JP2004150490A - Expanding and contracting movement regulating device for telescopic flexible pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expanding and contracting movement regulating device for a telescopic flexible pipe capable of surely fixing a member for regulating the expanding and contracting movement of the telescopic flexible pipe, to fixing pieces and dispensing with the troublesome mounting operation. <P>SOLUTION: This expanding and contracting movement regulating device for the telescopic flexible pipe comprises a pair of joint parts, the fixing pieces 9a respectively integrated with the pair of joint parts and opened outward in the radial direction at their gradually thinned outer parts, and an expanding and contracting movement regulating member 10 hung between both fixing pieces 9a, and is connected to the middle of a fluid transportation pipe. The fixing pieces 9a are provided with locking sleeves 14 through which the expanding and contracting movement regulating member 10 can penetrate, in a state that they are not removed from the openings, and the expanding and contracting movement regulating member 20 is fixed to the fixing pieces 9a through the locking sleeves 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a pair of joints constituting a telescopic flexible pipe connected in the middle of a fluid transport pipe such as a water pipe, a gas pipe, a plant pipe, and a radially outward direction from the pair of joints. The present invention relates to an expansion / contraction movement restricting device for an elastic flexible tube, comprising: an expansion / contraction movement restricting member bridged between fixed pieces each having a gradually thinner opening.
[0002]
[Prior art]
As a member for restricting the telescopic movement of the telescopic flexible tube in this type of fluid transport tube, a member using a fixing bolt (cross-linking member) as described in Patent Document 1 is known. FIG. 5 is a side sectional view of a telescopic flexible tube using such fixing bolts, and FIG. 6 is a perspective view of a fixing piece. In FIG. 5, a telescopic flexible tube 01 is composed of a pair of joints 02 and 04 having a symmetrical structure and a connecting slide pipe 05, and the joint 02 is provided with a spherical receiving cylinder 07a and an insertion cylinder which can slide on each other. Similarly, the joint part 04 is composed of a spherical receiving port tubular body 07b and an insertion tubular body 08b. Both ends of the connecting slide pipe 05 are slidably and liquid-tightly inserted and supported by the insertion tubular bodies 08a and 8b, respectively.
[0003]
Fluid transport pipe flanges 06a, 06b are provided at one end of the receiving port tubular bodies 07a, 7b, and fixed pieces 09a, 09b are provided at the intermediate portions thereof, which are gradually thinner outwardly open radially outward. Have been.
[0004]
A fixing bolt 010 having screw portions formed at both ends is inserted between the fixing pieces 09a and 09b through the openings 011 shown in FIG. 6 of the fixing pieces 09a and 09b, and is fixed by nuts 012 from both sides with the fixing pieces 09a and 09b interposed therebetween. Fixed. Thus, the flexible tube can be fixed so that it does not expand or contract when the flexible tube 01 is transported, connected to a pipe, or during a water pressure test.
[0005]
[Patent Document 1]
JP-A-2000-161560 (page 3-4, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, the fixing pieces 09a and 09b supporting the fixing bolts 010 for restricting the expansion and contraction movement of the conventional telescopic flexible tube 01 are provided with the openings 011 so that the fixing bolts 010 are inserted from above the openings. Although there is an advantage that can be obtained, since it is formed integrally with the receiving port tubular body 07a, as shown in FIG. 6, the thickness gradually decreases outward in the radial direction (t1> in FIG. 6) as shown in FIG. It had to be t2). Therefore, if the nut 012 is strongly tightened to attach the fixing bolt 010 to the fixing pieces 09a and 09b, the nut 012 may slide outward along the tapered thin portion, and the fixing bolt 010 may not be fixed firmly. was there.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can reliably fix a member for restricting the expansion and contraction movement of a flexible tube to a fixing piece, and furthermore, the expansion and contraction of the expansion and contraction tube which does not require a complicated mounting operation. It aims to provide a regulatory device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a telescopic flexible tube expansion and contraction movement restricting device of the present invention comprises a pair of joints, each of which is formed integrally with the pair of joints, and gradually thins radially outward. An expansion and contraction movement restricting device for a telescopic flexible tube connected in the middle of a fluid transport pipe, comprising a fixed piece having an open outer side and a telescopic movement restricting member bridged between the fixing pieces. The piece is provided with a locking sleeve through which the telescopic movement restricting member can penetrate so as not to be detached from the opening, and the telescopic movement restricting member is fixed to the fixed piece via the locking sleeve. I have.
According to this feature, even if the fixing piece becomes gradually thinner in the radially outward direction, the locking sleeve cannot be detached from the opening, so that the telescopic movement restricting member can be securely fixed to the fixing piece.
[0009]
In the telescopic movement restricting device for a telescopic flexible tube, the pair of joints, the connecting pipe disposed between the two joints, and the pair of joints are formed integrally with each other and radially outward. A fixed piece that is gradually thinner outwardly opened, a pair of fixedly opened pieces that extend radially outward from the connecting pipe, and a pair of bridges that are respectively bridged to the joint and the fixed piece of the connecting pipe. An expansion and contraction movement restricting device for a telescopic flexible tube connected in the middle of a fluid transport pipe, comprising: a locking sleeve through which the expansion and contraction movement restricting member can penetrate at least a fixing piece of the joint portion. Is provided so as not to be detached from the opening, and the telescopic movement restricting member is fixed to the fixing piece of the joint portion via the locking sleeve.
According to this feature, even if the fixing piece is gradually reduced in thickness in the radially outward direction, the locking sleeve cannot be detached from the opening, so that the telescopic movement restricting member can be securely fixed to the fixing piece. Since the pair of telescopic movement restricting members are bridged to the fixed piece of the part and the connecting pipe, respectively, the movement of the telescopic flexible pipe is more reliably prevented, and the length of the telescopic flexible pipe is adjusted at two places. be able to.
[0010]
In the telescopic flexible tube restricting device, it is preferable that the telescopic movement restricting member is fixed to each of the fixing pieces with a pair of nuts screwed into screw portions formed at both ends.
In this case, the expansion and contraction movement restricting member can be easily fixed and removed by tightening and loosening the pair of nuts.
[0011]
In the telescopic flexible tube restricting device, the locking sleeve is inserted from the front end side of the opening of the fixing piece and is separated from the opening by rotating by a predetermined angle in a fitting hole formed at the bottom of the opening. Preferably, it will not be possible.
With this configuration, the locking sleeve through which the telescopic movement restricting member penetrates is inserted from the distal end side of the opening toward the fitting hole, and the telescopic movement restricting member is moved from the opening by rotating the locking sleeve by a predetermined angle. Since it can be prevented from being detached, the work of attaching the telescopic movement restricting member can be easily performed.
[0012]
In the telescopic flexible tube expansion and contraction movement restricting device, the locking sleeve is formed with a slit into which the expansion and contraction movement restricting member can be fitted, and is not detachable from the opening in a fitting hole formed at the bottom of the opening of the fixing piece. Preferably, it is inserted rotatably.
With this configuration, the telescopic movement restricting member is fitted into the locking sleeve through the slit with the locking sleeve inserted first, and then the locking sleeve is rotated to prevent detachment of the telescopic movement restricting member. Therefore, the work of attaching the telescopic movement restricting member can be easily performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of an expansion joint provided with an expansion and contraction movement restricting member according to the present invention, and FIG. FIG. 3C is an enlarged partial cross-sectional view, and FIG.
[0015]
Reference numeral 1 shown in FIG. 1 (a) denotes an expansion joint connected in the middle of the fluid transport pipe. This expansion / contraction flexible pipe 1 is composed of a pair of joint parts 2, 4 having a symmetrical structure and a connecting slide pipe 5. The joint portion 2 is composed of a spherical receiving cylindrical member 7a and an insertion cylindrical member 8a which can slide with each other, and the joint portion 4 is similarly composed of a spherical receiving cylindrical member 7b and an insertion cylindrical member 8b. I have. Both ends of the connecting slide pipe 5 are slidably and liquid-tightly inserted and supported by the insertion tubular bodies 8a and 8b, respectively.
[0016]
The receiving tubular members 7a and 7b are provided at one end with flanges 6a and 6b for fluid transport pipes, respectively, and have fixed portions 9a and 9b which are gradually thinner outwardly open radially outward at an intermediate portion thereof. Is provided.
[0017]
As shown in FIG. 1B, between the fixing pieces 9a and 9b, a fixing bolt 10 as a telescopic movement restricting member having screw portions 10a formed at both ends is attached via a double fixing nut 12. . A plurality of the fixing bolts 10 are bridged in the circumferential direction, and can be fixed so that the telescopic flexible tube 1 does not expand and contract when the telescopic flexible tube 1 is transported, connected to a pipe, or during a water pressure test. In this embodiment, the number of the fixing bolts is equal to four in the circumferential direction, but may be only one.
[0018]
A locking sleeve 14 shown in FIG. 1C is fitted to the fixing bolt 10 at the fixing pieces 9a and 9b. The locking sleeve 14 includes an enlarged head portion 14a that engages with the counterbore hole 11 formed on the side surface of the fixing piece 9a (9b), and a cylindrical portion 14b, and has a center at which the fixing bolt 10 is inserted. A center hole 14c is formed.
[0019]
The procedure for assembling the fixing bolt 10 is as follows. First, the locking sleeve 14 is fitted into the fixing pieces 9a and 9b such that the enlarged head portion 14a thereof comes into contact with the counterbore hole 11, and then the fixing bolt 10 is attached to one of the fixing pieces. For example, it is inserted from the 9a side, passes through the other fixing piece 9b while the double nut 12 is fitted inside, and the locking sleeve 14 is sandwiched between the inner double nut 12 and the outer double nut 12 to fix the fixing bolt 10. Are fixed to the fixing pieces 9a and 9b. A washer may be inserted between the double nut 12 and the locking sleeve.
[0020]
With such a configuration, the movement of the fixing bolt 10 in the left-right direction is restricted by the enlarged head 14a of the locking sleeve 14, and the movement in the opening direction is restricted by the cylindrical portion 14b of the locking sleeve 14.
[0021]
Next, with reference to FIGS. 2A to 2D, a second embodiment of the present invention including a locking sleeve different from the locking sleeve used in the first embodiment will be described. 2A is a perspective view of the locking sleeve, FIG. 2B is a cross-sectional view of the fixing piece, FIG. 2C is a state explanatory view when the locking sleeve is inserted into the opening of the fixing piece, and FIG. It is a state explanatory view at the time.
[0022]
The locking sleeve 16 shown in FIG. 2A includes an enlarged head portion 16a and a fixing piece insertion portion 16b, and has a center hole 16c at the center for inserting the fixing bolt 10. The fixed piece insertion portion 16b is formed by cutting both sides of the cylindrical body, and has a width B substantially equal to the width H of the opening 18 of the fixed piece 17 shown in FIG. It is configured so that it can be inserted from one end.
[0023]
A counterbore 17b into which the enlarged head 16a of the locking sleeve 16 can be fitted, and an arc-shaped fitting hole into which the locking sleeve 16 can rotate after the fixed insertion portion 16b is inserted into the opening 18 in the side face 17a of the fixing piece 17. 17c is formed.
[0024]
Next, a procedure for assembling the fixing bolts will be described with reference to FIGS. The locking sleeves 16 are inserted into both ends of the fixing bolt, and the nut is temporarily tightened. As shown in FIG. 2C, the opening end of the opening 18 of the fixing piece 17 is brought into contact with the bottom of the arcuate fitting hole 17c. More.
[0025]
After the locking sleeve 16 is inserted into the opening of the fixing piece 17, the locking sleeve 16 is rotated 90 degrees as shown in FIG. Thereafter, the temporarily tightened nut is fully tightened, and the fixing bolt is fixed to the fixing piece 17. Accordingly, there is no possibility that the locking sleeve 16 comes out of the opening 18 and the locking sleeve 16 can be put into the opening 18 in a state where the locking sleeve 16 has been previously mounted on the fixing bolt, so that the assembling operation can be easily performed.
[0026]
FIG. 3 is a perspective view of a locking sleeve according to a third embodiment which is different from the locking sleeve used in the first and second embodiments. Can be assembled. The locking sleeve 20 includes an enlarged head portion 20a and a cylindrical portion 20b, and has a slot 20c into which a fixing bolt is inserted.
[0027]
With this configuration, after the locking sleeve 20 is first inserted into the fixing piece, the fixing bolt can be inserted into the slot 20c of the locking sleeve 20 from the opening end. Of course, it is also possible to first insert the fixing bolt into the locking sleeve and insert it from the open end. After the fixing bolt is inserted, the locking sleeve 20 is rotated to prevent the fixing sleeve from coming out of the slot 20c, and then the nut may be tightened with a nut.
[0028]
FIG. 4 is a sectional view of a telescopic flexible tube showing a fourth embodiment in which the telescopic movement restricting member of the present invention is applied to a connecting slide pipe, and the fourth embodiment of the present invention will be described with reference to FIG. . The telescopic flexible tube 21 is composed of a pair of joints 22, 24 having a symmetrical structure and a connecting slide pipe 25, and the joint 22 is formed of a spherical receiving cylindrical body 27a and an insertion cylindrical body 28a which can slide on each other. Similarly, the joint portion 24 is composed of a spherical receiving cylinder 27b and an insertion cylinder 28b.
[0029]
Fluid transport pipe flanges 26a, 26b are provided at one end of each of the receiving tubular bodies 27a, 27b, and fixed pieces 29a, 29b gradually thinner outwardly open radially outward are provided at the intermediate portions thereof. Is provided. Both ends of the connecting slide pipe 25 are slidably and liquid-tightly inserted and supported by the insertion tubular bodies 28a and 28b, respectively, and extend radially outward from the fixed band 30 attached to the central outer peripheral surface. Fixed pieces 30a and 30b are provided.
[0030]
Between the fixing pieces 29a and 30a and between the fixing pieces 29b and 30b, a plurality of fixing bolts 32 serving as expansion and contraction movement restricting members similar to the above-mentioned fixing bolt 10 are arranged in the circumferential direction, and attached via nuts 33. I have. Attachment and removal of the fixing bolt 32 can be performed in the same manner as in the previous embodiment.
[0031]
Since a pair of fixing bolts 32 are cross-linked to the fixing pieces of the receiving cylinders 27a and 27b and the connecting slide pipe 25, the movement of the expandable and contractible flexible tube 21 can be more reliably prevented, and the expansion and contraction can be performed. The length of the flexible tube 21 can be adjusted at two places.
[0032]
In the above-described embodiment, the fixing pieces 9a, 9b, 17, 29a, 29b for attaching the fixing bolts 10, 32 are formed integrally with the receiving cylinders 7a, 7b, 27a, 27b. However, these fixing pieces may be formed separately from the receiving cylinder and attached later.
[0033]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0034]
(A) According to the first aspect of the present invention, even if the fixing piece is gradually reduced in thickness in the radially outward direction, the locking sleeve cannot be detached from the opening. Can be fixed securely.
[0035]
(B) According to the second aspect of the present invention, even if the fixing piece is gradually reduced in thickness in the radially outward direction, the locking sleeve cannot be detached from the opening. In addition, since a pair of telescopic movement restricting members are cross-linked to the joint piece and the fixing piece of the connecting pipe, the movement of the telescopic flexible pipe is more reliably prevented, and The length can be adjusted in two places.
[0036]
(C) According to the third aspect of the invention, it is possible to easily fix and remove the telescopic movement restricting member by tightening and loosening the pair of nuts.
[0037]
(D) According to the invention as set forth in claim 4, the locking sleeve through which the expansion and contraction movement restricting member penetrates is inserted from the distal end side of the opening toward the fitting hole, and the locking sleeve is rotated by a predetermined angle. For example, since the extension / restriction movement restricting member can be prevented from detaching from the opening, the mounting operation of the extension / retraction movement restriction member can be easily performed.
[0038]
(E) According to the fifth aspect of the present invention, the telescopic movement restricting member is inserted into the locking sleeve via the slit with the locking sleeve inserted first, and then the locking sleeve is simply rotated. Since the detachment of the telescopic movement restricting member can be prevented, the mounting operation of the telescopic movement restricting member can be easily performed.
[Brief description of the drawings]
FIGS. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of an expansion joint provided with an expansion / contraction movement restricting member according to the present invention, and FIG. FIG. 3C is an enlarged partial cross-sectional view, and FIG.
FIGS. 2A and 2B show a second embodiment of the present invention having a locking sleeve different from the locking sleeve used in the first embodiment, wherein FIG. 2A is a perspective view of the locking sleeve and FIG. (C) is a state explanatory view when the locking sleeve is inserted into the opening of the fixing piece, and (d) is a state explanatory view when the fixing bolt is fixed.
FIG. 3 is a perspective view of a locking sleeve according to a third embodiment different from the locking sleeve used in the first and second embodiments.
FIG. 4 is a sectional view of a flexible telescopic tube showing a fourth embodiment in which the telescopic movement restricting member of the present invention is applied to a connecting slide pipe.
FIG. 5 is a side sectional view of a telescopic flexible tube using a conventional fixing bolt.
FIG. 6 is a partially enlarged perspective view of the fixing piece of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Telescopic flexible pipe 2, 4 Joint part 5 Connecting slide pipe 6a, 6b Flange 7a, 7b for fluid transport pipe Receptacle cylindrical body 8a, 8b Inserting cylindrical body 9a, 9b Fixing piece 10 Fixing bolt (elastic movement restricting member)
10a Screw part 11 Counterbore 12 Nut 14 Locking sleeve 14a Enlarged head 14b Cylindrical part 14c Center hole 16 Locking sleeve 16a Enlarged head 16b Fixed piece insertion part 16c Center hole 17 Fixed piece 17a Side face 17b Counterbore 17c Circle Arc-shaped fitting hole 18 Opening 20 Locking sleeve 20a Enlarged head 20b Cylindrical portion 20c Slot 21 Telescopic flexible tube 22, 24 Joint 25 Connecting slide pipe 26a, 26b Flange 27a, 27b for fluid transport pipe Receptacle cylindrical body 28a, 28b Insertion cylindrical bodies 29a, 29b Fixing piece 30 Fixing bands 30a, 30b Fixing piece 32 Fixing bolt 33 Nut

Claims (5)

A pair of joints, a fixed piece each formed integrally with the pair of joints, and having a gradually thinner outward opening radially outward, and a telescopic movement restriction bridged between the two fixed pieces. A telescopic movement restricting device for a telescopic flexible tube connected in the middle of a fluid transport pipe including a member and a locking sleeve through which the telescopic movement restricting member can penetrate the fixed piece so as not to be detached from the opening. The telescopic movement restricting device for a telescopic flexible tube is provided, wherein the telescopic movement restricting member is fixed to the fixed piece via the locking sleeve. A pair of joints, a connecting pipe disposed between the two joints, and a fixing piece that is formed integrally with the pair of joints, and has a gradually thinner outward opening radially outward, A fluid transport pipe comprising: a pair of fixed pieces that open radially outward from the connection pipe and open outward; and a pair of telescopic movement restricting members that are respectively bridged to the joint portion and the fixed piece of the connection pipe. A telescopic movement restricting device for a telescopic flexible tube connected in the middle, wherein at least a fixing piece of the joint part is provided with a locking sleeve through which the telescopic movement restricting member can pass, so as not to be detached from the opening, An expansion and contraction movement restricting device for an expansion and contraction flexible tube, wherein an expansion and contraction movement restricting member is fixed to a fixing piece of the joint portion via the locking sleeve. 3. The telescopic flexible tube restricting device according to claim 1, wherein the telescopic movement restricting member is fixed to each of the fixing pieces with a pair of nuts screwed into screw portions formed at both ends. 4. 4. The locking sleeve according to claim 1, wherein the locking sleeve is inserted from a front end side of the opening of the fixing piece and rotated by a predetermined angle in a fitting hole formed at a bottom of the opening so that the locking sleeve cannot be removed from the opening. The telescopic movement restricting device for a telescopic flexible tube according to the above. 4. The locking sleeve according to any one of claims 1 to 3, wherein the locking sleeve has a slit formed therein into which the expansion and contraction movement restricting member can be fitted, and is inserted into a fitting hole formed at the bottom of the opening of the fixing piece so as to be inseparable and rotatable from the opening. An expansion and contraction movement restricting device for an elastic flexible tube according to any one of the above.

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