JPH0240597B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a driving operation device for operating a hoisting switch and a hoisting switch of an electric hoisting device such as an electric chain block or an electric hoist. be.

[Conventional technology]

Conventionally, the operating device for electric hoisting equipment is
As disclosed in Japanese Patent Publication No. 33-671, a grip switch housing is provided with a flange in the middle of a connecting rod that connects a hanging hook and a pulley support member, and is fitted into the connecting rod so as to be slidable up and down. Among these, an operating device is known in which an insulating seat, a movable contact plate, and a fixed contact plate are provided between the flange and the side plates on both sides of the grip switch housing, respectively.

[Problem to be solved by the invention]

In the case of the conventional operating device, an insulating seat, a movable contact plate, and a fixed contact plate are provided in the grip switch housing between the flange of the connecting rod and the side plates on both sides of the grip switch housing. ,
The grip switch housing becomes considerably thick, which impairs the operability when gripping the grip switch housing and moving it up and down.

In addition, in order to install an insulating plate, a movable contact plate, a fixed contact plate, etc. in the grip switch housing that is slidably fitted into the connecting rod, the grip switch housing is configured as a split type. It is necessary to butt them together and connect them with a suitable joint, but in this case, the joint becomes an obstacle when gripping the grip switch housing.

SUMMARY OF THE INVENTION An object of the present invention is to provide an operating device for an electric hoisting device that can advantageously solve the above-mentioned problems.

[Means to solve the problem]

In order to achieve the above object, in the operating device for an electric hoisting device of the present invention, a control device box 3 is provided at the hanging end of the strip 2 for lifting and lowering a suspended load hanging from the main body 1 of the electric hoisting device. A load hanger 5 is connected via a holding cylinder 4 extending in the vertical direction, and a grip 7 held in a neutral position by a neutral position holding spring 6 is fitted into the holding cylinder 4 so as to be able to rise and fall freely. Inside the control device box 3 is a hoisting switch LS which is operated via an interlocking mechanism and a hoisting striker 8 by the upward movement of the grip 7.
-U, and a lowering switch LS-D which is operated by the lowering movement of the grip 7 via an interlocking mechanism and a lowering striker 9.

〔Example〕

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

1 to 10 show an embodiment of the present invention, in which wheels 13 of a trolley 12 equipped with a traveling drive device 11 consisting of an electric motor with a speed reducer are attached to a lower flange of a traveling rail 14. The electric hoisting device body 1, which is placed on the electric tube block body, is connected to the lower part of the frame 15 of the trolley 12, and a suspended load consisting of a load chain hanging from the load sheave of the electric hoisting device body 1 is connected to the lower part of the frame 15 of the trolley 12. The upper end of the control device box 3 is connected to the hanging end of the lifting strip 2 by a bolt 16, and the flange 17 at the upper end of the holding cylinder 4 is fixed to the lower end of the control device box 3 by a bolt 18. A cylindrical grip 7 having anti-slip irregularities on the outer periphery is slidably fitted into the middle part of the holding cylinder 4, and grips 7 extending in the vertical direction are fitted on both sides of the middle part of the holding cylinder 4 in the diametrical direction. A slit 19 is provided, and a pin 21 extending in the diameter direction of each slit 19 and the grip 7 is inserted through the operating rod 20 disposed in the holding cylinder 4.
Both ends of 1 are locked to grips 7.

A pressing ring 22 with an outer flange is fitted to the operating rod 20 on both upper and lower sides of the pin 21, and a supporting protrusion 23 is provided inside the central part of the holding cylinder 4 in the height direction. Snap rings 25 that support the spring bearing rings 24 are fitted into annular grooves provided at the upper and lower parts of the inner ring 4, and between each press ring 22 and each spring bearing ring 24, a neutral spring made of a helical spring is inserted. When the position retaining spring 6 is interposed in a compressed state and each press ring 22 is pressed by the neutral position retaining spring 6 and pressed against the supporting projection 23, each press ring 22 releases the grip via the pin 21. 7 and the operating rod 20 are held in the neutral position.

A pair of semicircular sleeves 27 each having a locking flange on the outer periphery of the upper end are fitted into a small diameter shaft portion 26 provided at the upper part of the luggage hanging device 5 consisting of a hook.
The pair of semicircular sleeves 27 are fitted into a support tube 29 that is provided with a locking groove 28 extending in the vertical direction and a male thread on the outside, and the support tube 2
Reference numeral 9 is screwed into a female thread provided at the lower end of the holding cylinder 4, and a locking set screw 30 screwed into the lower end of the holding cylinder 4 is inserted into the locking groove 28.
A stopper 31 is inserted between the upper end surface of the load hanging tool 5 and the snap ring 25 to prevent the load hanging tool 5 from floating up.

A support frame 32 is provided within the control device box 3.
is fixed by a screw 33, and a drive shaft 34 extending laterally is rotatably supported by a support frame 32, and a thin metal strip-shaped drive member 35 is fitted onto the drive shaft 34 and fixed. A drive plate spring 36 made of a spring is wound around the drive plate spring 36, one end of which is fixed to the drive member 35, and the other end of the drive plate spring 36 is fixed to the operating rod 20.
It is fixed by a screw 37 to the upper end of the holder.

A winding leaf spring 39 is wound around a leaf spring winding ring 38 that is fitted and fixed to the drive shaft 34, and the winding inner end of the winding leaf spring 39 is connected to the leaf spring winding ring 38. A leaf spring 3 fixed to and used for winding the spring 3
The other end of 9 is connected to the support frame 32 with a screw 4.
0, and the elasticity of the winding leaf spring 39 imparts a rotational force in the direction of winding up the drive leaf spring 36 to the drive member 35 via the leaf spring winding ring 38 and the drive shaft 34. Ru.

A drive gear 41 is rotatably fitted onto the drive shaft 34 between the drive member 35 and the leaf spring wrapping ring 38 , and a drive pin 42 fixed to the drive member 35 is connected to the drive gear 41 . A delay rotation gap is provided between the drive pin 42 and both edges of the pin rotation direction of the pin accommodation hole 43 , and a delay rotation gap is provided in the support frame 32 . An electric lifting speed controller 10 consisting of a potentiometer or a variable resistor is fixed, and the operation shaft 44 of the lifting speed controller 10 is fixed.
A driven gear 45 fixed to is meshed with the drive gear 41.

A hoisting switch LS- is attached to the support frame 32.
U and the lowering switch LS-D are fixed with screws, and the lowering switch LS-D is fixed to the drive shaft 34.
A hoisting striker 8 that operates the switch lever 46 of the LS-U and a hoisting striker 9 that operates the switch lever 47 of the hoisting and lowering switch LS-D are fixed, and the hoisting striker 9 that operates the switch lever 47 of the hoisting and lowering switch LS-D is fixed. ，
Lowering switch LS-D and lifting speed controller 1
0 is connected to the power control section of the electric hoisting device via a cable 48.

An interlocking mechanism for operating the striker is formed by an operating rod 20 that is moved up and down by the grip 7 via a pin 21, and a drive shaft 34 that is rotated by the operating rod 20 via a driving plate spring 36 and a driving member 35. is configured. Also, an operating rod 20 is moved up and down by the grip 7 via a pin 21.
and a driven gear 45 which is rotated from the operating rod 20 via the drive plate spring 36, drive member 35, drive pin 42 and drive gear 41, forming an interlocking mechanism for operating the elevation speed controller. .

In the operating device for the electric hoisting device of the above embodiment, when the grip 7 is grasped with one hand and moved upward against the elasticity of the neutral position holding spring 6 on one side, the grip 7 The operating rod 20 is moved upward via the pin 21, and the driving member 35 is rotated in one direction by the operating rod 20 via the drive plate spring 36, and the driving member 35 rotates the drive shaft 34. The hoisting striker 8, the hoisting striker 9, and the leaf spring winding ring 36 are also rotated in one direction through the hoisting striker 8, and the hoisting switch LS-U is first rotated by the hoisting striker 8.
When the switch lever 46 is operated, hoisting operation of the electric hoisting device is started in response to a signal from the hoisting switch LS-U.

As the grip 7 is further moved upward,
The driving pin 42 of the driving member 35 engages with the driving gear 41, and the driving pin 4 is driven by the driving member 35.
2, and the drive gear 41 rotates the operating shaft 44 of the elevation speed controller 10 in one direction from the neutral position via the driven gear 45. Speed controller 1
The hoisting speed is increased by the signal from 0.

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
2 and the pin 21, the hoisting striker 8, the hoisting striker 9, and the operating shaft 44 are rotated in the other direction, so that the hoisting speed increases. Then, the operation of the switch lever 46 of the hoisting switch LS-U by the hoisting striker 8 is released, and the hoisting operation of the electric hoisting device is stopped.

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 20 is moved downward by the grip 7 via the pin 21. The operating rod 20 rotates the drive member 35 in the other direction via the drive leaf spring 36, and the drive member 35 rotates the hoisting striker 8 and the hoisting striker via the drive shaft 34. 9 and the plate spring winding ring 38 are also rotated in the other direction, and first the lowering switch LS-D is activated by the lowering striker 9.
When the switch lever 47 is operated, the lowering operation of the electric hoisting device is started in response to a signal from the lowering switch LS-D.

As the grip 7 is further moved downward,
The driving pin 42 of the driving member 35 engages with the driving gear 41, and the driving pin 4 is driven by the driving member 35.
2, and the drive gear 41 rotates the operation shaft 44 of the elevation speed controller 10 in the other direction from the neutral position via the driven gear 45. Speed controller 1
The lowering speed is increased by the signal from 0.

When the push-down force of the grip 7 is relaxed, the push-up ring 2 is moved by the force of the lower neutral position holding spring 6.
2 and the pin 21, the hoisting striker 8, the hoisting striker 9, and the operating shaft 44 are rotated in one direction, so that the hoisting speed increases. Then, the operation of the switch lever 47 of the lowering switch LS-D by the lowering striker 9 is released, and the lowering operation of the electric hoisting device is stopped.

Therefore, in the case of the above embodiment, the hoisting switch LS-U or the hoisting down switch LS-D can be activated by simply holding the grip 7 with one hand and moving it upward or downward.
and the operation of the lifting speed controller 10 that adjusts the hoisting speed and lowering speed.

11 to 13 show another example of the structure for attaching a load hanging device to a holding tube, in which a chain is attached to the side surface of a pair of semicircular support members 49 that are provided with locking flanges on the outer periphery of the upper end. A link fitting recess 50 is provided, and the chain link fitting recess 50 of each semicircular support member 49 is fitted to the upper part of the upper end chain link in the suspension chain 51, and the chain link fitting recess 50 of each semicircular support member 49 is fitted to the upper part of the upper end chain link of the suspension chain 51. A support pin 52 is inserted across the chain link,
The pair of semicircular support members 49 are fitted into a support tube 29 that is provided with a locking groove 28 extending in the vertical direction and a male thread on the outside, and the support tube 29 is fitted at a lower end inside the holding tube 4. It is screwed into the provided female thread.

Further, the locking set screw 30 screwed into the lower end of the holding cylinder 4 is fitted into the locking groove 28, and the upper part of the load hanging device 5, which is a hook having a head at the upper end, is inserted into the locking groove 28. The chain link at the lower end of the hanging chain 51 is rotatably fitted into the lower part of the two-part connecting fitting 53.
The two halves of the connecting metal fittings 53 are inserted between them, and the two halves of the connecting metal fittings 53 are connected by bolts 54 that are fitted and inserted between the two halves of the connecting metal fittings 53 and the chain link.

When carrying out this invention, the interlocking mechanism for operating the striker and the interlocking mechanism for operating the elevation speed controller may be of any structure other than that shown in the figures, for example, the lower part of a rack extending in the vertical direction is connected to the upper part of the operating rod 20. However, an interlocking mechanism may be adopted in which a drive member consisting of a pinion that engages with the rack is fixed to the drive shaft 34.

The leaf spring winding ring 38 and the winding leaf spring 39 may be omitted, and any hanging metal fittings may be used as the load hanging tool 5 instead of the hooks. Furthermore, the present invention can be implemented in an operating device for an electric hoist having a winding drum for lifting and lowering a wire rope.

〔Effect of the invention〕

Since this invention is configured as described above,
This produces the effects described below.

When the grip 7 is moved upward from the neutral position, the hoisting switch LS-U is operated via the interlocking mechanism and the hoisting striker 8, and hoisting operation of the electric hoisting device is started, and the grip is When the lowering switch 7 is moved downward from the neutral position, the lowering switch LS is activated via the interlocking mechanism and the lowering striker 9.
-D is operated to start the lowering operation of the electric hoisting device. Therefore, by simply holding the grip 7 in one hand and moving it upward or downward, the hoisting switch LS-D is operated. U
By operating the lowering switch LS-D and loosening the pressing force that moves the grip 7 in the vertical direction, the grip 7 is automatically moved by the force of the neutral position holding spring 6. In particular, in the case of the present invention, the hoisting switch LS-U, which is operated via the hoisting striker 8, and the hoisting switch LS-U, which is operated via the hoisting striker 9, can be moved to a neutral position. The lower switch LS-D is not housed in the holding tube 4, but in the control device box 3 provided at the top of the holding tube 4, so the holding tube 4 and the grip 7 are made thinner. Effects such as making the grip 7 easier to grip and improving driving operability by gripping and moving the grip can be obtained.

[Brief explanation of drawings]

1 to 10 show an embodiment of the present invention, in which FIG. 1 is a partially longitudinal side view showing an operating device for an electric hoisting device, and FIG. FIG. 3 is a vertical side view showing the upper part of the electric hoist operating device; FIG. 4 is an enlarged sectional view taken along the line A-A in FIG. 2; The figure is a sectional view taken along the line B-B in Fig. 2, Fig. 6 is a sectional view taken along the line C-C in Fig. 2, Fig. 7 is a front view showing the relationship between the striker and the switch, and Fig. 8 is the sectional view taken along the line C-C in Fig. 2. FIG. 9 is a cross-sectional view taken along the line E-E of FIG. 3, and FIG. 10 is a side view of an electric hoist having the operation device of the present invention. Figures 11 to 13 show other examples of the attachment structure of the load hanging bracket to the holding tube, in which Figure 11 is a vertical side view, and Figure 12 is a cross section taken along the line F--F in Figure 11. figure,
FIG. 13 is a sectional view taken along the line GG in FIG. 11. 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 control device box, 4 is a holding cylinder, 5 is a load hanging device, 6 is a spring for holding a neutral position,
7 is a grip, 8 is a hoisting striker, 9 is a hoisting striker, 10 is a lifting speed controller, 19 is a slit, 20 is an operating rod, 21 is a pin, 22 is a pressing ring, 23 is a supporting protrusion, 24 is a spring bearing ring, 25 is a snap spring, 26 is a small diameter shaft portion, 2
7 is a semicircular sleeve, 28 is a rotation prevention groove, 29
30 is a support cylinder, 30 is a set screw for preventing rotation, 34 is a drive shaft, 35 is a drive member, 36 is a drive plate spring, 38
39 is a leaf spring winding ring, 4 is a leaf spring winding ring, and 4 is a leaf spring winding ring.
1 is a driving gear, 42 is a driving pin, 43 is a pin receiving hole, 44 is an operating shaft, 45 is a driven gear, LS-U
is a hoisting switch, and LS-D is a hoisting switch.

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 control device box 3 and a holding tube 4 extending in the vertical direction. A grip 7 is held in the neutral position by a neutral position holding spring 6 on the holding cylinder 4.
is fitted so as to be able to rise and fall freely, and the control device box 3
Inside, there is a hoisting switch LS-U which is operated via an interlocking mechanism and a hoisting striker 8 by the upward movement of the grip 7, and a hoisting switch LS-U which is operated by an interlocking mechanism and a hoisting striker 9 by the downward movement of the grip 7. An operating device for an electric hoisting device, characterized in that it is provided with a lowering switch LS-D to be operated.