JP4227634B2 - Gas stopper - Google Patents

Description

  The present invention relates to a gas stopper, and more particularly, to a gas stopper having a structure in which grease for lubrication / sealing is interposed in a sliding portion between a screw and a screw housing portion.

  In general, as shown in FIG. 7, the gas stopper is formed with a thread accommodating portion (30) that opens upward in the drawing in the center of the gas flow path (31a) that is inserted into the gas stopper main body (31). At the same time, a truncated cone-shaped thread (3) that can be rotated by an operation handle (35) is housed in the thread accommodating part (30).

  The gas passage hole (3a) passes through the thread (3), and as shown in the figure, the gas passage main body (31) and the gas channel (31a) in the fully open state, It rotates between the fully closed state rotated 90 degrees.

  A cylindrical portion (33) is extended above the spiral housing portion (30), and at the center of the upper surface of the spiral (3), the operation handle (35) is fitted in a state of preventing relative rotation, and An operation shaft (32) for rotating the screw (3) is projected.

  When attaching the operation handle (35) to the cylinder part (33) of the gas plug main body (31), press the gap between the upper surface of the thread (3) in the gas plug main body (31) and the operation handle (35). The spring (4) is interposed in a compressed state. As a result, the thread (3) is housed in a state of being pushed into the thread housing part (30) by the biasing force of the presser spring (4).

In particular, since the gas stopper for the gas meter is installed outdoors, it is necessary to prevent rainwater from entering the gas stopper main body (31). As such a waterproof structure, a structure disclosed in Japanese Utility Model Publication No. 63-7738 has been proposed.
In this case, as shown in the figure, a grease reservoir portion (10) is provided over the entire upper end of the sliding portion (22) between the thread (3) and the thread accommodating portion (30), and the grease reservoir section ( 10) Grease (2) for lubrication and sealing is filled in, and a covering ring (21) made of an elastic material is coated thereon.

The grease (2) interposed in the sliding part (22) flows down the sliding part (22) by leaving it for a long time, but the upper end of the sliding part (22) is lubricated and sealed with grease ( Since the grease reservoir (10) filled with 2) is provided, the grease (2) is transferred from the grease reservoir (10) to the sliding portion (22) according to the amount of flow of the sliding portion (22). ) Is replenished to prevent the grease from running out.
Further, rainwater or the like that has entered from the gap between the operation handle (35) and the thread (3) accumulates on the upper surface of the covering ring (21) and prevents entry into the grease (2).
Japanese Utility Model Publication No. 63-7738

  However, in the gas stopper of the conventional configuration, the grease for lubrication and sealing (2) in the grease reservoir (10) is covered with the covering ring (21), but is not completely sealed. The base oil component of the grease (2) may evaporate due to changes in temperature and humidity surrounding the gas stopper. When the base oil component evaporates, the waterproof function by the grease (2) is lowered, and the sliding portion (22) cannot be sufficiently protected in a bathroom with high humidity.

  In addition, when detergent or the like enters the gas stopper main body (31) and enters the grease reservoir (10) from between the inner peripheral wall of the gas stopper main body (31) and the covering ring (21), Lubrication / seal grease (2) may be deteriorated. In this case, the deteriorated grease (2) adheres to the upper end of the sliding part (22), or rust is generated on the sliding part (22). There is an inconvenience that it becomes impossible.

According to the present invention, “a gland opening part that opens to one side of the gas plug body and communicates with the gas flow path is rotatably accommodated through a sliding part. A grease reservoir filled with grease for lubrication and sealing is provided in an annular shape around the entire upper end of the sliding portion, and is connected to the operation handle in a state of preventing relative rotation at the center of the upper surface of the thread. In the gas stopper in which an operation shaft is provided and a pressing spring is provided along the operation axis between the upper surface of the thread and the operation handle in a compressed state .
An object is to reliably prevent evaporation and deterioration of the base oil component of the grease for lubrication and sealing.

The solution of the present invention taken to solve the above-mentioned problem is as follows: "The grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The first and second waterproof grease filling portions are entirely covered with an annular protective cover,
The protective cover is configured to cover a range from the inner peripheral wall of the gas plug main body to the operation shaft through the upper surface of the spiral,
The presser spring is set so as to press the upper surface of the thread through the protective cover .
By filling the grease reservoir provided in the entire peripheral area of the upper end of the sliding portion with the thread and the thread housing portion with lubrication / seal grease, the lubricity of the rotation operation of the thread and the seal at the sliding portion Sex is secured. The grease reservoir is covered with a covering ring, and a first waterproof grease filling portion is provided on the outer peripheral side of the covering ring, and a second waterproof grease filling portion is provided on the inner peripheral side. These first and second waterproof grease filling portions may be configured independently of each other, or may be configured to be continuous on the upper surface of the covering ring.

  The waterproof grease to be filled in the first waterproof grease filling portion is provided so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread accommodating portion, and the waterproof grease to be filled in the second waterproof grease filling portion is: Since the outer surface of the grease reservoir is sealed in an airtight state by the waterproof grease in the first waterproof grease filling portion, the inside of the grease reservoir is filled with the second waterproof grease. It is blocked in an airtight state by waterproof grease inside the unit. As a result, the grease reservoir is completely blocked from the internal space of the gas plug main body communicating with the outside of the gas plug, and is maintained in a sealed state. Further, since the waterproof grease is covered with the protective cover, it does not flow out from the first and second waterproof grease filling portions to other places.

  In addition, the protective cover covers the range from the inner peripheral wall of the gas plug main body to the operation shaft through the upper surface of the thread, thereby reliably protecting the entire area above the grease reservoir and the first and second waterproof grease filling parts. Covered by a cover. In addition, the protective cover is mounted on the upper surface of the thread by the urging force of the presser spring that pushes the thread into the thread housing portion.

According to a second aspect of the present invention, there is provided a gas stopper that opens to one side of the gas stopper main body and that opens and closes the gas flow path in a thread accommodating section that communicates with the gas flow path, and is freely rotatable via a sliding portion. In the gas stopper in which the grease reservoir portion is provided in an annular shape around the entire upper peripheral area of the sliding portion and filled with grease for lubrication and sealing ,
“The grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The first and second waterproof grease filling portions are provided in a two-layer structure via an annular protective cover ”, and the first and second waterproof grease filling portions are integrally and continuously waterproofed. When the grease filling portion is configured, a grease reservoir portion, a covering ring, a waterproof grease filling portion, a protective cover, a waterproof grease filling portion, and a protective cover are laminated in this order on the upper end portion of the sliding portion.

The gas plug of the invention according to claim 3 is the gas plug described in claim 2 , wherein “the grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The first and second waterproof grease filling portions are provided independently of each other and are separately covered by the first and second protective covers,
The covering ring and the first and second protective covers are integrally formed of an elastic material ”, and outward from the upper surface of the covering ring provided to cover the upper end of the sliding portion. The first and second waterproof grease are filled in both the inside and outside of the grease reservoir by causing the portion extended toward the inside and the portion extended inward of the covering ring to function as first and second protective covers, respectively. Each part can be provided.

  According to the first aspect of the present invention, the grease reservoir can be reliably maintained in a sealed state by the waterproof grease filled in the first and second waterproof grease filling portions, and therefore, by changes in the environment such as temperature and humidity. The base oil component of the grease for lubrication / sealing in the grease reservoir does not evaporate. Further, even if water droplets, detergent, or the like enters the gas plug body from the outside of the gas plug, it does not reach the grease for lubrication and sealing. Therefore, the lubricity, sealing property, and rust prevention of the sliding portion between the shell and the shell housing portion are ensured, and the durability of the gas stopper is improved.

  Further, since the first and second waterproof grease filling portions are covered with the protective cover, it is possible to prevent the inadvertent inflow of the waterproof grease from the waterproof grease filling portion. Therefore, it is economical without filling the waterproof grease more than necessary.

In addition, the entire upper area of the grease reservoir can be reliably covered with a protective cover, and the protective cover is pressed against the upper surface of the thread by the urging force of the presser spring. The sealability of the grease reservoir can be more reliably maintained without the protective cover being displaced. Thereby, the waterproofing / rustproofing effect of the sliding portion is further ensured.

According to the invention of claim 2 , by providing the first and second waterproof grease filling portions in two layers via the protective cover, it is possible to more reliably maintain the sealing property of the grease reservoir, Rust prevention effect is improved.

According to the third aspect of the invention, the same effects as those described above can be expected, and the covering ring and the protective cover can be easily manufactured, and the gas plug body can be easily mounted.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an overall cross-sectional view of the gas plug in a fully opened state according to the first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part thereof.

  The gas plug main body (31) of this embodiment is similar to the conventional one in that the gas stopper body (30) opens upward and receives the inverted frustoconical shape (3) and the upper open end thereof. The cylinder housing part (30) communicates with the gas flow path (31a) of the gas plug body (31) and is connected to the cylinder (3). The gas passage hole (3a) penetrates the gas passage (31a).

  Further, in the center of the upper surface of the thread (3), the operation handle (35) is fitted into a rectangular recess (34) provided on the back surface of the operation handle (35) to be rotatably mounted on the cylinder portion (33). ) Is mounted to prevent relative rotation, and the thread (3) is placed around the base end of the shaft (32) in the thread housing section (30). A spring receiving annular groove (36) is formed to receive a presser spring (4) for receiving the pressed spring. Further, an inner peripheral wall (37) of the gas plug main body (31) is formed following the upper open end of the thread accommodating portion (30).

  The inner peripheral surface of the thread accommodating part (30) and the outer peripheral surface of the thread (3) in both the upper and lower areas of the gas passage hole (3a) are slidable sliding parts (22a) (22b), Lubricating and sealing grease (2) is applied to the upper area of the upper sliding portion (22a).

  The grease (2) for lubrication and sealing is provided in the range from the inner peripheral wall (37) of the gas plug body (31) to the upper surface of the spiral (3), centering on the upper area of the sliding part (22a). The entire coating area is covered with an annular cover plate (1) made of an elastic material such as synthetic rubber.

  As shown in FIG. 2, the covering plate (1) covers the entire range from the inner peripheral wall (37) to the spring receiving annular groove (36) of the spiral (3), and has two in the center of the lower surface. The annular ribs (1a) and (1b) are projected. The outer peripheral edge of the cover plate (1) and the tip of the outer annular rib (1a) are brought into close contact with the inner peripheral wall (37) of the gas plug main body (31), and the tip of the inner annular rib (1b) is connected to the screw (3). Adhering to the upper surface, the inner peripheral edge of the cover plate (1) is in close contact with the annular groove (36) for receiving the spring, leading from the inner peripheral wall (37) of the gas plug body (31) to the upper surface of the spiral (3) The range is divided into three spaces.

Of these, the space surrounded by the annular ribs (1a) and (1b) so as to cover the upper area of the sliding portion (22a) is filled with grease (2) for lubrication and sealing, and the grease reservoir (10 ). A space that opens toward the inner peripheral wall (37) in a range from the annular rib (1a) to the outer peripheral end of the covering plate (1) is a first waterproof grease filling portion (filled with waterproof grease (20)). It functions as 13a). Similarly, in the range from the annular rib (1b) to the inner peripheral edge of the cover plate (1), the space that opens toward the upper surface of the thread (3) is the second waterproof that is also filled with waterproof grease (20). It functions as a grease filling part (13b).
The portion of the covering plate (1) that covers the grease (2) for lubrication and sealing corresponds to the covering ring (11) specified in the present invention, and is provided continuously with the covering ring (11). The portion constituting the first waterproof grease filling portion (13a) is the first protective cover (12a), and the portion constituting the second waterproof grease filling portion (13b) is the second protective cover. Corresponds to the cover (12b).

  The grease reservoir (10) filled with grease for lubrication and sealing (2) is provided on the entire circumference of the upper end of the sliding part (22a) between the thread (3) and the thread accommodating part (30). Rotating operation of the thread (3) can be performed smoothly, and the sealing performance at the sliding portion (22a) is ensured. In addition, the grease (2) gradually flows down over time, but the grease (2) is replenished from the grease reservoir (10) to the sliding parts (22a) (22b) according to the amount of flow. ) Need not be replenished frequently.

  Further, the grease reservoir (10) is covered with a covering ring (11) portion of the covering plate (1), and a first waterproof grease filling portion (13a) is provided above the grease retaining portion (10). 20) is filled so as to be in contact with the inner peripheral wall (37) of the gas plug main body (31), the grease reservoir (10) is closed in an airtight state on the inner peripheral wall (37) side. In addition, a second waterproof grease filling part (13b) is provided on the upper surface side of the thread (3) of the grease reservoir (10), and the waterproof grease (20) is filled so as to contact the upper surface of the thread (3). Therefore, the grease reservoir (10) is also closed in an airtight state by the waterproof grease (20) on the upper surface side of the thread (3).

  As a result, the grease reservoir (10) is completely blocked from the internal space (38) surrounded by the gas plug main body (31) and the operation handle (35) leading to the outside of the gas plug, and is sealed. Maintained. This prevents the base oil component of the grease for lubrication and sealing (2) from evaporating due to changes in temperature and humidity, and reliably prevents water droplets and detergent from entering the sliding parts (22a) and (22b). can do.

  Further, the grease for lubrication and sealing (2) and the waterproof grease (20) are accommodated in the grease reservoir (10) and the first and second waterproof grease filling portions (13a) and (13b). Lubrication / sealing grease (2) and waterproof grease (20) do not inadvertently flow out to other places, and there is no waste.

What is shown in FIG. 3 is a principal part expanded sectional view of the gas stopper of 2nd Embodiment.
This cover covers the cover plate (1) from the inner peripheral wall (37) of the gas plug body (31) through the upper surface of the thread (3) and the annular groove (36) to the operating shaft (32). A covering ring (11) that covers the range from the upper end of the sliding part (22a) to the upper surface of the thread (3) and further to the annular groove (36) for the spring receiving, and the covering ring (11) And a second protective cover (12b) that is connected to the inside of the covering ring (11) and covers the operating shaft (32). . The space enclosed by the covering ring (11), the top surface of the thread (3) and a part of the inner peripheral wall (37) of the gas plug body (31) becomes the grease reservoir (10), which is used for lubricating and sealing grease. (2) is filled and the first waterproof grease filling portion (13a) covered with the first protective cover (12a) is waterproof so as to be in contact with the inner peripheral wall (37) of the gas plug body (31). In the second waterproof grease filling portion (13b) filled with the grease (20) and covered with the second protective cover (12b), the waterproof grease (20) is brought into contact with the peripheral wall of the operation shaft (32). Filled.
In this embodiment, the grease reservoir (10) and the second waterproof grease filling portion (13b) communicate with each other in the spring receiving annular groove (36), and the grease for lubrication and sealing (2) And the waterproof grease (20) in the second waterproof grease filling part (13b) are in direct contact.

The lower end of the presser spring (4) is accommodated in the spring receiving annular groove (36) in a state where a part of the lubricating / seal grease (2) and the cover plate (1) is pressed by the biasing force. ing.
Even in this embodiment, waterproof grease (20) is provided on both the inner and outer sides of the grease (2) for lubrication and sealing in the grease reservoir (10), and the grease reservoir (10) is airtight. Secured. In particular, since a part of the cover plate (1) is pressed by the presser spring (4), even if the screw (3) is rotated, the inconvenience that the cover plate (1) is displaced can be prevented. 38) It is possible to secure the grease reservoir (10) and the first and second waterproof grease filling portions (13a) and (13b).

FIG. 4 is an enlarged cross-sectional view of the main part of the gas plug according to the third embodiment, in which a covering ring (11) and a protective cover (12) are provided separately. Apply the grease for lubrication and sealing (2) to the area extending from the inner peripheral wall (37) of the gas plug body (31) to the annular groove for spring receiving (36) through the upper surface of the spiral (3) and above it. Is covered with a covering ring (11) to constitute a grease reservoir (10). The protective cover (12) is covered with the upper surface of the covering ring (11) and is attached so as to contact the peripheral wall of the operation shaft (32) of the thread (3). The first waterproof grease filling portion (13a) is provided on the (37) side, and the second waterproof grease filling portion (13b) is provided on the base end side of the operation shaft (32) of the thread (3). ). The presser spring (4) is accommodated in the spring receiving annular groove (36) while pressing the vicinity of the inner ends of the protective cover (12) and the covering ring (11).
In this case, both the covering ring (11) and the protective cover (12) may be formed in an annular sheet shape, and can be formed of different materials.

  FIG. 5 is an enlarged cross-sectional view of the main part of the gas stopper according to the fourth embodiment. In this embodiment, the covering ring (11) and the protective cover (12) are provided separately. The covering ring (11) is mounted so as to cover the grease reservoir (10) provided on the upper surface of the spiral (3) from the inner peripheral wall (37) of the gas plug body (31), and further, the covering ring (11) The waterproof grease (20) is applied to the entire surface side of the cover, and the protective cover (12) is covered from above. That is, in this embodiment, the first and second waterproof grease filling portions (13a) and (13b) of the above-described embodiments are integrally continuous to constitute one waterproof grease filling portion (13). .

  In this case, the grease for lubrication and sealing (2) in the grease reservoir (10) is located above the entire filling region including the inner peripheral wall (37) side and the threaded side (3) side of the gas plug body (31). By applying the waterproof grease (20), it is possible to reliably prevent evaporation of the base oil component of the grease for lubrication and sealing (2), and to seal the sliding part (22) and gas Rust prevention in the plug body (31) is further ensured.

  Further, as in the fifth embodiment shown in FIG. 6, the grease for lubrication / sealing (2) is applied so as to cover the upper end of the sliding portion (22a), and the grease for lubrication / sealing (2) is applied. A covering ring (11) is provided so as to cover, and further, a waterproof grease (20) is applied to the entire surface of the covering ring (11), and a first protective cover (12a) is coated thereon to provide a first protection. A waterproof grease (20) is further applied to the surface of the cover (12a), and the second protective cover (12b) is covered thereon.

  That is, in this embodiment, two layers are formed from one covering ring (11) and two first and second protective covers (12a) and (12b) above the grease reservoir (10). The first and second waterproof grease filling portions (13a) and (13b) were laminated. The upper second protective cover (12b) is configured so as to cover the peripheral wall of the operation shaft (32) of the thread (3), and the spring receiving annular groove (36) by the urging force of the presser spring (4). ).

By making the first and second waterproof grease filling portions (13a) and (13b) into a two-layer structure, the air tightness of the grease reservoir portion (10) is further secured, and the sliding portion (22a) is waterproofed. In addition to a more reliable antirust effect, it is possible to reliably prevent evaporation of the base oil component of the grease for lubrication and sealing (2).
In each of the above embodiments, the first and second waterproof grease filling portions (13a) and (13b) may be configured to be filled with packing that has absorbed the waterproof grease.

1 is an overall cross-sectional view of a gas stopper according to a first embodiment of the present invention. The principal part expanded sectional view of FIG. The principal part expanded sectional view of the gas stopper of 2nd embodiment of this invention. The principal part expanded sectional view of the gas stopper of 3rd Embodiment of this invention. The principal part expanded sectional view of the gas stopper of 4th Embodiment of this invention. The principal part expanded sectional view of the gas stopper of 5th Embodiment of this invention. The whole sectional view of the conventional gas stopper.

Explanation of symbols

(10) ... Grease reservoir
(11) ... Coated ring
(12a) (12b) ... Protective cover
(13a) (13b)... First and second waterproof grease filling portions
(2) ・ ・ ・ ・ ・ ・ ・ Lubrication and sealing grease
(20) ... Waterproof grease
(22) ... Sliding part
(3) ...
(30) ...
(31) ... Gas plug body
(37) ... ・ Inner wall

Claims (3)

A thread that opens and closes the gas flow path is rotatably accommodated through a sliding part in a thread accommodating part that opens to one side of the gas plug body and communicates with the gas flow path. A grease reservoir portion filled with grease for lubrication and sealing is provided in an annular shape around the entire circumference, and an operation shaft is provided at the center of the upper surface of the thread so as to be connected to the operation handle in a state of preventing relative rotation. And a gas stopper provided with a presser spring interposed in a compressed state between the upper surface of the thread and the operation handle along the operation axis .
The grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The first and second waterproof grease filling portions are entirely covered with an annular protective cover ,
The protective cover is configured to cover a range from the inner peripheral wall of the gas plug main body to the operation shaft through the upper surface of the spiral,
The gas stopper according to claim 1, wherein the presser spring is set so as to press the upper surface of the thread through the protective cover . A thread that opens and closes the gas flow path is rotatably accommodated through a sliding part in a thread accommodating part that opens to one side of the gas plug body and communicates with the gas flow path. In a gas stopper in which a grease reservoir portion filled with grease for lubrication and sealing is provided in an annular shape around the entire circumference ,
The grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The gas stopper according to claim 1, wherein the first and second waterproof grease filling portions are provided in a two-layer structure through an annular protective cover . A thread that opens and closes the gas flow path is rotatably accommodated through a sliding part in a thread accommodating part that opens to one side of the gas plug body and communicates with the gas flow path. In a gas stopper in which a grease reservoir portion filled with grease for lubrication and sealing is provided in an annular shape around the entire circumference ,
The grease reservoir is covered with an annular covering ring,
On the outer peripheral side of the covering ring, a first waterproof grease filling portion is provided that can be filled with waterproof grease so as to be in contact with the inner peripheral wall of the gas stopper main body following the open end of the thread housing portion,
A second waterproof grease filling portion capable of being filled with waterproof grease so as to be in contact with the upper surface of the thread on the inner peripheral side of the covering ring;
The first and second waterproof grease filling portions are provided independently of each other and are separately covered by the first and second protective covers,
The gas stopper according to claim 1, wherein the covering ring and the first and second protective covers are integrally formed of an elastic material .

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