JPS5912081A - Lifting gear - 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 [Technical Field of the Invention] The present invention relates to an improved lifting device for lifting a heavy annular object.

[Technical background of the invention]

In recent years, as the capacity of electrical equipment has increased, the instrument transformers used in these equipment have also become larger. For this reason, the iron cores of transformers, or toroidal cores, are also becoming larger, and the larger ones are about to become electric switches weighing several hundred kilograms. It was a very difficult task to lift this heavy toroidal core safely and easily, and also to do so without applying an unbalanced load to the toroidal core during lifting.

Therefore, conventionally, a hanging rope was wound around and attached to three equally distributed positions of the toroidal core, and a hanging-E gero method was used.

[Problems with background technology]

However, the above method requires large size and large 1R
It is necessary to accurately measure the position at which the hanging rope is wound around the 1iL toroidal core. ``There is still a risk that the toroidal core may be deformed depending on the angle of the hanging rope. There were problems such as it took time to wind and attach the hanging rope to the trench, and the work required many people to work in the trench.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and its purpose is to be able to safely and easily lift heavy objects to be lifted and fried without applying excessive force. It is an object of the present invention to provide a hanging device.

[Invention 1! ¥1 required] In order to achieve this object, the present invention fixes a fixed support member to the lower end of a vertically disposed center rod having a hanging portion at the top, and also slides a movable support member onto the center rod. one end of each of the upper 41+11 arm and the lower arm is connected to the fixed support member and the movable support member via the hinge b, so that the upper arm and the lower 1llll arm move in the same plane. The receiver is connected to the claw member via the other end and the hinge, and as the '=I movement support fitting slides up and down the center rod, the receiver is connected to the claw member so that the distance in the radial direction between the claw member and the center rod increases. A feature of the movable support that can be contracted and expanded is that by forming a claw portion, the heavy object to be lifted can be lifted safely and easily without applying excessive force. Note that it is preferable that the movable receiver has three sets of claws arranged at three equal intervals around the center rod.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A suspension and beard device according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a hanging portion a having a button hole (12a) at the top of the center rod Qll is provided. A fixed support member (13) is fixed to the lower end of this center rod circle, and a movable support member (151) that can be slid freely by inserting it into the center rod (1) is provided above the fixed support member (131). One end of the upper arm and the lower arm are rotatably attached to the fixed support member (1-31) via hinge 00, and the other end of each is attached to the fixed support member (1-31) via hinge 0. The upper 11411 arm 07 and the lower 11I rear arm (181 are rotatably attached to the member (21) and move in the same plane as the movable support member 09 moves one step down along the center rod (11). At the same time, the receiver forms a claw part (21) so that the distance in the radial direction becomes shorter or longer in the radial direction around the center rod θ1). Note that the catch member 1'1B is formed in an L-shape outward 111II with respect to the center rod 01).

Further, a catch is provided between the movable support member 09 and the fixed support member α. The catch is the center rod (1) of the claw operation part.
A rotary plate 12e that can be freely rotated by means of a handle (a) is attached to one field side of υ. The rod (21
The tip (z7a) of one of the rods is rotatably attached, and the other tip (27b) of the rod (2) is attached to the fixed support member (13).
Rotatably attached to 1. For installation on the rotating plate □□□, one tip (28a) of the rod (toward) is rotatably attached at a position almost diametrically opposite to the tip (27a) of the nine-rod arm; ) is the movable support member (I5
), and the rod near the entrance of this hole (
A boxwood (28b) is provided at the position of the second camphor tree. Boxwood (z8b)
When the catch member is opened to the maximum, that is, when the radial distance between the catch member and the center rod (lυ) is maximum, the boxwood (zsb) The movable support member (
A lock nut is installed on the upper side of the first jet via the center rod (Ill screw (1xa)).

As shown in FIG. 2, the movable receiver has three sets of claws (21), each disposed at approximately three equal intervals on the outer circumference with the center rod Uυ as the center.

Next, the effects of the present invention will be explained. Raise the lock nut (C) to the upper part of the center rod (11) in advance, and place the movable support member (I) on the center rod 01 in accordance with the inner diameter of a heavy object formed in an annular shape, such as a toroidal core. By pulling it upward, the receiver shortens the distance in the radial direction of the claw part (a), and the receiver inserts the claw member into the center of the toroidal core rod.

Next, when the movable support member α9 is gradually lowered, the distance in the radial direction between the claw member (a) and the center rod Uυ becomes longer, and the catch is pushed under the toroidal core (to) by the claw member -. Once the center rod (11) is inserted tightly into the side, hook the center rod (11) (not shown) through the hanging hole 1za) of the hanging rod (not shown) and lift the center rod (11) a little. When the weight of the α wheel is applied, the catch is pressed toward the toroidal core (G) so that the distance in the radial direction is further extended. Tighten the lock nut in this condition. During this operation, the claw operating part (28b) of the receiver is pushed downward (fill) by the movable support member (1), and the rotary plate (c) and the handle C51 remain in the position shown in the figure. Furthermore, by suspending the hanging part a3, the toroidal core (to) can be suspended by supporting the load evenly on the three equally distributed supports by the claw part (a).

If you wish to continue suspending the product, keep it in the above-mentioned state, loosen the lock nut (01) and raise it, and then turn the handle e of the claw operation part (c) evenly, i.e., as shown in the figure. Now, turn clockwise to push the movable support member [9] upward via the rod (2) and the boxwood (28b).

The movable support members (when one is pushed up, the claw member) is pulled toward the center rod aD by the arm αη and the handle,
The receiver is pulled out from the bottom of the claw member (2G is the toroidal core (to)), and the movable support member The lifting device can be removed from □□□.

In addition, if you place pillows on the toroidal core (an annular weight-like object like a tile) in three or four evenly distributed positions to float the heavy object, it will be easier to attach and detach the hanging device. Of course, this is a word.

〔Effect of the invention〕

As explained above, according to the lifting device of one embodiment of the present invention, the lifting operation is easy and safe without applying a biased load to the annular heavy object to be lifted.

[Brief explanation of drawings]

1 and 2 are a side view and a plan view showing a lifting device of the present invention. Oυ...Center rod, (121...Hanging part, (13
i...Fixed support member. 051...Movable support member, (1,61,QI...
Hinge. (17)... Upper arm, (le... Lower arm. (a)... The receiver is the claw member, (2υ... The moving cost is the claw part. Problem... The receiver is the claw operating part, (A) - Handle, (A)
... Rotating plate.゛D, +2) 11...Rod, @)...Toroidal Core Agent Patent Attorney Inoue -M@I Figure 2

Claims (2)

[Claims] (1) A fixed support member is fixed to the lower end of a vertically disposed center rod having a hanging portion at the top, and a movable support member is slidably inserted into the center rod, so that the fixed support member and the movable support member are slidably inserted into the center rod. One end of each of the upper arm and the lower arm is rotatably connected to the support member, and the other end of each is rotatably connected to the claw member so that the upper arm and the lower arm move in the same plane. The movable support member is freely connected and operates so that as the movable support member moves up and down the center rod, the holder forms a claw portion so that a radial distance between the claw member and the center rod is shortened or expanded. . A lifting device, characterized in that a pawl operating section is disposed between the fixed and movable support members for pushing up the movable support member. (2) In order to lift the annular heavy member, three sets of claws are arranged so that the claws are approximately equally spaced around the circumference υ of the center rod. A lifting device according to claim 1, in which a claw member is inserted.