JP3172291B2 - Cable drum attachment / detachment device for extension line work vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle used for a work for sending a new cable from a cable drum or winding an old cable to be removed around a cable drum in construction work for extending a cable between utility poles. The present invention relates to a cable drum attaching / detaching device for a working vehicle.

[0002]

2. Description of the Related Art In a cable extension work, an extension work vehicle having a cable drum supported on a carrier is used. For example, Japanese Utility Model Application Publication No.
What is described in 73493 gazette is known. The wire drawing work vehicle has a parallel arm provided on a loading platform so as to be able to move up and down, and a bearing portion for detachably supporting a shaft of a cable drum is provided between the parallel arms.

[0003]

In the above-mentioned conventional wire drawing work vehicle, when attaching and detaching the cable drum to and from the parallel arm, it is necessary to use a tool to tighten and loosen the screws. An object of the present invention is to provide a device that can quickly and reliably attach and detach a cable drum to and from a support device.

[0004]

According to the present invention, a fixed post 3 and a drive post 4 are provided on a carrier 1 so as to face each other on the left and right sides, and a cable drum D is provided between the fixed post 3 and the drive post 4. Is provided to a predetermined height, and a moving device for horizontally moving the fixed post 3 and the driving post 4 is provided, while a detachable through shaft 20 is provided so as to penetrate the center of the cable drum D, The through shaft 20 includes a shaft cylinder 21 and a sliding shaft 22 inserted inside the shaft cylinder slidably in the axial direction. A spline fitting portion 23 is provided at one end of the shaft cylinder 21. The moving shaft 22 is always urged by a spring 32 or the like in a direction in which the end is retracted into the shaft cylinder 21, and further, bearings 36, 3 are provided on outer periphery of both ends of the shaft cylinder 21.
7, and a positioning block 34 having a V-shaped concave portion 34 a for allowing the bearing 36 at one end side of the through shaft 20 to abut on the drive post 4 and disposing it at a predetermined shaft support position.
And a spline shaft 24 is provided by a hydraulic mechanism so that the spline shaft 24 can protrude and retract horizontally to the fixed post 3 side and can be rotated by a motor 28. When the spline shaft 24 projects, the spline shaft 24 is fitted into the spline fitting portion 23 of the barrel 21. At the same time, it is configured such that one end of the sliding shaft 22 can be pushed to project the other end from the other end of the shaft cylinder 21.
A positioning block 35 having a V-shaped recess 35a for abutting the bearing 37 at the other end of the through shaft 20 and disposing the bearing 37 at a predetermined shaft support position is provided. Sliding shaft 22 protruding from shaft cylinder 21
A bearing 31 capable of receiving the other end is provided to constitute a cable drum attaching / detaching device for a wire drawing work vehicle.

[0005]

In the cable drum attaching / detaching apparatus of the present invention, when the cable drum is mounted, first, the cable drum D is moved above the positioning block 35 by the moving device between the fixed post 3 and the driving post 4. It is raised to the height, moved horizontally just above, and then lowered onto the positioning blocks 34 and 35. Since the through shaft 20 is mounted on the cable drum D in advance, the bearings 36 and 37 at both ends of the through shaft 20 are lowered onto the positioning blocks 34 and 35. The penetrating shaft 20 is guided by the V-shaped recesses 34a and 35a, and is disposed at a position where the spline shaft 24 of the drive post 4 and the bearing 31 of the fixed post 3 are aligned with the axis. Then, the hydraulic mechanism is operated to move the spline shaft 24 from the drive post 4 to the fixed post 3.
Protrude horizontally to the side. The spline shaft 24 is
And the sliding shaft 22
Is pushed to make the other end protrude from the other end of the shaft cylinder 21 and inserted into the bearing 31 of the fixed post 3. Spline shaft 24
However, when fitting to the fitting portion 23, the bearings 36, 3
By virtue of 7, the penetrating shaft 20 rotates relatively lightly on the positioning blocks 34 and 35, and the engagement of peaks and valleys is easily performed. Thereafter, if the spline shaft 24 is rotated, the cable drum D can be rotated together with the through shaft 20. When the cable drum D is removed, when the spline shaft 24 is retracted, the engagement with the drive post 4 is released, and at the same time, the sliding shaft 22 is returned by the spring 32, and the end of the sliding shaft 22 is retracted into the shaft cylinder 21. 3 is disengaged from the bearing 31. Thereafter, the moving device is operated in reverse to remove the cable drum D.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a cable drawing work vehicle, FIG. 2 is a plan view of a cable drawing work vehicle, FIG. 3 is a front view of a cable drum supporting device, FIG. 4 is a vertical sectional front view of a drive post, and FIG. 6, FIG. 6 is a cross-sectional view of the through shaft, FIG. 7 is a perspective view of the stator, FIG. 8 is a front view of a positioning block on the drive post side, FIG. 9 is a front view of a positioning block on the fixed post side,
10 is a front view of the lift rail, FIG. 11 is a plan view of the lift rail, FIG. 12 is a side view of the lift rail, FIG. 13 is a front view of the moving saddle, and FIG. 14 is a side view of the moving saddle.

[0007] As shown in FIGS. 1 and 2,
Four cable drum supporting devices 2 for detachably supporting the cable drum D are provided at front, rear, left and right. The cable drum supporting device 2 includes a fixed post 3 and a driving post 4 which are a pair of left and right bearings.

As shown in FIGS. 2, 10 to 12,
A pair of parallel elevating rails 5 is provided between the fixed post 3 and the driving post 4 so as to extend in the front-rear direction. The elevating rail 5 is connected by connecting rods at both ends and has a rectangular frame shape. A lifting device 6 is provided on the side of the lifting rail 5 between the front and rear drive posts 4. The elevating device 6 includes a rectangular support frame 7 fixed to the side of one of the rails 5 so as to stand upright, and a guide rail for guiding the support frame 7 to move up and down between the front and rear drive posts 4. 8 and a hydraulic cylinder 9 erected between the support frame 7 and the carrier 1. Support frame 7
Is connected to the lifting rail 5 via an arm 10 at the lower end. The guide rail 8 is the front and rear drive post 4
The guide blocks 11 on both upper sides of the support frame 7 are slidably engaged with the guide rails 8.

A movable saddle 12 is provided on the lift rail 5 so as to be movable in the front-rear direction along the lift rail 5. The moving saddle 12 carries the cable drum D on the upper part and moves between the front and rear cable drum supporting devices 2.
That is, as shown in FIGS. 13 and 14, the movable saddle 12 includes a base 16 slidably engaged with the elevating rail 5,
And a saddle body 17 provided thereon. The saddle body 17 is pivotally connected to a base 16 by a pin 18 at the front. A hydraulic cylinder 19 is interposed between the saddle main body 17 and the loading platform 1, and the saddle main body 17 is capable of standing up and down due to expansion and contraction of the hydraulic cylinder 19. The longitudinal movement device 13 for moving the saddle 12 in the longitudinal direction by a predetermined distance includes a hydraulic cylinder 14 and a chain 15 (FIGS. 10 to 12). The hydraulic cylinder 14
It is fixed to an intermediate portion of the lifting rail 5 in parallel with these, and the rods 14a and 14b are alternately projected from both ends. Chain sprockets 14c and 14d are pivotally supported at the tips of the rods 14a and 14b. The chain 15 is stretched between an intermediate portion of the lifting rail 5 and both front and rear ends of the movable saddle 12.
The chain sprockets 14c and 14d mesh with each other. Therefore, the movable saddle 12 can be moved back and forth by a predetermined distance by the ingress and egress of the rods 14a and 14b. When the rod 14a or 14b is in the maximum projecting state, the cable drum D on the moving saddle 12 is arranged at a position corresponding to the front or rear cable drum supporting device 2, and in the maximum extending state of the hydraulic cylinder 9, the moving saddle is 12, the cable drum D is arranged at a position slightly higher than its shaft support height position.
As described above, the moving device for raising the cable drum D to the predetermined height position, the front-rear position, and horizontally moving the cable drum D is provided on the loading platform 1.

In order to support the cable drum D on the cable drum supporting device 2, a through shaft 20 is mounted at the center of the cable drum D. As shown in FIG.
Is composed of a shaft cylinder 21 and a sliding shaft 22 inserted inside the shaft cylinder slidably. A spline fitting portion 23 is provided at one end of the barrel 21. Sliding shaft 22
In FIG. 6, the left end can be protruded and retracted to the left, and is normally retracted by the spring 32, but is supported by the bearing 31 of the fixed post 3 in the protruding state. Bearings 36 and 37 are attached to the outer periphery of both ends of the shaft cylinder 21. A support ring 38 is provided on the outer periphery of the other end of the shaft cylinder 21.
Are screwed, and a bearing 37 is attached to the outer periphery thereof. On the end face of the support ring 38, a positioning ring 39 which comes into contact with the end face of the barrel 21 and determines its screwing position.
Is fixed. The through shaft 20 is fixed to the center hole of the cable drum D via the stator 29 and the spacer 30. By changing the fixing position of the stator 29, the present invention can be applied to cable drums D of various dimensions. That is, as shown in FIG. 7, the stator 29 is a cylindrical member having a substantially C-shaped cross section and having an axial slit 29a.
By tightening the butting edges 29b, 29b of a with the bolts 33, the through shaft 20 can be gripped and fixed at a desired position on the shaft 20.

As shown in FIGS. 4 and 5, each driving post 4
Is provided with a spline shaft 24 so as to be able to protrude and retract horizontally toward the bearing 31 of the fixed post 3 and to be rotatable. The spline shaft 24 is connected to a hydraulic cylinder 26 via a link 25, and can be moved horizontally by expansion and contraction of the hydraulic cylinder 26. Also, the spline shaft 24
Has a chain sprocket 27 and a hydraulic motor 28 (FIGS. 1 and 2) via a chain meshing with the chain sprocket 27.
It is connected to. Thus, the through shaft 20 is
1. When the spline shaft 24 is disposed on the axis of the spline shaft 24 and projects from the drive post 4,
1 and the sliding shaft 2
2 is pushed out and inserted into the bearing 31.
In this state, the spline shaft 24 rotates, and the cable drum D rotates via the shaft 20.

As shown in FIGS. 8 and 9, below the spline shaft 24 of the driving post 4, a positioning block 34 is provided.
However, below the bearing 31 of the fixed post 3, positioning blocks 35 are provided to face each other. V-shaped recesses 34a, 35a are provided in the upper portions of the positioning blocks 34, 35 for receiving the bearings 36, 37 at the ends of the through shaft 20 and arranging them at predetermined support positions.

In the cable drawing work vehicle of this embodiment, the cable drum D is mounted on the moving saddle 12 disposed on the rear side of the loading platform 1, the hydraulic cylinder 9 is extended, and both the cable drum D and the moving saddle 12 are moved. Lifting rail 5
To rise. In addition, the penetration shaft 20 is previously mounted on the cable drum D. The moving saddle 12 is raised, and the penetrating shaft 20 of the cable drum D resting on the post 3,
When the position reaches a predetermined height position higher than the positioning blocks 34 and 35 of No. 4, a limit switch (not shown) is operated, and oil supply to the hydraulic cylinder 9 is stopped. In this state,
The rod 14b of the hydraulic cylinder 14 is extended, and the movable saddle 12 is moved forward along the elevating rail 5. The moving saddle 12 stops between the fixed post 3 and the driving post 4 of the cable drum supporting device 2 in front of the loading platform 1.
During this time, the cable drum D rests on the movable saddle 12 and passes through the space between the fixed post 3 and the drive post 4 behind the carrier 1 without difficulty. When the cable drum D comes between the posts 3 and 4, the hydraulic cylinder 9 is contracted to lower the lifting rail 5, and the penetrating shaft 20 is lowered onto the positioning blocks 34 and 35. Bearings 36 and 37 at both ends of the through shaft 20
Are positioned at predetermined positions while being guided by the V-shaped recesses 34a, 35a of the blocks 34, 35, the axes of the through shaft 20, the spline shaft 24, and the bearing 31 coincide. When the hydraulic cylinder 26 is extended in this state, the spline shaft 24 is fitted into the spline fitting portion 23 of the barrel 21, and at the same time, the sliding shaft 22 is pushed out and inserted into the bearing 31.
Thus, the cable drum D is mounted on the cable drum support device 2 at the front. The spline shaft 24 and the fitting portion 2
At the time of fitting with 3, the fitting portion 23, that is, the through shaft 20 needs to be slightly rotated together with the drum D in order to mesh with each other. At this time, since the bearings 36 and 37 at both ends of the through shaft 20 are mounted on the V-shaped recesses 34 a and 35 a of the blocks 34 and 35, the through shaft 20 is relatively lightly loaded regardless of the load of the drum D. Can be rotated. Next, the lifting rail 5 and the movable saddle 12 are restored, and the same operation is performed to mount the cable drum D on the cable drum supporting device 2 behind the loading platform 1. Thus, after the cable drum D is mounted on the four cable drum supporting devices 2 on the front, rear, left and right sides of the loading platform 1, the hydraulic motor 28
To rotate the cable drum D via the spline shaft 24 and the shaft 20 to feed out the cable wound therearound, or wind up the cable, the pulling wire and the like.

When the cable drum D is detached from the cable drum supporting device 2, first, the spline shaft 24 is retracted to restore the sliding shaft 22, and the engagement with the cable drum supporting device 2 is released. Next, the moving saddle 12 is brought to the position of the cable drum supporting device 2 at the rear, and is raised to push up the cable drum D from below, so that the penetrating shaft 2
0 is lifted onto the positioning drums 34, 35. Thereafter, when the movable saddle 12 is retracted to a predetermined position and the hydraulic cylinder 19 is extended, the saddle main body 17 stands up, and the cable drum D thereon rolls down on the carrier 1. Next, the movable saddle 12 is recovered, brought to the position of the cable drum support device 2 in front, and the same operation is performed to remove the cable drum D.

The present invention is not limited to the illustrated embodiment. For example, the spline shaft 2 of the driving post 4
4, a positioning block is provided above the bearing 31 of the fixed post 3, and a V-shaped recess is provided below these positioning blocks.
The bearings 36 and 37 at the ends of the through shaft 20 can be disposed at predetermined support positions by contacting the recesses from below with the recesses. In this case, the bearings 36 and 37 of the penetrating shaft 20 of the cable drum D lifted by the lifting device 6 are positioned from below by contacting the recesses of the positioning block. Accordingly, the elevating device 6 is controlled so as to stop the ascending operation upon detecting that the bearings 36 and 37 have contacted the recesses of the positioning block, and to descend after the spline shaft 24 is fitted to the through shaft 20. (The specific mechanism was proposed in Japanese Patent Application No. 3-28482). The penetrating shaft 20 of the cable drum D is connected to the spline shaft 24 in a state of being pressed against the concave portion of the block. However, since the bearings 36 and 37 are in contact with the concave portions of the block, the penetrating shaft 20 is The spline rotates relatively easily with respect to the positioning block, and the peaks and valleys of the spline are easily engaged.

[0016]

As described above, in the present invention, the fixed post 3 and the drive post 4 are provided on the carrier 1 so as to face each other on the left and right sides, and the cable drum is provided between the fixed post 3 and the drive post 4. A moving device for raising D to a predetermined height and horizontally moving it to the position of the fixed post 3 and the driving post 4 is provided, and a detachable through shaft 20 is provided to penetrate the center of the cable drum D. The penetrating shaft 20 is composed of a shaft cylinder 21 and a sliding shaft 22 inserted inside the shaft cylinder slidably in the axial direction, and a spline fitting portion 23 is provided at one end of the shaft cylinder 21. The sliding shaft 22 is always urged by a spring 32 or the like in a direction in which the end is retracted into the barrel 21, and bearings 36, 3 are provided on the outer periphery of both ends of the barrel 21.
7, and a positioning block 34 having a V-shaped concave portion 34 a for allowing the bearing 36 at one end side of the through shaft 20 to abut on the drive post 4 and disposing it at a predetermined shaft support position.
And a spline shaft 24 is provided by a hydraulic mechanism so that the spline shaft 24 can protrude and retract horizontally to the fixed post 3 side and can be rotated by a motor 28. When the spline shaft 24 projects, the spline shaft 24 is fitted into the spline fitting portion 23 of the barrel 21. At the same time, it is configured such that one end of the sliding shaft 22 can be pushed to project the other end from the other end of the shaft cylinder 21.
A positioning block 35 having a V-shaped recess 35a for abutting the bearing 37 at the other end of the through shaft 20 and disposing the bearing 37 at a predetermined shaft support position is provided. Sliding shaft 22 protruding from shaft cylinder 21
Is provided with a bearing 31 that can receive the other end of the cable drum, and the cable drum D attaching / detaching device for a wire drawing work vehicle is configured, so that the cable drum D can be quickly and reliably attached to and detached from the fixed post 3 and the driving post 4 as support devices. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a front view of a cable extension work vehicle.

FIG. 2 is a plan view of a cable drawing work vehicle.

FIG. 3 is a front view of the cable drum supporting device.

FIG. 4 is a vertical sectional front view of a driving post.

FIG. 5 is a cross-sectional plan view of a drive post.

FIG. 6 is a sectional view of a through shaft.

FIG. 7 is a perspective view of a stator.

FIG. 8 is a front view of a positioning block on the drive post side.

FIG. 9 is a front view of a positioning block on the fixed post side.

FIG. 10 is a front view of a lifting rail.

FIG. 11 is a plan view of a lifting rail.

FIG. 12 is a side view of a lifting rail.

FIG. 13 is a front view of the moving saddle.

FIG. 14 is a side view of the moving saddle.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 loading bed 2 cable drum supporting device 3 fixed post 4 drive post 6 elevating device 12 moving saddle 20 penetrating shaft 21 barrel 22 sliding shaft 23 spline fitting portion 24 spline shaft 26 hydraulic cylinder 27 sprocket 31 bearing 32 spring 34 positioning block 34a Recess 35 Positioning block 35a Recess 36 Bearing 37 Bearing D Cable drum

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Junichi Shionoya 6-5-19 Minamishinagawa, Shinagawa-ku, Tokyo Sanwa Tekki Co., Ltd. (56) References JP-A-5-304708 (JP, A) JP-A-63-178710 (JP, A) JP-A-49-103191 (JP, A) JP-A-4-118705 (JP, U) JP-A-4-24565 (JP, U) JP-A-4-97412 (JP) , U) Japanese Utility Model Showa 54-41988 (JP, U) Japanese Utility Model Showa 62-183669 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 1/02 H02G 1/06 B60P 3/00

Claims (1)

(57) [Claims] 1. A fixed post and a driving post are provided on a loading platform so as to face each other, a cable drum is raised to a predetermined height between the fixed post and the driving post, and a position of the fixed post and the driving post is set. While a moving device for horizontal movement is provided, a detachable through shaft is provided so as to penetrate the center of the cable drum, and the through shaft is slidably inserted into the shaft cylinder and inside thereof so as to be slidable in the axial direction. A spline fitting is provided at one end of the barrel, and the sliding shaft is always urged in the direction to retract the end into the barrel. The driving post is provided with a positioning block having a V-shaped recess for abutting a bearing on one end side of the through shaft and arranging the driving post at a predetermined shaft support position, and a hydraulic mechanism is used to provide the positioning block. Fixed post A spline shaft is provided so as to be able to protrude and retract horizontally to the side, and can be rotated by a motor. When the spline shaft is projected, the spline shaft is fitted into a spline fitting portion of the barrel, and one end of the sliding shaft is pushed by pushing one end of the sliding shaft. Is configured to be able to protrude from the other end of the barrel, and a V-shape for placing the bearing at the other end of the through shaft on the fixed post at a predetermined shaft support position by contacting the bearing at the other end of the through shaft. A positioning block having a concave portion is provided, and a bearing that can receive the other end of the sliding shaft protruding from the shaft cylinder is provided opposite to the spline shaft, and between the fixed post and the driving post. A cable drum attaching / detaching device for a wire drawing work vehicle, wherein the cable drum is made detachable.