JP2652003B2 - Optical cable movement prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable movement preventing device for preventing movement of an optical cable provided in a conduit buried underground, and more particularly, to a device for controlling the movement of an inner tube in the outer tube in the longitudinal direction of the outer tube. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable movement preventing device provided with a tube plug fixing device that prevents movement of a tube plug provided in an outer tube with respect to the outer tube while preventing the tube plug from being moved.

[0002]

2. Description of the Related Art As a conventional optical cable movement prevention device, there has been proposed a form in which the movement of an inner tube is prevented without the inner tube coming out of a manhole. As an example, a prevention plate having the same diameter as the inner diameter of the inner pipe is attached to the side of the pipe plug (or water stop plug),
When the inner pipe tries to escape to the outside of the water stop plug, it is locked by a prevention plate having the same diameter as the inner diameter of the inner pipe attached to the side of the pipe plug to prevent movement, and furthermore, to prevent the inner pipe from moving inside. There has been proposed a movement preventing device in which a screw is nailed to a portion to prevent movement of a pipe plug.

[0003] In such a conventional optical cable movement prevention device, in actuality, it is difficult to cut the inner tube so that the inner tube does not come into the manhole at the time of construction at the site. As a result, the expansion and contraction may be repeated, and in some cases, the inner pipe may be sucked into the outer pipe from the manhole, which may cause difficulty in laying the optical cable again.

[0004] Accordingly, an object of the present invention is to solve the above-mentioned problems by providing a state in which a part of an inner tube projects from an outer tube;
That is, there is provided an optical cable movement preventing device that prevents movement of an optical cable in an inner tube by preventing movement of the inner tube on a side where the inner tube is pushed out of the outer tube while being out of the manhole. It is in.

[0005]

In order to achieve the above object, an optical cable movement preventing device according to the present invention sets the position of an inner tube in an outer tube and moves the inner tube on the side pushed out in the longitudinal direction of the outer tube. And a pipe plug fixing device connected to one end of the movement preventing means and preventing a pipe plug provided in the outer pipe from being detached from the outer pipe.

[0006]

According to the above construction, the optical cable movement prevention device of the present invention is capable of repeatedly moving the inner pipe, repeating the expansion and contraction of the inner pipe due to a temperature change, from the inside of the manhole to the outer pipe in the pipe provided in the manhole. It effectively solves problems such as the phenomenon of being sucked in and the difficulty in construction in which the inner pipe must be cut so as not to protrude into the manhole.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of a conventional pipeline provided with an outer tube and an inner tube for laying an optical cable.

As shown in FIG. 1, an inner pipe (11) is provided in an outer pipe (7), and finally a position for maintaining the interval between the inner pipes (11) is set. A pipe plug (1) provided with a waterproof rubber for blocking the seeping water from flowing into the manhole is provided in the outer pipe (7). The principle of use of pipe plug (1) is bolt (2)
When the upper plate (4) and the lower plate (5) approach each other (see FIG. 4), the waterproof rubber (6) is tightened, and the circumferential portion between the outer tube (7) and the waterproof rubber (6) is tightened. Expands, and can block water while increasing the frictional force. But,
When the movement of the inner pipe (11) occurs, the pipe plug inner pipe hole (3)
While the inner pipe (11) laid through the inner pipe (1) moves forward, the pipe plug (1) also cannot bear the moving force and the inner pipe (1)
As in 1), it comes out ahead.

FIG. 2 is a perspective view showing an optical cable movement preventing device according to an embodiment of the present invention. FIG. 2 shows the inner shell (8) connected to the base plate (9) and the pipe plug (1). The base plate (9) is connected to the lower part of the inner pipe frame (8), and the pipe plug (1) is provided with a water-stop rubber (6) located at the center and the water-stop rubber (6) as a center. It is composed of an upper plate (4) located at the upper part and a lower plate (5) located at the lower part.

The connection between the base plate (9) and the inner tube frame (8) can be fastened by a connecting member, or the base plate (9) and the inner tube frame (8) can be formed integrally. At the other end of the inner tube frame (8) to which the base plate (9) is connected, a prevention unit (13) is mounted.

The connection between the base plate (9) and the pipe plug (1) is performed by fixing the fixing bolt (2) to a fixing bolt insertion groove () formed in each part of the base plate (9) and the pipe plug (1). 1
0) into the fixing bolt insertion groove (1) of the base plate (9).
0) This is achieved by connecting a fixing nut (12) to a fixing bolt (2) projecting outward. At this time, when the fixing nut (12) connected to the fixing bolt (2) is firmly adhered to the fixing bolt (2), the waterproof rubber (6) located at the center of the pipe plug (1) is moved in the radial direction. As a result, the pipe plug (1) comes into close contact with the outer pipe (7) in the radial direction in the outer pipe (7) (see FIG. 5), thereby preventing detachment from the outer pipe (7).

FIG. 3A is a perspective view showing in detail the preventer 13 shown in FIG. Referring to FIG. 3 (A), the prevention tool (13) includes a prevention flange (14) forming a curved portion and an inner pipe frame groove (15 ′) formed by the prevention flange. The inner diameter of the inner pipe frame groove (15 ') is formed to be the same size as the inner diameter of the inner pipe (11),
The inner pipe (11) which comes out through the pipe plug inner pipe hole (3) is locked by the prevention flange (14) and is prevented from moving. In addition,
It should be noted that if the inner diameter of the inner pipe frame groove (15 ') is smaller than the outer diameter of the inner pipe (11), the movement of the inner pipe (11) can be prevented as described above. It is.

FIG. 3B is a perspective view showing the base plate 9 shown in FIG. 2 in detail. The base plate (9) shown in FIG. 3 (B) is attached to the end of the inner pipe frame (8) in the direction of the pipe plug (1), and the fixing bolt insertion groove of the pipe plug (1) shown in FIG. A wing portion (19) in which a fixing bolt insertion groove (10) of the same size is formed at the same position as (10), and an inner pipe frame groove (15) having the same size as the outer diameter of the inner pipe. It is configured.

FIG. 4 is a perspective view showing in detail the state of connection of the protection device (13), the base plate (9) and the inner tube frame (8) shown in FIG. In FIG. 4, the fixing bolt insertion groove (10) of the base plate (9) is formed to have the same size as the fixing bolt insertion groove (10) formed in the pipe plug (1), and the base plate (9) is fixed. Align the bolt insertion groove (10) with the fixing bolt insertion groove (10) formed in the pipe plug (1), and hold the fixing nut (1) in a state sandwiched by the fixing bolt (2).
When 2) is combined, the base plate (9) is attached to the pipe plug (1) and becomes integral with the pipe plug (1).

The inner tube frame 8 serves to maintain and maintain a certain length by projecting the inner tube 11 into the manhole. In the conventional optical cable movement prevention device, the inner pipe (11) had to be cut so as not to enter the manhole at the time of construction, but this involved considerable difficulty in construction, and furthermore, the inner pipe (11) was In some cases, expansion and contraction are repeated due to a temperature change, and in some cases, a phenomenon occurs in which the inner pipe (11) is sucked into the outer pipe from the manhole, and thereafter, it becomes difficult to lay the optical cable.

Therefore, if the inner pipe (11) protrudes by a certain length into the manhole, it is possible to effectively cope with the above-mentioned problems caused by the movement of the inner pipe (11).

FIG. 5 is a perspective view showing an optical cable movement preventing device according to a second embodiment of the present invention. The optical cable movement prevention device shown in FIG. 5 is a modification of the tube plug fixing device included in the optical cable movement prevention device of the first embodiment shown in FIG.

Referring to FIG. 5, the movement of the inner tube (11) included in the optical cable movement preventing device according to the second embodiment of the present invention is performed by the prevention flange (14) attached to the end of the inner tube frame (8). Since the movement of the inner pipe (11) is prevented, the movement preventing device according to the present invention and the pipe plug (1) relatively receive the moving force of the inner pipe (11). There is a risk that the tube plug (1) connected to the outer tube (7) will be detached from the outer tube (7).

In order to prevent such a tube plug (1) from being detached from the outer tube (7), a tube in which a washer (17) is connected to a terminal end circumference of the outer tube (7) by a prevention bolt (16). A plug fixing device is provided. Here, since the washer (17) has a diameter larger than the thickness on the terminal circumference of the outer tube (7), the base plate (9) located inside the outer tube (7) is detached from the outer tube (7). Will prevent it from coming.

FIGS. 6 to 9 show a third embodiment of the optical cable movement preventing device in which the tube plug fixing device is modified from the first embodiment of the optical cable moving preventing device according to the present invention.

FIG. 6 is a perspective view showing an optical cable movement preventing device according to a third embodiment of the present invention. The third shown in FIG.
The optical cable movement prevention device of the embodiment includes a modified tube plug fixing device different from the tube plug fixing device shown in FIG.

FIG. 7 shows the pipe plug (1) for explaining the connecting process of the pipe plug (1) shown in FIG.
FIG. 8 is an exploded perspective view of the tube plug fixing device (18) for explaining a connecting process of the tube plug fixing device (18) shown in FIG.

Referring to FIGS. 6 to 8, the pipe plug fixing device includes a fixing bolt (2) of a connecting member for connecting a conventional pipe plug (1) and a fixing bolt insertion groove (10).
The feature is that the work on site has been facilitated while utilizing as is.

Further, the pipe plug fixing device (18) includes:
A fixing nut (19) fixed to the inside of the outer tube (7) and a fixing nut (19) for rotating the fixing tool by coupling with a screw portion formed on an upper stage of the fixing tool (20) when rotating by a certain angle.
a).

The fixing device (20) includes a wing (21) located at the lowermost portion of the fixing device (20), a reinforcing flange (22) extending integrally with the upper portion of the wing (21), and The main body part (23) extends upward with a diameter smaller than the diameter of the reinforcing flange (22).

The wing (2) located at the bottom of the fixture (20)
1) has a tip (24) formed with a sharp blade so that it can bite into the inner wall of the outer tube. The overall shape of the wing (21) is an ellipse with a protruding tip (24).

The reinforcing flange (22) located at the center between the wing (21) and the main body (23) transmits the rotational force transmitted from the main body (23) to the lower wing ( 21) It has a constant thickness so that transmission can be performed without hindrance, and the shape of the circumferential portion from the upper part to the lower part is formed in a bent shape.

The main body (23) extending upward from the reinforcing flange (22) has an overall diameter smaller than the diameter of the reinforcing flange (22), and has a fixing bolt insertion groove (2) inside.
6) penetrates so that the fixing bolt (2) can be inserted. And a screw part in which a screw was formed is provided in a part of the main part (23) upper stage outside.

A fixing nut (19a) coupled to the upper thread portion of the main body (23) serves to rotate the fixing tool (20) and fix the same in the outer tube (7).

Next, the connection relationship of the optical cable movement preventing device according to the third embodiment of the present invention having the above structure will be described.

The fixture (20) of the pipe plug fixing device (18) is provided at a lower portion of the base plate (9) and an upper portion of the upper plate (4) of the pipe plug (1). The tip (24) of the wing (21), which is completely inserted between the plate (9) and the upper plate (4) of the pipe plug (1) and has a blade formed by rotation of the fixture (20). ) Is formed in the lower part of the wing portion of the base plate (9) in the thickness direction so that the fixing member insertion groove (25) can move smoothly. At this time, a fixing bolt insertion groove (26) formed through the inside of the fixing tool (20).
Are aligned with the fixing bolt insertion grooves (10) formed in the respective parts constituting the pipe plug (1), and the main body (23) of the fixing tool (20) is placed on the pipe plug upper plate (4). The main body (23) is made to protrude from the main body (23). At this time, the main body part connecting groove (2) formed at the lower part in the thickness direction of the base plate (9) to which the main body part of the fixture (20) is bonded.
7) has a larger diameter so that the body (23) of the fixture (20) can pass through.

With the fixture (20) of the pipe plug fixing device (18) installed in the base plate (9), the base plate attached to the lower stage of the pipe plug (1) and the inner tube frame (8) (9)
Of the fixing bolt (2) so as to pass through the fixing bolt insertion groove (10). At this time, the fixing bolt (2) passes through the fixing bolt insertion groove (10) of the pipe plug (1) and is fixed to the lower part of the base plate (9).
Through the fixing bolt insertion groove (26), and then projecting to the outside of the base plate (9).
3) Tighten the fixing nut (19a) to the upper thread part, and then insert the fixing bolt insertion groove (10) of the pipe plug (1),
A fixing bolt insertion groove (26) penetrating the center of the fixture (20) mounted inside the base plate (9) and a fixing bolt insertion groove (27) of the base plate (9) protrude therethrough. A fixing nut (12) coupled with the fixing bolt (2) is brought into contact with an upper portion of the fixing nut (19a).

The fixing nut (12) connected to the tip of the fixing bolt (2) serves to connect the pipe plug (1) and the base plate (9) as a whole. The fixing nut (19a) coupled to the upper thread portion of the main body (23) of the fixing tool (20) protruding above the upper portion of the fixing device (20) is fixed in a state of being completely in contact with the screw portion formed on the upper portion of the main body portion (23). It rotates together with the fixture (20), thereby rotating the lower wing (21) of the fixture (20) and fixing the pipe plug (1) to the outer pipe (7). On this occasion,
The fixing bolt (2) penetrating the pipe plug (1), the fixing tool (20) and the base plate (9) becomes a center of rotation of the fixing tool (20) by the rotation of the fixing nut (19a).

FIG. 9 is a perspective view showing a state in which the optical cable movement preventing device according to the third embodiment of the present invention shown in FIG. 6 is provided on the outer tube.

In the drawing, even when the cable movement preventing device is provided on the outer tube (7), the fixing nut (19a) of the tube plug fixing device (18) projecting outside the outer tube (7) is rotated. Then, the tip (24) of the fixture (20) attached to the base plate (9) is cut into the inner wall of the outer tube (7), thereby connecting the pipe plug connected to one end of the cable movement prevention device. (1) is easily fixed to the inner surface of the outer tube (7), and detachment from the outer tube (7) is prevented.

[0036]

As described above, the position of the inner tube in which the optical cable is received is set in the outer tube to prevent the inner tube from being pushed out in the longitudinal direction of the outer tube on the side where the inner tube is pushed out. The optical cable movement according to the present invention comprising a movement prevention device, and a tube plug fixing device for preventing a tube plug provided in the outer tube connected to one end of the movement prevention device from being detached from the outer tube. The prevention device repeats the movement of the inner pipe and the expansion and contraction of the inner pipe due to temperature change in the pipe provided in the manhole, the phenomenon of being sucked into the outer pipe from the inside of the manhole, and preventing the inner pipe from entering the manhole. It is possible to effectively solve problems such as construction difficulties that require cutting the inner pipe.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional conduit provided with an outer tube and an inner tube for laying an optical cable according to the related art.

FIG. 2 is a perspective view showing an optical cable movement prevention device according to an embodiment of the present invention.

FIG. 3A is a perspective view showing a detail of the protection device shown in FIG. 2; (B) is a perspective view showing the base plate shown in FIG. 2 in detail.

FIG. 4 is a perspective view showing a combined state of the protection device, the base plate, and the inner tube frame shown in FIG. 2;

FIG. 5 is a perspective view showing an optical cable movement prevention device according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing an optical cable movement prevention device according to a third embodiment of the present invention.

FIG. 7 is an exploded perspective view for explaining a connecting process of the pipe plug and the base plate shown in FIG. 6;

FIG. 8 is an exploded perspective view for explaining a connecting process of the pipe plug fixing device shown in FIG. 7;

FIG. 9 is a perspective view showing a state in which the optical cable movement preventing device according to the third embodiment of the present invention shown in FIG. 8 is provided on an outer tube.

[Description of Signs] 1 Pipe plug 2 Fixing bolt 3 Inner tube hole 4 Upper plate 5 Lower plate 6 Waterproof rubber 7 Outer tube 8 Inner tube frame 9 Base plate 10, 26 Fixing bolt insertion groove 11 Inner tube 12, 19a Fixing nut DESCRIPTION OF SYMBOLS 13 Prevention tool 14 Prevention flange 15 Inner frame groove 15 'Inner frame structure (of prevention device) 16 Prevention bolt 17 Washer 18 Pipe plug fixing device 20 Fixture 21 Wing 22 Reinforcement frame 23 Main body 24 Tip 25 Fixture Insertion groove 27 Body connection groove

Claims (12)

(57) [Claims] An optical cable movement prevention device for preventing movement of an optical cable received in an inner tube by preventing movement of an inner tube received in an outer tube in a pipeline, wherein the plurality of optical cables receive optical cables in the outer tube . Set the position of the inner tube and set several inner tubes inside so as to be fixed in the outer tube.
Is formed, and the outer circumferential surface is inside the outer tube.
One end is fixed to the tube plug to support each inner tube with the tube plug contacting the surface portion ,
The other end portion is fixed to the other end portion of the inner tube frame and the inner tube frame protruding outside the end portion of the outer tube by a predetermined length.
And a tube plug for preventing the tube plug from being detached from the outer tube.
Characterized in that it comprises a lug fixing means, the optical cable movement preventing device. 2. The end of the inner tube frame is connected to the tube plug.
The base plate for fixing the part is attached.
The base plate has a wing portion where a fixing bolt insertion groove is formed, and
The optical cable movement prevention device according to claim 1, further comprising: an inner pipe frame groove through which the inner pipe passes . 3. The optical cable movement preventing device according to claim 1 , wherein said tube plug fixing means comprises a fixing bolt mounted on a peripheral end portion of the outer tube and a washer. 4. The pipe plug fixing means includes a wing portion having a tip formed with a blade on one side surface, a reinforcing flange extending integrally with the upper portion of the wing portion, and a reinforcing flange extending above the reinforcing flange. A screw is formed on the outer circumference of the upper part, and a main body part through which a fixing bolt insertion groove penetrates in an inner central part, and an outer part of the upper part of the main body part
The optical cable movement prevention device according to claim 1 , further comprising: a fixing nut coupled to a screw portion formed on a side to rotate the main body . 5. The mounting of the base plate on the pipe plug.
Only it is characterized by being made by fixing bolts and fixing nuts, optical cable movement preventing device according to claim 2. 6. the inner diameter of the pipe frame groove formed in said baseplate and the inner tube frame, characterized in that it is the same as the outer diameter of the provided in the outer tube in a tube, according to claim 2 Optical cable movement prevention device. 7. The optical cable movement prevention device according to claim 2 , wherein the base plate and the inner tube frame are fastened by a separately provided coupling member. 8. The optical cable movement prevention device according to claim 2 , wherein the base plate and the inner tube frame are formed integrally. 9. The optical cable movement prevention device according to claim 1, wherein an inner diameter of the inner tube frame groove formed by the prevention portion is formed to have the same size as an outer diameter of the inner tube. 10. The optical cable movement prevention device according to claim 2, wherein the fixture of the tube plug fixing means is located in a base plate above the upper plate of the tube plug. 11. The fixture insertion groove according to claim 2 , wherein a fixture insertion groove is formed at a lower part in a thickness direction of the base plate located at an upper part of the pipe plug so as to facilitate insertion of the fixture. Optical cable movement prevention device described in <br/>. 12. The optical cable movement prevention device according to claim 4 , wherein the entire shape of the wing portion has an elliptical shape with a protruding tip portion.