JP2007292260A - Gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cock with handle in which annular concave is processed in outer fitting into annular convex of upper end of cock body, insertion hole communicating to the annular concave is formed in state of side opening, and locking state preventing the handle from rotating and lock releasing state can be set by moving forward/backward locking member housed inside the handle with energizing means, which prevents the locking member from being broken, and decreases the number of part. <P>SOLUTION: In the cock, engagement groove is formed by cutting a part of opening end of annular convex 15, in locking member 4 a large diameter shaft 41 and a small diameter shaft 42 are formed on a same axis, first and second planes 41a, 42a are formed by cutting in parallel to axis a part of periphery of the large diameter shaft 41 and periphery of the small diameter shaft 42, in the handle 3 it is locked not to be rotated when the first plane 41a corresponds to the engagement groove, and the locking state is released when the second plane 42a corresponds to the annular convex 15. Furthermore, a sealing state of the cock impossible to be processed in lock releasing is obtained when the locking member is rotated by 180° in state in which the second plane 42a is corresponded to the engagement groove. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas stopper of a type in which a gas passage is opened and closed by rotating a thread with an operation handle.

FIG. 14 is a cross-sectional view showing a conventional example of this kind of gas plug, and FIGS. 15A and 15B show the state in which the lock member (4) of the gas plug shown in FIG. It is a principal part expanded sectional view.
In this case, the thread (2) accommodated in the plug body (11) can be rotated between the closed position and the open position by the operation handle (3).

  On the back side of the operation handle (3), an annular groove (30) is formed that can be rotatably fitted on the cylindrical part (14) at the upper end of the plug body (11), and is open to one side. Thus, the insertion hole (12) is formed toward the rotation center of the operation handle (3). A part of the back side of the insertion hole (12) is open to the annular groove (30), and the lock member (1) is biased to the insertion hole (12) by the coil spring (18) in the protruding direction. It is housed in the state.

  A male screw part (19) is engraved on the outer periphery of the distal end of the locking member (1) in the pushing direction, and a male screw part (19) is screwed into the inner end of the insertion hole (12). A female screw portion (16) is engraved. A first small-diameter shaft portion (10a) having a smaller diameter than the male screw portion (19) is provided coaxially at a portion following the male screw portion (19) of the lock member (1), and the first small-diameter shaft portion. At a position further coaxially displaced from (10a) to the outer end side of the locking member (1), a large-diameter portion (13) having a diameter substantially matching the inner diameter of the insertion hole (12) is provided, and On the outside thereof, a second small-diameter shaft portion (10b) for restricting the axial movement range of the lock member (1) is provided. A head portion (17) is provided at the further outer end of the second small diameter shaft portion (10b), and the outer end surface of the head portion (17) is engaged with the tip of the driver. A tool engagement groove (17a) is formed.

  Below the insertion hole (12), a through hole (25) passes through the operation handle (3) in a direction perpendicular to the insertion hole (12), and in the central portion thereof, the insertion hole (12) A stopper pin (24) is inserted into the through hole (25) so that a part of the outer peripheral surface projects from the communication part into the insertion hole (12).

  Further, of the upper end of the cylindrical portion (14), the gas passage (not shown) penetrating through the plug body (11) protrudes further upward in a half-circumferential region on the gas inlet side or gas outlet side. A semicircular engagement wall portion (14a) is projected.

FIG. 14 shows a state in which the male thread portion (19) at the tip of the lock member (1) is positioned on the same circumference as the engagement wall portion (14a), and the operation handle (3) has a cylindrical portion ( 14), the non-formation region side of the engaging wall portion (14a) can be rotated by about 180 degrees, and when the male screw portion (19) comes into contact with the end portion of the engaging wall portion (14a). Rotation of the operation handle (3) is prevented. This state is a closed state of the gas stopper.
The lock member (1) is urged outward by the coil spring (18), but is held in a retaining state by engaging the large diameter portion (13) with the stopper pin (24). .

  In FIG. 15A, the locking member (1) is pushed inward of the insertion hole (12) against the biasing force of the coil spring (18) from the state of FIG. ) And the large-diameter portion (13), the engagement wall portion (14a) is positioned on the first small-diameter shaft portion (10a), and the engagement between the male screw portion (19) and the engagement wall portion (14a) is established. This shows a state where the connection is released. Thereby, the rotation prevention state of the operation handle (3) is released, and the operation handle (3) can be rotated.

From the state shown in FIG. 14, the lock member (1) is pushed in, and a screwdriver is engaged with the tool engagement groove (17a) of the head (17) of the lock member (1) so that the lock member (1) When the male screw portion (19) is screwed into the female screw portion (16) at the back of the insertion hole (12), the large diameter portion (13) of the locking member (1) is engaged as shown in FIG. It will be located on the same circumference as the joint wall portion (14a), and the operation handle (3) is restricted from turning as in the case of FIG. In this state, the lock member (1) is housed in a position recessed from the open end of the insertion hole (12), and the lock member (1) cannot be pulled out without a screwdriver. Is maintained in a state where the rotation is restricted. Further, a sealing wire (not shown) is inserted into the insertion hole (26) and stopper pin (24) formed in the plug body (11), and both ends thereof are twisted and connected to each other. The operation handle (3) can be non-rotatably sealed with respect to the plug body (11), and the gas plug can be locked in the closed state between the gas piping work and the occupancy of the newly built house.
Japanese Patent Laid-Open No. 10-19161 Japanese Utility Model Publication No. 60-11337

However, in the conventional gas stopper described above, the male screw part (19) of the lock member (1) is brought into contact with the engaging wall part (14a) in order to restrict the rotation of the operation handle (3). Therefore, there is a possibility that the male screw portion (19) may be damaged by repeatedly hitting the male screw portion (19) against the engaging wall portion (14a). If the male screw part (19) is damaged, the female screw part (16) cannot be screwed well, and the lock member cannot be maintained in the sealed state as shown in FIG.
In addition, a stopper pin (24) is additionally required to hold the lock member (1) biased outward by the coil spring (18) in a retaining state.

The present invention has been made in view of such a point, and `` a plug body having a configuration in which a cylindrical portion is continuously connected to an open end of a spiral accommodating portion that accommodates a spiral that opens and closes a gas flow path;
An annular groove is rotatably fitted to an annular convex portion formed at the open end of the cylindrical portion, and the spiral in the spiral accommodating portion is rotated between a closed position and an open position. An operation handle;
An insertion hole which is opened toward one side of the operation handle and is drilled toward the rotation center of the operation handle so as to communicate with the bottom of the annular groove,
A lock position that is rotatably inserted into the insertion hole and is urged to the open end side of the insertion hole by the urging means, and allows the operation handle to rotate. In the gas stopper comprising a lock member set to be movable back and forth in the axial direction between the lock release position and the lock release position, the lock member is prevented from being damaged and the number of parts can be reduced. Let it be an issue.

[Invention of Claim 1]
The solving means of the present invention taken to solve the above-mentioned problem is: `` A part of the open end of the annular convex part (15) is cut out to form an engaging groove (151),
The locking member (4) has a large-diameter portion (41) at the tip, a small-diameter shaft portion (42) that follows it, and has the same diameter as that of the large-diameter portion (41) and a tool engagement with the outer end surface. A large-diameter shaft portion (43) in which the groove (44) is formed is a metal round shaft coaxially positioned,
A portion of the outer peripheral surface of the large-diameter portion (41) on the small-diameter shaft portion (42) side is cut out in parallel to the axis to form a first flat surface portion (41a),
Of the outer peripheral surface of the small-diameter shaft portion (42), on the side where the first flat surface portion (41a) is formed, parallel to the first flat surface portion (41a) and from the first flat surface portion (41a). Is formed a second flat portion (42a) located one step deeper,
The lock member (4) is inserted into the insertion hole (33) against the urging force of the urging means, and the second flat portion (42a) is substantially the same as the bottom of the annular groove (30). The annular groove (30) can be rotatably fitted to the annular convex portion (15) in a state of facing the surface,
The lock member (4) has a first step portion (45) between the second flat surface portion (42a) and the first flat surface portion (41a) by the urging force of the urging means. A first engaging position engaging with the inner side of (15) and a second step portion (46) between the first flat surface portion (41a) and the outer peripheral surface of the large-diameter portion (41). While moving forward and backward between the second engagement position engaged from the inside to the open end of the groove (151),
After the lock member (4) is pushed into the first engagement position in a state corresponding to the engagement groove (151), the small-diameter shaft portion is rotated at a third engagement position rotated 180 degrees. The third step portion (47) between the outer peripheral surface of (42) and the large diameter portion (41) is set to engage with the open end of the engagement groove (151) from the inside ” That is.
The technical means operates as follows.
When the lock member (4) is inserted to the final insertion position, the second flat surface portion (42a) of the small diameter shaft portion (42) is substantially the same as the bottom portion (30a) of the annular groove (30) of the operation handle (3). In this state, the annular groove (30) is externally fitted to the annular protrusion (15) at the upper end of the tubular portion (14) of the plug body (11). Then, the locking member (4) is positioned by the urging means at the first engagement position where the first step portion (45) is engaged with the annular convex portion (15) from the inside. The member (4) is housed in the insertion hole (33) in a retaining state, and the operation handle (3) is rotatable on the annular convex portion (15).

  When the locking member (4) reaches the engagement groove (151) in the annular protrusion (15), the engagement between the first step (45) and the annular protrusion (15) is released, The locking member (4) is moved in a direction protruding from the insertion hole (33) by the urging force of the urging means, and the second step portion (46) is inwardly connected to the open end of the engaging groove (151). It will be located in the 2nd engagement position engaged from. In the second engagement position, the first flat surface portion (41a) formed in the large diameter portion (41) corresponds to the engagement groove (151). From this state, the operation handle is rotated clockwise or counterclockwise. Even if it is intended to rotate clockwise, the outer peripheral surface of the large-diameter portion (41) following the first flat surface portion (41a) hits both ends of the engagement groove (151), and the operation handle (3) Rotation is prevented. That is, the second engagement position is a lock position.

  From this state, when the lock member (4) is pushed in and moved to the first engagement position, the large-diameter portion (41) moves inward from the annular convex portion (15), and the engagement groove (151) is disengaged from the outer peripheral surface of the large-diameter portion (41), and the operation handle (3) becomes rotatable. That is, the first engagement position is a lock release position.

  Then, with the lock member (4) positioned at the second engagement position, the tool is made to correspond to the tool engagement groove (44) on the outer surface of the large diameter shaft portion (43), so that the first engagement is achieved. After pushing into the alignment position, it is rotated 180 degrees in the insertion hole (33). Then, the third step portion (47) located on the opposite side of the first step portion (45) engages with the open end of the engagement groove (151), and the engagement groove (151) has a small diameter shaft portion. (42) corresponds, and the outer peripheral surface of the small-diameter shaft portion (42) is positioned at both ends of the engagement groove (151), and the rotation of the operation handle is prevented. From this state, even if the lock member (4) is pushed in, the large diameter shaft portion (43) abuts against the open end of the engagement groove (151) and only further pushing is prevented, and the small diameter shaft portion ( 42) The engagement of the engagement groove (151) at both ends cannot be released. This state is a sealed state of the gas stopper, and the lock member (4) is located at the third engagement position. In order to release the sealed state, the lock member (4) must be rotated 180 degrees within the insertion hole (33) using a tool again.

[Invention of Claim 2]
The gas plug of the invention according to claim 2 is a gas plug similar to the gas plug described in the above problem, and solves the same problem as the above problem, and technical means taken for that purpose are as follows. An engagement groove (151) is formed by cutting out a part of the open end of the part (15),
The lock member (5) includes a first large diameter portion (51), a second large diameter portion (52) having a smaller diameter than the first large diameter portion (51), and a smaller diameter than the second large diameter portion (52). A first small-diameter shaft portion (50), a third large-diameter portion (53) having the same diameter as the first large-diameter portion (51), and a second small-diameter shaft portion having the same diameter as the second large-diameter portion (52) ( 55) and the fourth large diameter portion (54) having the same diameter as the first and third large diameter portions (51) and (53) and having a tool engagement groove (56) formed on the outer end surface thereof are coaxial. With metal round shafts located in order,
A part of the outer peripheral surface of the third large-diameter portion (53) is cut away in parallel with the axis to form a flat portion (57) continuous on the same line as the outer peripheral surface of the second small-diameter shaft portion (55). ,
The lock member (5) is inserted into the insertion hole (33) against the urging force of the urging means, and the first small diameter shaft portion (50) is made to correspond to the annular groove (30). The annular concave groove (30) can be rotatably fitted to the annular convex portion (15),
The lock member (5) includes a first engagement position where the second large diameter portion (52) engages the annular convex portion (15) from the inside by an urging force of the urging means; The one large diameter portion (51) is set to be movable forward and backward between a second engagement position engaged with the open end of the engagement groove (151) from the inside,
In a state where the lock member (5) in the second engagement position is inserted until the second small diameter shaft portion (55) corresponds to the annular groove (151), the lock member (5) is 180 The step portion (58) between the outer peripheral surface of the third large-diameter portion (53) and the second small-diameter shaft portion (55) is in the engagement groove (151). ) To be engaged from the inside to the open end.
The technical means operates as follows.
In the state where the lock member (5) is inserted into the insertion hole (33) until the first small diameter shaft portion (50) corresponds to the annular groove (30) of the operation handle (3), the annular groove (30 ) Is fitted on the annular projection (15) of the plug body (11). Then, the lock member (5) is positioned at the first engagement position where the second large diameter portion (52) is engaged with the annular convex portion (15) from the inside by the urging means. The member (5) is housed in the insertion hole (33) so as not to be detached, and the operation handle (3) is rotatable.

  When the lock handle (5) reaches the engagement groove (151) of the annular protrusion (15) by the rotation of the operation handle (3), the second large diameter part (52) and the annular protrusion (15) is disengaged, and the lock member (5) is moved in a direction protruding from the insertion hole (33) by the biasing force of the biasing means, and the first large diameter portion (51) is engaged. It will be located in the 2nd engagement position engaged with the open end of a joint groove (151) from the inside. In the second engagement position, the second large diameter portion (52) corresponds to the engagement groove (151). From this state, the second large diameter portion (52) can be rotated even if the operation handle is rotated. The outer peripheral surface of the portion (52) comes into contact with both ends of the engagement groove (151), and the operation handle (3) cannot be rotated. That is, the second engagement position is a lock position of the lock member (5).

  From this state, when the lock member (5) is pushed in and moved to the aforementioned first engagement position, the second large diameter portion (52) moves inward from the annular convex portion (15) and engages. Since the engagement of the groove (151) with the outer peripheral surface of the second large diameter portion (52) is released, the operation handle (3) can be rotated. That is, the first engagement position is a lock release position.

  Then, from the state where the lock member (5) is positioned at the second engagement position, the insertion hole (until the fourth large diameter portion (54) contacts the open end of the engagement groove (151) from the outside). 33), push the tool into the tool engagement groove (56) on the outer surface of the fourth large diameter shaft portion (54) with the second small diameter shaft portion (55) corresponding to the engagement groove (151). The lock member (5) is rotated by 180 degrees corresponding to the above. Then, the step portion (58) between the third large diameter portion (53) and the second small diameter shaft portion (55) is engaged with the open end of the engagement groove (151) from the inside, and the engagement groove Since the second small diameter shaft portion (55) corresponds to (151), the outer peripheral surface of the second small diameter shaft portion (55) comes into contact with both ends of the engagement groove (151), and the operation handle (3) Is prevented from rotating. From this state, even if the lock member (5) is pushed in, the fourth large diameter portion (54) comes into contact with the open end of the engagement groove (151), and further push-in is prevented. Therefore, the rotation prevention state of the operation handle (3) cannot be released. This state is the sealing state of the gas stopper, and the lock member (5) is in the third engagement position. To release this sealed state, the lock member (5) must be rotated 180 degrees again using a tool.

  The gas plug according to a third aspect of the present invention is the gas plug according to the first or second aspect, wherein the engagement groove is on an axis of the annular convex portion that is orthogonal to the gas flow path. The lock member corresponds to the engagement groove when the lock member accommodated in the insertion hole of the operation handle is aligned with the position perpendicular to the gas flow path. Thus, the lock member is positioned at the lock position, and the rotation of the operation handle is prevented. Therefore, if the state in which the lock member is in the locked position is set to the closed state of the thread, it can be seen at a glance whether the thread is in the open state or the closed state.

Since the present invention has the above configuration, the present invention has the following specific effects.
According to the first aspect of the present invention, since the male thread portion is not provided on the lock member, the lock member is not damaged even if the operation handle is forcibly rotated while the lock member is in the lock position. . Therefore, the open / close state and the sealed state of the thread can be reliably maintained. Further, since the lock member itself also functions as a means for preventing the lock member from being detached, a separate part is not required as the means for preventing the lock member from being removed, the number of parts can be reduced, and assembly is facilitated.

  In the invention of claim 2, the same effect as the above effect occurs, and the lock member in the sealed state can be positioned deep in the insertion hole. improves. In addition, the lock member is protected from external impact, rain, and the like.

  In the invention of claim 3, since the opening and closing of the thread can be visually confirmed, a user-friendly gas stopper can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The gas stopper according to the embodiment of the present invention is implemented as a so-called meter gas stopper used in a gas meter.
[About the first embodiment]
FIG. 1 is an exploded sectional view of the gas stopper according to the first embodiment of the present invention, and shows a straight gas connecting the gas inlet (11a) and the gas outlet (11b) of the stopper main body (11). In the center of the passage (100), a thread accommodating portion (20) that opens upward is formed, and in the thread accommodating portion (20), a truncated cone-shaped thread that can be rotated by an operation handle (3). (2) is inserted.

A cylindrical portion (14) is continuously provided at the open end of the thread accommodating portion (20), and a thin annular convex portion (15) is protruded from the open end. Locking grooves (151) and (151) are cut out at each position of the open end of the annular protrusion (15) perpendicular to the gas passage (100).
As shown in the figure, the passage hole (21) formed in the thread (2) is in the state where the thread (2) is in the open position when it matches the gas passage (100) of the plug body (11). The state rotated 90 degrees from now on becomes the closed position of the spiral (2). An operation piece (22) is projected at each symmetrical position from the center of the top surface of the screw (2), and a groove (opened downward) is formed in the center tube (31) on the back surface of the operation handle (3) ( 35), the screw (2) can be rotated together with the operation handle (3) by fitting the operation piece (22) into the operation piece (22). It can be rotated between an open position and a closed position.

  In addition, although not shown in the drawing, the operation cylinder (31) has a plurality of protruding pieces protruding outward at a predetermined interval, and this is from the cylinder part (14) of the plug body (11). By engaging the arcuate part (141) projecting inward from the lower side in the drawing, the operation handle (3) is rotatable with respect to the plug body (11). And it will be attached in the retaining state.

  An insertion hole (33) that opens to the one side and reaches the center tube (31) is formed at the proximal end portion of the handle portion (32) protruding in one direction of the operation handle (3). The insertion hole (33) communicates with the bottom (30a) of the annular groove (30) at a location intersecting the annular groove (30).

In the insertion hole (33), the lock member (4) is accommodated in a state of being biased in a direction protruding from the insertion hole (33) by the biasing force of the coil spring (18).
The locking member (4) has a large-diameter portion (41) having a diameter that can be accommodated in the insertion hole (33) so as to be able to move forward and backward, and a small-diameter shaft portion that is smaller than the large-diameter portion (41). 42), and a large-diameter shaft portion (43) having the same diameter as that of the large-diameter portion (41), which is a metal round shaft coaxially positioned outside the large-diameter shaft portion (43). On the top surface, a tool engagement groove (44) for making a tool such as a screwdriver correspond is formed.
A part of the outer peripheral surface of the large-diameter portion (41) is cut away in parallel to the axis so as to open from the substantially central region of the axial length to the small-diameter shaft portion (42) side, and the first plane portion ( 41a) is formed.

  Further, the first flat surface portion (41a) is cut out in parallel with the first flat surface portion (41a) from the outer peripheral surface of the small diameter shaft portion (42) where the first flat surface portion (41a) is formed. A second flat surface portion (42a) located one step deeper than that is formed.

To complete the gas stopper by combining the parts in the disassembled state shown in FIG. 1, first, the lock member (4) is pushed into the insertion hole (33) against the urging force of the coil spring (18), and the operation is performed. The second flat surface portion (42a) of the small diameter shaft portion (42) of the lock member (4) is exposed from the bottom surface (30a) of the annular groove (30) of the handle (3). At this time, the mutual dimensional relationship is set so that the second plane portion (42a) forms the same plane as the bottom surface (30a). In this state, as shown in FIG. ) Can be fitted to the annular convex portion (15) at the upper end of the cylindrical portion (14) of the plug body (11).
In the state where the annular groove (30) of the operation handle (3) is externally fitted to the annular protrusion (15) of the plug body (11), the annular protrusion (15) is formed into the annular groove (30). Is set so as to protrude into the insertion hole (33).

In order to attach the operation handle (3) to the plug body (11), the protruding piece projecting outward from the central tube (31) of the operation handle (3) is attached to the plug body (11). It pushes in the downward direction from the non-formation area | region of the circular-arc-shaped part (141) protruding inwardly by the cylinder part (14). In this state, the operation handle (3) is pushed upward by the biasing force of the spring (23) interposed between the inside of the center tube (31) of the operation handle (3) and the top surface of the thread (2). The operation handle (3) is rotated by a predetermined angle in a state in which the protruding piece is pushed below the arcuate part (141) because it comes off the plug body (11), and the operation handle (3) protrudes. The piece is engaged with the arcuate part (141) of the plug body (11) from below. As a result, the operation handle (3) is attached to the stopper main body (11) so as to be prevented from being detached and to be rotatable. This is the state of FIG. 2, where the handle portion (32) of the operation handle (3) is positioned parallel to the gas passage (100), and the passage (21) is connected to the gas passage (100). It is located in the matching open position.
Note that the locking groove (151) of the annular convex portion (15) is not shown in FIG. 2 because it is formed at a position orthogonal to the gas passage (100).

  In this state, since the lock member (4) is urged toward the open end side of the insertion hole (33) by the urging force of the coil spring (18), the second plane portion (42a) and the first plane portion The first step portion (45) between (41a) and the annular convex portion (15) is engaged from the inside. This is a state in which the lock member (4) is in the first engagement position.

In the first engagement position, the small diameter shaft portion (42) of the lock member (4) is positioned above the annular convex portion (15) of the plug body (11), and the operation handle (3) is rotated. Since there are no obstacles, the operation handle (3) can be turned clockwise and counterclockwise.
When the operation handle (3) is rotated 90 degrees clockwise or counterclockwise as described above, the lock member (4) corresponds to the locking groove (151) of the annular protrusion (15). Become.

  Then, the engagement of the first step portion (45) with the annular convex portion (15) is released, and the lock member (4) is moved in the protruding direction by the biasing force of the coil spring (18), as shown in FIG. Thus, the second step portion (46) between the first flat surface portion (41a) and the outer peripheral surface of the large diameter portion (41) is engaged with the open end of the locking groove (151) from the inside. Become. This is the state in which the lock member (4) is in the second engagement position, the handle portion (32) of the operation handle (3) is positioned at a right angle to the gas passage (100), and the screw (2) is in the closed position. It is in.

  In the second engagement position, the first flat surface portion (41a) of the large diameter portion (41) corresponds to the locking groove (151) of the annular convex portion (15). In this state, the operation handle ( Even if 3) is to be rotated, as shown in FIG. 4, the outer peripheral surface of the large-diameter portion (41) comes into contact with both ends (152) of the locking groove (151). (3) cannot be rotated. In this way, the operation handle (3) is rotated 90 degrees from the first engagement position of the lock member (4) shown in FIG. 2, and the lock member (4) is moved to the second position as shown in FIG. When advanced to the engagement position, the operation handle (3) is locked in a non-rotatable state and the thread (2) is maintained in the closed position.

  When the locking member (4) in the second engagement position is pushed in as it is and is positioned in the first engagement position, the locking member (4) on both ends of the locking groove (151) on the outer peripheral surface of the large diameter portion (41) is placed. Disengagement. This is a state in which the lock state of the operation handle (3) is released, and the operation handle (3) can be rotated.

  Further, the lock member (4) is pushed into the first engagement position with the lock groove (151) corresponding to the lock groove (151), and a tool such as a screwdriver is inserted into the tool engagement groove (44) of the lock member (4). Correspondingly, the lock member (4) is rotated 180 degrees within the insertion hole (33). Then, as shown in FIGS. 5 and 6, the first flat portion (41a) and the first portion between the outer peripheral surface of the large-diameter portion (41) and the small-diameter shaft portion (42) located on the opposite side of the center. The three-stage portion (47) is engaged with the open end of the locking groove (151) from the inside. This position is a state in which the lock member (4) is positioned at the third engagement position, and even if the operation handle (3) is to be rotated, the outer peripheral surface of the small diameter shaft portion (42) The operation handle (3) is locked in a non-rotatable manner in the same manner as when the lock member (4) is positioned at the second engagement position. The thread (2) maintains the closed position.

When the lock member (4) is pushed in at the third engagement position, the large-diameter shaft portion (43) comes into contact with the open end of the locking groove (151), and the lock member (4) is further pushed back. Can't push into This is the difference from the second engagement position, and the lock member (4) in the third engagement position maintains the state shown in FIG. 5 unless it is rotated 180 degrees again using a tool. Become. This is the sealed state of the gas stopper, and the thread (2) is maintained in the closed position.
In the third engagement position, in the vicinity of the opening of the insertion hole (33) of the operation handle (3), a through hole (34) penetrated in a direction perpendicular to the axis of the insertion hole (33), and a lock member ( If a wire (not shown) or the like is inserted into the through-hole (48) provided in 4) and fixed, there is no inconvenience that the lock member (4) in the sealed state can be rotated by mischief, etc. The sealed state can be maintained.

  In this embodiment, a pin or a screw member that regulates the rotation range of the handle (3) is provided at a predetermined position in the cylindrical portion (14) of the plug body (11), and a hole that penetrates the handle (3). The rotation range of the protruding piece protruded from the operation cylinder (31) of the handle (3) is regulated by the mounting position of the pin or screw member, and the rotation range of the handle (3) is set. . Further, the handle (3) cannot be detached from the plug body (11) within the rotation range of the handle (3).

[Second Embodiment]
7 to 10 show the gas stopper according to the second embodiment and show a modification of the lock member.
The structure of the plug body (11) and the operation handle (3) can be the same as that of the gas plug of the first embodiment described above, and the cylindrical portion (14) of the plug body (11). A locking groove (151) is cut out at each position of the annular projection (15) provided in the cross section perpendicular to the gas passage (100).

  The lock member (5) employed in the second embodiment includes a first large diameter portion (51) at the tip having a diameter that can be accommodated in the insertion hole (33), and the first large diameter portion ( 51) a second large diameter portion (52) having a smaller diameter, a first small diameter shaft portion (50) having a smaller diameter than the second large diameter portion (52), and a third large diameter having the same diameter as the first large diameter portion (51). A diameter portion (53), a second small diameter shaft portion (55) having the same diameter as the second large diameter portion (52), and the same diameter as the first large diameter portion (51) and the third large diameter portion (53) And the 4th large diameter part (54) in which the tool engagement groove | channel (56) for making a tool, such as a driver respond | correspond, was formed in the outer end surface is a metal round shaft located in order coaxially.

A part of the outer peripheral surface of the third large-diameter portion (53) is cut out in parallel with the axis to form a flat portion (57) located on the same line as the outer peripheral surface of the second small-diameter shaft portion (55). ing.
In order to complete the gas stopper of this embodiment, as shown in FIG. 7, the lock member (5) is pushed into the insertion hole (33) against the urging force of the coil spring (18), and the operation handle (3 The first small-diameter shaft portion (50) is positioned at a position corresponding to the bottom surface (30a) of the annular groove (30) of the annular groove (30), and in this state, the annular groove (30) of the operation handle (3) is inserted into the plug body. A projecting piece (not shown) projecting from the central cylinder (31) of the operation handle (3) is arcuately fitted to the annular convex part (15) at the upper end of the cylinder part (14) of (11) The operation handle (3) is rotated by a predetermined angle so as to engage the part (141) from below. This is a state in which the operation handle (3) is attached to the stopper main body (11) in a state where it is prevented from coming off and is rotatable, and the thread (2) is in the open position.

In this state, the lock member (5) is urged toward the open end side of the insertion hole (33) by the urging force of the coil spring (18), and protrudes from the annular groove (30) into the insertion hole (33). The second large-diameter portion (52) is located at the first engagement position where the second large-diameter portion (52) is engaged from the inside at the tip of the annular convex portion (15). In the first engagement position, the operation handle (3) is rotatable.
The engaging groove (151) of the annular convex portion (15) is engaged with the second large diameter portion (52) when the thread (2) of the annular convex portion (15) is in the open state. 7 is formed at a position moved in the clockwise and counterclockwise directions by 90 degrees in the circumferential direction. From the state of FIG. 7, the operation handle (3) is rotated by 90 degrees to release the lock member (5). If it corresponds to the locking groove (151) of the annular convex part (15), the engagement of the second large diameter part (52) with the annular convex part (15) is released as shown in FIG. The locking member (5) is advanced in the protruding direction by the urging force of 18), and the first large diameter portion (51) is engaged with the open end of the locking groove (151) from the inside. This is a state in which the lock member (5) is in the second engagement position, and the thread (2) is rotated to the closed position.

  In the second engagement position, the locking groove (151) of the annular convex portion (15) corresponds to the second large diameter portion (52) of the lock member (5). Even if it is going to rotate 3), the outer peripheral surface of the second large-diameter portion (52) will come into contact with both ends of the locking groove (151), and the operation handle (3) will be rotated further. I can't. Thus, the operating handle (3) is rotated 90 degrees from the first engagement position of the open lock member (5) shown in FIG. 7, and the lock member (5) is closed as shown in FIG. When it is advanced to the second engagement position, the operation handle (3) is locked in a non-rotatable state, and the thread (2) is maintained in the closed position.

  Therefore, when the lock member (4) in the second engagement position shown in FIG. 8 is pushed in as it is and returned to the first engagement position shown in FIG. 7, it engages with the outer peripheral surface of the large-diameter portion (41). The engagement with the stop groove (151) is released, the locked state of the operation handle (3) is released, and the operation handle (3) becomes rotatable.

  Then, from the state shown in FIG. 8, the lock member (5) is inserted into the insertion hole (33) until the fourth large diameter portion (54) comes into contact with the open end of the locking groove (151) from the outside. When pushed in, as shown in FIG. 9, the second small-diameter shaft portion (55) passes through the flat portion (57) of the third large-diameter portion (53) and corresponds to the locking groove (151). . While maintaining this position, a tool such as a screwdriver is made to correspond to the tool engagement groove (56) of the lock member (5), and the lock member (5) is rotated 180 degrees in the insertion hole (33). Then, as shown in FIG. 10, the stepped portion (58) between the outer peripheral surface of the third large-diameter portion (53) and the second small-diameter shaft portion (55) located on the opposite side of the flat portion (57) is formed. Due to the biasing force of the coil spring (18), the engaging groove (151) is engaged with the open end from the inside. This position is the third engagement position of the lock member (5), the operation handle (3) is locked in a non-rotatable state, and the screw (2) maintains the closed position.

  This third engagement position indicates the sealed state of the gas stopper, and the lock member (5) can be moved forward and backward by the length of the second small diameter shaft portion (55), and a tool must be used. For example, it cannot be rotated 180 degrees.

In the case of the second embodiment, the lock member (5) when the gas stopper is in the sealed state is located behind the open end of the insertion hole (33). Rotation can be further prevented, and the safety is further improved.
The control of the rotation range of the handle (3) and the retaining structure are the same as those in the first embodiment.

[About the third embodiment]
FIG. 11 to FIG. 13 show the gas stopper of the third embodiment, and shows a modification of the lock member (5) implemented in the gas stopper of the second embodiment.
In this structure, a part of the third large diameter part (53) and a part of the second small diameter shaft part (55) of the lock member (5) employed in the second embodiment are used as the first small diameter shaft. Cut parallel to the axis so as to be on the same line as the outer peripheral surface of the part (50), so that the flat part (57) extends from the third large diameter part (53) to the second small diameter shaft part (55). Is formed.

  FIG. 11 shows the first engagement position of the lock member (5) in which the thread (2) is in the open position, and the first small diameter shaft portion (50) is positioned above the annular convex portion (15). Thus, the operation handle (3) is rotatable.

  In FIG. 12, the operation handle (3) is rotated 90 degrees from the state of FIG. 11, the thread (2) is in the closed position, and the second large diameter portion (52) is in the engagement groove (151). By fitting, the operation handle (3) shows a second engagement position where the operation handle (3) is maintained in a locked state so as not to rotate.

  Then, from the state shown in FIG. 12, the lock member (5) is pushed into the insertion hole (33) and the second small diameter shaft portion (55) is made to correspond to the locking groove (151). The lock member (5) is rotated by 180 degrees with a tool such as a screwdriver corresponding to the mating groove (56). Then, as shown in FIG. 13, the non-cut portion of the third large-diameter portion (53) is engaged with the open end of the locking groove (151) from the inside by the biasing force of the coil spring (18), and the lock member This is the third engagement position indicating the sealed state (5).

  In the lock member (5) of this embodiment, the third large diameter portion (53) is cut in parallel to the axis until it is located on the same line as the outer peripheral surface of the first small diameter shaft portion (50). When the lock member (5) is pushed in until the second small-diameter shaft portion (55) reaches a position corresponding to the locking groove (151), the third large-diameter portion regardless of the width of the engagement groove (151). (53) can be passed over it. In other words, the width of the engagement groove (151) is not determined by the diameter of the third large-diameter portion (53), but is formed to be smaller in accordance with the diameter of the second small-diameter shaft portion (55) having a smaller diameter. be able to. Therefore, the rattling of the operation handle (3) in the sealed state can be reduced as compared with the gas stopper of the second embodiment.

The exploded sectional view of the gas stopper in the 1st embodiment of the invention in this application. It is a principal part expanded sectional view of the gas stopper assembly completion state in 1st embodiment of this invention, Comprising: The 1st engagement position of the lock member (4) is shown. The principal part expanded sectional view of the gas stopper which shows the state which moved the lock member (4) to the 2nd engagement position from the state of FIG. The principal part expanded sectional view of the locking member (4) in a 2nd engagement position. The principal part expanded sectional view which shows the state in which the lock member (4) is located in a 3rd engagement position among the gas stoppers in 1st embodiment of this invention. The principal part expanded sectional view of the locking member (4) in a 3rd engagement position. It is a principal part expanded sectional view of the gas stopper in 2nd Embodiment of this invention, Comprising: The 1st engagement position of the lock member (5) is shown. It is a principal part expanded sectional view of the gas stopper in 2nd Embodiment of this invention, Comprising: The 2nd engagement position of the locking member (5) is shown. The principal part expanded sectional view of the gas stopper which shows a mode that the lock member (5) was pushed in from the state of FIG. It is a principal part expanded sectional view of the gas stopper in 2nd Embodiment of this invention, Comprising: The 3rd engagement position of the locking member (5) is shown. It is a principal part expanded sectional view of the gas stopper in 3rd Embodiment of this invention, Comprising: The 1st engagement position of the locking member (5) is shown. It is a principal part expanded sectional view of the gas stopper in 3rd Embodiment of this invention, Comprising: The 2nd engagement position of the locking member (5) is shown. It is a principal part expanded sectional view of the gas stopper in 3rd Embodiment of this invention, Comprising: The 3rd engagement position of the lock member (5) is shown. It is sectional drawing of the conventional gas stopper, Comprising: Explanatory drawing of the locking member in which an operation handle is in a rotation prevention state. It is principal part expanded sectional drawing of the conventional gas stopper, Comprising: (A) is explanatory drawing of the locking member in the state from which the operation handle was cancelled | released from the rotation prevention state, (B) is sealing of a gas stopper Indicates the state.

Explanation of symbols

(100) ... Gas flow path
(11) ・ ・ ・ ・ ・ Main body
(14) ・ ・ ・ ・ ・ Cylinder
(15) ・ ・ ・ ・ ・ Annular convex
(151) ...
(18) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Biasing means (coil spring)
(2)
(20) ...
(3) ・ ・ ・ ・ ・ ・ ・ Operation handle
(30) ............ annular groove
(30a) ... Bottom
(33) ・ ・ ・ ・ ・ Insertion hole
(4) ......... Lock member
(41) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ large diameter part
(41a) ... 1st plane part
(42) ・ ・ ・ ・ ・ Small diameter shaft
(42a) ... 2nd plane part
(43) ・ ・ ・ ・ ・ Large diameter shaft
(44) ・ ・ ・ ・ ・ Tool engaging groove
(45) ... 1st step
(46) ... 2nd step
(47) ・ ・ ・ ・ ・ 3rd stage

Claims (3)

A plug body having a configuration in which a cylindrical portion is continuously provided at an open end of a spiral accommodating portion that accommodates a spiral that opens and closes the gas flow path;
An annular groove is rotatably fitted to an annular convex portion formed at the open end of the cylindrical portion, and the spiral in the spiral accommodating portion is rotated between a closed position and an open position. An operation handle;
An insertion hole which is opened toward one side of the operation handle and is drilled toward the rotation center of the operation handle so as to communicate with the bottom of the annular groove,
A lock position that is rotatably inserted into the insertion hole and is urged to the open end side of the insertion hole by the urging means, and allows the operation handle to rotate. A gas stopper having a lock member set to be movable back and forth in the axial direction between the lock release position and
An engagement groove (151) is formed by cutting out a part of the open end of the annular protrusion (15),
The locking member (4) has a large-diameter portion (41) at the tip, a small-diameter shaft portion (42) that follows it, and has the same diameter as that of the large-diameter portion (41) and a tool engagement with the outer end surface. A large-diameter shaft portion (43) in which the groove (44) is formed is a metal round shaft coaxially positioned,
A portion of the outer peripheral surface of the large-diameter portion (41) on the small-diameter shaft portion (42) side is cut out in parallel to the axis to form a first flat surface portion (41a),
Of the outer peripheral surface of the small-diameter shaft portion (42), on the side where the first flat surface portion (41a) is formed, parallel to the first flat surface portion (41a) and from the first flat surface portion (41a). Is formed a second flat portion (42a) located one step deeper,
The lock member (4) is inserted into the insertion hole (33) against the urging force of the urging means, and the second flat portion (42a) is substantially the same as the bottom of the annular groove (30). The annular groove (30) can be rotatably fitted to the annular convex portion (15) in a state of facing the surface,
The lock member (4) has a first step portion (45) between the second flat surface portion (42a) and the first flat surface portion (41a) by the urging force of the urging means. A first engaging position engaging with the inner side of (15) and a second step portion (46) between the first flat surface portion (41a) and the outer peripheral surface of the large-diameter portion (41). While moving forward and backward between the second engagement position engaged from the inside to the open end of the groove (151),
After the lock member (4) is pushed into the first engagement position in a state corresponding to the engagement groove (151), the small-diameter shaft portion is rotated at a third engagement position rotated 180 degrees. The third step portion (47) between the outer peripheral surface of (42) and the large diameter portion (41) is set so as to engage with the open end of the engagement groove (151) from the inside. Gas stopper characterized by. A plug body having a configuration in which a cylindrical portion is continuously provided at an open end of a spiral accommodating portion that accommodates a spiral that opens and closes the gas flow path;
An annular groove is rotatably fitted to an annular convex portion formed at the open end of the cylindrical portion, and the spiral in the spiral accommodating portion is rotated between a closed position and an open position. An operation handle;
An insertion hole which is opened toward one side of the operation handle and is drilled toward the rotation center of the operation handle so as to communicate with the bottom of the annular groove,
A lock position that is rotatably inserted into the insertion hole and is urged to the open end side of the insertion hole by the urging means, and allows the operation handle to rotate. A gas stopper having a lock member set to be movable back and forth in the axial direction between the lock release position and
An engagement groove (151) is formed by cutting out a part of the open end of the annular protrusion (15),
The lock member (5) includes a first large diameter portion (51), a second large diameter portion (52) having a smaller diameter than the first large diameter portion (51), and a smaller diameter than the second large diameter portion (52). A first small-diameter shaft portion (50), a third large-diameter portion (53) having the same diameter as the first large-diameter portion (51), and a second small-diameter shaft portion having the same diameter as the second large-diameter portion (52) ( 55) and a fourth large-diameter portion (54) having the same diameter as the first and third large-diameter portions and having a tool engagement groove (56) formed on the outer end surface thereof, which is located on the same axis in order. With a round shaft,
A part of the outer peripheral surface of the third large-diameter portion (53) is cut away in parallel with the axis to form a flat portion (57) continuous on the same line as the outer peripheral surface of the second small-diameter shaft portion (55). ,
The lock member (5) is inserted into the insertion hole (33) against the urging force of the urging means, and the first small diameter shaft portion (50) is made to correspond to the annular groove (30). The annular concave groove (30) can be rotatably fitted to the annular convex portion (15),
The lock member (5) includes a first engagement position where the second large diameter portion (52) engages the annular convex portion (15) from the inside by an urging force of the urging means; The one large diameter portion (51) is set to be movable forward and backward between a second engagement position engaged with the open end of the engagement groove (151) from the inside,
In a state where the lock member (5) in the second engagement position is inserted until the second small diameter shaft portion (55) corresponds to the annular groove (151), the lock member (5) is 180 The step portion (58) between the outer peripheral surface of the third large-diameter portion (53) and the second small-diameter shaft portion (55) is in the engagement groove (151). The gas stopper is set so as to be engaged from the inside with the open end of).   3. The gas stopper according to claim 1, wherein the engagement groove is formed at two positions located on an axis line orthogonal to the gas flow path in the annular convex portion. Characteristic gas stopper.

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