JPH0414722Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an improvement of a column mount for attaching a sending device to a column for laying an optical fiber cable overhead.

(Technical background of the invention) The present applicant previously proposed a cable feeding device suitable for laying optical fiber cables with poor mechanical strength underground in conduits etc.
145773). That is, this cable sending device has a structure in which endless belts are arranged in parallel to be wound between a driving pulley and a driven pulley, and the optical fiber cable to be sent out is held between these endless belts at a predetermined speed. This makes it possible to lay optical fiber cables with poor mechanical strength while applying a predetermined tension.

Incidentally, recently there has been a demand for optical fiber cables to be installed overhead in the same way as conventional communication cables. However, if a winch simply pulls the extension wire connected to the optical fiber cable via rollers supported by the messenger wire as in conventional communication cables, a large tension will be applied to the optical fiber cable, which is undesirable. do not have.
Therefore, the applicant attached a pillar mount to the pillar,
The optical fiber cable feeding device is placed and fixed on this pedestal, and the optical fiber cable is fed out.
We proposed a method of extending the optical fiber cable, thereby making it possible to lay the optical fiber cable while applying a predetermined tension.

In such a pillar mount, in order to facilitate the installation work, it is necessary to tilt and position the optical fiber cable sending device at an arbitrary angle. It is desirable to have a structure that allows for arbitrary adjustment.

Therefore, the present applicant further constructed a support body that supports the pedestal main body on a pillar from a support pipe and a sliding member, and made the sliding member slide so as to be able to protrude from the support pipe, thereby increasing the inclination angle of the gantry main body. We proposed a column mount with a structure that adjusts the That is, as shown in FIG. 4, the support body 3 for supporting the gantry main body is composed of a support pipe 20 and a sliding member 19 that is slidably supported by the support pipe 20. The inclination angle of the gantry body is arbitrarily set depending on the amount of protrusion of the member 19 from the support pipe 20.

By the way, in the sliding member 19, the fixing pin 21, which is radially penetrated through the annular portion 20A provided at the end of the support pipe 20, is inserted into the positioning hole 19a provided along the longitudinal direction of the sliding member 19. It is positioned and fixed by inserting it into the

(Problems in the Background Art) However, in order to insert the fixing pin 21 into the positioning hole 19a in this way, the through hole 21a for passing the pin 21 of the annular portion 20A and the positioning hole 19a are required. They must be matched reliably, and therefore it takes a lot of effort to position and fix the sliding member. Further, since the fixing pin 21 is separate from the support pipe 20, there is a risk that it may fall or be lost during the positioning work of the sliding member.

(Purpose of the invention) The purpose of the invention is to provide a pillar for an optical fiber cable delivery device that allows the positioning work of the fixing pin of the sliding member to be performed easily and easily, and also prevents the fixing pin from falling or being lost. The objective is to provide a stand for

(Summary of the invention) In this invention, the fixing pin that fixes the sliding member to the support pipe for setting the inclination angle of the gantry body is housed in a holder that protrudes in the radial direction at the tip of the support pipe so that it cannot be removed. , characterized in that a coil spring disposed within the holder applies a pressing force to the fixing pin in the radial direction of the support pipe.

(Embodiments of the invention) Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

FIG. 2 shows a column mount for an optical fiber cable delivery device according to the present invention. This pedestal includes a pedestal main body 2 and its support body 3, which are arranged at intervals in the vertical direction of a pillar 1 formed in a tapered shape. Mounting brackets 4 and 5 are provided on one end side of the gantry main body 2 and the support body 3, and fixing members 6 and 7 are attached to these brackets 4 and 5, respectively. These fixing members 6 and 7 are entirely curved along the circumferential surface of the column 1, and a holder 8 is pivotally supported at one end of the fixing members 6, 7, and a chain 9 is clamped to this holder 8 so as not to be able to come off. Each fixing member 6,
A screw shaft 10 is pivotally supported at the other end of the column 1 so as to protrude substantially tangentially to the circumferential surface of the column 1 . This screw shaft 1
A tightening handle 11 is screwed onto the handle 1, and the other end of a chain 9 that is wound around the circumferential surface of the column 1 is connected to the handle 11. Therefore, when the handle 11 is turned and moved in a direction approaching the fixing members 6 and 7, the chain 9 reduces in diameter and tightens the circumferential surface of the column 1, so that the fixing members 6 and 7 are fixed to the column 1. be done.

One end side of the gantry main body 2 is swingably supported by the mounting bracket 4 by screwing a threaded portion of a handle 13 into a pivot shaft 12. A clamp 14 for fixing the feeding device 15 (see FIG. 3) is fixed on the gantry main body 2. This clamp 14
is equipped with a fixed side clamp member 14a and a movable side clamp member 14b, and as shown in FIG.
The lower plate and the like are clamped and mounted on the gantry main body 2 by b. A mounting member 18 provided at the other end of the support body 3 by screwing a threaded portion of a handle 17 onto a pivot shaft 16 is pivotally supported at the other end of the gantry main body 2. Mounting member 18 of support body 3
is fixed to the tip of the sliding member 19. This sliding member 19 is slidably held within the support pipe 20. This support pipe 20 is attached to an angle member 25 on the pillar 1 side. The angle member 25 is attached to the mounting bracket 5 via a hinge 22.

Now, at the tip of the support pipe 20, as shown in FIG. 1, a thick annular portion 20A is provided. This annular portion 20A includes a cylindrical holder 2 that protrudes in the radial direction of the support pipe 20.
3 is provided. Further, the annular portion 20A is provided with a through hole 20a that communicates with the holder 23 and penetrates in the thickness direction. On the other hand, sliding member 1
A plurality of positioning holes 19a are provided on the circumferential surface of the housing 9 along the longitudinal direction. A fixing pin 21 is housed within the holder 23. This fixing pin 21 has a knob 21a formed in a portion protruding from the holder 23, and a portion located inside the holder 23 is formed of a small diameter portion 21b and a large diameter portion 21c. The knob 21a is formed to have a large diameter to prevent it from entering the holder 23. A coil spring 24 is arranged within the holder 23. One end of the coil spring 24 is engaged with the stepped portion of the large diameter portion 21c of the fixing pin 21, and the other end is engaged with the inner wall surface of the holder 23. Therefore, a pressing force is constantly applied to the fixing pin 21 by the coil spring 24 in the radial direction of the support pipe 20, that is, in the direction of penetrating the through hole 20a of the annular portion 20A. When the coil spring 24 is locked to the large diameter portion 21c of the fixing pin 21 in this manner, the fixing pin 21 will not come out of the holder.

Now, in order to change the inclination angle of the column mount of the optical fiber cable sending device according to the present invention, the first step is to
As shown by the dotted line in the figure, the knob 2 of the fixing pin 21
1a against the elastic force of the coil spring 24, pull out the large diameter portion 21c from the positioning hole 19a of the sliding member 19, and make the sliding member 19 protrude or push in from the support pipe 20, thereby removing the gantry main body. 2 to the desired tilt angle. Next, release the knob 21a of the fixing pin 21, and
the positioning hole 19a near the annular portion 20A of the sliding member 19.
slide member 1 in the direction in which it passes through the through hole 20a position.
9. Slide it slightly. In this case, since the fixing pin 21 is given a pressing force in the direction of penetrating the through hole 20a by the spring 24, when the nearby positioning hole 19a is aligned with the through hole 20a, the large diameter portion 21c of the fixing pin 21 will automatically open the through hole 20
inserted into a. Therefore, the gantry main body 2 can be tilted and held at a desired angle.

After tilting the gantry main body 2 at a desired angle in this way, as shown in FIG. An optical fiber cable (not shown) is held between the belts 15a, and is fed out or pulled under a predetermined tension by these belts 15a, 15a, and is extended between the columns 1.

In the above embodiment, an enlarged diameter portion is provided on the knob 21a side of the fixing pin 21, and even if this enlarged diameter portion is locked to the inner wall surface of the holder 23, the fixing pin 21 is prevented from coming off from the holder 23. be able to.

(Effects of the invention) According to the invention, the fixing pin is housed in the holder of the support pipe so that it cannot be removed, and a coil spring is arranged in this holder, and the coil spring pushes the support pipe in the radial direction of the fixing pin. By applying pressure, simply by sliding the sliding member that is slidably attached to the support pipe, the fixing pin is inserted into the positioning hole provided along its longitudinal direction, and the pressing force of the coil spring is applied. can be inserted automatically. Therefore, the positioning and fixing work of the sliding member can be easily performed. Furthermore, since the fixing pin is housed in the holder so that it cannot be removed, there is no chance of the fixing pin being dropped or lost during work.

[Brief explanation of the drawing]

Figure 1 is an enlarged cross-sectional view of the main parts of the present invention;
Fig. 2 is an exploded perspective view showing the pillar mount according to the present invention attached to a pillar, Fig. 3 is a front view showing the cable feeding device mounted on the pillar mount of the invention, and Fig. 4. FIG. 2 is a sectional view showing a conventional sliding member fixing structure. 2... Frame main body, 19... Sliding member, 19a...
...Positioning hole, 20...Support pipe, 20A...
...Annular portion, 20a...Through hole, 21...Fixing pin, 23...Holder, 24...Coil spring.

Claims (1)

[Scope of utility model registration request] A pedestal main body, one end of which is swingably supported by a pillar for aerial cable installation, on which an optical fiber cable sending device is placed and fixed, and one end of which is swingably supported by the pillar below the gantry main body. It comprises a support pipe, and a sliding member that is slidably fitted into the other end of the support pipe and whose tip is pivotally supported by the other end of the gantry main body, and the sliding member is fitted along the longitudinal direction. A plurality of positioning holes are provided, and a fixing pin penetrating radially at the other end of the support pipe is inserted into one of the holes to position and fix the optical fiber. A holder for a pillar of a cable feeding device, which protrudes radially from the other end of the support pipe, and includes a holder in which the fixing pin is housed in a manner that cannot be removed; A column mount for an optical fiber cable delivery device, comprising a coil spring that applies a pressing force in the radial direction of the support pipe to the fixing pin to be inserted into any of the positioning holes.