JP2009201289A - Device and method for lifting cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method wherein other cables disturbing removal work are lifted from a removal work area in a cable pit, and are temporarily moved upward with high efficiency. <P>SOLUTION: A cable lifter 1 is a device for lifting the cables C2 laid in the cable pit P while supporting them, and includes: gate-shaped frame bodies 2 each formed by connecting the upper parts of a pair of column legs 3 through the use of a horizontal beam 4; lifting and lowering parts 5 each provided along the column leg 3, cable support bodies 6 each provided at the lifting and lowering part 5 so as be freely lifted and lowered; and rotation driving parts 8 each disposed on the upper side of the horizontal beam 4. Then, the support bodies 6 have a coupling part 16 with inner screws and a long bolt 17 to be screwed with the coupling part 16, each output shaft of the rotation driving parts 8 is coupled to the long bolt 17, and while the gate-shaped frame bodies 2 are installed astride the cable pit P, the cables C2 to be lifted on the support bodies 6 are supported. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lifting device and a lifting method for lifting up another cable that obstructs removal and lifting away from a removal work area when removing a cable laid in a cable pit.

  Various cables connected to a control panel used for electrical equipment in various plants and factories are generally laid in a cable pit. Cables that are no longer used when updating control panels, etc., must be removed from the cable pit. Normally, many cables used for various facilities are laid in the cable pit, but when removing the cables to be removed by a process such as pulling out or cutting, the cables to be removed are other cables. In the case of the lower part of the cable, a method is adopted in which, for example, the cable that should be removed is first exposed by bringing another cable that gets in the way to the side, and then the cable that is to be removed is pulled out.

  However, if there are other obstructing cables in the vicinity of the cable to be removed, it is possible to damage the cable to be removed or pulled out, so great care must be taken.

  Patent Document 1 and Patent Document 2 describe a cable removal device and a removal method. The device of Patent Document 1 is configured to clamp a cable to be removed and pull it out by hydraulic pressure. However, in order to pull out a cable using this apparatus, it is necessary to clamp the cable to be removed first. However, if the cable to be removed is buried under another cable, the clamping operation becomes difficult.

  In the removal method described in Patent Document 2, even when the cable to be removed is buried below the other cable, the damage to the other cable is reduced by using an auxiliary tool, and the cable to be removed is removed. Can be pulled out in the lateral direction. However, when the cable is pulled out from the cable pit, the cable is often required to be pulled obliquely upward, and this method limits the application target.

JP 2004-147478 A JP 2001-258115 A

  On the other hand, it is advantageous if there is a means for efficiently moving other cables temporarily from the removal work area to another place so that other cables that are in the way are not damaged during removal. However, no such efficient device or method is known. Then, this invention makes it a subject to provide the apparatus and method which lift the other cable which becomes obstructive at the time of removal work from the work area of removal, and to move to another area temporarily efficiently.

A cable lifting device of the present invention that solves the above-mentioned problem is a device that lifts upward in a state where a cable laid in a cable pit is supported, and is a gate in which upper portions of a pair of column bases are connected by a horizontal beam. A mold frame, an elevating part provided along the column base, a cable support provided in the elevating part so as to be movable up and down, and a rotation driving part arranged on the upper side of the transverse beam,
The support body has a connecting portion in which an internal thread is formed, and a long bolt that is screwed to the connecting portion, and an output shaft of the rotation driving portion is connected to the long bolt,
The cable C2 to be lifted on the support is supported in a state where the portal frame is installed so as to straddle the cable pit (Claim 1).

  In the above-described cable lifting device, one of the column bases can be slidably connected to the transverse beam in the longitudinal direction thereof (claim 2).

  In the cable lifting apparatus for slidably connecting the one column base to the horizontal beam in the longitudinal direction thereof, the lifting and lowering portions are respectively provided on the pair of column bases, and the cable supports are respectively provided on the lifting and lowering portions. A rotation drive unit can be arranged for each lifting unit, and each rotation drive unit can be slidably arranged on the upper side of the transverse beam.

  In the cable lifting device in which the lifting and lowering portions are respectively provided on the pair of column bases, the rotation driving portions can be slidably disposed on the upper side of the cross beam via a support base made of a magnet device. 4).

  In any of the above-described cable lifting apparatuses, a plurality of cable supports can be provided at predetermined intervals in the vertical direction of the elevating unit.

  Furthermore, in any of the above-described cable lifting apparatuses, the cable support can be constituted by an arm extending obliquely upward from the elevating part.

  In any one of the cable lifting apparatuses described above, the output shaft of the rotation drive unit is extended in the longitudinal direction of the cross beam, and the output shaft and a long bolt extending in the vertical direction are connected to each other by a gear mechanism for 90-degree direction conversion. (Claim 7).

  The cable lifting method of the present invention that solves the above problem is a method of lifting upward in a state in which a cable laid in a cable pit is placed. Then, using any of the cable lifting devices described above, with the frame of the lifting device installed so as to straddle the cable pit, the cable to be lifted is placed on the support, and the rotation drive unit is driven. Then, the support body of the elevating part is raised to lift the cable (Claim 8).

  The cable lifting device according to the present invention, as described in claim 1, is a cable to be lifted (a cable that hinders removal) in a state where a gate-shaped frame is installed so as to straddle the cable pit. It can be supported by a support. And when the support body in the state where the cable is supported is raised by the elevating part, the cable to be lifted is lifted above the cable pit, so that the cable to be removed laid below the cable pit is exposed. be able to. The exposed cable can be easily removed by cutting or pulling out, etc. At that time, other cables that interfere with the removal work have been moved above the cable pit and may be damaged during the removal work. There is no. In addition, after the cable to be removed is removed from the cable pit, the cable supported by the support can be easily returned to the original location by lowering the elevating part.

  In the cable lifting apparatus, as described in claim 2, one of the column bases can be slidably connected to the transverse beam in the longitudinal direction thereof. In this way, one column base is slidably connected to the horizontal beam in the longitudinal direction so that one column base slides in the longitudinal direction relative to the horizontal beam according to the width even if the width of the cable pit is different. In addition, the distance between the pair of column bases can be adapted to the width of the cable pit.

  In the lifting device of the cable for slidably connecting the one column base to the transverse beam in the longitudinal direction thereof, as described in claim 3, each of the column bases is provided with the elevating parts, and the elevating parts are provided. In addition, a cable support can be provided for each, and a rotation drive unit can be arranged for each lifting unit, and each rotation drive unit can be slidably arranged on the upper side of the cross beam. With this configuration, it is possible to support twice as many cables as in the case where the support is provided only on one of the column bases, so even when there are more obstructive cables on the cable to be removed, These cables can be lifted at once. Moreover, even if the width of the cable pit is different, it can be easily adapted to it.

  In the cable lifting device in which the lifting and lowering portions are provided on the pair of column bases, respectively, the rotation driving portions can be slidably moved through the support bases made of a magnet device. It can be arranged on the upper side. In this way, when each rotation drive unit is slidably arranged on the upper side of the cross beam via the support base, the arrangement of the rotation drive unit is changed when the distance between the pair of column bases is changed to match the width of the cable pit. The position can be easily changed accordingly, and the rotational drive unit can be arranged on the upper side of the cross beam in a stable state.

  In any one of the above-described cable lifting apparatuses, as described in claim 5, a plurality of cable supports can be connected at predetermined intervals in the vertical direction of the elevating unit. If comprised in this way, many cables can be supported and it can be lifted upwards at once.

  Furthermore, in any of the above-described cable lifting apparatuses, as described in claim 6, the cable support can be constituted by an arm extending obliquely upward from the elevating part. In this way, if the cable support is composed of an arm that extends obliquely upward from the elevating part, the cable can be easily placed and supported on the support simply by sliding the cable from the diagonally upward direction. In addition, the supported cable can be supported in a stable state even when subjected to vibrations or attacks from others in the lifting process or in the descending process after removal work.

  In any one of the cable lifting apparatuses described above, as described in claim 7, the output shaft of the rotary drive unit is extended in the longitudinal direction of the transverse beam, and the long bolt extending in the vertical direction is extended by 90 degrees in the vertical direction. The gear mechanisms for conversion can be connected to each other. In general, the rotational drive unit composed of an electric motor with a speed reduction mechanism has a longer output shaft direction than the height direction. Therefore, when configured as described above, the stability of the rotational drive unit disposed on the upper side of the cross beam is improved. . And by using the gear mechanism for 90 degree direction conversion, the output shaft of the rotational drive part arrange | positioned in the horizontal direction can be easily connected with the long volt | bolt extended to an up-down direction.

  The cable lifting method of the present invention that solves the above-described problems uses any one of the cable lifting devices described above. And in the state where the frame of the lifting device is installed so as to straddle the cable pit, the cable to be lifted is placed on the support body, the rotation drive unit is driven to raise the support unit of the lifting unit, and the cable It is characterized by lifting. According to this method, other cables that interfere with the removal work can be easily lifted and separated from the removal area. As a result, the removal work is facilitated, and there is no possibility that other obstructing cables will be damaged during the removal work.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing the overall configuration of the lifting device according to the present invention, and FIG. 2 is a plan view of FIG. The lifting device 1 includes a gate-shaped frame 2 in which upper portions of a pair of column bases 3 are connected by a cross beam 4, an elevating unit 5 provided along two column bases 3, and two elevating units 5, respectively. Two rotation driving units 8, a control unit 9, an operation unit 10 and 90 degrees disposed on the upper side of the cross beam 4 via a support base 7 including a magnet device 7a on the upper side of the plurality of support bodies 6 and the horizontal beam 4 connected to each other. A direction change gear mechanism 11 is provided.

  As shown in FIG. L is formed in a groove shape having a square cross section downward from L, and the lifting device 1 connects a pair of column bases 3 to the base surfaces F. It arrange | positions so that it may arrange | position to L and straddle the width direction. At this time, in order to stably dispose the lifting device 1 at both edges of the cable pit P, L-shaped support plates 3a are respectively fixed to the lower portions of the pair of column bases 3 so as to be orthogonal thereto.

  Both the column base 3 and the cross beam 4 constituting the portal frame 2 are made of a steel material having a U-shaped cross section. As shown in FIG. 2, the column base 3 arranged on the right side has a bolt or the like on the cross beam 4. The column base 3 arranged on the left side is connected to the cross beam 4 so as to be slidable in the axial direction. In this embodiment, the flange part of the steel material which comprises the cross beam 4, and the flange part of the steel material which comprises the column base 3 are detachably fixed using two fasteners 13 such as a giant clam vise.

  As described above, one of the column bases 3 constituting the portal frame 2 is configured to be slidably connected to the cross beam 4 in the axial direction thereof. Therefore, when the lifting device 1 is arranged at both edges of the cable pit P, the column base 3 on the right side of the frame 2 is first positioned and arranged at one edge of the cable pit P, and then the cable pit P After the left column base 3 is positioned and arranged on the opposite edge, the left column base 3 can be fixed to the cross beam 4 with a fastener 13. Thus, even if the width of the cable pit P is different, the lifting device 1 of the present invention can be easily applied to the width.

  FIG. 2 shows a state in which two lifting devices 1 are arranged at predetermined intervals in the length direction of the cable pit P. When the two lifting devices 1 are used in this way, the cable to be lifted can be supported and lifted at two places in the longitudinal direction, so that the work area of the cable to be removed can be further expanded. is there. However, in some cases, only one lifting device 1 can be arranged to perform the lifting operation of the cable.

  The elevating part 5 has a movable body 15 made of an elongated U-shaped steel material, and a fixed guide body 19 that guides the movable body 15 so as to be movable up and down. The fixed guide body 19 is fixed to the column base 3. The movable body 15 has a connecting portion 16 in which an inner screw such as a nut is formed at an upper end portion thereof, and a long bolt 17 that is screwed into the connecting portion 16. On the other hand, the rotational drive part 8 arrange | positioned above the cross beam 4 via the support stand 7 which consists of a magnet apparatus 7a is comprised with the motor etc. with a speed-reduction mechanism. The output shaft of the rotational drive unit 8 extending in the horizontal direction is connected to the gear shaft on the primary side of the gear mechanism 11 having two bevel gears or a worm and a worm gear that mesh with each other, or a worm and a worm gear. The upper end of the long bolt 17 is detachably connected to the side gear shaft.

  In order to connect the upper end portion of the long bolt 17 to the gear shaft on the secondary side of the gear mechanism 11, it is necessary to penetrate the upper portion of the long bolt 17 through the horizontal beam 4. Since the position where the right column base 3 is fixed to the horizontal beam 4 with a fixing tool 12 such as a bolt is determined, the through hole for the long bolt 17 of the elevating part 5 can be formed at a predetermined position of the horizontal beam 4. .

  However, since the left column base 3 is slidably connected to the horizontal beam 4 in the axial direction, a slit 14 extending in the axial direction is provided in the horizontal beam 4 as shown in FIG. The long bolt 17 of the elevating part 5 provided on the left column base 3 passes through the slit 14 and is connected to the gear mechanism 11.

  In the present embodiment, two rotation driving units 8 are arranged, but these rotation driving units 8 can be driven by a drive signal from a common control unit 9. The control unit 9 can be configured by a drive control device using a thyristor, for example, and performs predetermined reversible rotational drive control on the two rotational drive units 8 simultaneously or individually in response to an operation signal from the operation unit 10.

  3 is an exploded view of the elevating unit 5, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. The movable body 15 constituting the elevating part 5 is made of a U-shaped steel material as described above, and a connecting part 16 having an internal screw formed on the closed part at the upper end thereof is fixed, and the upper end of the rear surface of the movable body 15 is fixed. A roller portion 18 is projected. An elongated channel-type fixing guide body 19 is fixed to the column base 3 with a fixing tool such as a bolt.

  An upper end portion of the long bolt 17 constituting the elevating part 5 is connected to a socket 11 a constituting a part of the gear mechanism 11. Specifically, the head of the long bolt is fitted to the lower side of the socket 11a, and the shaft of the secondary gear of the gear mechanism 11 is fixed to the upper side of the socket 11a. The rotation of the rotation drive unit 8 is transmitted from the primary gear of the gear mechanism 11 to the long bolt 17 via the secondary gear and the socket 11a.

  FIG. 3 shows the details of a plurality of support members 6 connected to the elevating unit 5. Each support body 6 is connected to a movable body 15 of the elevating unit 5 in the vertical direction (longitudinal direction) in a cantilever manner at a predetermined interval, and has an elongated arm 6a having a rectangular cross section extending obliquely upward therefrom. The outer side of the arm 6a is covered with a protective tube 6b having elasticity such as a rubber material. By covering the outer side of the arm 6a with the protective tube 6b in this way, the shock applied to the cable when the cable is placed on the support 6 can be alleviated, so that it is possible to prevent damage to the cable covering and the core wire.

(Function)
Next, a method for removing the cable to be removed that is laid in the cable pit P will be described. In the example shown in FIG. 1, three cables C1 to be removed are laid on the bottom near the center of the cable pit P, and a plurality of other cables C2 that are obstructive to the removal work are laid on the upper side. Has been.

  First, a pair of lifting devices 1 are arranged so as to straddle the cable pit P. At that time, the movable body 15 is guided to the fixed guide body 19 of each column base 3. Then, the right column base 3 and the cross beam 4 are fixed, and the long bolt 17 is screwed to the connecting portion 16 of the movable body 15 and is erected on the cable pit P. Next, the left column base 3 is connected to the cross beam 4 through a giant clam vise. Next, the rotation drive unit 8 is driven by an operation command from the operation unit 10, and the elevating unit 5 is moved downward to set the support 6 to an appropriate height.

  Next, other cables C2 that are obstructive at the time of removal are sequentially placed on the support 6. At that time, since the arm 6a of the support 6 extends obliquely upward, the other cable C2 can be easily placed while sliding from the end of the arm 6a. When a predetermined number of other cables C2 are placed on the support 6 and the cable C1 to be removed is exposed when viewed from above, the placement operation of the other cables C2 on the support 6 is stopped. .

  Next, the rotary drive unit 8 is driven by the operation unit 10 to raise the elevating unit 5 and raise another cable C2 placed on the support 6 to a height that does not interfere with the removal work. Therefore, the cable C1 to be removed is subjected to processing such as drawing or cutting, and a part thereof is lifted upward from the cable pit P. Next, the rotary drive unit 8 is driven by the operation unit 10, and the elevating unit 5 is lowered to an appropriate height to return another cable C <b> 2 to a predetermined position of the cable pit P.

  Such an operation is sequentially performed many times in series along the cable pit, and the cable C1 to be removed is completely lifted over its entire length and pulled out. The reason why such an operation is sequentially performed many times is that when the cable C1 to be removed is lifted upward, the pre-lifting length of each cable is not so long. In the above-described embodiment, the head of the long bolt 17 is rotationally driven by a motor. Instead, the head of the long bolt 17 may be manually rotated by using an appropriate tool.

  The lifting device of the present invention can be used for removing a cable laid in a cable pit.

Sectional drawing which shows typically the whole structure of the lifting apparatus which concerns on this invention. The top view of FIG. The exploded view of the raising / lowering part 5. FIG. AA sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting device 2 Frame 3 Column base 3a Support plate 4 Cross beam 5 Lifting part

6 support body 6a arm 6b protective tube 7 support base 7a magnet device 8 rotation drive unit 9 control unit 10 operation unit

DESCRIPTION OF SYMBOLS 11 Gear mechanism 11a Socket 12 Fixing tool 13 Fastening tool 14 Slit 15 Movable body 16 Connection part

17 Long bolt 18 Roller part 19 Fixed guide body P Cable pit F. L Base surface C1 Cable to be removed C2 Other cable (cable to be lifted)

Claims (8)

A device that lifts upward while supporting the cable C2 laid in the cable pit P, and is a gate-shaped frame (2) in which the upper part of a pair of column bases (3) is connected by a cross beam (4) And an elevating part (5) provided along the column base (3), a cable support (6) provided movably up and down in the elevating part (5), and an upper side of the cross beam (4). A rotation drive unit (8),
The support body (6) has a connecting portion (16) in which an internal screw is formed, and a long bolt (17) screwed into the connecting portion (16), and the output of the rotary drive portion (8) The shaft is connected to the long bolt (17)
A cable configured to support the cable C2 to be lifted on the support (6) in a state where the portal frame (2) is installed so as to straddle the cable pit P. Lifting equipment.   The cable lifting device according to claim 1, wherein one of the column bases (3) is slidably connected to the transverse beam (4) in the longitudinal direction thereof.   In Claim 2, the said raising / lowering part (5) is provided in a pair of column base (3), respectively, and the support body (6) of each cable is provided in these raising / lowering part (5), and also the raising / lowering part (5) A cable lifting device, characterized in that a rotation drive unit (8) is arranged for each, and each rotation drive unit (8) is slidably arranged on the upper side of the cross beam (4).   4. The cable lifting device according to claim 3, wherein each of the rotational drive sections (8) is slidably disposed on the upper side of the cross beam (4) via a support base (7) comprising a magnet device (7a). Heavy equipment.   The cable lifting device according to any one of claims 1 to 4, wherein a plurality of cable supports (6) are provided at predetermined intervals in the vertical direction of the elevating part (5).   6. A cable lifting apparatus according to claim 1, wherein the cable support (6) comprises an arm (6a) extending obliquely upward from the elevating part (5). .   7. An output shaft according to claim 1, wherein the output shaft of the rotary drive portion (8) is extended in the longitudinal direction of the transverse beam (4), and the long bolt (17) extending vertically from the output shaft is 90 degrees. A cable lifting device, which is connected to each other by a gear mechanism (11) for direction change.   A method of lifting upward in a state in which the cable C2 laid in the cable pit P is supported, and using the lifting device (1) according to any one of claims 1 to 7, With the frame (2) of the lifting device (1) installed so as to straddle, the cable C2 to be lifted is supported by the support (6), and the rotary drive unit (8) is driven to raise and lower the unit. A cable lifting method, wherein the support (6) of (5) is lifted to lift the cable C2.

Images