JP2004150491A - 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 wherein fixing pieces are configurated independently from joint parts, so that the fixing pieces can be firmly fixed to an expanding and contracting movement regulating member, and the expanding and contracting movement of both joint parts can be surely prevented. <P>SOLUTION: The expanding and contracting movement regulating means 4 mounted on the telescopic flexible pipe 1 is composed of the fixing pieces 13 detachably mounted on outer peripheral faces of a pair of case bodies 6 and extended outward in the radial direction, and the movement regulating member 14 fixed to the both fixing pieces 13 at its both end parts. The fixing pieces 13 may have pressing rings 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a telescopic flexible tube restricting and moving device which can be connected to the middle of a fluid transport pipe such as a water pipe, a gas pipe, and a plant pipe so as to cope with fluctuations in an embedded ground.
[0002]
[Prior art]
As a member that regulates the expansion and contraction movement of the telescopic flexible tube in this type of fluid transport tube, as described in Patent Document 1, a fixing bolt (crosslinking member) is used as a member that restricts the relative movement of a pair of case bodies. Is known. FIG. 5 is a semi-longitudinal side view of a telescopic flexible tube restriction device using such fixing bolts. In FIG. 5, the telescopic flexible tube 01 has a pair of joint portions 02 having a symmetric structure. , 04 and a connecting slide pipe 05, and the joint part 02 is composed of a spherical case body 07a and a spherical ring body 08a that can slide on each other. Similarly, the joint part 04 is formed of a spherical case body 07b. And a spherical ring body 08b. Both ends of the connecting slide pipe 05 are slidably and liquid-tightly inserted and supported by the spherical ring bodies 08a and 08b, respectively.
[0003]
The case bodies 07a and 07b are provided with fluid transport pipe connection flanges 06a and 06b at one end, and fixed pieces 09a and 09b that extend outward in the radial direction are integrally formed at an intermediate portion thereof. .
[0004]
Holes (not shown) are formed between the fixing pieces 09a and 09b and into which fixing bolts (rods) 010 having external thread portions formed at both ends can be inserted, and nuts are inserted from both sides with the fixing pieces 09a and 09b interposed therebetween. 012. 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. Further, as disclosed in Patent Document 2, there is also known a fixing piece in which a concave groove is provided on the fixing piece so as to open outward so that a fixing bolt can be easily attached and detached.
[0005]
[Patent Document 1]
JP-A-2000-161556 (page 3-4, FIG. 3)
[Patent Document 2]
JP-A-2000-161560 (page 3, FIG. 4)
[0006]
[Problems to be solved by the invention]
However, in the conventional telescopic movement restricting device of the telescopic flexible tube described in Patent Document 1, the fixing pieces 09a and 09b to which the fixing bolts 010 for restricting the relative movement of the joints 02 and 04 are fixed are the case. Since it is integrally formed with the bodies 07a and 07b, it is necessary to gradually reduce the thickness toward the outside in the radial direction as shown in an enlarged view in FIG. Therefore, even if the nut 012 is tightened to attach the fixing bolt 010 to the fixing pieces 09a and 09b, the nut 012 may loosen without being in surface contact with the end faces of the fixing pieces 09a and 09b. Further, in the case where the fixing piece described in Patent Document 2 is provided with a concave groove that opens outward, when the nut 012 is tightened, the nut 012 slides outward along the tapered thin portion, Sometimes, the fixing bolt 010 could not be fixed firmly.
[0007]
The present invention has been made in view of the above problems, and by configuring the fixing piece separately from the joint portion, the fixing piece can be formed into a shape that can be firmly fixed to a member that restricts expansion and contraction movement. It is another object of the present invention to provide a telescopic flexible tube restricting / contracting device capable of reliably preventing the telescopic movement of both joint portions.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a telescopic flexible tube restricting device for telescopic flexible tube of the present invention is a telescopic flexible tube restricting device for telescopic movement having a pair of joints connected in the middle of a fluid transport pipe, A fixing piece extending outward in the radial direction that supports the expansion / contraction movement restricting member so as to be fixable is detachably attached to each of the joint portions.
According to this feature, since the fixing piece is detachably attached to each joint portion, the fixing piece does not gradually become thinner in the radially outward direction. It can be formed in a shape that can be fixed.
[0009]
In the above telescopic flexible tube expansion and contraction movement restricting device, each of the joints is composed of a case body and a spherical ring body which is in sliding contact with the inner surface of the case, and is disposed between the case body and the spherical ring body. Pressing rings for pressing the annular packing are fixed to the outer peripheral surfaces of the distal ends on the opposite sides of each of the case bodies, and fixing pieces are attached to either the case body or the pressing rings, and the movement restricting members are attached to the fixing pieces facing each other. Is preferably fixed.
In this case, since the fixing piece can be attached to either the case body or the pressing wheel, the degree of freedom in design is increased.
[0010]
In the telescopic flexible tube restricting device, it is preferable that the fixing piece has an L-shaped cross section including a base piece and an outward piece, and the base piece is attached to the outer peripheral surface of the case body or the pressing ring.
In this case, the degree of adhesion between the fixing piece and the case body or the pressing ring is improved, and the bending strength in the tube axis direction can be increased.
[0011]
In the above telescopic flexible tube expansion and contraction movement restricting device, the movement restricting member is a rod having male threads formed at both ends, and both male screw portions are inserted through a pair of fixing pieces, and then screwed to the male screws. It is preferable to fix to the fixing piece by a pair of nuts sandwiching.
In this way, both ends of the movement restricting member can be easily fixed to the fixed piece, and both sides of the fixed piece are finished to a smooth surface that can make surface contact with the end face of the nut, so that the nut can be tightened according to the tightening. The movement restricting member can be firmly fixed to the fixing piece.
[0012]
In the telescopic movement restricting device for a telescopic flexible tube, it is preferable that a free groove extending outside the fixed piece is provided with a concave groove through which the end of the movement restricting member can be inserted and removed.
With this configuration, even if the movement restricting member is long, it can be easily attached to and detached from the fixing piece only by loosening the fixing means such as a nut from the outside of the telescopic flexible tube.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 to 3 show a first embodiment of the present invention. FIG. 1 is a semi-longitudinal side view of a telescopic flexible tube restricting and moving device, and FIG. 3 is a front view of FIG. 2.
[0015]
The telescopic flexible tube 1 includes a pair of front and rear joints 2a and 2b symmetrical to each other, a slide pipe 3 connecting them, and telescopic movement restricting means 4 provided on the outer peripheral surfaces of the two joints 2a and 2b. It is composed of Since the joints 2a and 2b have the same configuration, the following description will be limited to only one joint 2a, and the other joint 2b will be denoted by the same reference numeral and will not be described in detail. I do.
[0016]
The joint portion 2a includes a case body 6 having an inner surface and an outer surface formed as a spherical surface, which is integrally formed with a flange portion 5 for connecting to an end of a fluid transport pipe (not shown) at one end. A spherical ring body 8 movably fitted and having an annular stopper 7 protruding from the outer peripheral surface of the opening end on the other case body 6 side, and a spherical ring body The inner surface of the case body 6 and the outer peripheral surface of the spherical ring body 8 are pressed while pressing the packing 9 inserted in close contact with the outer peripheral surface of the spherical ring body 8 so as to slide on the outer peripheral surface of the spherical ring body 8. And a pressing wheel 10 which is stopped and secured between them.
[0017]
The slide pipe 3 has front and rear ends fitted into the spherical ring bodies 8 via packings 11 inserted into annular grooves on the inner surface of the spherical ring bodies 8 so as to be slidable in the tube axis direction. I have.
[0018]
A pair of stoppers 12a and 12b are provided on the outer peripheral surface of the slide pipe 3 to restrict the relative movement amount of the spherical ring body 8 in the tube axis direction. The stoppers 12a at both ends are detachable.
[0019]
The expansion / contraction movement restricting means 4 includes two fixing pieces 13 attached to the outer peripheral surface of the opposite sides of the case bodies 6 at 180 ° intervals in the circumferential direction so as to face each other. A movement regulating rod 14 as a movement regulating member having both ends fixed to the piece 13.
[0020]
Each fixing piece 13 is formed into an L-shaped cross-sectional shape in a side view by a base piece 13a substantially parallel to the tube axis and an outward piece 13b extending radially outward from one end thereof. Is screwed into a female screw hole 16 formed in the outer peripheral surface of the case body 6 to be detachably attached to the case body 6. The contact surface of the base 13a with the case body 6 is a flat surface, and the outer peripheral surface of the case body 6 is finished to be flat and closely adhered. However, the base 13a is attached to the case body 6 while keeping the arcuate surface. Is also good. Further, the thickness of the outward facing piece 13b is made uniform, and both end faces are finished to a smooth surface.
[0021]
As shown in FIG. 3, a concave groove 17 having an open outer end is formed in the outward piece 13b.
[0022]
Male screws 18 are formed at both ends of the movement restricting rod 14, and these male screws 18 are inserted into the concave grooves 17 of the outward pieces 13 b of the opposed fixing pieces 13 from the outside, and the external screws 13 b Of the two nuts 19 screwed in such a manner as to sandwich them, both ends of the rod 14 are detachably fixed to the fixing piece 13 by tightening the inner one. The outer nut 19 is a lock nut.
[0023]
FIG. 4 shows a semi-longitudinal side view of a telescopic flexible tube restricting and moving device according to a second embodiment of the present invention. Members similar to those of the first embodiment are denoted by the same reference numerals. The detailed description is omitted.
[0024]
In the telescopic movement restricting device of the telescopic flexible tube 1 according to the second embodiment, the base piece 13a of the fixing piece 13 having the same shape as that described above is formed by an annular groove formed on the outer peripheral surface of the opposite end of both case bodies 6. The push ring 10 is secured to the outer peripheral surface of the push ring 10 by a bolt 15 so as to be opposed thereto.
[0025]
The male threads 18 at both ends of the movement restricting rod 14 are fixed by the double nuts 19 through the concave grooves formed in the outwardly facing pieces 13b of both the fixing pieces 13 in the same manner as described above.
[0026]
As described above, in the first and second embodiments, the fixing piece 13 of the telescopic movement restricting means 4 is formed separately from the case body 6 and the pressing wheel 10, so that the fixing piece 13 is different from the conventional case body. Unlike the integral fixed piece, the outward piece 13b does not need to be gradually reduced in thickness in the radially outward direction, and can be brought into surface contact with the nut 19 with a uniform thickness.
[0027]
As a result, the fixed piece 13 and the movement restricting rod 14 are firmly fixed, and the relative movement or rotation of the joints 2a, 2b during transport of the telescopic flexible tube 1, connection of the pipe, a hydraulic test, or the like. It can be prevented and can be reliably held in an immobile state.
[0028]
The present invention is not limited to the above embodiment.
[0029]
In the above embodiment, in order to facilitate attachment and detachment of the movement restricting rod 14, the outward groove 13b of the fixing piece 13 is formed with the concave groove 17 into which the male screws 18 at both ends of the rod 14 can be inserted. Instead of the concave groove 17, a simple circular insertion hole may be formed. It goes without saying that the number of the fixing pieces 13 may be two or more in the circumferential direction.
[0030]
Further, in the above embodiment, the movement restricting rod 14 is attached by being stretched between the fixing pieces 13 and 13a of the joints 2a and 2b. A first movement restricting rod may be provided on both fixed pieces of the slide pipe 2a and the fixed piece of the slide pipe, and a second movement restricting rod may be provided on both fixed pieces of the joint 2b and the slide pipe.
[0031]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0032]
(A) According to the first aspect of the present invention, since the fixing piece is detachably attached to each joint part, the fixing piece is fixed to the joint without gradually becoming thinner radially outward. The shape can be formed so that it can be firmly fixed to the movement restricting member.
[0033]
(B) According to the second aspect of the present invention, since the fixing piece can be attached to either the case body or the pressing ring, the degree of freedom in design is increased.
[0034]
(C) According to the third aspect of the invention, the degree of adhesion between the fixing piece and the case body or the pressing ring is improved, and the bending strength in the tube axis direction can be increased.
[0035]
(D) According to the invention as set forth in claim 4, both ends of the movement restricting member can be easily fixed to the fixing piece, and both side faces of the fixing piece are finished to a smooth surface which can make surface contact with the end face of the nut. Thereby, the movement restricting member can be firmly fixed to the fixing piece in accordance with the tightening of the nut.
[0036]
(E) According to the fifth aspect of the invention, even if the movement restricting member is long, it can be easily attached to and detached from the fixing piece only by loosening the fixing means such as a nut from the outside of the telescopic flexible tube. Work efficiency is improved.
[Brief description of the drawings]
FIG. 1 is a semi-longitudinal side view showing a first embodiment of the present invention.
FIG. 2 is a side view similarly viewed from a telescopic movement restricting means mounting portion side.
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a semi-longitudinal side view showing a second embodiment of the present invention.
FIG. 5 is a semi-longitudinal side view of a conventional telescopic flexible tube telescopic movement restricting device.
FIG. 6 is an enlarged sectional view of a fixing portion between the fixing piece and the fixing bolt.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Elastic flexible pipe 2a, 2b Joint part 3 Slide pipe 4 Elastic movement restricting means 5 Flange part 6 Case body 7 Annular stopper 8 Spherical ring body 9 Packing 10 Pressing ring 11 Packing 12a, 12b Stopper 13 Fixed piece 13a Base piece 13b Outward piece 14 Movement restriction rod 15 Bolt 16 Female screw hole 17 Depressed groove 18 Male screw 19 Nut 20 Ring groove

Claims (5)

An expansion and contraction movement restricting device for a telescopic flexible tube having a pair of joints connected in the middle of a fluid transport pipe, wherein each of the joints extends radially outward to fixably support an expansion and contraction movement restricting member. A telescopic movement restricting device for a telescopic flexible tube, wherein an existing fixing piece is detachably attached. Each of the joints comprises a case body and a spherical ring body which is in sliding contact with the inner surface of the case, and a pressing ring for pressing an annular packing disposed between the case body and the spherical ring body is provided on each of the case bodies. 2. The telescopic device according to claim 1, wherein the fixing member is fixed to the outer peripheral surface of the front end on the opposite side, and the fixed piece is attached to one of the case body and the pressing ring, and the movement restricting member is fixed to the fixed piece facing each other. A device for restricting the expansion and contraction of a flexible tube. The telescopic movement restricting device for a telescopic flexible tube according to claim 2, wherein the fixing piece has an L-shaped cross section including a base piece and an outward piece, and the base piece is attached to an outer peripheral surface of a case body or a pressing ring. The movement restricting member is a rod having external threads formed at both ends, and after inserting both external thread portions through a pair of fixing pieces, the fixing member is fixed to the fixing pieces by a pair of nuts screwed into the male screws and sandwiching the fixing pieces. The telescopic movement restricting device for a telescopic flexible tube according to any one of claims 1 to 3. The telescopic movement restricting device for a telescopic flexible tube according to any one of claims 1 to 4, wherein a recessed groove through which the end of the movement restricting member can be inserted and removed is provided at a free end extending outward of the fixed piece.

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