JPH0362634B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] This invention relates to a low-speed hoisting switch, a high-speed hoisting switch, a low-speed hoisting switch, and a high-speed hoisting switch in an electric hoisting device such as an electric chain block or an electric hoist. This invention relates to a two-speed operation operating device that operates a lowering switch.

[Prior art]

Conventionally, as a speed conversion operation device for an electric hoisting device, as disclosed in Japanese Utility Model Application No. 48-35070, an opening in a box housing a mechanical/electrical conversion control device such as a potentiometer has been used. The middle part of the inner cover is pivoted by a pivot fixed to the inner cover, and the arc-shaped gear fixed to the pivot is connected to the machine.
A pinion fixed to the operating shaft of the electric conversion control device is engaged with the pinion, and both ends of the inner cover and the middle part of the box body are connected via a neutral position holding spring, and one end or the other end of the inner cover A speed converting operation device is known which is configured to rotate an operating shaft of a mechanical/electrical conversion control device through a pivot, an arcuate gear, and a pinion by pressing the inner cover.

[Problem that the invention seeks to solve]

However, in the case of the conventional speed conversion operation device, it is necessary to press one side or the other side of the inner cover while holding the box in hand, so it is difficult to perform speed conversion operation with one hand. The problem is that it is difficult.

[Purpose and structure of the invention]

The object of the present invention is to provide a two-speed operating device for an electric hoisting device that can advantageously solve the above-mentioned problems. A load hanging tool 5 is connected to the hanging end of the strip 2 for lifting and lowering a suspended load, via a support member 4 having a holding tube 3 extending in the vertical direction. Grip 7 held in neutral position by holding spring 6
are fitted in the support member 4 so as to be able to rise and fall freely, and a low-speed hoisting switch LS-LU and a high-speed hoisting switch LS-HU, which are sequentially operated via a striker by the upward movement of the grip 7, are installed in the support member 4, and the grip 7 A two-speed operation operation for an electric hoisting device, characterized in that a switch LS-LD for low-speed hoisting and a switch LS-HD for high-speed hoisting are sequentially operated via a striker by the downward movement of the electric hoisting device. It's in the device.

〔Example〕

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

1 to 9 show a first embodiment of the present invention, in which wheels 10 of a trolley 9 are equipped with a traveling drive device 8 consisting of an electric motor with a reduction gear.
is placed on the lower flange of the running rail 11,
An electric hoisting device main body 1 consisting of an electric chain block main body is connected to the lower part of a frame 12 of a trolley 9, and a suspended load lifting strip consisting of a load chain hanging from a load sheave of the electric hoisting device main body 1. At the hanging end of 2, there is a control device box 13.
The upper end is connected by a bolt 14, and the flange 15 at the upper end of the holding cylinder 3, which is perpendicular to the lower end of the control device box 13, is fixed by a bolt 16.
The holding cylinder 3 and the control device box 13 constitute a support member 4.

A cylindrical grip 7 having anti-slip irregularities on the outer periphery is slidably fitted on the outside of the middle part of the holding cylinder 3, and a grip 7 in the vertical direction is provided on both sides of the middle part of the holding cylinder 3 in the diametrical direction. A slit 17 extending in the direction of diameter is inserted through the operating rod 18 disposed in the holding cylinder 3, each slit 17, and the grip 7, and a pin 19 extending in the diametrical direction thereof is inserted. The part is locked to the grip 7.

A pressing ring 20 with an outer flange is fitted to the operating rod 18 on both upper and lower sides of the pin 19, and a supporting protrusion 21 is provided inside the central portion of the holding cylinder 3 in the height direction. Snap rings 23 that support the spring bearing rings 22 are fitted into annular grooves provided at the upper and lower parts of the spring bearing ring 3, and between each pressure ring 20 and each spring bearing ring 22, each is made of a helical spring. When the neutral position holding spring 6 is interposed in a compressed state and each pressing ring 20 is pressed by the neutral position holding spring 6 and pressed against the supporting protrusion 21, each pressing ring 20 pushes the pin 19 through the pin 19. The grip 7 and the operating rod 18 are held in a neutral position.

A pair of semicircular sleeves 25 each having a locking flange on the outer periphery of the upper end are fitted into a small diameter shaft portion 24 provided at the upper part of the luggage hanging device 5 consisting of a hook.
The pair of semicircular sleeves 25 are fitted into a support cylinder 27 that is provided with a locking groove 26 extending in the vertical direction and a male thread on the outside, and the support cylinder 2
7 is screwed into a female screw provided at the lower end of the holding cylinder 3, and a locking set screw 28 screwed into the lower end of the holding cylinder 3 is inserted into the locking groove 26.
A stopper 29 is inserted between the upper end surface of the load hanging tool 5 and the snap spring 23 to prevent the load hanging tool 5 from floating up.

A support frame 3 is provided within the control device box 13.
0 is fixed with a screw, and a drive shaft 31 extending laterally is rotatably supported by a support frame 30, and a thin metal strip-shaped drive member 32 is fitted onto and fixed to the drive shaft 31. A driving leaf spring 33 made of a spring is wound around the driving leaf spring 33, one end of which is fixed to the driving member 32, and the other end of the driving leaf spring 33 is connected to the upper end of the operating rod 18. It is fixed with screws 34.

A low speed hoisting switch is attached to the support frame 30.
The LS-LU and the low-speed lowering switch LS-LD are fixed by screws 35 in the overlapped state, and the high-speed lifting switch LS-HU and the high-speed lowering switch LS-HD are fixed by the screws 36 in the overlapped state. , and each switch is arranged so as to be lined up on a straight line parallel to the drive shaft 31;
1, a striker 38 for low-speed hoisting that operates the switch lever 37 of the low-speed hoisting switch LS-LU;
and a low-speed lowering striker 40 that operates the switch lever 39 of the low-speed lowering switch LS-LD;
Switch lever 4 of high-speed hoisting switch LS-HU
A high-speed hoisting striker 42 for operating the high-speed hoisting switch LS-HD and a high-speed hoisting striker 44 for operating the switch lever 43 of the high-speed hoisting switch LS-HD are fixed.

Each of the switches is connected to the power control section of the electric hoisting device via a cable 45, and the low-speed hoisting switch LS-LU is connected to the high-speed hoisting switch LS-HU.
The phase around the drive shaft of the switch lever operating section of the low-speed hoisting striker 38 and the switch operating section of the high-speed hoisting striker 42 is set so that the switch lever operating section of the low-speed hoisting striker 38 is operated before the low-speed hoisting switch LS.
-The switch lever operation part of the low-speed lowering striker 40 and the high-speed lowering striker 4 are arranged so that -LD is operated before the high-speed lowering switch LS-HD.
The phase around the drive shaft with the switch lever operating section of No. 4 is set. FIG. 7 shows the low-speed hoisting striker 38, the low-speed lowering striker 40, and the switch lever 37 of the low-speed hoisting switch LS-LU when the grip 7 and the operating rod 18 are in the neutral position.
FIG. 8 shows the relationship between the low-speed hoisting switch LS-LD and the switch lever 39, and FIG.
4 and the switch lever 41 of the high-speed hoisting switch LS-HU and the switch lever 43 of the high-speed hoisting switch LS-HD. Further, an operating rod 18 that is moved up and down by the grip 7 via a pin 19, and a drive shaft 31 that is rotated by the operating rod 18 via a driving plate spring 33 and a driving member 32, are interlocked for operating the striker. The mechanism is configured.

When a DC motor is used as the motor in the electric hoist main body 1, the hoisting and hoisting speeds are converted by changing the resistance value of the power source and converting the power supply voltage. When using AC parent-child motors with different rotational speeds as electric motors in the electric hoist main body 1, switching operation of the motors is performed by controlling a changeover switch.

In the two-speed operation operating device for an electric hoisting device according to the first embodiment, a worker grasps the grip 7 with one hand and moves the grip 7 upward against the elasticity of the upper neutral position holding spring 6. As the grip 7 moves up the operating rod 18 via the pin 19, the operating rod 18 rotates the driving member 32 in one direction via the driving leaf spring 33. Drive shaft 31 by drive member 32
Each striker is also rotated in one direction via the low speed hoisting striker 38, and the low speed hoisting switch LS-LU's switch lever 37 is operated by the low speed hoisting switch LS-LU. The signal starts the low-speed hoisting operation of the electric hoisting device.

As the grip 7 is further moved upward,
The switch lever 41 of the high-speed hoisting switch LS-HU is operated by the high-speed hoisting striker 42, and the electric hoisting device is switched to high-speed hoisting operation in response to a signal from the high-speed hoisting switch LS-HU.

When the upward force of the grip 7 is relaxed, the force of the upper neutral position holding spring 6 causes the press ring 2 to
The grip 7 and the operating rod 18 are moved downward through the grip 0 and the pin 19, and each striker is rotated in the other direction, and the high speed hoisting switch LS-HU is operated by the high speed hoisting striker 42. When released, the electric hoisting device is switched to low-speed hoisting operation, and then, when the operation of the low-speed hoisting switch LS-LU by the low-speed hoisting striker 38 is released, the electric hoisting device is switched to low-speed hoisting operation. operation is stopped,
Subsequently, when the grip 7 is released, the grip 7 is held at the neutral position by the force of the neutral position holding spring 6.

Furthermore, when the grip 7 is grasped with one hand and moved downward against the elasticity of the lower neutral position holding spring 6, the operating rod 18 is moved downward by the grip 7 via the pin 19. and the driving member 32 is rotated in the other direction by the operating rod 18 via the drive plate spring 33, and each striker is also rotated in the other direction by the drive member 32 via the drive shaft 31. First, use the low speed lowering striker 40 to turn the low speed lowering switch LS-LD.
When the switch lever 39 is operated, the low-speed lowering operation of the electric hoisting device is started in response to a signal from the low-speed lowering switch LS-LD.

As the grip 7 is further moved downward,
The switch lever 43 of the high-speed lowering switch LS-HD is operated by the high-speed lowering striker 44, and the electric hoisting device is switched to high-speed lowering operation in response to a signal from the high-speed lowering switch LS-HD.

When the pressing force of the grip 7 is relaxed, the force of the lower neutral position holding spring 6 causes the pressing ring 2 to
The grip 7 and the operating rod 18 are moved upwardly through the 0 and pin 19, and each striker is rotated in one direction, causing the high-speed lowering striker 44 to operate the high-speed lowering switch LS-HD. When released, the electric hoisting device is switched to low-speed lowering operation, and then, when the operation of the low-speed lowering switch LS-LD by the low-speed lowering striker 40 is released, the electric hoisting device is switched to low-speed lowering operation. operation is stopped,
Subsequently, when the grip 7 is released, the grip 7 is held at the neutral position by the force of the neutral position holding spring 6.

Therefore, in the case of the embodiment described above, by simply holding the grip 7 with one hand and moving it upward or downward, the electric hoisting device can be started and stopped, and the hoisting speed and The lowering speed can be changed.

10 to 14 show a second embodiment of the present invention, in which an upper hook 46 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 47 is connected by a bolt 14 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 47 A vertical retaining cylinder 3 is connected to a vertical male screw 48 provided in the center.
The support member 4 is constituted by the holding tube 3 and the cable support member 47 connected thereto, with the upper end portions thereof being screwed together.

A cylindrical grip 7 having anti-slip irregularities on the outer periphery is slidably fitted on the outside of the middle part of the holding cylinder 3, and grips 7 are provided on both sides of the middle part of the holding cylinder 3 in the diametrical direction. The extending slit 17 is provided, and the flange 49 of a cylindrical striker 50 is provided with a flange 49 on the outer periphery of the intermediate portion.
is slidably fitted into the middle part of the holding cylinder 3,
A vertical stopper and anti-rotation protrusion 58 is integrally provided inside the holding cylinder 3, and the protrusion 5
8 is fitted with a locking groove provided on the flange 49, and connecting screws 51 are fitted on both sides of the grip 7 in the diametrical direction.
is inserted through the slit 17 and is screwed into a female screw hole provided in the flange 49 of the striker 50.

A switch holder 55 is constructed by connecting short, small-diameter cylindrical bodies 53 and 54 to the upper and lower ends of a cylindrical body 52 extending in the vertical direction, and the striker 50 is slidably provided on the outside of the intermediate portion of the cylindrical body 52. mated,
The small-diameter cylindrical body 53 at the top of the switch holder 55 is fitted into the upper support ring 56 which is screwed and fixed to the upper part of the holding cylinder 3, and is further screwed and fixed to the lower part of the holding cylinder 3. Lower support ring 5
7, the small diameter cylindrical body 5 at the bottom of the switch holder 55
4 is fitted, and the flange 4 of the striker 50
Pressing ring 20 in contact with the upper and lower parts of 9
and an upper support ring 56 and a lower support ring 57
A neutral position holding spring 6, each made of a helical spring, is interposed in a compressed state between the two.

A low-speed hoisting switch LS-LU and a high-speed hoisting switch LS-HU placed above it are fitted into the opening provided in the upper side wall of the cylinder 52 and fixed with adhesive or the like. , the cylindrical body 52
The low-speed lowering switch LS-LD and the high-speed lowering switch LS-HD placed below are fitted into the openings provided in the lower side wall of the is connected to the power supply control unit of the electric hoisting device via an extensible spiral cable 45, and the suspended load lifting strip 2 is inserted through the spiral portion of the cable 45, and the holding cylinder 3
A luggage hanger 5 is threadedly connected to the lower end of the carrier.

In the two-speed operation operating device of the second embodiment, when the grip 7 is grasped with one hand and moved upward from the neutral position shown in FIG.
As a result of the upward movement, the switch lever 37 of the low-speed hoisting switch LS-LU is operated, and the low-speed hoisting operation of the electric hoisting device is started by a signal from the low-speed hoisting switch LS-LU.

When the striker 50 is further moved upward by the grip 7, the switch lever 41 of the high-speed hoisting switch LS-HU is operated by the striker 50, and the electric hoisting is started by the signal from the high-speed hoisting switch LS-HU. The device is switched to high speed hoisting motion.

When the upward force of the grip 7 is relaxed, the grip 7 and the striker 50 are first moved downward by the force of the upper neutral position holding spring 6, and the striker 50 operates the high-speed hoisting switch LS-HU. Since the electric hoisting device was released, the electric hoisting device was switched to low-speed hoisting operation, and then the operation of the low-speed hoisting switch LS-LU by the striker 50 was released, and the low-speed hoisting operation of the electric hoisting device was stopped. Afterwards, the grip 7 returns to the neutral position.

Next, when the grip 7 is held with one hand and moved downward from the neutral position shown in FIG. 10, the switch lever 39 of the low speed lowering switch LS-LD is operated by the striker 50, The low-speed lowering operation of the electric hoisting device is started by the signal from the switch LS-LD.

As the grip 7 is further moved downward,
High-speed lowering switch LS- with striker 50
When the HD switch lever 43 is operated, the electric hoisting device is switched to high-speed hoisting operation in response to a signal from the high-speed hoisting switch LS-HD.

When the pressing force on the grip 7 is relaxed, the grip 7 and the striker 50 are first moved upward by the force of the lower neutral position holding spring 6, and the striker 50 operates the high-speed lowering switch LS-HD. is released, the electric hoisting device is switched to low-speed lowering operation, and then the operation of the low-speed lowering switch LS-LD by the striker 50 is released, and the low-speed lowering operation of the electric hoisting device is stopped. Afterwards, the grip 7 returns to the neutral position.

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 pushing down the grip 7 while pressing it laterally and performing low-speed lowering operation. I can do it.

When carrying out this invention, when the grip 7 is moved upward, the high-speed hoisting switch LS-HU is operated before the low-speed hoisting switch LS-LU, and when the grip 7 is moving downward, the low-speed hoisting switch LS-HU is operated before the low-speed hoisting switch LS-LU. The high-speed lowering switch LS-HD may be operated before the switch LS-LD. Further, a winding leaf spring is wound around a leaf spring winding ring fitted and fixed to the drive shaft 31, and the winding inner end of the winding leaf spring is fixed to the leaf spring winding ring, and The other end of the winding leaf spring is fixed to the support frame 30, and due to the elasticity of the winding leaf spring, the drive member 32 is attached to the drive member 32 via the leaf spring winding ring and the drive shaft 31. A rotational force in the direction of winding up the spring 33 may be applied.

As the structure for attaching the load hanger 5 to the lower end of the holding cylinder 3, any structure other than that shown in the drawings may be employed. Further, as the luggage hanging tool 5, any hanging metal fitting may be used instead of the hook. 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 operation of the electric hoisting device can be started, and the grip 7 can be moved up and down above the neutral position. By changing the directional position, it is possible to switch between low-speed hoisting and high-speed hoisting, and by simply grasping the grip 7 with one hand and moving it downward from the neutral position, the hoisting operation of the electric hoisting device can be started. In addition, by changing the vertical position of the grip 7 below the neutral position, it is possible to switch between low-speed lowering and high-speed lowering. By simply performing an upward movement or a downward movement, it is possible to easily carry out two-speed hoisting operation and two-speed hoisting operation of the electric hoisting device.

[Brief explanation of drawings]

1 to 9 show a first embodiment of the present invention, in which FIG. 1 is a partially longitudinal front view showing a two-speed operation operating device for an electric hoisting device, and FIG. 1 is an enlarged longitudinal sectional front view showing the lower part of the lower part, FIG. 3 is a longitudinal sectional front view showing the upper part of the two-speed operation operating device for electric hoisting equipment, and FIG. 4 is A-A of Fig. 2.
5 is an enlarged sectional view taken along line B-B in FIG. 2, FIG. 6 is an enlarged sectional view taken along line C-C in FIG. 2, and FIG. 7 is an enlarged sectional view taken along line C-C in FIG. 2. Figure 8 is a side view showing the relationship between the striker for high-speed hoisting, the switch lever for the low-speed hoisting switch, and the switch lever for the low-speed hoisting switch. FIG. 9 is a side view showing the relationship between the switch lever and the high-speed lowering switch and the switch lever, and FIG. 9 is a front view of the traveling electric hoist having the two-speed operation operating device of the present invention. 10 to 14 show a second embodiment of the present invention, in which FIG. 10 is a longitudinal sectional front view showing a two-speed operation operating device for an electric hoisting device, and FIG. 11 is a side view thereof. , FIG. 12 is an enlarged vertical sectional front view of a part of FIG. 10, FIG. 13 is an enlarged sectional view taken along line D-D in FIG.
FIG. 14 is a front view of an electric hoisting device having a two-speed operation operating device according to 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, 7 is a grip, 13 is the control device box, 17 is the slit,
18 is an operating rod, 19 is a pin, 20 is a pressing ring,
21 is a supporting protrusion, 22 is a spring bearing ring, 23
is a snap spring, 31 is a drive shaft, 32 is a drive member, 33 is a driving leaf spring, 37 is a switch lever, 38 is a striker for low speed hoisting, 39 is a switch lever, 40 is a striker for low speed hoisting, 41 is a switch lever , 42 is a high-speed hoisting striker,
43 is a switch lever, 44 is a striker for high-speed lowering, 45 is a cable, 50 is a striker, 51
is a connecting screw, 55 is a switch holder, 56 is an upper support ring, 57 is a lower support ring, LS-
LU is a switch for low-speed hoisting, LS-HU is a switch for high-speed hoisting, LS-LD is a switch for low-speed hoisting,
LS-HD is a high-speed lowering switch.

Claims (1)

[Claims] 1 A load hanging tool 5 is attached to the hanging end of the load lifting strip 2 hanging from the electric hoist main body 1 via a support member 4 having a holding tube 3 extending in the vertical direction.
A grip 7, which is held at a neutral position by a neutral position holding spring 6, is fitted into the holding cylinder 3 so as to be able to move up and down. The low-speed hoisting switch LS-LU and the high-speed hoisting switch LS-HU are operated, and the low-speed hoisting switch LS-LD and the high-speed hoisting switch are sequentially operated via the striker by the downward movement of the grip 7.
A two-speed operation control device for an electric hoisting device, characterized in that it is equipped with an LS-HD.