JP3175827B2 - Stand for cable removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand for a cable removing device used for removing cables such as communication cables and power cables which are not used at present and are laid in an underground pipeline.

[0002]

2. Description of the Related Art FIG. 7 is an explanatory view showing an outline of a cable removing operation method in a manhole using a cable removing device. Cable removing device C in manhole A
Is installed on a dedicated stand B, and is operated by an operation control panel F on the ground using an electric hydraulic pump G installed on the ground as a power source.
The cable E in the underground conduit D is pulled out and removed by repeating the operation of clamping and towing the cable E by extending and retracting a plurality of hydraulic cylinders equipped in the underground pipeline D.

FIG. 8 is a structural view of a conventional frame for a cable removing device. The platform B for the cable removing device is a movable cart B
10 and a plurality of spacers B50 having different heights, and a receiving stand B40 on which the cable removing device C is mounted and fixed. Each of them is carried into a manhole in a separated state, and assembled in the manhole. Moving cart B10, spacer B so that it can be loaded and unloaded into small manholes
50, the cradle B40 has a structure and dimensions that allow it to pass through the inside diameter φ600mm of the entrance of the small manhole.

[0004] In the manhole, first, the mobile trolley B
10 is carried in. It is moved by the moving wheel B11 to the installation position of the cable removing device C. Thereafter, spacers B50 are stacked in accordance with the height of the underground pipeline where the cable E to be removed is laid. The upper base B51 and the lower base B52 of the spacer B50 are fitted and fixed to each other with fixing bolts B53.

When the height of the spacers B50 is determined by stacking the spacers B50, the pedestal B40 is carried into the manhole, and is placed on the upper surface of the uppermost spacer B50.
Is fixed to the cradle B40. Finally, the cable removing device C is carried into the manhole and fixed to the upper surface of the receiving table B40.

FIG. 9 is a structural view of a spacer B50 for adjusting the height of a stand for a cable removing device. FIG. 9A is a top view,
FIG. 2B is a view as viewed from A in FIG. Spacer B50
Is a rectangular parallelepiped formed by welding four pipes B54 and a frame B55 for connecting them in a rectangular shape. An upper base B52 and a lower base 52 are fixed to the upper and lower ends of the pipe B54 by welding, respectively. The spacers B50 are connected by eight fixing bolts B53 by fitting upper base B51 and lower base B52 provided at four places.

[0007]

In the above-mentioned conventional frame for a cable removing device, the spacer has a rectangular parallelepiped shape.
By adopting the method of joining the squares with bolts, in the narrow manhole, when assembling and disassembling the spacer, the hand of the worker is attached to the bolt on the wall side of the manhole opposite to the worker. There was a problem in the workability of attaching and detaching bolts because they could not reach or the tool could not be inserted. In addition, the conventional spacer adopts a welded structure, and since the material is steel, the weight per spacer is heavy, and it is necessary to load and unload the spacer into and out of the manhole, and to assemble it inside the manhole. Crane had to be used.

[0008]

SUMMARY OF THE INVENTION The present invention provides a gantry for a cable removing device which improves workability in assembling the gantry in a manhole and reduces the weight. A cradle on which the device is mounted and fixed, a plurality of cylindrical supports that can be connected to the lower part of the cradle and that can be connected to each other, and the cylindrical supports that are installed on the floor surface and connected to the upper surface The present invention is a gantry for a cable removing device which has a structure capable of moving and has a moving trolley provided with a moving wheel and a supporting screw jack.

[0009]

FIG. 1 is a structural view of a concrete example of a frame for a cable removing device according to the present invention. In the drawing, B10 is a movable trolley, moving wheels B11 and B12 for moving the cable removing device C to the installation position are supporting screw jacks, and the screw jacks B12 are turned to be pressed against the floor with a disk B13 at the tip of the screw jacks. Then, the movable carriage B10 is fixed at the installation position.

A pedestal B14 is provided on the upper surface of the movable trolley B10 so as to be fitted to the flange of the cylindrical column B20. The column B20 is connected to the pedestal B14 by a fastening ring B30. A plurality of pillars B20 are stacked up to an appropriate height, and each is connected with a fastening ring B30. Cradle B
A flange-like base (not shown) that can be fitted to the column B20 is fixed to the lower surface of the column 40, and is connected to the column B20 by a fastening ring B40.

FIG. 2 is a longitudinal sectional view of a specific example of the cylindrical column in the present invention. The support B20 has a cylindrical shape, and is provided with an upper flange B21 and a lower flange B22 on the upper surface and the lower surface, respectively, and the cross-sectional shape thereof is tapered such that the outside becomes thinner. An O-ring groove is provided on the upper surface of the upper flange B21, and the O-ring B25 is mounted in the groove. A cylindrical projection B23 is provided on the upper surface of the support, and a circular hole B24 is provided on the lower surface of the support. In the present invention, the column B20 is made of an aluminum alloy for the purpose of weight reduction.

FIG. 3 is an explanatory view of a state in which the upper and lower columns are stacked. FIG. 3A shows a state in which the upper and lower columns are brought closer, and FIG. 3B shows a state in which the upper and lower columns are stacked. As shown in the drawing, a projection B23 on the upper surface of the lower support B20,
Both are overlapped so that the circular hole B24 on the lower surface of the upper support B20 fits. At this time, since the O-ring B25 exists on the joint surface between the lower flange B21 and the upper flange B22,
A gap is left as much as the pressing allowance of the O-ring B25.

FIG. 4 is an explanatory view of a specific example of the fastening ring according to the present invention. FIG. 4A is a top view showing a partial cross section, and FIG. 4B is a side view showing a partial cross section. The fastening ring B30 in the present invention has a disk shape having a tapered groove B35 on the inside, and is constituted by two half-split rings of a fastening ring B31 on the bolt B33 side and a fastening ring B32 on the female screw B36 side. ing. The two half rings B31 and B32 are unified by tightening two bolts B33. The fastening ring B30 is also made of an aluminum alloy for the purpose of weight reduction.

FIG. 5 is a sectional view of the bolt-side tightening ring B31. As shown in the drawing, the heads of the two bolts B33 face in the same direction, and the bolts B33 have a structure in which the bolts B33 can be tightened from the same direction. Further, by attaching a retaining pin B34 to the threaded portion of the bolt B33, the bolt B33 is prevented from dropping off from the bolt side fastening ring B31.

FIGS. 6A to 6C are cross-sectional views showing a procedure for connecting the columns by a fastening ring. FIG.
Fastening rings B31, B divided into two parts from the outside on the flange portions B21, B22 of the columns B20, B20 stacked as shown in FIG.
32 is attached so that the inner tapered groove B35 is fitted (FIG. 6B). In this state, there is a gap between the columns B20 and B20, which is an unstable state. Next, the two bolts B33 (see FIG. 5) of the fastening ring are evenly tightened so that
The split fastening rings B31 and B32 approach each other, and the tapered wedge effect causes the flange portions B20 and B20 of the support posts B20 and B20.
21 and B22 approach each other, compressing the O-ring B35,
The columns B20, B20 are in contact and firmly connected (FIG. 6C).

[0016]

As described above, according to the frame for a cable removing work device of the present invention, the following effects can be obtained. (1) A cylindrical support that can be connected to each other is used as a support for supporting the cable removing device, and a fastening ring that connects these supports is a two-part disk shape, and two bolts are used from the same direction. Since the fastening ring can be assembled by tightening the bolts, when assembling the cable removal device in the manhole, the worker can tighten the bolt from any direction, and the workability of assembling and disassembling the gantry in the manhole Is remarkably improved, and work efficiency can be improved.

(2) By providing a retaining pin on the bolt of the fastening ring and taking measures to prevent the bolt from falling off,
There is no risk of the bolts falling or being lost in the manhole, and workability is improved. (3) By arranging the O-ring on the fitting surface of the flange of the column, an effect of preventing the bolt of the fastening ring from loosening due to the repulsive force of the O-ring can be obtained.

(4) By manufacturing the support and the fastening ring from an aluminum alloy, the weight of the support can be reduced. Table 1 shows a comparison of the weight of the conventional spacer for the cable removing device with the support of the present invention. As shown in Table 1, the strut of the present invention was significantly lighter than the conventional spacer. As a result, since the individual columns can be manually carried into and out of the manhole and handled inside the manhole, work efficiency can be improved. The weight of the fastening ring is about 6 kg, which can also be transported manually.

[0019]

[Table 1]

[Brief description of the drawings]

FIG. 1 is a structural view of a specific example of a frame for a cable removing device according to the present invention.

FIG. 2 is a longitudinal sectional view of a specific example of a cylindrical column in the present invention.

FIG. 3 is an explanatory view of a state in which upper and lower columns are stacked, and FIG.
FIG. 3A is a state diagram in which upper and lower columns are brought close to each other, and FIG. 3B is a state diagram in which upper and lower columns are stacked.

FIG. 4 is an explanatory view of a specific example of a fastening ring according to the present invention. FIG. 4 (A) is a top view showing a partial cross section, FIG.
(B) is a side view showing a partial cross section.

FIG. 5 is a sectional view of a bolt-side fastening ring of the fastening ring.

6 (A) to 6 (C) are cross-sectional views showing a procedure of connecting the columns by a fastening ring.

FIG. 7 is an explanatory diagram showing an outline of a cable removing operation method in a manhole using a cable removing device.

FIG. 8 is a structural view of a conventional stand for a cable removing device.

9A and 9B are structural views of a spacer for adjusting the height of the cable removing device mount, wherein FIG. 9A is a top view and FIG. 9B is a view as viewed from A in FIG. 9A.

[Explanation of symbols]

A Manhole B Stand for cable removal device C
Cable removal equipment D Underground pipeline E Cable F Operation control panel
G Electric hydraulic pump H Hydraulic hose B10 Moving carriage B11 Moving wheel B12 Support screw jack B13 Disk B14 Pedestal B20 Support B21 Upper flange B22 Lower flange B23 Cylindrical projection B24
Circular hole B25 O-ring B30 Fastening ring B31 Fastening ring on bolt side B32 Fastening ring on female thread side B33 Bolt B34
Retainer pin B35 Tapered groove B36 Female thread B40 Cradle B50 Spacer B51 Above base B52 Below base B53 Fixing bolt B54 Pipe B55 Frame

Claims (5)

(57) [Claims] 1. A receiving device for mounting and fixing a cable removing device.
And a base that can be connected to the lower part of the cradle and that can be connected to each other.
A number of cylindrical supports,It is provided at both ends of this support so that the outside in the cross section is thin
Tapered flange,  A structure that can be installed on the floor surface to connect the above cylindrical column to the upper surface
With a moving wheel and a supporting screw jack.
Moving trolleyWhen, It has a tapered groove on the inside, and the
Two-part fastening that joins columns by sandwiching the edge
With ring Characterized by a cable removal device
Mount. Wherein the upper surface of the lower surface and the movable carrier of the cradle, the flange of the flange and the shape of the cylindrical post is provided, and the mobile dolly the pedestal and struts and strut, the fastening ring
Inserts each other's flanges with a fastening ring of the same shape as
2. The base for a cable removing device according to claim 1 , wherein the base is connected by a connection . 3. a possible assembly by a fastening ring two bolts of the two-division, and claim 1 volt during fastening ring segments are characterized by having a structure that does not fall off also
Is a stand for a cable removing device according to 2 . 4. The gantry for a cable removing device according to claim 1 , wherein an O-ring is provided on a fitting surface of a flange of the cylindrical column. 5. 請 characterized by using aluminum alloy material of the fastening ring of the strut and 2 division of the cylindrical
3. A stand for a cable removing device according to claim 1 or 2 .