JPH0370602B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention involves cutting a sheet-like veneer by cutting a long blade into the outer circumferential surface of the raw material by a predetermined amount while rotating the left and right end faces of the raw material raw material. The present invention relates to a scoring device for determining the width of a veneer to be turned in veneer lace.

As a marking device for veneer lace,
There is No. 15795 (creating device for wood peeling machine).
In other words, the scoring blade guide members A ₁ , A ₂ , A 3 holding the scoring blades 10 are placed on the inclined surface of the pressure platen 1 facing the raw wood ₄ .
. . . is installed, the guide member is appropriately positioned in accordance with a predetermined width of the veneer, and the width is determined by making cuts on the outer circumferential surface of the log in the state of the log before cutting the veneer with the planer blade 3. . The veneer is thinly peeled from raw wood and automatically cut into the required width.

Therefore, the depth of penetration of the creasing blade into the log must be slightly greater than the thickness of the veneer to be peeled.
On the other hand, the actual state of cutting veneers from logs is that the outer circumferential surface of the log is usually uneven and does not produce a connected veneer, so for a while from the beginning of peeling, relatively thick pieces of veneer are peeled (referred to as rough peeling). ) Also, when the log is peeled and reaches a nearly perfect circle, a thin veneer is peeled off (this is called hon-kiri).Furthermore, the weak wood near the heartwood is peeled thickly again (this is called shin-kiri).
The standard method is to cut several types of veneers of different thicknesses from one raw wood, and then simultaneously change the thickness of the veneer and change the creasing dimensions each time.

When cutting a veneer from raw wood as described above, the conventional scoring device had the following defects.

(1) Since the scoring knife makes cuts in the raw wood before it is cut into veneer, the wood powder and wood chips generated at that time advance to the cutting edge and cause the cutting edge to become clogged, reducing the operating rate due to interruptions in work, etc. decreases.

(2) A scoring knife that pierces the outer surface of a log will be shaken by the hardness and softness of the knots and other woody parts, leading to breakage of the cutting edge.

(3) If the creasing knife remains stuck on the outer circumferential surface of the log, and the log is moved in the axial direction by joining the creases together or otherwise moving the log, the creasing knife will immediately break and the outer circumferential surface of the log will also be damaged. Become.

(4) When cutting a thick veneer and then switching to cutting a thin veneer, the creases caused by cutting the thick veneer are deep, and the yield of thin veneer is reduced accordingly.

(5) The scoring device placed on the front of the pressure bar body is exposed to splashes of salt water from raw wood that contains a large amount of moisture and is being rotatably cut at high speed, or is exposed to sudden damage during rotary cutting of raw wood that has many cracks. Because log fragments sometimes collide with each other due to the splintering of logs, it is necessary to construct the device to be robust or to install a protective cover.

The present invention eliminates the above-mentioned defects by using an extremely simple device, and instead of the conventional method of piercing the log with a creasing knife before cutting it into veneers, the width is determined by the creasing knife after cutting the veneer. It is characterized by a scoring device similar to the conventional type installed near the bottom of the pressure bar body.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a veneer lace equipped with the device of the invention. L is a raw wood that is rotated in the direction of arrow A with its left and right end faces held by a spindle (not shown). Reference numeral 11 denotes a planer stand, which has a triangular cross section and has a blade 12 at its upper tip with a length comparable to the length of the raw wood used to cut the veneer.
is held tightly with the cutting edge facing up. Reference numeral 13 denotes a base which is attached to the tip of the plane head over the entire length of the knife 12.

Reference numeral 21 denotes a pressure bar body, which often has a rectangular cross section, and is placed on the planer stand 11 so that it can move forward or backward in the direction of arrow B toward the raw wood L together with the planer stand 11 by means of a feed screw (not shown). Ru.
The amount of advance is configured such that when cutting the veneer, the veneer moves forward by the required thickness of the veneer per one revolution of the raw wood L. A pressure bar 22 is tightly held at the front end of the pressure bar body. The pressure bar comes into contact with the outer circumferential surface of the raw wood near the cutting edge of the knife 12, and regulates the thickness of the veneer to be cut and prepares the peeling surface.

The tip of the knife 12 and the pressure bar 22
A veneer V is produced in the direction of arrow C from the gap with the tip, and this gap is called the cutting edge. 23 is a block member constituting the front surface of the pressure bar body, and is connected to the pressure bar body 21 by a bolt.
It is integrated with. Reference numeral 40 denotes a scoring device, which is installed on a substantially horizontal mounting seat 24 below the pressure bar body 21 at which the pressure bar 22 is attached.
1, and an advancing/retracting mechanism 43 which is screwed into the rear part of the scoring table and moves the scoring blade forward and backward.

The ruler table 41 is disposed on a horizontal or substantially horizontal mounting seat 24 that is bored at a plurality of locations at the bottom of the pressure bar body 21.
It is configured to be slidable in the axial direction of the log along a dovetail groove opened in the width direction (lengthwise direction of the log).
After being positioned according to the predetermined width of the veneer, it is fixed with bolts or the like. The scoring blade 31 is held on the scoring table 41 with its width direction perpendicular.

FIG. 2 shows a detailed view of the scoring blade 31, in which A is a side view and B is a front view as seen from the raw wood side. As shown in the figure, a portion of the upper surface of the rear end of the scoring blade is notched to form a hook portion 31F, while the tip of the blade has an inclined bottom surface that connects from the lower surface toward the cutting edge with respect to the cutting edge 31E that forms a ridgeline. 31B is provided. It is best to configure the inclined bottom surface at an angle so that it makes surface contact with the back surface of the base 13 attached to the plane stand.

Reference numeral 43 denotes a forward and backward movement mechanism, and FIG. 1 shows a screw shaft equipped with a handle. The screw shaft screws into and penetrates the rear part of the scoring table 41, and its tip engages with the hook portion 31F of the scoring blade, and as the screw shaft rotates, the scoring blade 31 moves forward and backward as indicated by the arrow D. It is possible to move approximately horizontally. That is, in FIG. 1, when the handle of the screw shaft constituting the advancing/retracting mechanism is rotated by hand, the scoring blade 31 advances toward the plane stand and the slanted bottom surface 31B of the knife comes into contact with the back side of the base 13 attached to the plane stand and stops. , this completes the setting of the creasing blade.

Therefore, it is best to grind the slanted bottom surface of the scoring blade to an angle that matches the angle formed by the back surface of the base 13. As a simple means, the sloped bottom surface of the scoring blade may be omitted so that the sharp cutting edge directly contacts the back surface of the mouthpiece.

The advancing/retracting mechanism 43 of the scoring device is not limited to the screw shaft advancing and retracting using the female and male screws shown in FIG. There is also a method of engaging by hand. Furthermore, an example in which the marking device 40 is mounted on the mounting seat 24 provided near the lower side of the pressure bar body 21 has been explained using FIG. 1, but the entire marking device is held suspended from the pressure bar body. In some embodiments, the device is hidden by a protective cover so that it does not interfere with the removal of the veneer.

The above-mentioned scoring device 40 is generally disposed mainly at three locations in the width direction of the veneer (the longitudinal direction of the pressure bar body 21), near both left and right ends and near the center.

To explain the embodiment of the present invention having the above-described configuration, when starting wood cutting, both the creasing blades 31 disposed at the left and right ends and the center are advanced for roughly peeled veneer, and the inclined bottom surface 31B of the blade is aligned with the back surface of the base 13. Make contact with and wait. Next, the raw wood L is rotated and the veneer V is cut and discharged from the cutting edge by the veneer cutting blade 12, and the veneer is urged by the driving force of the rotation of the raw wood and passes through the scoring blade 31 to a predetermined size. The two strips of veneer having a determined width slide down in the direction of arrow C while rubbing against the back surface of the planer stand 11, and are then carried out of the machine by a conveyor or the like. Next, when the cross-section of the log reaches a substantially circular shape, the main peeling begins. In this case, the scoring blade, which is usually located in the center, is moved back, and the scoring devices located at the left and right ends are appropriately moved and positioned.
We will resume cutting veneer. In this case wide 1
The veneer of the strips will flow out.

As described above, according to the present device, the following effects can be obtained.

(1) Wood powder and wood chips are generated after the cutting edge of the veneer, so they are carried out together with the veneer, and there are no problems such as clogging of the cutting edge, greatly increasing the operating rate of veneer lace. improves.

(2) Since the creasing blade pierces the thin veneer, there is no danger of it being swung in the thickness direction of the knife, eliminating the risk of tip breakage and extending the life of the creasing blade.

(3) Since the raw wood can be moved in the axial direction regardless of the creasing device, the workability of veneer lace is improved.

(4) Even if the thickness of the cut veneer changes, no scratches from the scoring blade remain, resulting in improved yield.

(5) Since the scoring device is installed at the bottom of the pressure bar body, there is no collision of salt water from rotating logs or crushed logs, making it easy to make the scoring device compact.

As described above, a highly practical marking device has been realized using an extremely simple device.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2A is a detailed side view of the creasing blade, and FIG. 2B is a front view of the creasing blade as seen from the log side. 11... Planer stand, 12... Cutler, 31... Creasing blade, 40... Creasing device.

Claims (1)

[Scope of Claims] 1. In a veneer race for cutting veneer from raw wood, there is provided a plane stand for tightly holding a blade for cutting the veneer with the cutting edge facing upward, and a feed screw having a pressure bar at the tip and disposed above the plane stand. The underside of the pressure bar body is composed of a pressure bar body that moves forward and backward together with the planer stand, a scoring blade that is held by the scoring table and moves back and forth almost horizontally by an advancing and retracting mechanism, and an advancing and retracting mechanism for the scoring blade. A ruling device for veneer lace, characterized in that it consists of a ruling device disposed in the veneer lace. 2. The scoring device for a veneer lace according to claim 1, wherein the advancing/retracting mechanism of the scoring device is constituted by a screw shaft that is threaded into the scoring base. 3. Claim 1, characterized in that the advancing/retracting mechanism of the marking device is constituted by a liquid cylinder.
A creasing device for veneer lace as described in . 4. The scoring device for a veneer lace according to claim 1, wherein the advancing and retracting mechanism of the scoring device is constituted by a combination of a screw shaft that advances and retreats at a slow speed and a liquid cylinder that advances and retreats rapidly.