JP2018071713A - Pipe unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent falling out and reduce labor for manufacturing.SOLUTION: A pipe unit includes a flexible pipe 10 and a one end joint body 12. The one end joint body 12 has a falling-out prevention cylinder body 50 and an outer cylinder body 52. To the falling-out prevention cylinder body 50, one end 40 of the flexible pipe 10 is connected. The outer cylinder body 52 stores the falling-out prevention cylinder body 50. The falling-out prevention cylinder body 50 has a cylindrical falling-out prevention body part and a step. The step is formed on an outer periphery of the falling-out prevention body part. The outer cylinder body 52 has a cylindrical outer cylinder body part and a hook part. The hook part is formed on an inner periphery of the outer cylinder body part. At the hook part, the step of the falling-out prevention cylinder body is hooked.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tube unit.

  Patent document 1 discloses the joint structure of the steel pipe edge part. The joint structure of the steel pipe end part disclosed in Patent Document 1 includes a straight pipe part, an insulating sleeve, and a single nipple. The straight pipe portion is formed on one end side of the stainless steel pipe. The sleeve is integrally fixed to the outer periphery of the end portion of the straight pipe portion by resin molding. The sleeve is provided with an annular groove for inserting an O-ring on the outer peripheral surface thereof. A small diameter step is formed at the rear of the sleeve. The sleeve has a sliding outer peripheral surface with a small coefficient of friction. A threaded portion to be screwed into the mating part is provided on one outer peripheral surface of the central collar portion of the one nipple. The inner circumference on the other side of the central collar portion of the one nipple is larger in diameter than the inner circumference on one side. The single nipple is rotatable with respect to a sleeve inserted in the large diameter portion. An annular groove is provided on the inner periphery within the small diameter step of the sleeve. A stop ring is fitted into the annular groove. The stop ring prevents slipping off.

Japanese Patent Laid-Open No. 9-79445

  The joint structure disclosed in Patent Document 1 has a problem that it takes time and effort for manufacturing. An object of the present invention is to provide a pipe unit that can reduce the labor of manufacture while realizing retaining.

  The tube unit of the present invention will be described with reference to the drawings. The reason why the symbols in the figure are used in this column is to help understand the content of the invention. The use of the symbols in the figure in this column is not intended to limit the scope of the invention to the scope shown.

  In order to achieve the above-described object, according to an aspect of the present invention, the pipe unit includes the pipe 10 and the one-end joint body 12. The one-end joint body 12 connects the pipe 10 to another pipe. The one-end joint body 12 has a retaining cylinder body 50 and an outer cylinder body 52. One end 40 of the tube 10 is connected to the retaining cylinder 50. The outer cylinder body 52 accommodates the retaining cylinder body 50. The retaining cylinder 50 includes a tubular retaining main body 60, a step 64, and a pipe end connecting portion 66. The retaining main body 60 allows the pipe 10 and the outer cylinder 52 to communicate with each other. The step 64 is provided on the outer periphery of the retaining main body 60. The tube end connection part 66 is provided at one end 70 of the retaining main body part 60. The tube end connection portion 66 is a connection point with the one end 40 of the tube 10. The outer cylinder 52 has a cylindrical outer cylinder main body 80, a hooking part 82, and another pipe connection part 84. The pipe 10 connected to the retaining main body 60 enters from one end of the outer cylinder main body 80. The hook 82 is provided on the inner periphery of the outer cylinder main body 80. A step 64 of the retaining cylinder 50 is caught on the hooking portion 82. The other pipe connecting portion 84 is provided at the other end of the outer cylinder main body portion 80. The other pipe connecting portion 84 is connected to another pipe.

  In the tube unit according to the present invention, the stepped portion 64 of the retaining cylinder 50 is caught by the hooking portion 82 of the outer cylinder 52. As a result, the outer cylinder 52 is connected to the retaining cylinder 50. Since the outer cylinder 52 and the retaining cylinder 50 are connected by catching, for example, compared to the case where they are connected by a part such as a stop ring, it is possible to prevent the part from being manufactured by the amount of time and effort for manufacturing the part such as the stop ring. However, the manufacturing effort can be reduced.

  Moreover, it is desirable that the step 64 of the retaining cylinder 50 described above has a retaining-side annular flat surface 90. In this case, it is desirable that the hook portion 82 of the outer cylinder 52 has an outer cylinder-side annular plane 110. The retaining-side annular flat surface 90 extends along the circumferential direction of the retaining main body 60. The retaining-side annular flat surface 90 is an annular flat surface surrounding the outer periphery of the retaining main body 60. The outer cylinder side annular plane 110 extends along the circumferential direction of the outer cylinder main body 80. The outer cylinder side annular plane 110 is an annular plane that is hooked on the retaining side annular plane 90.

  The retaining-side annular plane 90 is an annular plane that surrounds the outer periphery of the retaining main body 60, and the outer cylinder-side annular plane 110 is an annular plane that is caught by the retaining-side annular plane 90. The retaining main body 60 is cylindrical. The outer cylinder side annular flat surface 110 is formed on the inner peripheral surface of the cylindrical outer cylinder main body 80. The retaining-side annular flat surface 90 extends along the circumferential direction of the tubular retaining main body 60. The outer cylinder side annular plane 110 extends along the circumferential direction of the cylindrical outer cylinder main body 80. Thereby, relative movement becomes possible between the outer cylinder main-body part 80 and the retaining main-body part 60 accommodated in this. The tube 10 is connected to one end of the retaining main body 60. Since the tube 10 is connected to one end of the retaining main body 60, relative movement is possible between the outer tube main body 80 and the tube 10. As a result, compared to a case where such relative movement is impossible, the work of connecting the pipe 10 to the other pipe by the one-end joint body 12 becomes easier.

  Alternatively, it is desirable that the above-described prevention-side annular flat surface 90 faces the one end 100 into which the tube 10 of the outer cylinder main body 80 enters. In this case, it is desirable that the outer cylinder side annular plane 110 is opposed to the other end 102 of the outer cylinder main body 80.

  When the retaining-side annular flat surface 90 faces the one end 100 into which the pipe 10 of the outer cylinder main body 80 enters, the one-end joint body 12 is compared with the case where the retaining-side annular flat surface 90 faces the other end 102 of the outer tubular main body 80. After connecting the tubes 10 to other tubes, they are less likely to come off. This is because when the tube 10 receives a tensile force, the retaining cylinder 50 connected thereto is prevented from coming off from the outer cylinder 52.

  Alternatively, it is desirable that the one-end joint body 12 described above further includes an annular penetration preventing ring 56. The penetration preventing ring 56 is accommodated in the outer cylinder main body 80. The penetration preventing ring 56 is fixed to the other end 102 side of the outer cylinder main body 80 when viewed from the retaining cylinder 50. The penetration preventing ring 56 faces the other end 72 of the retaining main body 60 in the retaining cylinder 50.

  The penetration preventing ring 56 prevents the retaining cylinder 50 from coming out of the other end 102 of the outer cylinder main body 80. Thereby, compared with the case where the one-end joint body 12 does not have the penetration preventing ring 56, the retaining cylinder body 50 is less likely to come off from the outer cylinder body 52.

  According to the present invention, it is possible to reduce the labor of manufacturing while realizing retaining.

It is an external view of a pipe unit concerning an embodiment of the present invention. It is a figure which shows the structure of the one end joint body concerning embodiment with this invention. It is an external view of a retaining cylinder according to an embodiment of the present invention. It is an external view of the outer cylinder concerning an embodiment with the present invention. It is an external view of the penetration prevention ring concerning an embodiment with the present invention. It is a figure which shows the structure of the other end coupling body concerning embodiment with this invention.

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

[Description of structure]
FIG. 1 is an external view of a tube unit according to the present embodiment. In FIG. 1, a part of the one-end joint body 12 is cut away. Based on FIG. 1, the structure of the pipe unit of this embodiment is demonstrated. The tube unit includes a flexible tube 10, one end joint body 12, and the other end joint body 14. The flexible tube 10 is a known tube that is alternately arranged so that the concave portions 30 and the convex portions 32 form a row. The flexible tube 10 allows fluid to pass through. In the present embodiment, the fluid that the flexible tube 10 passes is water. Of course, the fluid which the flexible tube 10 passes is not limited to this. In FIG. 1, the middle part of the flexible tube 10 is omitted. One end joint body 12 is connected to one end 40 of flexible tube 10. The other end joint body 14 is connected to the other end 42 of the flexible tube 10. The one-end joint body 12 connects the flexible pipe 10 to a different pipe (for example, a well-known water pipe not shown). Thereby, the inside of the flexible pipe | tube 10 and the inside of a pipe | tube different from this communicate. The one-end joint body 12 can directly connect the flexible pipe 10 to the pipe, or the one-end joint body 12 can be indirectly connected via a well-known joint (not shown).

  FIG. 2 is a diagram illustrating a configuration of the one-end joint body 12 according to the present embodiment. In FIG. 2, a part of the one-end joint body 12 is cut away. Based on FIG. 2, the structure of the one end joint body 12 of this embodiment is demonstrated. In the case of this embodiment, the one-end joint body 12 includes a retaining cylinder body 50, an outer cylinder body 52, a sealing material 54, and a penetration preventing ring 56. One end 40 of the flexible tube 10 is connected to the retaining cylinder 50. In the present embodiment, one end 40 of the flexible tube 10 is connected to the retaining cylinder 50 by welding. The outer cylindrical body 52 accommodates the one end 40 of the flexible tube 10, the retaining cylindrical body 50, the sealing material 54, and the penetration preventing ring 56. The sealing material 54 seals between the inner peripheral surface of the outer cylindrical body 52 and the outer peripheral surface of the retaining cylindrical body 50. Since the sealing material 54 is well known, detailed description thereof will not be repeated here. The penetration preventing ring 56 is fixed to the side opposite to the one end 40 of the flexible tube 10 when viewed from the retaining cylinder 50. The penetration preventing ring 56 faces the retaining cylinder 50.

  FIG. 3 is an external view of the retaining cylinder 50 according to the present embodiment. In FIG. 3, a part of the retaining cylinder 50 is cut away. Based on FIG. 3, the retaining cylinder 50 according to the present embodiment will be described. The retaining cylinder 50 has a tubular retaining main body 60, a seal groove 62, a step 64, and a pipe end connecting portion 66. The retaining main body 60 allows the flexible tube 10 and the outer cylindrical body 52 to communicate with each other. The seal groove 62 is formed on the outer periphery of the retaining main body 60. A seal material 54 is fitted in the seal groove 62. The step 64 is formed on the outer periphery of the retaining main body 60. In the present embodiment, the step 64 has a retaining-side annular flat surface 90. The retaining-side annular flat surface 90 is an annular flat surface surrounding the outer periphery of the retaining main body 60. The retaining-side annular flat surface 90 extends along the circumferential direction of the retaining main body 60 (the direction orthogonal to the central axis 76 of the retaining main body 60 and along the outer peripheral surface of the retaining main body 60). The tube end connection part 66 is provided at one end 70 of the retaining main body part 60. The tube end connection portion 66 is a connection location with the one end 40 of the flexible tube 10. As described above, in the present embodiment, the one end 40 of the flexible tube 10 is connected to the tube end connection portion 66 by welding.

  FIG. 4 is an external view of the outer cylinder 52 according to the present embodiment. In FIG. 4, a part of the outer cylindrical body 52 is cut away. Based on FIG. 4, the structure of the outer cylinder 52 of this embodiment is demonstrated. In the case of this embodiment, the outer cylinder body 52 includes a cylindrical outer cylinder main body portion 80, a hooking portion 82, and a male screw portion 84. The flexible tube 10 enters from one end 100 of the outer cylinder main body 80. The penetration preventing ring 56 is fixed to the other end 102 side of the outer cylinder main body 80 as viewed from the retaining cylinder 50 in the outer cylinder main body 80. The hook 82 is formed on the inner periphery of the outer cylinder main body 80. A step 64 of the retaining cylinder 50 is caught on the hooking portion 82. In the case of this embodiment, the hook portion 82 has an outer cylinder side annular flat surface 110. The outer cylinder side annular plane 110 is an annular plane. The outer cylinder side annular flat surface 110 extends along the circumferential direction of the outer cylinder main body 80 (a direction orthogonal to the central axis 86 of the outer cylinder main body 80 and along the outer peripheral surface of the outer cylinder main body 80). The outer cylinder side annular plane 110 is caught by the retaining side annular plane 90. The male screw portion 84 is formed on the outer peripheral surface of the other end 102 of the outer cylinder main body portion 80. The male thread part 84 is screwed into a female thread part (not shown) of a pipe (for example, a well-known water pipe not shown) other than the flexible pipe 10 or a female thread part of a well-known joint (not shown). Thereby, the external thread part 84 will be connected to the pipe | tube. In the present embodiment, the male screw portion 84 corresponds to the other pipe connecting portion of the present invention.

  FIG. 5 is an external view of the penetration preventing ring 56 according to the present embodiment. In FIG. 5, a part of the penetration preventing ring 56 is cut away. Based on FIG. 5, the structure of the penetration prevention ring 56 of this embodiment is demonstrated. In the present embodiment, the penetration preventing ring 56 is made of rubber. The penetration preventing ring 56 is an annular member. In the case of this embodiment, the outer peripheral surface of the penetration preventing ring 56 is a tapered surface. One end 140 having a small outer diameter in the penetration preventing ring 56 faces the other end 72 of the retaining main body 60 in the outer cylinder main body 80. The other end 142 having a large outer diameter of the penetration preventing ring 56 faces the outside in the outer cylinder main body 80. In the case of this embodiment, the penetration preventing ring 56 is fixed to the inner peripheral surface of the outer cylinder main body 80 by a frictional force.

  FIG. 6 is a view showing a configuration of the other end joint body 14 according to the present embodiment. In FIG. 6, a part of the other end joint body 14 is notched. Based on FIG. 6, the structure of the other end joint body 14 of this embodiment is demonstrated. In the case of the present embodiment, the other end joint body 14 includes a connection cylinder 130 and a female screw portion 132. The other end 42 of the flexible tube 10 is connected to one end 136 of the connection cylinder 130. In the case of this embodiment, these are connected by welding. The female screw portion 132 is provided at the other end 138 of the connection cylinder 130. The female screw portion 132 is screwed into a male screw portion (not shown) of a pipe different from the flexible pipe 10 (for example, a well-known water pipe not shown) or a male screw portion of a well-known joint (not shown).

[Description of manufacturing method]
The tube unit according to this embodiment is manufactured by the following procedure. First, the manufacturer forms the above-described component by a well-known method. When the above-described component is formed, the manufacturer welds one end 136 of the connection cylinder 130 of the other end joint body 14 to the other end 42 of the flexible tube 10 by a known method. When these are welded, the manufacturer connects the joint body 12 to the one end 40 of the flexible tube 10. Therefore, the manufacturer first causes the one end 40 of the flexible tube 10 to pass through the outer cylindrical body 52. When one end 40 of the flexible tube 10 penetrates through the outer cylindrical body 52, the manufacturer welds one end 40 of the flexible tube 10 to one end 70 of the retaining main body 60. When the one end 40 of the flexible tube 10 and the one end 70 of the retaining main body portion 60 are welded, the manufacturer fits the seal material 54 into the seal groove 62 of the connection cylinder 130. When the sealing material 54 is fitted in the seal groove 62, the manufacturer pulls the flexible tube 10 to pull the retaining main body 60 back into the outer cylinder main body 80. Thereafter, the sealing material 54 seals between the inner peripheral surface of the outer cylindrical body 52 and the outer peripheral surface of the retaining cylindrical body 50. When the retaining main body 60 is pulled back into the outer cylinder main body 80, the retaining-side annular plane 90 of the step 64 in the retaining body 60 and the outer-cylinder-side annular plane 110 of the hook 82 in the outer cylinder 52 are hooked. . When the retaining-side annular plane 90 is caught by the outer cylinder-side annular plane 110, the manufacturer inserts the penetration preventing ring 56 into the outer cylinder main body 80 from the other end 102 thereof. The inserted penetration preventing ring 56 is fixed in the outer cylinder main body 80 by a frictional force. When the penetration preventing ring 56 is fixed in the outer cylinder main body 80, the tube unit according to the present embodiment is completed.

[Description of usage]
The pipe unit concerning this embodiment is used in order to connect a well-known water meter and a well-known water supply piping. The connection procedure includes, for example, connecting the other end joint body 14 to a known water supply pipe, then bending the flexible pipe 10 so that the one end joint body 12 goes to a known water meter to be connected, and then In addition, the one-end joint body 12 is connected to the water meter. Of course, the usage method of the tube unit concerning this embodiment is not limited to this. For example, the method of using the pipe unit according to the present embodiment can be used as a method of using the unwinding pipe of a fire extinguishing sprinkler.

[Effect of the pipe unit according to this embodiment]
In the tube unit according to the present embodiment, the outer cylinder body 52 and the retaining cylinder body 50 are connected by being caught. Thereby, compared with the case where these are connected by components, such as a stop ring, the effort of manufacturing can be reduced, implement | achieving retaining, since the effort which manufactures components, such as a stop ring, can be saved.

  In the tube unit according to the present embodiment, relative movement is possible between the outer cylinder main body 80 and the retaining main body 60 accommodated therein. The flexible tube 10 is connected to one end 70 of the retaining main body 60. Since the flexible tube 10 is connected to the one end 70 of the retaining main body 60, relative movement between the outer tube main body 80 and the flexible tube 10 is possible.

  Further, in the tube unit according to the present embodiment, compared to the case where the retaining-side annular flat surface 90 faces the other end 102 of the outer cylinder main body 80, after the one-end joint body 12 connects the flexible tube 10 to the tube, The possibility that the flexible tube 10 is detached from the tube is reduced.

  Further, in the tube unit according to the present embodiment, the penetration preventing ring 56 prevents the retaining cylinder 50 from coming out of the other end 102 of the outer cylinder main body 80.

<Description of modification>
The embodiments disclosed herein are illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment. Of course, various design changes may be made without departing from the spirit of the present invention.

  For example, in the tube unit according to the present invention, the form of the penetration preventing ring 56 is not particularly limited. The mechanism for fixing the penetration preventing ring 56 to the inner peripheral surface of the outer cylinder main body 80 is not particularly limited. For example, a convex portion may be provided on the outer peripheral surface of the penetration preventing ring 56, and a concave portion may be provided on the inner peripheral surface of the outer cylinder main body portion 80. Further, the one-end joint body 12 according to the present invention may not have the penetration preventing ring 56. Moreover, the pipe unit according to the present invention may include a known steel pipe or other pipes instead of the flexible pipe 10.

  The other pipe connecting portion of the one-end joint body 12 may be a female screw portion instead of the male screw portion 84. Further, the other pipe connecting portion may be a known mechanism connected to a well-known joint or a well-known pipe instead of the male screw portion 84. The specific configuration of the other pipe connecting portion is not particularly limited.

  In the pipe unit according to the present invention, the direction in which the retaining-side annular plane 90 faces and the direction in which the outer cylinder-side annular plane 110 faces are not limited to those described above. For example, the retaining-side annular flat surface 90 may face the other end 102 of the outer cylinder main body 80, and the outer cylinder-side annular flat surface 110 may face the one end 100 into which the flexible tube 10 of the outer cylinder main body 80 enters. . Further, the forms of the step 64 of the retaining cylinder 50 and the hooking portion 82 of the outer cylinder 52 are not limited to those described above. For example, the step 64 may have a tapered surface, and the hooking portion 82 may have a curved surface that closely contacts the tapered surface.

  In the tube unit according to the present invention, the configurations of the step 64 of the retaining cylinder 50 and the hooking portion 82 of the outer cylinder 52 are not limited to those described above. That is, the structure for hooking the hook portion 82 of the outer cylinder 52 on the step 64 of the retaining cylinder 50 is not limited to that described above.

  In the pipe unit according to the present invention, the pipe connected to the retaining cylinder 50 and the retaining cylinder 50 can be connected by any means other than welding. An example of such means is a screw connection. The means for connecting the other pipe connecting portion in the present invention to another pipe is not limited to a screw. The other pipe connection part and the other pipe can be connected by any means. The material of the penetration preventing ring 56 is not limited to rubber. In the tube unit according to the present invention, the one end 136 of the connection cylinder 130 and the other end 42 of the flexible tube 10 can be connected by any means other than welding. An example of such means is a screw connection.

DESCRIPTION OF SYMBOLS 10 ... Flexible pipe 12 ... One end joint body 14 ... Other end joint body 30 ... Concave part 32 ... Convex part 40, 70, 100, 136,140 ... One end 42, 72, 102, 138, 142 ... Other end 50 ... Stopping cylinder body 52 ... Outer cylinder 54 ... Sealing material 56 ... Penetration prevention ring 60 ... Preventing main body 62 ... Seal groove 64 ... Step 66 ... Pipe end connecting portions 76, 86 ... Central shaft 80 ... Outer cylinder main body 82 ... Hook 84 ... Male thread part 84 ... Other pipe connection part 90 ... Detaching side annular plane 110 ... Outer cylinder side annular plane 130 ... Connection cylinder 132 ... Female thread part

Claims (4)

Tube,
A pipe unit comprising one end joint for connecting the pipe to another pipe,
The one-end joint body is
A retaining cylinder to which one end of the tube is connected;
An outer cylinder that houses the retaining cylinder,
The retaining cylinder is
A tubular retaining main body for communicating the tube and the outer cylinder;
A step provided on the outer periphery of the retaining main body,
It has a pipe end connection part that is provided at one end of the retaining main body part and is a connection point with one end of the pipe,
The outer cylinder is
A cylindrical outer cylinder main body part into which the pipe connected to the retaining main body part enters from one end;
A hooking portion provided on an inner periphery of the outer cylinder main body portion, on which the step of the retaining cylinder is hooked;
A pipe unit comprising: another pipe connecting portion provided at the other end of the outer cylinder main body portion and connected to the other pipe. The step of the retaining cylinder has a retaining-side annular flat surface that is an annular flat surface extending along the circumferential direction of the retaining main body and surrounding the outer periphery of the retaining main body.
The hook portion of the outer cylinder body has an outer cylinder side annular flat surface that extends along a circumferential direction of the outer cylinder main body portion and is hooked on the retaining-side annular flat surface, which is an annular flat surface. Item 2. The tube unit according to Item 1. The retaining-side annular flat surface faces the one end into which the tube of the outer cylinder main body portion enters,
The tube unit according to claim 2, wherein the outer cylinder side annular plane faces the other end of the outer cylinder main body.   The one end joint body is accommodated in the outer cylinder main body part, fixed to the other end side of the outer cylinder main body part as viewed from the retaining cylinder body, and the retaining body part of the retaining cylinder body The tube unit according to claim 3, further comprising an annular penetration preventing ring facing the other end of the tube.

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