JP2001201039A - Needle-type appliance plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a burner with a stable quantity of gas against the quantity of lifting of the valve body, get, especially, middle thermal power and small thermal power stably, perform gas shutting off without fail, and omit an O ring for the valve seat of a conventional separate part. SOLUTION: The first seal face 2, the second seal face 3, and the third seal face 4, changing in bore in three stages, are made at the inner face 1a of a valve body 1. A lateral hole 5 is made at the first seal face 2. The first shut off part 11 to slide on the first seal face 2, the second shut off part 12 free of contact with and separation from the second seal face 3, and the third shut off part 13 free of contact with and separate from the third seal face 4 are made at the outer face of the valve body 10. A tapered section 14 is provided at the outer face of the third shut off part 13, and a gas passage 15 for small fire is provided inside it. The valve body 10 is switched over into a middle fire and large fire adjusting range P1, a small fire adjusting position P2, and a shut off position P3, being driven in a certain range by a driver 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle-type instrument stopper.

[0002]

2. Description of the Related Art Conventionally, a rotary closure type device plug used as an electric device plug for a gas stove is roughly divided into a valve body and a closure, and the closure is provided with a groove for adjusting a gas amount. (Gas passage) is provided on the circumference. Grease is applied to the contact surface between the closure and the valve body in order to prevent gas leakage and improve rotational slidability. Such a rotary closure type device plug has an advantage that the structure is simple and can be closed, but on the other hand, the grease enters the closing groove not less than a little, and as a result, the rotation angle of the closing is reduced. There is a problem that each gas amount becomes unstable (varies). There is no particular problem in the case where the user adjusts the heating power to a small flame while manually watching the flame as in the related art.

Further, as another conventional example of the electric appliance plug for gas stove, Japanese Patent Application Laid-Open No. H11-108204 discloses a needle type appliance plug A 'as shown in FIG. A lateral hole 5 is provided in the side wall of the valve body 1 ', and the lateral hole 5 is provided.
At a position closer to the gas inlet side, a valve seat O-ring 30 made of a separate component from the valve body 1 ′ is attached.
The distal end of the valve body 10 'is provided with a tapered portion 14 which is inclined so as to become thinner toward the distal end. A dug 33 and a needle hole 32 orthogonal to the dug 33 are provided inside the tapered portion 14, and the needle hole 32 opens to a concave portion 40 provided at the base of the tapered portion 14. In this needle-type instrument plug A ', the valve element 10' is moved up and down to adjust the tapered portion 1 in the medium fire / large fire adjustment range shown in FIG.
By adjusting the gap between 4 and the O-ring 30 for the valve seat, a large fire gas amount and a medium fire gas amount can be obtained. FIG.
In the small fire adjustment position shown in (b), the gas can be supplied only from the needle hole 32 by pushing down the valve element 10 ′ and bringing the tapered portion 14 into contact with the valve seat O-ring 30,
A small amount of fire gas can be obtained. Further, by pushing down the valve body 10 'and fitting the tapered portion 14 into the O-ring 30 for the valve seat, the gas is closed as shown in FIG.
The gas passage can be closed.

In the above-mentioned needle type instrument plug A ', the adjustment of the gas amount is determined almost stably by the lift amount of the valve body 10', and the small fire gas amount can be obtained relatively stably by the needle hole 32. There is an advantage that can be.

[0005]

However, in the needle-type instrument plug A 'disclosed in Japanese Patent Application Laid-Open No. H11-108204, a separate O-ring 30 for a valve seat is attached to the inner surface of the valve body 1'. O-ring 30 for valve seat when gas is closed
The valve seat 10 ′ is pressed against the tapered portion 14 provided at the tip of the valve body 10 ′, so that the O-ring 30 for the valve seat is easily deformed. The precision of the adjustment becomes worse, and especially the adjustment of the medium heat power and the closing of the gas become difficult. In other words, when the gas is closed as shown in FIG.
Since 0 is pushed out by the tip of the valve body 10 ', the O-ring 30 for the valve seat is easily plastically deformed. Therefore, the O-ring 30 for the valve seat deformed when the valve body 10' is lifted up. Adjustment of the gap between the parts becomes unstable. In particular, the adjustment accuracy of the medium heat power is deteriorated, and the adjustment accuracy of the small heat power is also deteriorated. Further, the gas may be incompletely closed. Since the ring 30 is formed as a separate part, the number of parts of the valve body 1 ′ increases, which causes a problem that the structure becomes complicated and the cost increases. In addition, the valve body 10 '
Is electrically driven, there is also a problem that the output of the motor needs to be increased because the force for expanding the valve seat O-ring 30 is applied to the motor when the gas is closed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to supply a burner with a gas amount which is stable with respect to the lift amount of a valve body. In particular, it is possible to stably obtain a medium heat power, and to stably obtain a small amount of fire gas. Further, it is not necessary to use a conventional O-ring for a valve seat as a separate component, and It is an object of the present invention to provide a needle-type instrument stopper capable of reliably closing gas without increasing the output of a driving unit.

[0007]

According to the present invention, in order to solve the above-mentioned problems, an inner surface 1a of a valve body 1 has a first sealing surface 2 having the largest inner diameter and an inner diameter larger than the first sealing surface 2. And a third seal surface 4 having an inner diameter smaller than the second seal surface 3 are formed in this order from the one end 1b side of the valve body 1 to the other end 1c side. A lateral hole 5 is provided in the surface 2, and the lateral hole 5 and the other end 1 of the valve body 1 are provided.
c, a gas passage 6, and a first closure that slides on the outer surface of a valve body 10 slidably housed in the valve body 1 at a position where the lateral hole 5 is not closed. A second closing portion 12 that comes into contact with the second sealing surface 3 so as to be able to come and go;
Third closing portion 1 that comes into contact with the third sealing surface 4 so as to be able to come and go.
3 is formed at the tip end of the third closing portion 13 to form a tapered portion 14 that becomes thinner toward the tip, and one end is opened at the tip of the tapered portion 14 and the other end is opened at the outer surface of the third closing portion 13. The small fire gas passage 15 is formed, and the valve body 10 is driven in a certain range by the drive unit 20, so that the gap between the second closing portion 12 and the second sealing surface 3 and the third closing portion 13 are formed. A medium-fire / large-fire control range P1 in which the amount of gas is adjusted by changing the gap with the third seal surface 4; the second closing portion 12 is separated from the second sealing surface 3; 4 to make the small fire gas passage 15 into the second closing portion 12.
Small fire adjustment position P2 that communicates with the lateral hole 5 through a gap between the second seal portion 3 and the second seal surface 3, the second close portion 12 is brought into contact with the second seal surface 3, and the third close portion 13 is connected to the third seal surface 4. It is characterized in that it can be switched to a closed position P3 in which the gas passage 6 is closed by making contact with it, and with this configuration, only the gap between the third closing portion 13 and the third sealing surface 4 is changed. It is possible to easily and accurately adjust the medium fire power by adjusting the small fire power only by bringing the third closing portion 13 into contact with the third seal surface 4 and opening the small fire gas passage 15. This can also be performed easily and accurately, and the gas can be reliably closed by bringing the second closing portion 12 into close contact with the second sealing surface 3.

The first closing portion 11 and the second closing portion 11
It is preferable to attach O-rings 16, 17, and 18 for gas sealing to the outer peripheral surfaces of the closing portion 12 and the third closing portion 13, respectively. A gas seal between the first sealing surface 2, a gas seal between the third closing portion 13 and the third sealing surface 4 at the time of small fire adjustment, and a second sealing portion 12 and the second sealing surface 3 at the time of gas closing. Gas seals between O-rings 16, 17,
18 ensures that this can be done.

The drive unit 20 includes a worm gear 22
A spiral motor 23 that meshes with the worm gear 22 to convert the rotational motion of the worm gear 22 into a linear motion, and that rotates the valve body 10 about the axis with respect to the valve body 1. It is preferable to provide a rotation stopping means for preventing the rotation. In this case, the rotation of the worm gear 22 can be finely adjusted by controlling the rotation of the worm gear 22 by stopping the rotation of the valve body 10.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

As shown in FIG. 1, a needle-type instrument plug A includes a valve body 1 formed in a substantially cylindrical shape whose inner diameters B1, B2, and B3 (B1>B2> B3) change in three stages; 1
And a valve element 1 slidably housed in the interior of the valve.
And a driving unit 20 for driving the zero.

An inner surface 1a of the valve body 1 facing the gas passage 6 has a first sealing surface 2 having the largest inner diameter B1; a second sealing surface 3 having an inner diameter B2 smaller than the first sealing surface 2;
The third sealing surface 4 having an inner diameter B3 smaller than the sealing surface 3 is formed in this order from the one end 1b side of the valve body 1 to the other end 1c side.

The first sealing surface 2 is provided with a horizontal hole 5 for gas inflow and outflow. In this example, the side hole 5 is a gas outlet connected to the burner, and the other end 1c side of the valve body 1 is a gas inlet. Conversely, the side hole is a gas inlet and the valve body 1 has a gas inlet. The other end 1c may be used as a gas outlet.

The outer diameter of the valve body 10 changes in three stages,
A first closing portion 11 that slides on the first sealing surface 2 at a position where the lateral hole 5 of the valve body 1 is not closed, a second closing portion 12 that comes into contact with the second sealing surface 3 so as to be freely separated, and a third seal. A third closing portion 13 that comes into contact with the surface 4 so as to be able to freely contact and separate is formed. The outer diameter of each of the first closing portion 11, the second closing portion 12, and the third closing portion 13 is equal to the inner diameter B1, of the first sealing surface 2, the second sealing surface 3, and the third sealing surface 4 of the valve body 1. B2 and B3 are each set slightly smaller. These first closing parts 1
O-rings 16, 17, 18 for gas sealing are respectively mounted on the outer peripheral surfaces of the first, second closing part 12 and third closing part 13.

Further, a tapered portion 14 is formed at the distal end of the third closing portion 13 of the valve body 10 so as to become thinner toward the distal end. A small fire gas passage 15 is formed in the third closing portion 13. The small fire gas passage 15 is formed by a dug 15a dug inward from the tip of the tapered portion 14, a small fire orifice 15b provided at the back thereof, and a needle hole 15c orthogonal to the small fire orifice 15b. I have.

The valve body 10 is driven by a drive unit 20 disposed on one end 1b side of the valve body 1. Here, the drive unit 20 includes a motor 21 with a worm gear 22, which meshes with a spiral gear 23 provided at the rear end of the valve body 10.
Can be converted into a linear motion of the valve body 10 via the spiral gear 23. And valve element 1
0 can be moved linearly within a certain range by rotation of the worm gear 22 by the motor 21;
As shown in FIGS. 3A and 3B, the second closing portion 12 and the second
A medium-fire / large-fire control range P1 in which the amount of gas is adjusted by changing the gap between the sealing surface 3 and the gap between the third closing portion 13 and the third sealing surface 4, and a second closing portion as shown in FIG. 12 is separated from the second sealing surface 3 and the third closing portion 13 is brought into contact with the third sealing surface 4 so that the small fire gas passage 15 is closed by the second closing portion 12.
A small fire adjusting position P2 for communicating with the lateral hole 5 through a gap between the second sealing surface 3 and the second sealing surface 3, and as shown in FIG. Is in contact with the third sealing surface 4 to close the gas passage 6.
3 can be switched.

Further, a detent means for preventing the valve body 10 from rotating around the axis with respect to the valve body 1 is provided. As the rotation preventing means, as shown in FIGS.
And a guide pin 24 press-fit into the valve body 10 from the slit hole 25 along the axial direction (vertical direction in FIG. 2). The rotation of the valve body 10 around the axis with respect to the valve body 1 is stopped by the guide pins 24 and the slit holes 25. The slit hole 25 is always shut off from the gas passage 6 by the first closing portion 11 of the valve body 10.

Next, an example of the operation will be described. Motor 21
And the second closing portion 12 of the valve body 10 is
As shown in FIG. 5A or FIG. 5B, the valve body 10 is moved in the medium-fire / large-fire adjustment range P1 in which the third closing portion 13 is separated from the third seal surface 4 and separated from the third seal portion 4. The gas supplied from the other end 1 c of the valve body 1 is supplied to the third closing portion 1.
3 and the third sealing surface 4 and the small fire gas passage 1
5 passes through the gap between the second closing portion 12 and the second sealing surface 3, and is supplied to the burner via the horizontal hole 5. At this time, gas sealing is performed by an O-ring 16 for gas sealing attached to the first closing portion 11 of the valve body 10. At this time, the amount of gas from the lateral hole 5 is equal to the third closing portion 13 and the third gas.
It is controlled by the size of the gap with the sealing surface 4. Since the gap between the third closing portion 13 and the third sealing surface 4 is determined by the linear movement of the valve body 10, the amount of gas supplied to the burner from the lateral hole 5 can be adjusted by the linear movement of the valve body 10. , Medium or large fire can be easily obtained. Moreover, since the conical tapered portion 14 is provided at the distal end of the third closing portion 13 and becomes thinner toward the distal end, the outer peripheral surface of the tapered portion 14 and the third sealing surface 4 are moved by the linear movement of the valve body 10. Fine adjustment of the gap becomes easy, and accordingly, the gas amount can be gently controlled at the time of adjusting the medium thermal power, and the gas amount can be adjusted with high accuracy.

Further, as shown in FIG.
The small fire adjustment position P2 in which the second closing portion 12 is separated from the second sealing surface 3 and the third closing portion 13 contacts the third sealing surface 4
By pressing down the valve body 10, the gas supplied from the other end 1 c of the valve body 1 passes from the small fire gas passage 15 through the gap between the second closing portion 12 and the second sealing surface 3 and passes through the side hole. 5 and is supplied to the burner, so that the amount of small fire gas can be stably obtained. At this time, the gas seal O-ring 18 mounted on the third
By contacting the sealing surface 4, the accuracy of adjusting the small fire can be further improved and the small fire can be stabilized.

Further, as shown in FIG.
By pushing down the valve body 10 to the closing position P3 where the third third closing portion 13 of the zero contacts the third sealing surface 4, the second closing portion 12 can contact the second sealing surface 3 to shut off the gas passage 6. . At this time, the gas is sealed by the O-ring 17 for gas sealing attached to the second closing portion 12, and the gas is reliably closed.

Since the gas is closed by bringing the second closing portion 12 into close contact with the second seal surface 3, there is no problem that the separately provided O-ring for the valve seat is deformed as in the prior art. In addition, in the case of the electric drive type, there has been a problem that a force for pushing and expanding the O-ring for a valve seat is conventionally applied when the gas is closed. Since the gas can be reliably shut off only by contacting the contact 3, there is no need to increase the output of the drive unit 20. Further, since it is not necessary to use the O-ring 30 for the valve seat (FIG. 5) as a separate component as in the related art, it is possible to prevent an increase in the number of components of the valve body 1 and simplify the structure and reduce the cost. There is also an advantage.

Further, the worm gear 2
2 and a guide pin 24 inserted into a slit hole 25 of the valve body 1 to rotate the valve body 10.
Thus, the driving unit 20 can be easily configured. In addition, by stopping the rotation of the valve body 10 about the axis with respect to the valve body 1 by the guide pin 24 and the slit hole 25, the linear movement amount of the valve body 10 can be finely adjusted by controlling the rotation of the worm gear 22. In particular, it is possible to improve the adjustment accuracy of the medium heat power.

[0023]

As described above, according to the first aspect of the present invention, the first sealing surface having the largest inner diameter and the second sealing surface having the smaller inner diameter than the first sealing surface are provided on the inner surface of the valve body. ,
A third seal surface having an inner diameter smaller than the second seal surface is formed in this order from one end side of the valve body to the other end side, and a lateral hole is provided in the first seal surface to form the lateral hole and the valve body. A first closing portion that slides on the outer surface of the valve body slidably housed in the valve main body at a position that does not block the lateral hole and that is in contact with the first sealing surface; A second closing portion that comes into contact with the second sealing surface in a detachable manner, and a third closing portion that comes into contact with the third sealing surface in a freely separating manner are formed, and the tip portion of the third closing portion becomes thinner toward the tip. A taper portion is formed, a small-ignition gas passage having one end opened at the tip of the tapered portion and the other end opened at the outer surface of the third closing portion, and the valve is driven within a certain range by a driving portion. The gap between the second closing portion and the second sealing surface and the gap between the third closing portion and the third sealing surface are thereby changed. And medium heat-fire adjustment range for adjusting the amount of gas Te, a small fire gas passage to and third closure release the second closure from a second sealing surface into contact with the third sealing surface second
A small fire control position for communicating with the lateral hole from a gap between the closing portion and the second sealing surface; and a gas passage for bringing the second closing portion into contact with the second sealing surface and bringing the third closing portion into contact with the third sealing surface. Can be switched to the closing position for closing the third heating unit, so that the medium heat power can be easily and accurately adjusted only by changing the gap between the third closing portion and the third sealing surface.
Just by opening the gas passage for small fire by bringing the closing portion into contact with the third seal surface, the small fire power can be easily and accurately adjusted, and it is possible to control from large fire to medium fire and small fire. Will be possible. In addition, since the gas is reliably closed by bringing the second closing portion into close contact with the second seal surface, there is no problem that the separately provided O-ring for the valve seat is deformed as in the related art, and furthermore, the electric drive type is used. In this case, there is no need to increase the output of the drive unit, and it is not necessary to use a separate O-ring for a valve seat as a separate component, thus preventing an increase in the number of parts of the valve body and simplifying the structure. And cost reduction.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the outer peripheral surfaces of the first closing portion, the second closing portion, and the third closing portion of the valve body are provided with an O for gas sealing. Since each ring is mounted, a gas seal between the first closing portion and the first sealing surface at the time of medium fire / large fire control, and a gas seal between the third closing portion and the third sealing surface at the time of small fire control. When the gas is closed, the gas seal between the second closing portion and the second sealing surface is reliably performed by each O-ring.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the drive unit includes a motor with a worm gear, and the rotational motion of the worm gear is converted into a linear motion by meshing with the worm gear at the valve body. And a detent means for preventing rotation of the valve body around the axis with respect to the valve body, so that the rotation of the worm gear is controlled by controlling the rotation of the worm gear by stopping the rotation of the valve body. The amount can be delicately adjusted, and the adjustment accuracy of the medium heat power can be particularly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an embodiment of the present invention.

FIG. 2A is a side view for explaining a small fire adjustment position according to the embodiment, and FIG. 2B is a cross-sectional view.

FIG. 3A is a cross-sectional view illustrating a medium fire adjustment position according to the first embodiment, and FIG. 3B is a cross-sectional view illustrating a large fire adjustment position according to the first embodiment.

4A is a cross-sectional view when gas is shut off, and FIG. 4B is a cross-sectional view when small fire is adjusted.

FIG. 5 (a) is a cross-sectional view of an example at the time of medium fire adjustment according to the first embodiment;
(B) is a sectional view of an example at the time of large fire adjustment.

FIGS. 6A to 6C are cross-sectional views of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve main body 1a Inner surface 1b One end 1c The other end 2 1st sealing surface 3 2nd sealing surface 4 3rd sealing surface 5 Side hole 6 Gas passage 10 Valve body 11 1st closing part 12 2nd closing part 13 3rd closing part 14 Taper portion 15 Gas passage for small fire 16, 17, 18 O-ring for gas seal 20 Drive unit 21 Motor 22 Worm gear 23 Spiral gear A Needle type instrument plug P1 Medium fire / large fire adjustment range P2 Small fire adjustment position P3 Closed position

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Akira Ota 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi F-term in Harman Co., Ltd. (Reference) 3H052 AA01 BA02 BA03 BA25 CA04 CB02 CD01 CD02 DA01 EA01 EA14 3H062 AA02 AA05 AA15 BB28 BB30 BB33 CC01 EE06 EE11 HH02 3H063 AA01 AA04 AA06 BB22 BB24 BB32 BB39 DA14 DB34 EE11 FF01 GG03 GG11 3K068 AA01 BB01 BB12

Claims (3)

[Claims] 1. A first valve having the largest inner diameter on an inner surface of a valve body.
A sealing surface, a second sealing surface having an inner diameter smaller than the first sealing surface, and a third sealing surface having an inner diameter smaller than the second sealing surface are formed in this order from one end side of the valve body to the other end side. At the same time, a lateral hole is provided in the first sealing surface, a gas passage is provided between the lateral hole and the other end of the valve body, and the lateral hole is formed on an outer surface of a valve body slidably housed in the valve body. A first closing portion slidingly in contact with the first sealing surface at a position where there is no obstruction, a second closing portion in contact with the second sealing surface in a detachable manner, and a third closing portion in contact with the third sealing surface in a detachable manner. A small fire that forms a closing portion, forms a tapered portion at the distal end of the third closing portion, the tapered portion being tapered toward the distal end, and has one end opened to the distal end of the tapered portion and the other end opened to the outer surface of the third closed portion. The second closing portion and the second seal are formed by forming a gas passage for use and driving the valve body in a certain range by a driving portion. Gap and the third closure portion of the Le surface and the third
Adjusting the gas amount by changing the gap with the seal surface
The large fire adjustment range, the second closing portion is separated from the second sealing surface, and the third closing portion is brought into contact with the third sealing surface so that the small fire gas passage is laterally extended from the gap between the second closing portion and the second sealing surface. It is possible to switch between a small fire adjusting position communicating with the hole and a closing position in which the second closing portion is in contact with the second sealing surface and the third closing portion is in contact with the third sealing surface to close the gas passage. A needle-type instrument stopper characterized by the following. 2. A first closing portion, a second closing portion, and a third closing portion of a valve body.
The needle-type instrument plug according to claim 1, wherein an O-ring for gas sealing is attached to each outer peripheral surface of the closing portion. 3. A drive unit comprising: a motor with a worm gear; a spiral gear for meshing with the worm gear on the valve body to convert the rotational motion of the worm gear into a linear motion; 2. The needle-type instrument stopper according to claim 1, further comprising a rotation preventing means for preventing rotation of the needle-type instrument.