JP3933318B2 - Flexible pipe insertion jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention attaches to the end of a flexible tube having an annular outward convex portion projecting radially outward and an annular inward convex portion projecting radially inward along the longitudinal direction. The present invention relates to a flexible tube insertion jig that is configured to be freely connectable with a cord-like body that is inserted in advance in an insertion hole for installing the flexible tube in an inserted state.
[0002]
[Prior art]
As shown in FIGS. 7 and 8 , such a flexible tube insertion jig has conventionally been provided with a pair of engaging members 31 each having a bottomed cylindrical body divided into two. In the state where the protruding portion 31a that engages the protruding portion 1a to the outside and the protruding portion 1b to the inside of the flexible tube 1 is provided on the peripheral surface, and a part of the protective tube 4 covered with the flexible tube 1 is peeled off, A pair of engaging members 31 are externally fitted to the flexible tube 1, and a bottomed cylindrical cap member 32 is further externally fitted to the pair of engaging members 31, and the anticorrosion tape 16 extends between the cap member 32 and the protective tube 4. the wound, connecting the wire 15 for operation via an auxiliary wire 12 attached to the engaging member 31, as shown in FIG. 9, by operating to pull the wire 15, inserting the flexible tube 1 inserted Hole, for example, concrete It was configured so as to pass through the flexible tube 1 to buried within sheath pipe 2 within.
[0003]
[Problems to be solved by the invention]
Thus, in the conventional insertion jig, since the pair of engaging members 31 functioning as engaging portions with respect to the flexible tube 1 are externally fitted to the outside of the flexible tube 1, both the engaging members 31 are used. The outer diameter A of the cap member 32 is larger than the outer diameter B of the flexible tube 1, and the cap member 32 is fitted on the outside of the engaging member 31. Therefore, when the flexible tube 1 is inserted into the sheath tube 2 by pulling the wire 15, the jig is caught on the inner surface of the sheath tube 2, and the flexible tube 1 There was a drawback that the insertion work did not go smoothly.
[0004]
Of course, if the large-diameter sheath tube 2 is used, the insertion operation of the flexible tube 1 can be performed smoothly. However, since this increases the cost required for the sheath tube 2, the outer diameter B of the flexible tube 1 is usually increased. On the other hand, it is common to use the sheath tube 2 having a slightly larger inner diameter, and thus there are problems as described above.
[0005]
The present invention pays attention to such a conventional problem, and its purpose is to insert the flexible tube even if the inner diameter of the insertion hole through which the flexible tube is inserted is not extremely large with respect to the outer diameter of the flexible tube. An object of the present invention is to provide a flexible tube insertion jig that can perform work smoothly and in a relatively short time.
[0006]
[Means for Solving the Problems]
In order to achieve this object, according to the first aspect of the present invention, the insertion jig engages with the outward convex portion or the inward convex portion of the flexible pipe inside the flexible pipe. As a result, the outer diameter of the flexible tube is formed to be attachable to the end of the flexible tube, and the outer diameter of the flexible tube is the same or almost the same as the outer diameter of the flexible tube or smaller than the outer diameter of the flexible tube. The engaging portion is formed by including two engaging members provided on the outer peripheral surface with a plurality of ridges engaged with the outward convex portion and the inward convex portion inside the flexible tube. The two engaging members are swingable around the pins along the direction in which the plurality of protrusions are arranged and elastically biased in the diameter expanding direction, and resist each other against the elastic force. Can be inserted close to the flexible tube It is provided in such a state.
That is, when the insertion jig is attached to the end of the flexible tube, the engagement portion is engaged with the outward convex portion or the inward convex portion inside the flexible tube, so that the insertion jig is inserted. It is also possible to configure the outer diameter of the tool to be smaller than the outer diameter of the flexible tube. And by forming the outer diameter of the insertion jig to be the same or almost the same as the outer diameter of the flexible pipe at the maximum, the inner diameter of the insertion hole through which the flexible pipe is inserted is not particularly increased. It is possible to reduce the catch on the inner surface of the insertion hole at the time, and to smoothly perform the insertion operation of the flexible tube. Therefore, it is possible to shorten the time required for the insertion operation.
[0007]
Further, according to the invention described in claim 1, wherein the engaging portion, since it is resiliently biased to move into the expanded direction, attaching the insertion jig in the end portion of the flexible tube At this time, the engagement portion can be inserted into the flexible tube in a reduced diameter state against an elastic force, and then the engagement portion can be elastically moved in the diameter-expanding direction. Mounting to the end can also be performed easily and quickly.
[0008]
According to the second aspect of the present invention, since the engaging portion is provided in the state where the engaging portion is moved in the diameter increasing direction, holding means for holding the movement of the engaging portion in the diameter expanding direction is provided. Compared to engaging the engaging part with the outward convex part or the inward convex part of the flexible tube only by the elastic force, the engagement of the engaging part with the flexible tube becomes more reliable and strong, and when the flexible tube is inserted. The occurrence of a situation where the engaging portion is unexpectedly removed can be surely prevented, and the elastic force for moving the engaging portion in the diameter expanding direction can be reduced. The mounting operation can be performed more easily.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A main embodiment of a jig for inserting a flexible tube according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, this insertion jig is used, for example, to insert a stainless steel gas pipe 1, which is an example of a flexible pipe, into a flexible sheath pipe 2 made of synthetic resin. The flexible sheath tube 2 is embedded in the concrete 3 in advance in a state of being appropriately curved along the piping path of the gas pipe 1 when a building such as a general house is constructed. Or placed under the ceiling or under the floor.
The gas pipe 1 inserted through the inside of the sheath pipe 2 includes an annular outward convex portion 1a projecting radially outward and an annular inward convex portion 1b projecting radially inward. A protective tube 4 made of synthetic resin is fitted on the outside of the protective tube 4.
[0012]
As shown in an exploded view in FIG. 1, the insertion jig includes two engagement members 5 and 6 as engagement portions that can be inserted into the gas pipe 1. A plurality of protruding ridges 5 a, 6 a protruding outward are integrally provided on the outer peripheral surface of the, and the protruding ridges 5 a, 6 a of the engaging members 5, 6 are outwardly protruding portions 1 a inside the gas pipe 1. And is configured to be engageable with the inward convex portion 1b.
Therefore, each of the engaging members 5 and 6 is divided into two along the longitudinal direction of the cylindrical body, and the two engaging members 5 and 6 are substantially circular, as shown in FIG. As shown, a gap 7 is formed between the engaging members 5 and 6.
[0013]
On the inner peripheral surface of the intermediate portion in the longitudinal direction of each engagement member 5, 6, the flange portion 8 having a through hole 8 a on one end side and a notch 8 b on the other end side is provided with the engagement members 5, 6. The two engaging members 5 and 6 are swung around the pin 9 by inserting the pin 9 into the through-holes 8a of the both flanges 8 in a state where the position is slightly shifted in the longitudinal direction. It is configured to be able to move.
And the helical spring 10 is wound around the pin 9, and both ends of the helical spring 10 are locked to the notches 8b of the flanges 8, and both the engaging members 5, 6 are Due to the elastic force of the helical spring 10, the pins 9 are elastically biased toward each other in the diameter increasing direction.
[0014]
In a state where such engaging members 5 and 6 are inserted into the gas pipe 1, a part of both engaging members 5 and 6 is configured to protrude from the gas pipe 1. The cap member 11 is provided so as to be attachable in an externally fitted state.
The cap member 11 has a spherical shape on the distal end side, two wire attachment holes 11a are formed on the distal end side, and one auxiliary wire 12 provided with stoppers 12a at both ends of each hole 11a. The end is inserted and attached.
Four screw holes 11b are formed around the cap member 11, and screws 13 are screwed into the screw holes 11b. The screws 13 are tightened to the engagement members 5 and 6. By engaging with the drilled screw holes 5b and 6b, the relative positions of the engaging members 5 and 6 are maintained. That is, the cap member 11 and the screw 13 are configured to function as holding means that holds the movement in the diameter-enlarging direction in a state where both the engaging members 5 and 6 are moved in the diameter-enlarging direction.
[0015]
In order to attach the insertion jig having such a configuration to the end of the gas pipe 1, the two engaging members 5 and 6 are brought close to each other against the elastic force of the helical spring 10 by an artificial force, and the gas is The ridges 5a and 6a inserted into the tube 1 and provided on the outer peripheral portions of the engaging members 5 and 6 are positioned so as to face the outward projecting portion 1a of the gas tube 1 so that the artificial force Is released.
Then, both the engaging members 5 and 6 swing and move in the diameter-expanding direction by the elastic force of the helical spring 10, and as shown in FIG. 2 and FIG. The ridges 5a and 6a engage with the outwardly protruding portion 1a and the inwardly protruding portion 1b inside the gas pipe 1.
[0016]
In a state where the protruding strips 5a and 6a of the both engaging members 5 and 6 are engaged with the outward projecting portion 1a and the inward projecting portion 1b of the gas pipe 1, the cap member 11 is removed from the both engaging members 5 and 6. Fit and tighten the screw 13 to fix the both engaging members 5 and 6 to the cap member 11, peel off a part of the protective tube 4 of the flexible tube 1 as necessary, and anticorrosion tape 16 is wound around the cap member 11 and the protective tube 4 and attached.
However, the protective tube 4 does not necessarily need to be peeled off, and the anticorrosion tape 16 is not necessarily required.
[0017]
In this manner, in the state where the insertion jig is mounted on the end of the flexible tube 1, as shown in FIG. 2, the engagement members 5, 6 as the engagement portions in the longitudinal direction of the flexible tube 1. The outer diameter A is smaller than the outer diameter B of the flexible tube 1, the outer diameter C of the cap member 11 is substantially the same as the outer diameter B of the flexible tube 1, and smaller than the outer diameter D of the protective tube 4. It is configured to be.
As can be seen from FIG. 2, the outer diameter C of the cap member 11 can be further reduced. Therefore, the outer diameter C of the cap member 11 is made smaller than the outer diameter B of the flexible tube 1. Can also be implemented.
[0018]
Next, a procedure for inserting the gas pipe 1 into the sheath pipe 2 using this insertion jig will be described.
First, as shown in FIG. 4 (A), a fixture 14 is attached to the tip from one end opening of the sheath tube 2 embedded in the concrete 3 of the building or disposed under the ceiling or under the floor. A wire 15 is inserted in advance as a cord for pulling operation, and the fixture 14 is protruded from the other end opening of the sheath tube 2.
As shown in FIG. 4B, the auxiliary wire 12 is tied to the protruding fixture 14, and the insertion jig is attached to the end of the gas pipe 1 in accordance with the procedure described above.
[0019]
Thereafter, as shown in FIG. 4 (c), the other end of the wire 15 is pulled manually or wound with a winch or the like outside the drawing to pull the wire 15, and the gas pipe 1 is connected to the sheath pipe. 2 is inserted.
At this time, as described above, the tip end side of the cap member 11 is formed in a spherical shape, and even the outer diameter of the cap member 11 having the largest diameter among the insertion jigs is substantially equal to the outer diameter B of the gas pipe 1. Since the diameter is the same and is smaller than the outer diameter D of the protective tube 4, the insertion jig is caught on the inner surface of the sheath tube 2 even if the sheath tube 2 is curved. There is little fear, and the insertion operation of the gas pipe 1 can be performed smoothly.
[0020]
[Another embodiment]
Next, another embodiment of the flexible tube insertion jig according to the present invention will be described with reference to FIGS. 5 to 6 , but in order to avoid duplicate description, for parts having the same action as the previous embodiment, By assigning the same part numbers, the description thereof is omitted, and only a configuration different from the previous embodiment will be mainly described.
However, the anticorrosion tape 16 is not particularly illustrated, but is wound as necessary.
[0021]
(1) FIG. 5 and FIG. 6 show a slight improvement of the above-described main embodiment. Wire attachment holes 5d are formed in attachment pieces 5c, 6c formed integrally with both engagement members 5, 6. , 6d are drilled, and the auxiliary wire 12 provided with the stopper 12a is inserted into and attached to the holes 5d, 6d of the mounting pieces 5c, 6c, and the cap member 11 is simply inserted into the hole 11a. The auxiliary wire 12 is merely inserted.
[0022]
Further, the cap member 11 is integrally provided with a spacer 11c that can be inserted into a gap 7 generated between the both engaging members 5 and 6, and the cap member 11 is externally fitted to both the engaging members 5 and 6. In this state, as shown in FIG. 6B, the spacer 11c of the cap member 11 is positioned in the gap 7 between the engagement members 5 and 6, and the relative positions of the engagement members 5 and 6 are set. Configured to hold.
That is, in this embodiment, in addition to the cap member 11 and the screw 13, the spacer 11 c also holds the movement in the diameter expansion direction in a state where both the engagement members 5 and 6 are moved in the diameter expansion direction. It is comprised so that it may function as a holding means.
[0031]
( 2 ) In the embodiments described so far, the gas pipe 1 for gas supply has been described as an example of the flexible pipe. However, in addition to the gas pipe, various flexible pipes such as a water pipe, a sewage pipe, or a hot water pipe are used. It can be applied for pipe insertion.
Moreover, although the sheath tube 2 was demonstrated to the example as an insertion hole for inserting a flexible tube, it is possible also when inserting a flexible tube in the insertion hole provided directly in the concrete of a building, or the inside of a wall surface. .
Further, in the embodiments so far, only the example in which the outer diameter A of the engaging members 5 and 6 as the engaging portion is configured to be smaller than the outer diameter B of the gas pipe 1 as the flexible pipe has been shown. A part of the engaging portion is engaged with the outward convex portion of the gas pipe 1 so that the outer diameter A of the engaging portion is the same diameter as or substantially the same as the outer diameter B of the gas pipe 1. It can also be configured.
[Brief description of the drawings]
[Fig. 1] An exploded perspective view of a flexible tube insertion jig [Fig. 2] A longitudinal sectional view of a flexible tube insertion jig [Fig. 3] A transverse sectional view of a flexible tube insertion jig [Fig. 4] FIG. 5 is an exploded perspective view showing another embodiment of the flexible pipe insertion jig. FIG. 6 is a perspective view and a longitudinal section of the main part showing another embodiment of the flexible pipe insertion jig. Figure 7 is an exploded perspective showing a conventional example of a full Rekishiburu tube insertion jig view Figure 8 is a longitudinal sectional view showing a conventional example of a flexible tube insertion jig 9 when conventional flexible tube inserted state Explanatory drawing showing [signs]
DESCRIPTION OF SYMBOLS 1 Flexible pipe 1a Outward convex part 1b Inward convex part 5,6 Engagement part 11, 11c, 13 Holding means 15 Cord-like body
A Outer diameter of engaging part B Outer diameter of flexible tube

Claims (2)

An annular outward convex part projecting radially outward and an annular inward convex part projecting radially inward can be attached to the end of the flexible tube, and alternately mounted along the longitudinal direction, and A flexible tube insertion jig configured to be connectable with a cord-like body previously inserted into an insertion hole for installing the flexible tube in an inserted state,
By the engagement of the engaging portion that engages the outward convex portion or the inward convex portion inside the flexible tube, the flexible tube is formed to be attachable to the end of the flexible tube. The outer diameter is the same as or substantially the same as the outer diameter of the flexible tube, or smaller than the outer diameter of the flexible tube ,
The engagement portion is configured to include two engagement members provided on an outer peripheral surface with a plurality of ridges engaged with the outward convex portion and the inward convex portion inside the flexible tube,
The two engaging members are swingable around a pin along the direction in which the plurality of protrusions are arranged and are elastically biased in the diameter increasing direction, and approach each other against elastic force A flexible tube insertion jig provided in a state in which the flexible tube can be inserted into the flexible tube. The flexible tube insertion jig according to claim 1, wherein holding means is provided to hold movement of the engaging portion in the diameter increasing direction in a state where the engaging portion is moved in the diameter expanding direction .

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