) can be opened and closed when necessary.

In the above embodiment, the spring pin (1) is used as the shear drop regulating member. It is not limited to this as long as it has a property stronger than the biasing force of 20).

In addition, the handle (3) is housed between a pair of operation protrusions (34) projecting from the center of the top surface of the handle (3) and between the recess (24) at the center of the back surface of the operation knob (2). A pressing spring (20) is interposed as a biasing means for pushing into the part (30), but a drive shaft (not shown) that drives the screw (3) is connected between the screw (3) and the knob (2). It may be provided in between so that the handle (3) can be opened and closed through the drive shaft by operating the knob (2). In this case, the pressing spring (20) as the biasing means is provided between the helix (3) and the drive shaft.

(1) ・・・・・・・Spring pin (slip control member)
(2) ・・・・・・・・Operation Knobs
(3)
(20) ・・・・・・・・Retaining spring (biasing means)
(30) ………….
(31) ・・・・・・・・Gas plug body
(31a) ・・・・・・ Gas passage
(32)・・・・Bottom
(35)・・・・Tapered inner surface
(36)・・・・Tapered outer peripheral surface
(4) ・・・・・・・・Retaining spring (biasing means)
(S) ・・・・・・・・Small space

Claims (5)

a gas plug main body having a taper accommodating portion communicating with the gas passage and having a tapered inner peripheral surface that expands toward one open end;
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate ,
The shear drop restricting member is press-fitted into a hole provided in the bottom surface of the shear so as to be movable forward and backward in the axial direction,
After the assembly of the gas plug is completed, the falling-down restricting member protrudes from the hole by a predetermined length so that the protruding end of the falling-down restricting member faces the inner bottom of the shear accommodating portion through the minute space. The state in which the
The gas plug sticking prevention structure , wherein a connection holding force between the hole portion and the shear drop regulating member in the final press-fit state is set to be larger than the biasing force of the biasing means. a gas plug main body having a taper accommodating portion communicating with the gas passage and having a tapered inner peripheral surface that expands toward one open end;
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate,
The shear drop restricting member is press-fitted into a hole provided in the inner bottom of the shear accommodating portion so as to be movable forward and backward in the axial direction,
After the assembly of the gas plug is completed, the falling-down restricting member projects a predetermined length from the hole so that the projecting end of the falling-down restricting member faces the bottom surface of the ceiling through the minute space. is the final press-fit state of the shear drop regulating member,
The gas plug sticking prevention structure, wherein a connection holding force between the hole portion and the shear drop regulating member in the final press-fit state is set to be larger than the biasing force of the biasing means. a gas plug main body having a taper accommodating portion communicating with the gas passage and having a tapered inner peripheral surface that expands toward one open end;
a shaft that is rotatably accommodated in the shear housing portion and has a tapered outer peripheral surface that is slidable on the tapered inner peripheral surface;
an operation knob that is attached to one open end of the stem accommodating portion in a retaining state and rotates the stem to open and close the gas passage;
and an urging means for urging the rod toward the inner bottom of the rod containing portion,
A shear drop regulating member is provided on the bottom surface of the pile or the inner bottom of the pile housing so as to protrude into the space provided between the bottom surface of the pile and the middle bottom of the pile housing,
A minute space is formed between the bottom surface of the pile in the final pushed state after the completion of the assembly of the gas plug and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. A gas stopper sticking prevention structure configured to be
When assembling the gas cock, a thin plate having a predetermined thickness is interposed between the bottom surface of the pile in the final pushed state and the shear drop restricting member, or between the shear drop limiting member and the inner bottom of the pile accommodating portion. ,
The microspace is formed by removing the thin plate,
The shear drop regulating member comprises an annular plate having a hole and a shaft press-fitted into the hole,
After the assembly of the gas valve is completed, one end surface of either the shaft or the annular plate is in contact with either the bottom surface of the barrel or the inner bottom of the barrel housing portion, and either the shaft or the annular plate or the other end surface facing the other of the bottom surface of the beam or the inner bottom of the beam receiving portion through the minute space is the final press-fit state of the shaft into the hole of the annular plate,
A fixation prevention structure for a gas plug, wherein a coupling holding force between the annular plate and the shaft in the final press-fit state is set to be greater than the biasing force of the biasing means. In the gas stopper sticking prevention structure according to claim 1 or claim 2 ,
A structure for preventing the gas plug from sticking, wherein the shearing-down restricting member is a spring pin that can be press-fitted into the hole. In the sticking prevention structure of the gas plug according to claim 3 ,
A structure for preventing the gas plug from sticking, wherein the shaft body is a spring pin that can be press-fitted into the hole.

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