JPS63202593A - Two-step speed operation driving device for electric winder - 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] [Industrial Application Field] The present invention is capable of hoisting and lowering an electric hoisting device such as an electric chain hoist or an electric hoist at two speeds, low speed and high speed. This invention relates to a two-speed operation control device.

[Prior art]

Conventionally, as an operating device for an electric hoisting device, the
As announced by Publication No. 1-152569,
A load hanging device is connected to the hanging end of the load lifting strip hanging from the electric hoisting device body via the switch box body, and a grip protruding laterally from the switch box body. There is known an earth structure operating device that has a pusher button for a hoisting switch and a pusher button for a lowering switch.

[Problem that the invention seeks to solve]

However, in the case of the conventional operation control device for an electric hoisting device, the switch push button is provided on a grip that protrudes laterally from the switch box body, so the push button is operated by grasping the grip. When the load hanger is tilted, a vertical force is applied to the grip, which may cause the switch box body and the load hanger to tilt. It becomes difficult. In addition, in the case of the conventional operation control device, the hoisting speed and lowering speed cannot be changed, so at the start and end of lifting and lowering, the hoisting speed and lowering speed of hoisting and hoisting are set to low speeds in order to reduce the shock. In order to improve the efficiency of lifting and lowering, it is not possible to carry out a speed switching operation in which the hoisting and lowering speeds of the hoisting and lowering parts during lifting and lowering are increased.

[Purpose and structure of the invention]

The entire purpose of this invention is to provide a two-speed operation operating device for an electric hoisting device that can advantageously solve the above-mentioned problems. The upper part of a support member 5, which includes a switch box 5 and a vertical holding cylinder 4 connected to the lower part of the switch box 5, is connected to the hanging end of the strip 2 for lifting and lowering a suspended load, which hangs down from the switch box 5.
A load hanger 6 is connected to the lower part of the holding tube 4, and a grip 8, which is held at a neutral position in the vertical direction of ρ by a neutral position holding spring 7, is fitted onto the outer periphery of the holding tube 4 so as to be able to rise and fall. A hoisting switch SU fixed to the grip 8 and operated by the upward movement of the striker 9, and a hoisting down switch SD operated by the downward movement of the striker 9. The two-speed operating device for an electric hoisting device is characterized in that a switch S for switching between high and low speeds is attached to the switch box.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 5 show a first embodiment of the present invention, in which an upper hook 10 for hanging is connected to the upper part of an electric hoisting device main body 1 consisting of an electric chain hoist main body, and The upper part of the cable support member 11 is connected by a bolt 12 to the hanging end of the load lifting strip 2 made of a load chain hanging from the load sheave of the hoisting device main body 1, and the lower part of the cable support member 11 The upper part of the switch box 5 is screwed and connected to the male threaded shaft 15 provided in the center, and the upper end of the vertical holding cylinder 4 with a circular cross section is fixed by welding to the lower part of the switch box filter. A support member 5 is constituted by the cable support member 11, the switch box 3, and the holding tube 4.

A load hanging device 6 consisting of a hook is provided at the lower end of the holding tube 4.
A rubber cylindrical grip 8 is fitted onto the outer surface of the holding cylinder 4 so as to be able to rise and fall freely and has a number of anti-slip annular protrusions provided at intervals in the vertical direction. is,
Further, a spring holding shaft 14 is fitted into the lower part of the holding cylinder 4 and fixed with a screw 15, and both arms of the neutral position holding spring 7 fitted into the middle part or the spring holding shaft 14 are attached to the inner surface of the grip 8. The holding cylinder 4 is provided with a pair of vertically extending slits 17 which are engaged with the upper and lower parts of a spring receiving protrusion 16 that is integrally provided with the spring 7, and which allow the arms of the spring 7 to move up and down, respectively. Grip 8 by spring 7
is held in a neutral position in the vertical direction.

A striker 9 is attached to the upper part of the inner surface of the grip 8 with a screw 18.
A guide slit 19 is provided in the upper part of the holding cylinder 4 and extends in the vertical direction, and a striker 9 is slidably inserted into the slit 19, and is further operated by upward movement of the striker 9. The hoisting switch SU, which is operated by the downward movement of the striker 9, and the hoisting switch SD, which is operated by the downward movement of the striker 9, are fixed to a switch holding member 20 within the holding cylinder 4 with screws, and the switch holding member 20 is fixed to the holding cylinder. 4 with screws 21.

A high/low speed changeover switch S consisting of a button switch is fixed to the front plate of the switch box 3, and the high/low speed changeover switch S, the hoisting switch SU, and the hoisting/lowering switch SD are arranged in a telescopic spiral shape. The entire cable 22 is connected to the power control unit of the electric hoisting device, and the cable 2
The above-mentioned strip 2 for lifting and lowering a suspended load is inserted into the spiral portion of 2.

When a DC motor is used as the motor in the electric hoisting device body 1, the hoisting and hoisting speeds are converted by changing the resistance value of the power source and converting the power supply voltage by operating the high/low speed switching switch S. do. Further, when using AC parent-child motors with different rotational speeds as the electric motors in the electric hoist main body 1, switching operation of the motors is performed by operating the high-low speed switching switch S.

When changing the speed of hoisting operation and hoisting operation, raise the grip 8 and press the hoisting switch SU with the striker 9.
When operated, low-speed hoisting operation is performed, and the grip 8 is lowered and the lowering switch 5DK is activated by the striker 9.
- When operated, low-speed lowering operation is performed, and when the high-low speed changeover switch Se is pressed while performing low-speed hoisting operation or low-speed lowering operation, it is switched to high-speed lowering operation or high-speed lowering operation, It may be configured such that when the high-low speed changeover switch S is released, the low-speed hoisting operation or the low-speed hoisting operation is switched again to the low-speed hoisting operation.

It is configured so that the hoisting speed and lowering speed are changed each time the high-low speed changeover switch S is pressed, and the high-low speed changeover switch S has a high-speed indicator lamp that lights up when switched to high-speed operation. Then, by moving the grip 7 up or down, the hoisting switch SU or lowering operates the hoisting switch SD to perform hoisting or lowering operation, and at the same time, presses the high/low speed changeover switch S to start the hoisting operation. The speed may be changed. If the vehicle is in high-speed operation, this can be confirmed by lighting the high-speed indicator lamp.

In the case of an electric hoisting device that is fully equipped with a two-speed operation control device configured as described above, during lifting and lowering transportation of empty boxes, lifting and lowering the load hanging device 6 when there is no load, and during lifting and lowering transportation, etc. It is capable of high-speed operation, and can be used at the start of lifting cargo and at the end of lifting the cargo.

It is possible to perform low-speed operation when seating the load to be lowered, and when lowering the suspended object to a predetermined position.
If the suspended load is deviated laterally, the load can be easily lowered to a predetermined position by pushing down the grip 8 while pressing it laterally to perform low-speed lowering operation. .

FIG. 6 shows a second embodiment of the present invention, in which a high-low speed changeover switch S consisting of a cord switch is used as a tape switch.
is wrapped around the entire circumference of the switch ZEX 6 and fixed with adhesive, but the other configurations are the same as in the first embodiment.

In the case of the second embodiment, the high/low speed changeover switch S can be operated from any direction around the grip 8.

When carrying out this invention, any hanging hardware may be used as the luggage hanging device 6 instead of the hook, and the wheels of a trolley equipped with a traveling drive device are mounted on the ceiling and the baggage hanging device 6 is mounted on the ceiling. It may be placed on the lower flange of the trolley rail, and the upper part of the electric hoist main body 1 may be connected to the lower part of the trolley frame. Further, as the high/low speed switching switch S, a snap switch may be used instead of the push button switch.

Furthermore, the present invention can be implemented in a two-speed operating device for an electric hoist having a wire rope lifting drum.

〔Effect of the invention〕

According to this invention, by simply holding the grip 8 with one hand and moving it upward from the neutral position, the hoisting switch SU is operated by the striker 9 provided on the grip 8, and the electric hoisting device is hoisted. Operation can be started, and by simply holding the grip 8 with one hand and moving it downward from the neutral position, the lowering switch SD is operated by the striker 9, and the lowering operation of the electric hoisting device is started. Therefore, by simply holding the grip 8 with one hand and moving it upward or downward, the electric hoisting device can be easily hoisted and hoisted. And even if no load is applied to the luggage hanging device 6, the luggage hanging device 6
Hoisting operation and lowering operation can be performed without tilting, and by simply operating the high-low speed changeover switch S, high-speed hoisting operation 2 hoisting operation 2 or low-speed hoisting operation 8 It is possible to switch to lowering operation, so the lifting speed can be lowered at the start and end of lifting and lowering to reduce shock, and the lifting speed can be increased during lifting and lowering to improve lifting efficiency. Effects such as being able to do this can be obtained.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional side view showing a two-speed operation operating device for an electric hoisting device, and FIG. 2 is a front view thereof. , Figure 6 is the first
FIG. 4 is an enlarged sectional view taken along line AA in FIG. 1, FIG. 5 is an enlarged sectional view taken along line BB in FIG. 1, and FIG. FIG. 6 is a longitudinal sectional side view showing a two-speed operation operating device for an electric hoisting device according to a second embodiment of the present invention. In the figure, 1 is the main body of the electric hoisting device, 2 is the strip for lifting and lowering the suspended load, 5 is the switch number, 4 is the holding cylinder, 5 is the support member, 6 is the load hanging device, and 7 is the spring for holding the neutral position. , 8 is a grip, 9 is a striker, 10 is an upper hook for hanging, 11 is a cable support member, 14 is a spring holding shaft, 19 is a guide slit, 20 is a switch holding member, 22 is a cable,
SU is a hoisting switch, SD is a hoisting switch, and S is a high/low speed changeover switch. ), 22

Claims (1)

[Claims] A strip 2 for lifting and lowering a suspended load hanging from the electric hoisting device main body 1
The upper part of a support member 5, which includes a switch box 5 and a vertical holding cylinder 4 connected to the lower part thereof, is connected to the hanging end of the support member 5, and a load hanging device 6 is connected to the lower part of the holding cylinder 4. and a neutral position holding spring 7 is provided on the outer periphery of the holding cylinder 4.
A grip 8 held at a neutral position in the vertical direction is fitted in the holding cylinder 4 so as to be able to move up and down, and a hoisting switch SU is provided in the holding cylinder 4, which is operated by upward movement of a striker 9 fixed to the grip 8; A two-speed operation for an electric hoisting device characterized in that a hoisting switch SD operated by the downward movement of the striker 9 is attached, and a high-low speed changeover switch S is attached to the switch box 6. Operating device.