JP2843974B2 - Lifting hook device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting hook device which is attached to the tip of a wire of a crane or the like and is suitable for lifting H-shaped steel or the like.

[0002]

2. Description of the Related Art Generally, a crane is used at a construction site or the like by a crane.
When lifting the section steel, attach two holding type hooks to the tip of the wire of the crane, hold the upper side (web) of both sides of the H section steel with the two holding type hooks, and lift the H section steel in a substantially horizontal state. ing.

[0003]

However, when the H-shaped steel is lifted by using two conventional holding-type hooks, the two holding-type hooks move independently of each other. The H-shaped steel tends to become unstable due to the movement of the holding state, and if the holding state is insufficient, the H-shaped steel may come off from the hook.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in consideration of the above, and is capable of stably and reliably gripping an object to be hung such as an H-shaped steel and allowing a hook to be easily attached and detached. It is an object to provide a hook device.

[0005]

In order to achieve the above object, a lifting hook device according to the present invention comprises a horizontally elongated main body frame, hook portions attached to both left and right ends of the main body frame, and a main body frame. A leg vertically and vertically slidably and rotatable within a certain range at the center of the
The left and right hook portions each have a hook body provided with a fixed jaw portion and a movable jaw portion pivotally supported on the hook body so as to bite on both sides of the suspended object from a relative direction. At the end of the movable jaw on both side hooks, a suspension ring to which a hanging wire is connected is attached, and in the center of the body frame, when the weight of the body frame is applied to the legs, the hook and A rotation mechanism for rotating the main body frame in a direction of disengaging from the suspended object is provided.

Here, the rotating mechanism is such that a leg is inserted into a pipe provided in the center of the main body frame, a guide hole is provided in a part of the pipe at an angle, and a pin engaged with the guide hole is provided. Can protrude from the legs.

[0007]

[Operation / Effect] In the lifting hook device having such a structure, when the object to be hung is held and lifted, its legs are placed on the object to be hung, and the weight of the main body frame and the left and right hooks is reduced. To the legs. At this time, the main frame and the left and right hook portions are rotated and stopped in a direction in which the hook portion is disengaged from the suspended object by the action of the rotating mechanism. It is located slightly away on both sides of the object.

Next, when the lifting wire connected to the ends of the movable jaws of both hooks is slightly lifted, the body frame rises with respect to the legs. Of the left and right hooks, the movable jaw,
Enter the suspended object from both sides.

Further, when the lifting wire is lifted, the movable jaws of the hooks on both sides rotate to act so as to bite the object to be lifted from both sides with the fixed jaw.
In this state, the object to be suspended is lifted with the rise of the wire.

When the lifted object is lowered to a predetermined position, the lifting load by the wire is released.
The movable jaw of the hook rotates in the direction to release the bite due to its own weight, and the weight of the main frame and the left and right hooks is applied to the legs. Receiving power in the direction to disengage the hook, the left and right hooks rotate and stop in the direction away from the suspended object, and the engagement of the hook with the suspended object is completely released. .

As described above, when the object to be suspended is lifted, the hook portions on both sides are separately provided so that the object to be suspended is sandwiched and lifted so as to automatically bite from both sides of the object to be suspended. The object to be suspended can be pinched and lifted by a simple operation as compared with the case where the object to be suspended is lifted using the two hooks provided. Also, when the suspended object is lowered to a predetermined position, the hook portion is automatically disengaged simply by releasing the lifting load of the wire, and the main body frame and the hook portion are rotated to be in contact with the suspended object. Since the hooks are completely disengaged, these operations can be performed very easily and with little manual work.

[0012]

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

FIG. 1 is a front view of the lifting hook device, FIG. 2 is a plan view thereof, and FIG. 3 is a left side view thereof. In this lifting hook device, hook portions 2 and 3 are attached to both side ends of a horizontally long main body frame 1,
At the center of the main body frame 1, a rod-shaped leg 4 is vertically mounted so as to be rotatable within a predetermined angle range.

The hook portions 2 and 3 on both sides are formed in the same shape as described later, and are attached in a facing manner so as to bite and hold an H-shaped steel web as a suspended object from both sides thereof. As shown in FIG. 2, the hooks 2 and 3 have their tips inwardly with respect to the main body frame 1 so as to bite the H-shaped steel web at right angles from both sides.
Just tilted and fixed.

At the center of the main body frame 1, a pipe 5
Is fixed, and a leg 4 of a round bar is inserted into the pipe 5 and a foot 6 having an elastic member fixed to the lower surface of the lower end of the leg 4.
Is fixed. The foot 6 of the leg 4 is placed on the web when lifting the H-section steel.

A long hole-like guide hole 5a is formed on a part of the outer periphery of the pipe 5 so as to be obliquely inclined on both sides, and a pin 4a is formed at a position corresponding to the leg 4 in a direction perpendicular to the axis. The pin 4a is inserted into the guide hole 5a to form a rotating mechanism of the main body frame 1. This guide hole 5a is
The body frame 1, that is, the central pipe 5
When is lowered, a rotational force is applied to the main body frame 1 to rotate the main body frame 1 in a direction in which the hook portions 2 and 3 on both sides are disengaged.

The hook 2 is provided inside the hook body 20.
The movable jaw 21 is rotatably supported. The hook main body 20 is formed by welding two rectangular steel plates with a space therebetween, overlapping and welding, and forming a fixed jaw 22 by notching a part of the front part in a concave shape.

The movable jaw 21 is formed by providing teeth at the lower part of the tip of a substantially triangular steel plate, and the teeth can be opposed to the fixed jaw 22 and can be rotated by a pin 23 within a certain angle range. Be pivoted. A suspension ring 24 is rotatably connected to the end of the movable jaw 21, and a lifting wire W is connected to the suspension ring 24. Reference numeral 25 denotes a stopper fixed to the side of the movable jaw 21, as shown in FIG. 3, abutting on the edge of the hook body 20 when the hook is not suspended to rotate the movable jaw 21 backward. Restrict.

Similarly to the above, the hook body 3 has a hook body 3
The movable jaw 31 is rotatably supported in the inside of the housing 0. The hook main body 30 is configured by welding two rectangular steel plates with a space therebetween, overlapping and welding, and partially forming a concave jaw to form a fixed jaw 32. The movable jaw 31 is formed by providing teeth at the lower end of a substantially triangular steel plate, and the teeth are pivotally supported by pins 33 so as to be able to face the fixed jaw 32 and to be rotatable within a certain angle range. You. A suspension ring 34 is rotatably connected to the end of the movable jaw 31.
4, a lifting wire W is connected.

Since the movable jaws 21, 31 of the hooks 2, 3 are pivotally supported by pins 23, 33, the lifting wires W connected to the suspension rings 24, 34 located at the ends thereof. When lifted, the lifting force is
It acts as a force for rotating the teeth 1 and 31 downward, that is, a biting force.

The lifting hook device constructed as described above is connected to the tip of a wire of a crane or the like via two wires W connected to the suspension rings 24 and 34, and the H-shaped steel S
Used for lifting work.

First, the hook device is placed on the H-shaped steel S to be lifted, with its longitudinal direction aligned. At this time, the foot 6 at the lower end of the leg 4 of the hook device is placed on the web of the H-shaped steel S, and the main body frame 1 and the left and right hooks 2,
Since the weight of the pipe 3 is applied to the pipe 5, the main frame 1 and the left and right hooks 2 and 3 are slightly rotated in the direction of the arrow in FIG. 6 and stopped by the engagement of the guide hole 5a and the pin 4a. For this reason, as shown in FIG.
At a distance away from both sides of the section steel S, it comes to rest.

Next, when the wire W is slightly lifted, the leg 4
Since the pipe 5 of the main body frame 1 rises, the main body frame 1 and the left and right hook portions 2 and 3 receive the power in the direction of the arrow in FIG. Move, the fixed jaws 22 of the left and right hooks 2 and 3,
32 enters the web of H-section steel S from both sides.

Further, when the wire W is further lifted, as shown in FIG.
Pins 23, 33 so that 1, 31 pushes down their teeth.
, The web of the H-shaped steel S is fixed to the fixed jaws 22 and 3.
The H-shaped steel S is lifted with the wire W rising in this state.

As described above, when the object to be hung is lifted, the hooks 2 and 3 on both sides of the H-shaped steel S are automatically pinched from the both sides of the H-shaped steel S at the same time so that the object to be hung is lifted. The object to be suspended can be nipped and lifted by a simple operation as compared with the case where the object to be suspended is lifted using the two hooks provided in the above.

When the H-shaped steel S suspended at a predetermined position is lowered, the wire W is lowered to lower the H-shaped steel S at that position.
The movable jaws 21, 31 of the hooks 2, 3 rotate in the direction of releasing the bite due to their own weight, and the weight of the main body frame 1 and the left and right hooks 2, 3 is applied to the pipe 5. Due to the engagement of the pin 5a and the pin 4a, the main body frame 1 and the left and right hook portions 2, 3 receive turning power in the direction of the arrow in FIG. 6, and the left and right hook portions 2, 3 rotate in the direction away from the H-shaped steel S. Then, the engagement of the hook with the H-section steel S is completely released.

As described above, the suspended object is lowered to a predetermined position,
Only by releasing the lifting load of the wire W, the hooks 2 and 3 are automatically disengaged, and the main body frame 1 and the hooks 2 and 3 rotate to completely engage the object to be suspended and the hook. Since they are released, these operations can be performed very easily and with little use of manpower.

[Brief description of the drawings]

FIG. 1 is a front view of a lifting hook device according to an embodiment of the present invention.

FIG. 2 is a plan view of the hook device.

FIG. 3 is a left side view of the hook device.

FIG. 4 is a perspective view showing a lifting operation.

FIG. 5 is a perspective view showing a lifting operation.

FIG. 6 is a perspective view when a hook is disengaged.

[Explanation of symbols]

1-body frame, 2,3-hook, 4-leg, 4a
-Pin, 5a-guide hole, 20, 30-hook body, 2
1, 31-movable jaw, 22, 32-fixed jaw, 23, 3
3-pin, 24, 34-suspension ring.

Claims (2)

(57) [Claims] 1. A main body frame formed in a horizontally long shape, hook portions attached to both right and left ends of the main body frame, and a vertically movable and vertically slidable and rotatable center of the main body frame. The left and right hooks each have a hook body provided with a fixed jaw and a movable jaw pivotally supported on the hook body so as to be swingable. A suspending ring is attached to both sides of the object so as to bite from a relative direction, and a suspending ring to which a suspending wire is connected is attached to a distal end of the movable jaw of the hook on both sides. A lifting hook device characterized in that a lifting mechanism is provided for rotating the main body frame in a direction in which the hook portion disengages from the suspended object when the weight of the main body frame is applied. . 2. The rotating mechanism according to claim 1, wherein the leg portion is inserted into a pipe provided in the center of the main body frame, a guide hole is provided in a part of the pipe, and a guide hole is provided. 2. The lifting hook device according to claim 1, wherein a pin to be fitted is formed by projecting from the leg.