JPH0362635B2 - - Google Patents

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 block 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, the operating device for electric hoisting equipment is
As disclosed in Japanese Unexamined Patent Publication No. 51-132569, a load hanging device is connected to the hanging end of the load lifting strip hanging from the electric hoisting device body via a switch box body. However, there is known an operating device having a structure in which a push button for a hoisting switch and a push button for a hoisting down switch are provided on a grip that projects laterally from the switch box body.

[Problem that the invention seeks to solve]

However, in the case of the above-mentioned 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 doing so, a vertical force may be applied to the grip, causing the switch box body and the load hanging device to tilt.
It becomes difficult to engage the luggage hanger with the luggage. In addition, in the case of the conventional driving operation device,
Since the hoisting and lowering speeds cannot be changed, the hoisting and lowering speeds are set to low speeds to reduce the shock at the start and end of lifting and lowering.
In addition, it is not possible to perform a speed switching operation in which hoisting and lowering speeds are increased during lifting and lowering in order to improve lifting and lowering transport efficiency.

[Purpose and structure of the invention]

The object of the present 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 3 and a vertical holding cylinder 4 connected to its lower part, is connected to the hanging end of the strip 2 for lifting and lowering a suspended load, which is suspended from A load hanger 6 is connected to the lower part of the cylinder 4, and a grip 8, which is held at a neutral position in the vertical direction by a neutral position holding spring 7, is fitted onto the outer periphery of the holding cylinder 4 so as to be able to move up and down. Inside the holding cylinder 4, a hoisting switch SU is operated by the upward movement of a striker 9 fixed to the grip 8, and a hoisting down switch is operated by the downward movement of the striker 9.
SD is attached to the switch box 3,
This is a two-speed operating device for an electric hoisting device, characterized in that a switch S for switching between high and low speeds is attached.

〔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 hoist main body 1 consisting of an electric chain block main body, and Hoisting device body 1
The upper part of the cable support member 11 is connected by a bolt 12 to the hanging end of the load elevating strip 2 consisting of a load chain hanging from the load sheave of The upper part of the switchbox 3 is threadedly connected to the male threaded shaft 13, and the upper end of a vertical holding cylinder 4 with a circular cross section is fixed to the lower part of the switchbox 3 by welding. and the holding cylinder 4 support the support member 5.
is configured.

A load hanging device 6 consisting of a hook is screwed to the lower end of the holding tube 4, and the outer surface of the holding tube 4 is provided with a large number of anti-slip annular protrusions provided at intervals in the vertical direction. A cylindrical grip 8 made of rubber is fitted so as to be movable up and down, and a spring holding shaft 14 is fitted into the lower part of the holding cylinder 4 and fixed with a screw 15, and the middle part is fitted into the spring holding shaft 14. Both arms of the provided neutral position holding spring 7 are engaged with the upper and lower parts of a spring receiving protrusion 16 that is integrally provided on the inner surface of the grip 8, and each arm of the spring 7 is attached to the holding cylinder 4. A pair of vertically extending slits 17 are provided to allow vertical movement of the grip 8, respectively, and the grip 8 is held at a neutral position in the vertical direction by the spring 7.

A striker 9 is fixed to the upper part of the inner surface of the grip 8 by a screw 18, and a guide slit 19 is provided at the upper part of the holding cylinder 4 to extend in the vertical direction.
A striker 9 is slidably inserted into the slit 19, and a hoisting switch SU is operated by the upward movement of the striker 9, and a hoisting switch SD is operated by the downward movement of the striker 9. is fixed to the 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 switching switch S consisting of a button switch is fixed to the front plate of the switch box 3, and the high/low speed switching switch S, the winding switch SU, and the winding down switch SD are arranged in a telescopic spiral shape. It is connected to the power supply control section of the electric hoisting device via a cable 22, and the suspended load lifting strip 2 is inserted through the spiral portion of the cable 22.

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

When switching the speed of hoisting operation and lowering operation, low-speed hoisting operation is performed when the grip 8 is raised and the hoisting switch SU is operated using the striker 9, and when the grip 8 is lowered and the hoisting switch SU is operated using the striker 9, the hoisting operation is performed at low speed. When lower switch SD is operated, low-speed lowering operation is performed, and when high-low speed changeover switch S is pressed while performing low-speed hoisting operation or low-speed lowering operation, high-speed hoisting operation or high-speed lowering operation is performed. It may be configured such that when the high-low speed switching switch S is released, the low-speed hoisting operation or the low-speed lowering operation is switched again.

In addition, the high-low speed changeover switch S is configured so that the hoisting speed and lowering speed are changed each time the high-low speed changeover switch S is pressed, and has a high-speed indicator lamp that lights up when the high-speed operation is switched.
and move the grip 7 up or down to turn the hoisting switch SU or the lowering switch.
The operating speed may be changed by operating the SD to perform the hoisting operation or the hoisting down operation, and by pressing the high/low speed changeover switch S. 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 equipped with a two-speed operating device configured as described above, during lifting and lowering transportation of empty boxes, lifting and lowering the load hanging device 6 when no load is applied, and during lifting and lowering transportation, etc. It is capable of high-speed operation, and low-speed operation is also possible at the start of lifting a load, at the end of the lifting movement of the load, and when seating the load to be lowered. 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 and performing low-speed lowering operation. I can do it.

FIG. 6 shows a second embodiment of the present invention, in which a high/low speed switching switch S consisting of a tape switch or a cord switch is used, and the high/low speed switching switch S is arranged around the entire circumference of the switch box 3. Although it is wrapped and fixed with an adhesive, 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 fitting may be used instead of the hook as the luggage hanging device 6, and the wheels of a trolley equipped with a traveling drive device may be used as the luggage hanging device 6. 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 grasping 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 activated. The hoisting operation can be started, and by simply holding the grip 8 with one hand and moving it downward from the neutral position, the hoisting switch SD can be operated by the striker 9 to start hoisting the electric hoisting device. Downward operation can be started and therefore grip 8
The electric hoisting device can be easily hoisted and hoisted by simply holding it with one hand and moving it up or down, and the load on the load hanging device 6 can be easily carried out. Even in the non-operating state, hoisting and lowering operations can be performed without the load hanging device 6 tilting, and by simply operating the high/low speed changeover switch S, It is possible to switch to high-speed hoisting and lowering operation or low-speed hoisting and lowering operation, which allows the lifting speed to be lowered at the start and end of lifting and lowering to reduce the size of the shock. Effects such as being able to increase the lifting speed in the middle of the process and improving the lifting and lowering conveyance efficiency can be obtained.

[Brief explanation of drawings]

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. , FIG. 3 is an enlarged sectional view taken along the line A-A in FIG. 1,
FIG. 4 is an enlarged sectional view taken along the line B--B in FIG. 1, and FIG. 5 is a front view of the electric hoisting device having a two-speed operating device. 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 electric hoist main body, 2 is a strip for lifting and lowering a suspended load, 3 is a switch box, 4 is a holding cylinder, 5 is a support member, 6 is a load hanging device, 7 is a spring for holding a neutral position, 8 is grip, 9 is 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 the hoisting switch, SD is the hoisting switch, S
is a switch for switching between high and low speeds.

Claims (1)

[Claims] 1. A support member 5 is provided with a switch box 3 and a vertical holding cylinder 4 connected to the lower part of the hanging load lifting strip 2 hanging from the electric hoist main body 1. The upper part is connected and its holding cylinder 4
A load hanger 6 is connected to the lower part of the holding cylinder 4, and a grip 8, which is held at a neutral position in the vertical direction by a neutral position holding spring 7, is fitted to the outer periphery of the holding cylinder 4 so as to be able to move up and down. A hoisting switch SU, which is operated by the upward movement of a striker 9 fixed to the grip 8, and a hoisting down switch SD, which is operated by the downward movement of the striker 9, are installed in the switch box 3. A two-speed operating device for an electric hoisting device, characterized in that a switch S for switching between high and low speeds is attached to the device.