JPH0441727Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spiral tube with elasticity and flexibility, which is widely used as a protection tube for electric wires and cables, and an end portion of the spiral tube. It relates to a connection structure with a joint member connected to.

(Prior Art) FIG. 9 shows a conventional connection structure between a spiral tube and a joint member.

In this figure, a spiral tube a has a bifurcated fitting part c on one side edge and a fitting part c with a retaining part b, b disposed oppositely on the inner edge of the opening end, and a fitting part c on the other side edge. A band-shaped synthetic resin profile e having a locking portion d that is slidably fitted and locked inside is spirally wound and locked with the fitting portions c that are adjacent to each other in the wound state. It is formed into a cylindrical shape by fitting the part d. The spiral tube a thus constructed can be expanded, contracted or bent by sliding the locking portion d in the axial direction of the tube a within the fitting portion c. Joint part c
The tube diameter can be freely changed by sliding the tube in the circumferential direction of the tube a.

On the other hand, the joint member h is cylindrical and has a connecting part k at one end into which a spiral tube is inserted and connected, and the inner diameter of this connecting part k is made slightly larger than the outer diameter of the spiral tube, Further, the inner diameter is gradually increased toward the opening end, and an abutting portion l that abuts against the end of the spiral tube a is formed on the inner wall surface at the inner part.
is formed along the circumferential direction.

To connect the helical tube a and the joint member h as described above, first apply a filling type bonding agent m to the inner wall surface of the connection part k of the joint member h, and then connect one end of the helical tube a to the This is carried out by pushing the bonding agent m into the connecting portion k until it abuts against the abutting portion l, and curing the bonding agent m while the portion pushed into the connecting portion k is retracted. Then, the spiral tube a and the joint member h
The water sealing property between the two is obtained by the bonding agent m.

(Problems to be Solved by the Invention) However, the above conventional connection structure has the following problems.

In other words, due to its structure, a spiral groove n exists between adjacent fitting parts c on the outer circumferential surface of the spiral tube a, regardless of the state of expansion and contraction of the tube a. n to the connection part k of the joint member h
There was a problem in that it penetrated into the inside of the spiral tube a and entered the tube from the end of the spiral tube a.

In addition, this type of spiral tube a is manufactured by winding the profile e, and the locking portion d slides freely in the circumferential direction of the tube a within the fitting portion c. The accuracy of the outer diameter of the pipe a is low, and as a result, the distance between the outer circumferential surface of the spiral pipe a and the inner wall surface of the connecting part k within the connecting part k of the joint member h is not constant, and the gap is filled. There was a problem in that the amount of binder m present was non-uniform, making it impossible to obtain desirable water-stopping properties.

Furthermore, since the end of the helical tube a is simply inserted into the connection part k of the joint member h, and the two are fixed only by the bonding agent m, the helical tube a is There was a problem in that when the spiral tube a was pulled in a direction away from the joint member h, the spiral tube a could come off from the joint member h.

(Means for Solving the Problems) A connection structure between a helical tube and a coupling member according to the present invention has a fitting portion on one side edge that is bifurcated and has a retaining portion opposite to the inner edge of the open end. , band-shaped synthetic resin profiles having a locking part on the other side edge that is slidably fitted and locked into the fitting part are wound in a spiral shape and are adjacent to each other in the wound state. A connection between a stretchable and flexible helical tube formed into a cylindrical shape by fitting the fitting portion and the locking portion, and a cylindrical joint member connected to an end of the helical tube. The helical tube has an opening end surface of the fitting portion that is located on the outer peripheral side of the tube, and a shoulder that comes into contact with the opening end surface of the adjacent fitting portion when the tube retracts. A waterproof material having elasticity is provided on at least one of the outer surfaces of the profile over the entire length of the profile, and when the end of the spiral tube is inserted into the connecting portion of the coupling member, The end of the spiral tube is in a retracted state within the connecting part, and the end of the spiral tube is maintained in the retracted state by a bonding agent filled between the outer circumferential surface of the end and the inner peripheral surface of the connecting part. It is connected and fixed within the connection part of the joint member.

(Function) The function of the present invention will be described in the first example showing one embodiment of the present invention.
This will be explained with reference to the figures.

The end of the helical tube 1 is inserted into the connection part 13 of the joint member 12 and is brought into a retracted state within the connection part 13, so that the outer circumferential surface of the end and the connection part 13
The end of the spiral tube 1 is connected and fixed within the connecting portion 13 of the joint member 12 while maintaining the retracted state by the bonding agent 15 filled in the tube. In this way, the end of the spiral tube 1 is in the retracted state and the joint member 1 is
2, the adjacent fitting parts 4 are in close contact with each other in the connecting part 13, and the water-stopping material 9 located in the contact part makes the water-stopping property in the contact part perfect. . Therefore, as shown in FIG. 1, the spiral tube 1 is in an extended state near the open end of the connecting portion 13 of the joint member 12, and a relatively large groove 16 is formed between the adjacent fitting portions 4. ,
Even if groundwater or the like flows through this groove 16, the water is blocked by the water stop material 9 at the innermost part of the connection part 13, that is, near the end of the spiral pipe 1, and flows around the end surface of the spiral pipe 1. It will not get inside.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 5, the synthetic resin profile 2 constituting the helical tube 1 of the present invention has a bifurcated shape on one side edge, and a retaining portion 3, 3 is provided oppositely on the inner edge of the open end. It has a fitting part 4 that is
It has a locking part 5 that is slidably fitted and locked into the fitting part 4, and a single rib 7 is provided on the outer wall surface 6 of the fitting part 4, which is the outer circumferential surface of the tube 1, on the profile 2.
The fitting portion 4 is provided protrudingly along the longitudinal direction of the fitting portion 4 .
An elastic water stop material 9 is provided over the entire length of the profile 2 on the open end surface 8, which is located on the outer peripheral side of the tube 1, of the open end surfaces 8, 8.

As the material for the profile 2, thermoplastic resin such as hard vinyl chloride resin is used, for example. Further, as the water stop material 9, for example, soft vinyl, polyethylene vinyl acetate copolymer, synthetic rubber, or the like is preferable. In manufacturing, the profile 1 and the water stop material 9 are continuously extruded in an integrated state along the longitudinal direction by co-extrusion molding.

The profile 2 described above is formed into a cylindrical shape by winding the profile 2 in a spiral shape and fitting the fitting part 4 and the locking part 5 which are adjacent to each other in the wound state. , a spiral tube 1 having stretchability and flexibility is manufactured.

Note that the shape of the profile 2 and the position where the water stop material 9 is provided are not limited to the above embodiments. For example, as shown in FIG. 6, the water-stopping material 9 may be provided on the outer surface 10 of the shoulder portion that comes into contact with the open end surface 8 of the adjacent fitting portion 4 in the rolled state. It may be provided on both the opening end surface 8 and the shoulder outer surface 10. Further, as shown in FIG. 7, a groove 11 having a serrated cross section along the inclination direction is formed on the outer surface 10 of the shoulder portion of the fitting 4 over the entire length of the profile 2, while a groove 11 as described above is formed on the opening end surface 8. Similarly, a water stop material 9 may be provided. Of course, the positional relationship between the grooves 11 and the water stop material 9 may be reversed. Furthermore, the number of ribs 7 provided on the outer wall surface 6 of the fitting part 4 is not limited to one, for example, two ribs may be provided in parallel as shown in FIG. You can.

Next, the joint member 12 in the present invention will be explained.

This joint member 12 has a connecting part 13 into which the end of the spiral tube 1 described above is inserted, and the inner diameter of the connecting part 13 is larger than the outer diameter of the spiral tube 1 (the outer diameter including the ribs 7). It is somewhat large, and gradually increases toward the open end. Further, in the inner part of the connecting portion 13, an abutting portion 14 is provided along the circumferential direction for abutting against the end face of the helical tube 1 and regulating the amount of insertion of the helical tube 1. There is.

Such a joint member 12 is preferably molded, for example, from the same material as the profile 2, and is manufactured, for example, by injection molding, compression molding, or the like.

Therefore, the spiral tube 1 and the joint member 12 as described above, as shown in FIGS. 1 and 2,
The end of the helical tube 1 is inserted into the connecting part 13 of the joint member 12, and is brought into a retracted state within the connecting part 13, so that the peripheral surface of the end and the inner peripheral surface of the connecting part 13 are Due to the bonding agent 15 filled in between,
The end of the spiral tube 1 is connected and fixed within the connecting portion 13 of the joint member 12 while maintaining the retracted state. In this way, since the end of the spiral tube 1 is connected and fixed to the joint member 12 in a retracted state, the adjacent fitting parts 4 in the connecting part 13 come into close contact with each other, and the stop located at the contact part The water material 9 provides complete water-stopping properties in the contact area. Therefore, the first
As shown in the figure, the spiral pipe 1 is in an extended state near the open end of the connecting part 13 of the joint member 12, and a relatively large groove 16 is formed between adjacent fitting parts 4, and underground water etc. 16, the water is blocked by the water stop material 9 at the entrance of the connection part 13,
It does not enter into the connecting portion 13.

The bonding agent 15 used in the present invention is preferably a high-viscosity filler bonding agent such as an epoxy-based, silicone-based, or acrylic-based bonding agent. The bonding agent 15 is applied to an appropriate thickness on the inner circumferential surface of the connecting portion 13 before the end of the spiral tube 1 is inserted into the connecting portion 13 of the joint member 12 . Then, as the bonding agent 15 hardens, the end portion of the spiral tube 1 is fixed in a retracted state within the connecting portion 13.

Incidentally, it is necessary to maintain the contracted state of the end of the helical tube 1 until the bonding agent 15 hardens, and for this purpose, for example, a temporary fixing fastening jig 17 as shown in Figures 3 and 4 is used. Moreover, such a jig 17 is used not only to maintain the contracted state of the end, but also to forcibly bring the end of the helical tube 1 into a contracted state, since the end does not easily become contracted simply by being inserted into the connection part 13.

This jig 17 has tightening bolts 18, 1 on one side edge.
8 and is attached to the outer peripheral surface of the connecting portion 13 of the joint member 12; a bolt insertion hole 20 in the outer peripheral surface through which the tightening bolts 18, 18 are inserted;
20 and is attached to the outer peripheral surface of the spiral tube 1, and tightening nuts 22, 22 are screwed onto the tightening bolts 18, 18.

The fixing member 19 includes semicircular arc-shaped half members 25, 25 each having flanges 24, 24 formed at both ends thereof, each having a bolt insertion hole, and a pair of half members 25, 25 for fastening these half members 25, 25 together. bolts and nuts 26, 27, and several locking protrusions 28 with sharp tips are formed along the circumferential direction on the inner peripheral surfaces of the half members 25, 25. . The tightening bolts 18, 18 are arranged at the center of one side edge of each half member 25, 25.

On the other hand, the locking member 21 includes a first member 31 and a second member 32 each having a semicircular arc shape, each having flanges 30 and 30 having a bolt insertion hole formed therein, and the first member 31 and the second member 32. It is composed of a pair of bolts and nuts 33 and 34 for fastening, and the first member 31 and the second member 32 have
Two elongated holes 35 extending along the circumferential direction are provided between the center portion and the flanges 30 at both ends. Further, locking protrusions 36, 36 are provided at the center of the inner circumferential surface of the first member 31, and engage with the two adjacent ribs 7, 7 of the spiral tube 1 at the same time. A locking protrusion 3 that engages simultaneously with two adjacent ribs 7, 7 of the spiral tube 1 is provided at the center of the circumferential surface.
7, 37 and an auxiliary piece 29 are provided. The bolt insertion holes 20, 20 into which the tightening bolts 18, 18 are inserted are formed by protrusions 3 provided protrudingly at the center of the outer peripheral surfaces of the first member 31 and the second member 32, respectively.
8,38.

Next, the temporary fixing tightening jig 17 as described above
Explain the procedure for using.

First, the tightening bolt 18 provided in one half member 25 of the fixing member 19 is inserted into the bolt insertion hole 20 provided in the first member 31 of the locking member 21. A tightening nut 22 is attached to temporarily connect the half member 25 and the first member 31. Similarly, the other half member 25 of the fixed member 19 and the second member 32 are also temporarily connected.

Subsequently, after applying a bonding agent 15 to the inner circumferential surface of the connecting part 13 of the joint member 12 and inserting the end of the spiral tube 1 into the connecting part 13, the fixing member 19 of the jig 17 is attached to the joint member. It is attached to the outer peripheral surface of the connecting portion 13 of 12. This attachment involves attaching the half members 25, 25 to the outer peripheral surface of the connecting portion 13 at the respective flanges 24,
24 facing each other, a bolt 26 is inserted into a bolt insertion hole formed in both flanges 24, 24, and a nut 27 is screwed into the bolt 26. Then, by tightening these bolts and nuts 26, 27, the half members 25, 25
The locking protrusions 28, 28 on the inner circumferential surface bite into the outer circumferential surface of the joint member 12, and the fixing member 19 is firmly fixed to the outer circumferential surface of the connecting portion 13 of the joint member 12.

Next, the first member 31 of the locking member 21 is connected to the locking protrusions 36, 36 formed on the inner circumferential surface of the first member 31 and the rib of the helical tube 1 located slightly away from the open end of the connecting portion 13. 7 is engaged with the spiral tube 1.
Fit onto the outer circumferential surface of the Further, like the first member 31, the second member 32 is also designed such that the locking protrusions 37, 37 formed on the inner circumferential surface of the second member 32 engage with the ribs 7 of the helical tube 1, and the flanges 30 are mutually connected. They are fitted onto the outer peripheral surface of the spiral tube 1 so as to face each other. The first member 3 fitted onto the outer circumferential surface of the spiral tube 1 in this way
1 and the second member 32 at their flanges 30, 3.
The bolts 33 are inserted into the bolt insertion holes 0 and are connected by tightening the nuts 34.

After completing the above work, finally tighten the tightening nuts 22, 22 attached to the tightening bolts 18, 18.
Tighten evenly. Then, the locking member 21
moves toward the connecting portion 13 of the joint member 12, and along with this, the profile 2 is pushed toward the connecting portion 13, and the end of the spiral tube 1 is forcibly retracted within the connecting portion 13. become. At this time,
The movement status of the profile 2 can be seen through the long holes 35 provided in the first member 31 and the second member 32 of the locking member 21, and the degree of tightening can be confirmed. After the tightening work using the tightening nuts 22, 22 is completed in this manner, the jig 17 is left as it is until the bonding agent 15 is completely cured. And bonding agent 15
Once completely hardened, remove the bolts and nuts 26 and 27 of the fixing member 19 and the bolts and nuts 33 and 34 of the locking member 21, and remove the jig 17 from the helical tube 1 and the coupling member 12. to complete the connection.

In the above embodiment, after the end of the spiral tube 1 is inserted into the connection part 13 of the joint member 12, the end is retracted using the jig 17, and the bonding agent is applied while maintaining the retracted state. Although the helical tube 1 and the joint member 12 are connected and fixed by hardening the helical tube 15, the end of the helical tube 1 is retracted in advance and the retracted state is maintained by appropriate means.
It may be inserted and fixed into the connecting portion 13 of No. 2. Further, the configuration of the jig 17 is not limited to that shown in the above embodiment.

In the above embodiment, the outer wall surface of the fitting portion is provided with a rib, and the end of the spiral tube can be retracted within the connecting portion of the coupling member by utilizing this rib, and there is no risk of directly damaging the outer circumferential surface of the profile. However, the rib is not essential to the present invention.

(Effects of the invention) According to the connection structure between a spiral pipe and a joint member of the present invention, water such as ground water flows through the groove between adjacent fitting parts and forms a spiral inside the joint member, unlike in the conventional case. There have never been any cases where it penetrated into the pipe via the end face of the pipe. Therefore, electric wires, cables, etc. inserted into the spiral tube can be safely protected.

Moreover, since the ribs are present, there is a large resistance to pulling out, and there is no fear that the spiral tube will come off even if it is pulled in a direction away from the joint member.

Furthermore, since the water stop material is provided on the opening end surface or the outer surface of the shoulder of the fitting part, there is no possibility that the sliding movement of the locking part in the fitting member would be hindered by the water stop material as in the past. Therefore, the flexibility of the helical tube is not impaired.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing an embodiment of the connection structure between a spiral pipe and a joint member according to the present invention, Fig. 2 is a front view of the same, and Fig. 3 is an illustration of a tightening jig used in the present invention. FIG. 4 is a sectional view of the embodiment; FIG. 5 is a perspective view of an embodiment of the synthetic resin profile constituting the spiral tube of the present invention;
6 to 8 are perspective views showing other embodiments of the synthetic resin profile, respectively, and FIG. 9 is a partial sectional view showing a conventional connection structure between a helical tube and a joint member. DESCRIPTION OF SYMBOLS 1... Spiral tube, 2... Profile, 3... Removal prevention part, 4... Fitting part, 5... Locking part, 6... Outer wall surface, 7... Rib, 8... Opening end surface, 9 ...Waterstop material, 10...Shoulder outer surface, 12...Joint member, 13
... Connection part, 15 ... Bonding agent.

Claims (1)

[Claims for Utility Model Registration] One side edge has a fitting part that is bifurcated and has a retaining part opposite to the inner edge of the opening end, and the other side edge has a fitting part that is slidably fitted into the fitting part. A band-shaped synthetic resin profile having a locking portion is wound spirally, and in the wound state, the fitting portion and the locking portion that are adjacent to each other are fitted to form a cylindrical shape. A connection structure between a spiral tube having stretchability and flexibility and a cylindrical joint member connected to an end of the spiral tube, the spiral tube having an opening of the fitting portion. A water stop material having elasticity on at least one of the open end face of the end face located on the outer peripheral side of the pipe and the outer surface of the shoulder part that comes into contact with the open end face of the adjacent fitting part when the pipe retracts. is provided over the entire length of the profile, and the end of the spiral tube is inserted into the connecting part of the joint member and is retracted within the connecting part, and the outer periphery of the end The end of the helical tube is connected and fixed within the connecting part of the joint member while maintaining the retracted state by a bonding agent filled between the surface and the inner circumferential surface of the connecting part. A connection structure between a spiral tube and a joint member.