KR100738941B1 - The elevator of stage setting apparatus having a safety device - Google Patents

Abstract

An elevator having a safety device is provided to reduce manufacturing cost by installing a safety device that prevents falling of a stage device by limiting rotation of a wire drum and prevents quick braking of the stage device. The elevator having a safety device includes a wire drum(10), a decelerator(12), an elevation limiting member(20), a governing member(30) and a locking bar. The elevation limiting member(20) is installed on a side of the wire drum(10) and limits the rotation of the wire drum(10). The governing member(30) is installed on a frame(15) and operates to interlock with the elevation limiting member. The locking bar is installed on one side of the governing member(30) and prevents rotation of the drum(10) by limiting the operation of the governing member(30) and operating the elevation limiting member(20).

Description

Lifting device with safety device {The Elevator of Stage Setting Apparatus Having a Safety Device}

1 is a block diagram showing a lifting device equipped with a safety device according to the present invention.

Figure 2 is a side view of the elevating device with a safety device of the present invention.

3 is a cross-sectional view of a safety device that is a main component of the present invention.

Figure 4 is a reference diagram showing the braking form in the safety device of the main component of the present invention.

5 is a configuration diagram showing the governing portion of the safety device that is the main configuration of the present invention.

6 is a view showing the structure of the speed governing unit during automatic braking.

7 is a view showing the structure of the governor during manual braking.

8 is a view showing the structure of the speed governing portion when the speed limit.

<Explanation of symbols for main parts of the drawings>

10: wire drum 11: drive motor

12: reducer 13: axis of rotation

14: motor brake 15: frame

20: lifting limit member 21: bushing

22: hub 23: braking plate

24: rotating plate 25: touch gear

26: braking member 27: slip pad

30: governing member 31: governing gear

32: counterweight 33: fixed shaft

40: locking bar 41, 42: limit switch

43: Solenoid device for manual braking 44: Solenoid device for speed limit

The present invention relates to a lifting device for elevating a stage device, and in particular, by using a safety device of a simple structure to prevent the fall of the stage device by reducing the production cost and safety device to improve the safety It relates to a lifting device provided with.

In general, the stage device is lifted by a wire wound on a drum rotated by a drive motor. In other words, by rotating the drive motor forward or reverse, the wire is wound or unwound on the drum, and the stage device suspended on the end of the wire is lifted.

The lifting device of the stage device is provided with a fall prevention device for preventing the fall of the stage device to cause a safety accident. The fall prevention device blocks the rotation of the drum by using the centrifugal force generated when the drum of the lifting device is rotated faster than the prescribed speed.

However, the conventional fall prevention device has a structure including a one-way clutch, a ratchet gear, and a ratchet protrusion, such that the structure and operation relationship are complicated, making manufacturing and maintenance, difficult, and costly.

The present invention has been made to solve the above problems, produced by providing a safety device to prevent the sudden braking of the stage device by limiting the rotation of the wire drum to prevent the fall of the stage device, and lowering the speed by using the friction force And it is an object to provide a lifting device equipped with a safety device that is easy to maintain and repair and reduce the manufacturing cost.

In addition, the present invention allows the user to directly block the rotation of the wire drum in an emergency, as well as by limiting the operation of the safety device to be able to lift the stage device at a high speed to improve safety and at the same time improve the safety device The purpose is to provide a lifting device provided.

In addition, an object of the present invention is to provide a lifting device equipped with a safety device to improve the durability by limiting the rotation of the wire drum and at the same time stop the operation of the drive motor to prevent excessive load is applied to the rotating shaft of the wire drum.

According to the lifting device equipped with the safety device of the present invention for achieving the above object, by reducing the rotational force of the wire drum and the drive motor installed on the frame by lifting or unwinding the wire connected to the stage device; A lifting apparatus including a speed reducer for transferring to a wire drum, comprising: a lift limiting member provided at a side of the wire drum to limit rotation of the wire drum in an emergency; and installed in the frame and interlocked with the lift limiting member to operate. And a locking bar installed on one side of the governing member to restrict the operation of the governing member to operate the lift limiting member so that the wire drum is not rotated.

In addition, according to the lifting device provided with the safety device of the present invention, the lifting limiting member is a bushing coupled to the rotary shaft of the wire drum and the screw is formed on the outer peripheral surface, the hub screwed to the bushing and moved in the axial direction; A braking plate extending radially from one side of the hub, a rotary gear extending radially from the other side of the hub, a touch gear for operating the governing member, and a side of the wire drum; And a braking member provided with a braking groove into which a tip portion of the braking plate is inserted.

In addition, according to the lifting device equipped with the safety device of the present invention, the governing member is installed through the bearing attached to the bracket attached to the upper side of the frame, the fixed shaft fixed to the bracket and the touch gear is engaged with the swinging Or a governing gear that is rotated, and a counterweight formed integrally with the governing gear so that the governing gear is oscillated and the rotation is limited by the locking bar.

In addition, according to the elevating device provided with the safety device of the present invention, it is provided on one side of the bracket further comprises a manual braking solenoid device for limiting the rotation of the touch gear irrespective of the rotation of the governor. do.

In addition, according to the elevating device equipped with the safety device of the present invention, the governing gear is provided with a cutout of a predetermined width without gear teeth, is installed on the frame and the balance gear is rotated so that the governing gear and the touch gear are not engaged. It characterized in that it further comprises a speed limit solenoid device.

In addition, according to the lifting device equipped with the safety device of the present invention, the forward and reverse limit switches are installed on both sides of the governing gear of the governing member, and detecting the balance weight to generate a stop signal for the drive motor, and the wire It is characterized in that it further comprises a cam limit switch box is connected to the rotary shaft of the drum is rotated and the wire drum is not rotated or cut off the power supplied to the drive motor according to the signal of the limit switch.

Hereinafter, with reference to the accompanying drawings illustrating a lifting device equipped with a safety device according to the present invention.

1 is a block diagram showing a lifting device equipped with a safety device according to the present invention, Figure 2 is a side view of a lifting device equipped with a safety device of the present invention, Figure 3 is a cross-sectional view of the safety device of the main component of the present invention. 4 is a reference diagram showing a braking form in a safety device that is a main component of the present invention. In addition, Figure 5 is a block diagram showing the speed governing portion of the safety device that is the main component of the present invention, Figure 6 is a view showing the structure of the governing portion during automatic braking, Figure 7 is a view showing the structure of the speeding portion during manual braking 8 is a view showing the shape of the speed governing portion when the speed limit.

Lifting device equipped with a safety device according to the present invention, by reducing the rotational force of the wire drum 10 and the drive motor 11 installed in the frame 15 by lifting or unwinding the wire connected to the stage device to lift the stage device A reducer 12 for transmitting to the wire drum 10, a lift limiting member 20 provided on the side of the wire drum 10 to limit rotation of the wire drum 10 in an emergency, and the frame 15. The speed limit member (30) installed in the operation and linked with the lift limiting member, and installed on one side of the speed control member 30 to limit the operation of the speed control member 30 to increase the lift limiting member (20) By operating the locking bar 40 to prevent the wire drum 10 from rotating, the motor brake 14 for stopping the operation of the driving motor 11 and the brake release lever 14 'for releasing it. Include.

Here, the wire drum 10 and the wire is used to elevate the stage device, but if the rotary member rotated by the drive motor 11 and the connecting member wound on the rotary member and connected to the stage device once You can use either.

In addition, the lifting limiting member 20 is a bushing 21 coupled to the rotational shaft of the wire drum 10 and having a screw formed on an outer circumferential surface thereof, and a hub 22 screwed to the bushing 21 to be moved in the axial direction. And a braking plate 23 extending radially from one side of the hub 22 and a rotating plate 24 extending radially from the other side of the hub 22 at regular intervals. ) And a braking member 26 provided with a touch gear 25 for activating the brake gear and a brake groove provided at the side of the wire drum 10 and into which the tip portion of the brake plate 23 is inserted. At this time, it is preferable that the slip pad 27 is installed in the braking groove of the braking member 26.

In addition, the governing member 30 is installed via the bracket 35 attached to the upper side of the frame 15 and the bearing 34 on the fixed shaft 33 fixed to the bracket 35 and the touch The gear 25 is engaged and oscillated or rotated, and the governing gear 31 is integrally formed with the governing gear 31 so that the governing gear 31 is oscillated and rotation is restricted by the locking bar 40. And a counterweight 32.

And, the lifting device with a safety device of the present invention is installed on one side of the bracket 35, the manual braking solenoid device 43 for limiting the rotation of the touch gear 25 irrespective of the governing member 30 And a speed limiting solenoid device 44 installed on the frame 15 to pivot the balance weight 32 such that the speed gear 31 and the touch gear 25 do not engage. For this purpose, the governing gear 31 should be provided with a cutout 31 'having a predetermined width without gear teeth.

In addition, the elevating device with a safety device of the present invention is installed on each side of the governing gear 31 of the governing member 30 and detects the balance weight 32 to generate a stop signal for the drive motor 11 The forward and reverse limit switches 41 and 42 and the rotary shaft 13 of the wire drum 10 are connected by chains and rotated, and the wire drum 10 is not rotated or the limit switches 41 and 42 are rotated. It further comprises a cam limit switch box 45 to cut off the power supplied to the drive motor 11 in accordance with the signal of the.

The lifting device equipped with the safety device of the present invention configured as described above prevents the fall of the stage device by controlling the rotational speed of the wire drum when the stage device is elevated.

As the driving motor 11 is operated, the wire drum 10 is rotated, and the stage device (not shown) is lifted while the wire is unwound or wound as the wire drum 10 rotates. At this time, the lift limiting member 20 located on the side of the wire drum 10 is rotated integrally with the wire drum 10, the touch gear 25 of the lift limiting member 20 is a fastening member ( 30 is intermittently engaged with the governing gear 31 to rotate the governing gear 31.

This is because the touch gear 25 is installed on the rotating plate 24 at regular intervals, and the governing gear 31 returns to its initial position immediately after rotation by the action of the counterweight 32. Therefore, the governing gear 3 has a rocking motion of repeating forward and reverse rotation while the wire drum 10 is rotated.

However, if the stage device falls momentarily, the rotational speed of the wire drum 10 is increased, and at the same time, the rotational speed of the lifting limiting member 20 is also increased. Therefore, the governing gear 31 rotated by the touch gear 25 of the lift limiting member 20 instantly rotates beyond the allowable range due to the inertia of the counterweight 32, and the counterweight 32 is locked. In contact with the bar 40 is stopped. Accordingly, the governing gear 31 is also stopped, and since the counterweight 32 is sensed by the limit switches 41 and 42, the limit switch box 45 stops the driving motor 11.

When the governing gear 31 is stopped, the touch gear 25 of the lift limiting member 20 meshed with the governing gear 31 is engaged with the governing gear 31, and the rotating plate on which the touch gear 31 is installed. The 24 and the hub 22 also do not rotate. At this time, since the wire drum 10 is rotated according to the fall of the stage device, the hub 22 screwed to the bushing 21 coupled to the rotating shaft 13 of the wire drum 10 moves along the axial direction. Done. Therefore, the braking plate 23 extending radially from the hub 22 is in close contact with the slip pad 27 in the braking groove of the braking member 26 provided on the side of the wire drum 10. As a result, friction force is generated between the brake plate 23 and the slip pad 27, and rotation of the wire drum 10 is blocked by the friction force. Therefore, since the wire is not released from the wire drum 10, the fall of the stage apparatus is prevented.

At this time, since the brake plate 23 compresses the slip pads 27 to generate frictional force, the wire drum 10 is not suddenly stopped but gradually decreases in speed and stops. Accordingly, the safety of the stage device is improved by reducing the amount of impact that may occur due to the sudden stop during the fall so that the wire is not broken.

Of course, apart from the operation of the governing member 30, the user may directly limit the rotation of the wire drum 10. That is, when the user operates the solenoid device 43 for manual braking by operating a separate emergency switch or the like when the stage device falls, the protrusions of the solenoid device 43 are placed in the space between the touch gear 25. The rotation of the wire drum 10 may be blocked by being inserted to block the rotation of the touch gear 25. In this case, too, the hub 22 moves along the axial direction, and the rotation of the wire drum 10 is blocked by the friction between the brake plate 23 and the slip pad 27.

In addition, when it is necessary to limit the operation of the speed governing member 30, the speed limiting solenoid device 44 is operated to rotate the counterweight 32 by a certain amount, thereby cutting off the speed gear 31. 31 'may be exposed to the touch gear 25 of the lift limiting member 20. In this case, since the touch gear 25 is rotated without being engaged with the governing gear 31, the wire drum 10 is rotated irrespective of the governing member 20, so that the stage apparatus can be quickly elevated.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those of ordinary skill in the art are appropriately within the scope described in the claims of the present invention. Changes will be possible.

As described above, according to the elevating device having a stabilizer according to the present invention, the fall of the stage device can be prevented by using a safety device having a relatively simple configuration, thereby reducing the manufacturing cost and preventing sudden braking during the fall. There is an effect to improve.

In addition, according to the elevating device with a safety device according to the present invention, the structure of the elevating limiting member and the governing member for controlling the rotational speed of the wire drum is simple, there is another effect that is easy to manufacture and maintain.

In addition, according to the lifting device provided with the safety device of the present invention, the user can directly block the rotation of the wire drum has the effect of reducing the risk of a safety accident.

Claims (7)

A wire drum 10 for elevating the stage device by winding or unwinding the wires connected to the stage device, and a reducer 12 for reducing the rotational force of the driving motor 11 installed in the frame 15 to the wire drum 10. In the lifting apparatus including), Lifting member 20 is provided on the side of the wire drum 10 to limit the rotation of the wire drum 10 in the emergency, and the governing member is installed in the frame 15 and operates in conjunction with the lift limiting member 30 and a locking bar installed on one side of the governing member 30 to restrict the operation of the governing member 30 to operate the lifting limiting member 20 so that the wire drum 10 does not rotate. Elevator device with a safety device, characterized in that it comprises a (40). The method of claim 1, The lifting limiting member 20 includes a bushing 21 coupled to a rotating shaft of the wire drum 10 and having a screw formed on an outer circumferential surface thereof, and a hub 22 screwed to the bushing 21 and moved in an axial direction. The brake plate 23 extends radially from one side of the hub 22 and the rotation plate 24 extending radially from the other side of the hub 22 at regular intervals, so that the governing member 30 is disposed. And a braking member 26 provided with a touch gear 25 for operating the brake gear and a braking groove provided at the side of the wire drum 10 and into which the tip portion of the braking plate 23 is inserted. Platforms with safety devices. The method of claim 2, Lift device with a safety device, characterized in that the slip pad 27 is installed in the braking groove of the braking member (26). The method according to claim 1 or 2, The governing member 30 is provided with a bracket 35 attached to an upper side of the frame 15 and a bearing 34 on a fixed shaft 33 fixed to the bracket 35 and the touch gear. (25) is engaged with the governing gear 31 is rocking or rotating, and formed integrally with the governing gear 31 so that the governing gear 31 is oscillated and the rotation is limited by the locking bar (40) Lifting device with a safety device, characterized in that it comprises a counterweight (32). The method of claim 4, wherein The safety device is provided on one side of the bracket 35 further comprises a manual braking solenoid device 43 for limiting the rotation of the touch gear 25 irrespective of the governing member 30. Hoisting device. The method of claim 4, wherein The governing gear 31 has a cutout portion 31 'having a predetermined width without gear teeth, And a speed limiting solenoid device 44 installed on the frame 15 to rotate the balance weight 32 so that the speed governing gear 31 and the touch gear 25 do not engage. Elevating device with safety device. The method of claim 4, wherein And forward and reverse limit switches 41 and 42 respectively installed on both sides of the governing gear 31 of the governing member 30 and detecting the balance weight 32 to generate a stop signal for the driving motor 11. And is connected to the rotating shaft 13 of the wire drum 10 by a chain and rotated, and the wire drum 10 is not rotated or is supplied to the driving motor 11 according to the signals of the limit switches 41 and 42. Lifting device with a safety device, characterized in that it further comprises a cam limit switch box (45) to cut off the power supply.

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