JP2601298Y2 - Veneer lace chuck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle chuck for holding and rotating a veneer lace for cutting a veneer while rotating a log, by directly abutting the left and right cut edges of the log.

[0002]

2. Description of the Related Art As a device for manufacturing a veneer by cutting a log, a log is rotated by a spindle, and in synchronism with the rotation of the spindle, an advancing / retracting mechanism feeds a plane table on which a knife is arranged. Veneer laces for cutting are widely used. However, in such a conventional veneer race, power supply to the cutting resistance of the log is transmitted through a chuck claw attached to the tip of the spindle, so that a so-called idle rotation occurs, and finally the wooden part is destroyed. It is well known that the transmission of rotational force becomes impossible.

Therefore, in order to drive a log from the outer periphery, a drive roll is provided so as to contact and follow the outer periphery of the log, and as a peripheral drive veneer race for reducing the power supply from a spindle, for example, ( Kosho 61-2180
No. 5), "Rotary race",
There is known a "log drive roll and veneer race" disclosed in Japanese Patent Application Laid-Open No. 3-207601.

Further, in this technique, when the raw wood can be driven alone from the outer periphery, a mechanism capable of slipping or idle rotation is also provided in a drive system of a drive device that rotates a spindle.

[0005]

However, in the known veneer race, power can be supplied from the outer periphery of the log by a drive roll, so that damage to the log by the chuck can be suppressed. . However, if the log is soft, there is little cutting force, so the log tends to over-rotate. On the other hand, the rotation from one of the spindles is replaced with a movement of stopping without following the progress. Since this tends to relatively rotate the log in the reverse direction, at the axis of the log,
A fighting phenomenon has occurred, and the chuck is around the center. That is, the rotation speed of the timber from the rotation V ₁ of the spindle
By degrees V ₂ is relatively early, Chuck and timber
Slip occurs, and the gripping force of the log by the chuck decreases.
Will decrease. Therefore, in pursuit of the cause, the above-mentioned idle rotation is disposed at a position separated from the end face of the log edge of the log, that is, at the drive side via the large and small spindles. This means that a large amount of weight, including chucks and large and small spindles, is
However, it turned out to be a large braking force. did
Therefore it has a problem that the intervention of the large and small spindle is inhibited significantly.

The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a veneer lace chuck capable of improving the yield of a veneer from a log as compared with the related art.

[0007]

In other words, the veneer lace chuck of the present invention is a veneer lace that rotates a raw wood by rotating a spindle that holds and rotates the raw wood, and a driving roller or the like that is in contact with the outer periphery of the raw wood. An idler mechanism provided with an overrun device is engaged with the log-side tip of the small spindle, and a chuck having a claw portion is provided on the log side of the idler mechanism. A means for maintaining the claw portion in a wedge state in the core.

[0008]

The chuck for veneer lace according to the present invention having the above-described structure is characterized in that the difference between the rotation from the spindle system and the rotation from the outer peripheral system of the log is determined by the small left and right spindles and the chuck for wedging the shaft of the log. An idler mechanism provided with a device capable of overrunning is disposed therebetween, and the idler rotates from the outer periphery of the log in response to the rotation from the spindle system. Therefore, the rubbing at the nail portion was eliminated, and the centering around the log was also reduced. Therefore, it is possible to obtain a veneer and improve productivity as compared with the related art.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a double-spindle type veneer race equipped with a chuck according to one embodiment of the present invention. In the drawing, reference numeral 1 denotes a small spindle, and reference numeral 2 denotes a large spindle, which holds a log L and rotates. Both spindles are shown. The small spindle 1 and the large spindle 2
It is rotated by a main motor (not shown). Further, the cylinder 18 is configured to be able to advance in the direction of the log L and retreat in the opposite direction while rotating as shown by the arrow B in the figure by a cylinder 18 which expands and contracts by the fluid pressure of a hydraulic mechanism (not shown). A large chuck 3 for rotating and holding a large-diameter log is screwed into the log-side end of the large spindle 2, and a small spindle 1 is fitted to the inner diameter portion so as to be able to advance and retreat, and an adapter is mounted on the log side. A small chuck 4 for holding and rotating the small-diameter log is fixed to the log side of the adapter 11 via the log 11. On the other hand, reference numeral F denotes a frame which is supported by bearings for rotating the large and small spindle devices.

Next, FIG. 2 shows a main configuration of an embodiment of the present invention. In the figure, reference numeral 1 denotes a small spindle, the tip of which is engaged with a small chuck 4 via an idling mechanism 50, and a plurality of sharp claws 6 are arranged at the tip of the chuck 4. . 2 is a large spindle,
It is rotatably supported by a frame F shown in FIG. 1 via a bearing. Reference numeral 3 denotes a large chuck, and a large spindle 2
And is screwed into the threaded portion 15 at the tip end. Reference numeral 5 denotes a sharp claw portion standing upright on an end face of the log that faces the end face of the log of the large chuck 3, and a plurality of sharp claws are usually planted, and the claw portion 5 securely clamps a log with a large diameter. It is.

Reference numeral 10 denotes a bush fitted on the inner diameter of the distal end of the large spindle 2, which holds the small spindle 1. The small spindle 1 is slidable through the bush 10 in the forward and backward arrow A directions. Reference numeral 17 denotes a dust seal mounted on the tip of the bush, which wipes off dust adhering to the outer peripheral surface of the small spindle 1.

Further, the idling mechanism 50 will be described. The idling mechanism 50 is provided with an adapter 1 provided with a mechanism capable of idling on the screw portion 14 at the inner diameter of the tip of the small spindle 1.
1 is screwed and installed. Meanwhile, its adapter 1
A bearing bearing 7 for holding the shaft portion 19 of the small chuck 4 provided with the sharp claw portion 6 is fitted on the inner diameter of the tip of the raw wood L side. It is fitted together with the bearing 12 via the collar 8, the collar 9 and the liner 20. Therefore, the shaft portion 19 of the small chuck is inserted into the inner diameter defined by the bearing 7, the overrun clutch 8, the liner 20 and the bearing 12 via the collar 9, and is provided in the direction opposite to the claw portion of the chuck 4. A tightening nut 13 is fastened to the threaded portion so as to be able to run idle and not to come off, and is held.

[0014] constructed as described above, veneer lathe chuck of the present invention includes a difference in rotational V ₂ from the outer periphery of the rotating V ₁ and timber from the spindle, the movement to rotate the timber in the reverse direction the quarrel phenomenon occurs rotation, raw wood
That the part that goes around with is limited to only the chuck
Therefore, the weight acting as a braking force can be suppressed.

[0015]

[Effects of the Invention] As described above, according to the veneer lace chuck of the present invention, as compared with the conventional case, the circumference of the raw wood is reduced, thereby improving the yield of the veneer with respect to the raw wood and improving the productivity. Chucks and small spins in existing veneer races with simple modifications.
Since it is possible to replace the handle, it can be replaced with a conventional chuck.
Reducing the diameter of the small spindle leads to an increase
I could do it.

[Brief description of the drawings]

FIG. 1 is a front view of a double spindle type veneer race equipped with a chuck according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a main configuration of an embodiment of the present invention.

FIG. 3 is a view for explaining a main part of an embodiment of the present invention.
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small spindle 2 Large spindle 3 Large chuck 4 Small chuck 5 Claw part 7 Bearing 8 Overrun clutch L Log 50 50 Spindle mechanism

Claims (1)

(57) [Scope of request for utility model registration] A spindle that holds and rotates a log;
In a veneer race in which a driving roller or the like is brought into contact with the outer periphery of the raw wood to cut the raw wood, the rotation of the raw wood that is rotated from the outer circumference of the raw wood relative to the rotation of the spindle in the previous period causes the idle rotation in which the raw wood rotates. A chuck for veneer laces, characterized in that the mechanism is mounted on the tip of the small spindle on the log side , enabling only the chuck and the log to idle .