JP5555059B2 - Flexible conduit leading tool - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a flexible conduit leading tool, and more specifically, a flexible conduit that inserts and protects a conductive wire and a communication wire in the construction of a reinforced concrete structure or a floor or wall of a structure. The present invention relates to a flexible conduit leading tool used by being attached to the tip of the flexible conduit when piping in a slab before installation.

  When passing a current-carrying wire or a communication wire through a reinforced concrete structure or a floor or wall of the structure, the current-carrying wire or the communication wire is inserted into a flexible electric wire tube (also referred to as a composite tube) that protects them. This flexible electric wire pipe is a corrugated pipe made of synthetic resin and having flexibility, and is piped to a predetermined position in the slab before placing concrete.

  However, the floors and walls constructed with reinforced concrete have rebars built in, and the flexible conduits are supplied and pushed into them, but the flexible conduits can be made of synthetic resin. Since it is a corrugated pipe having flexibility, its tip is easily caught on the reinforcing bar. That is, the flexible wire tube is transported to the site in a coiled state, and has a curl hook to be drawn out from the state, and it is difficult to smoothly move the tip straight forward, and it is easily caught on the rebar in the middle. (See FIG. 9).

  Accordingly, a piping guide member for solving such a problem has been proposed (Patent Document 1: Japanese Patent Laid-Open No. 2000-120922). The piping guide member includes a head portion that has an arcuate portion that rides on the distal end portion, and includes a connection portion to a conduit pipe and a connection portion to a rod member that is inserted into the conduit pipe on the proximal end side. It is a guide member for conduit pipe piping.

  However, in the case of this guide member for piping, the base end side is provided with a connecting portion to a conduit pipe formed with a plurality of steps, or a connecting portion with a rod member inserted into the conduit pipe In addition to the complexity of the structure, there is a problem that the operation of detaching the member from the conduit pipe cannot be easily and quickly performed. It does not contribute much to the efficiency of piping work in the slab.

JP 2000-120922 A JP 2002-186155 A

  As described above, the guide member intended to improve the efficiency of the piping work in the slab before the concrete placement of the flexible cable pipe, which has been conventionally proposed, has a complicated structure or can be easily attached to and detached from the flexible cable pipe. There was a problem that it could not be done quickly, and it did not contribute much to the efficiency of flexible conduit piping work. Therefore, the present invention provides a flexible conduit leading tool that has a simple configuration, is easy to handle, and can sufficiently contribute to the efficiency of piping work in the slab before the concrete placement of the flexible conduit. Let it be an issue.

The invention according to claim 1 for solving the above-described problems is a cylindrical main body in which a leading rod is connectable to one half side and an upper half of the other half side is opened to form a fitting opening, and the leading body The opening edge of the fitting opening extends horizontally from the middle of the end surface on the other half side, and then tilts to reach the upper surface of the cylindrical body. The mouth is a flexible conduit leading tool characterized by having a locking claw that is formed by partially bending inwardly at the edge of the end surface portion.

  In one Embodiment, the said latching claw is provided in three places of the both-sides upper part and lower end part of the said end surface part edge. The leading rod is a bar made of metal or resin and has a length capable of straddling at least two reinforcing bars before and after the traveling direction. The leading rod is detachable from the main body.

  The present invention is as described above, and the flexible conduit leading tool according to the present invention allows a leading rod to be connected to one half side and opens the upper half of the other half side to form a fitting opening. It is composed of a cylindrical main body and the leading rod, and the fitting opening has a locking claw formed by partially bending inwardly at the edge of the end surface portion, and is simply tilted. Can be attached to the flexible conduit simply by fitting the distal end of the flexible conduit to the fitting opening, and it is caught on the rebar in the course of travel by pushing the leading rod forward Since it is easy to advance to a predetermined position, there is an effect that greatly contributes to an improvement in efficiency of piping work in the slab before the concrete placement of the flexible electric pipe.

It is a front view which shows the structural example of the flexible conduit tube leading tool which concerns on this invention. It is a top view which shows the structural example of the flexible conduit tube leading tool which concerns on this invention. It is a left-right side view which shows the structural example of the flexible conduit tube leading tool which concerns on this invention. It is a front longitudinal cross-sectional view which shows the structural example of the flexible conduit tube leading tool which concerns on this invention. It is a figure which shows the structural example of the leading rod in the flexible conduit tube leading tool which concerns on this invention. It is a figure which shows the usage method (at the time of attachment) of the flexible conduit tube leading tool which concerns on this invention. It is a figure which shows the usage method (at the time of removal) of the flexible electric wire pipe leading tool which concerns on this invention. It is a perspective view which shows the use condition of the flexible conduit tube leading tool which concerns on this invention. It is a perspective view which shows the problem of the piping method of a flexible electric wire pipe.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1 to FIG. 3, the flexible conduit leading tool 1 according to the present invention allows a leading rod 10 to be connected to one half of the cylindrical main body 2, and the other half of the main body 2 The upper half is opened to form the fitting port 3 into which the distal end portion of the flexible conduit 20 is fitted.

  The leading rod 10 is a bar made of metal or resin, and has a length (for example, a length of about 1 m) that can straddle between the two reinforcing bars 25 at least in the traveling direction. Usually, the leading rod 10 is fixed to one half of the main body 2 by screwing into a female screw portion 4 formed inwardly from the end face thereof. The end surface on the side where the female thread portion 4 is formed is preferably a tapered surface 6 in order to avoid catching on the reinforcing bars 25 as much as possible.

  Usually, a plurality (three in the illustrated example) of locking claws 5 are formed on the edge of the end surface portion on the fitting port 3 forming side by partially bending inwardly. As will be described later, the locking claw 5 engages with the concave portion 21 of the corrugated flexible conduit 20, thereby preventing the flexible conduit 20 from coming off.

  The tip of the guide rod 10 is tapered to avoid catching the reinforcing bar 25 as much as possible, and a bulge 11 such as a spherical shape or a spindle shape is formed at the tip as required (see FIG. 5). . When the bulging portion 11 is provided, the leading end portion of the leading rod 10 is floated, so that it is less likely to be caught by the rebar 25 during the progression, and a smoother progression is possible.

  Since there are a plurality of types of flexible conduits 20 having different diameters, it is preferable to prepare a plurality of types of main bodies 2 having different diameters so as to correspond to each. In that case, the leading rod 10 can be made common.

  Next, a method for using the flexible conduit leading tool 1 according to the present invention will be described with reference to FIGS. First, in a state where the leading rod 10 is separated, the main body 2 is slightly inclined (lowering the locking claw 5 installation side) and is brought close to the flexible cable tube 20 (FIG. 6A), and in this state, the flexible cable tube The tip of 20 is inserted into the fitting port 3 (FIG. 6B). Thereafter, the main body 2 is returned to the horizontal state and aligned with the flexible conduit 20 so that each locking claw 5 can be engaged with the recessed portion 21 of the flexible conduit 20 (FIG. 6C )).

  By engaging the locking claw 5 with the recessed portion 21 in this way, the main body 2 and the flexible conduit 20 can be integrated easily and reliably, and then the flexible conduit 20 is moved horizontally. The flexible conduit 20 is not detached from the main body 2 even if it is pushed or pulled. Then, the leading rod 10 is screwed onto the female thread portion 4, and the piping preparation of the flexible conduit 20 is completed.

  The piping operation itself of the flexible conduit 20 is basically the same as that of the conventional case, and the flexible conduit 20 that has been wound up is rewinded from the piping drawing side into the slab before placing concrete. Meanwhile, the leading rod 10 is inserted at the head (see FIG. 8). At that time, since the leading guide rod 10 has a length that can be sufficiently straddled between the reinforcing bars 25 in the traveling direction, there is no possibility that the tip is lowered and caught by the reinforcing bars 25, and the flexible conduit 20 is bent and bent. Even if it exists, since the front-end | tip part of the flexible conduit 20 is firmly hold | maintained at the main body 2, there is no possibility of bending, and it is pushed forward one after another and advances.

  After the leading rod 10 has been advanced to a predetermined position in this way, the leading rod 10 can be pulled out to the lead-out portion of the flexible conduit 20 and the flexible conduit leading tool 1 can be operated in the reverse manner to the attachment. Remove from the flexible conduit 20. That is, first, the guide rod 10 is removed from the main body 2, and then the main body 2 is tilted to remove the locking claw 5 from the recess 21 (FIG. 7D). And the flexible electric wire tube 20 is extracted from the fitting port 3 by moving the main body 2 as it is (FIG. 7E).

  As described above, the flexible conduit leading tool 1 according to the present invention has a very simple configuration and is very easy to attach to and detach from the distal end of the flexible conduit 20. By attaching to the part, it is possible to easily and quickly carry out the piping work in the slab before placing the flexible electric cable 20 into the concrete, thereby making it possible to improve the efficiency of the work. It is useful for.

  Although the present invention has been described in some detail with respect to its most preferred embodiments, it will be apparent that a wide variety of different embodiments can be constructed without departing from the spirit and scope of the invention, the invention being defined by the appended claims. It is not restricted to the specific embodiment other than limiting in.

DESCRIPTION OF SYMBOLS 1 Flexible conduit | pipe leading tool 2 Main body 3 Insertion slot 4 Female thread part 5 Locking claw 6 Tapered surface 10 Leading rod 11 Swelling part 20 Flexible conduit pipe 21 Recessed part 25 Reinforcing bar

Claims (4)

A leading rod is connectable to one half side, and the leading half is formed of a cylindrical main body having an opening formed by opening the upper half of the other half, and the opening edge of the fitting port is the other After extending horizontally from the middle of the end surface on the half side, it is inclined to reach the upper surface of the cylindrical body, and the fitting opening is bent inward at the edge of the end surface portion. A flexible conduit leading tool having a locking claw formed in this manner.   2. The flexible conduit leading tool according to claim 1, wherein the latching claw is provided at three portions on both upper and lower ends of the edge of the end face portion.   The flexible conduit leading tool according to claim 1 or 2, wherein the leading rod is a bar made of metal or resin and has a length that can span at least two reinforcing bars before and after the traveling direction. The flexible conduit leading tool according to any one of claims 1 to 3, wherein the leading rod is detachable from the main body.

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