JP2007303538A - Gas cock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cock allowing a user to confirm mounting and screwed-in conditions of a plug easily. <P>SOLUTION: This gas cock is constituted in such a way that a ball-shaped valve element 34 for communicating a flow-in passage 31a with a flow-out passage 31b is rotatably provided in a valve casing 31 having the flow-in passage 31a and the flow-out passage 31b, a pair of ball seats 32 for sealing the ball-shaped valve element 34 rotatably are provided between the flow-in passage 31a and the flow-out passage 31b, a hole part 42 communicating with a cavity part C between an outer peripheral face of the ball-shaped valve element 34 and an inner peripheral face of the valve casing 31 is provided in a protrudedly provided part 41 formed in the valve casing 31, the plug 43 for blocking the hole part 42 is mounted in the hole part 42, a distinguishing part 44 is formed at the outer periphery of the plug 43, and an inspection window 41a allowing the user to confirm the distinguishing part 44 of the plug 43 visually is formed in the protrudedly provided part 41 to facilitate confirmation of the mounting condition of the plug 43. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gas plug having a vent hole in a gas pipe and a connection hole for gas pressure inspection, and more particularly to a gas plug directly connected to a stationary combustion appliance such as a kitchen stove or a hot water heater.

  Conventionally, as shown in FIG. 11, this type of gas plug 1 is directly connected to a stationary combustion appliance such as a kitchen stove or a hot water heater. As an attached state, in the case of use in the system kitchen 20, it is attached inside the door-type cabinet 21 and directly connected to the gas stove 22 incorporated in the upper part of the cabinet 21.

  The gas stopper 1 will be described with reference to FIGS. In FIG. 12, 2 is a valve box, 3 is a ball-shaped valve body, 4 and 5 are a pair of ring-shaped valve seats, 6 is a stem shaft, 7 is a handle, and 8 is a plug. The valve box 2 is connected to a rotatable joint 9 via a split ring 9a.

An inflow path 2 a is formed in the valve box 2 in the axial direction with respect to the stem shaft 6, and an outflow path 2 b is formed in a direction perpendicular thereto. A pair of valve seats 4 and 5 are provided in the valve box 2. A ball-shaped valve body 3 is attached through the gap. The ball-shaped valve body 3 is also formed with L-shaped flow paths 3a and 3b in an axial direction with respect to the stem shaft 6 and a direction perpendicular thereto.
Further, a cut surface 3c is formed by cutting the spherical surface on the back side of the flow path 3b formed in a direction perpendicular to the stem axis 6 of the ball-shaped valve body 3 into a flat shape. 14, when the valve 1 is at an intermediate position between the fully open state and the fully closed state, a cut-out surface 3 c forms a clearance C between the portion of the valve seat 5 facing the cut surface 3 c. It is like that.

  As shown in FIGS. 12 and 13, when the ball-shaped valve body 3 is in the fully opened position of the valve 1, a plug is connected to the outside of the valve box 2 where the cut surface 3 c of the ball-shaped valve body 3 faces. An opening 2c formed by detaching 8 is formed, and a plug 8 sealed with an O-ring 10 is screwed into the opening 2c. That is, by attaching the plug 8 to the opening 2c, the opening 2c is sealed to prevent gas leakage.

Next, the operation of the gas stopper 1 will be described.
First, in this angle-type ball valve 1 having a pair of valve seats 4 and 5, a so-called body cavity 2d between the valve seats 4 and 5 always communicates with the inflow passage 2a. When the outside of the valve seat 5 is in the fully open state as shown in FIGS. 12 and 13, the outside of the other valve seat 5 communicates with the opening 2c. And when it is in the fully closed state as shown in FIG. 15, it will be in the state isolated from the gas flow paths 2a, 2b, 3a, and 3b completely.

  For this reason, in the fully open and fully closed states that are always possible, even if the opening 2c is opened, the internal gas does not leak to the outside. Further, in order to make the gas flow path communicate with the opening 2c for air venting, leakage inspection, gas pressure inspection, etc., the ball-shaped valve body 3 is set to an intermediate opening as shown in FIG. What is necessary is just to produce a clearance gap between the cut surface 3c of the shape valve body 3, and the part of the valve seat 5 which faces this.

Further, since the valve seats 4 and 5 are usually made of an elastic body such as rubber or a synthetic resin having elasticity such as PTFE, the main body and the valve body (plug body) in contact with the metal surface like a gas cock. There is no risk of leaking from between. As shown in FIGS. 12 to 15, when the plug 8 is sealed with the O-ring 10, gas leakage during the opening / closing operation is prevented. Such a conventional technique is disclosed in Patent Document 1 shown below.
Japanese Patent Application Laid-Open No. 07-301348

  The conventional gas stopper 1 is attached to a narrow space such as the inside of the cabinet 21, and the plug 8 is attached to the lower part of the valve box 2. For this reason, when the gas plug 1 is connected to the pipe, it is difficult to confirm whether the plug 8 is attached or not and whether it is screwed.

  Forgetting to attach the plug 8 or insufficient screwing causes gas leakage, and this gas leakage occurs when the gas stopper 1 is in a half-open state. That is, if the handle 7 is inadvertently rotated to the intermediate position and the gas stopper 1 is in a half-open state, gas leakage is induced.

  The technical problem of the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gas stopper capable of easily confirming the mounting and screwing state of the plug.

  In order to achieve the object, an invention according to claim 1 includes a valve box having an inflow path and an outflow path, and a ball valve that is rotatably provided in the valve box and communicates with the inflow path and the outflow path. And a pair of ball seats that rotatably seals the ball-shaped valve body between the inflow path and the outflow path, and the projecting portion formed in the valve box includes the ball-shaped valve. In the gas stopper in which a hole communicating with the cavity between the outer peripheral surface of the body and the inner peripheral surface of the valve box is formed, and the plug for closing the plug is installed in the hole, the outer periphery of the plug And a confirmation window for visually recognizing the identification part of the plug is formed on the projecting part.

  The invention according to claim 2 is the invention according to claim 1, wherein the confirmation window is a notch groove or a notch hole formed in the projecting portion.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the projecting portion is a protruding portion protruding from the outer peripheral surface of the valve box or a thick portion formed on the outer peripheral surface of the valve box. It is characterized by being.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the identification unit applies various colors or the like to the upper outer peripheral surface of the plug, or the identification unit for fastening completion or incomplete It is characterized by being a tightening identification part.

  The invention according to claim 5 is characterized in that, in the invention according to claim 1, the length of the O-ring sealable surface of the plug is longer than the length of the joining screw portion of the plug.

  The invention according to claim 6 is the invention according to claim 1, wherein the valve box is formed in an angle shape to form an angle-shaped gas stopper, or the valve box is formed in a straight shape to form a straight-type gas stopper. It is characterized by that.

  According to the first aspect of the present invention, since the confirmation window for visually recognizing the identification part of the plug is formed, the lack of screwing of the plug is easily confirmed by visually recognizing the identification part of the plug from the confirmation window. In addition, it is possible to confirm the presence / absence of the plug and the drop-off from the confirmation window, thereby preventing gas leakage.

  According to the invention according to claim 2, since the confirmation window is a groove or a hole in which the protruding portion is cut out, the user of the cabinet and the contents in the cabinet come into contact with the protruding portion and connect to the plug. Direct contact is avoided.

  According to the invention which concerns on Claim 3, since a protrusion part is formed in the protrusion part or thick part of a valve box, the protrusion part to which a plug is reliably mounted | worn is obtained by simple process.

  According to the invention of claim 4, since the identification portion gives various colors or the like to the upper outer peripheral surface of the plug to be a tightening identification portion or an incomplete tightening identification portion, Confirmation is confirmed more reliably and easily.

  According to the invention of claim 5, since the length of the O-ring sealable surface of the plug is longer than the length of the joining screw portion of the plug, even if the plug is insufficiently screwed, the sealing performance of the hole portion is improved. It is ensured and gas leakage can be suppressed.

  According to the invention which concerns on Claim 6, the highly versatile gas stopper applied to an angle type or a straight type is obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing a gas stopper according to an embodiment of the present invention when fully opened, and FIG. 2 is a longitudinal sectional view showing a fully closed state rotated 90 ° clockwise from the fully opened state of FIG. FIG.

  The gas plug 30 shown in FIGS. 1 and 2 is attached to, for example, a cabinet 21 disposed at the lower portion of the gas stove 22 and has a valve box 31 formed in an angle shape (see FIG. 11).

  In the valve box 31, there are formed an inflow path 31a through which gas flows in and an outflow path 31b through which gas flows out to the gas stove 22 disposed at an upper side and intersecting with the gas path. A ball-shaped valve body 34 that communicates the inflow path 31a and the outflow path 31b is rotatably provided at a position where the inflow path 31a and the outflow path 31b intersect with each other, and between the inflow path 31a and the outflow path 31b. A pair of ball seats 32 for rotatably sealing the ball-shaped valve body 34 are mounted on the upstream side and the downstream side of the ball-shaped valve body 34, respectively.

The valve box 31 is provided with a rotary shaft 35 rotatably on the axis of the inflow passage 31a. One end of the rotary shaft 35 is fixed to a ball-shaped valve body 34, and the other end is connected to a connector. A handle 39 is connected via 33.
A pair of O-rings 36 are attached to the cylindrical portion on one end side of the rotating shaft 35, and the handle 39 is rotated while ensuring the airtightness in the valve box 31.
A double-sided convex portion 35a is formed at the other end portion of the rotating shaft 35, and a double-sided concave portion 33a formed at one end portion of the connector 33 is fitted into the double-sided convex portion 35a, thereby providing a connector. 33 is movable in the axial direction of the rotation shaft 35 and is rotatable with the rotation shaft 35.

  The handle 39 is fixed to the connector 33 by a screw 40, and the connector 33 is disposed in the valve box 31 by a substantially annular stopper 61 fixed to the mounting portion 31c of the valve box 31. The stopper 61 is restricted from rotating in the circumferential direction with respect to the attachment portion 31c by an engaging portion (not shown), and is restricted from moving in the axial direction by the step portion 31e and the retaining ring 62 of the attachment portion 31c. Yes.

  The connector 33 is urged toward the handle 39 by the coil spring 38, and the connector double-side convex portion 33b provided at the handle-side end of the connector 33 is fitted into the stopper double-side concave portion 61a formed on the inner diameter of the stopper 61. As a result, the rotational position of the handle 39 is locked.

  When the gas plug 30 is in the fully opened state of FIG. 1, the handle 39 is pressed against the elastic force of the coil spring 38, so that the connector double-surface convex portion 33b and the stopper double-surface concave portion 61a are fitted. Is released, and the handle 39 is unlocked. Then, the ball-shaped valve element 34 is rotated via the connector 33 and the rotation shaft 35 by rotating with the handle 39 pressed. A step portion (not shown) is formed on the base outer periphery 33 c of the connector 33, and this step portion is brought into contact with a protrusion (not shown) formed on the inner periphery of the attachment portion 31 c of the valve box 31. The handle 39 is formed in the fully open position. The handle lock structure in the fully closed position as described above is also disclosed in Japanese Utility Model Laid-Open No. 64-46587.

  The handle 39 has a cup shape made of a polycarbonate material, and its opening is positioned so as to cover the mounting portion 31c of the valve box 31. In the opening of the handle 39, a pair of slits 39a extending in the axial direction and reaching the opening end are formed at a slight interval, and a tongue piece 39b is formed to facilitate radial elastic displacement. . And the hemispherical projection part 39c is formed in the inner surface of this tongue piece 39b (refer FIG. 3).

  In addition, in the mounting portion 31c, a recess 31d that substantially matches the shape of the protrusion 39c is formed at a position corresponding to the protrusion 39c, and the protrusion 39c is locked to the recess 31d, so that the handle 39 The fully opened position is temporarily fixed, and the unintentional rotation of the handle 39 is prevented (see FIG. 4).

When the gas stopper 30 is fully opened as shown in FIG. 2, by rotating the handle 39 without pressing, the protrusion 39c of the handle 39 rides on the peripheral edge of the recess 31d of the valve box 31, and the tongue piece 39b The temporary fixing is released by elastic displacement in the radial direction.
Accordingly, the holding force of the handle 39 in the fully closed state is set with a large holding force that needs to be released by pressing the handle 39, and when the fitting is released, a large click feeling is obtained when the handle 39 is operated. On the other hand, the holding force of the handle 39 in the fully opened state is set with a small holding force that is released only by the rotation of the handle 39. A sense is obtained.

In this way, by holding the ball-shaped valve body 34 in both the fully open and fully closed positions, the ball-shaped valve body 34 is prevented from being unintentionally rotated to the intermediate opening position, and the click in both of these positions is performed. It is possible to prevent the sensor from being left in the middle opening position by mistake during operation.
Further, since the holding force at the fully opened position is set relatively small compared to the holding force at the fully closed position, the handle 39 is fully opened from the fully opened state based on the necessity of urgently shutting off the gas. The rotation operation can be smoothly performed without the need to press the handle 39.

  A projecting portion 41 is formed at the lower portion of the valve box 31 on the axis of the outflow passage 31b. The projecting portion 41 includes an outer peripheral surface of the ball-shaped valve body 34 and an inner peripheral surface of the valve box 31. A hole 42 communicating with the cavity C between the two is formed. The protruding portion 41 is formed by a protruding portion or a thick portion of the valve box 31.

  The hole 42 includes a small-diameter portion 42a and a large-diameter portion 42b whose inner periphery is threaded. A plug 43 is screwed into the hole 42 to air-tightly close the hole 42, and the cavity 42 Gas leakage from the part C to the outside of the projecting part 41 is prevented.

  Such a plug 43 has a small-diameter portion 43a and a large-diameter portion 43b that are substantially aligned with the small-diameter portion 42a and the large-diameter portion 42b of the hole portion 42, respectively, and an O-ring 45 is attached to the tip of the small-diameter portion 43a. The outer diameter of the large diameter portion 43b is threaded, and the length l of the small diameter portion 43a is longer than at least the screwing length X between the large diameter portion 42b of the hole portion 42 and the large diameter portion 43b of the plug 43. In this embodiment, the length l of the small diameter portion 43a is set to be longer than the screw portion length L of the large diameter portion 43b equal to the screwing length X, and almost the entire length of the small diameter portion 42a can be sealed. (See FIG. 5B). The O-ring 45 may be attached to the small diameter portion 42a of the hole portion 42.

  An identification part 44 adjacent to the tip part 43c is formed on the outer periphery of the large-diameter part 43b of the plug 43, and the tip part 43c and the identification part 44 of the plug 43 are visually recognized at the opening end part of the projecting part 41. A confirmation window 41a is formed. Such a confirmation window 41a is a groove or hole formed by cutting out the opening end portion of the projecting portion 41 or a combination thereof. The confirmation window 41a in the present embodiment is a groove formed so as to be confirmed from the handle 39 side.

  When the plug 43 is normally mounted in the hole 42, as shown in FIGS. 5A and 5B, the plug 43 is completely screwed into the hole 42. The tip 43c of the plug 43 is visually recognized from the confirmation window 41a, and it is easily confirmed that the plug 43 is normally attached.

  Next, there is a risk that the screw of the plug 43 may be loosened when the screwing of the plug 43 is insufficient, or in the unlikely event that vibration is caused by repeated use of the cabinet 21 or the contents are contacted. When the removal starts from 42, the identification part 44 of the plug 43 is visually recognized from the confirmation window 41a, and the looseness of the plug 43 is confirmed (see FIGS. 6A and 6B).

  Next, as shown in FIGS. 7A and 7B and FIGS. 8A and 8B, the length of the small-diameter portion 43a is increased even when the plug 43 is sequentially removed, as shown in FIGS. Since l is set longer than the length L of the large-diameter portion 43b, the sealing performance of the hole portion 42 is ensured and gas leakage can be suppressed.

  When the plug 43 is not attached to the hole 42, as shown in FIGS. 9A and 9B, the plug 43 is not visually recognized from the confirmation window 41a, and the attachment of the plug 43 is easily confirmed.

  As described above, in this embodiment, the identification portion 44 is formed in the vicinity of the distal end portion 43c of the plug 43, and the confirmation window 41a for visually recognizing the identification portion 44 is formed at the opening end portion of the protruding portion 41. The identification part 44 of 43 is easily visually recognized from the confirmation window 41a, and the looseness (tightening state) of the plug 43 is confirmed. In addition, the presence or absence of the plug 43 and the falling state are confirmed from the confirmation window 41a, and gas leakage can be prevented in advance.

  Moreover, since the confirmation window 41a is a groove or a hole formed by cutting out the protruding portion 41, the user of the cabinet 21 and the contents in the cabinet 21 come into contact with the end portion of the protruding portion 41, Direct contact with the plug 43 is avoided as much as possible, and loosening of the plug 43 is suppressed.

  Further, since the protruding portion 41 is formed by the protruding portion or the thick portion of the valve box 31, the protruding portion 41 can be obtained by simple processing, and the plug 43 is securely mounted with a margin.

Next, another embodiment that further suppresses the loosening of the plug 43 will be described.
Inside the cabinet 21 of the system kitchen 20, containers such as cooking utensils such as pots and frying pans and seasoning bottles are stored. As an example, many frying pans having a diameter of about 20 to 30 cm are commercially available, and the handle has a diameter of about 25 to 30 mm.

  By disposing the end surface of the tip end portion 43c of the plug 43 in a so-called concave shape located inward of the end surface of the opening end portion 41b of the projecting portion 41, the handle of the cooking utensil is placed inward of the cabinet 21. Even if it contacts the abutting portion 41 of the gas stopper disposed above, the phenomenon of reaching the end face of the plug 43 can be prevented, and loosening of the plug 43 due to this can be suppressed.

  The recess dimension t (the dimension from the end surface of the tip end portion 43c of the plug 43 to the end surface of the opening end portion 41b of the projecting portion 41) is set to t = about 0.5 mm in the case of a plug thread nominal M9. Can prevent the handle of a cooking utensil having a diameter of about 30 mm from reaching the end face of the plug, and setting t = about 1.0 mm can prevent the cooking utensil having a diameter of about 15 mm from reaching. it can. If t is set to be larger than about 2.0 mm, it becomes difficult to integrally form the confirmation window 41a when the projecting portion 41 is forged. Therefore, 0.5 to 2.0 mm is preferable, and 1.0 It is optimal to set it to ~ 2.0 mm.

  Further, since the length of the O-ring sealable surface of the plug 43 is formed longer than the length of the threaded portion of the plug 43, even if the plug 43 is loosened and the removal thereof proceeds, at least the plug 43 and the large-diameter portion 42b. If there are one or more threads, the sealing performance of the hole 42 is ensured, and gas leakage is suppressed.

  The embodiment of the present invention has been described in detail above, but the present invention is not limited to the above-described embodiment, and the scope does not depart from the spirit of the invention described in the claims of the present invention. Thus, various changes can be made.

  For example, the identification portion 44 is provided with an identification portion for incomplete tightening of the plug 43 and an identification portion for completion of tightening, and in a position that can be visually recognized from the confirmation window 41a at the incomplete tightening position (gas leakage risk position). And a blue display may be written at a position that can be viewed from the confirmation window 41a at the tightening completion position (safety position).

  Furthermore, the identification part 44 is good also as a fluorescent display so that it can visually recognize also in the dark cabinet 21. FIG. As a result, clearer attention is given, and confirmation of the plug attachment state is more reliable and easy.

  The valve box 31 can be formed into a straight shape to form a straight type gas stopper, which can be applied to an angle shape or a straight shape, and versatility can be improved.

  As shown in FIG. 10, a recess 50a is formed at the opening end of the handle 50, a resin ring 51 is mounted on the mounting portion 31c of the valve box 31, a protrusion 51a is formed on the resin ring 51, and the recess 50a is protruded. By engaging with the portion 51a, the position of the gas stopper 31 when fully opened may be temporarily fixed to prevent unintentional rotation of the handle 50. In this case, a protrusion may be formed on the handle 50 and a recess may be formed on the resin ring 51. In the figure, 31f is a convex portion provided on the upper surface of the mounting portion 31c of the valve box 31, and the resin ring 51 is rotated by engaging the convex portion 31f with the concave portion 51b on the lower surface of the resin ring 51. It is preventing.

  In addition, a ball plunger is fixed to the end of the plug 43, and the ball plunger ball is pressed against the recess formed in the ball-shaped valve body 34 to prevent unintentional rotation of the ball-shaped valve body 34. It may be.

It is a longitudinal cross-sectional view at the time of full opening of the gas stopper which concerns on one embodiment of this invention. It is a longitudinal cross-sectional view at the time of full closure of the gas stopper shown in FIG. It is a bottom view of the handle shown in FIG. It is the B section expanded sectional view of FIG. 1A and 1B show a state in which the plug shown in FIG. 1 is normally attached, in which FIG. 1A is a front view of a gas stopper, and FIG. FIGS. 1A and 1B show a process in which the plug shown in FIG. 1 is pulled out, wherein FIG. 1A is a front view of a projecting portion, and FIG. FIGS. 1A and 1B show a process in which the plug of FIG. 1 is pulled out, wherein FIG. 1A is a front view of a projecting portion, and FIG. FIGS. 1A and 1B show a process in which the plug of FIG. 1 is pulled out, wherein FIG. 1A is a front view of a projecting portion, and FIG. FIGS. 1A and 1B show a state in which the plug shown in FIG. 1 is not mounted, wherein FIG. 1A is a front view of a projecting portion, and FIG. 1B is a sectional view of a hole portion. It is sectional drawing which shows the latching mechanism of the handle shown in FIG. It is a perspective view which shows the attachment state of a gas stopper. It is a longitudinal cross-sectional view of the conventional gas stopper. It is AA sectional drawing of FIG. It is sectional drawing which shows the state of a ball-shaped valve body when a handle | steering-wheel is rotated 45 degrees from the state of FIG. FIG. 15 is a cross-sectional view showing a state of the ball-shaped valve body when the handle is further rotated by 45 ° from the state of FIG. 14 and fully closed.

Explanation of symbols

30 Gas stopper 31 Valve box 31a Inflow path 31b Outflow path 32 Ball seat 34 Ball-shaped valve body 35 Rotating shaft 39 Handle 39a Slit 39b Tongue piece 39c Projection part 41 Projection part 41a Confirmation window 42 Hole part 42a, 43a Small diameter part 42b, 43b Large diameter part 43 Plug 44 Identification part C Cavity part

Claims (6)

Between the valve box having an inflow path and an outflow path, a ball-shaped valve body that is rotatably provided in the valve box and communicates with the inflow path and the outflow path, and the inflow path and the outflow path, A pair of ball seats for sealing the ball-shaped valve body in a rotatable manner, and a projecting portion formed on the valve box between the outer peripheral surface of the ball-shaped valve body and the inner peripheral surface of the valve box. In the gas stopper in which a hole portion communicating with the cavity portion is drilled, and a plug for closing the hole portion is attached to the hole portion,
An identification part is formed on an outer periphery of the plug, and a check window for visually recognizing the identification part of the plug is formed on the projecting part.   The gas stopper according to claim 1, wherein the confirmation window is a notch groove or a notch hole formed in the projecting portion.   3. The gas stopper according to claim 1, wherein the projecting portion is a projecting portion projecting on an outer peripheral surface of the valve box or a thick portion formed on an outer peripheral surface of the valve box.   4. The identification unit according to claim 1, wherein the identification unit for fastening completion or the identification unit for incomplete clamping is formed by applying various colors to the upper outer peripheral surface of the plug. 5. Gas tap.   The gas plug according to claim 1, wherein the length of the O-ring sealable surface of the plug is longer than the length of the joining screw portion of the plug. The gas valve according to claim 1, wherein the valve box is formed in an angle shape to form an angle-shaped gas plug, or the valve box is formed in a straight shape to form a straight-type gas plug.

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