JP2008069915A - Gas valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas valve having improved durability and operability by surely preventing the entry of water droplets into a gas valve body 1, comprising a cylinder portion 10 continuously provided at one opening end of a cap storage portion 11 turnably storing a cap 2, and a push-turn type operation knob 7 having a lock means 33 for locking, into a turn preventive condition, a driving shaft 4 connected to the cap 2 in the relative turn preventive condition. <P>SOLUTION: A metal cap member 23 is provided for closing the cylinder portion 10. First and second seal members 31, 32 are provided between the outer peripheral face of the cylinder portion 10 and the inner face of a peripheral wall 25 of the cap member 23 and between a shell portion 44a of the driving shaft 4 and an insertion hole 24a of the cap member 23, respectively. A distance L therebetween is set so that a reverse face 71 of the operation knob 7 abuts on a top face 24 of the cap member 23 when the operation knob is pushed therein more than a push-in size required for unlocking operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas stopper, and more particularly, to a gas stopper in which a flow path is opened and closed by pushing and turning an operation knob.

  Gas stoppers installed around the water in kitchens and bathrooms are often exposed to splashed water or detergent, or exposed to water vapor. Etc. easily enter the inside of the gas plug body. If water drops enter the gas plug body, it will corrode the internal thread and other parts and sliding parts, which may cause problems in opening and closing the gas valve and causing gas leakage. . In order to solve such a problem, there is a waterproof structure that covers the open end of the gas stopper main body with a watertight cover to prevent water from entering the gas stopper main body.

  As a gas stopper provided with this type of waterproof structure, a gas stopper disclosed in Japanese Patent Laid-Open No. 2002-39403 (Patent Document 1) has been proposed. As shown in FIG. 7, this gas plug is provided with a gas plug main body having a screw tube portion to which a gas pipe is connected at both ends and a tube portion (10) provided continuously above the thread housing portion (11). 1), a thread (2) that is rotatably accommodated in the thread accommodating part (11), and a drive shaft that is coupled to the thread (2) via a coil spring (3) in a state that prevents relative rotation. (4), a locking plate (6) as a locking means for restricting the rotation range of the drive shaft (4), and an operation shaft portion (40) of the drive shaft (4) connected in a state of preventing relative rotation. And an operation knob (7) covering the range up to the cylinder part (10), and the operation knob (7) and the operation shaft part (40) are screwed together by a fixing bolt (8). It is connected.

  An elastic synthetic resin waterproof cap (5) provided with an opening (51) larger in diameter than the operation shaft portion (40) is externally fitted to the upper open end of the cylindrical portion (10), and the cap ( On the upper side of 5), a disc-shaped elastic synthetic resin waterproof plate (50) tightly fitted on the operation shaft (40) is slidably overlapped with the waterproof cap (5).

In this conventional one, the waterproof cap (5) and the waterproof plate (50) are both molded from polypropylene, which is an elastic synthetic resin, and by the elastic force, a through hole (53) formed in the center of the waterproof plate (50) The peripheral edge of the waterproof cap (5) is closely fitted into the groove (43) formed at the base end of the operation shaft (40), and at the same time, the peripheral wall (52) of the waterproof cap (5) is tightly fitted to the cylinder (10) Further, by fitting the waterproof plate (50) to the groove portion (43) in a state of being prevented from coming off upward, the mounting state is elastically pressed against the upper surface of the waterproof cap (5). Prevents water droplets and detergent from entering between the operation knob (7) and the gas plug body (1) and from the threaded part of the fixing bolt (8) from entering the gas plug body (1). ing.
JP 2002-39403 A JP 2005-195055 A

  However, in the waterproof cap (5) as described above, between the peripheral wall (52) of the waterproof cap (5) and the cylindrical portion (10), and the through hole (53) of the waterproof plate (50) and the operation shaft portion. (40) is not completely sealed, so in a high humidity environment such as a bathroom, the gas plug body (1) has the same high humidity as the bathroom. In this case, water droplets cannot be prevented from adhering to the inside of the gas stopper main body (1), and the inside of the gas stopper main body (1) and the pipe (2), and further, ) And the inconvenience of causing rusting on the sliding part is not solved. Further, when lubrication / seal grease is interposed in the sliding part, the grease deteriorates, and the sliding part is fixed, resulting in deterioration of the operability of the operation knob (7). .

  Japanese Patent Laying-Open No. 2005-195055 (Patent Document 2) discloses a structure in which an O-ring as a seal member is provided between the inner peripheral surface of the operation knob and the outer peripheral surface of the cylinder portion of the gas plug main body. ing.

  In this case, it is possible to prevent water and the like from entering between the operation knob and the gas plug body, but since the volume of the space sealed with the waterproof seal is large, the operation knob is pushed downward and turned. In the case of a gas plug having a push-type operation knob for releasing the lock state, when the operation knob is pushed in, the pressure in the sealed space increases. As a result, the thread has a disadvantage that a large force acts in the push-in direction, the operation knob is turned heavy, and the operability is deteriorated.

  In addition, when the waterproof structure consisting of the waterproof cap (5) and waterproof plate (50) detailed above is applied to a gas stopper equipped with a push-type operation knob, the operation knob is pushed more than necessary. As a result, there is a disadvantage that the waterproof function is lost because the waterproof cap (5) and the waterproof plate (50) are deformed or damaged on the back surface of the operation knob (7).

The present invention is `` a gas plug main body having a configuration in which a cylindrical portion is continuously provided at one open end of a thread accommodating portion,
In the case where the spiral is accommodated in the spiral accommodating portion,
A drive shaft connected to the screw via a biasing means in a relative rotation blocking state;
An operation knob fixed to the operation shaft portion of the drive shaft in a state of preventing relative rotation and capable of pushing the drive shaft into the thread side against the biasing means;
A lock means for locking the drive shaft in a rotation preventing state,
The lock state of the drive shaft is released by pushing a predetermined amount of the drive shaft into the thread side together with the operation knob and turning it in order to prevent water droplets or detergent from entering the gas plug body. An object of the present invention is to provide a gas stopper that can be surely prevented and that has good operability without damaging the waterproof function even when the operation knob is pushed.

(1) The gas plug of the invention according to claim 1 is a metal cap having an insertion hole that is externally fitted to the cylindrical portion and through which the body portion of the drive shaft is slidably inserted at the center of the top surface. Members are provided,
Between the outer peripheral surface of the cylinder part and the peripheral wall of the cap member, and between the body part of the drive shaft and the insertion hole, first and second seal members are provided, respectively.
From the back surface of the operation knob in the natural state so that the back surface of the operation knob comes into contact with the top surface of the cap member when the operation knob is pushed in more than the push-in dimension necessary for releasing the locked state. The distance to the top surface of the cap member is set.
In the gas stopper according to the present invention, the thread housed in the thread housing portion is connected to the operation knob in a state of preventing relative rotation through the drive shaft. Rotate.
The drive shaft can be locked in a rotation-prevented state by a lock means, and constitutes a push-type gas stopper that is released from the locked state by pushing the drive shaft together with an operation knob and turning it in a predetermined direction.

  In addition, a metal cap member is tightly fitted to the cylindrical portion via the first and second seal members, and the gas plug body is completely sealed off from the outside of the cap member. . For this reason, even if water drops, detergent, etc. enter from between the operation knob and the cylinder part of the gas stopper body, these water drops, detergent, etc. are blocked by the cap member and do not enter the gas stopper body. . Even if the gas stopper is used in a high humidity environment, the humidity in the gas stopper main body is not affected.

  Further, when the operation knob is pushed in more than the push-in dimension required for unlocking, the operation knob is not pushed in more than the necessary push-in amount because the back face of the operation knob is set to a dimension that abuts the top surface of the cap member. As described above, the top surface of the cap member also functions as a stopper for restricting the pushing amount of the operation knob.

  (2) The gas stopper of the invention according to claim 2 is the gas stopper according to claim 1, wherein “the top surface of the cap member is provided at a position higher than the upper end of the peripheral wall”. The water droplets and detergent that penetrates into the operation knob from between the operation knob and the cylinder portion of the gas plug body and adheres to the surface of the cap member flow from the top surface toward the peripheral wall, and the outer peripheral surface of the peripheral wall. Is discharged to the outside.

  (3) The gas plug of the invention according to claim 3 is the gas plug according to claim 1 or 2, wherein “a male screw portion is formed on the outer peripheral surface of the cylindrical portion, and the inner wall of the cap member In the case where the male threaded portion is formed on the peripheral surface, the cap member can be securely attached to the tube portion by screwing the male threaded portion and the female threaded portion. Can do.

  Note that the male screw portion and the female screw portion may be provided in the entire area of each surface or may be provided in part. For example, the male screw portion is provided only in the vicinity of the open end of the cylindrical portion, and the female screw portion is provided so as to be positioned below the range corresponding to the male screw portion when the cap member is attached to the cylindrical portion. In the configuration, the cap member is externally fitted to the tube portion from above by screwing the female screw portion to the male screw portion, and when the female screw portion is removed from screwing with the male screw portion. The mounting of the cap member is completed. In the mounted state, the male screw portion and the female screw portion are not screwed together, but the upper end of the female screw portion contacts the lower end of the male screw portion, so that the cap member is prevented from coming off upward. In this case, in order to remove the cap member, the cap member is pulled up, both screws are forcibly screwed together, and the cap member is rotated in the direction in which the screw is removed.

  (4) The gas stopper of the invention according to claim 4 is the gas stopper according to claims 1 to 3, wherein “the top surface of the cap member is provided with a through hole communicating with the inside and outside of the cap member; Even if the pressure in the gas plug body closed by the cap member changes when the drive shaft is pushed down, the through hole is filled. Since the internal pressure can be adjusted via the ventilation waterproof member, the pressure in the gas plug body can be kept constant at all times. In addition, since the air-permeable waterproof member has a waterproof effect, water drops, detergents and the like adhering to the surface of the cap member do not enter the gas plug main body from the through hole.

(5) The gas stopper of the invention according to claim 5 is a gas stopper main body having a configuration in which a cylindrical portion is continuously provided at one open end of the thread accommodating portion;
In the case where the spiral is accommodated in the spiral accommodating portion,
A drive shaft connected to the screw via a biasing means in a relative rotation blocking state;
An operation knob fixed to the operation shaft portion of the drive shaft in a state of preventing relative rotation and capable of pushing the drive shaft into the thread side against the biasing means;
A lock means for locking the drive shaft in a rotation preventing state,
The lock state of the drive shaft is for solving the same problem as the above-mentioned problem in the gas stopper configured to be released by pushing the drive shaft into the thread side together with the operation knob and turning it. The technical means is: `` a metal cap member is provided that is externally fitted to the cylindrical portion and has an insertion hole through which a body portion of the drive shaft is slidably inserted in the center of the top surface.
Between the outer peripheral surface of the cylinder part and the peripheral wall of the cap member, and between the body part of the drive shaft and the insertion hole, first and second seal members are provided, respectively.
A stepped portion is provided at a predetermined position on the outer peripheral surface of the peripheral wall of the cap member,
The open end of the operation knob in the natural state so that the open end of the operation knob comes into contact with the stepped portion of the cap member when the operation knob is pushed beyond the push-in dimension required to release the locked state. The distance from the step portion to the step portion is set. ”As for the waterproof function of the cap member, the same action as in the first aspect occurs, and the operation knob is necessary for unlocking. When pushed in beyond the push-in dimension, the open end of the operation knob comes into contact with the stepped portion of the cap member, so that the operation knob is not pushed further. In this case, the step portion functions as a stopper that restricts the amount of pressing of the operation knob.

  According to the first aspect of the present invention, since the metal cap member is fitted in an airtight state on the open end of the cylindrical portion of the gas plug main body, the inside of the gas plug main body is secured in a watertight state. As a result, waterproofing and rust prevention are ensured in the gas container main body and the gas cylinder main body and the sliding portion thereof, the operability of the gas valve can be prevented from being deteriorated, and the durability of the gas plug is improved. Therefore, the gas stopper can be used for a long time even in a high humidity environment such as a kitchen, a kitchen, and a bathroom.

  Further, since the top surface of the cap member functions as a stopper for restricting the pushing amount of the operation knob, the operation knob and the drive shaft are not pushed more than necessary. Therefore, it is possible to prevent the seal members from being deteriorated or damaged without excessive frictional force acting on the first and second seal members. Furthermore, since excessive force due to excessive pressing of the operation knob and the drive shaft does not act on the main body and the gas plug body, durability is improved.

Further, since the body portion of the drive shaft is held by the insertion hole of the metal cap member, the posture is stable, and the operation corresponding to the operation of the operation knob can be accurately transmitted.
Since the volume change amount of the airtight space in the cylinder part due to the pushing of the drive shaft is less than that of a structure in which a seal member is provided between the inner peripheral surface of the operation knob and the outer peripheral surface of the cylinder part of the gas plug body, The screw can be pushed in with a slight force, and the operation knob can be smoothly rotated.

According to the second aspect of the invention, in addition to the above effect, there is an effect that water droplets or the like that have entered the operation knob can be easily discharged to the outside.
According to the invention of claim 3, even when the cap member is securely attached to the cylindrical portion and the pressure in the airtight space below the cap member is increased, the cap member may be inadvertently detached from the cylindrical portion. Absent.

According to the invention which concerns on Claim 4, even if a change arises in the pressure in the said airtight space, it can be adjusted and it can always be kept at a constant pressure.
According to the invention according to claim 5, since the same effect as in claim 1 is produced, it can be visually confirmed that the open end portion of the operation knob contacts the stepped portion of the cap member. The amount of pressing of the operation knob can be adjusted, which makes it easier to use and improves durability.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of an assembled state of a gas stopper according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.
In the gas plug of this embodiment, the gas inflow passage (12) and the gas outflow passage (13) are coaxially connected to the left and right of the thread accommodating portion (11) opened above the gas plug main body (1). In the spiral accommodating portion (11), an inverted frustoconical spiral (2) that communicates or blocks the flow path from the gas inflow passage (12) to the gas outflow passage (13) is circulated. It is housed freely.

The inner circumferential surface of the thread housing part (11) and the outer circumferential surface of the thread (2) are slidable sliding parts, and waterproof grease (30) is applied to the upper end part. In addition, an annular shock absorbing member (37) is attached from above.
A cylindrical portion (10) is continuously provided at the upper open end of the thread accommodating portion (11), and at each position facing the center of the cylindrical portion (10), as shown in FIG. The notches 14 and 14 are formed so as to open upward.

An annular groove is formed in the outer peripheral surface below the notches (14) and (14), and the first seal member (31) is loaded in the annular groove.
A gas passage hole (21) communicating with the gas inflow passage (12) and the gas outflow passage (13) passes through the spiral (2), and a substantially rectangular parallelepiped shaft is formed at the center of the upper surface of the spiral (2). The portion (20) protrudes so that its long side is positioned parallel to the gas passage hole (21). And the annular groove part (2a) for receiving a coil spring (3) is formed so that the base end part may be enclosed.

  The shaft portion (20) is configured to fit in a rectangular hole (46) that is open to the lower surface of the drive shaft (4) described later, and the shaft portion (20) is formed into a rectangular hole ( By being internally fitted in 46), the screw (2) and the drive shaft (4) are connected in a state of preventing relative rotation.

  The drive shaft (4) is a substantially cylindrical body that is connected to the thread (2) via the coil spring (3) and accommodated in the cylindrical portion (10) in the manner described above, and has two upper and lower body portions ( 44a) (44b), an upper surface of the upper body (44a) is provided with a substantially rectangular parallelepiped operating shaft (40), and a rectangular hole is formed at the center of the lower surface of the lower body (44b). The locking projections (45) and (45) are outward from the respective positions facing the center of the lower end of the lower body (44b), while the portion (46) is formed in a downwardly opened state. It protrudes toward you.

  The operation shaft portion (40) is fitted in a rectangular recess (72) formed in the lower open state in the center of the operation knob (7), and is a fixing bolt inserted from above the operation knob (7). (8) is screwed into the operation knob (7).

A locking cylinder (33) for restricting the rotation of the drive shaft (4) is disposed above the drive shaft (4).
The locking cylinder (33) is fitted on the lower body (44b) of the drive shaft (4) and, as shown in FIG. It is a substantially cylindrical body projecting toward the direction, by fitting the tongue pieces (34), (34) into the notches (14), (14) formed in the cylindrical portion (10), The locking cylinder (33) is housed in a rotation-stopped state in the cylinder part (10).

  Further, at each of the opposing positions of the lower end portion of the locking cylinder (33), a pair of locking areas (35) (35) formed by notching a predetermined depth from the lower end part, and the locking area (35 ) (35) and a pair of rotation areas (36) (36) formed by cutting away shallower than the locking areas (35) (35).

The width of the locking area (35) (35) is set to a size that the locking protrusions (45) (45) of the drive shaft (4) are just fitted and engaged, and the locking area The cutout range from (35) to the rotation area (36) is set to about 90 degrees, which is the movement range of the locking projections (45) and (45).
In the vicinity of the open end in the cylinder part (10), a C-shaped locking ring (15) for accommodating the drive shaft (4) and the locking cylinder (33) provided above the drive shaft (4) in a retaining state. ) Is fixed.

Further, in this embodiment, a metal cap member (23) is provided which is fitted on the cylinder portion (10) and closes the upper open portion.
The cap member (23) has a peripheral surface (25) that fits outside the cylindrical portion (10), and a top surface on which an insertion hole (24a) into which the upper body portion (44a) of the drive shaft (4) can be inserted ( 24), and the range from the upper end of the peripheral wall (25) to the top surface (24) is formed in a taper shape with a diameter decreasing upward.
In addition, the 2nd seal member (32) is loaded in the annular groove part formed in the internal peripheral surface of a through-hole (24a).

An O-ring can be used as each of the first and second seal members (31) and (32).
An annular spring receiving portion (47) is formed on the lower surface of the drive shaft (4) facing the annular groove portion (2a) of the thread (2), and the annular groove portion (2a) and the spring receiving portion (47) In the meantime, the coil spring (3) is accommodated in a compressed state.

  The drive shaft (4) and the thread (2) are urged away from each other, and the locking cylinder (33) is housed in a state of being prevented from coming off by a C-shaped locking ring (15). Thus, the locking projections (45), (45) of the drive shaft (4) are pressed against the lower end of the locking cylinder (33) by the biasing force of the coil spring (3), and the locking projections (45) ( When 45) is fitted into the locking region (35) of the locking cylinder (33), the drive shaft (4) is locked while being prevented from rotating. In this way, the locking cylinder (33) functions as a locking unit that locks the drive shaft (4) in the rotation-blocking state.

When the drive shaft (4) is pushed downward by a predetermined dimension against the biasing force of the coil spring (3), the locking projections (45) and (45) move downward from the locking areas (35) and (35). The locked state is released by releasing. In this state, the drive shaft (4) can be rotated in the range (90 degrees) where the locking projections (45) and (45) extend from the locking area (35) to the rotating area (36).
That is, in the case of this embodiment, the difference in depth between the locking area (35) and the rotation area (36) is the push-in dimension necessary for releasing the locked state.

Hereinafter, the assembly of the gas stopper will be described.
The screw (2) is stored in the screw holder (11) of the gas plug body (1), and the waterproof grease (30) is placed at the upper end of the sliding part between the screw (2) and the screw holder (11). And an annular shock absorbing member (37) is attached from above.

  After arranging the coil spring (3) in the annular groove (2a), the upper end of the coil spring (3) is made to correspond to the spring receiving part (47) on the lower surface of the drive shaft (4) (2 ) Is fitted into the rectangular hole (46) of the drive shaft (4).

  Next, the lower barrel (44b) of the drive shaft (4) is inserted into the locking cylinder (33), and the locking protrusions (45) (45) of the drive shaft (4) are inserted into the locking cylinder ( 33), the locking cylinder (33) is pushed downward together with the drive shaft (4) against the urging force of the coil spring (3), corresponding to the locking area (35) or the rotation area (36). The tongue pieces (34) and (34) of the locking cylinder (33) are fitted into the notches (14) and (14) of the cylinder part (10), and the C-shaped locking ring (15) is inserted into the cylindrical part (15) from above. Fix in place in 10).

As a result, the drive shaft (4) and the locking cylinder (33) are housed in the cylinder portion (10) of the gas plug main body (1) in a retaining state.
In this state, if the locking projections (45) and (45) of the drive shaft (4) correspond to the locking area (35) of the locking cylinder (33), the drive shaft (4) rotates. It is locked in the blocking state.

Then, the cap member (23) is inserted into the insertion hole (24a) while the operating shaft part (40) protruding from the upper surface of the drive shaft (4) and the upper body part (44a) following the operation shaft part (44a) are inserted into the cylindrical part (10). Fit outside.
In this external fitting state, the space between the outer peripheral surface of the cylindrical portion (10) and the inner surface of the peripheral wall (25) of the cap member (23) is sealed by the first seal member (31), and the drive shaft (4) The space between the upper body portion (44a) and the insertion hole (24a) of the cap member (23) is sealed by the second seal member (32), and the cylindrical portion (10) covered with the cap member (23) ), An airtight space (17) is formed.

  After that, cover the operation shaft (40) on the upper surface of the drive shaft (4) with the operation knob (7) so that it fits into the rectangular recess (72) of the operation knob (7), and screw and connect with the fixing bolt (8) By doing so, the assembly of the gas stopper is completed.

To release the locked state in which the locking projections (45) and (45) of the drive shaft (4) correspond to the locking areas (35) and (35) of the locking cylinder (33), as described above. The operation knob (7) is pushed down by the difference in depth between the locking area (35) and the rotation area (36). As a result, the drive shaft (4) is also pushed downward together with the operation knob (7), and the engagement between the locking projections (45) (45) and the locking areas (35) (35) is released. The convex portions (45) and (45) are movable toward the rotation areas (36) and (36). As a result, the thread (2) can be rotated within a range of 90 degrees.
The distance (L) between the back surface (71) of the operation knob (7) and the top surface (24) of the cap member (23) is the push-in dimension necessary for releasing the locked state (the locking area (35) and (Which corresponds to the difference in the depth of the rotation area (36)).

Therefore, as shown in FIG. 3, when the operation knob (7) is pushed in, the back surface (71) comes into contact with the top surface (24) of the cap member (23), and the locking means can be released in this state. Therefore, the operation knob (7) is not inadvertently pushed beyond the pushing dimension necessary for releasing the locking means. As described above, the top surface (24) of the cap member (23) functions as a stopper for regulating the push-in dimension of the operation knob (7). As a result, it is possible to prevent deterioration and damage due to wear of the second seal member (32) caused by pushing the operation knob (7) and the drive shaft (4) more than necessary, and each of the components in the gas plug body (1). Damage and breakage of parts can also be prevented.
In the above embodiment, the operation knob (7) is covered so as to cover the cap member (23), but since the gap between the two is not sealed, the operation knob (7) and the cap member ( Water drops, detergent, etc. enter from the gap between the peripheral wall (23) of 23).

  These water droplets and detergent may adhere to the inner surface of the operation knob (7) and the surface of the cap member (23), but the inside of the cylindrical portion (10) is closed in an airtight state by the cap member (23). Therefore, water drops and detergent do not enter the cylinder part (10) of the gas plug body (1) below the cap member (23), and the waterproof and rustproofing in the airtight space (17) Is certain. Moreover, it is not affected by external humidity.

Furthermore, water droplets and the like adhering to the surface of the cap member (33) flow through the tapered surface from the top surface (24) to the peripheral wall (25) and are discharged to the outside from the open end of the operation knob (7). .
The drive shaft (4) is inserted into the insertion hole (24a) of the metal cap member (23) and the upper body (44a) is tightly inserted into the screw shaft (2) and the operation knob (7). On the other hand, a stable posture can be maintained on the same axis. Therefore, in response to the push or rotation operation of the operation knob (7), the operation is stably performed and the operation can be accurately transmitted.

The gas stopper according to the second embodiment of the present invention shown in FIG. 4 is a gas stopper of the same type as the gas stopper employed in the first embodiment, and the peripheral wall (25) of the cap member (23). A female screw part (26) is formed on the inner surface of the cylindrical part, and a male screw part (16) is formed on the outer peripheral surface of the cylindrical part (10). It is configured to be fitted to the open end of the portion (10).
In this embodiment, the annular groove portion for accommodating the first seal member (31) is formed below the male screw portion (16), and the annular groove portion for accommodating the second seal member (32) is It is formed in the upper body part (44a) of the drive shaft (4).

  In this case, both the first and second sealing members (31) and (32) are mounted on the gas plug main body (1) side (the cylindrical portion (10) and the drive shaft (4)). 23) is easy to manufacture. Further, the cap member (23) can be attached to the open end of (10) in an airtight state simply by screwing the male screw portion (16) and the female screw portion (26). ) Can be easily attached to and removed from the gas stopper body (1). And unless the cap member (23) is intentionally rotated, the threaded engagement with the cylindrical portion (10) of the cap member (23) is not loosened, so that the mounting state can be reliably maintained.

  In this embodiment, the distance (L) between the back surface (71) of the operation knob (7) and the top surface (24) of the cap member (23) is slightly smaller than the push-in dimension necessary for releasing the locked state. The top surface (24) functions as a stopper that regulates the push-in dimension of the operation knob (7).

  FIG. 5 shows a gas stopper according to the third embodiment, in which a top surface (24) of a cap member (23) is provided relatively wide, and a through-hole penetrating into and out of the top surface (24). (27) is formed, and the ventilation hole (27) is filled in the through hole (27). This breathable waterproof member (28) is a member that is breathable but not water permeable, and for example, a porous sheet of ultrahigh molecular weight polyethylene resin can be adopted.

  According to this embodiment, even if the pressure of the airtight space (17) in the gas plug main body (1) sealed by the cap member (23) is changed by pushing the operation knob (7) or the like, the cap member The ventilation waterproofing member (28) provided in (23) allows internal pressure adjustment, so there is no need to apply extra force when pushing the control knob (7), and the rotation of the screw (2) Operation is not heavy.

In this embodiment, a male screw portion (16) is formed on the outer peripheral surface of the cylindrical portion (10) and the cap member (23) as in the case of the gas plug of the second embodiment described above. ) Is formed on the inner surface of the peripheral wall (25), but when the cap member (23) is completely attached, the two do not screw together and the male screw portion (16) The formation positions of both are set so that the female screw portion (26) is positioned immediately below. In this case, when the male screw portion (16) and the female screw portion (26) are screwed together, the cap member (23) naturally falls when the screwing of both ends. This is a state where the mounting is completed, and the cap member (23) is prevented from coming off when the upper end of the female screw portion (26) contacts the lower end of the male screw portion (16). When removing the cap member (23), the cap member (23) may be pulled upward and the female screw portion (26) may be forcibly screwed into the male screw portion (16).
In this embodiment as well, the top surface (24) of the cap member (23) is made to function as a stopper for regulating the pushing amount of the operation knob (7).

  FIG. 6 shows a gas stopper according to the fourth embodiment. A step portion (29) is provided in the circumferential direction on the outer peripheral surface of the peripheral wall (25) of the cap member (23), and the step portion ( The distance (L1) between the top surface of 29) and the lower end of the peripheral wall (25) of the cap member (23) is slightly larger than the push-in dimension of the operation knob (7) required to release the locked state. Set. Therefore, in the gas stopper of this embodiment, when the operation knob (7) is pushed in, the lower end portion of the peripheral wall (25) comes into contact with the top surface of the step portion (29), and the locking means can be released in that state. It becomes. That is, the top surface of the stepped portion (29) functions as a stopper for restricting the push-in dimension of the operation knob (7).

In this case, the distance between the back surface (71) of the operation knob (7) and the top surface (24) of the cap member (23) is the distance between the stepped portion (29) and the open end of the cap member (23). It should be set equal to or higher than (L1).
By adjusting the diameter of the top surface (24) to the size of the back surface (71) of the operation knob (7), both are received when the back surface (71) is brought into contact with the top surface (24). Impact can be reduced.

  In the gas stoppers of the above embodiments, a seal member is provided between the cap member (23) and the cylinder portion (10), and the cylinder portion (10) closed by the cap member (23) is hermetically sealed. Since the space (17) is configured, a seal portion is provided between the operation knob (7) and the cylinder portion (10), and the entire area inside the operation knob (7) is an airtight space. The volume change amount of the airtight space due to the pushing operation of the operation knob (7) is small. As a result, only a small amount of force is required to turn the knob (2) without pushing the operation knob (7), and the turning operation of the gas plug becomes light.

Sectional drawing of the assembly completion state of the gas stopper in 1st Embodiment of this invention. The disassembled perspective view of the gas stopper in 1st embodiment of this invention. Explanatory drawing which shows the state which pushed in the operation knob from the state of FIG. Sectional drawing of the assembly completion state of the gas stopper in 2nd Embodiment of this invention. Sectional drawing of the assembly completion state of the gas stopper in 3rd Embodiment of this invention. Sectional drawing of the assembly completion state of the gas stopper in 4th Embodiment of this invention. Sectional drawing of the assembly completion state of the gas stopper of a prior art example.

Explanation of symbols

(1) ・ ・ ・ ・ ・ ・ ・ Gas stopper body
(10) ... Cylinder
(11) ....
(2) ...
(23) ... Cap member
(24) ・ ・ ・ ・ ・ ・ ・ Top
(24a) ...
(3) ・ ・ ・ ・ ・ ・ ・ Biasing means (coil spring)
(31) ・ ・ ・ ・ ・ ・ ・ First seal member
(32) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Second seal member
(33) ... Lock means (locking cylinder)
(4) ・ ・ ・ ・ ・ ・ ・ Drive shaft
(44a) ・ ・ ・ ・ ・ ・ Upper trunk
(7) ・ ・ ・ ・ ・ ・ ・ Operation knob

Claims (5)

A gas stopper main body having a configuration in which a cylindrical portion is continuously provided at one open end of the spiral housing portion;
In the case where the spiral is accommodated in the spiral accommodating portion,
A drive shaft connected to the screw via a biasing means in a relative rotation blocking state;
An operation knob fixed to the operation shaft portion of the drive shaft in a state of preventing relative rotation and capable of pushing the drive shaft into the thread side against the biasing means;
A lock means for locking the drive shaft in a rotation preventing state,
The lock state of the drive shaft is a gas stopper configured to be released by pushing the drive shaft together with the operation knob into the thread side and turning it.
A metal cap member having an insertion hole that is externally fitted to the cylindrical portion and into which a body portion of the drive shaft is slidably inserted at the center of the top surface is provided,
Between the outer peripheral surface of the cylinder part and the peripheral wall of the cap member, and between the body part of the drive shaft and the insertion hole, first and second seal members are provided, respectively.
From the back surface of the operation knob in the natural state so that the back surface of the operation knob comes into contact with the top surface of the cap member when the operation knob is pushed in more than the push-in dimension necessary for releasing the locked state. A gas stopper, wherein a distance to the top surface of the cap member is set.   The gas plug according to claim 1, wherein the top surface of the cap member is provided at a position higher than an upper end of the peripheral wall.   3. The gas plug according to claim 1, wherein a male screw portion is formed on an outer peripheral surface of the cylindrical portion, and a female screw capable of screwing the male screw portion on an inner peripheral surface of the peripheral wall of the cap member. A gas stopper characterized in that a portion is formed.   The gas stopper according to any one of claims 1 to 3, wherein a through hole communicating with the inside and outside of the cap member is provided on the top surface of the cap member, and a ventilation waterproof member is filled in the through hole. A gas stopper characterized by that. A gas stopper main body having a configuration in which a cylindrical portion is continuously provided at one open end of the spiral housing portion;
In the case where the spiral is accommodated in the spiral accommodating portion,
A drive shaft connected to the screw via a biasing means in a relative rotation blocking state;
An operation knob fixed to the operation shaft portion of the drive shaft in a state of preventing relative rotation and capable of pushing the drive shaft into the thread side against the biasing means;
A lock means for locking the drive shaft in a rotation preventing state,
The lock state of the drive shaft is a gas stopper configured to be released by pushing the drive shaft together with the operation knob into the thread side and turning it.
A metal cap member having an insertion hole that is externally fitted to the cylindrical portion and into which a body portion of the drive shaft is slidably inserted at the center of the top surface is provided,
Between the outer peripheral surface of the cylinder part and the peripheral wall of the cap member, and between the body part of the drive shaft and the insertion hole, first and second seal members are provided, respectively.
A stepped portion is provided at a predetermined position on the outer peripheral surface of the peripheral wall of the cap member,
The open end of the operation knob in the natural state so that the open end of the operation knob comes into contact with the stepped portion of the cap member when the operation knob is pushed beyond the push-in dimension required to release the locked state. A gas stopper, wherein a distance from a part to the step part is set.

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