JP2016169753A - Plug cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug cover having a structure in which two semi-cylindrical members are connected to cause their installed states to be kept against a plug and pressing-in of a joint releases the installed states and its installed states can be released with a lower pressing-in force.SOLUTION: A plug cover 10 is installed at a plug 4A under a cylindrical connected state in which a first semi-cylindrical member 30 and a second semi-cylindrical member 50 are connected. This plug cover 10 is arranged in such a way that when it is connected in a cylindrical manner where it is installed at the plug 4A, protrusion segments 58A, 58B formed at a second protruding part 54 are protruded to an inserting port 14A rather than a first protruding part 34. Then, the protrusion segments 58A, 58B are pushed toward an installing part 12 by a joint 102 inserted from the inserting port 14A and claws 56B, 56C cooperated with the protrusion segments 58A, 58B are not engaged with engaged segments 36A, 36B and the cylindrical connected state is released.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a plug cover attached to a plug provided in a gas combustion device such as a gas stove, a gas fan heater, or a gas rice cooker.

  Conventionally, gas combustion equipment has been provided with a plug (gas plug) for mounting a gas cord connected to a gas outlet, and a dedicated joint provided at the tip of the gas cord is connected to this plug. It can be installed. In this type of configuration, a gas flow path that continues inside the gas combustion device is formed on the plug side, and a gas flow path that continues from the gas cord is formed on the joint side. The gas channel on the plug side and the gas channel on the joint side communicate with each other, and gas is supplied from the gas cord side to the inside of the gas combustion device (see Patent Document 1).

  Further, in such a configuration, an introduction portion corresponding to the plug shape is provided in the joint provided at the distal end portion of the gas cord, and a plug and an introduction portion are provided at a required portion of the introduction portion. A seal portion for sealing is provided. Further, the outer peripheral portion of the introduction portion is provided with a slide cylinder portion that slides in the plug direction by a spring when the plug is inserted into the introduction portion, and maintains the state in which the plug and the joint are engaged. An open / close valve is provided inside the joint to open the gas flow path in the joint in conjunction with the slide of the slide cylinder portion in the plug direction. When the joint configured as described above is attached to the gas plug, the gas plug and the joint are joined in a sealed state, and gas leakage is prevented. The engagement state between the gas plug and the joint is released by sliding the slide cylinder toward the joint body, but the on-off valve closes the gas flow path in the joint in conjunction with the slide of the slide cylinder. Is configured to do. Due to such a configuration, even when the gas cord is removed from the plug, gas does not leak from the tip of the gas cord.

JP 2014-118991 A

  By the way, since the plug of the gas combustion device fits if the tip portion has a predetermined inner diameter, for example, connection is forcibly attempted by a gas hose that is not supposed to be connected (a simple gas hose without a joint). There is a fear. When a gas hose without a joint is extrapolated to the plug in this way, it is possible to supply gas from the gas hose into the gas combustion device, but the gas hose and the plug cannot be sealed well, resulting in gas leakage. There is a fear. Therefore, in order to avoid such a problem, some measures are required to make it impossible to directly connect a gas hose without a joint.

  As an example of this countermeasure, for example, a plug cover as in Patent Document 1 has been proposed. In the plug cover of Patent Document 1, a mounting portion to be attached to a plug is formed at a base end portion, and an opening portion serving as a joint insertion port is formed at a distal end portion on the opposite side, and the joint is inserted from the insertion port. Thus, the plug cover can be removed from the plug.

  Specifically, two semi-cylindrical members (connecting members 60a and 60b) configured in a semi-cylindrical shape are connected to each other by a hinge portion 60c, and each semi-cylindrical member (the connecting member 60a) is centered on the hinge portion 60c. 60b) can be opened and closed. A partition wall (isolation wall 85) is formed in the plug cover to divide the internal space on the axial front end side of the plug cover and the internal space on the base end side. In the internal space, an annular member (arc-shaped fitting portion 71) is provided that contacts the plug from the outside and positions the plug at a fixed position. An insertion port for inserting the joint (joint member 20) at the distal end of the gas cord is formed on the distal end side in the axial direction.

  In the configuration of Patent Document 1, the end of the semi-cylindrical member (connecting member 60a) on the side opposite to the hinge 60c is at a position closer to the front end side in the axial direction than the partition wall (isolation wall 85). A connecting piece having a joint hole 62a is formed, and the other semi-cylindrical member (connecting member 60b) is engaged with the engaging hole 62a of the connecting piece at the end opposite to the hinge portion 60c. A claw 61a is formed. In this configuration, the semi-cylindrical members (the connecting members 60a and 60b) swing around the hinge portion 60c, and the end of the semi-cylindrical members (the connecting members 60a and 60b) opposite to the hinge portion 60c. When the parts abut, the entire plug cover is in a cylindrical state. In this state, the engagement of the engagement claw 61a and the engagement hole 62a allows the plug cover to be maintained in a cylindrical state.

  An inclined surface (engagement release portion 86) is formed on the inner peripheral surface of the plug cover as a configuration for releasing. The inclined surface (disengagement part 86) is located on the inner peripheral surface of the plug cover closer to the distal end side in the axial direction than the partition wall (separating wall 85) and on the inner surface of the connecting piece from the distal end side to the proximal end side. As it becomes, it is formed to project inward. This inclined surface (engagement release portion 86) is configured in such a shape that the outer peripheral portion of the joint member 20 abuts when the joint member 20 is inserted into the insertion port. Further, when a gas hose having a diameter smaller than that of the joint member 20 is pushed in, the gas hose is configured not to be strongly fitted between the inclined surface (engagement release portion 86) and the opposing inclined portion 81. .

  When the joint member 20 is inserted from the insertion port, the plug cover configured as described above is configured so that the joint member 20 contacts the inclined surface (engagement release portion 86) and pushes the connecting piece outward. Works. And since a connection state is cancelled | released by this effect | action, a plug cover can be removed from a plug. On the other hand, when the end portion of the gas hose without a joint is inserted, the gas hose does not act so as to strongly press the inclined surface (engagement release portion 86), so the connected state is not released and the plug cover is in the attached state. Maintained. That is, according to this configuration, the purpose of “making it impossible to directly connect a gas hose without a joint” is fulfilled for the time being.

  However, since the configuration of Patent Document 1 has a relationship in which the insertion direction of the joint and the displacement direction of the connecting piece are orthogonal to each other or a relationship close thereto, the problem is that the pushing force of the joint does not easily act on the connecting piece. There is. That is, when releasing the connection, the joint must be pushed in with a considerably strong force so that a sufficient force is applied in the displacement direction of the connecting piece, which greatly increases the work burden on the user.

  The present invention has been made to solve the above-described problem, and provides a configuration in which a pushing force when pushing a joint is easily transmitted to a portion for releasing the connection, and the connection is easily released with a smaller pushing force. The purpose is to do.

The present invention relates to a shaft-like plug that is attached to a gas combustion device having a plug on which a joint provided at a gas cord front end is detachably attached, and that the state of attachment to the plug can be released by the joint. A cover,
A mounting portion that is attached to the plug; and a cylindrical portion that is configured in a cylindrical shape and connected to the mounting portion in the attached state, and the mounting portion is provided on one end side in the axial direction of the cylindrical portion. A bottom portion arranged to cover the plug when in a state is provided, and an insertion port serving as an inlet of the joint in the mounting state is formed on the other axial end side of the cylindrical portion; The part and the cylindrical part are respectively constituted by a pair of semi-cylindrical members in a form in which the plug cover is divided along the axial direction.
The first semi-cylindrical member of the pair of semi-cylindrical members projects inwardly from a first semi-cylindrical portion that forms part of the cylindrical portion and an inner peripheral surface of the first semi-cylindrical portion. A first projecting portion, and the second semi-cylindrical member of the pair of semi-cylindrical members includes a second semi-cylindrical portion forming a part of the cylindrical portion, and the second semi-cylindrical member. A second projecting portion projecting inward from the inner peripheral surface of the tubular portion,
In the cylindrical connection state in which the first semi-cylindrical member and the second semi-cylindrical member are connected, at least a part of the first overhanging part is more than at least a part of the second overhanging part. Also, the bottom portion that is arranged on the insertion port side, the first overhanging portion and the second overhanging portion overlap in the axial direction, and divides the inner space side and the mounting portion side of the cylindrical portion Is configured,
In the second overhanging portion, the wall portion on the inner space side is formed with an engaging portion that can engage with a part of the first overhanging portion, and a protruding portion that protrudes toward the insertion port side,
The first overhanging portion includes an engaged portion that can be engaged with the engaging portion, and the protruding portion protrudes closer to the insertion port than the first overhanging portion in the cylindrical connection state. And a guide part that forms a guide area for
In the cylindrical connection state, the cylindrical connection state is maintained by the engagement of the engaging portion and the engaged portion, and the protruding portion is closer to the insertion port than the first overhanging portion. It will be arranged to protrude,
When the protruding portion is pressed toward the mounting portion by the joint inserted from the insertion port in the cylindrical connection state, the engaging portion interlocked with the protruding portion is the engaged portion. And the cylindrical connection state is released.

According to the present invention, in the cylindrical connection state in which the first semi-cylindrical member and the second semi-cylindrical member are connected, at least a part of the first overhanging part is more than at least a part of the second overhanging part. The first overhanging portion and the second overhanging portion are axially overlapped with each other so that a bottom portion that divides the inner space side of the cylindrical portion from the attachment portion side is formed. It has become. As described above, since the bottom portion is configured to divide the inner space side and the mounting portion side in the cylindrical portion, the bottom portion covering the plug prevents the plug from being mounted unless the cylindrical connection state is released. Become.
More specifically, an engaging portion that can engage with a part of the first overhanging portion and a protruding portion that protrudes toward the insertion port are formed in the wall portion on the inner space side of the second overhanging portion. ing. And in the 1st overhang | projection part, the to-be-engaged part which can be engaged with an engagement part, and a protrusion part are made to project in the insertion port side rather than the said 1st overhang | projection part at the time of a cylindrical connection state The guide part which comprises a guidance area | region is formed. That is, in the cylindrical connection state, the first overhanging portion and the second overhanging portion are overlapped in the axial direction by the engagement between the engaging portion and the engaged portion (that is, the bottom portion is configured). Stable).
And when it is in the cylindrical connected state, the protruding portion formed on the second overhanging portion is arranged to protrude to the insertion port side from the first overhanging portion, and the protruding portion is attached to the mounting portion by the joint inserted from the insertion port. By being pressed to the side, the engaging portion interlocked with the protruding portion is not engaged with the engaged portion, and the cylindrical connection state is released. In this way, since the engagement between the engaging portion and the engaged portion is released by pushing the protruding portion protruding to the insertion port side to the mounting portion side, the normal releasing operation (that is, the normal joint) In the insertion operation), the direction of the force for inserting the joint is the same as or close to the direction in which the force should be applied to release the engagement (the direction in which the protruding portion is displaced toward the mounting portion). Therefore, during the regular release operation, the insertion force of the joint is efficiently transmitted to the protruding portion, and the engagement state between the engagement portion and the engaged portion is released with a smaller insertion force, and thus the cylindrical connection state. Can be released.

FIG. 1 is a schematic cross-sectional view illustrating a gas combustion device with a plug cover to which the plug cover of Example 1 is attached. FIG. 2 is a schematic cross-sectional view schematically showing a cross-section at the position AA in FIG. FIG. 3 is a perspective view schematically illustrating the plug cover of the first embodiment. FIG. 4 is a perspective view illustrating a cross-sectional structure in which the plug cover of the first embodiment is cut at a predetermined position. FIG. 5A is a front view schematically illustrating the plug cover of the first embodiment, and FIG. 5B is a view of the plug cover in a state where the cylindrical connection state is released from the front side. It is a figure. FIG. 6A is a side view schematically illustrating the plug cover of the first embodiment. FIG. 6B is a side view of the plug cover as viewed from the side with the cylindrical connection state released. It is a figure. FIG. 7A is a rear view schematically illustrating the plug cover of the first embodiment, and FIG. 7B is a rear view of the plug cover in a state where the cylindrical connection state is released. It is a figure. FIG. 8 is a perspective view schematically showing the plug cover of Example 1 in which the cylindrical connection state is released. FIG. 9 is a perspective view schematically showing a state in which the plug cover of Example 1 in which the cylindrical connection state is released is viewed from a direction different from FIG. 8. FIG. 10 is a perspective view schematically showing a state in which the plug cover of the first embodiment in which the cylindrical connection state is released is viewed from a direction different from FIGS. 8 and 9. FIG. 11 is a diagram schematically illustrating a state in which the plug cover according to the first embodiment, in which the cylindrical connection state is released, is viewed from a direction different from FIGS. 8, 9, and 10. FIG. 12 is a diagram schematically illustrating a state in which the plug cover according to the first embodiment in which the cylindrical connection state is released is viewed from a direction different from that in FIGS. 8, 9, 10, and 11. FIG. 13 is a schematic cross-sectional view schematically showing a BB cross section of FIG. FIG. 14 is an explanatory diagram conceptually showing a state in which a regular joint is inserted into the plug cover in the gas combustion device with a plug cover of FIG. 1. FIG. 15 is an explanatory diagram conceptually showing a state in which a shaft-like object that is not open is inserted into the plug cover in the gas combustion device with a plug cover in FIG. 1.

The preferable form of this invention is illustrated below.
The plug cover of the present invention includes, in the engaging portion, a trunk portion that extends from the inner peripheral wall side of the second semi-cylindrical portion to the first semi-cylindrical member side, and a claw portion that is formed on the distal end side of the trunk portion, May be provided. In this case, it is desirable that at least the body portion bendable and deformable, and a projecting portion is formed on the body portion.
According to this configuration, when the joint is inserted and the protruding portion is pressed, the pressing force is efficiently transmitted to the trunk portion via the protruding portion, and the trunk portion is easily bent easily. And since the nail | claw part formed in the front-end | tip part is displaced reliably in response to such bending of a trunk | drum, the engagement state of an engaging part and a to-be-engaged part becomes easier to be cancelled | released more favorably. .

  In the plug cover of the present invention, at least two projecting portions may be provided on both sides of the central axis of the cylindrical portion. In this configuration, the force due to the insertion of the joint is easily transmitted to the second projecting portion through the two protruding portions in a balanced manner, and the engaging portion is more easily displaced. Therefore, the engagement state between the engagement portion and the engaged portion can be more reliably released when the joint is inserted.

As for the coupling inserted in the plug cover of this invention, it is desirable that the opening part for supplying gas is formed in the front end surface side. And the plug cover of this invention is good in the 1st overhang | projection part being formed in the wall part by the side of an internal space the regulation part which protrudes in the insertion port side. In this case, the restricting portion is arranged at a position that becomes the center of the bottom portion in the cylindrical connected state, and protrudes so that the protruding amount toward the insertion port side is larger than the protruding portion in the cylindrical connected state. It only has to be. When the joint is inserted from the insertion port and pressed against the bottom side in the cylindrical connection state, the restricting portion is inserted into the opening of the joint, and the protruding portion is pressed by the tip of the joint. It is desirable to have a configuration. Furthermore, when a shaft-like object having no opening at the tip is inserted from the insertion port and pressed against the bottom when in the cylindrical connection state, the restricting portion contacts the tip of the shaft-like object. And it is desirable to have a configuration that restricts the pressing of the protruding portion by the shaft-like object.
In this configuration, when the regular joint is inserted into the plug cover that is in the cylindrically connected state and pressed against the bottom side, the restricting portion is inserted into the opening of the joint, thereby The joint tip will be guided to a position deeper than the tip of the restricting part while causing the centering action to move the cylinder closer to the center position of the cylindrical part. It becomes easy to be pressed. Therefore, the engagement portion and the engaged portion are easily released satisfactorily at the time of a regular release operation using a regular part (a regular joint). On the other hand, when a shaft-like object having no opening at the tip is inserted into a plug cover that is in a cylindrical connection state and pressed against the bottom side, the restricting part comes into contact with the tip of the shaft-like object. In addition, the pressing of the protruding portion by the shaft-like object is restricted. Therefore, in the case of an unauthorized release operation with an unauthorized shaft-like object, it is possible to make it difficult to release the engaged state by suppressing the pressing on the protruding portion, and it is easy to maintain the cylindrical connected state well.

<Example 1>
Embodiment 1 will be described below with reference to the drawings. FIG. 1 shows a gas combustion device 2 with a plug cover in which a plug cover 10 is attached to a gas combustion device main body 4 such as a gas stove, a gas fan heater, or a gas rice cooker. FIG. 1 shows only a part (plug portion) of the gas combustion device 2 with a plug cover, and the gas combustion device main body 4 shows only the gas plug 4A, and other portions are omitted. Yes. In the following description, the gas combustion device 2 with a plug cover is also simply referred to as a gas combustion device 2, and the gas plug 4A is also simply referred to as a plug 4A.

  The plug 4A forming a part of the gas combustion device 2 is a portion to which a joint 102 (FIG. 14) provided at the distal end of the gas cord 100 (FIG. 14) is detachably mounted. In FIG. 14, in the gas cord 100 with the joint 102, the vicinity of the joint 102 is conceptually indicated by a two-dot chain line. As shown in FIG. 1, the plug 4 </ b> A is configured, for example, in an L-shaped pipe shape, and is provided rotatably on the back surface portion and the bottom surface portion of the gas combustion device main body 4. The gas combustion device 2 with a plug cover shown in FIG. 1 has a structure in which a plug cover 10 to be described later is attached to such a plug 4A, and other members (for example, a gas hose without a joint 102) for the plug 4A. Etc.) is prevented.

  The plug cover 10 is made of, for example, a known resin material, and has an overall shape as shown in FIGS. This plug cover 10 has a long axial and cylindrical shape in a predetermined direction (insertion direction of the joint 102 shown in FIG. 14), and is attached to the gas combustion apparatus main body 4 having the plug 4A as shown in FIG. The plug 4A is used so as to cover the front end. The mounting state in which the plug cover 10 is mounted on the plug 4A as shown in FIG. 1 can be released by inserting the joint 102 into the plug cover 10 (see FIG. 14).

  As shown in FIGS. 3 and 4, the plug cover 10 includes a mounting portion 12 attached to the plug 4 </ b> A, a cylindrical portion 14 configured in a cylindrical shape and connected to the mounting portion 12 in the mounted state, The mounting portion 12 and the cylindrical portion 14 are integrally formed of the same resin material, for example. In the present specification, in the plug cover 10, the axial direction of the cylindrical portion 14 (the direction of the cylindrical axis that is the center of the cylindrical portion 14) is the front-rear direction, the insertion port 14A side is the front side, and the opposite side (see FIG. 1 is defined as the rear side.

  As shown in FIG. 1, the mounting portion 12 is a portion that is mounted on the plug 4A, and has a structure that engages with the plug 4A. The mounting portion 12 has a hole 22 (hole formed by arc-shaped portions 22A and 22B) for inserting the tip end of the plug 4A near the end on the other axial side (rear side) of the plug cover 10. A pair of arcuate portions 24A and 24B for sandwiching the distal end portion of the plug 4A are formed closer to one side (front side) in the axial direction than the hole portion 22. One arcuate portion 24A is a portion formed near the rear end of the second semi-cylindrical member 50 described later, and the other arcuate portion 24B is the rear of the first semi-cylindrical member 30 described later. It is a portion formed near the end (see also FIGS. 8 and 9). In the state where the plug cover 10 is attached to the plug 4A as shown in FIG. 1, the arc-shaped portions 24A and 24B are respectively arranged so as to be fitted into the groove portions formed in the circumferential direction of the plug 4A. Since the arc-shaped portions 24A and 24B are sandwiched, the plug 4A is prevented from being detached from the plug cover 10.

  The cylindrical portion 14 is a portion configured in a cylindrical shape on the front side (front side across the bottom portion 20) of the plug 4A as shown in FIG. 1, and serves as an insertion space for inserting the joint 102 as shown in FIG. It is a functional part. The cylindrical portion 14 has a bottom portion 20 formed on one axial end side (rear end side) and an insertion port 14A formed on the other axial end side (front end side). 14A is open. The axial direction of the cylindrical portion 14 is the central axis (cylindrical axis) direction of the inner wall surface of the cylindrical portion 14 configured as a cylindrical surface, and is the same as the axial direction of the entire plug cover 10.

  The bottom portion 20 is a portion that covers the front side of the plug 4A in the mounted state as shown in FIG. 1 (that is, the state in which the plug cover 10 is mounted on the plug 4A). This is a portion that prevents the operation of the plug 4A from the front side when it is maintained. As shown in FIGS. 3, 4, and 5 (A), the insertion opening 14 </ b> A is configured as an opening that forms a circular opening region when viewed from the front. It functions as an inlet for the joint 102 (FIG. 14).

  As shown in FIGS. 5 to 7, the plug cover 10 includes a pair of semi-cylindrical members (first semi-cylindrical member) in a form in which the mounting portion 12 and the cylindrical portion 14 described above are divided along the axial direction. 30, a second semi-cylindrical member 50) is provided. These two semi-cylindrical members (the first semi-cylindrical member 30 and the second semi-cylindrical member 50) are the circumferential end of the first semi-cylindrical member 30 and the second semi-cylindrical member. The circumferential end of 50 is connected by a connecting portion, and the second semi-cylindrical member 50 is displaced relative to the first semi-cylindrical member 30 around the connecting portion (centering on the connecting portion). Turning displacement). 5A, FIG. 6A, and FIG. 7A are connected in a cylindrical shape, and FIG. 5B, FIG. 6B, FIG. 7B, and FIG. -It switches to the state where the cylindrical structure was cancelled | released like FIG. The plug cover 10 is opened inside the mounting portion 12 when the cylindrical structure is released as shown in FIGS. 5 (B), 6 (B), 7 (B), and 8 to 12. At this time, the plug 4A can be incorporated into the mounting portion 12. And if it changes from such a release state and the 2nd semi-cylindrical member 50 displaces relatively with respect to the 1st semi-cylindrical member 30, the convex part 71 formed in the 2nd semi-cylindrical member 50 will be shown. (FIG. 8 etc.) is inserted into the recess 72 formed in the first semi-cylindrical member 30, and the other ends of the second semi-cylindrical member 50 and the first semi-cylindrical member 30 (the connecting portion and Are connected to each other and the engaging portions 56 (claw portions 56B and 56C) are engaged with the engaged portions 36A and 36B as shown in FIG. (Tubular connection state).

  As shown in FIG. 4, FIG. 8, FIG. 9, etc., the first semi-cylindrical member 30 of the pair of semi-cylindrical members includes a first semi-cylindrical portion 32 that forms part of the cylindrical portion 14, A first projecting portion 34 projecting inward from the inner peripheral surface of the first half tube portion 32 is formed. The first half-cylinder part 32 has a semi-cylindrical structure (one structure obtained by dividing the cylinder into two), and the first projecting part 34 is formed so as to project from the inner wall surface of the first half-cylinder part 32. Has been. Also, as shown in FIGS. 4, 8, 9, and the like, the second semi-cylindrical member 50 includes a second semi-cylindrical portion 52 that forms part of the cylindrical portion 14, and a second semi-cylindrical portion 52. A second projecting portion 54 projecting inward from the inner peripheral surface is formed. The second half-cylinder part 52 also has a semi-cylindrical structure (one structure in which the cylinder is divided into two), and the second projecting part 54 is formed so as to project from the inner wall surface of the second half-cylinder part 52. Has been.

  As shown in FIGS. 4 and 8, the second overhanging portion 54 has a plate-like form in which the thickness direction is the front-rear direction, and the inner space side of the cylindrical portion 14 in the second overhanging portion 54. An engaging portion 56 configured as a claw structure and projecting portions 58A and 58B projecting to the insertion port 14A side are formed on the wall 54A facing the (insertion port 14A side). The engaging portion 56 includes a plate-like body portion 56A extending from the inner peripheral wall side of the second half tube portion 52 to the first half tube member 30 side, and a claw portion 56B formed on the distal end side of the body portion 56A. , 56C, and at least the body portion 56A can be bent and deformed. Further, projecting portions 58A and 58B are formed so as to project forward from one surface (front surface) of the body portion 56A configured in a plate shape.

  As shown in FIGS. 4 and 8, the first projecting portion 34 includes engaged portions 36 </ b> A and 36 </ b> B configured as a hole structure and engageable with the engaging portion 56, as shown in FIG. 4. A guide portion 40 that forms a guide region for projecting the protrusions 58A and 58B to the insertion port 14A side of the first overhanging portion 34 in the cylindrical connection state is formed. The first overhanging portion 34 is formed in a plate shape with the front-rear direction being the plate thickness direction, and the engaged portions 36A and 36B are both holes that penetrate the first overhanging portion 34 in the thickness direction. It is configured as a part. As shown in FIGS. 4 and 5, the guide portion 40 is a portion that is notched so that the first overhanging portion 34 does not interfere with the region where the protruding portions 58 </ b> A and 58 </ b> B protrude.

  Further, as shown in FIGS. 4, 5, and 8, the wall 34 </ b> A on the front side (inner space side of the cylindrical portion 14) protrudes toward the insertion port 14 </ b> A (that is, the front side) in the first projecting portion 34. Thus, a regulating portion 38 is formed. The restricting portion 38 is configured as a convex portion protruding forward from the front surface portion of the first projecting portion 34 configured in a plate shape, and is in a cylindrical connected state illustrated in FIGS. 1, 2, 4, and the like. At the center of the bottom 20 at this time, and in this cylindrical connection state, the protrusions 58A and 58B protrude so that the amount of protrusion toward the insertion port 14A is larger (particularly, (See FIG. 2).

Here, the effect of this structure is illustrated.
As shown in FIGS. 1 to 4 and FIG. 5A, in the cylindrical connection state in which the first semi-cylindrical member 30 and the second semi-cylindrical member 50 are connected in a cylindrical shape, as shown in FIG. The first overhanging portion 34 and the second overhanging portion 34 are configured such that at least a part of the first overhanging portion 34 is disposed on the insertion port 14A side (that is, the front side) with respect to at least a portion of the second overhanging portion 54. The bottom portion 20 is configured so that the portion 54 overlaps in the axial direction (front-rear direction) and partitions the inner space side of the cylindrical portion 14 and the mounting portion 12 side. Specifically, the portions of the second projecting portion 54 other than the projections of the claw portions 56B and 56C (projections projecting forward) are disposed on the rear side of the first projecting portion 34, and the first The protruding portion 34 and the second overhanging portion 54 are overlapped with each other in the front-rear direction. In such a cylindrical connection state, the housing space (the space for housing the plug 4A) configured by the mounting portion 12 and the internal space (the space accessible from the outside) configured by the cylindrical portion 14 are the bottom portion. Therefore, as long as the bottom portion 20 is not released (that is, unless the cylindrical connection state is released), the operation from the front side with respect to the plug 4A attached to the attachment portion 12 is prevented.

  And in this structure, in the wall part 54A of the front side (inner space side of the cylindrical part 14) in the 2nd overhang | projection part 54, the engaging part 56 comprised as a claw structure, and the protrusion part which protrudes in the insertion port 14A side 58A and 58B are formed. Further, the first projecting portion 34 is provided with engaged portions 36A and 36B that are configured as a hole structure and engageable with the engaging portion 56, and projecting portions 58A and 58B in the cylindrical connection state. A guide portion 40 that forms a guide region for projecting toward the insertion port 14 </ b> A from the overhang portion 34 is formed. Since it is configured in this manner, the engaging portion 56 and the engaged portions 36A and 36B are engaged with each other, and the first overhanging portion 34 and the second overhanging portion 54 are connected to each other in the cylindrical connection state. It is stably maintained in a state of overlapping in the direction (that is, a state in which the bottom portion 20 is configured). That is, a state in which an unauthorized operation on the plug 4A is suppressed is stably maintained.

  1 to 4 and FIG. 5A, the projecting portions 58A and 58B formed on the second overhanging portion 54 are formed as shown in FIG. Therefore, the protrusions 58A and 58B can be pressed toward the mounting portion 12 by the joint 102 inserted from the insertion port 14A as shown in FIG. When the protrusions 58A and 58B are pushed by the pressing operation (insertion operation) by the joint 102, a force as shown by an arrow F1 in FIG. 13 works, and together with the protrusions 58A and 58B, the engaging part 56 (body part) 56A and the claw portions 56B and 56C) are displaced so as to bend in the direction indicated by the arrow F2. When such an action occurs, the engaging portion 56 (specifically, the claw portions 56B and 56C) interlocked with the protruding portions 58A and 58B is not engaged with the engaged portions 36A and 36B (that is, the claw portion 56B). , 56C are removed from the holes of the engaged portions 36A, 36B), and the cylindrical connection state is released. In this manner, the engagement between the engaging portion 56 and the engaged portions 36A and 36B is released by pushing the protruding portions 58A and 58B protruding toward the insertion port 14A (that is, the front side) toward the mounting portion 12 side. Therefore, in the normal release operation as shown in FIG. 14 (that is, the normal joint 102 insertion operation), the direction of the force for inserting the joint 102 is the direction in which the force should be applied to release the engagement (protrusion). Direction in which the portions 58A and 58B are displaced toward the mounting portion 12). Therefore, in the normal release operation, the insertion force of the joint 102 is efficiently transmitted to the protrusions 58A and 58B, and the engagement state between the engagement portion 56 and the engaged portions 36A and 36B is reduced with a smaller insertion force. Can be released, and thus the tubular connected state can be released.

  Further, in this configuration, when the joint 102 is inserted and the projecting portions 58A and 58B are pressed, the pressing force is efficiently transmitted to the trunk portion 56A via the projecting portions 58A and 58B as shown in FIG. The body portion 56A is easily bent easily. Then, since the claw portions 56B and 56C formed at the front end portion thereof are surely displaced in conjunction with the bending of the trunk portion 56A, the engaging portion 56 and the engaged portions 36A and 36B are arranged. The engagement state with is more easily released.

  Further, as shown in FIG. 4, the plug cover 10 described above is provided with two projecting portions 58 </ b> A and 58 </ b> B on both sides sandwiching the central axis of the cylindrical portion 14, so that the force due to insertion of the joint 102 is two. The protrusions 58A and 58B are easily transmitted to the second overhanging portion 54 (particularly the trunk portion 56A) in a well-balanced manner, and the engaging portion 56 is more easily displaced. Therefore, when the joint 102 is inserted, the engagement state between the engaging portion 56 and the engaged portions 36A and 36B can be easily released more reliably.

  Further, in this configuration, as shown in FIG. 14, when the regular joint 102 is inserted into the plug cover 10 in a cylindrical connection state and pressed against the bottom 20 side, the opening 102 </ b> A of the joint 102 is provided. By inserting the restricting portion 38 into the center, the center of the joint 102 is brought into the center position of the cylindrical portion 14, and the tip of the joint 102 is moved to the tip of the restricting portion 38 (front end surface). ), The protrusions 58A and 58B are easily pressed well by the tip of the joint 102. Therefore, the engaging portion 56 and the engaged portions 36A and 36B are easily released satisfactorily at the time of a normal releasing operation using the regular parts. On the other hand, as shown in FIG. 15, when the shaft-like object 110 having no opening at the tip is inserted into the plug cover 10 in a cylindrical connection state and pressed against the bottom 20 side, Thus, the restricting portion 38 comes into contact with the tip of the shaft-like object 110, and the protrusions 58A, 58B by the shaft-like object 110 are restricted so as to be impossible or difficult. Therefore, in the case of an unauthorized release operation by an unauthorized shaft-like object, it is possible to make it difficult to release the engaged state by suppressing the pressing on the protrusions 58A and 58B, and it is easy to maintain the cylindrical connection state well. Become. In particular, the restricting portion 38 has a tip portion slightly smaller in diameter than the proximal end portion, and therefore, when the joint 102 is inserted, the restricting portion 38 is easily inserted into the opening 102A of the joint 102. By further pushing the joint 102 after the insertion, a centering action is produced. In FIG. 14, the outer shape of the joint 102 and the position of the opening 102A are conceptually shown by a two-dot chain line. In FIG. 15, the outer shape of the shaft 110 having no opening at the tip is shown by a two-dot chain line. Conceptually.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following examples are also included in the technical scope of the present invention.

  In the embodiment described above, a part of the engaging portion is configured as a claw portion, and the engaged portion is configured as a hole portion. However, the present invention is not limited to this example as long as it can be engaged. For example, the engaging portion may be configured as a hole portion, and the engaged portion may be configured as a claw portion.

  In the above-described embodiment, an example in which two projecting portions are provided has been described. However, the number of projecting portions may be three or more, or only one.

DESCRIPTION OF SYMBOLS 2 ... Gas combustion apparatus with a plug cover 4 ... Gas plug 10 ... Plug cover 12 ... Mounting part 14 ... Cylindrical part 14A ... Insertion port 20 ... Bottom part 30 ... 1st half cylindrical member 32 ... 1st half cylinder part 34 ... 1st One overhanging part 34A ... Wall parts 36A, 36B ... Engaged part 38 ... Restricting part 40 ... Guide part 50 ... Second semi-cylindrical member 52 ... Second semi-cylindrical part 54 ... Second overhanging part 54A ... Wall Part 56 ... Engagement part 56A ... Body part 56B, 56C ... Claw part 58A, 58B ... Projection part 100 ... Gas cord 102 ... Joint 102A ... Opening part

Claims (4)

A shaft-shaped plug cover attached to a gas combustion device having a plug on which a joint provided at a gas cord tip is detachably mounted, and the mounting state on the plug can be released by the joint. ,
A mounting portion that is attached to the plug; and a cylindrical portion that is configured in a cylindrical shape and connected to the mounting portion in the attached state, and the mounting portion is provided on one end side in the axial direction of the cylindrical portion. A bottom portion arranged to cover the plug when in a state is provided, and an insertion port serving as an inlet of the joint in the mounting state is formed on the other axial end side of the cylindrical portion; The part and the cylindrical part are configured by a pair of semi-cylindrical members in a form in which the plug cover is divided along the axial direction.
The first semi-cylindrical member of the pair of semi-cylindrical members projects inwardly from a first semi-cylindrical portion that forms part of the cylindrical portion and an inner peripheral surface of the first semi-cylindrical portion. A first projecting portion, and the second semi-cylindrical member of the pair of semi-cylindrical members includes a second semi-cylindrical portion forming a part of the cylindrical portion, and the second semi-cylindrical member. A second projecting portion projecting inward from the inner peripheral surface of the tubular portion,
In the cylindrical connection state in which the first semi-cylindrical member and the second semi-cylindrical member are connected, at least a part of the first overhanging part is more than at least a part of the second overhanging part. Also, the bottom portion that is arranged on the insertion port side, the first overhanging portion and the second overhanging portion overlap in the axial direction, and divides the inner space side and the mounting portion side of the cylindrical portion Is configured,
In the second overhanging portion, the wall portion on the inner space side is formed with an engaging portion that can engage with a part of the first overhanging portion, and a protruding portion that protrudes toward the insertion port side,
The first overhanging portion includes an engaged portion that can be engaged with the engaging portion, and the protruding portion protrudes closer to the insertion port than the first overhanging portion in the cylindrical connection state. And a guide part that forms a guide area for
In the cylindrical connection state, the cylindrical connection state is maintained by the engagement of the engaging portion and the engaged portion, and the protruding portion is closer to the insertion port than the first overhanging portion. It will be arranged to protrude,
When the protruding portion is pressed toward the mounting portion by the joint inserted from the insertion port in the cylindrical connection state, the engaging portion interlocked with the protruding portion is the engaged portion. The plug cover is in a state of not being engaged with the plug cover, and the cylindrical connection state is released. The engaging portion includes a trunk portion extending from the inner peripheral wall side of the second semi-cylindrical portion to the first semi-cylindrical member side, and a claw portion formed on the distal end portion side of the trunk portion, At least the body is flexibly deformable,
The plug cover according to claim 1, wherein the projecting portion is formed on the body portion.   The plug cover according to claim 1 or 2, wherein at least two of the protrusions are provided on both sides of the central axis of the cylindrical portion. The joint has an opening for gas supply formed on the tip surface side,
In the first overhanging portion, the wall portion on the inner space side is formed with a restricting portion protruding toward the insertion port side,
The restricting portion is disposed at a position that becomes the center of the bottom portion in the cylindrical connected state, and the amount of protrusion toward the insertion port is larger than the protruding portion in the cylindrical connected state. It has a protruding configuration,
In the cylindrical connection state, when the joint is inserted from the insertion port and pressed against the bottom side, the restricting portion is inserted into the opening of the joint, and the tip of the joint The protrusion is pressed,
In the cylindrical connection state, when a shaft-like object having no opening at the tip is inserted from the insertion port and pressed against the bottom side, the restricting portion comes into contact with the tip of the shaft-like object. The plug cover according to any one of claims 1 to 3, wherein pressing of the protruding portion by the shaft-like object is restricted.

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