JPH0370605B2 - - 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 method and 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, it is necessary to insert the creasing blade into the raw wood at a depth 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 it is difficult to produce a connected veneer from the beginning. ) 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 in the log for a long time, and the log is moved in the axial direction by aligning the creases or otherwise, the creasing knife will break immediately and the outer circumferential surface of the log will also be damaged. .

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

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

(6) Creasing cutlery cuts into rigid logs and determines the width by pushing and cutting, so the blade does not last long and needs to be sharpened frequently, and the lifespan of the cutter is short.

The present invention eliminates the above-mentioned defects.In contrast to the conventional method of piercing the raw wood with a creasing knife before cutting it into veneers, the cutter of the creasing device installed near the back of the planer stand cuts the raw timber. A first method invention for cutting a veneer to determine its width immediately after cutting, a second invention characterized in that a cutter of a scoring device is arranged so as to be movable forward and backward near the back of a planer stand by a forward and backward mechanism, and a third invention.
The invention is characterized in that a cutter of a scoring device is disposed near the back of the plane stand, and an anvil roll that can be moved forward and backward by an advance and retreat mechanism is disposed near the bottom of the pressure bar body.

An embodiment of the present invention will be described below with reference to the drawings.
1 and 2 are side views 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 holds at its upper tip a knife 12 having a length comparable to the length of the log from which the veneer is to be cut, with the cutting edge facing upward. 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 log L together with the planer stand 11 by means of a feed screw (not shown). be done.
The amount of advance is configured such that when cutting a veneer, the veneer moves forward by the required thickness of the veneer per one rotation 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. Reference numeral 23 denotes a block member constituting the front surface of the pressure bar body, and is integrated with the pressure bar body 21 by bolts.

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.

First, the first and second inventions will be explained with reference to FIG. 40 is a cutter 31 or 31' for cutting the veneer to determine the width after cutting with a scoring device;
It consists of an advancing/retracting mechanism 43 for advancing and retracting the cutter from the back surface 11B of the planer stand, and is hidden inside a plurality of spaces drilled in the back surface of the planer stand 11, and on the back side of the back surface of the planer stand. Reference numeral 43B is a base shaft bracket that is attached to the back surface of the back surface 11B of the planer stand, etc., and pivotally supports the cylinder end of the fluid cylinder 43C of the advancing/retracting mechanism 43 via the base shaft 43S. Reference numeral 42B denotes a fulcrum bracket, which is disposed above the base bracket 43B, and supports the left and right ends of the fulcrum shaft 42S, which is supported over the movement range of the creasing device (the veneer width is determined by moving in the axial direction of the log). is rotatably supported.

A relatively short swing lever 42 is attached to the fulcrum shaft 42S,
One end of each of the relatively long holding members 41 is fixed to the shaft, and the other end of the swing lever 42 is fixed to the tip of the piston rod of the fluid cylinder 43C which is disposed upright from the base shaft bracket 43B. , and a cutter 3 at the other end of the holding member 41.
The first class is supported by a shaft. Therefore, the fulcrum shaft 42S rotates due to the vertical movement of the fluid cylinder, and the holding member 41 locked to the shaft swings in the direction of arrow D, and the cutter 31 locked to the tip of the holding member also rotates. 31' moves forward and backward from the back surface 11B of the plane stand.

Note that the base bracket 43B and the fluid cylinder 43
C and the base shaft 43S, instead of using a fluid cylinder, the cutter 31 and the like may be configured to be able to move forward and backward from the back of the planer stand using, for example, a combination of a cam and a link mechanism, or a combination of female and male threaded shafts.

On the other hand, the lower surface 21B of the pressure bar body 21
In order to serve as a receiving blade for the cutter 31, the cutter 31 has a flat lower surface, and a required number of narrow slits corresponding to the blade thickness of the cutter are bored in the lower surface to an appropriate depth. Still other examples include:
There is also a method of burying a wooden block or a relatively soft aluminum alloy block in the lower surface of the cutter at a position corresponding to the cutter, and directly opening a groove in the block using the cutter that is advanced and raised.

3 and 4 are detailed views of various cutters 31 and 31' commonly adopted in each invention, respectively.
The figure shows a side view, and B shows a front view. Figure 3 shows a rotary cutter with a sharp circular cutting edge 31P.
It consists of a boss 31B surrounding the blade, and is often shaped like a disk like a pipe cutter. Steel such as high-speed steel is used for the cutter, heat treated, and fixed to the holding member 41 vertically and rotatably.

FIG. 4 shows a fixed cutter 31' in the shape of a knife, which has a sharp cutting edge 31'P at its distal end, and is secured to a holding member 41 along with the member.
A fixed cutter can have a long life by repeatedly polishing its cutting edge.

In addition, the rotary cutter is a cutter that can freely rotate,
In addition to the illustrated embodiment, there is also a configuration in which a disk cutter with a serrated edge is used to make dotted or chain line cuts in a veneer, and a circular saw cutter is rotationally driven. There is also.

As described above, the scoring device 40 shown in FIG. Generally, they are deployed intensively.

To explain the embodiment of the present invention having the above configuration, first, cutters recessed from the back surface 11B of the planer stand at the left and right ends and the cutters arranged at the center are positioned for rough peeling veneer. Next, at the start of cutting the log, the cutter moves forward from the back surface 11B of the planer stand by activation of the advancing/retracting mechanism 43 and waits just before the cutting edge contacts the lower surface 21 of the pressure bar body. If a slit or the like is formed in the lower surface 21B, the cutting edge is set so that it is slightly buried in the groove. The raw wood L rotates in the direction of arrow A, and the veneer V is cut by the cutter 12 and is urged by the propulsive force of the rotation of the raw wood, and is forcefully discharged from the cutting edge and passes through the cutter 31 or 31'.

The rotary cutter 31 rotates while winding the veneer between it and the pressure bar body lower surface 21B,
Further, the fixed cutter 31' passes through the gap between the cutting edge and the body back surface 21B while the veneer scrapes,
In both cases, three strips of width are cut. The veneer continues to move in the direction of arrow C while being rubbed on the back surface of the planer stand, and is carried out of the machine by the next stage device.

When the raw wood is cut and reaches a perfect circle state, the main peeling process begins, but in this case, there is usually no need to cut the width at the center, and the advance/retreat mechanism 43 lowers and embeds the cutter in that area from the back side of the planer stand 11B and cuts the left and right ends. Two cuts are made on the veneer using only the scoring device. Furthermore, when transitioning to core stripping, three strips are cut to determine the width in the same way as the initial rough stripping.

Next, the third invention will be explained with reference to FIG. In FIG. 2, except for the marking device 40', the other configurations are the same as those in FIG. 1, so the explanation will be omitted. Reference numeral 31 denotes a rotary cutter, which is rotatably attached to a shaft mounted in a space 31S drilled in the back surface 11B of the planer stand over the range of movement of the scoring device. Planer stand back 11
It is placed so as to protrude from B. In the case of the solid type cutter 31', it may be fixed with a bolt to a sheath-shaped holding member (not shown) similarly arranged in the space 31S, and installed with the cutting edge protruding from the back surface 11B of the plane stand.

Reference numeral 60 denotes a forward and backward movement mechanism, which includes a holding member 52 and a swinging lever 6.
1. Mounting bracket 62B, fluid cylinder 6
2C, a base shaft 63, a base shaft bracket 63B, etc., and is installed inside the pressure bar body 21 in a concealed state. The mounting bracket 62B pivotally supports the end of the fluid cylinder 62C and is locked to the inner wall of the pressure bar body 21.
3B is disposed in the vicinity of the lower surface 21B of the pressure bar body, with the base shaft 63 being pivotally supported. And the base axis 63
One end of each of a relatively short swinging lever 61 and a relatively long holding member 52 is fixed to the shaft, and the other end of the swinging lever is attached to the tip of a piston rod of a fluid cylinder 62C suspended by the mounting bracket 62B. is locked, and the other end of the holding member 52 has an anvil roll 5 whose outer peripheral surface is coated with an elastic material such as rubber.
1 is rotatably supported.

Therefore, the base shaft 63 rotates due to the vertical movement of the fluid cylinder 62C, and the anvil roll 51 moves forward and backward from the lower surface 21B of the pressure bar body in the direction of arrow D through the holding member 52 that is locked to the shaft. become. Further, the outer peripheral surface of the advanced anvil roll comes into contact with the cutting edge of the cutter 31 or 31' placed near the back of the planer stand, and the anvil roll is set so that the cutting edge slightly bites into it. It is preferable that the anvil roll has a roll width that can cover the movement range of each scoring device, and the embodiment in which it is driven in the veneer conveyance direction improves the veneer conveyance effect.

Moreover, although the advance/retreat mechanism 60 has been described in detail as an example employing a fluid cylinder, there are also examples in which it is constructed by a combination of a cam and a link mechanism, or a combination of female and male threads.

As described above, the cutter 31 or 31' is disposed near the back of the plane stand with its cutting edge visible, the anvil roll 51 is configured to move forward and backward from near the bottom of the pressure bar body, and the scoring device 40 is operated by the forward and backward mechanism 60 for the roll. ′ is constructed. The scoring device 40' is similar to the scoring device 40 in FIG.
Generally, they are placed in three locations in the width direction of the paper: near both left and right ends and near the center.

To explain the embodiment of the present invention having the above configuration, first, the anvil roll 51 is raised and waits to be buried in the pressure bar body 21 by the advancing/retracting mechanism 60. Next, the cutters placed at the left and right ends and the center of the scoring device 40' are positioned for rough peeling of the veneer. Next, at the start of log cutting, the three anvil rolls are advanced from the lower surface 21B of the pressure bar body by activation of the advancing/retracting mechanism 60, and the cutting edge is set in a slightly biting state.

On the other hand, the log L rotates in the direction of arrow A, and the veneer V is cut by the cutter 12. Immediately after cutting, the veneer is urged by the propulsive force of the rotation of the log and is forcefully discharged from the cutting edge, between the cutter and the anvil roll. As the rolls rotate, the paper passes through the paper while being sandwiched between them and being cut at predetermined intervals by the rotation of the rolls. The anvil roll is rotated freely or driven to transfer the veneer in the direction of arrow C, and as a result, the veneer is cut into three strips to determine its width.

Next, in the case of main peeling, the anvil roll placed in the center is raised and retreated in the same manner as in the embodiment in FIG. However, the weight of the relatively thin veneer, which is around 1 mm at most, has only a slight effect and will not cause cuts in the area. Therefore, at the time of actual stripping, only the cutters at the left and right ends are used to determine the width.
In addition, the width-determining cutting for core peeling is performed in the same way as for rough-peeling, in which three strips are determined for width.

Note that the pressure bar body 21 does not necessarily have a rectangular cross section depending on the type of veneer lace, and therefore some models do not have the pressure bar body lower surface 21 formed. Therefore, a member having a function as a substitute for the lower surface 21B is provided at an unusual position.

According to the present invention described in detail above, 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 swinging in the thickness direction of the knife, eliminating breakage of the cutting edge 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.

(6) The rotary cutter cuts the width of the veneer while rotating, so the veneer can be transferred smoothly, and there is no adverse effect on the next process due to bending of the veneer.

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

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which FIGS. 1 and 2 are side views of a veneer lace equipped with a scoring device, and FIGS. 3 and 4 are detailed views of a cutter. 11... Planer stand, 31, 31'... Cutter, 4
0,40'...Rule drawing device, 41,52...Holding member, 43,60...Advance/retreat mechanism, 51...Anvil roll, L...Log, V...Veneer board.

Claims (1)

[Scope of Claims] 1. In veneer lace for cutting veneer from raw wood, the veneer cut by a veneer cutting blade installed on a planer stand is cut by a cutter of a scoring device installed near the back of the planer stand. , A method for marking veneer veneer in veneer lace, which is characterized by cutting to the width immediately after cutting from raw wood. 2. The method for marking a veneer in a veneer lace according to claim 1, wherein the veneer cut from raw wood is cut to determine its width by a freely rotating cutter. 3. The method for marking a veneer in a veneer lace according to claim 1, wherein the veneer cut from raw wood is cut to determine its width by a rotationally driven cutter. 4. In a veneer race for cutting veneer from raw wood, there is a plane stand that tightly holds the blade for cutting the veneer with the cutting edge facing upward, and a pressure bar at the tip, which is placed above the plane stand and is moved back and forth integrally with the plane stand by a feed screw. A veneer comprising a pressure bar body that moves forward, a cutter that is locked to a holding member and configured to be able to move forward and backward from the back of the planer stand, and a creasing device that includes a mechanism for advancing and retracting the cutter that is installed inside the planer stand. A veneer marking device for lace. 5. Claim 4, characterized in that the cutter is constituted by a rotary cutter that can rotate freely.
A veneer scoring device for veneer lace as described in Section 1. 6. The device for marking a veneer veneer in a veneer lace according to claim 4, wherein the cutter is a rotary cutter that is rotationally driven. 6 In a veneer race for cutting veneer from raw wood, there is a plane stand that tightly holds the blade for cutting the veneer with the cutting edge facing upward, and a pressure bar at the tip, which is placed above the plane stand and is moved forward and backward integrally with the plane stand by a feed screw. The presser bar body moves forward, the cutter is placed on the planer stand with its cutting edge protruding from the back of the planer stand, and the anvil roll and press are rotatably supported by a holding member and are movably arranged near the bottom of the presser bar body. A veneer lace creasing device for veneer lace, characterized in that it is equipped with a creasing device consisting of an advancing and retreating mechanism for an anvil roll built into a Yarbor body. 7. The veneer lace scoring device for veneer lace according to claim 6, wherein the anvil roll is configured to freely rotate. 8. The veneer lace marking device for veneer lace according to claim 6, wherein the anvil roll is rotationally driven. 9. A veneer lace scoring device for a veneer lace according to any one of claims 6 to 8, wherein the anvil roll has an elastic body coated on its outer peripheral surface. 10. The veneer lace creasing device for veneer lace according to any one of claims 6 to 9, wherein the anvil roll advancing and retreating mechanism is constituted by a fluid cylinder.