JP5547130B2 - Tunnel cable support - Google Patents

Description

   The present invention relates to a tunnel cable support suitable for use in laying various types of cables such as power cables and communication cables (hereinafter simply referred to as cables) in a tunnel.

  In laying various cables in the tunnel, for example, as seen in Patent Document 1, a metal support fitting that is attached to the side wall in the tunnel in a vertically attached state at intervals, and the like. Generally used is a cable support for a tunnel constituted by a plurality of trays (seats) that are attached to the front surface of each support bracket in a multistage manner.

  However, as seen in the above-mentioned Patent Document 1, when the cable is laid in a state where it is simply placed on the arcuate portion (concave portion) of the tray body, strong wind pressure, vibration, etc. when passing through the train Since there is a risk that the cable may come off from the tray body and hang down, conventionally, as shown in, for example, Patent Documents 2 and 3 or the attached FIG. 4, the cable placed in the tray is easy. In order to prevent it from coming off, or as shown in Patent Document 4, a band for preventing the cable from dropping is attached to the tray, and further, in the attached FIGS. 5 (A) and 5 (B) As shown, the cable K placed on the tray 60 is tied with a string or a wire W to prevent the dropout.

  Thus, (Conventional Example 1) shown in FIG. 4 explains the configuration described in the above-mentioned Patent Document 2, and in the figure, TN is indicated generally on the wall surface code 20 of the tunnel. The support bracket is provided with fixing ears 21 and 22 provided with insertion holes 21A and 21A for attaching to the anchor bolts 40 and 40 at both upper and lower ends.

  As shown in the figure, the support metal 20 is provided with slits 20V along the center line, and a plurality of trays 50X are attached to the slits 20V in a multistage manner. Each tray body 50X is composed of a fixed member 50 and a movable member 51 that are connected so as to be relatively slidable via bolts 52. These members 50, 51 are provided with a cable K installed therein. The opposing curved surface portions 50R and 51R are provided so that they can be held in a tightened state. Further, a locking portion 50 ′ that can be locked to the back surface side of the support metal fitting 20 by being inserted into the slit 20 </ b> V and rotating the tray 50 </ b> X by 90 ° is provided on the back surface of the fixing member 50. Yes.

  Further, in FIG. 4, the above-described bolt 52 is inserted through the movable member 51 and its guide cylinder 54, and the screw portion at the tip is screwed into a nut 53S provided on the fixed member 50 via a return spring 52S. The locking force of the fixed member 50 and the movable member 51 with respect to the cable K is adjusted freely depending on how the bolts 52 are tightened to prevent the cable K from falling off.

  5A and 5B in which (Conventional Example 2) is shown, reference numeral 60 denotes a tray body, 61 denotes a base portion thereof, and 62 denotes a string or wire W insertion portion provided on the tray body 60. CK is a string attached to the peripheral surface of the cable K or a cover attached to the wire W, WX is a binding part of the string or the wire W, and the cable K placed (laid) in the tray body 60 is As shown in the figure, it is structured such that it is bound in the tray body 60 by a string or wire W.

Japanese Utility Model Publication No. 59-107530 JP 2004-140985 A JP 2004-140984 A Japanese Utility Model Publication No. 45-9739

  However, when the cable support described in Patent Document 2 is described in accordance with the description of (Conventional Example 1) of FIG. 4 attached thereto, the tray body 50X that supports the cable K is fixed to the fixed member 50 and the movable member 51. The two members 50 and 51 are divided and formed, and the distance between the curved surface portions 50R and 51R of both the members 50 and 51 is adjusted by screwing the bolts 12 to relatively slide them. Since it has a mechanism for holding K, there is a problem that the configuration is complicated and the manufacturing price is high, and the holding work of the cable K is complicated.

  Further, the cable support device described in Patent Document 3 is also configured to adjust the tightening degree of the cable C by the elastic plate as the tray 6 by the screwing condition of the male screw 6 with respect to the female screw 5 as described in the publication. Therefore, the structure of each tray 4 attached to the support metal 1 in multiple stages is complicated, and the manufacturing cost of the cable support becomes high, resulting in a problem that the construction price increases.

  Furthermore, the cable support device described in Patent Document 4 is engaged with the flanges 10 and 10 formed by cutting up the flanges 12 and 12 provided at both ends of the band 11 on both sides of the recess of the support fitting 8. By doing so, the cable a placed in the recess 6 of the metal fitting 8 is gripped and fixed, so that the tightening force with respect to the cable a cannot be adjusted, and therefore the thickness (diameter) of the cable a is different. In addition, there is a problem that sufficient binding force (adhesion force) cannot be exhibited, and the cable support described in FIG. 5 (conventional example 2) has a string or wire W stretched over the years. There is a problem that the binding is loosened and the support in the tunnel is hindered, and further, the binding part WX is firmly twisted and cannot be easily removed or replaced. .

  Therefore, the technical problem of the present invention is to provide a cable support for tunnels that is devised so that various cables can be laid in the tunnel quickly and reliably by a relatively simple operation. .

(1) In order to solve the above technical problem, a tunnel cable support according to claim 1 of the present invention is provided with fixing protrusions to be attached to anchor bolts at both upper and lower ends, and the whole Constructed by a metal support bracket that has a vertically long rectangular shape and slits on the center line of the front surface, and a plurality of trays for supporting cables that are mounted in multiple stages in the slit of the support bracket A cable support for a tunnel,
In the state where the curved surface portion is sandwiched between the respective receiving bodies, each of which has a substantially semicircular arc-shaped curved surface portion for holding the cable from below, the curved surface portion is held in the curved surface portion. Two left and right locking heads that allow the both ends of the resin band spanned on the upper side surface of the cable to be inserted respectively are engaged inside the left and right locking heads, each provided Rutotomoni the lock pawl to maintain the resin bands in a state of clamping the cable,
The receiving body having the curved surface portion recessed is provided with head portions on both the left and right sides of the curved surface portion, and the left and right rocking heads are respectively fitted and fixed inside the head portions. In addition, the outer walls of these left and right head portions are characterized in that an insertion port and a lead-out port for allowing both end sides of the resin band to be inserted into the locking head are formed as openings .

(2) Moreover, the tunnel cable support according to claim 2 of the present invention is prepared in advance with a plurality of types of trays having different sizes of the curved surface portion according to the diameter of the cable to be supported. It is characterized by.
It is characterized by being.

( 3 ) Further, in the tunnel cable support according to claim 3 of the present invention, the left and right locking heads each have lock claws bent and formed in a substantially L shape therein, and each lock The claw is characterized in that the blade edge is provided in a state in which the blade edge is directed in the direction of the drawer port of each head portion and in a state of elastic contact with the surface of the inserted resin band.

( 4 ) Further, the tunnel cable support according to claim 4 of the present invention is characterized in that the entire tray body is integrally formed using a flame-retardant synthetic resin material.

According to the tunnel cable support according to claim 1 described in (1) above, a large number of cable supports are attached to the tunnel wall surface using anchor bolts at intervals, and each of these cable supports is attached to the cable support. during the curved part of the mounting the pan body, seen write fitted the various cables from above, then, if the holding tightening resin handle, can be easily laid various cables on the wall of the tunnel.

In addition, according to the tunnel cable support according to claim 1 described in the above (1), the cable held by the curved surface portion of each tray body is a resin band having a function of preventing loosening by the locking head. Because of the tightening action of the cable, it is securely fixed to each tray body, i.e., the cable support side, so there is no fear that the cable will fall off the tray body due to wind pressure or vibration when passing through a vehicle such as a train. It is possible to keep the operation safe and to maintain the support state for many years.

Further, according to the tunnel cable support according to claim 2 described in the above (2), there are various types of cables laid in the tunnel, such as for signals and for lighting, depending on the application. Although the cable diameters are also different, some differences in the cable diameters can be adequately accommodated by adjusting the tightening degree of the resin band. On the other hand, if the difference in cable diameter is large, or if the cable diameter is extremely thin, by selecting and using a saucer body that has a curved surface portion that matches the cable diameter, Supporting action corresponding to cables of various diameters can be exhibited.

Further, according to the tunnel cable support according to claims 2 and 4 described in the above ( 2 ) and ( 4 ), the saucer body and the locking head are made separately, and the saucer body is made of, for example, flame retardant nylon. Because it can be integrally molded using such flame-retardant synthetic resin materials, the production cost can be reduced by mass production, and the left and right locking heads can be produced separately, and then incorporated into the left and right head parts of the tray body, respectively. By adopting the production method, it is possible to improve productivity.

Furthermore, according to the means according to claim 3 mentioned above 3, the locking pawl of the locking head mounted on the head portion of the left and right of the pan body, through the resin band (insertion) is to allow, this When pulled in the pull-back direction, the edge of the lock claw bites into the surface of the resin band and locks.

  Accordingly, it is very difficult to operate the resin band once tightened and held in the curved surface portion of the receiving plate body in the direction of loosening it. Therefore, unless it is cut with a cutting tool or the like, the resin band is moved to the receiving plate body. You will not be able to release your hug.

As described above, according to the cable support for a tunnel according to the present invention, the metal support fitting attached to the inner wall surface of the tunnel is hung on the curved surface portion of each tray body that is mounted in a multistage manner. Each cable held is held in its holding state by tightening the resin band, and the holding state can be reliably maintained by the locking claw of the locking head, and the overall configuration is relatively simple. In addition, combined with the fact that it can be manufactured at low cost and that the holding state of various cables by the resin band can be maintained over a long period of time by locking the lock claw, various types such as railways and roads. It is suitable for use as a cable for laying cables in a tunnel for transportation.

(A) is the side view which showed the Example of the cable support tool for tunnels which concerns on this invention, (B) is the front view, (C) (a) and (b) are the locking heads used by this invention It is the side view and top view which showed the Example. The Example of the metal support metal fitting used by this invention is shown, (A) is a partially broken plan view, (B) is a partially broken side view, (C) is a bottom view. It is the side view explaining the state which is supporting the cable laid in a tunnel using the cable support tool for tunnels which concerns on this invention. It is a partial cross section side view explaining the composition of conventional example 1. (A) is the side view explaining the structure of the prior art example 2, (B) is the top view.

  In the following, the embodiment of the above-described tunnel cable support according to the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 10 generally indicates a tray body constituting the present invention. In this case, for example, the tray body 10 integrally formed using a flame-retardant synthetic resin material such as flame-retardant nylon is a substantially semicircular arc-shaped curved surface portion that receives and holds the cable K to be laid from below. 11 is constituted by a support arm 10T with a concave contact 11 and a base 12 integrally formed at the root end of the support arm 10T. The tray body 10 has a diameter type (large or small) of the cable K to be supported. ), A plurality of types having different diameters of the curved surface portion 11 are prepared in advance.

  However, as shown in FIG. 1A, the tray body 10 used in the present invention includes not only a cable K having a constant diameter but also a cable KS having a different diameter indicated by a dotted line, depending on the tightening condition of a resin band described later. Since it can be held, it is possible to adapt to the size of the cable diameter within a certain range.

  Further, in the figure, reference numerals 13 and 14 denote head portions provided on the left and right upper end portions of the support arm 10T with the curved surface portion 11 interposed therebetween. The locking heads 15 and 17 are fitted and fixed from the front side of the side surface of the support arm 10T, respectively.

  Next, reference numeral 30 denotes a resin band that clamps and holds the cable K or KS in the curved surface portion 11 of the tray body 10, for example, a relatively hard flame-retardant synthetic resin material (for example, flame-retardant nylon). It is comprised using. In addition, although this resin band 30 is used, for example, while cutting a long one to a required length, it may be possible to use one cut in advance to the same length. It is optional.

  The left and right head portions 13 and 14 are formed with inlets 13A and 14A and outlets 13B and 14B for inserting and inserting the root end side 30B and the tip end portion 30A of the resin band 30, respectively. Further, the left and right rocking heads 15 and 17 are formed with insertion paths H and H for the resin band 30. Further, the one inlet 13A, the insertion passage H, and the outlet 13B, and the other inlet 14A, the insertion passage H, and the outlet 14B are provided so as to be located on the same line obliquely upward. The resin band 30 can be smoothly inserted between the root end side 30B and the tip end side 30A.

  More specifically, the left and right locking heads 15 and 17 are obliquely upward in the respective head portions 13 and 14 toward the upper tangential direction of the cable K held by each of the heads 13 and 14 as shown in FIG. It is configured to be able to effectively insert and tighten the root end portion 30B and the tip end portion 30A of the resin band 30 spanned over the upper peripheral surface of the cable K.

  In addition, inside the locking heads 15 and 17, the whole is formed in a substantially L shape as shown in the figure, and the insertion passages H, The left and right lock claws 16 and 18 configured to come into contact with the inner side surface and the outer side surface of the resin band 30 inserted into H are the attachments shown in FIGS. It is attached in a state where it is supported by the stands 16T and 18T. In FIG. 1A, 12T is a holding portion provided on the base portion 12 for fixing the locking head 15, and this holding portion 12T also constitutes a part of the head portion 13. Yes.

  Accordingly, the locking claws 16 and 18 of the locking heads 15 and 17 are respectively formed when the root end portion 30B and the distal end portion 30A of the resin band 30 are inserted in the direction of the outlets 13B and 14B of the locking heads 15 and 17, respectively. That is, at the time of tightening operation, the cutting edge is not locked to the surfaces on both end portions 30B, 30A side, and the insertion is free, but the entrances 13A of the locking heads 15, 17 with respect to the end portions 30B, 30A, When a force for pulling back in the direction of 14A is applied, the cutting edge bites into the surface of the resin band 30 to lock the pull back of the resin band 30.

  From the above, as shown in FIG. 1 (A), the state in which the cable K is placed on the curved surface portion 11 of the tray body 10, or the root end portion 30B side of the resin band 30 before placing, The cable K that is held in the curved surface portion 11 of the dish body 10 after receiving the resin band 30 from the inlet 13A of one head portion 13 through the insertion passage H of the one locking head 15 and withdrawing from the outlet 13B. Next, the distal end portion 30A side of the resin band 30 is drawn from the inlet 14A of the other head portion 14 through the insertion passage H of the other locking head 17 and drawn out from the outlet 14B. If this is pulled in the longitudinal direction indicated by the arrow, first, the cutting edge of the locking claw 15 of one locking head 15 bites into and locks the surface of the resin band 30 on the root end portion 30B side. If released, a pulling force acts on the resin band 30, and the cutting edge of the lock claw 18 of the other locking head 17 bites into and locks the surface of the resin band 30 on the tip 30 </ b> A side. The cable K can be firmly held in the curved surface portion 11 of the tray 10 by the resin band 30 with the lock 30B locked in this manner.

  In addition, when pulling the resin band 30 in the direction of the arrow, an operator may pull the tip 30A side of the resin band 30 by hand, or may be pulled using a dedicated tool. When the cable K once held in the tray 10 by the resin band 30 is removed, if the resin band 30 is cut with a cutting tool or the like, the cable K is removed and the cut resin bands from the locking heads 15 and 17 are removed. 30 can be easily removed.

  FIG. 2 shows the structure of a metal support 20 constituting the tunnel cable support according to the present invention. FIG. 2 (A) is a partially omitted front view, and FIG. Side views and (C) are bottom views, and the support brackets generally indicated by reference numeral 20 in these drawings are respectively attached to the anchor bolts 40 and 40 (see FIG. 3) at both upper and lower ends. The L-shaped fixing protrusions 21 and 22 are formed into a vertically long rectangular shape in which the protrusions 21 and 22 are in contact with each other, and a slit 20H is formed in a large opening on the center line of the front surface. .

  Further, in FIG. 2, 20A and 20A are left and right guide plates constituting both sides of the slit 20H, 20N is an upper end opening of the slit 20H, 23 is a stopper closing the lower end opening of the slit 20H, and 21A and 22A are described above. The mounting holes for the anchor bolts 40, 40 provided in the upper and lower fixing projections 21, 22, wherein the upper mounting hole 21A is formed horizontally and the lower mounting hole 22A is formed vertically, The mounting angle to the tunnel inner wall surface TN by the anchor bolts 40, 40 and the vertical position are adjustable.

  A number of metal support brackets 20 configured as described above are fixed to the inner wall surface TN of the tunnel using anchor bolts 40 and 40 at predetermined intervals in the lateral direction of the tunnel, and then each support is supported. If the base portion 12 of each of the trays 10 described above is dropped into the hollow support bracket 20 from the upper end opening 20N of the bracket 20, a plurality of trays 10 as shown in FIG. Can be attached to the inner wall surface TN of the tunnel with the support arms 10T projecting from the slits 20H in the direction of the tunnel.

  FIG. 3 shows a state in which the third tray body 10 is dropped from above. Therefore, a total of four tray bodies 10 can be dropped into the support bracket 20 of the size shown in the figure. However, this is an example of implementation, and it goes without saying that by changing the length of the support bracket 20, the number of trays 10 dropped, that is, the number of cables K supported can be adjusted.

  2 and 3, reference numeral 23 'denotes a stopper insertion hole provided in a lower portion of the upper end opening 20N of the support bracket 20. In the illustrated embodiment, a total of 4 After the base tray body 10 is dropped into the support bracket 20, a rod-like stopper (not shown) is inserted into the insertion hole 23 ′ and locked to lock out the tray body 10 from the support bracket 20 ( It is possible to prevent omission.

  In general, the fitting of the cable K to the curved surface portion 11 of the tray body 10 and the tightening operation by the resin band 30 are performed after the tray body 10 is attached to the support metal fitting 20, respectively. May be attached to a predetermined place of the cable K first, and then each of the trays 10... May be fitted and attached to each support fitting 20 attached to the inner wall surface TN of the tunnel. The selection is arbitrary.

  In the above description of the embodiment, it is described that the present invention is used for cable laying of a railway tunnel. However, this is an example of the embodiment, and the present invention is a tunnel dedicated to automobiles or a tunnel dedicated to humans. It is also suitable for use in laying cables for various tunnels.

K cable 10 saucer body 11 curved surface portion 12 base portion 13, 14 head portion
13A, 14A insertion slot
13B, 14B Drawer port 15, 17 Locking head 16, 18 Lock claw 20 Support bracket 20H Slit
21 and 22 Fixing protrusion 23 Stopper 30 Resin band 40 Anchor bolt TN Tunnel inner wall surface

Claims (4)

A metal support fitting provided with fixing protrusions to be attached to the anchor bolts at both upper and lower ends, a vertically long rectangular shape as a whole, and a slit provided on the center line of the front surface, and the support fitting A cable support for a tunnel constituted by a plurality of trays for supporting a cable that are mounted in a multistage manner in the slit of
In the state where the curved surface portion is sandwiched between the respective receiving bodies, each of which has a substantially semicircular arc-shaped curved surface portion for holding the cable from below, the curved surface portion is held in the curved surface portion. The left and right locking heads are provided so that both ends of the resin band that spans the upper side surface of the cable can be inserted, and the inside of these left and right locking heads is engaged with the inserted resin band, Rutotomoni resin band provided a locking pawl which kept tightened the cable,
The receiving body having the curved surface portion recessed is provided with head portions on both the left and right sides of the curved surface portion, and the left and right rocking heads are respectively fitted and fixed inside the head portions. In addition, the outer wall of these left and right head portions is provided with an insertion port and a lead-out port through which both end sides of the resin band are inserted into the locking head, respectively. Support tool.   2. The tunnel cable support according to claim 1, wherein a plurality of types of trays having different sizes of the curved surface portion are prepared in advance according to the diameter of the cable to be supported. Each of the left and right locking heads has lock claws bent and formed in a substantially L shape inside, and each lock claw has its cutting edge facing the direction of the outlet of each head portion. The tunnel cable support according to claim 1 , wherein the tunnel cable support is provided in a state of being elastically contacted with a surface of the inserted resin band. The tunnel cable support according to claim 1 or 2 , wherein the entire tray is integrally formed using a flame-retardant synthetic resin material.