JPH0141753Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an article clamping device used when grasping an article such as a panel and lifting it using a crane or the like.

(Problems to be solved by conventional technology and ideas) For example, at a construction site, when a panel is lifted up and down by a crane, a clamping device is used to grip and tighten the panel. Various proposals have been made in the past.

Needless to say, from a safety standpoint, the primary requirement for this type of clamping device is that it must be highly reliable and able to securely grip the panel to prevent it from falling midway through, but at the same time it must be highly reliable in order to work efficiently. Therefore, it is important to be able to easily and quickly grip a panel with a clamp device, and conversely release a panel that has been gripped.

However, until now, there has been no inexpensive clamping device that fully satisfies the above-mentioned problems.

This invention was proposed in view of the above points,
It is an object of the present invention to provide a simple and inexpensive article clamping device that can easily and quickly grip and release an article to be lifted by simply rotating a handle.

(Means for Solving the Problems) In order to achieve the above object, an article clamping device according to the present invention is an article clamping device for gripping and lifting an article by a pair of clampers, in which connecting portions of the pair of clampers are connected to each other. Once fitted, a rack gear is provided at the connecting part of one clamper,
A pinion is pivotally supported on a bracket provided at a connecting portion of the other clamper and meshed with the rack gear, and an operating handle is attached to the support shaft of the pinion via a ratchet mechanism, and a ratchet wheel forming the ratchet mechanism. is attached to the support shaft of the pinion, and a ratchet pawl is pivotally supported by the bracket, and a pawl that meshes with the ratchet wheel is pivotally supported on the operating handle, and the pawl is supported by a spring. The operating handle is biased in the direction of engagement with the ratchet wheel, and has a ratchet release portion, and the operating handle releases the pawl, the ratchet wheel, and the support shaft by rotating in the tightening direction. rotating the pinion through the clamper to tighten the pair of clampers;
Further, when the operating handle is rotated in a direction opposite to the tightening direction, the ratchet release portion comes into contact with the ratchet pawl, and the ratchet pawl is rotated in the ratchet release direction to release the mesh with the ratchet wheel. It is characterized in that it is made to be

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the present invention, and 1 and 2 are a pair of left and right clampers, each consisting of gripping parts 1a and 2a and connecting parts 1b and 2b.

In this embodiment, a plurality of claws (not shown) are provided on the panel contact surfaces of the gripping parts 1a and 2a of the clamper 1.
is provided, and is configured so that it can bite into the end surface of the wood panel 21 when clamped.

Further, the connecting portion 1b of the clamper 1 is fitted into the connecting portion 2b formed in the hollow of the clamper 2, and is connected so as to be slidable.

A rack gear 3 is attached to the connecting portion 1b of the clamper 1.
A bracket 4 is attached to the end of the connecting portion 2b of the clamper 2, and a pinion 6 that meshes with the rack gear 3 is pivotally supported on the bracket 4 via a support shaft 5.

Reference numeral 7 denotes a ratchet wheel mounted on the support shaft 5, with which a ratchet pawl 8 pivotally supported by the bracket 4 is engaged. A spring 9 is installed between the ratchet pawl 8 and the spring receiver 10, and biases the ratchet pawl 8 in the meshing direction.

Reference numeral 11 denotes an operation handle rotatably mounted on the support shaft 5, and a pawl 1 that engages with the ratchet wheel 7.
2 is pivoted. The pawl 12 is biased in the direction of meshing with the ratchet wheel 7 by a spring 13 installed between it and the spring receiver 14, and has a ratchet release portion on the opposite side that comes into contact with the ratchet pawl 8 to release the ratchet mechanism. 12a is formed.

The clampers 1 and 2 are also integrally provided with levers 15 and 16 for hanging wires, respectively, so that wires 19 and 20 can be hung between them and a hanger bar 18 suspended from a hook 17 of a crane or the like. .

When lifting the wooden panel 21 with the clamp device configured as described above, first, the panel 2
A pair of clampers 1 and 2 gripping parts 1 on both sides of 1
Hook a and 2a, then operate handle 1
1 in the tightening direction (direction of arrow A in Figure 1), the pawl 12 pivotally supported on the handle 11 meshes with the ratchet wheel 7, so that the ratchet wheel 7, support shaft 5, and pinion are rotated. 6 rotate together, and the connecting parts 1b and 2b are drawn together through the rack gear 3, and the claws of the gripping parts 1a and 2a of the pair of clampers 1 and 2 bite into the end surface of the panel 21, and The panel 21 can be tightened and gripped.

After the above-mentioned clamp devices are attached to the front and rear of the panel 21 in this manner, the panel 21 can be lifted by hanging the crane hook 17 on the hanger bar 18.

On the other hand, when releasing the clamp device after lifting, by rotating the operating handle 11 in the direction opposite to the tightening direction (in the direction of the arrow in FIG. 8 and against the spring 9, the ratchet pawl 8
Since the pinion 6 is rotated in the anti-meshing direction, it is disengaged from the ratchet wheel 7 and the pinion 6 becomes free to rotate, so that the pair of clampers 1 and 2
can be removed from the panel 21 by loosening it.

As described above, the clamping device according to this embodiment is highly reliable in that it can securely grip the panel to prevent it from falling, and can grip and release the panel by rotating the operating handle in the forward and reverse directions in the tightening direction. Because it can be done only with
Lifting work becomes easier and work efficiency can be improved.

In addition, since it can be simply constructed by simply connecting a pair of clampers and providing a rack gear, a pinion, a ratchet mechanism, an operating handle, and a ratchet release mechanism between them, it has the advantage of being able to be manufactured at low cost.

It goes without saying that the present invention can be applied not only to clamping devices for wooden panels, but also to clamping devices for panels made of other materials and various articles other than panels.

(Effects of the Invention) Since the present invention is configured as described above, it is possible to grip and release an article only by rotating the operating handle in the forward and reverse directions with respect to the tightening direction.

Therefore, lifting work can be performed easily and quickly, and work efficiency can be improved.

In addition, since it has a simple structure in which only a rack gear, pinion, ratchet mechanism, operating handle, and ratchet release mechanism are provided between the pair of clampers, it can be manufactured at low cost.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a front view of the main parts, Figure 2 being a plan view of Figure 1, and Figure 3 showing the panel in a lifted state. The front view shown in FIG. 4 is a right side view of FIG. 3. 1, 2... Clamper, 1a, 2a... Gripping part, 1b, 2b... Connection part, 3... Rack gear, 4... Bracket, 5... Support shaft, 6... Pinion, 7... Ratchet wheel , 8... Ratchet pawl, 9... Spring, 10... Spring holder, 11...
...Operation handle, 12...Claw, 12a...Ratchet release part, 13...Spring, 14...Spring holder, 1
5, 16... lever, 17... hook, 18...
Hanger bar, 19, 20...Wire, 21...
…panel.

Claims (1)

[Claims for Utility Model Registration] (1) In an article clamping device for gripping and lifting an article with a pair of clampers, the connecting portions of the pair of clampers are fitted together, and a rack gear is provided in the connecting portion of one clamper. , a pinion is pivotally supported on a bracket provided on a connecting portion of the other clamper and meshed with the rack gear, an operating handle is attached to the support shaft of the pinion via a ratchet mechanism, and a ratchet forming the ratchet mechanism. A wheel is attached to the support shaft of the pinion, and a ratchet pawl is pivotally supported by the bracket. A pawl that engages with the ratchet wheel is pivotally supported on the operating handle, and the pawl is driven by a spring. is biased in the direction of engagement with the ratchet wheel through the ratchet wheel, and has a ratchet release portion;
When the operating handle is rotated in the tightening direction, the pinion is rotated via the pawl, the ratchet wheel, and the support shaft to tighten the pair of clampers, and the operating handle is rotated in the tightening direction. When the ratchet is rotated in the opposite direction, the ratchet release portion comes into contact with the ratchet pawl, and the ratchet pawl is rotated in the ratchet release direction to release the mesh with the ratchet wheel. Article clamping device. (2) A utility model registration claim 1, characterized in that a connecting portion of the one clamper provided with the rack gear is fitted into a connecting portion formed in a hollow of the other clamper. article clamping device.