JPH0362636B2 - - 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 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 the hoisting and lowering speeds are increased during ascending and descending transportation in order to improve the efficiency of ascending and descending transportation.

[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, and a low-speed operation grip 7 and a load hanger 5 are connected to the outer periphery of the holding cylinder 3, respectively, and are held at a neutral position in the vertical direction by a neutral position holding spring 6. Grips 8 for high-speed operation are fitted in the holding cylinder 3 so as to be able to rise and fall at intervals in the vertical direction, and a switch for low-speed hoisting is operated by the upward movement of a striker 9 fixed to the grip 7 for low-speed operation. A low speed lowering switch S-LD which is operated by the downward movement of S-LU and its striker 9, and a high speed hoisting switch S-HU which is operated by the upward movement of the striker 10 fixed to the high speed operation grip 8. and a high-speed hoisting switch S-HD which is operated by the downward movement of the striker 10.

〔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 11 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 12 is connected by a bolt 13 to the hanging end of the load lifting strip 2 consisting of a load chain hanging from the load sheave of the cable support member 12. The upper end of the holding tube 3 is screwed onto the male threaded shaft 14, and the holding tube 3 and the cable support member 12 constitute a support member 4.

A load hanger 5 consisting of a hook is screwed to the lower end of the holding tube 3, and a number of anti-slip annular protrusions are provided on the lower part of the outer surface of the holding tube 3 at intervals in the vertical direction. A cylindrical rubber grip 7 for low-speed operation equipped with a strip is fitted so as to be able to move up and down, and a large number of anti-slip rings are provided on the upper part of the outer surface of the holding tube 3 at intervals in the vertical direction. A cylindrical rubber grip 8 for high-speed operation equipped with protrusions is fitted so as to be movable up and down, and spring holding shafts 15 are fitted into the lower and upper parts of the holding cylinder 3, respectively, and fixed with screws 16. The annular portions of the springs 6 for maintaining the neutral position are fitted onto the respective spring holding shafts 15, and the annular portions of the springs 6 for maintaining the neutral position are respectively fitted on the upper and lower parts of the spring receiving protrusions 17 provided integrally on the inner surface of each grip 7, 8. Both arms of the spring 6 are engaged, and a pair of vertically extending slits 18 are provided at the upper and lower parts of the holding cylinder 3, respectively, to allow vertical movement of each arm of the spring 6.
8 are each independently held in a neutral position by each of the springs 6.

A striker 9 is fixed to the inner surface of the grip 7 for low-speed operation with screws 19, and a striker 10 is fixed to the inner surface of the grip 8 for high-speed operation with screws 20, and the striker 9 can be moved up and down in the holding cylinder 3. Guide slit 2 fitted with
1, and a guide slit 22 into which the striker 10 is fitted so as to be movable up and down.

A low-speed hoisting switch S- operated by upward movement of the striker 9 of the low-speed operation grip 7
A low-speed hoisting switch S-LD operated by the downward movement of the LU and its striker 9, and a high-speed hoisting switch S-HU and its striker 10 operated by the upward movement of the striker 10 of the high-speed operation grip 8. The high-speed lowering switch S-HD is operated by the downward movement of the holding cylinder 3.
The switch holding member 23 is fixed to the holding cylinder 3 with screws 24, and each of the switches S-LU, S-LD, S-HU, S-HD is The cable 2 is connected to the power control section of the electric hoisting device via a telescopic spiral cable 25.
The strip 2 for lifting and lowering a suspended load is inserted through the spiral portion 5. Furthermore, the characters ``LOW SPEED'' are displayed on the grip 7 for low-speed operation, and the characters ``HIGH SPEED'' are displayed on the grip 8 for high-speed operation.

When a DC motor is used as the electric motor in the electric hoist main body 1, the low speed hoisting switch S-LU or the low speed lowering switch S-LD is activated by moving up and down the low speed operation grip 7 having the striker 9. or striker 1
By operating the high-speed hoisting switch S-HU or the high-speed hoisting switch S-HD by moving up and down the high-speed operation grip 8 having 0, the resistance value of the power supply is changed and the power supply voltage is converted, Converts hoisting and hoisting speeds. In addition, when using AC parent-child motors with different rotational speeds as the electric motors in the electric hoist main body 1, the low-speed hoisting switch can be activated by moving up and down the low-speed operation grip 7 having the striker 9, as described above. The high-speed hoisting switch S-LU is activated by operating the low-speed hoisting switch S-LD, or by moving up and down the high-speed operation grip 8 having the striker 10.
By operating the HU or the high-speed hoisting switch S-HD, the alternating current parent-child motor is switched and the hoisting and hoisting speeds are changed.

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 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 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 recess 26 is provided in the upper part of the grip 7 for low-speed operation, and a downward protrusion that fits into the recess 26 is provided in the lower part of the grip 8 for high-speed operation. Although the section 27 is provided in series, the other configuration is the same as that of the first embodiment.

In the case of the second embodiment, the upper part of the grip 7 for low-speed operation and the protrusion 27 of the grip 8 for high-speed operation overlap in the lateral direction, so that the overall length of the grips 7, 8 can be shortened.

When carrying out this invention, the grip 7 for low-speed operation is placed on the upper side, and the grip 8 for high-speed operation is placed on the upper side.
may be placed at the bottom. In addition, the luggage hanging device 5
However, any hanging hardware may be used in place of the hook.

The wheels of a trolley equipped with a traveling drive device may be placed on the lower flange of a traveling rail installed on the ceiling, and the upper part of the electric hoist main body 1 may be connected to the lower part of the trolley frame. Further, 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, the grip 7 for low speed operation is simply
By holding it with one hand and moving it upward or downward from the neutral position, the striker 9 provided on the grip 7 for low-speed operation activates the low-speed hoisting switch S-LU or the low-speed hoisting switch S-LU.
By operating the LD, the electric hoisting device can be operated in low-speed hoisting or low-speed hoisting operation, and by simply grasping the high-speed operation grip 8 with one hand and moving it upward or downward from the neutral position, A striker 10 provided on the grip 8 for high-speed operation
By operating the high-speed hoisting switch S-HU or the high-speed hoisting switch S-HD, the electric hoisting device can be operated at high-speed hoisting or high-speed hoisting operation. The hoisting device can be selectively operated between low-speed hoisting operation, low-speed hoisting operation, high-speed hoisting operation, and high-speed hoisting operation, and is provided with an independent grip 7 for low-speed operation and grip 8 for high-speed operation. This makes it possible to clearly distinguish between low-speed driving operations and high-speed driving operations, thereby reducing the risk of erroneous operation during low-speed driving and high-speed driving. Since it is only necessary to move, even when no load is applied to the load hanging device 5, hoisting and lowering operations can be performed without tilting the load hanging device 5. In addition, it is possible to make the shock smaller by lowering the lifting speed at the start and end of lifting and lowering transportation, and it is also possible to increase the lifting speed during lifting and lowering transportation to improve lifting and lowering transportation efficiency.

[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 a cross-sectional plan view showing the striker and switch mounting portion, FIG. 4 is a cross-sectional plan view showing the grip neutral position holding portion, and FIG. 5 is a front view of the electric hoisting device having a two-speed operating device. It is. FIG. 6 is a front view of an electric hoisting device having a two-speed operation operating 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 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, and 7 is for low speed operation Grip, 8 is a grip for high-speed operation, 9 and 10 are strikers, 11 is an upper hook for hanging, 1
2 is a cable support member, 15 is a spring holding shaft, 17
21 and 22 are guide slits, 23 is a switch holding member, 25 is a cable,
26 is a recess, 27 is a protrusion, S-LU is a low speed hoisting switch, S-LD is a low speed hoisting switch, S
-HU is a switch for high-speed hoisting, and S-HD is a switch for high-speed hoisting.

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 low-speed operation grip 7 and a high-speed operation grip 8, which are each held at a neutral position in the vertical direction by a neutral position holding spring 6, are fitted to the outer periphery of the holding cylinder 3 at intervals in the vertical direction so as to be able to move up and down. Inside the holding cylinder 3 are a low-speed hoisting switch S-LU that is operated by the upward movement of a striker 9 fixed to the low-speed operation grip 7, and a low-speed hoisting switch S-LU that is operated by the downward movement of the striker 9. -LD, a high-speed hoisting switch S-HU that is operated by the upward movement of the striker 10 fixed to the high-speed operation grip 8, and a high-speed hoisting switch S-HD that is operated by the downward movement of the striker 10. A two-speed operation control device for an electric hoisting device, characterized in that it is provided with a.