JPH0676271U - Automatic sling removal device with spring balancer - Google Patents

Abstract

(57) [Summary] [Purpose] In an automatic sling removal device with a weight clamp, you can easily sling with a little force while lifting the weight clamp, and you can easily confirm the disengagement of the weight clamp when removing the sling. To do so. An automatic sling removal device comprising: a device main body having a weight clamp for slinging off a suspended object; and a swivel device for hanging the slant on a lifting machine and swiveling the device main body about a vertical axis. A spring balancer having a built-in spring is attached to the spring balancer, and the weight clamp is suspended by engaging the spring balancer with the weight clamp.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic slinging and removing device used when a suspended object such as a steel material is lifted and moved by a lifting machine such as a crane.

[0002]

[Prior art]

 Generally, in construction work and construction sites, a work such as lifting a heavy object such as steel material with a lifting machine such as a crane and moving it to a predetermined place is performed. In this case, in order to maintain the stability of the suspended object, a wire rope or the like is usually used for slinging, and the sling is removed after moving to a predetermined place to receive the load. Of these sling removal operations, slinging is done manually, but slinging automatically appears, and an automatic slinging removal device that allows the suspended object to rotate in the direction suitable for receiving the load after moving is received. The present applicant has previously devised and filed an application (Practical application No. 2-96936). In other words, this automatic sling removal device suspends the turning device attached to the upper part of the device body on a lifting machine such as a crane, slings the clamp provided on the device body to the object to be lifted and lifts it with the lifting machine. When moved to a predetermined place, the turning device is operated to rotate the main body of the device about the vertical axis by a predetermined angle to change the suspended object to the direction suitable for receiving the load, and after receiving the suspended object, mount the sling. It is designed to be removed automatically.

[0003]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional automatic sling removal device, sling work is done manually, so if the clamp of the main body of the device is not so heavy with wire rope etc., sling work of the suspended object can be done easily, but the clamp In the case of a heavy chain, there is a problem that it takes a lot of time and labor to lift the clamp and sling it. Also, when automatically removing the balls after receiving the load, it is difficult to confirm whether or not the heavy clamp has come off the object to be lifted. There is a risk that an object may be dragged and a fall accident may occur. The present invention has been made in order to solve such a conventional problem, and can easily perform slinging work even when the clamp is formed of a heavy object, and easily detach the clamp when removing the ball. It is an object to provide an automatic sling removal device that can be confirmed.

[0004]

[Means for Solving the Problems]

 As a means for technically solving the above-mentioned problems, the present invention provides a device main body having a weight clamp for slinging off a suspended object, and a device for suspending the device main body while rotating the device main body around a vertical axis. In an automatic sling removal device equipped with a swivel device, a spring balancer with a built-in spring is attached to the device body, and the weight clamp is suspended by engaging the spring balancer with the weight clamp. It is a summary.

[0005]

[Work]

 Since the weight clamp is suspended by a spring balancer and held at a fixed location, it is not necessary to lift the weight clamp when slinging it, and the end of the weight clamp is pulled downward to sling it. Because it can be done, it can be done easily with less force. Also, when removing the ball from the clamp after receiving the load, the clamp is pulled up by the spring balancer and automatically detaches from the object to be hung, so it is possible to easily confirm the completion of ball removal.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a main body of the apparatus, which is provided with a swivel device 2 at the center of the upper part thereof, which is formed so as to be rotatable around a vertical axis Y by a predetermined angle, and has a pair of weight clamps at the lower part. Have three.

The weight clamp 3 is formed of a thick steel chain, and an engaging portion 3a for removing a sling is attached to the lower end, and the total weight is about 18 kgf on one side, which is considerably larger than that of a wire rope clamp. It has become a heavy load. The weight clamp 3 removes slings of the suspended object 4 such as steel material. The slings are manually removed by the operation connector 5 attached to the lower end of the clamp 3. The operation connector 5 is connected to the apparatus body 1 via a cord 6.

Reference numeral 7 is a spring balancer, which has a spring (not shown) inside so as to balance the suspended heavy object by adjusting the spring force. That is, the spring balancer 7 is installed oppositely by hooking the upper hook 7a thereof to the lower portion of the apparatus main body 1, hooking the lower hook 7b to the main part of the weight clamp 3 and connecting the spring to the internal spring via the wire rope 7c. Engagement is performed to balance the gravity of the weight clamp 3 with the pulling force (lifting force) of the spring balancer 7 by the spring. As a result, the weight clamp 3 is suspended at the P position shown by the chain double-dashed line.

The turning device 2 has a hooked portion 2a for hanging it on a lifting machine (not shown) such as a crane. As shown in FIG. 2, the turning device 2 is for power to rotate the device body 1 in the Y-axis. A connector 2b and a control connector 2c for controlling the rotation angle of the connector 2b are provided, and are configured to be freely operated from the operation room by a wireless device or by wire in the field.

A pair of pre-suspension jigs 8 are provided on the apparatus main body 1 so that they can be operated by winches 9 installed on the upper portion of the apparatus main body 1, which uses the weight clamp 3. This is to allow other objects to be lifted when not doing so. Reference numeral 10 is a wire rope for connecting the device body 1 and one weight clamp 3 for ensuring safety.

The automatic sling removing device with a spring balancer according to the present invention is constructed as described above. To use the sling removing device, first, hook a lifting machine such as a crane on the hooked portion 2a of the turning device 2. The pair of weight clamps 3 are suspended and pulled down from the P position to the Q position against the spring of the spring balancer 7, and the engaging portions 3a are slid on the suspended object 4, respectively. At this time, since the weight of the weight clamp 3 balances the pulling force of the spring of the spring balancer 7, it is not necessary to lift the clamp to support the entire weight as in the conventional case, but it is necessary to pull it down from the P position to the Q position. All that is required is to apply sufficient force, and slinging work can be easily performed with very little force.

After that, the object to be hung 4 is moved to a predetermined place while being lifted by a lifting machine such as a crane, and a signal is sent to the power connector 2b of the turning device 2 to move the device main body 1 at a predetermined angle around the Y axis. It is rotated and stopped at the control connector 2b, whereby the suspended object 4 is positioned in a direction suitable for receiving the load and the load is received.

After receiving the load, when a signal is sent to the connector 5 and the ball is automatically removed, the weight clamp 3 is pulled up by the restoring force of the spring of the spring balancer 7, and the weight clamp 3 is detached from the suspended object 4 and moved from the Q position. Return to P position. Therefore, it is possible to easily confirm that the weight clamp 3 is completely separated from the object to be suspended 4.

After confirming the completion of removing the balls, the lifting machine such as a crane is pulled back to prepare for the next lifting work. During this pullback, the weight clamp 3 does not sway, so that it is possible to prevent accidents such as hitting in the middle to damage the operating connector 5 or pulling and disconnecting the cord 6. The preliminary hanging jig 8 is pulled up so as not to get in the way.

[0015]

[Effect of device]

 As described above, according to the present invention, in the automatic sling removing device having the weight clamp, since the weight clamp is hung by the spring balancer and held at a certain position, it is necessary to lift the weight clamp when slinging. Instead, pulling the end of the weight clamp downward allows slinging, and the slinging work can be easily performed with a small amount of force. In addition, if the balls are removed automatically after receiving the load, the weight balancer will be lifted by the spring balancer and will surely separate from the object to be hung, so it is possible to easily confirm the completion of the balls removal. It also has the effect of ensuring safety.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device main body 2 ... Swivel device 2a ... Hanging part 2
b ... power connector 2c ... control connector 3 ... weight clamp 3a ...
Engagement part 4 ... Suspended object 5 ... Operation connector 6
... Cord 7 ... Spring balancer 7a ... Upper hook 7b ... Lower hook 7c ... Wire rope 8 ... Preliminary hanging jig 9 ... Winch 10 ... Wire rope

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Taichi Nakayama 8 2-3 Tanimachi, Chuo-ku, Osaka City Eagle Clamp Co., Ltd. (72) Minor Toyooka 8 2-3 3 Tanimachi, Chuo-ku, Osaka City Eag Inside Le Clamp Co., Ltd. (72) Inventor Hatsue Tsuyama 8 2-3 Tanimachi, Chuo-ku, Osaka Eagle Clamp Co., Ltd

Claims (1)

[Scope of utility model registration request] 1. An automatic sling removal device including a device main body having a weight clamp for slinging off an object to be hung, and a swivel device suspended from a lifting machine and swiveling the device main body about a vertical axis, An automatic sling remover with a spring balancer, characterized in that a spring balancer having a built-in spring is attached to the apparatus body, and the weight clamp is suspended by engaging the spring balancer and the weight clamp.