KR200355193Y1 - safety device of air balancer - Google Patents

Abstract

The air balancer prevents the hook from rising due to the rapid rotation of the reel drum inside the balancer during sudden operation of the pendant switch (push button) during the hoisting operation to ensure safety. ,

The safety device for an air balancer according to the present invention includes a cylindrical housing forming a chamber, a slidably installed inside the housing, a piston reciprocating upon supply of compressed air, and a ball fixed at both ends so as not to rotate inside the housing. And a reel drum movably coupled to the ball screw and rotating the piston when the piston is moved by the supply of compressed air, and a pendant switch for controlling the supply and discharge of compressed air from the air supply to the chamber. In the air balancer,

The above-mentioned pendant switch,

Levers and down levers that control the supply and discharge of compressed air to the chamber,

A body mounted in a passage communicating with the inlet and outlet of the compressed air, and having a cylinder for selectively opening and closing the compressed air inlet and outlet by sliding the spool during the operation of the lever and the down lever;

It is mounted on the body to adjust the stroke of the lever, and is provided with a speed adjustment adjusting bolt for preventing the hook from rising sharply during rapid operation of the lever over a predetermined pressure.

Description

Safety device of air balancer

The present design prevents the hook from rising rapidly due to the rapid rotation of the reel drum inside the balancer during sudden operation of the UP LEVER of the pendant switch (referring to the push button) by using an air balancer. It relates to a safety device for an air balancer to ensure the safety.

More specifically, the reel drum in which the wire rope is wound is rotated in the forward and reverse directions when compressed air is supplied to arbitrarily adjust the lever stroke of the pendant switch that raises and lowers the hook of the air balancer that lifts the work. It relates to a safety device for the air balancer to control the rising speed of the hook.

In general, when assembling and mounting at a predetermined position in a state of lifting light and heavy items, such as in an automobile production line, by driving a cylinder reciprocating within a predetermined stroke range by supplying air pressure during a switch operation by an operator. Air balancers are frequently used to lift and lower items towed by the hooks that are lifted.

1 and 2, the air balancer according to the prior art has a cylindrical housing (2) formed with a chamber (1) in which compressed air is introduced and discharged from an air supply source when the pendant switch (P) is operated. The ball screw 5 is fixed at both ends by the fastening members 3 and 4 so as not to rotate inside the housing 2, and is mounted at one end of the housing 2 to seal the chamber 1 and compressed air. The inlet and outlet manifolds 6 with holes are provided with end caps 7 mounted on the outer one side.

In addition, the piston (8) reciprocating along the inner circumference of the housing (2) by the compressed air flowing into the chamber (1) through the manifold (6), and the ball nut (one end is coupled to the ball screw 5) 9, the other end is rotatably supported on the piston 8 by the bearing 10, so that the reel drum 12 is rotated along the ball screw 5 when the piston 8 moves so that the wire 11 is wound. ).

Therefore, since the compressed air discharged from the air supply source flows into the chamber 1 of the housing 2 through the manifold 6 when the user operates the lever P1 of the pendant switch P by the user, the piston 8 is slidably moved to the left in the drawing of FIG. 2 along the inner circumference of the housing 2.

The reel supported on the ball screw 5 by the ball nut 9 is moved axially while the reel drum 12 supported as the bearing 10 by the piston 8 is moved due to the linear movement of the piston 8. As the drum 12 is rotated, the wire 11 is wound around the outer periphery of the reel drum 12.

On the other hand, when the down lever P2 of the pendant switch P is pressurized, as the compressed air inside the chamber 1 is discharged into the atmosphere through the manifold 6, the reel drum 12 is a ball screw. As shown in FIG. 2 while being rotated along (5), the wire 11 wound on the drum 12 is loosened because it is moved in the right direction. This makes it possible to lower the workpiece being towed to the hook (H).

On the other hand, during the operation of the above-mentioned pendant switch (P), when pressurizing the lever (P1) of the pendant switch (P) above a predetermined pressure, a large amount of compressed air is instantaneously introduced into the chamber (1) The reel drum 12 is rapidly rotated.

As a result, the hook H is rapidly raised (approximately about 1 M per second) and the workpiece towed by the hook H hits the worker, causing a safety accident. In view of this, a safety device having a quick brake function is separately installed to prevent sudden rotation of the reel drum 12.

That is, it is installed in the compressed air inlet air hose (h) of the pendant switch (P), and the inner spool (not shown) is switched when a quick operation of the lever (P1) to a predetermined pressure or more to the chamber of the housing 2 (1) is provided with a safety device (S) to prevent the sudden rise of the hook (H) due to the rapid rotation of the reel (12) by releasing the compressed air flowing into the atmosphere.

As such, when additionally installing the safety device (S) to the pendant switch (P) in order to prevent the sharp rise of the aforementioned hook (H), the cost cost is increased due to the increase in the number of parts, thereby the price competitiveness There is a problem falling.

An object of the present invention is to provide a safety device for air balancer to secure safety by preventing the hook from rising sharply as the user adjusts the rising speed of the hook by arbitrarily adjusting the lever stroke of the pendant switch for the air balancer. In providing.

Another object of the present invention is to eliminate the sudden rise of the hook due to the misoperation of the pendant switch, so that a separate brake device is unnecessary, so that the cost of the air balancer can be significantly reduced by reducing the number of parts. To provide a safety device.

1 is a schematic diagram of an air balancer pendant switch according to the prior art;

2 is a schematic cross-sectional view of an air balancer driving unit according to the prior art;

3 is a schematic view of a safety device for an air balancer according to the present invention;

Figure 4 is an enlarged view of the main portion extract of the safety device for an air balancer according to the present invention,

Figure 5 (a, b) is a state diagram using the safety device for an air balancer according to the present invention.

* Explanation of symbols used in the main part of the drawing

One; chamber

2; housing

5; Ball screw

6; Manifold

8; piston

11; wire

12; Reel drum

13; Body

14; Adjusting bolt

15; Through hole

16; Spool

17; Screwman

H; hook

P; Pendant switch

An object of the present invention described above, the cylindrical housing forming the chamber, the sliding movement is installed inside the housing and the piston reciprocating during the supply of compressed air, ball screws fixed at both ends so as not to rotate inside the housing, The air balancer is movably coupled to the ball screw and has a reel drum which is rotated when the piston moves to the compressed air supply to wind the wire fixed to the hook, and a pendant switch which controls the supply and discharge of the compressed air from the air supply to the chamber. In

The above-mentioned pendant switch,

Levers and down levers that control the supply and discharge of compressed air to the chamber,

A body mounted in a passage communicating with the inlet and outlet of the compressed air, and having a cylinder for selectively opening and closing the compressed air inlet and outlet by sliding the spool during the operation of the lever and the down lever;

It is attached to the body to adjust the stroke of the lever, and achieved by providing a safety device for the air balancer, characterized in that it comprises a speed adjusting adjustment bolt for preventing the hook from rising sharply when the lever is suddenly operated above a predetermined pressure. do.

According to a preferred embodiment, the through-bolt is formed so as to face the above-mentioned speed adjusting adjustment bolt end, and has a through hole which can adjust the stroke of the lever according to the rotation direction of the adjusting bolt.

In addition, the inclined surface is formed on the outer periphery of the spool for opening and closing the passage so as to adjust the compressed air inflow in response to the pressure of the above-mentioned lever.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to be described in detail so that those skilled in the art to which the present invention pertains can easily implement the present invention. It does not mean that the technical spirit and scope of the invention is limited.

As shown in Figures 3 to 5, the present invention, the cylindrical housing (2) forming the chamber (1), and the slidingly installed inside the housing (2) as an air supply source (not shown) Piston 8 reciprocating when supplying compressed air to the chamber 1 through the manifold 6 on the side surface, ball screws 5 on which both ends are fixed so as not to rotate inside the housing 8, and ball screws. A reel drum 12 which is movably coupled to (5) and which rotates upon movement of the piston 8 to wind the wire 11 on which the hook H is fixed, and controls the supply and discharge of compressed air to the chamber 2. Applied to the air balancer having a pendant switch (P) to be, they are regarded as the same as the conventional one, the detailed description of the configuration and operation thereof is omitted, and the duplicate reference numerals are the same.

Pendant switch (P) of the safety device for an air balancer according to the present invention,

A lever (P1) and a down lever (P2) for controlling the supply and discharge of compressed air to the chamber (1) described above;

It is mounted in the passage 30 communicating with the compressed air inlet (13a) and the outlet (13b), the spool (16) is slidably moved during operation of the lever (P1) and the down lever (P2) and the compressed air inlet (13a) and A body 13 having a cylinder 20 for selectively opening and closing the outlet 13b;

Speed adjustment adjusting bolt 14 is mounted on the body 13 to adjust the stroke of the above-mentioned lever (P1), and prevents the hook (H) from rising sharply during rapid operation of the lever (P1) above a predetermined pressure. It is provided.

At this time, the penetrating through the lever (P1) is formed to face the end of the above-described speed adjustment adjustment bolt 14, the through to adjust the stroke of the lever (P1) in accordance with the rotation direction of the adjustment bolt (14) by a driver or the like. Ball 15 is provided.

In addition, the inclined surface 16a is formed on the outer circumference of the spool 16 for opening and closing the passage 30 so that the compressed air inflow amount can be adjusted in response to the pressurization degree of the lever P1 described above.

PS in the figure is a safety spring to protect the pendant switch (P) from the outside.

Hereinafter, an example of using the safety device for an air balancer according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 4 and 5 (a, b), in order to lift the workpiece towed to the hook (H) described above, by pressing the lever (P1) of the aforementioned pendant switch (P) On the drawing, the spool 16 of the cylinder 20, which is slidably moved up and down in the body 13, is lowered in the lower direction.

Due to this, the compressed air discharged from the air supply source (not shown) passes through the passage 30 opened by the compressed air inlet 13a-the spool 16 of the body 13-the compressed air outlet 13b. Then, as it is supplied to the chamber 1 of the above-described air balancer through an air hose not shown, the piston 8 in the housing 2 is slidably moved, and the reel drum 12 is moved by the movement of the piston 8. Rotate). The hook H is lifted by the wire 11 wound on the reel drum 12.

At this time, when the spool 16 is lowered according to the pressure of the above-mentioned lever P1, the discharge port of the passage 30 is adjusted by the inclined surface 16a formed at the outer circumference of the spool 16, so that the inflow into the chamber 1 is performed. The amount of compressed air can be adjusted.

Therefore, since the amount of air flowing into the chamber 1 is adjusted according to the pressure of the lever P1 by the user, the rising speed of the hook H can be controlled.

On the other hand, during the hoisting operation of lifting the hook H by the above-mentioned handle P1 operation by the operator, it is possible to prevent the above-mentioned handle P1 from being rapidly operated above a predetermined pressure.

By adjusting a height of the adjusting bolt 14 mounted on the body 13 of the pendant switch P by inserting a tool such as a driver into the through-hole 15 formed through the above-mentioned levers P1, the levers The stroke of P1 can be arbitrarily adjusted.

For this reason, even if the operator presses the lever P1 with an excessive force, it is possible to prevent the lever P1 from being completely pressed by the adjusting bolt 14.

Therefore, even when the lever P1 is operated by the operator at a predetermined pressure or more, a large amount of compressed air is supplied to the chamber 1 instantaneously, and the sharp rise of the hook H is caused by the rapid rotation of the reel drum 12. Can be prevented.

As described above, in order to prevent the sudden rise of the hook (H) due to the misoperation of the lever (P1) it is unnecessary to install a safety device having a brake function to reduce the cost cost and ensure safety Workers can be protected.

As described above, the safety device for an air balancer according to the present invention has the following advantages.

By arbitrarily adjusting the lever stroke of the air balancer pendant switch, the user adjusts the speed of the hook rise, thereby preventing the hook from rising rapidly and creating a pleasant working environment to protect the worker from safety accidents.

In addition, since a separate brake device for preventing the spike of the hook is unnecessary due to the misoperation of the pendant switch, the cost can be reduced by reducing the number of parts and reducing the cost.

Claims (3)

Cylindrical housing forming the chamber, the sliding movement is installed in the housing and the piston reciprocating when supplying compressed air, ball screws fixed at both ends so as not to rotate inside the housing, and movable coupled to the ball screw In the air balancer having a reel drum which is rotated when the piston moves to the compressed air supply to wind the fixed wire, and a pendant switch in the chamber to control the supply and discharge of the compressed air from the air supply source. The pendant switch, A lever and down lever for controlling supply and discharge of compressed air to the chamber; A body mounted in a passage communicating with the inlet and outlet of the compressed air, and having a cylinder for selectively opening and closing the compressed air inlet and outlet by sliding the spool during the operation of the lever and the down lever; Safety device for an air balancer is mounted to the body so as to adjust the stroke of the lever, and a speed adjustment adjusting bolt for preventing the hook from rising sharply when the handle is suddenly operated above a predetermined pressure. The air balancer as set forth in claim 1, further comprising a through hole formed to penetrate the lever to face an end of the speed adjusting adjustment bolt, and adjusting or adjusting the stroke of the lever according to the rotation direction of the adjustment bolt. safety device. The safety device for an air balancer according to claim 1 or 2, wherein an inclined surface is formed on a spool outer periphery for opening and closing the passage so as to adjust the amount of compressed air inflow corresponding to the pressurization degree of the lever.