JPS5895912A - Device for raising cable drum - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION When a drum around which a cable is wound is used for wire extension work, both ends of a shaft passing through the drum must be lifted to support the drum in a rotatable manner. The present invention relates to a lifting device that achieves this objective with the same jack, regardless of the size of the drum diameter.

Examples will be described with reference to the drawings. The stand S is a rectangular body in which the upper ends of two cylindrical guide rods 2.degree. 2 standing upright on a base L are joined by a top plate 3. The slider 4 also has both sides 5,
It is a rectangular body with a bottom side 6 and a top side 7, and both sides are made of angle members that are opened outward, and can be moved up and down along guide rods 2, 2 by these sides. Further, a plurality of shelf boards 5a are provided on both sides of the shelf board and project inwardly in a symmetrical manner, and each shelf board is provided with a notch 5b at one end thereof.

As shown in FIG. 4, the shaft holder 8 has a pair of rollers 9, 9 rotatably supported on the upper surface of a substrate 8a, and six edges 8b are provided on the lower surface of the substrate. The mandrel holder 8 can be inserted between the opposing upper and lower shelf boards, and when inserted, the 6 edges 8b will fit into the notch 5 of the shelf board.
If you get stuck in b, it will be decided by 1 place.

A jack J is placed on the base 1 and is capable of pushing up the bottom side 6 of the slider with its upper end.

Although this device is constructed as described above, wheels 11 are attached to one side of the base for ease of transportation. When the stand is folded down, this +-li wheel allows transport like a cat cart.

In this device, one pair is placed at both ends of the drum shaft. Assume that the drum shaft B is now at the height position shown in FIG. Select a shelf board so that the mandrel holder 8 is closest to the bottom surface of the mandrel B, insert it as shown in the figure, and position it with the protrusion h18b.

When the jack J is operated in this state and the slider is pushed up, the roller of the mandrel holder comes into contact with the mandrel B.

If the drum is pushed up slightly, it will leave the ground and become rotatable, allowing the wire extension work to begin. During wire extension work, the drum mandrel is likely to float due to the traction force applied to the cable and detach from the mandrel holder. If it is necessary to avoid this, a mandrel restrainer 10 is used as shown in FIG. The mandrel retainer 10 is a rectangular plate whose central part is arc-shaped and which is secured to the upper shelf board of the mandrel B at both ends.The vertical distance between the shelf boards is set to a size suitable for inserting the mandrel retainer. I'll keep it.

As described above, in the present invention, the mandrel is not lifted directly by a jack, but is pushed up via a ladder-shaped slider. In addition, since the shaft holder attached to the slider is attached to a suitable shelf board, the interval of elevation and descent by the jack can be extremely short, regardless of the diameter of the drum. Conventionally, devices used for the same purpose used a jack directly to push up the mandrel, so if the diameter of the drum was too large for the stroke of the jack used, it was necessary to install another spacer under the jack, or Or I had to replace it with a large jack with a longer stroke. The feature of the present invention is that this expression is removed.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device, Fig. 2 is a side view, Fig. 3 is a cross-sectional view taken along the line AA, Fig. 4 is a perspective view of the mandrel holder, and Fig. 5 is an explanatory diagram of the state in which the mandrel retainer is installed. It is. 1...Base, 2...Guide rod, 3...Top plate, 4...Slider, 5...Side side, 5a...
Shelf board, 5b...notch, 6...bottom, 7...
Top side, 8... Mandrel holder, 8a... Board, 8b...
- Curved edge, 9...roller, 10...mandrel retainer, 11...wheel, B...mandrel, J...jacket, S...stand. Patent applicant: Sanwa Chikki Co., Ltd. Figure 1 Figure 3 Figure 4 Figure 5 49-

Claims (1)

[Claims] A rectangular stand consisting of the upper ends of two guide rods standing upright on the base joined by a top plate, both sides, the bottom and the top side, which can be raised and lowered along the guide rods of the stand, and 6 symmetrical inside to the left on both sides. A rectangular slider equipped with a plurality of shelves protruding from the slider, a mandrel holder having a pair of opposing rollers that can be inserted and placed between the opposing shelves of the slider and capable of supporting the mandrel of the cable drum, and a mandrel holder that is fixed on the base. A cable drum lifting device comprising a jack that can push up the bottom side of a slider, and a pair of jacks are arranged at both ends of a cable drum shaft.