JPH1118261A - Cable box and method for laying cable box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of the laying work of a cable box for a group of supplementary pipes which already have been constructed and to realize a good environment for the work. SOLUTION: A cable box 1, a structure which coves supplementary pipes 6 set in a given arrangement to form a group of the supplementary pipes through which cables are passed, is made up of a receiving channel 4 having the cross section of a roughly 'U'-shape, whose inside is provided with heat insulating materials facing both sides and bottom surface of the group of the supplementary pipes, and a covering channel 3 having the cross section of a rough inverted 'U'-shape, whose inside is provided with heat insulating materials facing the top surface of the supplementary pipes. Here, the receiving and covering channels 3, 4 are jointed at the overlapping longitudinal sides to constitute a unit length box 2. Then, the receiving channels 4, 4 and covering channels 3, 3 of the unit length boxes 2, 2 to be constituted along the extended direction of the supplementary pipes are linked at the overlapping sides of the each end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary tube group in which telephone lines, power cables, and the like (hereinafter, collectively referred to as cables) are inserted in a predetermined arrangement, and the auxiliary tube group is arranged on the auxiliary tube group. The present invention relates to a cable box and a method of laying the cable box.

[0002]

2. Description of the Related Art Auxiliary tubes arranged along a bridge or the like have a function of bundling a plurality of cables to be extended and physically protecting these cables. Since this auxiliary tube is usually made of polyvinyl chloride, it has poor long-term weather resistance, and if it is exposed to fire, not only the auxiliary tube but also the internal cable may be damaged. For this reason, a tube or structure called a cable box is covered on the auxiliary tube.

[0003] When a new extension pipe is to be extended, a cable box is naturally also newly established. In this case, the structure of the cable box can be freely determined to some extent in consideration of necessary structural strength and durability while taking into account the balance with the auxiliary tube group. However, the structure and specifications of the existing cable box for the auxiliary pipe group are likely to be limited due to the positional relationship between the bridge and other structures and the auxiliary pipe group. For this reason,
Conventional general cable boxes have a structure in which a roll-shaped heat insulating material is wound from one end integrally with an auxiliary tube group, and a thin steel plate having a unit length is sequentially covered thereon.

[0004]

Many of the existing auxiliary pipe groups are arranged along the bridge, and it is necessary to secure a scaffold for covering the cable box with respect to this auxiliary pipe group. However, there are many points that require caution when starting work, such as ensuring the safety of workers. In addition, after actually starting the work, when coating the thin steel sheet with the heat insulating material wound around the auxiliary pipe group, the screws connecting the thin steel sheets are excessively tightened, and the heat insulating material is penetrated, and the auxiliary pipe is inserted. In some cases, there has been a problem that the cable inserted into the auxiliary tube may be damaged. Damaged cables result in extensive telephone interruptions and power outages, and often involve more than mere operational mistakes.

[0005] The heat insulating material is made of artificial mineral fibers such as glass wool, rock wool and other ceramic fibers, and when wound around the auxiliary tube group, it may give a small cut to the operator, which is a factor that deteriorates the working environment. It has become. In addition, since the thin steel sheet is intimately covered with the heat insulating material wound around the auxiliary tube group, it is extremely thin in comparison with the size so that it is easy to bend, which makes it difficult to handle in a workplace with a poor scaffold. There was a problem. Therefore, as a cable box to cover the existing auxiliary pipe group,
In addition to examining a structure suitable for improving workability and work environment, it was decided to study a work procedure in an actual laying work using the cable box.

[0006]

As a result of the study, what has been developed is a structure in which additional tubes through which cables are inserted are covered by a group of additional tubes arranged in a predetermined arrangement. A receiving groove provided with a heat insulating material covering a part of the supporting tube group, and a cover groove having a substantially inverted U-shaped cross section provided with a heat insulating material covering the remaining outside of the side surface of the auxiliary tube group. Is a cable box which is connected at the overlapping longitudinal side surfaces to form a unit length box, and the receiving grooves and lid grooves of the unit length boxes sequentially formed in the extending direction of the auxiliary pipe are connected at the overlapping end side surfaces. The unit length box has a substantially U-shaped receiving groove in which heat insulating materials facing the both side surfaces and the lower surface of the auxiliary tube group are installed, and a substantially inverted U-shaped cross section in which heat insulating materials facing the upper surface of the auxiliary tube group are installed. And a lid groove.
A flexible surface material is attached to the surface of each heat insulating material facing the auxiliary tube group. The flexible surface material mentioned here is not limited to a material, but may be a non-woven fabric or a woven fabric, a thin steel plate, a metal foil such as an aluminum foil, or paper.

[0007] The cable box of the present invention only requires (1) a combination of a receiving groove in which a heat insulating material is inserted in advance and a cover groove to cover the supporting tube group integrally, and (2) screwing the receiving groove. It is only necessary for the connection between the unit and the lid groove or the connection between the unit length boxes, and there is no risk of breaking through the heat insulating material and damaging the auxiliary tube. In addition, the operator can work while holding the outer surface of each groove, reducing the chance of directly touching the heat insulating material. If a flexible surface material is placed on the surface of the heat insulating material, the splash of glass wool etc. from the heat insulating material will be more actively prevented. it can. If the heat insulating material is slightly protruded from the end face of each groove, the heat insulating materials are pressed against each other when the unit length boxes are connected, and continuity of the heat insulating material as the cable box can be secured. Note that the lid groove and the receiving groove can be divided by a free ratio and structure, as long as the lid groove and the receiving groove can be integrally covered with the auxiliary tube group. For example, the lid groove or the receiving groove may be further divided into a plurality. Basically, as described above, both the cover groove and the receiving groove have a substantially U-shaped cross section, and three surfaces of the receiving groove may be provided with a heat insulating material, and one surface of the cover groove may be provided with a heat insulating material.

[0008] The cable box of the present invention is used not only between the individual auxiliary tubes but also between the individual auxiliary tubes to cover the unit length box comprising the receiving groove and the cover groove separately manufactured for the existing auxiliary tube group. A gap occurs between the group and the heat insulating material in each groove. In this way, each auxiliary pipe is protected from the outside by three layers of (1) plate material forming each box, (2) heat insulating material, and (3) air filling the gap. As a result, (1) reflects against external force, (2) attenuates and protects each auxiliary pipe, and (1) reflects from heat such as fire, and (2) and (3) are insulated. In addition, (3) functions as a space for dissipating heat, and can protect the auxiliary tube group.

In order to connect the unit length boxes, the end faces of the receiving grooves or the lid grooves of the unit length boxes which are sequentially formed in the extending direction of the auxiliary pipe are abutted, and an adapter material is connected to the end of each box where the end faces abut. The receiving groove or the lid groove may be connected via the adapter material by screwing or riveting the end side surface of each box and the end surface of the adapter material which are addressed and overlapped over the side surfaces of the parts.
Various types of adapter materials can be considered,
An adapter material made of a thin steel plate formed in a similar cross-sectional shape to each groove can be exemplified. The adapter material may be provided with a long hole for screwing. It is preferable that the direction of the long hole is aligned with the longitudinal direction of each groove.

[0010] The adapter material facilitates the connection between the receiving grooves or the lid grooves. That is, the stress generated by the connection of the grooves is absorbed by the adapter material, and the grooves can be easily and easily connected. Considering that this adapter material is separate from each groove, it is preferable that the adapter material be composed of two or more dividable members, such as a lid adapter in the lid groove and a receiving adapter in the receiving groove. Note that the lid adapter and the receiving adapter need not be connected. To fix the adapter material to each box,
Usually, screwing is performed from the outside, but an adapter material is riveted in advance to one of the boxes to be connected, and the other end of the adapter material is screwed to the other of the boxes to connect the other end side surface. In this case, the laying work becomes easy. The long holes for screwing provided in the adapter material allow fine adjustment of the connection angle or connection position of each box with respect to the adapter material, and allow the entire cable box to be curved and the path length to be adjusted.

[0011] According to the present invention, for the existing auxiliary tube group in which the auxiliary tubes through which the cables are inserted are arranged in a predetermined arrangement, first, a heat insulating material facing both sides and the lower surface of the auxiliary tube group is installed. The auxiliary tube group is housed in the U-shaped receiving groove, and subsequently, a heat insulating material facing the upper surface of the auxiliary tube group is installed.
A cover groove having a U-shape is placed on the receiving groove, and the longitudinal sides of the receiving groove and the cover groove overlapping with each other are connected by screws to form a unit length box, and the unit length is sequentially formed in the extending direction of the auxiliary pipe. A cable box can be laid by a procedure of connecting the side surfaces of the boxes where the receiving grooves and the lid grooves overlap with each other by screws. As described above, in the cable box of the present invention, not only the heat insulating material and the steel sheet for protecting the heat insulating material can be laid together at one time, but also the grooves are manufactured on the assumption that they are connected, so that they can be easily connected at the laying site. There are advantages that can be done.

In the above laying method, when connecting the receiving grooves or the lid grooves of the unit length boxes sequentially formed in the extending direction of the auxiliary pipe, the end faces of the receiving grooves or the lid grooves are butted, and the adapter material is connected. To each other between the end side surfaces of the grooves where the end surfaces abut, and the end side surfaces of the overlapping boxes and the end surfaces of the adapter material are screwed, respectively, so that the receiving grooves or the cover grooves are interposed via the adapter material. Should be connected. Further, one end side surface of the adapter material is riveted to one end side surface of each of the corresponding grooves in advance, and the receiving grooves or the cover grooves of the unit length boxes sequentially formed in the extending direction of the auxiliary pipe. When connecting each other, the end faces of the receiving grooves or the lid grooves are abutted, and the other end side face of each overlapping groove and the other end side face of the adapter material are screwed, respectively, via the adapter material. It is preferable to connect the receiving grooves or the lid grooves with each other. The use of adapter material simplifies the connection of each groove,
Also, the adapter material which has been riveted to each groove in advance integrates the handling of the adapter material with each groove, thereby shortening the connection procedure.

When the group of auxiliary tubes is housed in the receiving groove, the gap between each auxiliary tube, the gap between each auxiliary tube and the heat insulating material of the receiving groove, and the heat insulating material of each auxiliary tube and the cover groove covering the receiving groove. It is advisable to attach an intermediary material to fill the gap between the support tube group. In order to use the gaps and the like of the respective mounting tubes as heat dissipation spaces, the intervening material does not fill the gaps but partially opens them.
By attaching the interposition material to the auxiliary tube group, the storage position of the auxiliary tube group with respect to the receiving groove can be easily specified (standardized laying work), and the best arrangement of the auxiliary tube group inside the cable box can be simplified. (Optimization of laying work).

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a laying configuration of a cable box 1 according to the present invention. FIG. FIG. 3 is a partially cutaway perspective view showing an assembling relationship between the lid groove 3 and the receiving groove 4 and the auxiliary tube group 5 of another example, and FIG. FIG. 5 is a perspective view showing a connection relationship between the unit length boxes 2. In each drawing, the addition pipe 6
The internal cable is omitted.

FIGS. 1 to 3 show a cable box 1 of this embodiment.
As shown in FIG. 5, a lid groove 3 having a substantially U-shaped cross section in which a lid adapter 7 having a similar cross section is previously fixed with a rivet 8, and a substantially U-shaped cross section in which a receiving adapter 9 having a similar cross section is previously fixed with a rivet 8.
The unit-shaped receiving groove 4 is fixed to the unit-length box 2 by screws 10 at the overlapping longitudinal side surfaces of the grooves 3, 4 to form the unit-length box 2. The cable box 1 is constructed by the connection.

FIG. 1 shows a state in which the cable box 1 of the present invention is covered by an existing auxiliary pipe group 5 arranged along the lower surface of the bridge 11. The supporting pipe group 5 is usually a bridge girder
(Not shown) mounted on a support surface 12 protruding therefrom. The unit length box 2 is held on a fixed frame 13 placed on the support surface 12 to stabilize the position after the unit is laid. Fixed frame 13 in this example
Is formed by screwing a base plate 15 into a U-shaped frame 14 to cover the unit length box 2 so that the U-shaped frame 14 does not come into contact with the lid groove 3 to damage the lid groove 3. A buffer plate 16 is interposed between 14 and the lid groove 3.

As shown in FIG. 2, the lid groove 3 is provided with a plate-like heat insulating material 18 facing the upper surface of the auxiliary tube group 5 on a steel plate 17 formed in a substantially inverted U-shaped cross section, and the receiving groove 4 is formed in a cross section. Plate-shaped heat insulating materials 20, 20, 20 facing the both side surfaces and the lower surface of the auxiliary tube group 5 are provided inside a steel plate 19 formed in a substantially U shape. Each insulation 18, 20
Flexible surface material made of non-woven fabric on the surface facing the auxiliary tube group 5
21 is attached so that glass wool or the like is not scattered from the heat insulating materials 18 and 20 and does not hurt the worker. As shown in FIG. 1 or FIG. 2, the auxiliary tube group 5 is housed in the receiving groove 4 with the upper interposition material 22, the intermediate interposition material 23, and the lower interposition material 24 attached with a gap therebetween. I do. The intervening members 22, 23, 24 are prepared according to the dimensions of the lid groove 3 and the receiving groove 4 to be used, the size of the auxiliary tube 6 to be stored, and the arrangement interval. Interposer 22, 23, 24
Although the material and the structure are free, the material and the structure are such that they do not damage the auxiliary tube 6 and the heat insulating materials 18 and 20 that come into contact. In this example,
Uses a chamfered metal plate. Submersible tube group 5 in receiving groove 4
Then, the unit is covered with the cover groove 3 and fixed by screws 10 on the side surfaces in the longitudinal direction where both cover the two to form the unit length box 2. In places where it is difficult to join the cross-sectionally approximately the cover groove 3 and the receiving groove 4 as in this example (in the case where it is difficult to screw the inner side of FIG. 2 with the screw due to the structure of the bridge), it can be seen in FIG. In this manner, the unit length box 2 may be configured by combining the similar cover grooves 3 and the receiving grooves 4 having a substantially L-shaped cross section.

A lid adapter 7 previously fixed with rivets 8 in the lid groove 3 and a receiving adapter 9 previously fixed with rivets 8 in the receiving groove 4
As shown in FIG. 4, each of the grooves 3 and 4 is provided with a long screw hole 25 extending in the longitudinal direction of each groove. Since the lid adapter 7 and the receiving adapter 9 are made of a thin steel plate, they have a certain flexibility, and when connecting each of the adapters 7 and 9 to another unit length box 2, at any position of the long hole 25 Depending on whether it is stopped, as shown in FIG. 5, the unit length boxes 2 can be connected with each other while slightly adjusting the angle and position. The adjustment of the connection angle and the connection position in each adapter is convenient when the cable box is laid along the slightly curved auxiliary tube group 5.

FIG. 6 is a perspective view showing the relationship between the heat insulating materials 18 and 20 and the auxiliary tube group 5 in the cable box after laying (the steel plates forming the cover groove and the receiving groove and each adapter are omitted), and FIG. It is sectional drawing showing the state of the cable box 1 similarly laid. The continuity of the heat insulating materials 18 and 20 between the unit length boxes to be connected can be obtained by inserting the heat insulating materials 18 and 20 so as to protrude slightly from the end face of each groove, if the unit length boxes to be joined at the time of connection are connected. The end surfaces of the heat insulating materials 18 and 20 can be secured by pressing each other. The protrusion of the heat insulating material also helps to maintain the continuity of the heat insulating material when adjusting the angle and the position between the unit length boxes in the adapter. As shown in FIG. 6, the unit-length box having been laid in this way constitutes a path enclosing the four surfaces except for the extending direction of the auxiliary tube group 5 with the heat insulating materials 18 and 20.

In this cable box 1, as shown in FIG. 7, first, the steel plates 17, 19 forming the grooves 3, 4 are reflected with respect to the external force F, and the external force F transmitted to the inside is a heat insulating material. The external force F can be cut off to each of the auxiliary tubes 6 by the 18, 18 functioning as a buffer mechanism.
(See right in FIG. 7). In addition, for heat S such as fire,
17 and 19 reflect the heat S due to the radiation, and the heat insulating materials 18 and 20 block the heat S. Further, the space 26 held inside the cable box 1 (the gap between the auxiliary tubes 6 and the insulating tubes 6 and (Gap between 18, 18) constitutes a heat-insulating layer of air, so that little heat is transmitted to each auxiliary pipe 6. Even if the heat transferred into the cable box 1 becomes excessive (for example, when a large fire occurs around the entire cable box), heat convection occurs in the space 26 held around the auxiliary pipe 6. Since it tries to release heat, the fire resistance can be greatly improved as compared with the conventional cable box.

[0021]

According to the cable box of the present invention, the workability in the laying work is improved by standardizing the work of connecting the receiving groove and the cover groove and connecting the unit length box thus formed, thereby improving the workability. Can be simplified. In addition, by providing a flexible surface material on the heat insulating material inserted in each groove, a favorable working environment in which glass wool or the like of the heat insulating material is not scattered is realized. And, above all, the cable box of the present invention has a great advantage that there is no risk of damaging the auxiliary pipe due to carelessness of the operator during the laying work. This means that even an inexperienced worker can carry out a reliable laying operation, and has an effect of enabling a quick and accurate laying of a cable box.

Further, the steel plate in each groove for protecting the auxiliary tube from external force, a heat insulating material for protecting the auxiliary tube from heat such as a fire, and a gap between the auxiliary tubes associated with the structure of the cable box, etc., make the safety safer than before. To provide a simple cable box. In addition, the cable box of the present invention has a simple configuration, as is apparent from the above description, so that the manufacturing cost can be suppressed, and since the laying operation is simple as described above, the laying cost is also high. No. Thus, the cable box according to the invention can be very cost-effective.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a laying mode of a cable box of the present invention.

FIG. 2 is a partially broken perspective view showing an assembling relationship between a lid groove and a receiving groove constituting a unit length box and an auxiliary tube group.

FIG. 3 is a partially cutaway perspective view showing an assembling relationship between a cover groove and a receiving groove of another example and an auxiliary tube group.

FIG. 4 is an enlarged perspective view of an end portion of a combined lid groove and receiving groove.

FIG. 5 is a perspective view showing a connection relationship between unit length boxes.

FIG. 6 is a perspective view showing a relationship between a heat insulating material and a group of auxiliary tubes in a cable box after installation (a steel plate forming a cover groove and a receiving groove and each adapter are omitted).

FIG. 7 is a cross-sectional view illustrating a state of the cable box after installation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable box 2 Unit length box 3 Cover groove 4 Receiving groove 5 Subsidiary tube group 6 Subsidiary tube 7 Cover adapter 8 Rivets 9 Receiving adapter 10 Screw 11 Bridge 12 Support surface 13 Fixed frame 14 U-shaped frame 15 Base plate 16 Buffer plate 17 Cover groove 18 Heat-insulating material inserted in the cover groove 19 Steel sheet forming the receiving groove 20 Heat-insulating plate-like material inserted in the receiving groove 21 Flexible surface material 22 Upper interposer 23 Intermediate interposer 24 Lower Intermediate material 25 Slot 26 Space F External force S Heat

Claims (9)

[Claims] 1. A receiving groove in which a heat insulating material is provided to cover a part of an outer side of a side of the auxiliary tube group, the auxiliary groove being a structure for covering an auxiliary tube through which cables are inserted in a predetermined arrangement. And a cover groove in which a heat insulating material is provided to cover the remaining outside of the side of the auxiliary tube group. The receiving groove and the cover groove are combined at the overlapping longitudinal side surface to form a unit length box, and the extension of the auxiliary tube A cable box in which receiving grooves and lid grooves of unit length boxes sequentially formed in the installation direction are connected at end side surfaces overlapping each other. 2. A substantially U-shaped receiving groove in which a heat insulating material facing both sides and a lower surface of the auxiliary tube group is installed, and a substantially inverted U-shaped cross section in which a heat insulating material facing the upper surface of the auxiliary tube group is installed. The cable box according to claim 1, comprising a lid groove. 3. The cable box according to claim 1, wherein a flexible surface material is attached to a surface of each heat insulating material facing the auxiliary tube group. 4. An end face of each of the receiving grooves or lid grooves of the unit length box sequentially formed in the extending direction of the auxiliary pipe,
The adapter material is addressed across the end side surfaces of the grooves where the end surfaces meet, and the end surfaces of the overlapping grooves and the end surfaces of the adapter material are screwed or riveted, respectively, to receive the adapter material through the adapter material. The cable box according to claim 1, wherein the grooves or the lid grooves are connected to each other. 5. The cable box according to claim 4, wherein the adapter material is provided with a long hole for screwing. 6. A sub-tube having a substantially U-shaped cross section in which heat insulating materials facing both side surfaces and a lower surface of the sub-tube group are first installed in a pre-installed sub-tube group in which a plurality of sub-tubes through which cables are inserted are arranged in a predetermined arrangement. The auxiliary groove group is housed in the receiving groove, and then a cover groove having a substantially inverted U-shaped cross section, in which a heat insulating material facing the upper surface of the auxiliary tube group is provided, is placed over the receiving groove, and the receiving groove overlaps the lid groove. A unit length box is formed by joining the side surfaces in the longitudinal direction by screwing, and the end side surfaces of the receiving grooves and the lid grooves of the unit length boxes sequentially formed in the extending direction of the auxiliary pipe are connected by screwing. How to lay cable boxes. 7. When connecting the receiving grooves or the lid grooves of the unit length box sequentially formed in the extending direction of the auxiliary pipe, the end faces of the receiving grooves or the lid grooves are butted, and the adapter material is connected to the end surface. The receiving groove or the cover groove is connected to the end side surface of each overlapping groove by screwing the end side surface of each overlapping groove and the end side surface of the adapter material through the adapter material. A method for laying a cable box according to claim 6. 8. An end face of one end of the adapter material is riveted in advance to a side face of one end of each of the corresponding grooves, and receiving grooves of unit length boxes sequentially formed in the extending direction of the auxiliary pipe or When connecting the lid grooves, the end faces of the receiving grooves or the lid grooves are butted, and the other end side surface of each of the overlapping grooves and the other end side surface of the adapter material are screwed, respectively, so that the adapter material is formed. 8. The method of laying a cable box according to claim 7, wherein the receiving grooves or the lid grooves are connected to each other via a cable. 9. A housing for accommodating an auxiliary tube group in the receiving groove, a gap between the auxiliary tubes, a gap between each of the auxiliary tubes and a heat insulating material of the receiving groove, and a heat insulating material for each of the auxiliary tubes and a cover groove covering the receiving groove. 7. The method for laying a cable box according to claim 6, wherein an interposition material for filling the gap between the cable box and the support tube group is attached to the auxiliary tube group.