JPH10152292A - Operation confirming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take in the operating state of equipment without touching the specific part of the equipment by providing a solenoid, having a movable iron core reciprocated being interlocked with the operating state of the equipment, inside a grip of an operating lever, and striking the grip with the movable iron core from the inside to vibrate the whole grip. SOLUTION: A solenoid 34 is horizontally installed in a housing hole 28 laterally piercing a grip 27 of an operating lever 11. Interlocked with the actual operating state of a hook elevating drum operated by the operating lever 11, one end of a movable iron core of the solenoid 34 strikes a left cap 30 from the inside to vibrate the whole grip 27. An operator can therefore take in the actual operating state of the hook elevating drum, operated by the operating lever 11, through vibration without making effect to touch the specific part of the grip 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation check device used for a mobile crane and the like.

[0002]

2. Description of the Related Art FIG. 3 shows a mobile crane 1 having a tower crane specification. A revolving unit 4 having a driver's seat 3 is provided on the upper surface of a traveling unit 2 having a pair of right and left crawlers. At the front end of the revolving unit 4, a boom 6 provided with a jib 5 at the upper end so as to be able to move up and down is held upright, and a hook block 7 suspended from the tip of the jib 5 is provided on the revolving unit 4. The winch 8 is lifted and lowered by winding and unwinding of the rope 10 by the hook lifting drum 9.

In such a large-sized mobile crane 1, the hook block 7 is moved up and down at a position significantly away from the driver's seat 3, so that the hook block 7 is moved up and down at a very low speed. In such cases, it is difficult to visually recognize from the driver's seat 3 whether the hook block 7 is actually lifted or lowered.

For this reason, conventionally, as shown in FIG. 4, an operation lever 11 for operating the lifting and lowering of a hook block 7 is known.
Is formed by a cup-shaped receiving seat 13 and a cap 14 attached so as to cover the upper portion of the receiving seat 13 to form a hollow structure, and a cylindrical shape is wound in a space formed therein. A coil 15 comprising an insulated conducting wire;
A solenoid 18 having a movable core 16 inserted and retractably inserted into the axial center of the coil 15 and a resilient body 17 for urging the movable core 16 in a direction in which the coil 15 is pulled out is vertically oriented. It is installed, and a vibration rubber 20 is attached to the tip of the movable iron core 16 of the solenoid 18 so as to be exposed to the outside through an opening 19 provided at the top of the cap 14. By intermittently exciting the coil 15 of the solenoid 18 in conjunction with the actual operating state of the actuator 9, the driver can feel the actual operating state of the hook elevating drum 9 by the reciprocating vibration of the movable iron core 16. Was.

When the actual operating state of the hook lifting / lowering drum 9 is linked to the operation of the solenoid 18, for example, as shown in FIG. A plurality of detection ribs 22 are annularly protruded, and passage of each detection rib 22 is detected by a proximity switch 23 at a predetermined fixed detection position, and based on the number of pulses of a detection signal 24 from the proximity switch 23. An operation signal 26 (on / off signal for the operation power supply) output from the controller 25 causes the solenoid 18 to operate.
Was intermittently excited.

[0006]

However, in the conventional structure as described above, when the driver grips the grip 12 of the operation lever 11 and performs an operation, the vibration rubber 20 exposed at the top of the grip 12 is removed. Unless the driver touches the vibration rubber 20, the driver cannot pay any attention to touch the vibration rubber 20 during the operation, so that it is difficult to concentrate on the operation.

[0007] The present invention has been made in view of the above-described circumstances, and allows the user to feel the actual operating state of a device operated by the operation lever by vibration without paying attention to a specific part of the grip. It is intended to be.

[0008]

According to the present invention, there is provided a solenoid provided inside a grip of an operation lever, which reciprocates a movable iron core in conjunction with an operation state of a device operated by the operation lever. An operation check device, characterized in that the iron core is configured to strike the grip from the inside to vibrate the entire grip.

Therefore, in the present invention, when the movable iron core of the solenoid is reciprocated in conjunction with the actual operation state of the device operated by the operation lever, the movable iron core strikes the grip from the inside and vibrates the entire grip. Therefore, even if the driver does not pay attention to touch a specific part of the grip, the actual operating state of the device operated by the operation lever can be sensed by vibration.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an example of an embodiment of the present invention. In this embodiment, an operation for operating a hook lifting / lowering drum 9 in a mobile crane 1 constructed in the same manner as in FIG. A grip body 29 in which a grip 27 of the lever 11 has a storage hole 28 penetrating in the lateral direction.
And a cap 30 integrally mounted on both sides of the grip body 29 and closing both ends of the storage hole 28. The storage hole 28 has a coil formed of an insulated conductive wire wound in a cylindrical shape. A solenoid 34 having a movable core 32 movably inserted into the axis of the coil 31 and a resilient body 33 for urging the movable core 32 in and out of the coil 31. One end of the movable iron core 32 of the solenoid 34 is attached to the cap 30
Is hit from the inside so that the entire grip 27 can be vibrated.

That is, the movable iron core 32 of the solenoid 34 has one end pressed against the inside of the left cap 30 in FIG. 1 by the repulsive force of the elastic body 33 when the coil 31 is not excited. When the armature is excited, the movable iron core 3 resists the repulsive force of the elastic body 33 by electromagnetic force.
2 is pulled to the right side in FIG. 1 and one end is separated from the left cap 30 in FIG. 1, and when the coil 31 is de-energized again, the movable core 32
Is returned to the original position, and one end is made to collide with the inside of the left cap 30 in FIG.

Each of the caps 30 is made of a hard material having a good vibration transmission property and has an appropriate thickness, and is tightly attached to the grip body 29 so that the vibration is transmitted to the grip body 29 well. It is mounted integrally by adopting a simple fitting structure and the like.

When the actual operation state of the hook lifting / lowering drum 9 is linked to the operation of the solenoid 34, a method similar to the conventional method described above with reference to FIG.

When the movable iron core 32 of the solenoid 34 is reciprocated in conjunction with the actual operation of the hook lifting drum 9 operated by the operation lever 11, one end of the movable iron core 32 is turned on in FIG. The left and right caps 30 are hit from the inside to vibrate the entire grip 27, so that the hook elevating drum operated by the operation lever 11 can be operated even if the driver does not pay attention to touch a specific part of the grip 27 consciously. 9 can be sensed by vibration.

Therefore, according to the above embodiment, the actual operation state of the hook lifting / lowering drum 9 operated by the operation lever 11 is vibrated even if the driver does not consciously touch the specific part of the grip 27. Therefore, the driver can concentrate on the operation of the operation lever 11 alone, thereby greatly improving work safety.

Further, since the structure can be simplified as compared with the conventional case, it is possible to reduce the processing labor in manufacturing and the manufacturing cost.

The operation confirmation device of the present invention is not limited to the above-described embodiment, but may be an operation lever for performing operations other than raising and lowering a hook block in a mobile crane, for example, raising and lowering a boom and a jib. The present invention may be applied to a grip of an operating lever for operating various devices other than a mobile crane, and may be variously modified without departing from the gist of the present invention. Can of course be added.

[0019]

According to the operation confirmation device of the present invention described above, the actual operation state of the device operated by the operation lever can be sensed by vibration, so that the driver can concentrate on only the operation of the operation lever. As a result, the safety of work can be greatly improved, and the structure can be simplified as compared with the conventional case, so that the processing labor in manufacturing can be reduced and the manufacturing cost can be reduced. And various other excellent effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG.

FIG. 3 is a side view showing an example of a mobile crane.

FIG. 4 is a sectional view showing a conventional example.

FIG. 5 is an explanatory diagram relating to the interlocking of the solenoid of FIG. 4 and a hook elevating drum.

[Explanation of symbols]

 9 Hook lifting drum (equipment) 11 Operation lever 27 Grip 32 Moving iron core 34 Solenoid

Claims (1)

[Claims] 1. A solenoid for reciprocating a movable core in conjunction with an operation state of a device operated by the operation lever, inside a grip of the operation lever, and the movable core of the solenoid strikes the grip from inside. An operation check device characterized in that the entire grip can be vibrated.