JP2015137777A - Gas valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a gas valve device by shortening an axial dimension of a valve housing, in the gas valve device including a rotary valve element in the valve housing 2 rotated while interlocked with a rotating operation of an operation shaft 3 to vary a gas flow rate, and stopper means 6 composed of a projection 61 limiting a rotating range of the operation shaft 3 and formed on an inner peripheral face of an opening portion 21 at one end of the valve housing, and a stopper member 62 having a claw portion 62a rotated while interlocked with the operation shaft.SOLUTION: A valve housing 2 is formed in a state that a part provided with a projection 61 of an opening portion 21 at one end of the valve housing, is axially overlapped to one end portion of a rotary valve element, and an engagement portion 3a engaged with one end portion of the rotary valve element while inhibiting relative rotation, is integrally formed on an end portion of an operation shaft 3. A stopper member 62 is composed of an annular plate member externally inserted to the operation shaft 3 in a state of inhibiting relation rotation, at a position adjacent to one end portion of the rotary valve element, and a folded piece as a claw portion 62a axially bent, is formed on a part of an outer peripheral edge of the plate member.

Description

  The present invention includes a valve housing, an operation knob fixed to one end, and an operation shaft having a second end inserted into an opening of one end of the valve housing. The present invention relates to a gas valve device including a rotary valve body in a valve housing that rotates to vary a gas flow rate, and stopper means that limits a rotation range of an operation shaft.

  Conventionally, in this type of gas valve device, the stopper means is rotated in conjunction with an operation shaft and a stopper protrusion protruding inward in the radial direction formed on a part of the inner peripheral surface of the opening at one end of the valve housing. The stopper member is inserted into the opening at one end of the valve housing, and the claw portion provided on the stopper member comes into contact with the stopper projection from the circumferential direction so that the rotation range of the operation shaft is limited. (For example, refer to Patent Document 1).

  In the case of the conventional example, the valve casing is formed so that the portion where the stopper projection of the opening at one end is formed is positioned on the front side in the axial direction from the one end of the rotary valve body, and the stopper member is operated. It comprises a cylindrical member that is extrapolated to the other end of the shaft, and a claw portion that abuts against the stopper projection is provided on the outer peripheral surface of the cylindrical member. In addition, an engaging portion that engages with one end portion of the rotary valve body so as to be relatively movable in the axial direction and not to be relatively rotatable is extended to the other end of the tubular member, and the tubular member ( The rotary valve body is rotated via a stopper member.

  Here, in the conventional example, since the portion where the stopper projection of the opening at one end of the valve casing is formed is positioned on the front side in the axial direction with respect to one end of the rotary valve body, the axial dimension of the valve casing becomes longer. Therefore, there is a problem that the gas valve device is enlarged.

JP 2011-256915 A

  In view of the above points, an object of the present invention is to provide a gas valve device that can be reduced in size by reducing the axial dimension of the valve housing.

  In order to solve the above-described problems, the present invention provides a valve casing, an operation shaft having an operation knob fixed to one end, and an other end inserted into an opening of one end of the valve casing. A gas valve device comprising: a rotary valve body in a valve housing that rotates in conjunction with a pivoting operation of a shaft to vary a gas flow rate; and a stopper means that limits a pivoting range of the operating shaft. , Comprising a stopper protrusion formed on the inner peripheral surface of the opening at one end of the valve casing and projecting radially inward, and a stopper member inserted in the opening at one end of the valve casing that rotates in conjunction with the operation shaft The valve housing is formed with a stopper protrusion at one end of the opening in which the rotation range of the operating shaft is limited by the claw provided on the stopper member coming into contact with the stopper protrusion from the circumferential direction. It is formed so that the part overlaps one end of the rotary valve body in the axial direction. The other end portion of the operating shaft is integrally formed with an engaging portion that engages with one end portion of the rotary valve body so as to be relatively movable in the axial direction but not relatively rotatable, and the stopper member is one end portion of the rotary valve body. It is composed of an annular plate-like member that is inserted in the axial direction at a position adjacent to the operation shaft so as to be relatively movable in the axial direction and non-rotatable, and is bent in the axial direction at a part of the outer peripheral edge of the plate-like member. A bent piece to be a claw portion is formed.

  According to the present invention, the rotational force is directly transmitted from the operation shaft to the rotary valve body, and the plate member as the stopper member is rotated in conjunction with the rotation of the operation shaft, so that the claw portion formed on the plate member is formed. The rotation range of the operation shaft is limited by the bent piece coming into contact with the stopper protrusion from the circumferential direction. In the present invention, since the portion that forms the stopper projection at the opening at one end of the valve casing overlaps in the axial direction with one end of the rotary valve body, the portion that forms the stopper projection at the opening at one end of the valve casing However, the axial dimension of the valve housing can be shortened and the gas valve device can be downsized as compared with the conventional example which is positioned on the nearer side in the axial direction than one end of the rotary valve body.

The perspective view of the gas valve apparatus of embodiment of this invention. The cutting | disconnection side view of the gas valve apparatus of embodiment. The perspective view of the decomposition | disassembly state of the principal part of the gas valve apparatus of embodiment.

  1 and 2, reference numeral 1 denotes a gas valve device according to an embodiment of the present invention applied to a gas stove. This gas valve device 1 has a valve housing 2 that is long in the front-rear direction, and an operation knob (not shown) fixed to one end (front end), and the other end (rear end) is one end (front end) of the valve housing 2. The operation shaft 3 is inserted into the opening 21 and can be freely rotated. The electromagnetic safety valve 4 is housed in the rear portion of the valve housing 2. The operation shaft 3 is housed in the front portion of the valve housing 2. The rotary valve body 5 that rotates in conjunction with the gas flow rate is adjusted between the fire extinguishing position where the rotary valve body 5 is fully closed and the ignition position where the rotary valve body 5 is fully open. And a flow path block 7 attached to the outer surface of the valve housing 2. In addition, an electromagnetic valve 71 is incorporated in the flow path block 7, and when the electromagnetic valve 71 is closed, gas is supplied to the burner only through the orifice 72 in parallel therewith.

  The valve housing 2 has a gas inlet 22 communicating with the storage space of the electromagnetic safety valve 4, a valve hole 23 between the storage space of the electromagnetic safety valve 4 and the storage space of the rotary valve body 5, and the storage of the rotary valve body 5. A gas outlet 24 that communicates the space and the gas flow path in the flow path block 7 is formed. Further, in the valve housing 2, a longitudinal pressing rod 31 penetrating the rotary valve body 5 and contacting the rear end of the operation shaft 3 is provided in the front-rear direction. The valve element 41 of the electromagnetic safety valve 4 is pushed to the valve opening position that opens the valve hole 22 through the pressing rod 31.

  A support frame 25 for inserting and supporting the operation shaft 3 is attached to the front end of the valve housing 2. The support frame 25 is formed in a substantially U-shaped cross section having a front plate portion 25a, a rear plate portion 25b, and a connecting plate portion 25c between both plate portions 25a and 25b. Then, the micro switch 8 is attached to the rear plate portion 25b, and the cam 81 is inserted between the front plate portion 25a and the rear plate portion 25b so as to be relatively movable in the axial direction and non-rotatable relative to the operation shaft 2. When the operating shaft 2 is rotated to a predetermined ignition position, the protrusion 81a (see FIG. 3) on the peripheral surface of the cam 81 comes into contact with the detection lever portion of the micro switch 8, and the micro switch 8 It is turned on so that the burner is ignited. In addition, the microswitch 8 is covered from the upper side by the connecting plate portion 25 c so that the simmered juice does not reach the microswitch 8.

  Referring to FIG. 3, the stopper means 6 is a part of the inner peripheral surface of the opening 21 at one end (front end) of the valve housing 2, specifically, in the radial direction formed at two locations separated by 180 °. The stopper protrusion 61 protrudes in the direction and the stopper member 62 inserted into the opening 21 at one end of the valve housing 2 that rotates in conjunction with the operation shaft 3. The claw portion 62a provided on the stopper member 62 abuts against the stopper projection 61 from one side and the other side so that the rotation range of the operation shaft 3 is limited.

  Here, in the present embodiment, the valve housing 2 is formed such that a portion where the stopper protrusion 61 of the opening 21 at one end thereof is formed overlaps one end (front end) of the rotary valve body 5 in the axial direction. At the same time, the other end (rear end) of the operation shaft 3 is integrally formed with an engaging portion 3a that engages with one end of the rotary valve body 5 so as to be relatively movable in the axial direction but not relatively rotatable. . An axial split groove 51 is formed at one end of the rotary valve body 5, and the engaging portion 3 a is formed by a radial projection that engages with the split groove 51.

  The stopper member 62 is an annular plate-like member that is externally attached to the operation shaft 3 so as to be relatively movable in the axial direction and not to be relatively rotatable at a position adjacent to one end of the rotary valve body 5. . Then, a bent piece that becomes a claw portion 62a bent in the axial direction (rear) is formed at a part of the outer peripheral edge of the plate-like member 62 serving as the stopper member, specifically, at two positions separated by 180 °. . The plate-like member 62 is formed with an engagement hole 62b having a hole edge portion through which the engagement portion 31 of the operation shaft 3 is inserted and a D-cut surface 3b formed on the peripheral surface of the operation shaft 3 is in contact. ing. Therefore, even if the engaging portion 3a is pulled out forward of the engaging hole 62b by pushing the operating shaft 2, the D-cut surface 3b is engaged with the edge of the engaging hole 62b and the plate-like member 62 is operated. It rotates together with the shaft 3.

  In addition, a step portion facing forward is provided in each of the outer peripheral surface portion and the inner peripheral surface portion near the one end portion of the rotary valve body 4, and between the outer peripheral surface step portion and the plate-like member 62, A spring 63 that presses the plate-like member 62 against the support frame 25 and pushes the rotary valve body 4 into the valve housing 2 is interposed between the stepped portion on the inner peripheral surface and the flange portion at the front end of the pressing rod 31. A spring 32 is provided to urge the rod 31 and the operation shaft 3 forward.

  Further, a protrusion 3c having a width narrower than that of the protrusion 3a is provided on the front surface of the protrusion 3a as an engaging portion of the operation shaft 3. When the operation shaft 3 is rotated and returned to the fire extinguishing position, the protrusion 3c is fitted into a slit-shaped hole (not shown) formed in the rear plate portion 25b of the support frame 25 so that the operation shaft 3 is extinguished. When the operation shaft 3 is pushed against the urging force of the spring 32, the protrusion 3c comes out of the hole and the rotation of the operation shaft 3 is released.

  Here, according to the present embodiment, the rotational force is transmitted from the operation shaft 3 to the rotary valve body 5 through the engaging portion 3 a formed integrally therewith, and in conjunction with the rotation of the operation shaft 3. The plate-like member 62 that is a stopper member rotates, and the bent piece 62 a that is a claw formed on the plate-like member 62 abuts against the stopper protrusion 61 from the circumferential direction, so that the rotation range of the operation shaft 3 is limited. Furthermore, in this embodiment, the portion of the opening 21 at one end of the valve housing 2 that forms the stopper protrusion 61 overlaps the one end of the rotary valve body 5 in the axial direction. Compared to the conventional example in which the portion where the protrusion is formed is positioned on the near side in the axial direction with respect to one end of the rotary valve body, the axial dimension of the valve housing 2 is shortened, and the gas valve device 1 can be downsized. Can be planned.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above embodiment, the flow path block 7 joined to the outer surface of the valve housing 2 is provided, but the flow path block 7 may be omitted.

  DESCRIPTION OF SYMBOLS 1 ... Gas valve apparatus, 2 ... Valve housing, 21 ... Opening part of one end of valve housing, 3 ... Operation shaft, 3a ... Engagement part, 5 ... Rotary valve body, 6 ... Stopper means, 61 ... Stopper protrusion, 62 ... Stopper member, plate-like member, 62a ... claw portion, bent piece.

Claims (1)

An operation knob is fixed to the valve casing and one end, and the other end is inserted into the opening of one end of the valve casing. A gas valve device comprising a rotary valve body in a valve housing that varies a gas flow rate, and stopper means that limits a rotation range of an operation shaft,
The stopper means has a stopper projection that protrudes inward in the radial direction formed in a part of the inner peripheral surface of the opening at one end of the valve casing, and an opening at one end of the valve casing that rotates in conjunction with the operation shaft. It is composed of an inserted stopper member, and the claw portion provided on the stopper member comes into contact with the stopper projection from the circumferential direction so that the rotation range of the operation shaft is limited.
The valve housing is formed so that the portion where the stopper protrusion of the opening at one end is formed overlaps with the one end of the rotary valve body in the axial direction,
On the other end of the operating shaft, an engaging portion is formed integrally with one end of the rotary valve body so as to be relatively movable in the axial direction and not relatively rotatable.
The stopper member is composed of an annular plate-like member that is externally attached to the operation shaft so as to be relatively movable in the axial direction and non-rotatable at a position adjacent to one end of the rotary valve body. A gas valve device, characterized in that a bent piece that is a claw portion bent in the axial direction is formed on a part of the periphery.

Images