JP2005273738A - Gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cock which offers easy assembly and low manufacturing cost. <P>SOLUTION: The gas cock 1 comprises six parts of a body 10, a cock body 20, a coil spring 30, a stopper 40, a knob 50 and a screw 60, which requires a less number of parts in comparison with a conventional gas cock. When assembling the gas cock 1, the coil spring 30 is compressed to be assembled in the body 10 with a stopper 40 manually pressed. Therefore, no dedicated tool is required in assembly which leads to simple assembling work. In the gas cock 1, a drive shaft having a complex shape is eliminated. Restriction on a turning range of the cock body 20 can be made by a protrusion 54 of the knob 50 and a notched stepped part 11B of the body 10, which leads to manufacturing cost reduction of the gas cock 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas stopper that opens and closes a gas pipe connected to a gas device.

The background art will be described with reference to FIGS. 9 and 10.
FIG. 9 is a cross-sectional view showing an example of a gas stopper with a pushing mechanism.
FIG. 10 (A) is an exploded perspective view showing the component configuration of the gas stopper disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-2361), and FIG. 10 (B) shows the component configuration of the gas stopper shown in FIG. It is a disassembled perspective view shown.
A gas stopper 101 shown in FIGS. 9 and 10B includes a main body 107. A gas flow path 108 is formed in the main body 107. In FIG. 9, the left side of the gas flow path 108 of the main body 107 is an inlet side portion 107A connected to a gas main pipe, and the right side is an outlet side portion 107B connected to a gas device. In the gas flow path 108 in the main body 107, a tapered sliding surface 108X having a tapered truncated cone shape is formed.

  A plug 109 is housed in the main body 107 so as to be rotatable. The side surface 109 a of the plug body 109 is in close contact with the plug body sliding surface 108 </ b> X in the main body 107. An elbow-shaped communication hole 109 c is formed in the plug body 109. When the communication hole 109c is aligned with the gas flow path 108 of the main body 107, gas flows, and when the communication hole 109c is out of the gas flow path 108, the gas is blocked. A drive shaft 115 is disposed above the plug 109 via a coil spring 106. A knob 103 is connected to the upper portion of the drive shaft 115 by a flat head screw 102.

  The drive shaft 115 is urged upward in the figure by a coil spring 106, and connects the knob 103 and the plug 109 so that they cannot rotate and can be vertically spaced. When the knob 103 is pushed and turned manually, the plug 109 is rotated in the main body 107 and the gas plug 101 is opened and closed. A shoulder 115a (see FIG. 10B) is formed on the upper side of the drive shaft 115, and a stopper 113 and a C-type retaining ring 111 are provided on the outer edge. The stopper 113 has a locking hole 113a (see FIG. 10B) that prevents the drive shaft 115 from rotating when the drive shaft 115 is positioned on the upper side in FIG. The C-type retaining ring 111 enters the inner groove 107a of the main body 107 and presses the stopper 113 from above.

  In order to open the gas plug 101 having such a configuration, the knob 103 is manually pushed down and the drive shaft 115 is moved down against the urging force of the coil spring 106. Then, the drive shaft 115 comes down from the locking hole 113a of the stopper 113, and the knob 103 becomes rotatable. When the knob 103 is pushed and turned manually, the plug body 109 also rotates in the main body 107 at the same time, and the gas flow path 108 of the main body 107 and the communication hole 109c of the plug body 109 are aligned to circulate the gas. On the other hand, when the gas stopper 101 is closed and the human hand is released, the drive shaft 115 receives the urging force of the coil spring 106 and moves upward, and the shoulder 115a enters the locking hole 113a of the stopper 113. At this time, the drive shaft 115, the plug 109, and the knob 103 cannot be rotated.

  By the way, the above-described gas stopper 101 with the pushing mechanism shown in FIGS. 9 and 10B basically has eight parts (counter machine screw 102, knob 103, coil spring 106, main body 107, stopper body 109, C The stopper ring 111, the stopper 113, and the drive shaft 115) are configured. However, in a gas stopper that does not require a pushing mechanism, there is an intention to reduce the number of parts as much as possible. Therefore, the present applicant has proposed a gas plug 201 as shown in FIG. 10A in Patent Document 1 (Japanese Patent Laid-Open No. 2000-2361). The gas stopper 201 includes seven parts, a countersunk screw 202, a knob 203, a seal 204, a lock pin 205, a coil spring 206, a main body 207, and a stopper 209. Compared to the gas stopper 101, the gas stopper 201 has a C-shaped stopper. The wheel 111, the stopper 113, and the drive shaft 115 are not provided.

JP 2000-2361 A (FIG. 3)

However, there is a need for a gas stopper that is easier to assemble and has a lower manufacturing cost.
The present invention has been made to solve such a problem, and an object of the present invention is to provide a gas stopper that is easy to assemble and has 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 A gas stopper comprising: a spring that biases the body, a stopper that locks the spring in the main body, a knob that moves the stopper, and a coupling member that couples the knob and the stopper The knob is rotatably attached to an end of the main body, and is engaged with the plug body so as not to rotate relative to the main body. An engagement portion is provided to limit the rotation range of the plug body.

  Since this gas plug is composed of six parts including a main body, a plug, a spring, a stopper, a knob, and a coupling member (such as a screw), the number of parts can be reduced as compared with a conventional gas plug. Since this gas stopper has a structure in which the spring is pressed by assembling the stopper to the main body, the drive shaft and the C type are compared with the conventional structure in which the spring is pressed by the C-type retaining ring via the stopper and the drive shaft. Reduction of two parts of the retaining ring is realized. Also, when assembling the gas stopper, the spring can be retracted and assembled to the main body while pushing the stopper manually, so it is necessary to press the C-type retaining ring with a dedicated tool across the stopper and drive shaft as in the past. Disappear. That is, the gas plug does not require a dedicated tool for assembling, and the assembling work is simplified. Furthermore, conventionally, since the drive shaft is limited in the rotation range of the plug, the shape of the drive shaft is complicated and the manufacturing cost increases. This gas stopper reduces the drive shaft with a complicated shape and limits the rotation range of the stopper at the engaging part between the knob and the main body. obtain.

  According to the present invention, it is possible to provide a gas stopper that is easy to assemble and low in 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 a cross-sectional view showing the entire configuration (when closed) of a gas stopper according to an embodiment of the present invention.
FIG. 2 is an exploded view of the gas stopper. (A) is a top view in a capping position, (B) is a cross-sectional side view in a capping position.
FIG. 3 is a cross-sectional view showing the entire configuration of the gas stopper (when opened).
FIG. 4 is an exploded view of the gas stopper. (A) is a top view in an opening position, (B) is a cross-sectional side view in an opening position.

  1 to 4 show the overall structure of a gas plug 1 according to an embodiment of the present invention. As easily shown in FIGS. 2 and 4, the gas stopper 1 is composed of six parts: a main body 10, a stopper 20, a coil spring 30, a stopper 40, a knob 50, and a screw (coupling member) 60. A rivet or the like can be used instead of the screw 60.

The main body 10 is made of brass or the like, and has an upper end portion 11 to which the knob 50 is attached, an inlet side hole portion 12 connected to a gas main pipe, and an outlet side hole portion 13 connected to a gas device. Inside the main body 10, a gas flow path 14 is formed between the inlet-side hole 12 and the outlet-side hole 13, and a tapered truncated cone-shaped plug sliding surface 15 is formed in the gas flow path 14. Has been. Furthermore, an inner recess 17 that is open to the upper end 11 side of the main body 10 is formed on the upper side of the plug sliding surface 15. In the upper end portion 11 of the main body 10, an inner peripheral groove portion 19 is formed on the inner edge of the upper end of the inner recess portion 17. As easily shown in FIGS. 2A and 4A, the upper end portion 11 of the main body 10 is formed with a pair of slit portions 11A connected to the inner peripheral groove portion 19 and a circle having an opening degree of 90 °. A notch step portion 11B that is cut out in an arc shape is formed.
In addition, the effect | action of 11 A of slit parts and the notch step part 11B is mentioned later.

  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 (see FIGS. 3 and 4), the gas flows, and when the gas flow hole 21 is out of the gas flow path 14 (see FIGS. In FIG. 2), the gas is shut off. As clearly shown in FIG. 2, a pair of protrusions 23 are formed on the upper end surface of the plug body 20. A space 23A exists between the opposing surfaces of both the protrusions 23, and a circular groove (a concave portion forming a circumferential surface) 25 is formed in the plug shaft core portion in the space 23A. A coil spring 30 is disposed in the circular groove 25 between the protrusions 23.

As shown in FIGS. 1 and 3, a stopper 40 made of stainless steel or the like is disposed at the upper end of the coil spring 30. As clearly shown in FIGS. 2A and 4A, the stopper 40 is a belt-like member. On both side surfaces of the stopper 40, projecting pieces 41 projecting outward are formed. In the assembled state shown in FIGS. 1 and 3, each protruding piece 41 of the stopper 40 is disposed in the inner peripheral groove portion 19 of the main body 10. At this time, the stopper 40 is urged toward the upper end side of the main body 10 by the elastic force of the coil spring 30, but is prevented from coming off when each projecting piece 41 hits the upper end surface of the inner circumferential groove portion 19. The corners of the stopper 40 (ends on both sides across each overhanging piece 41) are formed in a smooth rounded shape. A small circular screw engaging hole 43 is formed at the center of the stopper 40, and a pair of substantially hook-shaped knob engaging holes 45 are formed on both sides of the screw engaging hole 43.
The engagement state between the main body 10 and the stopper 40 will be described later.

  A plastic knob 50 is attached to the upper end 11 of the main body 10. A screw hole 51 penetrating vertically is dug in the center on the upper surface side of the knob 50. On the upper surface of the knob 50, a mark 50a for identifying the opening / closing position of the plug 20 is formed. On the other hand, a circumferential groove 53 is dug in the outer peripheral edge on the lower surface side of the knob 50, and a convex portion 54 (see FIG. 7A described later) is formed in a part of the circumferential groove 53. Yes. The projecting portion 54 abuts on both end surfaces 11B′11B ″ of the notch step portion 11B of the upper end portion 11 of the main body 10 to limit the rotation range of the plug body 20. Further, on the lower surface side of the knob 50, a screw is provided. A pair of engaging protrusions 55 are formed between the hole 51 and the circumferential groove 53.

  In the assembled state shown in FIGS. 1 and 3, the upper end portion 11 of the main body 10 is disposed in the circumferential groove 53 of the knob 50. Further, each engagement protrusion 55 of the knob 50 protrudes downward through each knob engagement hole 45 of the stopper 40 and engages with a space 23 </ b> A between both protrusions 23 of the plug body 20. Thereby, the knob 50 and the plug 20 are connected through the stopper 40 so as not to be relatively rotatable. Then, when the screw 60 is screwed into the screw hole 51 of the knob 50, the knob 50 and the stopper 40 are coupled so as not to be relatively rotatable.

Next, the assembly procedures (1) to (6) of the gas stopper 1 will be described with reference to FIG.
5A to 5F are plan views for explaining a procedure for assembling the stopper to the main body.
(1) As shown in FIG. 5 (A), the plug 20 is inserted into the main body 10. At this time, the line C1 connecting the center of the main body 10 and both the slit portions 11A and the space 23A width direction center line C2 of the plug body 20 form a predetermined angle θ (about 60 °).
(2) As shown in FIG. 5B, a coil spring 30 is disposed in a circular groove 25 between both protrusions 23 of the plug body 20.

(3) As shown in FIG. 5C, the overhanging pieces 41 of the stopper 40 are aligned with the slit portions 11A of the upper end portion 11 of the main body 10, and the coil spring 30 is contracted between the stopper 40 and the plug body 20. Meanwhile, the stopper 40 is pushed into the main body 10.
(4) As shown in FIG. 5D, the stopper 40 is rotated by a predetermined angle along the inner circumferential groove portion 19 of the main body 10. At this time, both the knob engaging holes 45 of the stopper 40 are positioned on the space 23A of the stopper 20. At this time, as described above, the stopper 40 is urged toward the upper end side of the main body 10 by the elastic force of the coil spring 30, but is prevented from coming off when each projecting piece 41 hits the upper end surface of the inner peripheral groove portion 19.
As can be seen from the procedures (3) and (4), in the gas plug 1, the coil spring 30 can be contracted and assembled to the main body 10 while pushing the stopper 40 manually. Therefore, it is not necessary to press the C-type retaining ring with a dedicated tool across the stopper and the drive shaft as in the conventional case, and the assembling work is simplified.

(5) As shown in FIG. 5 (E), the knob 50 is fitted into the upper end 11 of the main body 10. Thereby, each engagement protrusion 55 of the knob 50 passes through each knob engagement hole 45 of the stopper 40 and engages with a space 23 </ b> A between both protrusions 23 of the plug body 20, and the knob 50 and the plug body 20 are connected to the stopper 40. It is connected so that relative rotation is impossible. At this time, the convex portion 54 of the knob 50 is positioned substantially at the center (near the right end in FIG. 5E) in the notch step portion 11B of the upper end portion 11 of the main body 10.
(6) As shown in FIG. 5F, the screw 60 is screwed into the screw hole 51 of the knob 50. When the lower end of the screw 60 is engaged with the screw engaging hole 43 of the stopper 40, the knob 50 and the stopper 40 are coupled so as not to be relatively rotatable.

Next, referring to FIGS. 6 to 8, the assembled state of the main body 10 of the gas stopper 1 and the stopper 40, and the notch step portion 11 </ b> B of the main body 10 and the convex part of the knob 50 when the gas stopper 1 is opened and closed. 54 (restriction of the rotation range) will be described.
FIG. 6 is a plan view showing the assembled state of the main body and stopper of the gas stopper according to the present invention and the relationship between the notch step portion of the main body and the convex part of the knob when the gas stopper is opened and closed. (A) is a figure which shows the state at the time of an assembly, (B) is a figure which shows the state at the time of closing, (C) is a figure which shows the state at the time of opening.
FIG. 7A is a perspective view showing the lower surface side of the knob of the gas stopper, FIG. 7B is a perspective view showing a state when the gas stopper is closed, and FIG. 7C is a state when the gas stopper is opened. FIG.
FIG. 8A is an exploded perspective view showing a state when the gas stopper is closed, and FIG. 8C is an exploded perspective view showing a state when the gas stopper is opened.
In FIG. 6, only the protrusions 54 and the engaging protrusions 55 of the knob are shown as meshes, and the entire knob is not shown.

  When assembling the gas stopper 1 shown in FIG. 6A, as described above with reference to FIGS. 5D to 5F, the knob engaging hole 45 of the stopper 40 (and the stopper 20 in the main body 10). The knob engaging protrusion 55 (see FIG. 7A) is engaged with the space 23A), and the knob projection 54 (see FIG. 7A) is in the notch step portion 11B of the upper end portion 11 of the main body. It is located almost at the center (near the right end in FIG. 6A). In order to change the gas stopper 1 from the state of FIG. 6A to the closed state, the knob is turned in the direction of the arrow X as shown in FIG. Then, the stopper 40 and the plug 20 that are engaged with the knob 50 also rotate in the direction of the arrow X at the same time. At this time, as easily shown in FIGS. 7B and 8A, the knob convex portion 54 moves along the arc of the notch step portion 11B of the upper end portion 11 of the main body, and finally the notch step. It hits the end face 11B 'of the part 11B. Thereby, the knob 50 becomes non-rotatable with respect to the main body 10, and the rotation restriction at the time of closing is made.

On the other hand, to bring the gas plug 1 into the open state from this state, the knob is turned in the arrow Y direction as shown in FIG. Then, the stopper 40 and the plug 20 that are engaged with the knob 50 also rotate in the direction of the arrow Y at the same time. At this time, as clearly shown in FIGS. 7C and 8B, the knob convex portion 54 moves along the arc of the notch step portion 11B of the upper end portion 11 of the main body, and finally the notch step. This hits the end surface 11B ″ of the portion 11B. As a result, the knob 50 cannot rotate with respect to the main body 10, and the rotation is restricted when the plug is opened.
As described above, in the present gas plug 1, the rotation range of the plug body 20 can be limited by the knob convex portion 54 and the notch step portion 11 </ b> B of the main body 10.

It is sectional drawing which shows the whole structure (at the time of closure) of the gas stopper which concerns on one Example of this invention. It is an exploded view of the gas stopper. (A) is a top view in a capping position, (B) is a cross-sectional side view in a capping position. It is sectional drawing which shows the whole structure (at the time of opening) of the gas stopper. It is an exploded view of the gas stopper. (A) is a top view in an opening position, (B) is a cross-sectional side view in an opening position. It is a top view for demonstrating the procedure which attaches a stopper to a main body. It is a top view which shows the assembly state of the main body and stopper of the gas stopper which concerns on this invention, and the relationship between the notch step part of a main body at the time of gas stopper opening and closing, and the convex part of a knob. (A) is a figure which shows the state at the time of an assembly, (B) is a figure which shows the state at the time of closing, (C) is a figure which shows the state at the time of opening. FIG. 7A is a perspective view showing the lower surface side of the knob of the gas stopper, FIG. 7B is a perspective view showing a state when the gas stopper is closed, and FIG. 7C is a state when the gas stopper is opened. FIG. FIG. 8A is an exploded perspective view showing a state when the gas stopper is closed, and FIG. 8C is an exploded perspective view showing a state when the gas stopper is opened. It is sectional drawing which shows an example of a gas stopper with a pushing mechanism. FIG. 10A is an exploded perspective view showing the component configuration of the gas stopper disclosed in Patent Document 1, and FIG. 10B is an exploded perspective view showing the component configuration of the gas stopper shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas plug 10 Main body 19 Inner peripheral groove part 11A Slit part 11B Notch step part 11B
14 Gas flow path 15 Plug sliding surface 19 Inner peripheral groove 20 Plug 21 Communication hole 30 Coil spring 40 Stopper 41 Overhanging piece 43 Screw engagement hole 45 Knob engagement hole 50 Knob 54 Projection 55 Engagement protrusion 60 Screw

Claims (1)

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 spring for biasing the plug body into the main body;
A stopper for locking the spring in the body;
A knob for moving the plug;
A coupling member for coupling the knob and the stopper;
A gas stopper comprising:
The knob is rotatably attached to the end of the main body, and is engaged with the plug body so as not to be relatively rotatable.
A gas stopper characterized in that an engaging portion is provided between the knob and the main body to limit a rotation range of the stopper.

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