JPH0233088A - Hook device for hoisting machine - Google Patents

Abstract

PURPOSE:To eliminate the unnecessary dangling of a wire, secure the safety in work and prevent a hoisting mechanism from being broken by suspending a suspended article by the wire which is in the suspended state from a supporting pin and is driven out from a reel mechanism equipped with a revolution driving means. CONSTITUTION:One edge of a wire 5 can be wound onto a reel 40 from the suspended state in slinging-out by revolving the reel 40 for the connection of the wire 5 by a driving motor 31 at a prescribed number of revolution. Even if a suspending beam body is return-transported in this state to a load applying work position for the next loading work, the wire 5 is perfectly prevented from being hooked by an obstacle on the periphery or being collided with an operator in the course of the return transport. Therefore, the wire 5 is wound onto the reel 40, and a hoisting machine can be return-transferred free from the dangling of the wire 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hook device used as a hoisting device for a crane or the like, and relates to a hook device that is effective for, for example, cargo handling work.

(Prior art) Conventionally, various cranes, etc. (hereinafter collectively referred to as "lifting machines") used for cargo handling work have been used to hang loads on hooks and unload suspended loads. This work is usually carried out between two predetermined positions separated by transport work in a suspended state.

In these operations, as in general operations, there is a desire to reduce the number of workers by saving labor in cargo handling operations, but loading and unloading operations need to be carried out on the hooks of lifting machines. It is difficult to automate wire slinging and slinging, and no effective automation of the work has been realized to date, and as a result, many people are currently engaged in the work.

By the way, the following problems have been pointed out in the past in such cargo handling work. In other words, between the loading and unloading work positions, a lifting machine including a hook is transported with the object loaded, and after unloading, the next load is placed for work, and the next load is placed for work. The operation of returning to the position (hereinafter referred to as return transport) is performed, but if the wire that was suspending the load hangs down during this return transport, it may be dangerous for the worker or the wire may become an obstruction. The lifting machine may be damaged if it gets caught on the
In some cases, such products may be damaged.

Needless to say, if this wire is separated from the lifting machine at the unloading position, the above problem will not occur.
Since such a method requires work efficiency and the preparation of a large number of wires, it is generally not an advantageous method except for special work.

(Problems to be Solved by the Invention) From the above points of view, the present invention is a hook device for a crane used for example in cargo handling work, in which a wire used especially for lifting loads (hanging objects) can be installed in the hook device when it is not needed. This was done in order to provide a hook device with a novel structure that can be stored.

(Means for Solving the Problems) From this point of view, the features of the hook device for lifting equipment according to the present invention, which has been made to achieve the above-mentioned various objects, are as follows: It has a hook pivotably attached to the fuselage frame to which a sling at one end of the wire is removably provided, and a support pin to which the other end of the wire is connected, and the support pin revolves around the wire. A rotating body wrapped around the shaft (
The reel mechanism is equipped with a reel mechanism mounted on the body frame having a reel (hereinafter referred to as a reel), and a rotation drive means for rotating the reel of the reel mechanism. It is located in a place configured to suspend objects by wire.

In the above, the sling to be hung on the hook may be any general type such as a wire chain or a nylon sling.

The hook device of the present invention may be one in which the aircraft body equipped with the above-mentioned predetermined mechanism or device is directly suspended from a wire cable of a crane, or the aircraft body may be suspended by a hook provided at the tip of the wire cable. The airframe may be lowered, or the airframe may be integrally assembled to a traveling body such as a lane for overhead running.

Further, in the present invention, as the rotation driving means for rotating the reel of the reel mechanism, an electrically driven motor, a pneumatic or hydraulic rotating machine, or the like can be used as appropriate.

(Function) The present invention has the above-mentioned configuration, so that heavy objects (loads)
When hoisting a load, the wire is unwound from the reel of the reel mechanism to support the load, and when not hoisting a load, one end of the wire is removed from the hook and the wire is unwound from the reel of the reel mechanism on the other end. Since the wire is wound up, the wire does not hang down from the fuselage unnecessarily.

(Example) The present invention will be described below based on an example shown in the drawings. This embodiment is explained with reference to FIGS. 1 to 5, and
This embodiment shows an example in which a hook device is assembled to a hanging beam main body 20.

To explain the overall characteristics of the lifting machine of this embodiment, the hook device of this embodiment is pivotally attached to the lifting beam main body 20 by a pin 21, as shown in FIGS. 4 and 5. The hanging beam main body 20 is connected to a crane (
(not shown). Reference numeral 23 denotes a power supply and operation signal transmission cable from the crane side, which is taken into a predetermined control circuit inside the beam through a connector 24. Note that 25 is a signal light provided on the upper part of the suspension beam body 20, and is used to display the operation of the suspension beam body 20 or the control state of the hook device according to a predetermined rule.

In FIGS. 1 to 3, reference numeral 1 denotes a body that also serves as a structural member of the hook device, and one end of a wire 5 used for suspending a load is connected to the body frame 2, which will be described later, in the form of a piece. It can be attached to and detached from the hook 6, and generally,
The slinging and unslinging are done manually by the worker, but in this example, the slinging can be done automatically.

This point will be discussed later.

The other end of the wire 5 is wound onto a reel 40 by a reel mechanism 30 mounted on the body 1, which is a characteristic feature of this example, so that the wire 5 is not sagged when not suspended. This reel mechanism 30 will be described in detail below.

Reference numeral 40 indicates a reel of the reel mechanism 30 for winding the other end of the wire 5, and this reel 40
It is provided so that it can be rotated as appropriate by a drive motor 31 mounted on the drive motor 31. 32 is a reel rotating shaft. A pin 33 to which the other end 5b of the wire is tightly attached is fixed to a part of the reel 40, so that the wire 5 is wound around the shaft of the reel 40 as the reel 40 rotates. The diameter of the shaft for winding the wire on the reel 40 may be determined in accordance with the characteristics, dimensions, etc. of the wire used.

A gear portion 34 with a small number of teeth is provided on the rotation shaft of the reel 40, and a gear portion 35 with a number of canine teeth for rotational position detection is meshed with the gear portion 34, and a protrusion 38. Detection sensors 38 and 39 can detect that the position 37 has been rotated by a certain angle. Thereby, the wire 5 of a predetermined length can be wound or unwound to the state shown in FIG. Note that the present invention is not limited to such a detection device for unwinding and winding a wire. For example, since no particular weight is applied to the wire when winding the wire, the roll 40 is of a type that can slip and rotate when a predetermined load or more is applied to the drive motor 31, and the wire is generally unwound. The final state shown in FIG. 1 may depend on this slip, and in this case there is no need to provide a rotation detection mechanism.

Next, in this example, an automatic operation mechanism from the hook 6, which is characteristically configured together with the above-mentioned reel mechanism, will be explained.

In FIGS. 1 to 3, reference numeral 1 denotes a body that also serves as a structural member of the hook device. A drive motor 3 is mounted on a part of the lower part of this body 1, and its rotation shaft 4 is attached to the frame 2. A rotary lever 12, which will be described later, is attached to the tip of the through hole and rotated integrally therewith.

Reference numeral 6 denotes a hook that is rotatably fitted onto the rotating shaft 4, and has a piece-like shape as shown in the figure so that the ball of the wire 5 can be hung thereon. 7 indicates the mouth opening (hereinafter simply referred to as opening) of this piece-shaped hook.

Reference numeral 8 denotes a stop member for preventing the wire from coming off, which is rotatably pivoted near the base of the hook 6 by a pin 9. In this example, a stop member 8 is provided in a pair on both sides of the hook and spreads out in a fan shape from the pivot part. It is constructed by combining the shapes of
The tip side of the sector forms an arc long enough to close the opening lower part of the hook 6. Furthermore, when the hook 6 is directed vertically downward due to its own weight, the side surface of the fan-shaped tip of the stopper member 8 comes into contact with the inside of the piece-shaped tip of the hook 6, as shown in FIG. It is provided so as to be stationary and to prevent the wire from coming off from the hook 6. Furthermore,
As shown in FIG. 2, this stopper member 8 is provided with a sideward engaging protrusion 10 so as to be rotated when engaged with a rotation lever, which will be described later. A hook hook 11 is provided for rotating the hook 6 together after a certain angle of relative rotation.

Reference numeral 12 designates the above-mentioned rotary lever, which is attached to the rotating shaft of the drive motor 3 so as to be driven and rotated together with the rotary lever, and is rotated clockwise in the figure from the rest position shown in FIG. When rotated, the retaining protrusion 10 of the stop member 9
After the stop member 9 has been rotated by a certain angle, the turning engaging portion 11 engages with the hook 6, and the rotating lever 12, The stop member 8 and the hook 6 can be rotated together in the clockwise direction in the figure. Third
The figure shows a state in which the hook 6 has been rotated to the ball-off position by the above-mentioned integral rotation, and in this state, the stopper member 8 has opened the opening of the hook 6, and the wire can easily come off the ball. I know that I can do it.

Note that this rotary lever 12 is provided with position detection protrusions 13 and 14 for position detection so as to stop its rotation at the position shown in FIG. 1 and the position shown in FIG. When detected, the rotation of the drive motor 3 is stopped.

According to the above configuration, in the state shown in FIG. 1, the hook 6 and the rotating shaft 4 of the drive motor 3 are in a rotatable relationship, and there is no linkage relationship for transmitting rotational force between them. The hook 6 takes a vertically downward position due to its own weight. The other end of the wire 5 is suspended vertically downward from the pin 33 of the reel mechanism 30, and the load of the suspended heavy object is transmitted from the pin 33 to the shaft 32 on which the reel 40 is fitted, and the wire 5 is suspended by the machine frame 1. will be done.

Since the stop member 8 is also disengaged from the drive motor 3, it rotates around the pin 9 under its own weight, and the side surface of its fan-shaped end comes into contact with the inside of the hook-shaped end of the hook 6, thereby locking the wire. This will prevent the ball from coming off. The wire 5 can be easily hung on the hook 6 in the state shown in FIG. 1 by the operator rotating the stopper member 8 since it is freely rotatable in the clockwise direction in the figure.

Even if a predetermined heavy object is hung by hooking a wire to the hook in the state shown in FIG. 1, the hook 6 is in a sufficiently spaced relationship with the rotating lever, and as described above, there is a relationship in which rotational force is transmitted between the two. Since there is no force, there is no risk of unnecessary rotational impact or other forces acting on the drive motor 3. Further, even when a heavy object is suspended with the hook slightly inclined, the same feature as described above is obtained in that no force is transmitted to the drive motor 3.

Next, when the drive motor 3 is rotated from the state shown in FIG. 1 and the rotating lever 124 is rotated in the clockwise direction in the figure, the stop member 8 first rotates as described above, and the opening lower part of the hook is opened, and then the opening lower part of the hook is opened. Together with this, the hook 6 rotates, and furthermore, these together reach the state shown in FIG. 3, and the rotation of the drive motor is stopped.

During this series of operations, the lower opening of the wire 5 hooked on the hook 6 is open, and the hook 6 gradually rotates with its opening facing downward. It will naturally fall under its own weight and will automatically come off the hook 6.

After the wire 5 is removed, the hook 6 is attached to the rotating lever 12.
The wire can be returned to the position shown in FIG. 1 and rotated to prepare for the next wire hooking.

On the other hand, the other end of the wire 5 can be wound onto the reel 40 by rotating the drive motor 31 a predetermined number of times to connect the other end of the wire 5. Even if the hanging beam body is returned to the working position for the next load to be carried out, the wire 5 may get caught on surrounding obstacles or the worker may The effect is that there is no chance of getting hit.

In the above embodiment, the locking member of the hook 6 is rotated by its own weight to close the opening of the hook, but this may be configured so that the opening is closed by a spring. The spring type has the effect of reliably closing the opening.

Further, the drive motor for rotating the reel (or rotating the hook) is an example of rotational driving means, and a hydraulic or pneumatic rotating machine or a cylinder device may also be used. Furthermore, it is of course possible to use a known torque limiter coupling or the like in the driving force transmission system.

According to this embodiment having the above-described configuration, the wire 5 can be appropriately wound onto the reel 40 and the lifting machine can be moved without hanging the wire 5.

(Effects of the Invention) As explained above, according to the present invention, as a hook for a crane used in cargo handling work, the wire is not left hanging when the wire is not used, but is rolled up. Because it can be transported, work safety is ensured, and surrounding equipment can be transported.

There is no adverse effect such as damage to the loaded products, and there is an effect that damage to the lifting machine is prevented.

In addition to the above-mentioned effects, a hook device with an automatic function can provide a hook device with a new structure that is useful for automating cargo handling operations, as well as the following effects: can.

■Kaku! A hook device having a structure with fewer v1 mechanisms can be provided.

■Unnecessary detachment of the slung wire from the hook is prevented, and this detachment prevention function is automatic and sometimes deactivated.

■No unreasonable force is applied to the power device such as the hook rotation mechanism,
There is less risk of damage to the equipment. This is particularly effective when an impact or the like is applied to the hook.

(2) Even when the hanging direction is slightly inclined, no unreasonable force is applied because the hook and the power device for rotating the hook are not mechanically engaged.

■Since automatic pressure release is possible, automation of cargo handling work and remote control are possible.

■Automatic pressure release eliminates the need for workers, making it suitable for unloading work to hazardous areas9

[Brief explanation of the drawing]

Figure 1 is a front view showing an outline of the configuration of a hook device equipped with a reel mechanism for wire winding according to the present invention, Figure 2 is a longitudinal side view of the same, and Figure 3 is a diagram showing the wire being removed from the hook. FIG. 4 is a front view of a hanging beam main body having a beam provided with a pair of hook devices on the left and right sides, and FIG. 5 is a side view of the same. 22: 24: 30: 32: 34 = 36°'40: Connector reel Reel rotating shaft Gear section 37: Projection reel 23: Transmission cable 25: Signal light 31: Drive motor 33: Pin 35 Cogear 38.39: Detection Sensor and body 2: Frame 3: Drive motor 4: Rotating shaft 5; Wire 5a; One end 5b: Other end 6: Hook 7: Opening 8: Stopping member 9: Pin 10: Engagement protrusion 11: Hook hook is for turning Joint part 12: Rotation lever 13, 14: Position detection protrusion X
5; Detection sensor 20; Hanging beam body 21; Pin j 3z

Claims (1)

[Scope of Claims] 1. A body frame of a hook device, a hook pivotably attached to the body frame on which a sling at one end of the sling to be hung on the hanging object is removably provided, and the other end of the sling. A reel mechanism mounted on the above-mentioned body frame, which has a rotating body that has connected support pins and that winds the suspension rope around the central axis by the revolution of the support pin, and rotates the rotating body of the reel mechanism. a hook for a lifting machine, characterized in that the reel mechanism suspends an object to be hung by the unwound hanging rope while the hanging rope is suspended from the support pin. Device.