JP2021028496A - Joint structure - Google Patents

Abstract

To reduce a possibility that a joint structure is used with a gap sealing material remained unattached thereto.SOLUTION: A joint structure includes: a flexible pipe 10; and a one end side pipe joint 12. The one end side pipe joint 12 has a pipe connection body 40 and a coupling body 42. The pipe connection body 40 connects the flexible pipe 10 to an object different from the joint structure by a screw. The coupling body 42 is a cylindrical object fixed to the flexible pipe 10. The coupling body 42 is fixed to the flexible pipe 10 to connect the pipe connection body 40 to the flexible pipe 10. The one end side pipe joint 12 further has: an O ring 44; a seal material 46; and a dropping prevention tool 48. The O ring 44 and the seal material 46 seal a gap between the pipe connection body 40 and one end of the coupling body 42. The dropping prevention tool 48 connects the pipe connection body 40 to the coupling body 42 so as to prevent dropping of the one end of the coupling body 42 from the pipe connection body 40.SELECTED DRAWING: Figure 1

Description

The present invention relates to a joint structure.

Patent Document 1 discloses a connector. This fitting has joints connected to one end and the other end of a metal flexible pipe (which consists of thin-walled peaks and valleys). A skirt-shaped flare portion is formed at one end of the flexible tube. The nut constituting the joint has a tapered inner surface that receives the flared portion and a packing accommodating portion. The packing is a rubber packing, that is, a kind of gap sealing material. One end of the packing is a tapered outer surface. The outer surface of the taper presses the flare portion described above against the inner surface of the taper. A metal cylindrical member is mounted on the inner diameter side of the packing.

A person who uses the connector disclosed in Patent Document 1 first inserts one end of a flexible pipe through a nut insertion port. The person then flares one end with a commercially available tool. As a result, a flare portion is formed. The person sandwiches the flared portion between the tapered inner surface of the nut and the tapered outer surface of the packing. Then the person screwed the nut into the gas connection port of the gas meter. The gas connection port is fitted to the nut using a cylindrical member as a guide.

The connector disclosed in Patent Document 1 is fitted into the gas connection port using a cylindrical member as a guide. Since it is fitted in that way, the packing is pressed axially so that it does not deform toward the inner diameter side. Since the packing is pressed in the axial direction, this packing can obtain high sealing performance.

JP-A-2007-78642

The connector disclosed in Patent Document 1 has a problem that a user of the connector may forget to attach a packing, that is, a gap sealing material when connecting the gas meter to the gas connection port. Forgetting to install the gap sealant causes gas leakage. The present invention has been made to solve this problem.

An object of the present invention is to provide a joint structure capable of suppressing the possibility of being used without a gap sealing material attached.

The joint structure of the present invention will be described with reference to the drawings. It should be noted that the reference numerals in the drawings are used in this column to help understanding the contents of the invention, and are not intended to limit the contents to the illustrated range.

According to certain aspects of the invention, in order to achieve the above-mentioned object, the joint structure includes a pipe 10 and one end side pipe joint 12. The one-end side pipe joint 12 is a pipe joint connected to one end 20 of the pipe 10. The one-end side pipe joint 12 has a pipe connecting body 40 and a connecting body 42. The pipe connecting body 40 is a tubular object. The pipe connecting body 40 is an object that screw-connects the pipe 10 to something different from the pipe 10. The connecting body 42 is a tubular object fixed to the pipe 10. The connecting body 42 is fixed to the pipe 10 in order to connect the pipe connecting body 40 to the pipe 10. The pipe connecting body 40 has a space forming portion 80 in the connecting body and a receiving portion 82 at one end of the connecting body. The connecting body space forming portion 80 is a tubular portion. The connecting internal space forming portion 80 forms the tube connecting internal space 100. The pipe-connected internal space 100 is a space connected to the inside of the pipe 10 via the connecting body 42. One end receiving portion 82 of the connecting body is connected to the space forming portion 80 in the connecting body. The one end receiving portion 82 of the connecting body forms an entrance 88 at one end of the connecting body 42. The one end receiving portion 82 of the connecting body receives one end of the connecting body 42 through the entrance 88. The one-end side pipe joint 12 further includes gap sealing members 44 and 46 and a drop-out preventive tool 48. The gap sealing materials 44 and 46 seal the gap between the one end receiving portion 82 of the connecting body and one end of the connecting body 42. The withdrawal prevention tool 48 connects the pipe connecting body 40 to the connecting body 42 so as to prevent one end of the connecting body 42 from coming off from the connecting body one end receiving portion 82. One end receiving portion 82 of the connecting body has one end entry space forming portion 96 and a sealing material accommodating portion 98. The one-end entry space forming portion 96 forms a space in which one end of the connecting body 42 enters. The sealing material accommodating portion 98 accommodates the gap sealing materials 44 and 46.

The gap sealing materials 44 and 46 seal the gap between the one end receiving portion 82 of the connecting body and one end of the connecting body 42. The withdrawal prevention tool 48 connects the pipe connecting body 40 to the connecting body 42 so as to prevent one end of the connecting body 42 from coming off from the one end receiving portion 82 of the connecting body. As a result, the gap sealing materials 44 and 46 housed in the sealing material accommodating portion 98 are prevented from falling out from the sealing material accommodating portion 98. Since the gap sealing materials 44 and 46 are prevented from falling out of the sealing material accommodating portion 98, the gap sealing materials 44 and 46 are accommodated in the sealing material accommodating portion 98 in advance, and the pipe connecting body 40 is connected to the connecting body 42. By setting it, the possibility that the connecting body is used without the gap sealing materials 44 and 46 attached can be suppressed.

Further, it is desirable that the above-mentioned one-sided entry space forming portion 96 has a connecting body space side forming portion 110 and an entrance / exit side forming portion 112. The space-side forming portion 110 in the connecting body is connected to the space forming part 80 in the connecting body. The space-side forming portion 110 in the connecting body forms a space connected to the space 100 in the pipe connecting body among the spaces in which one end of the connecting body 42 enters. The entrance side forming portion 112 is connected to the connecting body space side forming portion 110 via the sealing material accommodating portion 98. The entrance side forming portion 112 forms a space connected to the entrance 88 at one end of the connection 42 in the space where one end of the connection 42 enters. In this case, it is desirable that the sealing material accommodating portion 98 has a surrounding groove forming portion 116 and an adjacent groove forming portion 118. The surrounding groove forming portion 116 forms a groove surrounding one end of the connecting body 42. The adjacent groove forming portion 118 forms a groove adjacent to the surrounding groove forming portion 116 and surrounding one end of the connecting body 42. In this case, it is desirable that the gap sealing materials 44 and 46 have the O-ring 44 and the sealing material 46. The O-ring 44 is housed in a groove formed by the surrounding groove forming portion 116. The O-ring 44 seals the gap between the one-end entry space forming portion 96 and one end of the connecting body 42. The sealing material 46 is housed in a groove formed by the adjacent groove forming portion 118. The sealing material 46 seals the gap between the one-end entry space forming portion 96 and one end of the connecting body 42.

If the O-ring 44 is preliminarily housed in the groove formed by the surrounding groove forming portion 116 and the sealing material 46 is preliminarily housed in the groove formed by the adjacent groove forming portion 118, the O-ring is compared with the case where it is not. The possibility that the connector is used without at least one of the 44 and the sealing material 46 being attached can be suppressed.

Alternatively, it is desirable that the sealing material 46 described above has the functions described below. Its function is to seal the gap between one end of the entry space forming portion 96 and one end of the connecting body 42 at a temperature at which the O-ring 44 loses its function.

According to the present invention, the possibility of being used without the gap sealing material attached can be suppressed.

FIG. 5 is an external view of a joint structure according to an embodiment of the present invention. It is an external view of the pipe connection body which concerns on a certain embodiment of this invention. FIG. 5 is an external view of a connected body according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are designated by the same reference numerals. Their names and functions are also the same. Therefore, detailed explanations about them will not be repeated.

[Composition of joint structure]
FIG. 1 is an external view of a joint structure according to the present embodiment. FIG. 2 is an external view of the pipe connection body according to the present embodiment. FIG. 3 is an external view of the connected body according to the present embodiment. In FIGS. 1 to 3, the illustrated object is shown in a state in which a part thereof is cut out. Hereinafter, the joint structure according to the present embodiment will be described with reference to FIGS. 1 to 3.

The joint structure according to the present embodiment is used to connect one thing that can be screw-connected and another that can be screw-connected. Examples of one thing and another are gas pipes and gas appliances. As a result, the joint structure according to the present embodiment functions as a connector. The joint structure according to the present embodiment includes a well-known flexible pipe 10 made of metal, one end side pipe joint 12, and a well-known other end side pipe joint 14. The one-end side pipe joint 12 is a pipe joint connected to one end 20 of the flexible pipe 10. The other end side pipe joint 14 is a pipe joint connected to the other end 22 of the flexible pipe 10.

The one-end side pipe joint 12 has a pipe connecting body 40 made of metal, a connecting body 42 made of metal, an O-ring 44, a sealing material 46, and a dropout prevention tool 48. The pipe connecting body 40 is a tubular object. The pipe connecting body 40 is an object that screw-connects the flexible pipe 10 to one of the above-mentioned one and the other. The connecting body 42 is a tubular object fixed to the flexible pipe 10. The connecting body 42 is fixed to the flexible pipe 10 in order to connect the pipe connecting body 40 to the flexible pipe 10. In this embodiment, the pipe connecting body 40 is rotatable along the surface of the connecting body 42. The connecting body 42 is connected to the flexible pipe 10 so that its central axis and the central axis of one end 20 of the flexible pipe 10 are coaxial with each other. As a result, the pipe connecting body 40 can rotate in the direction along the surface of one end 20 of the flexible pipe 10. As a result, the connecting body 42 connects the pipe connecting body 40 to the flexible pipe 10 so as to be rotatable in a direction along the surface of one end 20 of the flexible pipe 10. The connecting body 42 is connected to one end 20 of the flexible pipe 10. The O-ring 44 and the sealing material 46 are gap sealing materials according to the present embodiment. The O-ring 44 and the sealing material 46 seal the gap between the pipe connecting body 40 and the connecting body 42. Since the O-ring 44 itself is well known, its detailed description will not be repeated here. In the case of the present embodiment, the sealing material 46 has the following functions. The function is to seal the gap between the pipe connecting body 40 and the connecting body 42 at a temperature at which the O-ring 44 loses its function. The composition of the sealing material 46 for achieving the function and other points of the sealing material 46 are the same as those of the well-known packing. Therefore, their detailed description is not repeated here. The withdrawal prevention tool 48 connects the pipe connecting body 40 to the connecting body 42 so as to prevent the connecting body 42 from coming off from the pipe connecting body 40. In the present embodiment, the drop-out preventer 48 is composed of a ring having a smooth surface and a part notched.

As shown in FIG. 2, the pipe connecting body 40 has a connecting body space forming portion 80 and a connecting body one end receiving portion 82. The connecting body space forming portion 80 is a tubular portion. The connecting internal space forming portion 80 forms the tube connecting internal space 100. The pipe-connected internal space 100 is a space connected to the inside of the flexible pipe 10 via the connecting body 42. One end receiving portion 82 of the connecting body is connected to the space forming portion 80 in the connecting body. The one end receiving portion 82 of the connecting body forms an entrance 88 at one end of the connecting body 42. The one end receiving portion 82 of the connecting body receives one end of the connecting body 42 through the entrance 88 thereof. In the present embodiment, the above-mentioned O-ring 44 and the sealing material 46 are directly sealed by the gap between the one end receiving portion 82 of the connecting body and one end of the connecting body 42. As a result, the O-ring 44 and the sealing material 46 seal the gap between the pipe connecting body 40 and the connecting body 42.

The connecting body space forming portion 80 has a threaded portion 90 and a gap region forming portion 91. The threaded portion 90 is formed at one end of the connecting body space forming portion 80. In the case of this embodiment, the threaded portion 90 is a female thread. In the present embodiment, the screw portion 90 is a portion for connecting the above-mentioned "something that can be screwed". Therefore, the threaded portion 90 is the object connecting portion according to the present embodiment. The gap region forming portion 91 is connected to the screw portion 90 and the one end receiving portion 82 of the connecting body. The gap region forming portion 91 forms the gap region 103. The gap region 103 is a region adjacent to the region 101 in which the above-mentioned “something that can be screwed” enters in the above-mentioned pipe connection internal space 100.

One end receiving portion 82 of the connecting body has one end entry space forming portion 96 and a sealing material accommodating portion 98. The one-end entry space forming portion 96 forms a space in which one end of the connecting body 42 enters. The space into which one end of the connecting body 42 enters is adjacent to the gap region 103. Therefore, the gap region 103 is a gap between the above-mentioned region 101 in which the above-mentioned “something that can be screwed” enters and the space in which one end of the connecting body 42 enters, among the above-mentioned pipe connecting internal space 100. .. The sealing material accommodating portion 98 accommodates the O-ring 44 and the sealing material 46. As a result, in the present embodiment, the O-ring 44 and the sealing material 46 are sealed by the one-end entry space forming portion 96 and the connecting body 42 in the gap between the one end receiving portion 82 of the connecting body and one end of the connecting body 42. It becomes a gap with one end.

The entry space forming portion 96 has an entry space side forming portion 110 and an entrance / exit side forming portion 112. The space-side forming portion 110 in the connecting body is connected to the space forming part 80 in the connecting body. The space-side forming portion 110 in the connecting body forms a space connected to the space 100 in the pipe connecting body among the spaces in which one end of the connecting body 42 enters. The entrance side forming portion 112 is connected to the connecting body space side forming portion 110 via the sealing material accommodating portion 98. The entrance side forming portion 112 forms a space connected to the entrance 88 at one end of the connection 42 in the space where one end of the connection 42 enters.

The entrance side forming portion 112 has a connecting body side groove forming portion 114. The connecting body side groove forming portion 114 forms a groove. The groove surrounds the space formed by the entrance / exit side forming portion 112. The drop-out prevention tool 48 fits in the groove.

The sealing material accommodating portion 98 has a surrounding groove forming portion 116 and an adjacent groove forming portion 118. The surrounding groove forming portion 116 forms a groove surrounding one end of the connecting body 42. The adjacent groove forming portion 118 forms a groove adjacent to the surrounding groove forming portion 116 and surrounding one end of the connecting body 42. In the present embodiment, the O-ring 44 is housed in the groove formed by the surrounding groove forming portion 116. The sealing material 46 is housed in the groove formed by the adjacent groove forming portion 118.

As shown in FIG. 3, the connecting body 42 forms an in-cylinder space 130. The in-cylinder space 130 is a space connected to the inside of the flexible pipe 10.

In the case of the present embodiment, the connecting body 42 has a body portion 140, a pipe end fixing portion 142, and a cylinder side groove forming portion 144. The body portion 140 forms the in-cylinder space 130. The pipe end fixing portion 142 is arranged at one end of the body portion 140. The pipe end fixing portion 142 is fixed to one end 20 of the flexible pipe 10. The cylinder-side groove forming portion 144 is arranged on the outer periphery of any portion of the body portion 140 (in the case of the present embodiment, one end of the body portion 140). The cylinder side groove forming portion 144 is arranged so as to go around the body portion 140. The cylinder side groove forming portion 144 forms a groove. The dropout prevention tool 48 fits into the groove formed by the cylinder side groove forming portion 144.

In the case of the present embodiment, the dropout prevention tool 48 is fitted in the groove formed by the connecting body side groove forming portion 114, and the dropout prevention tool 48 is fitted in the groove formed by the tubular side groove forming portion 144. As a result, the pipe connecting body 40 is rotatably connected to the connecting body 42 in the direction along the surface of one end 20 of the flexible pipe 10. The withdrawal prevention tool 48 connects the pipe connecting body 40 so that the movement in the direction along the central axis of the connecting body 42 is restricted independently of the rotation in the direction along the surface of one end 20 of the flexible pipe 10. It will be connected to the body 42.

The other end side pipe joint 14 is a pipe joint in which the flexible pipe 10 is screw-connected to the other of the above-mentioned one and the other. In the case of this embodiment, the other end side pipe joint 14 is composed of a well-known nipple. In the case of this embodiment, the nipple has a portion that is a male screw. Since the other end side pipe joint 14 is composed of a well-known nipple, the detailed description thereof will not be repeated here.

[How to connect the joint structure]
An example of the connection method of the joint structure according to the present embodiment will be described. The joint structure according to the present embodiment is used in an assembled state as shown in FIG. First, the operator connects the nipple of the other end side pipe joint 14 to something that can be screwed. In this example, it is assumed that the "something that can be screwed" is a pipe joint connected to a gas pipe. When the nipple of the other end side pipe joint 14 is connected to the pipe joint connected to the gas pipe, the operator can screw the threaded portion 90 of the pipe connection body 40 of the one end side pipe joint 12 to another object. Connect to. In this example, it is assumed that the "other thing that can be screwed" is a screw portion provided in a well-known gas appliance. When the threaded portion 90 of the pipe connecting body 40 is connected to the threaded portion provided on the gas appliance, the connection between the gas pipe and the gas appliance by the joint structure according to the present embodiment is completed.

[Explanation of the effect of this embodiment]
As described above, the joint structure according to the present embodiment can suppress the possibility of being used without the gap sealing material attached.

Further, the sealing material 46 of the joint structure according to the present embodiment has the following functions. Its function is to seal the gap between one end of the entry space forming portion 96 and one end of the connecting body 42 at a temperature at which the O-ring 44 loses its function. As a result, even if the joint structure receives high heat due to a cause such as a fire, the possibility that the material in the flexible pipe 10 leaks from the gap between the pipe connecting body 40 and the connecting body 42 is reduced as compared with the case where this is not the case. ..

Further, the joint structure according to the embodiment can suppress the possibility that the sealing action is impaired even if the sealing material or other foreign matter is accidentally inserted into the side pipe joint 12.

[Modification example]
The embodiments disclosed this time are exemplary in all respects. The scope of the invention is not limited based on the embodiments described above. Of course, various design changes may be made to the above-described embodiment without departing from the spirit of the present invention.

For example, the configuration of the other end side pipe joint 14 is not particularly limited. Instead of the nipples described above, other types of fittings may be used.

Further, the one-end side pipe joint 12 may have a threaded portion that is a male thread instead of the threaded portion 90 that is a female thread. The other end side pipe joint 14 may have a female threaded portion instead of the male threaded portion. The joint structure according to the present invention may include a universal joint for a pipe joint instead of the other end side pipe joint 14 described above.

Further, the gap sealing material included in the joint structure according to the present invention is not limited to the above-mentioned one. The joint structure according to the present invention may include another packing instead of the O-ring 44 and the sealing material 46 described above. Of course, the number of packings included in the joint structure according to the present invention is not limited to one.

10 ... Flexible pipe 12 ... One end side pipe joint 14 ... One end side pipe joint 20 ... One end 22 ... The other end 40 ... Pipe connecting body 42 ... Connecting body 44 ... Gap sealing material 44 ... O-ring 46 ... Sealing material 48 ... Extraction Fall prevention tool 80 ... Connection body space forming part 82 ... One end receiving part 88 ... Entrance 90 ... Threaded part 91 ... Gap area forming part 103 ... Gap area 96 ... One end entry space forming part 98 ... Sealing material accommodating part 100 ... Tube connection body space 106 ... Connection body side groove forming part 110 ... Connection body space side forming part 112 ... Entrance / entrance side forming part 114 ... Connecting body side groove forming part 116 ... Surrounding groove forming part 118 ... Adjacent groove forming part 130 ... In-cylinder Space 140 ... Body 142 ... Pipe end fixing part 144 ... Cylinder side groove forming part

Claims (3)

With a tube
It is provided with one end side pipe joint which is a pipe joint connected to one end of the pipe.
The one end side pipe joint
A pipe connecting body that is a tubular object that screw-connects the pipe to something different from the pipe.
A joint structure having a connecting body which is a tubular object fixed to the pipe in order to connect the pipe connecting body to the pipe.
The pipe connection body
A connecting body space forming portion, which is a tubular part forming a tube connecting body space which is a space connected to the inside of the tube via the connecting body,
It has a connecting body end receiving portion that is connected to the connecting body space forming portion, forms an entrance / exit at one end of the connecting body, and receives one end of the connecting body through the entrance / exit.
The one end side pipe joint
A gap sealing material that seals the gap between the one end receiving portion of the connecting body and one end of the connecting body,
Further, it has a drop-out preventer for connecting the pipe connection body to the connection body so as to prevent one end of the connection body from coming off from the one end receiving portion of the connection body.
One end receiving portion of the connecting body
A one-sided entry space forming portion that forms a space into which one end of the connecting body enters,
A joint structure characterized by having a sealing material accommodating portion for accommodating the gap sealing material. The one-end approach space forming part
A space-side forming portion in the connecting body, which is connected to the space forming portion in the connecting body and forms a space connected to the space in the connecting body of the tube among the spaces into which one end of the connecting body enters.
With the entrance side forming portion which is connected to the space side forming portion in the connecting body via the sealing material accommodating portion and forms a space which is connected to the entrance of the one end of the connecting body in the space where one end of the connecting body enters. Have and
The sealing material accommodating part
A surrounding groove forming portion forming a groove surrounding one end of the connecting body,
It has an adjacent groove forming portion that is adjacent to the surrounding groove forming portion and forms a groove that surrounds one end of the connecting body.
The gap sealing material
An O-ring that is housed in the groove formed by the surrounding groove forming portion and seals a gap between the one-end entry space forming portion and one end of the connecting body.
The claim is characterized in that it has a sealing material that is accommodated in the groove formed by the adjacent groove forming portion and that seals a gap between the one end entry space forming portion and one end of the connecting body. The joint structure according to 1. The second aspect of the present invention, wherein the sealing material has a function of sealing a gap between the one-end entry space forming portion and one end of the connecting body at a temperature at which the O-ring loses its function. Joint structure.

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