JP3957306B2 - Gas stopper - Google Patents

Description

  The present invention relates to a gas stopper that opens and closes a gas pipe connected to a gas device. In particular, the present invention relates to a gas stopper that has been improved to minimize the number of parts.

The background art will be described with reference to FIG.
FIG. 5 is an exploded perspective view showing a component configuration of a gas stopper disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-2361).
The gas stopper 201 shown in FIG. 5 includes seven parts: a countersunk screw 202, a handle 203, a seal 204, a lock pin 205, a coil spring 206, a main body 207, and a stopper 209. The main body 207 is formed with a gas flow path having a tapered conical frustum-shaped plug sliding surface, an inlet side connected to a gas main pipe, an outlet side connected to a gas device, etc. (not shown). Yes. In the main body 207, a plug body 209 having a circulation hole 209c is rotatably housed. When this communication hole 209c is aligned with the gas flow path of the main body 207, gas flows, and when the communication hole 209c is out of the gas flow path, the gas is blocked.

  A handle 203 is provided above the plug 209 via a coil spring 206. The handle 203 is rotatably connected to the upper end portion of the main body 207 by a lock pin 205. In a connected state of the main body 207 and the handle 203, the coil spring 206 biases the plug 209 toward the inside of the main body 207. The lock pin 205 is inserted into the handle 203 and both ends thereof engage with the circumferential groove 207 c of the main body 207. The lock pin 205 is prevented from coming off when the lower end of the countersunk machine screw 202 tightened from the upper end of the handle 203 hits. In such a gas stopper 201, when the handle 203 is pushed and turned manually, the stopper 209 rotates in the main body 207, and the gas flow path is opened and closed.

JP 2000-2361 A (FIG. 3)

However, there is a demand for a gas stopper with a smaller number of parts and a lower manufacturing cost.
The present invention has been made to solve such problems, and an object of the present invention is to provide a gas stopper having a small number of parts and a low manufacturing cost.

The gas stopper of the present invention includes a main body having a gas flow path and a plug body sliding surface therein, a plug body that slides on the plug body sliding surface to open and close the gas flow path, and an end of the main body A handle for moving the plug body, a spring for urging the plug body into the body, and the main body. the handle is pivotally connected to the, a gas valve comprising a handle key which rotates integrally with the handle, and the Handoruki over said handle, a locking portion for preventing both separation The handle key is inserted into the handle, and both end portions of the key are engaged with annular inner grooves formed at the end portions of the main body. In a state where the handle and the handle key are locked, the key end surface and the main body Wherein the predetermined clearance is secured between the annular groove end surface.

  According to this gas stopper, the locking portion is provided between the handle and the handle key that rotatably connects the handle to the main body, and the locking portion can prevent separation of the handle and the handle key. .

In the gas stopper of the present invention, the handle key is inserted through the handle,
Both end portions of the key are engaged with an annular inner groove formed at an end portion of the main body, and the key end surface and the handle key are engaged with the handle and the handle key at the engagement portion. predetermined clearance between the annular groove end surface of the body is Ru is ensured.
When such a clearance is secured, the end face of the key does not hit the end face (groove bottom face) of the inner groove. Therefore, the key end surface and the inner groove end surface are not rubbed with each other when the handle is rotated, and chips are not generated, or the key end surface hits the inner groove end surface and the handle does not easily rotate.

In the gas stopper according to the present invention, the upper end of the spring is in contact with the handle and the lower end is in contact with the stopper, and the handle key slides against the upper end surface of the annular inner groove of the main body when the handle rotates. can do.
In this case, it is possible to realize a structure for connecting the handle to the main body by the handle key while securing the biasing force of the plug body into the main body by the spring.

In the gas stopper according to the present invention, the upper end edges at both ends of the handle key may be formed in a smooth round shape.
In this case, it is possible to reduce the possibility that chips are generated when the upper end edge of the handle key hits the upper end surface of the annular inner groove of the main body. In particular, the band-like handle key can reduce the generation of chips compared to a round bar-like pin.

  According to the present invention, it is possible to provide a gas stopper having a small number of parts and a low manufacturing cost.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing the overall configuration of a gas stopper according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which the main body of the gas stopper is viewed from the direction of arrow X in FIG.
FIG. 3A is an exploded perspective view showing the handle of the gas stopper as viewed from the lower side of FIG. 1, and FIG. 3B is a plan view showing the back side of the handle.
FIG. 4 is a cross-sectional view showing a configuration when the gas stopper is opened.

  The gas plug 1 shown in FIG. 1 is roughly divided into five parts, a main body 10, a plug body 20, a coil spring 30, a handle key 40, and a handle 50. The handle seal 60 is for closing a hole (a slit hole 52 to be described later) on the side surface of the handle 50, and is used to close a screw hole or a pin hole in the conventional gas stopper (described above). It plays the same role as the seal 204 in FIG. Since the gas plug 1 has a structure in which the handle 50 is connected to the main body 10 with the handle key 40, the number of fastening members such as screws can be reduced as compared with the conventional gas plug, and the manufacturing cost can be reduced. Yes.

Hereinafter, each component of the gas stopper 1 will be described in detail.
The main body 10 is made of brass or the like, and has a central upper end portion 11 to which the handle 50 is attached, an inlet side portion 13 connected to the gas source pipe side, and an outlet side portion 12 connected to the gas equipment side. As shown in FIG. 4, a gas flow path 14 is formed between the entry side portion 13 and the exit side portion 12 inside the main body 10. A moving surface 15 is formed. Further, an inner recess 17 that is open to the central upper end 11 side is formed on the upper side of the plug sliding surface 15. An annular inner groove 19 is formed in the inner surface of the inner recess 17 of the central upper end 11. As shown in FIGS. 1 and 2, a slit hole 11A (see FIG. 2) connected to the annular inner groove 19 is formed in the central upper end portion 11 of the main body 10, and a notch cut out in an arc shape. A step portion 11B is formed. 11 A of slit holes are formed in the magnitude | size in which the handle key 40 can be penetrated.

  As shown in FIG. 4, a plug body 20 made of brass or the like is rotatably housed inside the plug body sliding surface 15 of the main body 10. The outer peripheral surface 20 a of the plug body 20 is in close contact with the plug body sliding surface 15. The plug body 20 is formed with a gas flow hole 21 penetrating the side surface. When the gas flow hole 21 is aligned with the gas flow path 14 of the main body 10 (as shown in FIG. 4), the gas flows. When the gas flow hole 21 is out of the gas flow path 14, the gas is blocked. The A protrusion 23 is formed on the upper end surface of the plug body 20. A recess 25 is formed around the protrusion 23 on the upper end surface of the plug body 20. In the assembled state of the gas stopper, the coil spring 30 is disposed around the protrusion 23, and the lower end of the coil spring 30 hits the recess 25.

  The handle key 40 is a strip-shaped member made of brass or the like, and connects the handle 50 to the main body 10 so as to be rotatable. Both end surfaces 40a of the handle key 40 are formed in a smooth rounded surface shape. Furthermore, the length of the handle key 40 is shorter than the inner diameter of the annular inner groove 19 of the main body 10. In the gas stopper assembly state, both end portions of the handle key 40 are disposed in the annular inner groove 19 of the main body 10, but the length of the handle key 40 is shorter than the diameter of the annular inner groove 19. 40a does not hit the end face (groove bottom face) of the inner groove 19, and a clearance t (see FIG. 4) is secured between them. Therefore, when the handle 50 is rotated, both end surfaces 40a of the key 40 rub against the end surface of the inner groove 19 to generate chips, or the both end surfaces 40a of the key 40 hit the end surface of the inner groove 19 and the handle 50 is difficult to rotate. It will never become.

  As shown in FIGS. 1 and 3, a locking projection 43 is formed on a part of the side surface of the handle key 40. In the gas stopper assembly state, the locking projection 43 is locked to a locking cut 58 of the handle 50 described later (see an imaginary line in FIG. 3A). Since the locking projection 43 is locked to the locking cut 58, the handle 50 and the handle key 40 can be prevented from being separated after the gas stopper 1 is assembled.

  Such a handle key 40 is formed, for example, by punching a plate material. When the handle key 40 is punched, burrs are generated on the punch side edge of the punched handle key 40 and sag occurs on the die side edge, but when the gas stopper is assembled, the sag side of the handle key 40 is Try to face up. The chamfered radius of the edge on the sag side is, for example, about 0.5 mm. By doing so, it is possible to reduce the possibility that the upper end edge of the handle key 40 hits the upper end surface of the annular inner groove 19 of the main body 10 and chips are generated.

A handle 50 made of plastic or the like is attached to the central upper end portion 11 of the main body 10. A mark 50 a for identifying the opening / closing position of the plug body 20 is formed on the upper surface of the handle 50. As easily shown in FIG. 3, a circumferential groove 53 is dug in the outer peripheral edge on the lower surface side of the handle 50, and a convex portion 54 is formed in a part of the circumferential groove 53. The convex portion 54 hits both end surfaces 11B′11B ″ (see FIG. 1) of the notch step portion 11B of the central upper end portion 11 described above, so that the rotation range of the plug body 20 is limited.
In addition, about the mechanism which controls the rotation range by the convex part 54 of the handle | steering-wheel 50 and the notch step part 11B of the main body 10, the same form as Japanese Patent Application No. 2004-86463 by this applicant is used. it can.

  As shown in FIG. 3, an annular groove 56 is dug into the protrusion 55 (inside the circumferential groove 53) at the center portion on the lower surface side of the handle 50. A plug engaging hole 57 a that engages with the protrusion 23 of the plug body 20 is formed in the middle protrusion 57 inside the annular groove 56. A part of the bottom surface of the annular groove 56 is formed at predetermined intervals, and the remaining part is a convex seat 56a. In the gas stopper assembly state, the upper end of the coil spring 30 hits the convex seat 56a.

  A slit hole 52 through which the handle key 40 is passed is formed in a part of the side surface of the handle 50, and a key arrangement groove 59 in which the handle key 40 after assembly is arranged is formed in the protrusion 55 of the handle 50. . As shown in FIGS. 3 and 4, the key arrangement groove 59 is formed so as to penetrate the projection 55 in the radial direction on the back side (upper end surface side of the handle 50) from the middle projection 57. Further, as shown in FIG. 3, a locking cut 58 is formed in the annular groove 56 at the side of the key arrangement groove 59. The locking cut 58 is formed by digging a part of the bottom of the annular groove 56 so as to extend from the side of the key arrangement groove 59 to the annular groove 56 side. The cut width h (see FIG. 3B) of the locking cut 58 is substantially equal to the width of the locking projection 43 of the handle key 40, and is about 1 mm as an example. As described above, in the gas stopper assembly state, the locking projection 43 of the handle key 40 is locked to the locking cut 58 (see the phantom line in FIG. 3A).

  In the gas stopper assembly state shown in FIG. 4, the central upper end 11 of the main body 10 is disposed in the circumferential groove 53 of the handle 50. The protrusion 55 of the handle 50 is disposed inside the inner recess 17 of the main body 10, and the plug engagement hole 57 a of the middle protrusion 57 is engaged with the protrusion 23 of the plug body 20. The coil spring 30 is disposed outside the intermediate projection 57 and the projection 23 between the concave portion 25 of the plug body 20 and the convex seat 56 a of the annular groove 56 of the handle 50. The entire handle key 40 is inserted into the key arrangement groove 59 of the handle 50, and both ends are arranged in the annular inner groove 19 of the main body 10. In this state, the handle key 40 is pushed upward under the urging force of the coil spring 30, and the upper end edge of the key 40 hits the upper end surface of the inner groove 19. As a result, the handle 50 and the plug body 20 are connected to each other so that they cannot rotate relative to each other, and the handle 50 and the main body 10 can be rotated via the handle key 40. When the handle 50 is rotated, the handle key 40 slides while hitting the upper end surface of the annular inner groove 19 of the main body 10.

Next, assembly procedures (1) to (5) of the gas stopper 1 will be described.
(1) Insert the plug 20 into the main body 10.
(2) The lower end of the coil spring 30 is disposed in the circular groove 25 around the protrusion 23 of the plug body 20.
(3) The annular groove 56 of the handle 50 is disposed at the upper end of the coil spring 30, and the handle 50 is pushed into the main body 10 while the coil spring 30 is contracted between the plug 20 and the handle 50. Then, the protrusion 23 of the plug body 20 is engaged with the plug engagement hole 57 a of the handle 50. At this time, alignment is performed so that the slit hole 11A (see FIG. 2) in the central upper end portion 11 of the main body 10 and the slit hole 52 (see FIG. 1) on the side surface of the handle 50 coincide.
In the state where (3) is completed, the convex portion 54 of the handle 50 is disposed inside the notch step portion 11B of the main body 10 (for details, see Japanese Patent Application No. 2004-86463 described above).

(4) The handle key 40 is inserted into the slit hole 52 on the side surface of the aligned handle 50 and the slit hole 11A of the main body 10. The handle key 40 is first inserted by hand and finally pushed in with a tool or the like in a state where the locking projection 43 faces the rear end side (see FIGS. 1 and 3). When the handle key 40 reaches the push-in completion position, the locking projection 43 of the handle key 40 is locked to the locking cut 58 of the handle 50 (see the phantom line in FIG. 3A), and both end portions of the handle key 40 Is disposed in the annular inner groove 19 of the main body 10 (see FIG. 4). At this time, since the length of the handle key 40 is shorter than the diameter of the annular inner groove 19 as described above, a clearance t is ensured between the both end faces 40 a of the key 40 and the end face of the inner groove 19.
In the state where (4) is completed, the handle 50 is urged toward the upper end side of the main body 10 by the elastic force of the coil spring 30, the handle key 40 hits the upper end surface of the annular inner groove 19 of the main body 10, and the handle 50 and the main body 10 are connected.

(5) A handle seal 60 is attached to the slit hole 52 on the side surface of the handle 50.
As can be seen from the procedures (3) and (4) described above, the gas plug 1 can be assembled to the main body 10 by contracting the coil spring 30 while pushing the handle 50 manually.

It is a disassembled perspective view which shows the whole structure of the gas stopper which concerns on one Example of this invention. It is a perspective view which shows the state which looked at the main body of the gas stopper from the arrow X direction of FIG. FIG. 3A is an exploded perspective view showing the handle of the gas stopper as viewed from the lower side of FIG. 1, and FIG. 3B is a plan view showing the back side of the handle. It is sectional drawing which shows the structure at the time of opening of the gas stopper. It is a disassembled perspective view which shows the components structure of the gas stopper disclosed by patent document 1 (Unexamined-Japanese-Patent No. 2000-2361).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas plug 10 Main body 11 Center upper end part 11A Slit hole 11B Notch step part 14 Gas flow path 15 Plug body sliding surface 19 Annular inner groove 20 Plug body 21 Communication hole 30 Coil spring 40 Handle key 40a End surface 43 Locking convex part 50 Handle 52 Slit hole 53 Circumferential groove 54 Protrusion 55 Protrusion 56 Annular groove 58 Engagement cut 59 Key arrangement groove t Clearance h (between the key end surface and the annular inner groove end surface) Width (of the engagement cut)

Claims (3)

A main body having a gas flow path and a plug sliding surface inside;
A plug that slides on the plug sliding surface and opens and closes the gas flow path;
A handle for moving the plug body, which is rotatably attached to an end portion of the main body, and is engaged with the plug body so as not to be relatively rotatable.
A spring for biasing the plug body into the main body;
A handle key for pivotally connecting the handle to the main body and rotating integrally with the handle;
A gas stopper comprising:
The Handoruki over said handle, a locking portion for preventing both separation are formed respectively,
The handle key is inserted through the handle,
Both ends of the key are engaged with an annular inner groove formed at the end of the main body,
A gas stopper, wherein a predetermined gap is secured between the key end surface and the annular inner groove end surface of the main body in a state where the handle and the handle key are locked by the locking portion. The upper end of the spring is in contact with the handle and the lower end is in contact with the plug, and when the handle is rotated, the handle key slides while hitting the upper end surface of the annular inner groove of the main body. The gas stopper according to 1 . The gas stopper according to claim 1 or 2, wherein upper ends of both ends of the handle key are formed in a smooth round shape.

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