JPS6010802Y2 - Chuck for rotary race - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of the chuck that is driven into both ends of the log, which is installed at the tip of the spindle in a rotary race that rotates the log and strips the veneer.

The chuck in a rotary race is usually equipped with blades consisting of straight ridges extending radially from the center of rotation, and these ridges are driven into the log from both sides and are supported by spindles on both sides. There is.

In a normal rotary lace, the blades of the chuck are driven into both sides of the log, and the driving force from the spindle is applied to the log through the chuck, rotating the log and peeling the veneer with a knife on a planer stand.

Therefore, stress during cutting of the log is generated within the log between the knife cutting edge and the chuck blade.

The core of lauan wood, which is often used for plywood veneers, is fragile, so the chuck part often breaks the wood part during cutting, and if cracks occur, it may cause damage during cutting. When cracks develop or cutting progresses and the core of the log is approached, the log is often compressed and fractured.

Before charging logs to the rotary race from this wheel shape, work is performed to remove wood chips stuck in the chuck.

However, this work is time-consuming and the rotary lace f
Significantly reduces electric power efficiency.

Also, the work itself is somewhat dangerous.

The purpose of this invention is to provide an improved chuck that automatically removes clogging caused by wood chips in the chuck. The object of the present invention is to provide an improved chuck that reduces breakage of the material and improves yield.

In order to achieve this objective, in this invention, an elastic plate is placed between the protruding blades of the chuck, and when the log is removed from the chuck, this elastic plate contacts the side of the protruding blade and restores its original shape. It is raised to allow wood chips to be removed from the protruding blade.

In addition, in order to reduce cracking of logs, the protruding blades of the chuck are curved instead of straight.

For example, S-shaped or two-shaped blades are arranged intersectingly, or a large number of arc-shaped protruding blades are arranged with the curved inner side facing the rotation direction.

This invention will be explained in more detail with reference to the illustrated embodiments as follows.

FIG. 1 is a front view and a side view of a conventional chuck.

Reference numeral 1 indicates a spindle, and reference numeral 2 indicates a chuck.

As mentioned earlier, when this type of chuck 2 grips and cuts a log, the core of the log collapses, and the proximal side of the blade 3 cutting from the protrusion becomes clogged with wood chips 4. arise.

To avoid this, if you chuck the next log, the blade will not be inserted into the log sufficiently and the core of the log will be damaged when cutting the next log, causing problems such as spinning. In some cases, problems such as increased cracking of the log may occur.

FIG. 2 shows an embodiment of this invention in which a chuck 2 of almost the same type as the conventional chuck is provided with an elastic plate 5.

The elastic board 5 may be a rubber board, a resin foam board, or a plastic board with a hardness of 30 degrees or more, and has a hardness of 50 to 90 degrees.
' is preferred.

The height of the blade 3 is usually 2 to 3 cm, but it is preferably slightly higher so that the elastic plate 5 provided at the base is compressed when the log is gripped with a pressing force of, for example, 1000 kg/Jr. It is better to compensate for the thickness.

If the elastic plate 5 is a rubber plate or the like, it may have a thickness of 1 cm, for example.

By providing such an elastic plate 5, even if the surface of the compressed elastic plate 5 becomes clogged with broken wood chips along the side of the protruding blade 3, when the raw wood is removed from the chuck 2, this When the elastic plate 5 is restored and raised, wood chips 4 are removed from the protruding blade 3
fall off.

In this case, if the cross section of the protruding blade 3 is tapered, its falling off will be more certain.

If the hardness of the elastic board 5 is high, when the raw wood is removed, the protrusion of the elastic board will be small and the wood chips 4 will not fall off sufficiently, and if the hardness is too low, the restoring force will be small and the wood chips 4 will definitely fall off. I can't do it.

Further, the elastic plate may be attached to the chuck 2 using an adhesive or screws.

Incidentally, as shown in FIG. 3, the elastic plate 5 may have a rigid plate 5a such as a metal plate on the surface, and a rubber plate 5b may be inserted under the rigid plate 5a.

Furthermore, as shown in Fig. 4, if the shape of the protruding blade 3' is curved rather than straight as shown in Figs. 2 and 3, cracks that run radially from the center of the log It becomes possible to grasp the object without increasing the size.

Although the curved blade 3' is more likely to be clogged with wood shavings 4 than the straight blade 3, the elastic plate 5 automatically removes the wood shavings 4 each time the charge is released.

[Brief explanation of the drawing]

FIG. 1 shows the front and side views of a conventional chuck.
FIGS. 2 and 3 are embodiments of this invention corresponding to this, and are front and side views in which different elastic plates are attached. FIG. 4 also shows another embodiment of this invention, and similarly shows its front and side views. Symbol explanation, 1: Rotary race spindle, 2: Chuck, 3.3': Chuck blade, 4: Wood chips stuck in blade 3, 5: Elastic plate, 5a: Rigid part of elastic plate, 5b = Elastic plate elastic material part.

Claims (6)

[Scope of utility model registration request] (1) A chuck at the tip of a spindle in a rotary race, in which an elastic plate is provided at least at the peripheral base of the protruding blade that is driven into the center of the side surface of the raw wood, and which is elastically raised in almost contact with the side surface of the protruding blade. A chuck for rotary laces featuring: (2) The chuck for a rotary race according to claim (1), wherein the elastic plate is provided on the entire surface of the chuck except for the protruding blade. (3) The rotary race chuck according to claim 11 or (2), wherein the elastic plate is an elastic material made of rubber, resin, foamed resin, etc. with a hardness of 25 to 90 degrees. (4) The chuck for a rotary race according to any one of claims (1) to (3), wherein the side surface of the protruding blade has a tapered slope in cross section. (5) Claims (1) to (4) for utility model registration in which the elastic plate has a rigid plate such as a metal plate on its surface.
A rotary race chuck as described in any of the above. (6) The rotary according to any one of claims (1) to (5), wherein the protruding blades are not simply arranged linearly in the radial direction, but are curved. Chuck for racing.