JPH0673575U - Internal connection tube device - Google Patents

Abstract

(57) [Summary] [Purpose] The insertion pipe inserted into the cutting end of the existing pipe is cut in correspondence with the cutting point of the existing pipe. (EN) Provided is a means for improving workability of mounting work for mounting a base end side portion to a pipe extraction portion. [Structure] An embedded tube 2 having a distal end portion that can be inserted into a cut end portion of a buried existing pipe 1 is provided, and a state in which the distal end portion of the inserted tube 2 is inserted into the existing pipe 1 is made airtight Holding means A for holding the insertion pipe 2 and the existing pipe 1
The base end side portion of the insertion tube 2 generated by cutting corresponding to the cutting point of is attached to the pipe extraction portion 5 of the existing pipe 1 embedded portion via the attachment means B attached to the base end side portion. It is configured to be. Then, a part of the longitudinal direction of the insertion tube 2 is configured to be expandable / contractible in the longitudinal direction by a length at least capable of absorbing a cutting length error when the insertion tube 2 is cut.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insertion connecting tube device, and more specifically, it is provided with an insertion tube into which a distal end side portion can be inserted into a cut end portion of an existing buried tube, and the distal end side portion of the insertion tube is previously installed. A holding means is provided for holding the inserted tube in an airtight state, and a proximal end portion of the insertion tube generated by cutting the insertion tube corresponding to a cutting position of the existing tube. The present invention relates to an insertion connecting pipe device configured to be attached to a pipe extraction portion of an existing pipe burying place via an attaching means attached to a base end side portion thereof.

[0002]

[Prior art]

 Rise pipes standing on the concrete floor surface in water fields such as kitchens, water field penetrating pipes penetrating concrete walls in bathrooms, meter stand pipes standing on concrete ground exposed to wind and rain, etc. Since the re-excavation work is generally performed at the buried locations of various existing pipes, when the existing pipes are deteriorated, the re-excavation work for the buried parts will not be performed. There is a demand to cut and remove the exposed part of the existing pipe and rehabilitate the pipe distribution equipment. Under such a demand, the insertion connecting tube device having the above-mentioned construction is used, and the conventional structure of the insertion connecting tube device is as shown in FIG. That is, a state in which a corrugated pipe with an annular projection and a recess, into which the distal end portion can be inserted into the cut end portion of the existing pipe 1, is provided as the insertion pipe 2, and the distal end portion of the insertion pipe 2 is inserted into the existing pipe 1, A holding means A for holding in an airtight state is provided, and a proximal end portion of the insertion tube 2 generated by cutting the insertion tube 2 corresponding to a cutting position of the existing tube 1 is a proximal end portion thereof. It was adapted to be attached to the pipe extraction portion 5 of the existing pipe burying place via the attachment means B attached to the. The attaching means B includes a main body 8a which is attached to the proximal end portion of the insertion tube 2 so as to be able to communicate with the external pipeline via the nipple 10, and the lower portion thereof is provided with the main body 8a. The nut member 8 is provided with the flange portion 8b with a bolt hole through which the bolt 7 screwed to the extraction portion 5 can be inserted. By the way, since the cut end of the existing pipe 1 may be bent depending on the condition of embedding the pipe, when inserting the insertion tube 2 into the cut end under such a condition, In consideration of workability, the insertion tube 2 should be selected so as to have flexibility of a predetermined level or more, but the insertion tube 2 is softer than necessary considering only the flexibility. If one is adopted, since the insertion tube 2 is a corrugated tube when the insertion tube 2 is inserted to the predetermined depth portion, the insertion tube 2 can be easily contracted in the longitudinal direction, and the workability at the time of insertion is improved. Therefore, conventionally, as the insertion tube 2, the insertion tube 2 can be easily inserted to the predetermined depth portion of the cut end of the existing tube 1 while originally having the flexibility of the predetermined level or more. Rigidity (that is, in the longitudinal direction Which has a rigidity that does not shrink), specifically, the annular uneven portion having the above-mentioned flexibility and rigidity is uniformly distributed at any position in the longitudinal direction as shown in FIG. The corrugated tube with annular irregularities formed so as to exist is adopted as the insertion tube 2. Although such an intubation tube 2 can be bent relatively easily, it can hardly be expanded and contracted in the longitudinal direction. Further, the holding means A was constructed as follows. That is, the tip side cylindrical portion 3a in which the taper surface of the tip side diameter expansion is formed on the outer peripheral surface and the annular seal member 6 (more specifically, the O ring 6A or A combination with a base end side cylindrical portion 3b having an external thread formed on the outer peripheral surface of a male nut capable of screwing a tightening nut 4 which presses and deforms an annular seal member 6) including a lock ring 6B from the base end side. The holding means A is configured by integrally connecting the base end portion of the joint main body 3 to the distal end portion of the insertion tube 2 by means such as welding. Incidentally, 9 in FIG. 4 is a resin filled after the holding means A is mounted so as to improve the sealing property and the fire resistance.

[0003]

[Problems to be solved by the device]

 In the conventional device as described above, the proximal end side appropriate portion of the insertion tube 2 in which the distal end side portion is inserted into the cut end portion of the existing pipe 1 is cut corresponding to the cutting position of the existing pipe 1. However, the cutting of the insertion tube 2 while accurately corresponding the cutting position to the cutting position of the existing pipe 1 means that the work is very close to the pipe extraction part of the existing pipe burying place. Therefore, it is very difficult to work at the correct position because it has to be performed in the same way, and it is also very difficult to cut at an accurate position, and a relatively large cutting length error is unavoidable when cutting the insertion tube 2. It usually occurred in Then, while causing the above-described cutting length error, the proximal end portion of the insertion tube 2 generated after the insertion tube 2 is cut is attached to the proximal end portion of the insertion tube 2 via the attachment means B. The work of attaching to the take-out portion 5 must be carried out while considerably deforming the insertion tube 2 due to the existence of the above-mentioned relatively large cutting length error. There is a problem of workability that it is very poor in workability due to its rigidity. Further, if the cutting length error becomes larger than a certain value, it may be substantially impossible to attach the proximal end portion of the insertion tube 2 to the tube extraction section 5. There was also a problem of workability. The present invention has been made in view of such an actual situation, and an object thereof is to provide an insertion connecting device capable of solving the above-mentioned problem of workability.

[0004]

[Means for Solving the Problems]

 A characteristic configuration of an insertion connecting pipe device (hereinafter, referred to as a device of the present invention) according to the present invention is that an insertion pipe having a distal end side portion can be inserted into a cut end portion of an existing buried pipe, and a tip of the insertion pipe. A holding means is provided for holding the side portion inserted into the existing pipe in an airtight state, and the insertion pipe generated by cutting the insertion pipe in correspondence with the cut portion of the existing pipe. An insertion connecting pipe device configured to attach the base end side portion of the pipe end portion to the pipe lead-out portion of the existing pipe embedded portion through an attaching means attached to the base end side portion. A part of the longitudinal direction of the intubation is configured to be expandable / contractible in the longitudinal direction by a length that can absorb at least a cutting length error at the time of cutting the endotracheal tube.

[0005]

[Action]

 In the device of the present invention having such a characteristic configuration, since a part of the insertion tube is configured to be extendable / contractible in the longitudinal direction as described above, after extending a part of the insertion tube in the longitudinal direction in advance. After inserting the distal end of the insertion tube into the cut end of the existing pipe, cut the appropriate portion of the proximal end of the inserted pipe in the inserted state. It can be executed at a position that is appropriately separated from the take-out section, and the workability at the time of cutting can be improved compared with the conventional method. Even if a relatively large cutting length error occurs during cutting of the insertion tube, the insertion tube should be deformed so that a part of the insertion tube previously stretched in the longitudinal direction is contracted to the original state. The total length of the insertion tube can be changed to an appropriate length for attaching the proximal end side portion of the insertion tube to the tube extraction section, and thus the proximal side section of the insertion tube can be changed to the tube extraction section. When it is attached to the inner tube, it is not necessary to significantly deform the insertion tube as in the conventional case, and the workability is improved compared with the conventional case. Further, it is possible to prevent the cutting length error from being so large that it becomes substantially impossible to attach the proximal end portion of the insertion tube to the tube extraction section.

[0006]

[Effect of device]

 Therefore, according to the present invention, after inserting the insertion tube into the cut end portion of the existing tube, the cutting operation of the inserted insertion tube, and the existing pipe burying point of the proximal end portion of the insertion tube after the cutting The work of attaching the pipe to the pipe take-out portion is easier than that of the conventional work as described above, so that the workability is improved and the object of the present invention is achieved.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals as those in the conventional example indicate the same or corresponding portions.

1 to 3 show one embodiment of the device of the present invention. The device of the present invention is provided with an inner insertion tube 2 into which the tip side portion can be inserted into the end of the existing tube 1, and keeps the state in which the tip side portion of the inner insertion tube 1 is inserted into the existing tube 1 in an airtight state. The holding means A for Further, in the device of the present invention, the base end side portion of the insertion pipe 2 generated by cutting the insertion pipe 2 corresponding to the cut portion of the existing pipe 1 is provided with the attachment means B attached to the base end portion. It is configured to be attached to the pipe extraction portion 5 of the existing pipe burying place via the.

The inner insertion tube 2 is specifically configured as a corrugated tube with annular concavities and convexities made of stainless steel. The pipe extraction unit 5 may be, for example, a concrete floor that erects a rising pipe in a water place such as a kitchen, a concrete wall that penetrates a water passage penetrating pipe in a bathroom, or a meter stand outside when exposed to wind and rain. Examples include concrete floors where pipes are erected.

The attachment means B is attached to the base end side portion of the inner insertion tube 2 so as to be able to communicate with an external conduit via a known pipe joint (in this embodiment, the nipple 10). 8a, and a nut member 8 integrally provided at a lower portion thereof with a bolt hole flange portion 8b into which the bolt 7 screwed and fastened to the pipe extraction portion 5 can be inserted. There is.

The structure in which the nut member 8 is attached to the base end side portion of the insertion tube 2 will be described in more detail. The main body 8a of the nut member 8 is formed on its inner peripheral portion with a female screw that can be screwed into a tapered male screw portion 10a forming a part of the nipple 10. The inner diameter of the main body 8a of the nut member 8 is the outer side of the hooking ring 11 which is divided into two parts as shown in FIG. 3 so that the nut 8 can be fitted onto the annular concave and convex even in the middle of the insertion tube 2. It is set larger than the diameter. The inner diameter of the flange portion 8b of the nut member 8 is set to be smaller than the outer diameter of the latch ring 11. Then, the hooking ring 11 can be fitted into the main body 8a from the base end side (that is, from the side opposite to the flange portion 8b), and the hooking ring 11 that has been fitted therein can be inserted. With the flange portion 8b, the movement toward the front end side is stopped by the flange portion 8b. Then, when the nut member 8 is attached to the proximal end portion of the insertion tube 2 using these members, first, the proximal end portion of the insertion tube 2 is fitted into the nut member 8 in that state. The locking ring 11 is externally fitted and locked on the base end side portion, and the O-ring 12 is arranged on the base end surface thereof, and then the female screw portion of the main body 8a and the tapered male screw portion 10a of the nipple 10 are formed. The nut member 8 is mounted by screwing and fastening. Further, after the nut member 8 is attached to the proximal end portion of the inner insertion tube 2, the bolt 7 is inserted into the bolt hole in the flange portion 8b of the nut member 8, and the bolt 7 is inserted into the pipe extraction portion 5 The proximal end portion of the insertion tube 2 can be attached to the tube extraction section 5 by being screwed and fastened to.

The holding means A is configured as follows. That is, a tip side cylindrical portion 3a having a tapered surface with a diameter expansion on the tip side formed on the outer peripheral surface, and an annular seal member 6 (more specifically, an O ring 6A or a lock ring) externally fitted to the portion where the tapered surface is formed. 6B, etc. The annular seal member 6) which is pressed from the base end side to be deformed by being combined with the base end side cylindrical portion 3b formed with an external thread on the outer peripheral surface of which a male screw that can be screwed is screwed. The holding means A is configured by providing the main body 3 and integrally connecting the base end portion of the joint main body 3 to the distal end portion of the insertion tube 2 by means such as welding. In addition, 9 in FIG. 2 is a resin filled in the vicinity of the base end side of the holding means A in order to improve the sealing property and the fire resistance after the holding means A is mounted.

As described above, the insertion tube 2 is composed of a corrugated tube made of stainless steel and having annular irregularities. In the device of the present invention, the annular irregularity of the insertion tube 2 is the longitudinal length of the insertion tube 2. It is not formed uniformly in all directions, but a part of its longitudinal direction is at least as long as it can absorb a cutting length error at the time of cutting the insertion tube 2, and can be expanded and contracted in the longitudinal direction. It is configured. More specifically, the pitch of the annular irregularities on the distal end side portion 2a of the insertion tube 2 is formed smaller than the pitch of the annular irregularities on the other portion 2b. The other portion 2b inherently has flexibility of a predetermined level or more so that the insertion tube 2 can be easily inserted even with respect to the cut end portion of the bending existing tube 1, A portion having rigidity that does not easily shrink in the longitudinal direction is configured so that the insertion tube 2 can be easily inserted to a predetermined depth portion of the cut end of the tube 1, and the distal end side of the insertion tube 2 The portion 2a constitutes a portion that can be easily expanded and contracted in the longitudinal direction.

In the device of the present invention having such a characteristic configuration, since the distal end side portion 2a of the inner insertion tube 2 is configured to be capable of expanding and contracting in the longitudinal direction, the distal end side portion 2a of the inner insertion tube 2 is previously moved in the longitudinal direction. Insert the distal end side portion 2a of the insertion tube 2 into the cut end portion of the existing tube 2 from the proximal side after the extended state (see FIG. 1, but the mounting means B is already attached in the figure). After that, if the proximal end side of the inserted tube 2 in the inserted state is to be cut, the cutting work is executed at a position appropriately separated from the pipe extraction part 5 of the existing pipe embedded part. The workability at the time of cutting can be improved as compared with the conventional method.

Further, even if a relatively large cutting length error occurs at the time of cutting the insertion tube 2, a part of the insertion tube 2 (that is, the distal end side portion 2a) is extended in the longitudinal direction in advance. The total length of the insertion tube 2 is changed by deforming the inserted tube 2 from the state shown in FIG. 1 to the state shown in FIG. 2 (that is, from the extended state to the original state). Can be changed to an appropriate length for attaching the proximal end side portion of the insertion tube 2 to the tube extraction section 5, and thus, when attaching the proximal end side section of the insertion tube 2 to the tube extraction section 5, There is no need to significantly deform the insertion tube 2 as in the conventional case, and the workability thereof is improved as compared with the conventional case. Also, the cutting length error is not so large that the operation of attaching the proximal end portion of the insertion tube 2 to the tube extraction section 5 is substantially impossible.

Further, in this embodiment, the front portion of the holding means A is located in the vicinity of the proximal end side, that is, around the distal end side portion of the insertion tube 2 in which a portion that can be easily expanded and contracted in the longitudinal direction is formed. Since the resin 9 is filled, the presence of the resin 9 can reinforce the portion that can be easily expanded and contracted in the longitudinal direction after the mounting work.

Next, another embodiment will be described. In the above-described embodiment, a part in the longitudinal direction of the insertion tube 2 configured to extend and contract in the longitudinal direction is the distal end side portion 2a of the insertion tube 2, but a part of the insertion tube 2 in the longitudinal direction is It may be a location other than the distal end side portion 2a of the insertion tube 2. In short, if a portion that absorbs at least a cutting length error when the insertion tube 2 is cut is formed in a part of the longitudinal direction of the insertion tube 2, cutting of the appropriate position on the proximal side of the insertion tube 2 in the inserted state. When performing the above, the insertion tube 2 can be stretched in the longitudinal direction in advance, and at the time of performing the attachment work, the insertion tube 2 can be returned to the original state.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a sectional view showing a process of connecting an insertion tube using the device of the present invention.

FIG. 2 is a cross-sectional view showing a connected state of an insertion tube using the device of the present invention.

FIG. 3 is a sectional view taken along the line EE in FIG.

FIG. 4 is a cross-sectional view showing a connected state of an insertion tube using a conventional device.

[Explanation of symbols]

 1 Existing pipe 2 Internal insertion pipe 5 Pipe extraction section A Holding means B Attachment means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Chiaki Tsutsumi, 2 Daifuku, Kuwana City, Mie Prefecture Inside the Kuwana Factory, Hitachi Metals Ltd.

Claims (1)

[Scope of utility model registration request] 1. An embedded pipe (2) having a distal end portion that can be inserted into a cut end portion of an embedded existing pipe (1) is provided, and a distal end portion of the internal pipe (2) is provided with the existing pipe (2). It is provided by including a holding means (A) for holding the state inserted in 1) in an airtight state, and cutting the insertion tube (2) corresponding to the cutting position of the existing tube (1). The proximal end portion of the insertion pipe (2) is configured to be attached to the pipe extraction portion (5) at the existing pipe burying location via the attachment means (B) attached to the proximal end portion. An insertion connecting tube device, wherein a part of the insertion tube (2) in the longitudinal direction is moved in the longitudinal direction by a length at least capable of absorbing a cutting length error at the time of cutting the insertion tube (2). Internal connection tube device that is configured to be expandable and contractible.