JP3483813B2 - Piping device and piping method for cable protection tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping device used when a cable protection pipe for protecting a power cable or the like is installed in a tunnel, and a piping construction method using the device.

[0002]

2. Description of the Related Art When connecting a protection tube unit in which a plurality of cable protection tubes are bundled in sequence and pushing it into a tunnel for piping, the tunnel has a relatively large diameter and a guide rail is installed on the bottom surface of the tunnel. When it is possible, the protection tube unit is mounted on the trolley and the trolley can be pushed into the tunnel along the guide rail, so that no particular problem occurs.

However, in a small-diameter tunnel, there is a case where the working space for installing the guide rail cannot be sufficiently secured. In such a case, in the conventional case, the installation of the guide rail was omitted, the protection tube unit was mounted on the trolley with casters, and it was sent while being sequentially connected from the vertical shaft on the departure side into the tunnel,
A piping method was used in which the wire connected to the leading carriage was wound up by a winch installed in the shaft on the arrival side and drawn into the tunnel.

[0004]

A large number of carts with casters are used in a number corresponding to the number of protective tube units. If the trucks are simply pulled into the tunnel without applying any load, the trucks will be drawn straight to the bottom of the tunnel by gravity even if there is no guide rail.

However, when the trolleys and the protection tube units are mounted on the trolleys and successively drawn while connecting the trolleys and the protection tube units, if a bend occurs in the traveling direction of the trolleys,
Twist occurs at the connecting portion of the protection tube unit mounted on the dolly. Once the twist is generated due to the large frictional force of the connecting portion, it is difficult to return to the original state. Therefore, the truck is also displaced to the twisted position along the inner peripheral surface of the tunnel and cannot return to the original state. The above-mentioned twist gradually increases as the pull-in distance increases, and the leading carriage reaching the shaft on the arrival side may come out, for example, along the ceiling surface of the tunnel.

Therefore, it is an object of the present invention to provide a piping device which does not cause the above twist and a piping method using the device.

[0007]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION, piping apparatus according to the present invention, a draft rails that will be laid on tunnel bottom, equipped with a cable protection tube on the guide rail In the piping device for the cable protection pipe, which is composed of a moving carriage, and which connects the cable protection pipe on the preceding carriage and the cable protection pipe on the succeeding carriage on the guide rail in order, The rails are configured by detachably connecting individual rails of a required length in the length direction, and casters grounding to the bottom surface of the tunnel are attached to the individual rails with an elastic body interposed therebetween. A grounding part with a required clearance is provided on the individual rail between the bottom surface inside the tunnel, and the elastic body is compressed more than the clearance between the grounding parts by the load of the truck and the cable protection tube mounted on the bogie. As than it is adopted a configuration in which the.

According to the above construction, the guide rail is installed by simply pushing the individual rail in the tunnel, and there is no need to perform the work of installing the guide rail inside the tunnel.
Further, when the truck equipped with the cable protection tube gets on the individual rail, the elastic body is compressed by the load. As a result, the ground contact portion of the individual rail comes into contact with the inner surface of the tunnel, so that movement of the individual rail and the carriage on the individual rail in the circumferential direction is prevented. Therefore, it is possible to form the pipe without twisting without performing the work of previously installing the guide rail on the bottom surface in the tunnel.

It is possible to adopt a structure in which the individual rail is composed of two parallel rail members and a connecting member between the rail members, and the grounding portions are provided on the lower sides of both ends of the connecting member. . According to this structure, since the contact with the inner surface of the tunnel occurs at two positions in the circumferential direction, the action of preventing the movement occurs even when the twist in any direction in the circumferential direction.

Further, it is possible to adopt a construction in which the above-mentioned bogie is provided with a mounting portion of a connecting bar for connecting other bogies before and after the bogie. According to this configuration, the carriages can be connected by the connecting bar, so that the distance between the carriages is stable.

Incidentally, it is possible to adopt a construction in which the above-mentioned trolley is provided with the above-mentioned cable protection tube tightening device.

The invention of a piping method that solves the above problems is
The number of individual rails formed by attached the casters rolling tunnel bottom interposed an elastic body constitutes a guide rail connected after prior sequentially press proceeds up from the starting side shafts of the tunnel, on the guide rail with mounting the moving cable protection tube on a carriage which, by connecting these cable protection tube to the prior cable protection tube on the dolly of repeated operation to push the trailing bogie, carriage and which riding on said guide rail The elastic body is compressed by the load of the cable protection tube mounted on the, and a part of the individual rail is grounded to the inner bottom surface of the tunnel by the compression.

According to the above-mentioned construction method, it is possible to perform the piping without twisting without the work of previously installing the guide rail on the inner bottom surface of the tunnel.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2, the piping device 1 of the embodiment has a guide rail 3 arranged on the inner bottom surface of the tunnel 2, a plurality of carriages 4 moving on the guide rail 3, and a connection for connecting the carriages 4. The protection tube unit 1 includes a bar 5 and a tightening device 6 provided on each carriage 4, and a cable protection tube 7 is assembled on each carriage 4 in several stages and several rows.
0 is configured and tightened by the tightening device 6.

The guide rail 3 is composed of a combination of a large number of individual rails 8 which are detachably connected in the length direction. As shown in FIG. 5, each individual rail 8 is composed of two parallel rail members 9, 9 and two front end connecting members 11 and rear end connecting members 11 'connecting the front and rear ends thereof. Each rail member 9 is formed of an angle member, and square notches 12 are provided at lower edges of both front and rear ends thereof. Each of the connecting members 11 and 11 'is also formed of an angle member, and the connecting members 11 and 11' are fitted into the notches 12 of the rail members 9 on both sides and integrated by welding. A front end slanted edge 13 is formed on the upper surface of the front end of each rail member 9, and a rear end slanted edge 1 is formed on the lower surface of the rear end at the same angle.
3'is formed.

At both ends of each of the connecting members 11 and 11 ', lower corners are cut off as shown in FIG. 4 (a) to form grounding portions 14 and 14, respectively. In addition, the front connecting plate 15 is provided on the lower surface of the central portion of each connecting member 11, 11 '.
And the rear connecting plate 15 'are attached to the front connecting plate 1
5, the connecting projection 16 is provided upward. Further, the rear connecting plate 15 'is provided with a connecting hole 16'.

The rail members 9 and 9 and the connecting members 1 described above.
Brackets 17 at the four inner corners 1 and 11 '
Are fixed to each bracket 17 at an angle of inclination, and casters 18 are attached to the brackets 17. As shown in FIG. 4B, a spring receiving nut 21 is screwed into a screw shaft 19 for mounting the caster 18, and an inverted chevron-shaped leaf spring 22 is inserted into the screw shaft 19. The screw shaft 19 is vertically movably inserted into the bracket 17 at right angles, and both ends of the leaf spring 22 are in contact with the lower surface of the bracket 17. A nut 23 for retaining is screwed onto the screw shaft 19 protruding from the bracket 17.

As shown in FIG. 4 (a), the left and right casters 18 are attached so that each screw shaft 19 is inclined inward in a direction orthogonal to the inner surface of the tunnel 2 and grounded on the inner surface of the tunnel 2. The individual rails 8 are supported via the leaf springs 22 of. When the individual rail 8 is unloaded, there is a constant gap a between the ground portion 14 and the inner surface of the tunnel 2 as shown in FIG. Then, the leaf spring 22 is compressed, and both ground portions 1
4, 14 are grounded to the inner surface of the tunnel 2 (see FIG. 3).

An elastic body such as rubber may be used instead of the leaf spring 22.

Next, as shown in FIG. 6, the carriage 4 has two parallel vertical bars 25, each of which is provided with its tip end fixed to the central portion of the horizontal bar 24 made of an angle member having an inverted L-shaped cross section. The receiving plate 26 is fixed to the lower surface of each vertical bar 25 while protruding rearward. The receiving plate 26 has a front end portion protruding forward from the horizontal bar 24 to form a front connecting portion 27, and an insertion hole 29 for a connecting bolt 28 (see FIG. 7) is provided. Further, the rear portion of the receiving plate 26 constitutes a rear connecting portion 31 having a U-shaped upward cross section together with the two vertical bars 25. Connecting bolts 3 are attached to each vertical bar 25 that constitutes the rear connecting portion 31.
Two insertion holes 33 are provided.

Outside each of the vertical bars 25, a pair of bearing brackets 34, 34 made of an inverted L-shaped angle member are provided, and the tip end of each bearing bracket 34 is provided with a horizontal bar 24.
It is fixed to the rear surface of. Also, each bearing bracket 34, 3
Guide wheels 35, 35 are rotatably attached between the four. The axial distance between the guide wheels 35, 35 coincides with the distance between the rail members 9, 9 of the individual rail 8 described above.

Further, the lower tightening plates 36, 36 of the tightening device 6 are provided at both ends of the horizontal bar 24 so as to rise upward. A coupling portion 37 that is bent outward is provided at the upper end of each lower tightening plate 36. In the case shown, the upper and lower two tube pillows 3
The protection tube unit 10 composed of the three-row, three-stage cable protection tube 7 is mounted via 8 (see FIG. 2), and the upper tightening plate 3 formed in a downward U-shape.
9 is covered on the protection tube unit 10, and a connecting portion 41 is provided on the lower end of the upper tightening plate 39 by being bent outward.
Is superposed on the connecting portion 37 of the lower tightening plate 36 and is fastened by the bolt 42.

The dolly 4 comprises a set of protection tube units 1
Although one is used for 0, a connecting bar 5 having a quadrangular cross section is provided between the bogies 4 in order to connect the bogies 4 to each other, and a front end portion 44 of the connecting bar 5 is connected to the rear portion of the front bogie 4. Part 31
To the front connecting portion 27 of the rear bogie 4,
It is designed to be connected by a connecting bolt 28.

The piping device 1 of the embodiment is as described above. Next, the operation and the piping method using the device will be described.

As shown in FIG. 1, a large number of individual rails 8 from the vertical shaft 46 on the starting side of the tunnel 2 are connected to the front connecting plate 1 thereof.
The connecting projection 16 of No. 5 is inserted into the connecting hole 16 'of the rear connecting plate 15' of the preceding individual rail 8 and sequentially connected and pushed. Each of the individual rails 8 has its front end slanted edge 13 and rear end slanted edge 13 'of the rail members 9, 9 butted together,
The casters 18 roll to move the inner bottom surface of the tunnel 2. As a result, the guide rail 3 is formed by connecting a large number of individual rails 8.

A wire may be connected to the leading individual rail 8 and pulled in by a winch of a shaft (not shown) on the arrival side.

After the guide rail 3 is constructed as described above, the truck 4 is placed on the preparation rail 47 provided on the bottom of the vertical shaft 46 (see FIG. 1) on the departure side, and the cable protection tube is placed on the truck 4. 7 is mounted and the tightening device 6 is tightened to form the protection tube unit 10. In this case, only the front protection tube unit 10 has two front and rear carriages 4, 4 as shown in the figure.
Are connected by a connecting bar 5 to support the front and rear ends of the protection tube unit 10.

The tip portion 44 of the next connecting bar 5 is connected to the rear connecting portion 31 of the carriage 4.

When the above protection tube unit 10 is pushed into the tunnel 2, the individual rail 8 on which the carriage 4 is mounted is pushed.
The leaf spring 22 is compressed by the load on the carriage 4,
The left and right ground portions 14, 14 ground to the inner surface of the tunnel 2. The left and right grounding portions 14, 14 oppose the force in the circumferential direction of the tunnel acting on the individual rail 8 through the carriage 4, and prevent the movement in the circumferential direction.

For the second and subsequent protection tube units 10, first, the connection plate 45 of the connection bar 5 is connected to the front connection portion 27 of the carriage 4 placed on the preparation rail 47, and then each cable protection tube is connected. Insert the insertion port 48 (see FIG. 2) on the front end side of 7 into the receiving port 49 of the preceding protective tube unit 10 already pushed into the tunnel 2 and prepare a portion near the receiving port 49 of the cable protective tube 7. The protection tube unit 10 is configured by placing the rail on the carriage 4 on the rail 47, mounting the tube pillow 38 with the tube pillow 38 interposed, and tightening with the tightening device 6.
After that, when the vehicle is pushed into the tunnel 2, the preceding truck 4 is pushed and the individual rail 8 in the tunnel 2 is transferred. In the individual rail 8 on which the carriage 4 is transferred, each grounding portion 14 is grounded to the inner peripheral surface of the tunnel 2 as described above. Due to the grounding, the individual rails 8 and the carriage 4 are also prevented from moving in the circumferential direction with respect to the second and subsequent protection tube units 10.

When the piping of the protection pipe unit 10 is completed over the entire length of the tunnel 2 by repeating the above-mentioned work, the mortar is discharged from a mortar distribution pipe (not shown) which has been piped over the entire length of the ceiling surface of the tunnel 2 in advance. , The guide rail 3, the carriage 4, and the protection tube unit 10 are all buried inside.

[0032]

As described above, according to the piping device of the present invention and the piping method using the same, it is not necessary to previously install a guide rail at the bottom of the tunnel, and an individual rail with casters that constitutes the guide rail can be provided. A guide rail is constructed simply by pushing it into the tunnel, and when each trolley has a trolley with a protection tube unit mounted on it, the ground contact part comes into contact with the inner surface of the tunnel, so twisting the protection tube unit in the circumferential direction. Is prevented from occurring. Therefore, the protection tube unit can be installed without twisting in a tunnel having a small diameter so that a working space for installing the guide rail cannot be secured.

[Brief description of drawings]

FIG. 1 is a sectional view of a tunnel portion of an embodiment.

FIG. 2 is a partially enlarged sectional view of the above.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 (a) is a sectional view taken along line IV-IV in FIG. (B) Sectional drawing of the bb line of (a) figure

FIG. 5 is a perspective view of the individual rail of the same.

FIG. 6 is an exploded perspective view of the same truck as above.

7 is a sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

1 Piping device 2 tunnel 3 guide rails 4 dolly 5 connecting bar 6 tightening device 7 Cable protection tube 8 individual rails 9 Rail members 10 Protection tube unit 11 Front end connecting member 11 'rear end connecting member 12 notch 13 Front end inclined edge 13 'rear end inclined edge 14 Ground 15 Front connecting plate 15 'rear connecting plate 16 Connecting projection 16 'connecting hole 17 bracket 18 casters 19 screw shaft 21 Spring bearing nut 22 leaf spring 23 Locking nut 24 horizontal bars 25 vertical bars 26 Support plate 27 Front connection 28 Connection bolt 29 insertion holes 31 Rear connection 32 connecting bolt 33 insertion hole 34 Bearing bracket 35 guide wheel 36 Lower tightening plate 37 Connection 38 tube pillow 39 Upper tightening plate 41 Joint 42 volt 44 Tip 45 connection plate 46 vertical shafts 47 Preparation Rail 48 outlet 49 mouth

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Yokozeki 3-22 Nakanoshima, Kita-ku, Osaka City Kansai Electric Power Co., Inc. (72) Inventor Kikuo Komasa 1-1 Kakudacho, Kita-ku, Osaka Kurihara Industry Stock company (72) Inventor Fukuya Riho 1-12-19 Kitahori, Nishi-ku, Osaka-shi Kurimoto Iron Works Co., Ltd. (72) Inventor Yuichiro Yoshida 1-12-1 Kitahori, Nishi-ku, Osaka Kurimoto Co., Ltd. Inside the ironworks (72) Koji Hanyama 1-12-19 Kitahorie, Nishi-ku, Osaka City Kurimoto Ironworks (56) References JP-A-48-86312 (JP, A) JP-A-8-275326 ( (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 1/06 F16L 1/00 F21F 13/02

Claims (5)

(57) [Claims] And 1. A draft rails that will be laid on tunnel bottom, equipped with a cable protection tube consists of a carriage that moves on the guide rail, a cable protection tube on the dolly of the preceding on the guide rail In the cable protection pipe piping device, in which the cable protection pipes on the succeeding truck are sequentially connected and connected, the guide rails described above are used as individual rails of the required length.
Is removably connected in the longitudinal direction, and casters for grounding to the bottom surface of the tunnel are attached to the individual rails with an elastic body interposed between the individual rails and the bottom surface of the tunnel. A grounding part having a gap is provided, and the elastic body is compressed by the load of the carriage and the cable protection pipe mounted thereon to be larger than the clearance of the grounding part. Plumbing equipment. 2. The individual rail is composed of two parallel rail members and a connecting member between the rail members, and the grounding portions are provided on lower sides of both ends of the connecting member. The piping device for the cable protection pipe according to claim 1. 3. The piping device for a cable protection pipe according to claim 1, wherein the trolley is provided with a mounting portion of a coupling bar for coupling another trolley in front of and behind the trolley. 4. The cable protection pipe piping device according to claim 1, wherein the truck is provided with a tightening device for the cable protection pipe. 5. Configure the number of guide rails to connect the individual rail after prior sequentially press proceeds up from the starting side shafts of the tunnel formed by attached the casters rolling tunnel bottom interposed an elastic body, with mounting the cable protection tube on a carriage that moves on the guide rails, and connecting these cable protection tube to the prior cable protection tube on the dolly of repeated operation to push the trailing bogie, on the guide rail A cable protection pipe piping method in which the elastic body is compressed by the load of the trolley on which it is mounted and the cable protection pipe mounted on it, and a part of the individual rail is grounded to the bottom surface inside the tunnel by the compression.