JP3223115B2 - Gas tap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stopper having a lock mechanism for locking a handle in a closed position.

[0002]

2. Description of the Related Art A conventional gas plug of this type is disclosed, for example, in Japanese Utility Model Publication No. 60-11337. The lock mechanism of the gas stopper includes a lock member movably inserted into a mounting hole formed in the handle, a spring for urging the lock member toward the outside of the mounting hole, In order to prevent the stopper from falling off, the stopper is fixed to the opening of the mounting hole with a screw, and a movable member movably disposed in the mounting hole between the stopper and the lock member. . The lock member is movable between an engagement position abutting the stopper via the movable member, a release position on the inner side of the mounting hole from the engagement position, and a lock position further toward the inner side, In the engaged position, the handle is prevented from rotating from the closed position to the open position by engaging with the plug body. When the lock member is at the engagement position, the outer end of the movable member penetrates through the stopper and protrudes to the outside, and the end protruding to the outside pushes the lock member against the urging force of the spring. When the lock member is moved to the release position, the engagement between the lock member and the plug main body is released, and the handle can be turned from the closed position to the open position.

In order to move the lock member to the lock position, it is necessary to further push the movable member. However, when the lock member reaches the release position, the entire movable member is located inside the stopper. I can't press. Therefore, the movable member is screwed into a screw hole formed on the inner peripheral surface of the mounting hole, a screwdriver or the like is inserted from the outside of the stopper, and the movable member is screwed in, so that the lock member is moved to the lock position. I have. When the lock member reaches the lock position, it engages with the plug body and prevents the handle from turning in the opening direction. Moreover, when the lock member is moved to the lock position, the entire movable member enters and is hidden by the inside of the mounting hole, so that the lock member is not rotatably operated by an outsider. Therefore, the gas stopper can be in a kind of sealed state.

In the above-described gas plug, an engaging portion is provided on the upper end surface of the plug main body, and a relief portion is formed on the lower surface of the lock member facing the upper end surface of the plug main body, so that the lock member is released. When it is located at the position, the engaging portion can enter the escape portion. As a result, the engagement between the lock member and the plug main body is released, and the handle can be turned. Therefore, when the lock member is moved to the release position, it is necessary to always maintain a fixed posture so that the engagement portion can enter the escape portion.
Therefore, the upper end surface of the plug body and the lower surface of the lock member are made flat, and the lock member is maintained in a fixed posture by contacting both surfaces.

[0005]

In the above-mentioned conventional gas stopper, if the lock member is screwed into the mounting hole in order to move the lock member from the release position to the lock position, the movable member is not required. This is unnecessary, and the number of parts can be reduced correspondingly, so that the manufacturing cost of the gas stopper can be reduced. However, as described above, since the lock member is in planar contact with the plug body, the lock member cannot be rotated. Therefore, the movable member cannot be omitted, and the number of parts cannot be reduced. For this reason, the manufacturing cost of the gas stopper could not be reduced.

[0006]

Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 comprises a plug body, a plug housed inside the plug body, and a plug body connected to the plug body. A handle for rotating the stopper between a closed position and an open position; and a lock mechanism provided between the handle and the stopper, wherein the lock mechanism is formed on the handle. A lock member inserted movably between an engagement position, a release position, and a lock position which are sequentially determined from the outer side to the inner side of the mounting hole in the mounting hole; It has an urging means for urging outward and a stopper for preventing the lock member from moving outward from the engagement position, and the lock member partially moves from the mounting hole at the engagement position. An engaging portion formed on the stopper body, Engagement prevents rotation of the handle in the opening direction, and in the release position, allows the handle to rotate by allowing the engagement portion to enter a relief portion formed in the lock member. At the lock position, the entirety enters the inside of the mounting hole, and in the gas stopper which engages with the engaging portion of the plug body and prevents the handle from turning in the opening direction, the lock member is inserted into the mounting hole. The lock member is rotatably inserted, the relief portion is formed in an annular shape on the outer periphery of the lock member, and the lock member is screwed into the lock member with a screw hole formed on the inner peripheral surface of the mounting hole. Is formed to move a screw portion to a lock position. In this case, when the lock member engages with the engagement portion to prevent the handle from rotating in the closing direction, the handle engages with the stopper body and rotates the handle in the opening direction. It is desirable to integrally form a rotation preventing portion for preventing the rotation.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. FIGS. 1 to 13 show an embodiment of the present invention. A gas stopper A shown in these figures includes a stopper body 1, a stopper 2, a handle 3 and a lock mechanism 4.

As shown in FIG. 1 and FIGS. 3 to 5, a plug housing hole 11 is formed inside the plug main body 1 and is opened at the upper end surface thereof. The taper hole portion 11a of the plug accommodation hole 11
, The plug 2 is rotatably accommodated. The plug 2 has a gas hole 21 formed therethrough. When the gas hole 21 is directed in a direction orthogonal to the gas passage 12 formed in the plug main body 1, the gas passage 12 is blocked by the plug 2. As a result, the gas stopper A is closed (the state shown in FIG. 1B), and when the stopper 2 is rotated by 90 ° from this state, one end and the other end of the gas passage 12 are closed by the gas holes 21. And the gas stopper A is opened.

The plug body 1 and the handle 3 are rotatably connected as follows. That is, as shown in FIGS. 1 and 3 to 5, an annular projecting portion 13 is formed on the inner peripheral surface near the upper end opening of the plug housing hole 11. Notches 13a and 13b having different shapes are formed on the annular projecting portion 13 so as to be spaced apart from each other by approximately 180 degrees in the circumferential direction. On the other hand, an engagement plate 5 is fixed to the lower surface of the handle 3 by bolts 6. This engagement plate 5
As shown in FIGS. 6 and 7, is formed in a disk shape, and is formed in such a size that it can pass through the annular projecting portion 13. On the outer periphery of the engagement plate 5, projecting pieces 51a, 51b
Are formed. The protruding pieces 51a and 51b have shapes corresponding to the notches 13a and 13b, respectively, and are formed in sizes that allow the notches 13a and 13b to be inserted respectively. However, the protruding pieces 51a and 51b are
It cannot pass through the annular projection 13. Therefore, after the protrusions 51a, 51b are inserted through the notches 13a, 13b, if the handle 3 is rotated by an appropriate angle, for example, 180 °, the protrusions 61a, 61b engage with the lower surface of the annular protrusion 13. Thus, the handle 3 is rotatably attached to the plug body 1.

The plug 2 and the handle 3 are connected so as to rotate integrally. To explain this point, as shown in FIG. 1, a pair of projections 22 are formed on the upper end surface of the plug 2. Meanwhile, handle 3
As shown in FIGS. 10 and 12, a circular projection 31 is formed on the lower surface of the. This engagement recess 3
2, the projections 22, 22 of the plug 2 are inserted,
The plug 2 and the handle 3 are connected so as to rotate integrally.

As is apparent from FIGS. 1A and 1B, when the grip 3a of the handle 3 is oriented in a direction orthogonal to the gas passage 12, the gas stopper A is closed, and from that state, the handle is closed. When the handle 3 is turned by approximately 90 ° and the grip 3a is directed in the same direction as the gas passage 12, the gas stopper A is opened. The engagement plate 5 is fixed to the lower surface of the projection 31, but the projections 22, 22 of the plug 2 pass through the holes 52, 52 formed in the engagement plate 5 and enter the engagement recess 32. I have. Further, a spring 7 is disposed between the plug 2 and the engagement plate 5, and the spring 7 presses the plug 2 against the inner peripheral surface of the tapered hole 11 a, and
Is pressed against the lower surface of the annular projection 13.

A lock mechanism 4 for restricting rotation of the handle 3 is provided between the plug body 1 and the handle 3. That is, as shown in FIGS. 1 and 3 to 5, an engaging wall portion (engaging portion) 14 extending in the circumferential direction is formed on the upper end surface of the plug main body 1. The engagement wall portion 14 has a length of less than half a circumference. On the other hand, on the lower surface of the handle 3,
As shown in FIGS. 1, 9, 10, and 12, a concave portion 33 extending in the circumferential direction is formed. The engaging wall portion 14 is inserted into the concave portion 33 so as to be relatively rotatable. However, the concave portion 33 is not formed in an annular shape, and a portion between both ends thereof remains as a rotation preventing portion 34. Therefore, when the handle 3 is rotated in one direction, the rotation preventing portion 34
Abuts on one end surface of the engaging wall portion 14 in the circumferential direction, and when the handle 3 is rotated in the other direction, the rotation preventing portion 34 abuts on the other end surface of the engaging wall portion 14, whereby the handle 3 Is limited to a range of approximately 180 °.

A mounting hole 35 extending inward is formed on the outer peripheral surface of the handle 3. As is clear from FIGS. 9 and 10, the lower portion of the mounting hole 35 in the middle portion in the longitudinal direction intersects with the concave portion 33. A coil spring (biasing means) is provided in the mounting hole 35.
41 and a lock pin (lock means) 42 are sequentially inserted. The lock pin 42 is urged outward by the coil spring 41. Further, the lock pin 42 has a recess 33 at an intersection of the mounting hole 35 and the recess 33.
It protrudes into.

As shown in FIG. 13, the lock pin 42 is
An annular escape groove (escape portion) 42a is formed on the outer peripheral surface on the distal end side, and an annular position regulating recess 42b is formed on the intermediate outer peripheral surface. A portion between the groove 42a and the position restricting concave portion 42b is a contact portion 42c. A screw 42 d is formed at the tip of the lock pin 42.
2d can be screwed into a screw hole 35a formed in the inner part of the mounting hole 35.

As shown in FIGS. 1, 2, and 9, a through hole 36 is formed in the handle 3 at a portion located below the mounting hole 35 so as to penetrate the portion. The through hole 36 extends in a direction orthogonal to the mounting hole 35, and a part of an upper portion of an intermediate portion thereof intersects the through hole 36 at a central portion thereof.

A spring pin (stopper) 43 is press-fitted into the through hole 36. This spring pin 4
As is well known, a slit (not shown) extending from one end to the other end is formed on the outer peripheral surface of the cylindrical body so that the diameter can be elastically expanded and contracted. It is press-fitted into the through hole 36. Note that, instead of the spring pin 43, a cylindrical body having no slit may be used. In that case, the cylinder may be press-fitted, or a screw may be formed on the outer peripheral surface of the cylinder to be screwed and fixed to the through hole 36.

A part of the spring pin 43 protrudes into the mounting hole 35 at the intersection of the mounting hole 35 and the through-hole 36, and as shown in FIG. 42b. Therefore, as shown in FIG.
When the lock pin 42 is moved outward by the coil spring 41, the lock pin 42 abuts against the side surface on the tip end side of the position regulating concave portion 42b, thereby preventing the lock pin 42 from moving further outward. The position where the lock pin 43 is prevented from moving by the spring pin 43 (engagement position).
In, the base end protrudes outside from the mounting hole 35, and the screw portion 42d is located on the same circumference as the engaging wall portion 14. Therefore, when the handle 3 is rotated, the screw portion 42d abuts on one end surface of the engagement wall portion 14 or abuts on the other end surface, so that the rotation range of the handle 3 is restricted to a range of approximately 180 °. I have.
In addition, when the screw portion 42d abuts on one end surface of the engagement wall portion 14, the rotation preventing portion 34 is
The handle 3 cannot rotate when the lock pin 42 is positioned at the engagement position.

As shown in FIG. 2B, the lock pin 42 is moved inward against the urging force of the coil spring 41, and the base end surface thereof substantially coincides with the opening edge of the mounting hole 35 (release position). To the engagement wall portion 14
Will be located on the same circumference as. The engagement wall portion 14
It can pass through the escape groove 42a. Therefore, the handle 3 becomes rotatable with respect to the plug body 1. However, also at this time, it is needless to say that the rotation range of the handle 3 is limited to a range of approximately 180 ° by the rotation prevention portion 34.

After the lock pin 42 is further pushed in, the screw portion 42d is screwed into the screw hole portion 35a of the mounting hole 35 until the base end side surface of the position regulating concave portion 42b abuts on the spring pin 43 (lock position). If it is moved, it cannot move further inward. In this locked position, the contact portion 42c is located on the same circumference as the engagement wall portion 14. Therefore, as in the case where the lock pin 42 is located at the engagement position, the handle 3 cannot rotate.

On both sides of the upper end of the plug body 1, there are formed insertion holes 15 penetrating the side.
A sealing wire (not shown) is inserted into the insertion hole 15. The wire inserted through the insertion hole 15 is also inserted into the spring pin 43. Then, by coupling both ends of the wire by caulking or the like, the handle 3 is non-rotatably and irremovably connected to the plug main body 1,
Thereby, the gas stopper A is sealed.

Next, a procedure for assembling the gas stopper A having the above-described structure will be described. In assembling, the coil spring 41 and the lock pin 42 are mounted in the mounting hole 35 of the handle 3 in advance, and the spring pin 43 is press-fitted in the through hole 36.

First, the plug 2 is inserted into the tapered hole 11a of the plug main body 1, and is positioned at the closed position. Then, the spring 7 is placed on the plug 2. Next, the projecting pieces 51a of the engagement plate 5,
The insertion plate 51 is inserted into the notch 13a, 13b of the plug body 1 so as to face each other, and the entire engagement plate 5 is moved to the lower side of the annular projection 13 against the urging force of the spring 7. Thereafter, the engagement plate 5 is rotated by 180 °. At this time, the hole 5 of the engagement plate 5
Since the projections 22, 22 of the plug 2 are inserted through the plugs 2, 52, the plug 2 also rotates 180 ° together with the engagement plate 5 so as to be located at another closed position different from the initial closed position. become.

Next, the plug 2 is inserted into the engagement recess 32 of the handle 3.
Are aligned so that the projections 22, 22 of the projections 22 enter. At this time, the locking portion 34 of the handle 3 is positioned at a position 180 ° circumferentially away from the engaging wall portion 14 of the plug body 1.
While maintaining this state, the projection 31 of the handle 3 is
Hit it. After that, the handle 3 is fixed to the engagement plate 5 with the bolt 6. As a result, the handle 3 is
And is prevented from coming off from the plug body 1 through
It is rotatably connected to the plug main body 1 via the plug 2, whereby the assembly is completed. When the assembly is completed, the gas stopper A is in the closed state and the handle 3
Cannot rotate.

After the gas plug A is assembled, in order to open the gas plug A, the lock pin 42 located at the engagement position is pushed to the release position, and the engagement groove 42a is made the same as the engagement wall portion 14. Position on the circumference. While maintaining this state, the handle 3 is turned by approximately 90 ° in a direction away from the end surface of the engaging wall portion 14 against which the locking portion 34 has hitherto come.
Thereby, the gas stopper A is opened. The lock pin 42 may be released while the handle 3 is rotating. This is because even when the lock pin 42 is released, the side surface on the tip side of the escape groove 42a abuts against the engagement wall portion 14, and the lock pin 42 does not move outward.

When the handle 3 located at the open position is rotated by approximately 90 degrees in either the forward or reverse direction, the handle 3 is opened. When the closed state is reached, the escape wall 42a
Comes out of the lock pin 4 by the coil spring 41.
2 is pushed out to the engagement position. As a result, the screw portion 42d of the lock pin 42 and the rotation preventing portion 34 of the handle 3
And the both end faces of the engaging wall portion 14 are engaged with each other to prevent the handle 3 from rotating.

When the gas stopper A is in the closed state, the lock pin 42 is pushed further beyond the release position, and the screw portion 42d at the tip is screwed into the screw hole 35a. When the lock pin 42 is moved to the lock position, the side surface on the base end side of the engagement groove 42b is
3, the lock pin 42 is tightened and fixed. In this state, the rotation of the handle 3 is restricted by the contact portion 42 c and the locking portion 34 and both end surfaces of the engagement wall portion 14. Further, by tightening and fixing the lock pin 42, the rotation operation becomes difficult, and the lock pin 42 enters the mounting hole 35 and is hidden. Therefore, the operation of the lock pin 42 by an outsider can be prevented, and thus the operation of the handle 3 can be prevented, whereby the seal can be achieved.

In the gas stopper A having the above structure, the escape groove 4
Since the 2a is formed in an annular shape, the engaging wall portion 14 can be passed through the clearance groove 42a regardless of how the lock pin 42 is rotated. Therefore, the lock pin 42 can have a circular cross section, and can be rotatable with respect to the mounting hole 35. Then, by making the lock pin 42 rotatable, the screw portion 42d can be screwed into the screw hole 35a of the mounting hole 35. Therefore, it is not necessary to use a movable member to position the lock pin 42 at the lock position, and the number of parts can be reduced by that amount, thereby reducing the manufacturing cost of the gas plug A.

In the gas stopper A, a recess 33 is formed in the lower surface of the handle 3 so that the engaging wall portion 14 can relatively rotate. The rotation preventing portion 3 is left as a blocking portion 35.
5 against the engaging wall portion 14 so that the handle 3
Is set to the closed position, so that the handle 3
There is no need to separately provide a member or the like that positions the in the closed position.
Therefore, the gas stopper A can be manufactured more inexpensively.

Next, another embodiment of the present invention will be described with reference to FIGS. In the embodiment described below, only portions different from the above-described embodiment will be described, and portions similar to those in the above-described embodiment will be denoted by the same reference numerals and description thereof will be omitted.

The present embodiment is different from the above-described embodiment in that a connecting structure between the plug main body 1 and the handle 3 is different from that of the first embodiment.
The point is that a lock mechanism 4 ′ is used instead of the lock mechanism 4. First, the connection structure between the plug body 1 and the handle 3 will be described. In this embodiment, the engagement plate 5 in the above embodiment is not used, and as shown in FIGS. Projection pieces 31a and 31b corresponding to the projecting pieces 51a and 51b of the engaging plate 5 are directly formed on the outer peripheral surface of the lower end of the projection 31 of the third. The handle 3 is rotatably connected to the plug body 1 by inserting the protruding pieces 31 a and 31 b into the notches 13 a and 13 b and engaging with the lower end surface of the annular protruding part 13. Further, the rotation preventing portion 34 is not formed on the lower surface of the handle 3, and the concave portion 33 is formed in an annular shape. In this embodiment, the engaging recess 32 is formed in an arc shape, but this is due to a difference in processing method.
Functionally, it is the same as the engaging recess of the above-described embodiment in which the depth is constant.

Next, the lock mechanism 4 'will be described.
As shown in FIGS. 14 and 15, a second engagement wall portion 16 is formed on the upper end surface of the plug main body 1. The second engaging wall portion 16 is arranged on the opposite side of the engaging wall portion 14 in the circumferential direction, and is arranged on the same circumference as the engaging wall portion 14. Further, the height is higher than the engaging wall portion 14. The other points are the same as those of the engagement wall portion 14, and this second
Of the handle 3 is also rotatable with respect to the concave portion 33 of the handle 3. A recess 17 is formed between the second engaging wall 16 and the engaging wall 14. The recess 17 has such a size that the lock pin 42 can pass through.

As shown in FIGS. 19 to 22, a stopper tube 44 as a stopper instead of the spring pin 43 is screwed and fixed to the opening of the mounting hole 35. The lock pin 42 is positioned at the engagement position by abutting the stopper cylinder 44. Of course, when the lock pin 42 is located at the engagement position, as shown in FIG. 19, the base end portion of the lock pin 42 penetrates through the stopper tube 44 and protrudes to the outside, and is adjacent to the escape groove 42a on the distal end side. The contact portion 42e enters the concave portion 17 and comes to be located between the engaging wall portion 14 and the second engaging wall portion 16. Then, the rotation of the handle 3 is prevented by the contact portions 42e abutting against the respective end surfaces of the engagement wall portion 14 and the second engagement wall portion 16.

On the outer peripheral surface on the base end side of the lock pin 42, a screw portion 42f is formed instead of the screw portion 42d of the above embodiment. On the other hand, on the inner peripheral surface of the mounting hole 35, a screw hole 35b is formed instead of the screw hole 35a of the above-described embodiment, until the screw 42f abuts on the outer end of the screw hole 35b. When the lock pin 42 is moved inward, the lock pin 42 is located at the release position. When the lock pin 42 moves to the release position, as shown in FIG. 20, the escape groove (escape portion) 42a is
And each end face of the engaging wall portion 16. Here, the depth of the escape groove 42a is set so that the engaging wall portion 14 can pass through, but the second engaging wall portion 16 cannot pass through. Therefore,
Assuming that the handle 3 is located at the closed position, the handle 3 is rotatable toward the open position, but is rotated in the opposite direction by the lock pin 42 abutting against the second engagement wall 16. Movement is prevented. Thus, the closed position of the handle 3 is defined.

Further, by screwing the screw portion 42e into the screw hole portion 15b, the lock pin 42 can be moved to the lock position. As shown in FIG. 21, in the locked position, the contact portion 42 g adjacent to the escape groove 42 a on the base end side enters the concave portion 17 and the engagement wall portion 14 and the second
Between the contact wall 4 and the engaging wall 16.
The rotation of the handle 3 is prevented by the 2 g abutting on each end face of the engaging wall portion 14 and the second engaging wall portion 16. Of course, in the locked position, the entire lock pin 42 enters the mounting hole 35.

A small diameter screw portion 42h is formed at the tip of the lock pin 42, and a small diameter screw hole 35c is formed at the bottom of the mounting hole 35. Small thread 42
When the screw h is screwed into the small diameter screw hole 35c and tightened, the entire lock pin 42 is engaged with the engagement wall 14 and the second engagement wall 1
6 is inserted into the mounting hole 35 inside. Therefore, in this state, the handle 3 can be freely rotated.

When assembling the gas stopper having the above structure,
The small diameter screw portion 42h of the lock pin 42 is
c, and the lock pin 42 is positioned inside the mounting hole 35. Then, after the plug 2 and the handle 3 are connected in the same manner as in the above embodiment, the handle is turned approximately 90 °. Then, the lock pin 42 is
And the small diameter screw portion 42h
When the lock pin 42 is removed from the small diameter screw portion 35 c, the lock pin 42 is moved outward by the urging force of the spring 41. Then, it passes through the concave portion 17 and hits the stopper cylinder 44 to stop. Thereby, the lock pin 42 is positioned at the engagement position shown in FIG. 19, and the handle 3 is stopped at the closed position. The subsequent opening / closing operation of the handle 3 is the same as in the above embodiment. In addition, in the gas stopper of this embodiment, since the lock pin 42 is engaged with the engagement wall portion 14 and the second engagement wall portion 16 to prevent the rotation of the handle 3, the gas stopper of the embodiment described above is used. This eliminates the need for the form of the rotation preventing portion 34. However, on the other hand, the second engagement wall 16 is required.

The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, in the second embodiment, the second engagement wall 1
Although the height of 6 is higher than the engaging wall 14, the height may be the same and the thickness may be thicker than the engaging wall 14. Of course, in such a case, the width of the concave portion 33 is set to a width that allows the second engagement wall portion 16 to enter into a relatively rotatable manner.

[0038]

As described above, according to the first aspect of the present invention, the movable member, which is indispensable in the conventional gas plug, becomes unnecessary, and the number of parts is reduced by that much, and the manufacturing cost of the gas plug is reduced. Can be reduced. Further, according to the second aspect of the present invention, since it is not necessary to particularly form a part or a part for regulating the closed position of the handle, the production cost of the gas stopper can be further reduced. can get.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a gas stopper according to the present invention, wherein FIG. 1 (A) is a cross-sectional view thereof, and FIG.
It is a BB sectional view of (A).

FIG. 2 is an enlarged sectional view showing a main part of the gas stopper shown in FIG. 1, wherein FIG. 2 (A) shows a state in which a handle is located at a closed position, and FIG. FIG. 2C shows a state where the handle is located at the closed position and the lock is moved to the lock position.

FIG. 3 is a plan view showing a plug main body of the gas plug shown in FIG.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a sectional view taken along line YY of FIG. 3;

FIG. 6 is a plan view showing an engagement plate of the gas stopper shown in FIG.

FIG. 7 is a sectional view taken along line XX of FIG. 6;

FIG. 8 is a plan view showing a handle of the gas stopper shown in FIG. 1;

FIG. 9 is a sectional view taken along line XX of FIG. 8;

10 is a view as viewed in the direction of the arrow X in FIG. 9;

FIG. 11 is a view as viewed in the direction of the arrow Y in FIG. 9;

FIG. 12 is a sectional view taken along line YY of FIG. 8;

FIG. 13 is a plan view showing a lock pin of the gas stopper shown in FIG.

FIG. 14 is a plan view showing a plug main body according to another embodiment of the present invention.

FIG. 15 is a sectional view taken along line XX of FIG. 14;

FIG. 16 is a sectional view showing a handle according to another embodiment.

17 is a view as viewed in the direction of the arrow X in FIG. 16;

18 is a sectional view taken along line XX of FIG.

FIG. 19 is a cross-sectional view similar to FIG. 2A, showing a main part of another embodiment.

FIG. 20 is a cross-sectional view similar to FIG. 2B, showing a main part of another embodiment.

FIG. 21 is a cross-sectional view similar to FIG. 2C, showing a main part of another embodiment.

FIG. 22 is a diagram showing a main part of another embodiment,
It is sectional drawing which shows the state which located the lock pin in the mounting hole inside an engagement wall part.

[Explanation of symbols]

 A Gas plug 1 Plug body 2 Plug body 3 Handle 4 Lock mechanism 4 'Lock mechanism 14 Engagement wall (engagement part) 35 Mounting hole 35a Screw hole 35b Screw hole 41 Coil spring (biasing means) 42 Lock pin (Lock member) 42a Escape groove (escape part) 42d Thread part 42f Thread part 43 Spring pin (stopper) 44 Stopper cylinder (stopper)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hitoshi Denda 4-20-14 Toyocho, Shinagawa-ku, Tokyo Koyo Sangyo Co., Ltd. (72) Inventor Yasushi Yasushi 4-20-14 Toyocho, Shinagawa-ku, Tokyo Gwangyo Sangyo (72) Inventor Kazuma Takahashi 4-20-14 Toyocho, Shinagawa-ku, Tokyo Koyo Sangyo Co., Ltd. (56) References JP-A-6-265047 (JP, A) JP, U) Jikken 61-23989 (JP, Y2) Jikgyo 3-31899 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 35/00-35/16 F16K 31/60 F16K 5/00

Claims (2)

(57) [Claims] 1. A stopper body, a stopper housed inside the stopper body, a handle connected to the stopper body for rotating the stopper between a closed position and an open position, A lock mechanism provided between the handle and the plug, wherein the lock mechanism is provided in a mounting hole formed in the handle in order from an outer side to an inner side of the mounting hole. A lock member movably inserted between the engagement position, the release position and the lock position, a biasing means for biasing the lock member to the outside of the mounting hole, and the lock member moving outward from the engagement position. Having a stopper for preventing movement,
At the engagement position, the lock member partially protrudes from the mounting hole, and engages with an engagement portion formed on the plug body to prevent the handle from turning in the opening direction,
In the release position, the handle is allowed to rotate by allowing the engagement portion to enter into the escape portion formed in the lock member. In the lock position, the handle entirely enters the inside of the mounting hole and the plug body In the gas stopper that engages with the engaging portion and prevents the handle from turning in the opening direction, the lock member is rotatably inserted into the mounting hole, and the relief portion is provided on the outer periphery of the lock member. A gas formed in an annular shape, wherein the locking member is formed with a screw portion for moving the locking member to a locking position by screwing into a screw hole formed in an inner peripheral surface of the mounting hole. plug. 2. The handle according to claim 1, wherein the lock member engages with the engagement portion to prevent the handle from rotating in the closing direction.
2. The gas stopper according to claim 1, wherein a rotation preventing portion which engages with the stopper main body to prevent the handle from rotating in the opening direction is formed integrally.