JP2001295980A - Pipeshut-off straightening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrate restoring function applicable to plural sizes of elastic pipes. SOLUTION: Restoring parts 3b, 3c for fitting both pressure portions 1, 2 to be fitted to a maximum bore size elastic pipe Pa with elastic pipes Pb, Pc having a smaller bore size than the maximum bore size elastic pipe Pa, respectively, are superposed on each other and mounted in a detachable manner so that both pressure portions 1, 2 and the restoring parts 3b, 3c can be integrated and carried. The superposed restoring parts 3b, 3c, if removed at a working site as required, correspond to the size of the elastic pipe P. In this state, with both pressure portions 1, 2 moved close to each other, a flat crushed portion P1 is pressurized transversely to the direction of crushing and restored in a circular shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cut-off correction device used for repairing or replacing a gas pipe or a water pipe. More specifically, a pair of pressurizing portions arranged to face each other to sandwich the elastic tube move close to each other, so that the elastic tube is crushed flat and cut off, and is pressed in a direction intersecting with the crushing direction to flatten. The present invention relates to a tube blockage straightening device for restoring a crushed portion to a circular shape.

[0002]

2. Description of the Related Art Conventionally, as this kind of tube blocking correction device,
For example, as disclosed in Japanese Patent Application Laid-Open No. 9-229287, when the pump device is operated by the manual operation of the operation lever of the sandwiching operation mechanism, the pressurizing portion moves closer to crush the elastic tube, and furthermore, the semicircular shape. There is a type in which a flat crushed part is restored to a circular shape by exchanging pressure for the shape-retaining part. Further, as disclosed in Japanese Utility Model Registration No. 3005459, the operation of the cylinder connected to the pump causes the pressurizing portion to move closer to crush the elastic tube and replace the adapter member so that the semicircular portions of the adapter member face each other. The flattened portion is restored to a circular shape by applying pressure, and as described in Japanese Patent Application Laid-Open No. 6-265088, the pressurizing portion is moved closer by the action of a hydraulic tank and the elastic pipe is moved. In some cases, a flat crushed portion is restored to a circular shape by crushing the crushed portion and exchanging the pressure with a semicircular restoring head. On the other hand, for example, elastic pipes such as gas pipes and water pipes are prepared in a plurality of types having different diameters depending on the condition of the pipes. There are three sizes of 25mm. Therefore, in order to cope with these elastic tubes of a plurality of sizes, the same number of restoration parts are required.

[0003]

However, in such a conventional pipe-cutting correction device, only one size of restoration parts can be mounted. Unless brought separately from the device, multiple sizes of elastic tubes cannot be restored. as a result,
Lost restoration parts when moving to the work site,
At the work site, it is necessary to select the restoration part corresponding to the specific elastic tube from the storage location of the restoration part,
There is a problem that the workability on site is poor. In addition, the type in which the two pressurizing parts are moved closer by the operation of a cylinder or a hydraulic tank connected to a pump has the problem that it is not popular because it is not only very heavy but also expensive because the entire device is large. is there.

An object of the present invention is to integrate a restoring function capable of coping with elastic tubes of a plurality of sizes. The second aspect of the present invention aims at simplifying the entire structure in addition to the object of the first aspect of the present invention. The third aspect of the present invention has the object of interrupting the elastic tube within a range of a strain in which a long-term life is allowed for each size of the elastic tube, in addition to the object of the first or second aspect of the present invention. It is.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a pair of pressurizing portions are each half-fitted with an elastic tube having a maximum diameter. A plurality of sets of semicircular concave restoration parts which are formed in a circular concave shape and are fitted with elastic pipes smaller in diameter than the elastic pipe having the maximum diameter, respectively, are provided, and the restoration parts are superimposed on the pressurizing portion. And a pair of crushing pressurizing members are removably mounted at the open ends of the pressurizing portion and the restoring parts so as to face each other. According to a second aspect of the present invention, in the configuration of the first aspect, a screw rod inserted into a main body is connected to one of the pressurizing portions, and a manual operation portion is provided on the screw rod. It is characterized in that a configuration is provided in which the pressing unit is reciprocally supported in a direction in which the pressing unit comes into contact with and separates from each other by a rotation operation of the operation unit. According to a third aspect of the present invention, in the configuration of the first or second aspect, an adjustment is made such that a crushing interval between the two crushing pressurizing bodies when the elastic pipe is crushed is changed corresponding to the elastic pipes having different diameters. It is characterized in that a configuration having means is added.

[0006]

According to the first aspect of the present invention, restoring parts to be fitted to elastic pipes smaller than the elastic pipe having the maximum diameter are respectively superposed on both pressurizing portions which are fitted to the elastic pipe having the maximum diameter. By detachably mounting, both pressure parts and restoring parts can be integrated and carried separately, and at the work site, if necessary, remove the restoring parts that are superimposed and match the diameter of the elastic tube, By moving the two pressing portions closer together in this state, the flat crushed portion is pressed in a direction intersecting with the crushing direction and is restored to a circular shape. According to a second aspect of the present invention, in addition to the configuration of the first aspect, a screw rod inserted into the main body is connected to one of the pressurizing portions, and a manual operating portion is provided on the screw rod, and the manual operation is performed. A configuration has been added in which the pressurizing sections are reciprocally supported in the direction in which the pressurizing sections move toward and away from each other by the rotation operation of the sections. The driving structure of the pressure part is very simple. According to a third aspect of the present invention, in the configuration of the first or second aspect, an adjusting means for changing a crushing interval between the two crushing pressurizing bodies when the elastic pipe is crushed, corresponding to elastic pipes having different diameters. Since the adjusting means corresponds to the elastic pipes having different diameters by adjusting the crushing interval between the two crushing pressurizing bodies, the elastic pipes maintain an appropriate interval for each size. While being crushed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, a screw rod B is vertically penetrated and screwed reciprocally to an upper end portion A1 of a main body A formed in a substantially U-shape as shown in FIGS. An upper pressing portion 1 is fixed to the lower end of the screw rod B, and a lower pressing portion 2 vertically opposed to the upper pressing portion 1 with the elastic tube P interposed therebetween is lower than the lower end portion A2 of the main body A. And is immovably fixed.

The elastic pipe P is a pipe made of an elastically deformable material such as polyethylene, for example. In the case of this embodiment, as shown in FIG. Among the small diameters of 50 mm or less, the elastic pipe Pa having the maximum diameter (for example, 50 mm);
This figure shows a case where three sizes of an elastic pipe Pb having an intermediate diameter (for example, 30 mm) and an elastic pipe Pc having a minimum diameter (for example, 25 mm) are used.

The upper pressing part 1 and the lower pressing part 2 are each formed in a semicircular concave shape so as to fit with the outer peripheral surface of the elastic pipe Pa having the maximum diameter. , 2 are brought into close contact with each other to form a circular shape that matches the elastic pipe Pa having the maximum diameter.

A plurality of sets of upper and lower semicircular concave restoring parts 3b and 3c, which are respectively fitted with an elastic pipe Pb having an intermediate diameter smaller than the elastic pipe Pa having a maximum diameter and an elastic pipe Pc having a minimum diameter, are provided. , These restoration parts 3b, 3c,
The upper pressing unit 1 and the lower pressing unit 2 are removably mounted on top of each other.

A pair of upper and lower restoring parts 3b and 3c, an upper pressing part 1 and a lower pressing part 2 are superposed on each other.
An engaging means 4 for supporting these restoring parts 3b and 3c immovably is formed. In the case of the present embodiment, only one of the restoring part 3b that fits with the elastic pipe Pb having the middle diameter or the restoring part 3c that fits with the elastic pipe Pc having the minimum diameter is formed by the engagement means 4. Are mounted on the upper pressing unit 1 and the lower pressing unit 2 so as to overlap each other.

That is, the engaging means 4 comprises a projection 4d projecting from the upper central part of the upper restoring parts 3b, 3c and a projection 4e projecting from the lower central part of the lower restoring parts 3b, 3c. , An engaging hole 4f formed in the center of the concave surface of the upper pressing portion 1 and an engaging hole 4g formed in the center of the concave surface of the lower pressing portion 2. These upper and lower engaging holes 4f,
In 4g, both the projections 4d and 4e of the restoration part 3b fitted to the middle diameter elastic pipe Pb and the projections 4d and 4e of the restoration part 3c fitted to the minimum diameter elastic pipe Pc are inserted simultaneously. It is not possible.

Further, a concave groove 4h is formed in a projection 4d projecting from the center of the upper surface of the upper restoration parts 3b, 3c.
Engagement hole 4f formed in the center of the concave surface of upper pressing portion 1
, A fall prevention screw 4i is screwed forward and backward corresponding to the concave groove 4h, and the tip of the fall prevention screw 4i is engaged with the concave groove 4h of the projection 4d inserted into the engagement hole 4f. The stop prevents the upper restoration parts 3b and 3c from falling.

An upper pressing unit 1 and a lower pressing unit 2
A pair of upper and lower crushing pressurizing members 5 and 6 are detachably attached to the leading ends of the openings of the restoring parts 3b and 3c superposed thereon, respectively, so as to face each other.

The upper crushing pressurizing member 5 is formed in the shape of a strip protruding downward from a crushing portion 5d having an arc-shaped cross section on the lower surface thereof, and a pair of left and right holding portions 5e, 5e are provided at both ends in the axial direction. The left and right holding portions 5e, 5e sandwich the left and right end surfaces of the upper pressing portion 1 and the upper surface portion 5f of the opening of the upper pressing portion 1 and the upper restoring parts 3b, 3c. By fitting the positioning recesses 1 ′, 3 b ′, 3 c ′ recessed on the surface and further screwing a fixing means 5 g such as a thumb screw from the one holding portion 5 d to the end face of the pressing portion 1 above. The upper pressing part 1 and the upper restoring parts 3b, 3c are fixed so as to cross the leading ends of the openings.

The lower crushing pressurizing member 6 is formed in a strip shape with a crushing portion 6d having an arc-shaped cross section protruding downward on the upper surface thereof, and a pair of left and right holding portions 6e, 6e are provided at both ends in the axial direction. The left and right holding portions 6e, 6e sandwich the left and right end faces of the lower pressing portion 1 while the lower surface portion 6f is open to the lower pressing portion 2 and the opening ends of the lower restoring parts 3b, 3c. By fitting the positioning recesses 2 ", 3b", and 3c "formed on the surface, the fixing portions are fixed so as to traverse the opening ends of the lower pressing portion 2 and the lower restoring parts 3b and 3c right and left.

Further, when the elastic tube P is crushed, the crushing interval between the crushing pressurizing members 5 and 6 is set to be equal to the elastic tube P having a different diameter.
There is provided an adjusting means 7 for changing corresponding to a, Pb, and Pc.

In the case of this embodiment, the adjusting means 7 is a stopper provided between the upper and lower crushing pressurizing members 5 and 6 as shown in FIGS. Three stages are formed corresponding to the different elastic tubes Pa, Pb, Pc,
By selecting from these, the crushing intervals of the upper and lower crushing pressurizing members 5 and 6 are different from each other in elastic tubes Pa and P of different sizes.
It can be changed in accordance with b and Pc.

More specifically, a stopper portion 7a corresponding to the elastic pipe Pa having the largest diameter is provided on the upper end surfaces of two adjustment plates which are held at a constant interval so as to sandwich the lower pressure body 6 for crushing in the axial direction. And a stopper 7b corresponding to the elastic pipe Pb having the intermediate diameter and a stopper 7c corresponding to the elastic pipe Pc having the minimum diameter are formed in a stepped shape, respectively.
One of a, 7b, and 7c is detachably attached to the right and left end portions 5d 'of the upper crushing pressurizing member 5 by, for example, fixing means 7d such as a thumb screw so as to face and abut.

On the other hand, a manual operating portion B1 is provided on a screw rod B screwed to the upper end of the main body A, and the upper pressing portion 1 is rotated by operating the manual operating portion B1 to lower the lower pressing portion. It is supported to reciprocate up and down toward 2.

In the case of this embodiment, the manual operation unit B1
Is a handle B1 detachably engaged with the upper end of the screw rod B. The manual operation unit B1 is not limited to this, and may be manually rotated by engaging a general-purpose tool (not shown) such as a ratchet wrench instead of the handle B1.

Further, a nut B2 for preventing loosening is screwed onto the screw rod B, and the nut B2 is attached to the main body in a state where the elastic tube P is crushed by the upper and lower crushing pressurizing members 5, 6. The screw rod B is prevented from rotating spontaneously in the loosening direction by making contact with the upper end portion A1 of A.

Next, a description will be given of a method of using such a tube blockage correcting device. First, in order to repair or replace an elastic pipe P such as a gas pipe or a water pipe, for example, when the flow path is cut off, the diameter of the elastic pipe P matches the size of the pipe cut-off correction device of the present invention. Let it.

Specifically, as shown in FIG. 1, when the elastic pipe P is an intermediate-diameter elastic pipe Pb, a pair of upper and lower restoring parts 3b fitted with the elastic pipe P are attached to the upper pressing part 1 and the lower pressing part. When the elastic pipe P is an elastic pipe Pc having a minimum diameter, a pair of upper and lower restoring parts 3c to be fitted with the elastic pipe P are attached to the upper pressing section 1 and the lower pressurizing section. Each of the pressure parts 2 is superimposed and attached, and the elastic pipe P
Is the elastic pipe Pa having the maximum diameter, the concave surfaces of the pressurizing portions 1 and 2 are exposed without attaching the restoring parts 3b and 3c.

After the sizes are matched as described above, an upper crushing pressurizing member 5 is attached to the opening end of the upper pressing section 1 and the adjusting means is attached to the opening end of the lower pressing section 2. The lower pressure body 6 for crushing is attached via 7. At this time, the adjusting means 7 is adjusted according to the size of the elastic tube P.

More specifically, when the elastic tube P is an intermediate-diameter elastic tube Pb as shown in FIG. 1, the corresponding stopper portion 7b is opposed to the crushing portion 5d of the upper crushing pressurizing member 5 to abut. When the elastic tube P is the elastic tube Pa having the maximum diameter as shown in FIGS. 3 and 4,
If the corresponding stopper portion 7a is not shown, but is an elastic tube Pc having a minimum diameter, the corresponding stopper 7c is brought into opposite contact with the crushing portion 5d of the upper crushing pressurizing member 5, respectively. Align.

As a result, one of the upper and lower pressurizing portions 1 and 2 and the restoring parts 3b and 3c are integrated, whereby a part of the restoring parts 3b and 3c can be carried and the work site Then, if necessary, the diameter of the elastic tube P can be matched simply by removing the superposed restoration parts 3b, 3c.

The operation of shutting off and restoring the elastic tube P will be described below with reference to the case of the elastic tube Pa having the maximum diameter shown in FIGS.

The elastic pipe P is cut off by using a general-purpose tool such as a handle B1 or a ratchet wrench of the manual operation unit B1 to manually rotate the screw rod B, thereby pressing the upper pressing unit 1 and the crushing unit 5 for crushing. Is moved upward, and the lower pressing portion 2
In addition, a sufficient interval for inserting the elastic tube P is provided between the pressure tube 6 and the crushing pressurizing body 6, and in the case of the illustrated example, the elastic tube Pa having the maximum diameter is inserted as shown by the solid line in FIG.

In this state, the screw rod B is rotated by the manual operation part B1 to lower the upper pressing part 1 and the crushing body 5 as shown by the two-dot chain line in FIG. The elastic tube P is squashed laterally flat by the crushed portion 5d of the pressurizing body 5 and the crushed portion 6d of the lower pressurizing body 6 to form a crushed portion P1. Is cut off.

At the time of this crushing, in the case of the illustrated example,
An upper crushing pressure body 5 is provided on a stopper 7a of the adjusting means 7.
The left and right ends 5d 'of the crushing members 5a and 5b abut on each other, and the crushing intervals of the crushing portions 5d and 6d of the upper and lower crushing pressurizing members 5 and 6 are determined. As a result, the elastic pipe P made of an elastically deformable material such as polyethylene is crushed flat without exceeding the confirmed strain for a long-term life. Therefore, the elastic tubes Pa, Pb, Pc having different diameters by the adjusting means 7.
If the crushing interval between the upper and lower crushing pressurizing members 5 and 6 is changed corresponding to the above, the elastic tubes Pa, Pb and Pc are crushed while maintaining an appropriate interval for each size, and the size of the elastic tube P is changed. In each case, the long-term life can be cut off within the allowable strain range.

Further, in order to maintain the shut-off, a nut B2 screwed to the screw rod B, not shown, is moved upward by manual rotation to abut on the upper end A1 of the main body A, thereby causing the nut B2 to rotate. Then, the screw rod B is locked so that it cannot rotate.

The elastic pipe P can be restored by removing the upper crushing pressurizing member 5 from the opening end of the upper pressurizing section 1 and adjusting the adjusting means 7 and the lower section from the opening end of the lower pressurizing section 2. The crushing pressurizing body 6 is removed, and a flat crushed portion P of the elastic tube P is provided between the upper and lower pressing portions 1 and 2 as shown by a solid line in FIG.
1 is arranged in the vertical direction, and in this state, the upper pressurizing unit 1 is moved downward by manual rotation of the screw rod B. Thereby, the flat crushed portion P1 of the elastic tube P is pressed in a direction intersecting with the crushing direction, and the crushed portion P1 is gradually restored in the lateral direction, and finally is shown by a two-dot chain line in FIG. Restore to a perfect circle as shown.

In the embodiment described above, the upper pressing portion 1 is fixed via a screw rod B to the upper end portion A1 of the main body A formed in a substantially U-shape. The lower pressurizing portion 2 vertically opposed to the main body A is a lower end portion A of the main body A.
2, the body A is not limited to a substantially U-shape as long as the pair of pressing portions 1 and 2 can be arranged so as to be able to approach and move in opposition with the elastic tube P interposed therebetween. And the screw rod B need not be provided.

In the embodiment shown above, only one of the restoring part 3b fitted to the middle-diameter elastic pipe Pb or the restoring part 3c fitted to the minimum-diameter elastic pipe Pc is located above the upper part. The structure is such that it is attached to the pressing part 1 and the lower pressing part 2 in a superimposed manner, but the present invention is not limited to this, and the restoring part 3b fitted to the elastic pipe Pb having an intermediate diameter is used.
The restoring part 3c that fits with the elastic pipe Pc having the minimum diameter may be attached together. Further, the adjusting means 6 is not limited to the above-described structure, and may have another structure as long as it has a similar function.

[0036]

As described above, according to the first aspect of the present invention, the two pressure portions fitted with the elastic pipe having the maximum diameter are provided with the elastic pipe having a diameter smaller than the elastic pipe having the maximum diameter. The restoring parts that fit each other are superimposed on each other and detachably attached, so that both pressurizing parts and restoring parts can be integrated and carried separately. When the parts are removed, the diameter of the elastic tube matches the diameter of the elastic tube.In this state, by moving both pressurizing parts closer together, the flat crushed part is pressed in the direction intersecting the crushing direction and restored to a circular shape. Restoration function that can handle the elastic tube can be integrated. Therefore, compared to conventional ones that can only be mounted with one size of restoration parts, multiple sizes of restoration parts can be restored to the work site without having to bring them separately from the pipe cut-off correction device, As a result, there is no risk of losing the restoration parts when moving to the work site, and there is no need to select a specific elastic pipe and corresponding restoration parts from the storage location of the restoration parts at the work site, so that it is possible to eliminate Workability becomes very good.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the driving structure of the pressing unit is reciprocated in a direction in which the pressing units come into contact with and separate from each other by manual rotation of the screw rod. Since it is very simple, the entire structure can be simplified. Therefore, as compared with a conventional apparatus in which both pressurizing sections are moved closer by the operation of a cylinder or a hydraulic tank connected to a pump, not only the entire apparatus can be reduced in size and weight but also inexpensive.

According to a third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the crushing interval between the two crushing pressurizing members is changed by adjusting means in correspondence with the elastic pipes having different diameters. Since the elastic tube is crushed while maintaining an appropriate interval for each size, the elastic tube can be cut off within a range in which a long-term life is allowed for each size of the elastic tube. Therefore, the life of the elastic tube can be maintained for a long time regardless of the size.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for correcting and blocking a tube according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part.

FIG. 3 is a partially cutaway front view showing an operation of crushing an elastic tube.

FIG. 4 is a front view showing a restoring operation of the elastic tube.

[Explanation of symbols]

P Elastic tube P1 Crushed part Pa Elastic tube of maximum diameter Pb Elastic tube of intermediate diameter Pc Elastic tube of minimum diameter A Body B Screw rod B1 Manual operation unit 1 Pressurizing unit (upper pressurizing unit) 2 Pressurizing unit (lower 3b, 3c Restoration parts 5 Pressing body for crushing (upper pressing body for crushing) 6 Pressing body for crushing (lower pressing body for crushing) 7 Adjusting means

Claims (3)

[Claims] 1. A pair of pressurizing portions (1, 2) arranged to face each other with an elastic tube (P) therebetween so as to approach and move, so that the elastic tube (P) is crushed flat and cut off. Flattened crushed part (P1) by applying pressure in the direction intersecting this crushing direction
A pair of pressurizing portions (1, 2) are each formed in a semicircular concave shape so as to be fitted with an elastic tube (Pa) having a maximum diameter, and the maximum diameter is reduced. A plurality of pairs of semicircular concave restoration parts (3b, 3c) fitted respectively with the elastic pipes (Pb, Pc) smaller in diameter than the elastic pipe (Pa) are provided, and the restoration parts (3b, 3c) are provided. The pressure parts (1, 2) and the parts for restoration (3,
b, 3c), a pair of crushing pressure bodies (5, 6)
Wherein the pipes are detachably mounted so as to face each other. 2. A screw rod (B) inserted through a main body (A) is connected to one of the pressurizing sections (1, 2),
A manual operation section (B1) is provided on the screw rod (B), and the pressurizing sections (1, 2) are supported so as to be reciprocally movable in a direction in which the pressurizing sections (1, 2) come into contact with and separate from each other by a rotation operation of the manual operation section (B1). A device for correcting a tube blocking according to claim 1. 3. An adjustment for changing a crushing interval of the crushing pressurizing members (5, 6) when the elastic pipe (P) is crushed, corresponding to elastic pipes (Pa, Pb, Pc) having different diameters. 3. The device according to claim 1, further comprising means (7).