JPS5916390Y2 - log clamp device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a log clamping device for a loading vehicle used for loading and transporting timber and the like.

Some conventional log clamp devices have a clamp tip located at the tip of the tine, as shown in FIG.

In this case, as the amount of wear on the tip of the tine increases due to long-term loading operations, the diameter of the wood to be gripped by the clamp at the tip of the tine increases proportionally, and the diameter of the wood to be worked on changes.

Furthermore, it is not possible to load small-diameter lumber for extrusion work using the clamp, which will be described later.Furthermore, some conventional log clamp devices have the clamp tip located further back from the tine tip as shown in FIG.

In this case, when a piece of wood is to be gripped by a clamp at the tip of the tine, as the diameter of the piece of wood to be worked on changes from a large diameter to a small diameter, the trajectory becomes difficult for the clamp holder to bite into, making it impossible to grip the wood.

In addition, it is difficult to extrude small-diameter wood using a clamp, which will be described later.

The present invention was devised to solve the above-mentioned problems of the conventional technology, and it is possible to reliably grasp small-diameter wood at the tip of the tine with a clamp, and to extrude small-diameter wood using a clamp. It is an object of the present invention to provide a new and simple log clamping device.

Hereinafter, the present invention will be explained according to illustrated embodiments.

As shown in FIG. 3, A is a log clamp device, which is composed of a clamp 1, tines 2, a bar 3, a holder 4, and the like.

The clamp 1 and the tines 2 are located approximately on the same center line A when viewed from the front (see Fig. 4), and the vicinity of the proximal end of the clamp 1 is aligned with the vertical portion 2a of the tine 2 so that the tip can be opened and closed. The base end 1a of the clamp 10 is pivotally connected to the upper end by a pin 5.
A rod 7 from which a cylinder 6 retracts is connected by a pin 8.

Further, the piston side 9 of the cylinder 6 is connected to the vicinity of the lower end of the vertical portion 2a of the tine 2 by a pin 10.

A projecting rod 3 extends beyond the side edge of the tine 2 as an offset on the side surface of the tip of the clamp 1, and has a protruding rod 3 at the extended end along a line parallel to the center line A and substantially orthogonal to the tine 2. A holder 4 is provided to protrude in the direction shown in FIG.

The holder 4 has a sharp conical tip so as to bite into wood.

The tine 2 is formed into an L-shape with a vertical portion 2a and a horizontal portion 2b to form a log frame.

The tip 2C of the horizontal portion 2b projects from the tip 1b of the clamp 1 when the tine 2 and the clamp 1 are closed.

In other words, the clamp tip 1b is positioned further away from the tine tip 2C.

This is to improve the durability of the log clamping device A in consideration of the wear of the tip of the tine due to long-term loading operations.

Further, the clamp 1 is formed in a curved shape, and the proximal end 1
a, a tip 1b, and an inner surface 1d of the middle 1C.

Next, the main functions of the log clamp device A configured as described above will be explained.

In the case of loading work where the diameter of the target wood is large or small and does not require grasping, the large diameter wood 11a or the small diameter wood 11b is attached to the horizontal part 2b of the tine 2 as shown in FIG.
The clamp 1 is rotated counterclockwise to close the clamp 1 and fixed by the inner part 1d of the clamp 1.

Next, when a large-diameter piece of wood is to be grasped, the structure of the present invention can be used without any problems, as in the conventional example.

In addition, in the case of gripping a small-diameter piece of wood, as shown in FIG. The locus approaches the tine tip 2C, bites into the small-diameter wood 11b, fixes it, and grips it.

This is possible regardless of the small diameter wood 11b because the holder 4 is provided protruding in a direction substantially perpendicular to the tines 2 with the tines 2 and clamp 1 closed.

This gripping operation is carried out effectively, with little effect even if the tip 2C of the tines 2 is worn out, since the tip 2C is in front of the tip 1b of the clamp 1.

Next, in the case of extrusion work, as shown in Fig. 7, with clamp 1 and tines 2 closed, place small-diameter lumber 11b at the tip 2C of tine 2, load it, and release it to a predetermined location by closing clamp 1. When the holder 4 is rotated clockwise to release it, the trajectory 2 of the holder 4 will be in front of the trajectory of the tip 1b of the clamp 1, thereby making the pushing operation more effective.

As mentioned above, in the present invention, in a log clamp device in which the tines and the clamp are approximately on the same center line,
The log clamp device is constructed by offsetting the side surface of the tip of the clamp with a protruding rod extending beyond the tine side edge, and attaching a holder to the tip of the protruding rod that projects perpendicularly thereto and intersects with the tine. It is also possible to grasp small-diameter wood using the tip of the tine and the clamp, and it is also possible to push out a small-diameter wood from the tip of the tine using a holder, making it possible to expand the working configuration compared to conventional devices.

[Brief explanation of drawings]

1 and 2 are perspective views of the main parts of a conventional log clamp device, FIG. 3 is a perspective view of the main parts of the log clamp device according to the present invention, FIG. 4 is a front view of the same main parts, and FIG. 5 6 is an explanatory diagram of fixing wood in a loading operation that does not require grasping work, FIG. 6 is an explanatory diagram of grasping work of small-diameter timber, and FIG. 7 is an explanatory diagram of extrusion work of small-diameter timber. A...Log clamp device, 1...Clamp, 2...Tine, 3...Protrusion rod, 4
······holder.

Claims (1)

[Scope of utility model registration request] In a log clamp device in which the tines and the clamp are approximately on the same center line, the side surface of the tip of the clamp is offset by a protrusion that extends beyond the side edge of the tine, and the tip of the protrusion is perpendicular to this and intersects with the tine. A log clamp device characterized in that it is configured with a holder that protrudes to do so.