JPS6331922Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a veneer race that turns a wide sheet of veneer veneer while rotating the raw wood. This invention relates to a chuck that is attached to the tips of the left and right spindles of the veneer race and directly clamps the left and right end surfaces of the log when the cutting blade is inserted into the outer circumferential surface of the log by a predetermined amount to peel off a thin, wide veneer veneer. It is something.

In conventional veneer laces, the spindle is usually configured to move forward and backward in the axial direction of the log, in order to determine the length of the log, as well as to load the log and remove the thin diameter and rounded core log after cutting. Screw type, hydraulic type, etc. are used for advancing and retracting these, but there are those that move the left and right spindles forward and backward arbitrarily, and those that move only one side with one side fixed at a predetermined position. A so-called double spindle system is known as a known technique, in which a small spindle that is narrower is built into the inner pocket of the spindle, and the outer large spindle and the small inner spindle are moved forward and backward independently. The logs are actually gripped by the veneer race using sharp claws suitable for securely gripping and rotating the logs at the tips of the left and right spindles of the veneer race facing the log side. The chucks are locked, and the chucks are bitten into the left and right end surfaces of the log with strong pressure, and the log is rotated while the chuck is completely gripped to cut the veneer veneer. The first problem here was how to securely lock the chuck to the tip of the spindle, and various ideas were tried, and the solution was finally found by screwing the two together. . The logs that are then treated with veneer lace come in a variety of materials and sizes, with many having diameters exceeding 2 meters.
In addition, in terms of materials, the number of so-called brittle-core logs, which have a soft center in the diametrical direction, is increasing. The reality is that various sizes such as medium diameter, large diameter, etc. are prepared. Of course, the thicker the spindle diameter, the better in terms of strength, but as the wood is being cut, its final diameter ends at the diameter of the spindle that supports and rotates the wood, so from the perspective of improving yield, it is important to The smaller the diameter, the better, but after considering both of the above aspects, a diameter of around 130mm is commonly used for spindles. Therefore, it is impossible to grip and rotate a log as large as 2m in diameter with a chuck diameter corresponding to a spindle diameter of about 130mm, and even if it rotates, it will rotate around the core when the cutting load is applied. It becomes impossible to cut. Ikioi 130mm
Rotary cutting must be performed using a chuck of approximately 500 mm on a spindle of approximately 500 mm. In addition, even if the log is relatively small in diameter, if the core of the log is rotten or the material is soft, a chuck with a relatively large diameter can be loaded onto the spindle to hold the log and rotate it. I have no choice but to let it happen. These various miscellaneous logs must be randomly brought to the veneer lace and mechanically processed. This brought up the second problem.Currently, chucks of various sizes are prepared near the spindle of the veneer lace, and the chucks are replaced at large intervals depending on the log. Also, as an example, when I tried to rotate the log with the intention of cutting with a medium-diameter chuck, in reality, the center of the log turned around, and I had to remove the gripped log and carry out cutting with a large-diameter chuck. restarting, etc.
This forced a significant drop in the operating rate of veneer lace. The present invention solves the above-mentioned bottlenecks at once, and will be explained below with reference to the drawings.

FIG. 1 is a side sectional view of the tip of a spindle of a double spindle type with veneer lace, with a part of the small spindle being omitted in cross section. Reference numeral 1 denotes a small spindle, and a plurality of sharp claws 13 are disposed at the tip of the chuck 2, into which a small spindle chuck 2 is screwed or tapered. 3 is a center that is screwed into the axial center of the chuck 2, and serves as a guide for aligning the axial center when joining with the raw wood. 10 is the large spindle, which is the frame F of the veneer lace VL in Fig. 6.
is supported via a bearing. Reference numeral 11 denotes a base chuck, which is screwed onto a threaded portion 12 at the tip of the large spindle 10. Reference numeral 13 denotes a sharp claw portion provided upright on the log side end surface 14 facing the left and right end surfaces of the log of the base chuck 11;
Usually, a plurality of them are planted, and the logs are reliably held by the claws. Reference numeral 15 denotes a bush fitted to the inner diameter of the tip of the large spindle, and this part holds the small spindle 1 in the inner pocket, and the small spindle 1 can be slid forward and backward in the direction of arrow B through the bush. It's summery. Reference numeral 16 denotes a dust seal loaded at the tip of the bush for wiping away dust adhering to the outer peripheral surface of the small spindle. Reference numeral 17 denotes an engagement groove which is a characteristic part of the chuck according to the present invention, and is formed on the outer peripheral surface of the base chuck 11 at the same depth from the side end surface 14 in the axial direction of the spindle, as shown by solid lines and dotted lines in FIG. A groove is bored in the chuck 11, and the chuck 11 is further opened in the circumferential direction opposite to the direction of rotation of the spindle along the outer circumferential surface of the chuck 11, and the groove is stopped as shown in FIG. The holes are drilled in a substantially inverted L shape, and the circumference of each base chuck is usually divided into equal parts, and the holes are preferably drilled at a plurality of locations, for example, two to four locations. Note that the engagement groove 17 is located on the left side of the spindle.
Depending on the right side, it is composed of a chuck having an inverted L-shaped groove and an L-shaped groove, respectively. Note that FIG. 2 shows the small spindle 1 removed, and FIG. 3 partially shows the view in the direction of arrow A in FIG. 2. 18 is a stepped portion provided on the outer peripheral surface of the base chuck, and 19 is the outer peripheral surface of the tip. 4 and 5 illustrate the chuck loaded into the base chuck 11 shown in FIGS. 1, 2, and 3. FIG. 4 is a side sectional view, and FIG. 5 is a front view. In the figure, reference numeral 21 denotes a stacked chuck, and its inscribed surface 22 has a diameter that fits loosely into the outer circumferential surface 19 of the tip end of the base chuck 11.
It is inscribed in 9. Reference numeral 23 denotes an insertion hole for attaching the protruding member 25, and the distance H' from the raw wood side cross section 24 of the overlapping chuck 21 to the center of the protruding member 25 is the distance H' from the side end surface 14 of the base chuck to the center of the engagement groove shown in FIG. The base chuck 11 is arranged at the same dimension as the distance H of the base chuck 11.
The same number of engaging grooves 17 as the plurality of engaging grooves 17 bored in the outer peripheral surface of the engaging grooves are installed by equally dividing the circumference. Reference numeral 25 denotes a protruding member, which matches the two-stage thickness of the insertion hole 23, and furthermore, the protruding member inserted into the hole from the inner diameter side of the chuck 21 (inscribed surface with the base chuck) completely protrudes when inserted. The tip of the member protrudes toward the axis of the overlapping chuck 21 and is exposed by the depth of the engaging groove 17 of the base chuck 11. Further, the thickness of the exposed portion of the protrusion member is configured to be the same as the width dimension of the engagement groove of the base chuck 11. Reference numeral 26 denotes a set hole for fixing the protruding member 25 to the main body of the overlapping chuck 21, and is tightly secured using a commercially available set screw or the like. Note that the inner diameter of the stacked chuck 21 is the same as that of the base chuck 1.
Except for the regulation that the outer diameter of the front side of the stepped portion 18 and the width in the spindle axis direction are made uniform, various outer diameters are arbitrarily prepared. Therefore, as the outer diameter of the overlapping chuck increases, the length of the protruding member 25 (the portion that is fitted into the overlapping chuck main body) may be increased. Reference numeral 13' denotes a plurality of claws that pierce the end face of the raw wood and securely clamp the raw wood, and a plurality of claws are provided upright on the end face 24 on the raw wood side.

Next, as shown in FIG.
is formed into a ring shape, and a notch 22C is provided in a part thereof, and the dimension of the notch is such that it easily passes through the outer diameter dimension of the small spindle 1 shown in FIG. It is sized to allow for.

In the embodiment with the above configuration, the overlapping chuck 21 having the optimum outer diameter depending on the diameter of the raw wood hanging on the veneer lace or the state of the shaft center, etc. is taken from the tip side of the claw part of the base chuck 11.
Align each protruding member 25 with the engagement groove 17, insert it, and at the dead end, rotate the chuck a little into the L-shaped part of the engagement groove opened in the opposite direction to the rotation direction of the left and right spindles. Installation can be completed with an extremely simple operation of just letting the

On the other hand, when removing it, it is now possible to attach and detach it very easily by performing the exact opposite operation to that used when attaching it.

In addition, if the chuck that has been selected and loaded based on the condition of the log is judged to be unable to cut due to the core area, etc., the log is supported by the small spindle 1 as shown in Figure 6. Then, the large spindle 10 is moved back in the direction of arrow B', and a large-diameter overlapping chuck is selected and the small spindle is passed through the chuck's notch to be replaced. The large-diameter chuck, which has been moved forward and replaced, makes it possible to reliably grip and rotate logs, eliminating the hassle of attaching and removing conventional logs from the spindle, and preventing the logs from loosening and falling off during cutting and rotation. This is an extremely effective idea for improving the operating rate of veneer lace.
The L-shaped or inverted L-shaped engagement groove can also be a groove formed diagonally in a straight line on the outer peripheral surface of the base chuck.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the tip of the double spindle, FIG. 2 is a front view of the base chuck, FIG. 3 is a partial view taken along arrow A in FIG. 2, and FIG. 4 is a side sectional view of the overlapping chuck. Figure 5 is a front view of the stacked chuck alone. FIG. 6 is a front view of a double spindle type veneer lace equipped with a chuck. DESCRIPTION OF SYMBOLS 1...Small spindle, 2...Chuck for small spindle, 10...Large spindle, 11...Base chuck, 13...Claw portion, 14, 24...Side end surface of chuck, 15...Bushy, 17...Register Matching groove, 18...Step part, 19...Tip outer peripheral surface, 2
1... Overlap chuck, 22... Inner diameter part, 22C...
...Notch, 23...Insertion hole, 25...Protruding member, 26...Set hole, F...Frame, VL...
...veneer lace.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a veneer race that is equipped with a double spindle and cuts a veneer while rotating the raw wood, the end face of the raw wood has claws that hold the raw wood upright, and the holes are drilled from the end face to the outer peripheral surface. The base chuck has a plurality of engagement grooves and is engaged with the tip of the large spindle, and an inscribed surface that loosely fits into the outer peripheral surface of the base chuck, and has a plurality of protrusions that fit into the engagement grooves of the base chuck. A ring-shaped overlapping chuck is provided on the surface of the chuck, and a claw portion for clamping the raw wood is placed upright on the end surface of the log side.A notch slightly wider than the outside diameter of the small spindle is provided on the ring-shaped overlapping chuck, which allows the overlapping chuck to be attached to and removed from the base chuck. Features a chuck for veneer lace. 2. The chuck for veneer lace according to claim 1, wherein the engaging groove of the base chuck is formed in an L-shape or an inverted L-shape. 3 Utility model registration claim 1, characterized in that the protruding member of the stacked chuck is removably installed
A chuck for veneer lace according to item 1 or 2. 4. The utility model according to any one of claims 1 to 3, characterized in that the engagement groove of the base chuck and the protruding member of the overlapping chuck are provided at two to four locations in the circumferential direction. Chuck for veneer lace.