JPH0411480B2 - - 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, as a two-speed operation control device for an electric hoisting device, as shown in Japanese Patent Application No. 62-33515 (Japanese Unexamined Patent Publication No. 63-202593), a two-speed operation control device for an electric hoisting device has been used, which is suspended from the main body of the electric hoisting device. At the hanging end of the suspended load lifting strip,
The upper part of a support member comprising a switch box and a vertical holding cylinder connected to the lower part of the support member is connected, and a load hanging device is connected to the lower part of the holding cylinder,
And on the outer periphery of the holding cylinder, there is a spring 7 for holding the neutral position.
A grip held at a neutral position in the vertical direction is fitted so as to be able to move up and down, and a hoisting switch is provided in the holding cylinder, which is operated by the upward movement of a striker fixed to the grip, and a hoisting switch which is operated by the downward movement of the striker fixed to the grip. A structure has been proposed in which a lowering switch to be operated is attached, and a high/low speed changeover switch is attached to the switch box.

[Problem that the invention seeks to solve]

However, in the case of the conventionally proposed two-speed operating device for electric hoisting equipment, a switch for switching between high and low speeds is attached to a support member, and a grip is fitted into the support member so as to be able to move up and down. If you grip the grip and operate the high/low speed switch while moving up and down, the distance between the grip part of the grip and the high/low speed switch changes, which makes the high/low speed switch difficult to operate. There's a problem.

[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. A vertical holding cylinder 3 is attached to the hanging end of the hanging load lifting strip 2 hanging from the
A load hanger 5 is connected to the load hanger 5 via a support member 4 having a handle 4, and a grip 7, which is held at a neutral position in the vertical direction by a neutral position holding spring 6, is fitted onto the outer periphery of the holding cylinder 3 so as to be able to rise and fall freely. and the holding cylinder 3
a hoisting switch SU operated by the upward movement of a striker 8 fixed to the grip 7;
A two-speed operation operation for an electric hoisting device, characterized in that a lowering switch SD operated by the downward movement of the striker 8 is attached, and a high/low speed switching switch S is attached to the grip 7. It's in the device.

〔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 9 for hanging is connected to the upper part of an electric hoist main body 1 consisting of an electric chain block main body, and The upper part of the cable support member 10 is connected by a bolt 11 to the hanging end of the load lifting strip 2 consisting 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 10 The upper end of the holding tube 3 is screwed onto a male threaded shaft 12 provided at the center, and the holding tube 3 and the cable support member 10 constitute a support member 4.

A load hanging device 5 consisting of a hook is screwed to the lower end of the holding tube 3, and the outer surface of the holding tube 3 is provided with a large number of anti-slip annular protrusions provided at intervals in the vertical direction. A rubber cylindrical grip 7 equipped with a rubber grip 7 is fitted so as to be able to move up and down, and a spring holding shaft 13 is fitted into the lower part of the holding cylinder 3 and fixed with a screw 14, and the middle part is fitted into the spring holding shaft 13. Both arms of the provided neutral position holding spring 6 are engaged with the upper and lower parts of a spring receiving protrusion 15 that is integrally provided on the inner surface of the grip 7, and each arm of the spring 6 is attached to the holding tube 3. A pair of vertically extending slits 16 are provided to allow vertical movement of the grip 7, respectively, and the grip 7 is held at a neutral position in the vertical direction by the spring 6.

A striker 8 is fixed to the upper part of the inner surface of the grip 7 with a screw 17, and a guide slit 1 is provided in the middle of the holding cylinder 3 and extends in the vertical direction.
A striker 8 is provided in the slit 18.
a hoisting switch SU into which is slidably inserted and further operated by upward movement of the striker 8;
The lowering switch SD, which is operated by the downward movement of the striker 8, is fixed to a switch holding member 19 in the holding cylinder 3 with screws, and the switch holding member 19 is fixed to the holding cylinder 3 with screws 20. There is.

A slit 21 extending in the vertical direction is provided in the upper part of the holding cylinder 3, and a high/low speed changeover switch S consisting of a push button switch is inserted into the slit 21 so as to be able to move up and down. It is fixed to
The SD is connected to the power supply control section of the electric hoisting device via an extensible spiral 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 resistance value of the power supply is changed by pressing the high/low speed changeover switch S to convert the power supply voltage, thereby controlling hoisting and lowering. Convert speed. 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 pressing the high/low speed switching switch S.

When switching the speed of hoisting operation and lowering operation, when the grip 7 is raised and the hoisting switch SU is operated by the striker 8, low-speed hoisting operation is performed, and when the grip 7 is lowered and the striker 8 is operated, the hoisting operation is performed at a 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 the operation is switched to the low-speed hoisting operation or the low-speed hoisting operation again when the finger is released from the high-speed changeover switch S.

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 movement of the load hanging device 5 when there is no load, and during lifting and lowering transportation, etc. It is capable of high-speed operation, and low-speed operation is possible at the start of lifting a load, at the end of the lifting movement of the load, when seating the load to be lowered, and when lowering the load to a predetermined position. If the suspended load is deviated laterally, the load can be easily lowered to a predetermined position by lowering the load at low speed while pressing the grip 7 laterally.

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 upper part of the grip 7. Although it is wrapped around and fixed with adhesive,
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 7.

When carrying out this invention, any hanging fitting may be used instead of the hook as the luggage hanging device 5, and the wheels of a trolley equipped with a traveling drive device may be used as the luggage hanging device 5. 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. 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 7 with one hand and moving it upward from the neutral position, the hoisting switch SU is operated by the striker 8 provided on the grip 7, and the electric hoisting device is activated. By simply holding the grip 7 with one hand and moving it downward from the neutral position, the hoisting operation can be started by operating the hoisting switch SD using the striker 8 and starting the hoisting operation of the electric hoisting device. Downward operation can be started and therefore grip 7
The electric hoisting device can be easily hoisted and hoisted by simply holding it with one hand and moving it upward or downward, and the load on the load hanging device 5 can be easily carried out. Even in the non-operating state, hoisting and hoisting operations can be performed without tilting the load hanging device 5, 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. The lifting speed can be increased during the process to improve lifting and lowering transportation efficiency.
Moreover, especially in the case of this invention, since the high/low speed switching switch S is attached to the grip 7,
Even if you operate the high/low speed switch while gripping the grip 7 and moving up or down, the distance between the grip part of the grip and the high/low speed switch remains constant and does not change. Effects such as improved operability 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 holding cylinder, 4 is a support member, 5 is a load hanging device, 6 is a spring for maintaining a neutral position, 7 is a grip, 8 is a striker, 9 is an upper hook for hanging, 10 is
13 is a cable support member, 13 is a spring holding shaft, 15 is a spring receiving projection, 18 is a guide slit, 19 is a switch holding member, and 22 is a cable.

Claims (1)

[Claims] 1 A load hanging tool 5 is connected to the hanging end of the load lifting strip 2 hanging from the electric hoist main body 1 via a support member 4 equipped with a vertical holding cylinder 3. A grip 7, which is held at a neutral position in the vertical direction by a neutral position holding spring 6, is fitted onto the outer periphery of the holding cylinder 3 so as to be able to move up and down.
A hoisting switch SU, which is operated by the upward movement of a striker 8 fixed to the grip 7, and a hoisting switch SD, which is operated by the downward movement of the striker 8, are attached to the grip 7. A two-speed operation operating device for an electric hoisting device, characterized in that a switch S is attached.