JP4180803B2 - Cable holder for in-pipe cables - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a cable holder for fixing and supporting a cable such as an optical fiber drawn into a pipe such as a sewer pipe on an inner wall of the pipe.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 8-103012 as a cable holder has a cable holding part that protrudes horizontally and has an attachment part into which an adhesive is inserted and a plunger pin is inserted, and the inner wall of a sewer pipe. An attachment portion is pushed into a drill hole drilled in the hole, and is fixed with an adhesive that is pushed out from the attachment portion by pushing a plunger pin. JP-A-2000-261924 discloses a screw portion. There is disclosed a cable holder that is formed in advance and has a reverse U shape that opens downward, has a claw protruding inwardly in the opening, and is attached to a sewer pipe in advance.
[0003]
[Problems to be solved by the invention]
Among the cable holders mentioned above, the latter cable holder that opens downwards has the advantage that the cable can be removed from the cable holder even if a radial shear force is applied to the tube due to an earthquake or the like, so that the cable is not damaged. However, it is not designed to be installed on existing sewer pipes, and when installing a new cable in addition to existing cables in the pipe, or connecting different types of cables, such as trunk lines and branch lines. When separately attaching to the cable holder separately, it is necessary to attach a new cable holder or a plurality of cable holders.
[0004]
In this regard, the former cable holder can be attached to an existing sewer pipe, and since it has multiple cable holders, a new cable is added and attached separately for each type of cable. Although it can be attached to the cable holder, the gap between the inner wall of the sewer pipe and the cable holder is narrow, making it difficult to hook the cable, and damage to the cable when radial shearing force is applied to the pipe due to an earthquake, etc. There is a risk of giving.
[0005]
An object of the present invention is to provide a cable holder that has a plurality of cable holding portions that open downward and can be attached to an existing sewer pipe by a single attachment operation.
[0006]
[Means for solving problems]
The invention according to claim 1 includes a plurality of substantially U-shaped cable holding portions that open downward, a holding fitting having a lateral direction, and a push-in attachment to a drill hole drilled in the inner wall of the sewer pipe through the holding fitting between the cable holding portions. In the cable holder of the in- pipe cable into which the plunger pin is inserted, the bottomed vertical hole formed in the anchor mounting portion from above is filled with an adhesive. The metal fittings are formed on the anchors so as to project obliquely upward on both sides of the anchors, and are formed with spring claws having an upper end portion having a reverse V-shaped cross section, and fitting holes formed in the holding metal fittings for fitting the claws. It is attached in a state in which it is prevented from rotating by a certain rotation stop means .
[0007]
According to the present invention, the holding fitting having a plurality of cable holding portions that open downward can be fixed to the inner wall of the sewer pipe simply by pushing the attachment portion of the anchor into the inner wall of the sewer pipe and bonding and fixing the attachment portion.
[000 8 ]
Oite the present invention also insert the retaining bracket to anchor against the toe into the fitting holeゝpushed, pushed in the direction of nail hole edge of the fitting hole is closed inwardly, hole edge claw upper portion When the bottom of the claw is reached by sliding the claw, the claw is restored and opened outward, and is locked to the hole edge to prevent the support fitting from coming off. Therefore, the anti-rotation means of the present invention functions to prevent the retaining bracket from rotating and coming off.
[00 09 ]
DETAILED DESCRIPTION OF THE INVENTION
The cable holder shown in FIG. 1 includes a holding metal fitting 2 having cable holding portions 1 on both the left and right sides, and an anchor 3 for attaching the holding metal fitting 2 to a sewer pipe (not shown) at the center. The holding metal fitting 2 is substantially C-shaped. An outer metal fitting 4 and an inner metal fitting 5 are formed, and both metal fittings 4 and 5 are formed with rectangular holes constituting rotation stopping means, although not shown in the center. When the holes are matched and combined, the cable holding portion 1 is formed on both the left and right sides.
[001 0 ]
The anchor 3 is made of resin, and has a support portion 3a of the holding metal fitting 2 at an intermediate portion, a screw portion 3b as a mounting portion having a notch (not shown) on the top, and a bottomed vertical hole (not shown). The portion 3a has a circular cross-section on the lower side and a rectangular cross-section on the upper side, and the upper side forms a rotation stop means together with the rectangular hole, and the upper side is fitted and held in the rectangular holes of the metal fittings 4 and 5. The metal fitting 2 is prevented from rotating, and the holding metal fitting 2 fitted to the upper portion of the support portion 3a is supported by the lower portion of the circular cross section.
[001 1 ]
The vertical hole formed above the anchor is filled with an adhesive, and the plunger pin 6 is inserted, and when the plunger pin 6 is pushed in, the filled adhesive is pushed out. .
[001 2 ]
The cable holder shown in FIG. 2 has a structure in which four cable holders 12 as cable holding portions in which the holding metal fitting 11 forms an Ω (ohm) shape are connected to the connecting metal fitting 13 at regular intervals. A rectangular hole (not shown) that constitutes the rotation stopping means is formed in the central portion.
[001 3 ]
The anchor 14 has the same structure as that of the anchor 3 and is configured to stop and support the holding metal 11 in the same form as the above-described holding metal 2. In the figure, 15 is the same plunger pin as the plunger pin 6.
[001 4 ]
In the cable holder shown in FIG. 3, a cable holder 23 as a pair of cable holders having an Ω (ohm) shape in which the holding metal 21 has reinforcing ribs 22 as shown in FIG. It has a connected structure, and a circular portion 25 into which a plunger pin, which will be described later, is fitted in the central portion of the connecting bracket, and a fitting that constitutes a rotation stop means by communicating with the circular portion 25 on the left and right of the circular portion 25 The hole which consists of the fitting part 26 as a hole is formed.
[00 15 ]
The anchor 25 is made of resin, has an upper portion with a small diameter and a step with the lower portion, has a split groove (not shown), has a screw cut on the outer periphery, and has a bottomed vertical hole from above. The longitudinal hole is filled with an adhesive, and the plunger pin 28 is inserted.
[00 16 ]
The lower part, which forms a step with the upper part, supports the holding metal fitting 21 fitted to the upper part, and on both sides, as shown in detail in FIG. is doing. The claw 31 is flexible and has a hook shape with a V-shaped cross section at the upper end. The circular portion 25 of the hole formed in the connecting bracket 24 is inserted into the anchor upper portion, and the fitting portion 26 is a claw. When the claw 31 is pushed in such a direction as to fit the claw 31, the claw 31 is pushed inward at the hole edge of the fitting portion 26. And is retained at the hole edge to prevent the retaining bracket 21 from coming off together with the rotation.
[00 17 ]
The cable holder shown in FIG. 6 has a substantially U shape that is entirely made of resin and opens downward, and has a cable holder portion 36 having a claw 35 projecting at the entrance, and a small-sized cable holding portion of the same shape on both sides thereof. 37, and a mounting portion 39 protruding from the holding device 38 and attached to the sewer pipe 41. The mounting portion 39 is provided with a split groove, filled with an adhesive on the top, and a plunger. It has a bottomed vertical hole (not shown) into which the pin 42 is inserted.
[00 18 ]
【The invention's effect】
According to the present invention, the holding bracket can be fixed to the inner wall of the sewer pipe simply by pushing the anchor mounting part into the drill hole drilled in the inner wall of the sewer pipe, and a plurality of cable holding parts opened downward can be attached once. Can be attached to existing sewer pipes, and since multiple cable holders are always attached in the same direction, there is no hindrance to the cable insertion by the robot. There are effects such as retaining.
[Brief description of the drawings]
FIG. 1 is a front view of a cable holder according to the present invention.
FIG. 2 is a front view of another example of a cable holder according to the present invention.
FIG. 3 is a front view of still another example of the cable holder according to the present invention.
4 is a plan view of a holding fixture of the cable holder shown in FIG. 3. FIG.
5 is an enlarged front view of the main part of the anchor of the cable holder shown in FIG.
FIG. 6 is a front view of another example of a cable holder according to the present invention.
[Explanation of symbols]
1 .. Cable holder 2, 11, 21 .. Holding bracket 3, 14, 27. Anchor 4. Outer bracket 5. Inner bracket 6, 15, 28, 42 Plunger pins 12, 23, 36 37 ·· Cable holders 13 and 24 · · Connection fitting 25 · · Circular portion 26 · · Fitting portion 31 and 35 · · Claw 38 · · Holder 39 · · Mounting portion 41 · · Sewer pipe

Claims (1)

A plurality of cable holding portions that open downward, a holding bracket having a lateral direction, and an anchor having a mounting portion that is pushed into and attached to a drill hole drilled in the inner wall of a sewer pipe through the holding fitting between the cable holding portions. In a cable holder for an in- pipe cable into which a bottomed vertical hole formed in the mounting portion from above is filled with an adhesive and into which a plunger pin is inserted , the holding bracket is inclined to both sides of the anchor. Mounted in a state of being prevented from rotating by a claw made of a spring body projecting upward and having an upper end with an inverted V-shaped cross section, and a rotation preventing means formed in the holding metal fitting, and a fitting hole into which the claw is fitted. A cable holder for an in-pipe cable .

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