JP2012143885A - Apparatus and method for machining scarf face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for machining a scarf face, with which a flat and smooth scarf face can be obtained, whose machining speed is fast, and whose size is small, and to provide a method for machining the scarf face.SOLUTION: The apparatus 20 for machining the scarf face includes: a base board 21 on which a veneer 1 is placed; a rotary cutter 22 where a plurality of cutting blades 22b are formed at equal intervals on the outer peripheral surface of a disk part 22a and which is arranged to be inclined with respect to the upper surface of the veneer 1; feed mechanisms 23, 24 for horizontally moving the veneer 1 with respect to the rotary cutter 22; and a pressing mechanism 25 for pressing and fixing the veneer 1 when the veneer 1 is cut by the plurality of cutting blades 22b. The apparatus 20 for machining the scarf face is used for machining the end face 1a of the veneer 1 to be the scarf face 1b. A hollow part 22c is formed in the center of the inside of the cutting blade 22b of the rotary cutter 22 in the radial direction. The pressing mechanism 25 is elevated/lowered freely in the hollow part 22c of the rotary cutter 22, is arranged so as not to be rotated and is projected to the lower side of the lower surface of the rotary cutter 22 to press the veneer 1.

Description

  The present invention relates to a scarf surface processing apparatus and a scarf surface processing method for cutting an end portion of a wooden board material into a scarf surface.

When manufacturing a single board laminated material (LVL), when connecting a wooden board material, especially a single board to the vertical direction, the edge part 1a of the single board 1 is cut | disconnected perpendicularly (FIG. 12 (a)), and the cut surfaces are mutually connected. A method called a butt joint, which is bonded (FIG. 12B), is the simplest and has good productivity.
However, in this method, since the bonding area of the veneer 1 is small and it is difficult to apply a pressing pressure to the bonded portion, it is not possible to bond firmly.

Therefore, the end portion 1a of the veneer 1 is cut obliquely (FIG. 13 (a)), and the adhesive S is applied to the oblique cut surface (scarf surface 1b) (FIG. 13 (b)), and the scarf surface 1b. By using a method called a scarf joint to bond each other (FIG. 13C), a method of increasing the bonding area and applying a pressing pressure in the thickness direction has come to be performed. As shown in FIG. 14, this method is often carried out when manufacturing LVL 2 that requires strength, such as structural LVL.
In addition, as shown in FIG. 15, in order to raise the joint strength in a scarf joint, the fiber directions of the two single plates 1 arranged in the vertical direction are both vertical.

When processing this scarf surface 1b, a method of cutting the end portion 1a of the veneer 1 by moving a guillotine-shaped fixed blade obliquely has been generally used (see, for example, Patent Document 1).
However, since the apparatus used in this method is large and requires high accuracy, a scarf surface processing apparatus 10 including a rotary cutting cutter 12 has been disclosed in recent years as shown in FIG. 2 to 4).

In this scarf surface processing apparatus 10, a single plate 1 is placed on a base board 11, and a scarf surface 1 b is formed by a rotary cutting cutter 12.
The rotary cutting cutter 12 has a rotating disk portion 12a, and a plurality of cutting blades 12b are formed on the outer peripheral surface of the disk portion 12a at equal intervals (here, four). The rotary cutting cutter 12 is disposed obliquely with respect to the upper surface of the single plate 1, and the single plate 1 is horizontally moved with respect to the rotary cutting cutter 12 to cut the end portion 1 a of the single plate 1 obliquely. . Further, the upper surface of the single plate 1 is firmly pressed by a pressing mechanism 13 including a pressing plate 13a and a pressing cylinder 13b so that the single plate 1 does not move during cutting.
In the case of the method using the scarf surface processing apparatus 10 provided with such a rotary cutting cutter 12, since the apparatus is also relatively small and can be processed efficiently, it is a homogeneous and somewhat hard material with no nodes, such as Lauan, which is an imported material and hardwood. It is suitable for mass production of LVL2 using a single veneer 1.

However, in recent years, these relatively homogeneous and somewhat hard veneers 1 are becoming difficult to obtain, and the supply has been increased to conifers such as Japanese cedar and imported radiata pine. Since these materials are softer than Lawan and Douglas fir, when the scarf surface 1b is processed with a normal rotary cutting cutter 12 on a thin single plate 1 having a thickness of 3 mm or less, the end of the single plate 1 is obtained. 1a is attracted to the cutting edge 12b of the rotary cutting cutter 12 and vibrates, so that the cutting surface tends to have a lot of irregularities and flutter as shown in FIG. When this biting occurs at the thinnest tip 1c of the single plate 1, there is a problem that the tip 1c is missing.
This tendency becomes more remarkable when the thickness of the entire veneer 1 is further reduced, and not only the tip portion 1c is missing but also the veneer 1 may be broken.

As shown in FIG. 18, the reason why the single plate 1 is attracted to the cutting edge 12b of the rotary cutting cutter 12 and vibrates is that the pressing mechanism 13 that prevents the single plate 1 from moving during cutting is shown in FIG. It is in being away from the scarf surface 1b attracted to 12b.
Further, as another cause of the scarf surface 1b rising and roughing, as shown in FIG. 19A, the rotation axis L of the rotary cutting cutter 12 is located outside the scarf surface 1b to be formed. As shown in FIG. 19B, there is a point that the cutting direction and the fiber direction of the single plate 1 do not coincide. Thus, if the cutting direction and the fiber direction do not coincide with each other, the cutting surface becomes rough because the resistance during cutting is large.

Thus, when the scarf surface 1b is rough, when the adhesive S is applied to the scarf surface 1b and the scarf surfaces 1b are bonded to each other, the adherend surfaces do not adhere to each other and the adhesive S is solidified. Since the pressing pressure to be applied does not act uniformly, the adhesive strength is lowered. In addition, the adhesive S is excessively permeated and absorbed into the ridged portion, resulting in a deficient state in which the amount of the adhesive S is insufficient, which may result in poor adhesion.
In addition, such a conifer has many nodes, and the portions of the nodes are relatively hard. Therefore, unevenness may occur in cutting due to the difference in hardness between the nodes and other portions.

Therefore, as shown in FIG. 20, there is also a method of adding a pressing mechanism 14 that presses the veneer 1 to at least one of the front or rear in the traveling direction of the rotary cutting cutter 12 while using the conventional rotary cutting cutter 12. It has been developed (see, for example, Patent Documents 5 to 7).
Since these pressing mechanisms 14 directly press the vicinity of the portion through which the cutting blade 12b passes in the scarf surface 1b which is attracted to the cutting blade 12b and easily vibrates, the vibration of the single plate 1 can be reduced, and the roughening of the scarf surface 1b can be reduced. A small number of single plates 1 can be manufactured.

  On the other hand, instead of the rotary cutting cutter 12, a method of processing the end portion 1a of the single plate 1 into the scarf surface 1b by grinding using a sander has been developed (see, for example, Patent Document 8). In the case of this method, it is possible to obtain a very uniform and flat cut surface even when the veneer 1 is soft or thin by selecting a sandpaper used with a sander having a large count. The risk of defects and breakage is also reduced.

Japanese Utility Model Publication No. 64-4481 Japanese Patent Laid-Open No. 53-94003 Registered Utility Model No. 3002948 Japanese Examined Patent Publication No. 7-41602 No. 7-45287 JP 2009-73202 A Japanese Patent No. 4275773 Japanese Patent No. 2902510

  However, when performing a scarf joint process on a wood veneer 1 using a conventional method, particularly a thin veneer 1 of 3 mm or less made of soft conifers such as Japanese cedar or imported radiata pine, the following is performed. There is a problem.

1. As described above, in the scarf surface processing apparatus 10 using the rotary cutting cutter 12 according to the conventional example, the portion holding the single plate 1 is separated from the scarf surface 1b. Therefore, the end 1a of the veneer 1 is attracted to the cutting edge 12b of the rotary cutting cutter 12 and vibrates, and the scarf surface 1b is roughened.
Moreover, as shown in FIG. 20, even when the front and rear of the rotary cutting cutter 12 are pressed, the vibration cannot be sufficiently reduced, and it is difficult to completely prevent the scarf surface 1b from being rough. is there.
In the case of a thin veneer 1 of approximately 3 mm or less, or a soft material such as cedar or radiata pine, the scarf surface 1b is particularly rough, and the veneer 1 itself may be broken. .

2. A large amount of adhesive S is applied In the case of a rough and uneven single plate 1, the amount of adhesive S applied is increased in anticipation of excessive absorption of the adhesive S on the unevenness in order to prevent a chipped state. Since it is necessary to set more than the standard usage, it is uneconomical. Further, if the application amount of the adhesive S is increased in accordance with the roughened portion, the adhesive S may protrude excessively in the portion where the roughening is small, and there is a possibility that the adhesive adheres to the surrounding area and is contaminated.

3. Although the machining speed is slow, it is possible to reduce the roughness of the cutting surface by lowering the feed speed of the rotary cutting cutter 12 or the single plate 1. However, the reduction of the feed speed directly leads to the reduction of the machining speed. Further, if the feed rate is slowed down and the cutting edge 12b of the rotary cutting cutter 12 passes the same part many times, there is a risk that scorching due to friction may occur on the scarf surface 1b.
On the other hand, in the grinding process using a sander, the ground surface is extremely smooth and has no flare, but the machining time is extremely long, and it may take several times as long as the rotary cutting cutter 12. In order to shorten the processing time, it is only necessary to make the eyes of the sander rough. However, if the eyes are made rough, the grinding surface will be roughened accordingly, and the merit of using the sander will be halved.

4). The method of cutting the end 1a of the veneer 1 with a guillotine-shaped fixed blade requires a large processing machine with a large blade. For example, when the width of the single plate 1 is 1 m, the blade width needs to be 1 m or more. In addition, high reproducibility is required for the reciprocating motion of the blade so that the angle of the scarf surface 1b does not vary for each single plate 1, so that the structure of the apparatus is complicated and it is necessary to be configured with high accuracy.

  Accordingly, an object of the present invention is to provide a scarf surface processing apparatus and a scarf surface processing method that can obtain a smooth scarf surface, have a high processing speed, and are small in size.

  In order to achieve the above object, a scarf surface processing apparatus (20) according to claim 1 of the present invention includes a base board (21) on which a wooden board (1) is placed, and a rotating disk part (22a). ), And a plurality of cutting blades (22b) are formed at equal intervals on the outer peripheral surface of the disk portion (22a) and are disposed obliquely with respect to the upper surface of the wood board (1). And a feed mechanism (23, 24) for horizontally moving the rotary cutting cutter (22) with respect to the wooden board (1) or the wooden board (1) with respect to the rotary cutting cutter (22). When pressing the wooden board (1) with a plurality of cutting blades (22b) by rotating the disk part (22a) of the rotary cutting cutter (22), the pressing to press and fix the wooden board (1) Comprising a mechanism (25), ) Is a scarf surface processing device (20) for cutting the end portion (1a) into a scarf surface (1b), and is hollow at the center radially inward from the cutting edge (22b) of the rotary cutting cutter (22). A portion (22c) is formed, and the pressing mechanism (25) is movable up and down to the hollow portion (22c) of the rotary cutting cutter (22) and rotates independently of the rotary cutting cutter (22). The pressing body (25) is provided so as to be freely or non-rotatable and protrudes downward from the lower surface of the rotary cutting cutter (22) to press the wood board (1).

  Moreover, the scarf surface processing apparatus (20) according to claim 2 has a base board (21) on which the wood board (1) is placed, and a rotating disk part (22a), and the disk part (22a). A plurality of cutting blades (22b) are formed at equal intervals on the outer peripheral surface of the wood plate, and the rotary cutting cutter (22) is disposed obliquely with respect to the upper surface of the wood board (1), and the rotary cutting cutter (22) Feed mechanism (23, 24) that horizontally moves the wood plate material (1) relative to the wood plate material (1) or the rotary cutting cutter (22), and the disk of the rotary cutting cutter (22) A pressing mechanism (26, 27) for pressing and fixing the wooden board (1) when cutting the wooden board (1) with a plurality of cutting edges (22b) by rotating the portion (22a), The end (1a) of the wood board (1) A scarf surface processing device (20) for cutting the surface (1b), wherein the pressing mechanism (26, 27) is located at the center radially inward of the cutting edge (22b) of the rotary cutting cutter (22). Consists of an air conduction hole (26) formed from the upper part to the lower end, and a compressor (27) for guiding compressed air to the upper part of the air conduction hole (26). The compressed air is supplied from the lower surface of the rotary cutting cutter (22). It is a mechanism that ejects and presses the wood board (1).

  Further, in the scarf surface processing device (20) according to claim 3, the feed mechanism (23, 24) moves the rotary cutting cutter (22) horizontally with respect to the wood board (1). One or more suction holes (28) from the upper surface to the lower part of the base board (21) on which the end (1a) on which the scarf surface (1b) of the wood board (1) is formed are placed. ) And a suction machine (29) is provided below the suction hole (28), and the wooden board (1) is sucked into the base board (21) through the suction hole (28). It is fixed.

  Moreover, the scarf surface processing method of Claim 4 presses and fixes the wooden board | plate material (1) mounted in the base board (21) with a press mechanism (25), and rotates the disk part (22a). A plurality of cutting edges (22b) are formed at equal intervals on the outer peripheral surface, and an end of the wooden board (1) is provided by a rotary cutting cutter (22) disposed obliquely with respect to the upper surface of the wooden board (1). A scarf surface processing method for cutting a portion (1a) into a scarf surface (1b), wherein the presser can be moved up and down in a radial direction from the cutting edge (22b) of the rotary cutting cutter (22) ( 25) is made to project downward from the lower surface of the rotary cutting cutter (22), thereby pressing the formed scarf surface (1b) and the rotary cutting cutter (22) of the wood board (1). End (1a) Wherein the cutting the kerf plane (1b).

  Moreover, the scarf surface processing method of Claim 5 is a disk part (22a) which presses and fixes the wooden board | plate material (1) mounted in the base board (21) with a press mechanism (26,27), and rotates. A plurality of cutting blades (22b) are formed at equal intervals on the outer peripheral surface of the wooden board material (1), and the wooden board material (1) is provided by a rotary cutting cutter (22) disposed obliquely with respect to the upper surface of the wooden board material (1). Is a scarf surface machining method in which an end (1a) of the blade is cut into a scarf surface (1b), and is formed from the upper part to the lower end at the center radially inward of the cutting edge (22b) of the rotary cutting cutter (22). The compressed air is injected to the formed scarf surface (1b) through the air conduction hole (26) to press the scarf surface (1b), and the woody material is rotated by the rotary cutting cutter (22). End of plate (1) Characterized by cutting the 1a) scarf face (1b).

  Moreover, the scarf surface processing method of Claim 6 is the said wooden board | plate material, when the edge part (1a) of the said wooden board | plate material (1) is cut into the scarf surface (1b) by the said rotary cutting cutter (22). One or a plurality of suction holes (28) formed from the upper surface to the lower part in the part of the base board (21) on which the end (1a) on which the scarf surface (1b) of (1) is formed are placed. The wood board (1) is sucked through and fixed to the base board (21).

  Further, in the scarf surface processing apparatus (20) and the scarf surface processing method according to claim 7, the rotation axis (L) of the rotary cutting cutter (22) is positioned at the tip (1c) of the scarf surface (1b). As described above, the rotary cutting cutter (22) is arranged.

  In addition, the wood board material here means wood materials in general, such as a single board, a board material (saw-milled product), a plywood, LVL, a laminated board, fiber boards, such as MDF.

  Here, the symbols in the parentheses indicate corresponding elements or corresponding matters described in the drawings and the embodiments for carrying out the invention described later.

According to the scarf surface processing apparatus of claim 1 of the present invention, a hollow portion is formed in the center radially inward from the cutting edge of the rotary cutting cutter, and can be raised and lowered to the hollow portion of the rotary cutting cutter. In addition, the lower surface of the rotary cutting cutter is provided when a pressing body is provided independently of the rotary cutting cutter so as to be rotatable or non-rotatable, and when cutting the wood board with a plurality of cutting blades by rotating the disk portion of the rotary cutting cutter. Since the veneer is pressed by a pressing body projecting further downward, a smooth scarf surface can be obtained even if the wooden board is a thin veneer or a soft material having a thickness of 3 mm or less.
In other words, the scarf surface that is attracted to the cutting blade and easily vibrates is directly pressed by the pressing body in the radial direction from the cutting blade of the rotary cutting cutter, so that the vicinity of the portion through which the cutting blade passes can be pressed. Vibration can be minimized. Moreover, since the area to be pressed is large, the vibration of the wooden board is small. Therefore, the scarf surface is not rough and smooth. Of course, the wood board is not broken.
As a result, since the adhesive applied to the scarf surface at the time of the scarf joint is not absorbed excessively, the application amount of the adhesive is only a standard use amount, which is economical.
Moreover, since the roughening of the scarf surface is suppressed by pressing the wooden plate material with a pressing body radially inward from the cutting edge, it is not necessary to reduce the feed rate of the rotary cutting cutter or the wooden plate material to suppress the roughening of the scarf surface. That is, scarf surface processing is possible without reducing the processing speed.

Moreover, since it cuts into a scarf surface with a rotary cutting cutter, compared with the case where it grinds with a sander, a processing speed is quick.
Thus, since the processing speed is high, the scarf surface is hardly burnt by friction.
Further, since the rotary cutting cutter is provided with a feed mechanism for horizontally moving the rotary cutting cutter with respect to the wooden board or with respect to the rotary cutting cutter, even if the rotary cutting cutter is small and light, the other end of the wooden board is used. The scarf surface can be processed by relatively moving the rotary cutting cutter. Also, since it is sufficient that the rotary cutting cutter or the wooden board can be moved horizontally by the feed mechanism, for example, a simple attachment such as additionally installing the rotary cutting cutter on the feed belt can be practically used, and the scarf can be used with particularly high accuracy. It is not required that the surface processing apparatus be configured.

Moreover, according to the scarf surface processing apparatus of Claim 2, the air conduction hole formed from the upper part to the lower end in the center inside radial direction from the cutting blade of a rotary cutting cutter, and compressed air to the upper part of an air conduction hole When a wood board is cut with a plurality of cutting blades by rotating the disk part of the rotary cutting cutter, a compressed air is ejected from the lower surface of the rotary cutting cutter to remove the wood board. Since it presses, a smooth scarf surface can be obtained even if the wood board is a thin single board or a soft material, as in the invention described in claim 1.
Therefore, the amount of adhesive applied can be the standard amount used, and the processing speed does not have to be reduced.
Moreover, since it cuts into a scarf surface with a rotary cutting cutter, compared with the case where it grinds with a sander, a processing speed is quick.
Further, the pressing of the wood board material with the compressed air has a lower resistance during the cutting process than the case where the wood board material is directly pressed by the pressing body as in the first aspect of the invention, so that the machining speed is high.
Furthermore, since the rotary cutting cutter is provided with a feed mechanism that horizontally moves the rotary cutting cutter with respect to the wooden board or with respect to the rotary cutting cutter, the scarf surface processing is possible even if the rotary cutting cutter is small and light. . Moreover, the structure of the scarf surface processing apparatus is simple.
Moreover, since compressed air is ejected with respect to a wooden board | plate material, the site | part to be cut can be cooled and it is hard to produce a burn.

  Moreover, according to the scarf surface processing apparatus of Claim 3, in addition to the effect of the invention of Claim 1 or 2, a feed mechanism moves a rotary cutting cutter horizontally with respect to a wooden board material, One or a plurality of suction holes are formed from the upper surface to the lower part of the base board portion where the end portion on which the scarf surface of the wood board is formed is placed, and a suction machine is provided at the lower part of the suction hole to perform suction. Since the wooden board is sucked through the hole and fixed to the base board, the vibration of the edge of the wooden board can be suppressed and a smooth scarf surface can be obtained.

  Moreover, according to the scarf surface processing method of Claim 4, by making the pressing body which can be raised / lowered provided in the radial inside rather than the cutting blade of the rotary cutting cutter protrude below the lower surface of the rotary cutting cutter. In addition to pressing the formed scarf surface and cutting the end of the wood board into the scarf surface with a rotary cutting cutter, even if the cutting blade passes over the scarf surface, the part of the scarf surface becomes the cutting blade Hard to be attracted and vibrated. Therefore, the scarf surface is not rough and smooth.

Moreover, according to the scarf surface processing method of Claim 5, the air compressed through the air conduction hole formed from the upper part to the lower end in the center inside radial direction rather than the cutting blade of a rotary cutting cutter is formed. The scarf surface is sprayed to press the scarf surface, and the end of the wooden board is cut into the scarf surface by a rotary cutting cutter, so that the cutting blade is cut on the scarf surface in the same manner as in the invention of claim 4. Even if it passes, the part of the scarf surface is hard to be attracted to the cutting blade and hardly vibrates. Therefore, the scarf surface is not rough and smooth.
Moreover, since the compressed air is sprayed on the scarf surface, the part to be cut can be cooled, and the scarf surface is hardly burnt.

  Moreover, according to the scarf surface processing method of Claim 6, in addition to the effect of the invention of Claim 5, when cutting the edge part of a wooden board material to a scarf surface with a rotary cutting cutter, Since the wood board is sucked and fixed to the base board through one or a plurality of suction holes formed from the upper surface to the lower part in the base board part where the end portion on which the scarf surface is formed is placed, it is a single layer of wood The vibration at the end of the plate material can be suppressed, and a smooth scarf surface can be obtained.

  Moreover, according to the scarf surface processing apparatus and scarf surface processing method of Claim 7, in addition to the effect of the invention of Claims 1 thru | or 6, the rotating shaft of a rotary cutting cutter is located in the front-end | tip part of a scarf surface. As described above, since the rotary cutting cutter is arranged, the fiber direction of the wood board and the cutting direction substantially coincide with each other at the tip end portion of the scarf surface that is most thin and easily chipped. Therefore, since the resistance at the time of cutting is small, even the tip part of the scarf surface that is thinnest is hardly chipped. Moreover, since the area for pressing the scarf surface is large at this time, the vibration of the wooden board is small. Therefore, the scarf surface is not rough and smooth.

  In addition, as in the scarf surface processing apparatus and scarf surface processing method of the present invention, a hollow portion is formed in the center on the radially inner side from the cutting edge of the rotary cutting cutter, and the hollow portion of the rotary cutting cutter can be raised and lowered freely. In addition, a pressing body is provided that is rotatable or non-rotatable independently of the rotary cutting cutter, and when cutting the end of the wood board into a scarf surface with a plurality of cutting blades, the lower side of the rotary cutting cutter is below The point which presses a wooden board | plate material with the press body which protrudes in is not described at all in patent document 1 thru | or 8 mentioned above.

It is a perspective view which shows the rotary cutting cutter in the scarf surface processing apparatus which concerns on 1st embodiment of this invention. It is the AA line expanded sectional view of FIG. 1 which shows the rotary cutting cutter in the scarf surface processing apparatus which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on 1st embodiment of this invention. It is a schematic diagram which shows the presence or absence of the press in the scarf surface processing apparatus which concerns on 1st embodiment of this invention, and an oblique line part shows a location with a press. It is a schematic diagram which shows the cutting direction of the single plate by the scarf surface processing apparatus which concerns on 1st embodiment of this invention, (a) is the positional relationship of a rotary cutting cutter and a scarf surface, (b) is a cutting direction and single. The fiber direction of a board is shown, respectively. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on 3rd embodiment of this invention. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on other embodiment of this invention. It is a schematic diagram which shows the presence or absence of the press in the scarf surface processing apparatus which concerns on further another embodiment of this invention, and a shaded part shows the location with a press. It is a longitudinal cross-sectional view which shows the scarf surface processing apparatus which concerns on other embodiment of this invention. It is a side view which shows the butt joint which is the method of connecting two single plates, Comprising: (a) shows before connection, (b) shows after connection, respectively. It is a side view which shows the scarf joint which is the method of connecting two single plates, (a) is the state which cut the edge part of a single plate into the scarf surface, (b) is an adhesive agent to a scarf surface. (C) shows the state after connection, respectively. It is a side view which shows LVL for structure. It is a perspective view which shows the single plate in the scarf joint which is the method of connecting two single plates. It is a perspective view which shows the scarf surface processing apparatus using the rotary cutting cutter which concerns on a prior art example. It is a side view which shows the rough scarf surface cut by the scarf surface processing apparatus shown in FIG. It is a schematic diagram which shows the presence or absence of the press in the scarf surface processing apparatus shown in FIG. 16, and a shaded part shows a location with a press. It is a schematic diagram which shows the cutting direction of the single plate by the scarf surface processing apparatus shown in FIG. 16, (a) shows the positional relationship between the rotary cutting cutter and the scarf surface, and (b) shows the cutting direction and the fiber direction of the single plate. Each is shown. It is a schematic diagram which shows the presence or absence of the press in the scarf surface processing apparatus using the rotary cutting cutter which concerns on another prior art example, and an oblique line part shows a location with a press.

(First embodiment)
With reference to FIG. 1 thru | or FIG. 5, the scarf surface processing apparatus 20 and the scarf surface processing method which concern on 1st embodiment of this invention are demonstrated.
This scarf surface processing apparatus 20 is a scarf formed by obliquely cutting an end portion 1a of a wooden veneer 1 as a pre-stage of a connection method called a scarf joint for connecting two veneers 1 having a thickness of about 3 mm. It is an apparatus for forming the surface 1b, and includes a base board 21, feed mechanisms 23 and 24, a rotary cutting cutter 22, and a pressing body 25.
The veneer 1 used here is a conifer such as Japanese cedar and imported radiata pine, which are softer than Lawan and Douglas Fir.

As shown in FIG. 3, the base board 21 is a table on which the single plate 1 is placed. On the upper surface of the base board 21, a concave groove 21a for arranging the feed belt 23 is formed.
Further, when the end 1a of the single plate 1 placed on the base board 21 is cut obliquely, the upper end 21b of the base board 21 is large so that the rotary cutting cutter 22 does not interfere with the base board 21. A chamfer C is formed, and the angle θ2 of the chamfer C from the horizontal plane is slightly larger than the angle θ1 of the tip 1c of the scarf surface 1b to be formed. The position of the end 21b of the base board 21 is near the cutting edge 22b.

The feed mechanisms 23 and 24 are a feed belt 23 and a holding belt 24 that horizontally move the veneer 1 with respect to the rotary cutting cutter 22, both of which are endless tracks.
Since the feed belt 23 is disposed in the concave groove 21a of the base board 21 and the upper surface of the feed belt 23 is slightly higher than the upper face of the base board 21, the veneer 1 is precisely the feed belt 23. It is in a state of being placed on A pressing belt 24 is disposed above the single plate 1, and the single plate 1 is sandwiched from above and below by the feed belt 23 and the pressing belt 24. By operating the feeding belt 23 and the pressing belt 24 in synchronization with each other, the single plate 1 is translated from the back side to the front side in FIG. Further, the feed belt 23 and the pressing belt 24 can be operated in the opposite direction.

The rotary cutting cutter 22 includes a rotating disk part 22a and a cylindrical part 22d that is smaller than the outer diameter D1 of the disk part 22a and formed integrally above the disk part 22a. The disc part 22a and the cylindrical part 22d are located on the concentric axis.
A plurality of cutting edges 22b (four in this case) are formed at equal intervals on the outer peripheral surface of the disk portion 22a. The outer diameter D3 of the disk part 22a including this cutting edge 22b is larger than the vertical width W1 of the scarf surface 1b to be formed.
A hollow portion 22c having an inverted T-shaped cross section and opening on the lower surface of the disk portion 22a is formed at the center radially inward of the cutting blade 22b of the rotary cutting cutter 22.
Such a rotary cutting cutter 22 is disposed obliquely with respect to the upper surface of the veneer 1 and the rotational axis L of the rotary cutting cutter 22 is positioned at the tip 1c of the scarf surface 1b to be formed and fixed. Is done. That is, the rotary cutting cutter 22 only rotates on the spot and does not move during cutting. In addition, the front-end | tip part 1c of this scarf surface 1b means the front-end | tip part (the left end of the single plate 1 in FIG. 3, the lower end of the single plate 1 in FIG. 4) whose cross-sectional shape is an acute angle in the scarf surface 1b.

The pressing body 25 is slightly smaller than the hollow portion 22c of the rotary cutting cutter 22, and is provided so as to be fitted into the hollow portion 22c from below. The pressing body 25 and the rotary cutting cutter 22 are located on a concentric axis. The cylinder 25 a disposed in the hollow portion 22 c of the cylindrical portion 22 d of the rotary cutting cutter 22 expands and contracts, so that the pressing body 25 can be raised and lowered with respect to the rotary cutting cutter 22. Further, the pressing body 25 is independent of the rotary cutting cutter 22, and even if the rotary cutting cutter 22 rotates, the pressing body 25 cannot rotate.
Further, the hollow portion 22c between the rotary cutting cutter 22 and the pressing body 25 has a ball bearing so that the friction between the rotary cutting cutter 22 and the pressing body 25 is reduced and the rotary cutting cutter 22 rotates smoothly. 31 is provided.
Then, when the single plate 1 is cut with the plurality of cutting blades 22b to form the scarf surface 1b by rotating the disk portion 22a of the rotary cutting cutter 22, the pressing body 25 is below the lower surface of the rotary cutting cutter 22. The scarf surface 1b of the veneer 1 is pressed and fixed.
When pressing in this way, the cylinder 25a is adjusted so that the pressing force is appropriate. If this force is too large, the frictional resistance with the scarf surface 1b during cutting increases, and if it is too small, the formed scarf surface 1b vibrates and the scarf surface 1b becomes rough.

Next, a scarf surface processing method using the scarf surface processing apparatus 20 will be described.
First, the single plate 1 is placed on the base board 21 (feed belt 23), and the upper surface of the single plate 1 is pressed by the pressing belt 24. At this time, the rotary cutting cutter 22 is arranged on the front side of the paper surface in FIG.

Next, the rotary cutting cutter 22 is operated and rotated on the spot.
Then, the feed belt 23 is operated to move the single plate 1 horizontally toward the rotary cutting cutter 22.
At this time, the formed scarf surface 1b is pressed by projecting a vertically movable pressing body 25 provided radially inward from the cutting edge 22b of the rotary cutting cutter 22 below the lower surface of the rotary cutting cutter 22. At the same time, the end 1a of the veneer 1 is cut into the scarf surface 1b by the rotary cutting cutter 22.

According to the scarf surface processing apparatus 20 and the scarf surface processing method configured as described above, a hollow portion 22c is formed at the center radially inward of the cutting edge 22b of the rotary cutting cutter 22, and the rotary cutting cutter 22 is also formed. When the single plate 1 is cut with a plurality of cutting blades 22b by rotating the disk part 22a of the rotary cutting cutter 22, the rotary body 22c is rotated and rotated. Since the veneer 1 is pressed by the pressing body 25 projecting downward from the lower surface of the cutter 22, even if it is a thin veneer 1 or a soft material of 3 mm or less, a smooth scarf surface 1b can be obtained.
That is, as shown in FIG. 4, the scarf surface 1b that is attracted to the cutting edge 22b and easily vibrates is pressed directly by the pressing body 25 on the radially inner side from the cutting edge 22b of the rotary cutting cutter 22, so that the cutting edge 22b passes. The vicinity of the part to be performed can be suppressed, and the vibration of the single plate 1 can be minimized. Moreover, since the area to be pressed is large, the vibration of the single plate 1 is small. Therefore, the scarf surface 1b is not rough and smooth. Of course, the veneer 1 is not broken.
Further, as shown in FIG. 5 (a), the rotation axis L of the rotary cutting cutter 22 is arranged so as to be positioned at the tip 1c of the scarf surface 1b to be formed, so as shown in FIG. 5 (b). Moreover, the fiber direction of the veneer 1 and the cutting direction substantially coincide with each other at the tip 1c of the scarf surface 1b that is most thin and easily chipped. Therefore, since the resistance at the time of cutting is small, even the tip 1c of the scarf surface 1b that is thinnest is hardly chipped. In addition, at this time, as indicated by the hatched portion on the lower side in FIG. 4, the scarf surface 1b is less likely to be rough because the area for pressing the scarf surface 1b is large.
As a result, since the adhesive applied to the scarf surface 1b at the time of the scarf joint is not absorbed excessively, the application amount of the adhesive is only a standard use amount, which is economical.

Moreover, since the roughening of the scarf surface 1b is suppressed by pressing the single plate 1 with the pressing body 25 radially inward from the cutting edge 22b, it is necessary to reduce the feed rate of the single plate 1 to suppress the roughening of the scarf surface 1b. Absent. That is, the scarf surface 1b can be processed without reducing the processing speed.
Moreover, since it cuts into the scarf surface 1b with the rotary cutting cutter 22, a processing speed is quick compared with the case where it grinds with a sander.
Thus, since the processing speed is high, the scarf surface 1b is hardly burnt by friction.

  Furthermore, since the feed mechanisms 23 and 24 for horizontally moving the veneer 1 with respect to the rotary cutting cutter 22 are provided, even if the rotary cutting cutter 22 is small and light, the rotary cutting cutter is from one end to the other end of the veneer 1. The scarf surface 1b can be processed by moving 22 relatively. In addition, since it is sufficient that the veneer 1 can be moved horizontally by the feed mechanisms 23 and 24, even a simple attachment such as additionally installing the rotary cutting cutter 22 on the feed belt 23 can withstand practical use, and the scarf can be used with particularly high accuracy. It is not required that the surface processing apparatus 20 is configured.

(Second embodiment)
Next, with reference to FIG. 6, the scarf surface processing apparatus 20 which concerns on 2nd embodiment of this invention is demonstrated. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.
The difference of this embodiment from the first embodiment is the rotary cutting cutter 22 and the pressing body 25, and the other components are the same as those of the first embodiment.

A donut-shaped hollow portion 22 c that opens to the lower surface is formed on the inner side in the radial direction from the cutting edge 22 b of the disk portion 22 a of the rotary cutting cutter 22. A substantially disc-shaped pressing body 25 is fitted in the hollow portion 22 c, and a ball bearing 31 is provided between the rotary cutting cutter 22 and the pressing body 25. Further, the pressing body 25 can be raised and lowered by the spring 32 in the hollow portion 22c.
Unlike the pressing body 25 in the first embodiment, the pressing body 25 in the present embodiment is rotatable independently of the rotary cutting cutter 22.
However, even if it is said to be rotatable, the pressing body 25 is not directly rotated by power, but only rotates at a lower speed than the rotation of the rotary cutting cutter 22 as the rotary cutting cutter 22 rotates. When the pressing body 25 presses the single plate 1, the rotary cutting cutter 22 remains rotating and the pressing body 25 stops rotating.

  Thus, even if the pressing body 25 is freely rotatable, the place itself pressed by the single plate 1 is the same as that in the first embodiment, so that a smooth scarf surface 1b can be obtained.

(Third embodiment)
Next, with reference to FIG. 7, the scarf surface processing apparatus 20 which concerns on 3rd embodiment of this invention is demonstrated. In addition, the same code | symbol was attached | subjected to the same part as 1st embodiment.
The difference of this embodiment from the first embodiment is a mechanism for pressing the veneer 1 and other components are the same as those of the first embodiment.

In the present embodiment, an air conduction hole 26 is formed from the top to the bottom at the center radially inward of the cutting edge 22b of the rotary cutting cutter 22. The air conduction hole 26 has an enlarged diameter in the disk portion 22a of the rotary cutting cutter 22, and is wider than the vertical width W1 of the scarf surface 1b on the lower surface of the disk portion 22a.
A compressor 27 that guides compressed air to the lower end of the air conduction hole 26 is provided above the air conduction hole 26.
And when cutting the single plate 1 with the some cutting blade 22b, compressed air is ejected from the lower surface of the rotary cutting cutter 22, and the single plate 1 is pressed.

Thus, even if the mechanism for pressing the veneer 1 is composed of the air conduction hole 26 and the compressor 27, the portion to be pressed by the veneer 1 is the same as in the first embodiment, so that it is smooth. The scarf surface 1b can be obtained.
Further, the pressing of the veneer 1 with compressed air has less resistance during cutting compared to the case where the veneer 1 is directly pressed by the pressing body 25 as in the first and second embodiments, so that the processing speed is reduced. Is fast.
Furthermore, since compressed air is ejected to the veneer 1, the part to be cut can be cooled, and the scarf surface 1b is hardly burnt.
Further, the angle θ2 of the chamfer C from the horizontal plane is slightly larger than the angle θ1 of the tip 1c of the scarf surface 1b, and the position of the end 21b of the base board 21 is near the cutting edge 22b. After firmly pressing the front end portion 1c of the surface 1b, it is discharged from the lower surface of the disk portion 22a. If the angle θ2 of the chamfer C from the horizontal plane is much larger than the angle θ1 of the tip 1c of the scarf surface 1b, or the position of the end 21b of the base board 21 is radially inward of the cutting edge 22b (for example, In the case of the vicinity of the center part of the disk part 22a), the compressed air escapes to the outside without sufficiently pressing the tip part 1c of the scarf surface 1b, so that the effect of pressing becomes low.

In addition, the scarf surface processing apparatus 20 is not restricted to what concerns on 1st thru | or 3rd embodiment, It is provided with the feed mechanism (not shown) which horizontally moves the rotary cutting cutter 22 with respect to the single plate 1, FIG. As shown in FIG. 8, a plurality of suction holes 28 may be formed from the upper surface to the lower part of the base board 21 where the end 1a on which the scarf surface 1b of the single plate 1 is formed is placed. . The suction hole 28 is disposed near the tip 1c of the scarf surface 1b that is thinnest and easily chipped. A suction machine 29 is provided below the suction hole 28, and the single plate 1 is sucked from below through the suction hole 28 and fixed to the base board 21. At this time, the pressing belt 24 only presses the single plate 1 and does not move.
Since this suction serves as an aid when pressing the scarf surface 1b (particularly the tip portion 1c) with the pressing body 25, it is possible to suppress vibration of the single-plate 1 end portion 1a and to obtain a smooth scarf surface 1b. .

  In addition to the scarf surface processing apparatus 20 that directly presses the veneer 1 with the pressing body 25, as shown in FIG. 9, in the scarf surface processing apparatus 20 that presses the scarf surface 1b with compressed air, A suction hole 28 may be formed in 21 to suck the single plate 1.

Further, even when the suction is not performed from below, the feed mechanism may horizontally move the rotary cutting cutter 22 with respect to the single plate 1.
Furthermore, the configuration of the rotary cutting cutter 22 and the pressing body 25 is not limited to that according to the first to third embodiments as long as the pressing body 25 is positioned radially inward from the cutting edge 22b of the rotary cutting cutter 22. .

  Moreover, in 1st and 2nd embodiment, while pressing the single plate 1 in the position away from the scarf surface 1b, the scarf surface 1b was pressed by the press body 25 on the radial inside from the cutting edge 22b of the rotary cutting cutter 22. However, the present invention is not limited to this, and as shown in FIG. 10, the scarf surfaces 1 b before and after the rotary cutting cutter 22 in the traveling direction may be pressed by a pressing mechanism 33 different from the pressing belt 24 and the pressing body 25. . Thereby, since the vibration of the scarf surface 1b can be further suppressed, ideal cutting can be performed.

Further, the feed belt 23 and the pressing belt 24 do not need to be endless tracks, and are not limited to this as long as the single plate 1 can be moved in parallel. Also, these need not be belts.
In addition, although there are a plurality of suction holes 28, the present invention is not limited to this and may be one.

  Moreover, although the rotary cutting cutter 22 was arrange | positioned so that the rotating shaft L of the rotating cutting cutter 22 may be located in the front-end | tip part 1c of the scarf surface 1b, it is not restricted to this, As shown in FIG. L may be located near the center in the longitudinal direction of the scarf surface 1b. In this case, the fiber direction and cutting direction of the veneer 1 are slightly different at the tip 1c of the scarf surface 1b, but not so different as to cause reverse stitches. And since the scarf surface 1b is firmly pressed by the pressing body 25 on the radially inner side of the cutting blade 22b of the rotary cutting cutter 22 and the area thereof is large, the scarf surface 1b is also smooth.

  Moreover, although the position of the edge part 21b of the base board 21 was set to the cutting blade 22b vicinity, it is not restricted to this, It is a location away from the cutting blade 22b to the radial direction outer side (for example, the left direction in FIG. 3). Also good. That is, in this case, the chamfer C of the base board 21 is larger than that in FIG.

  In the third embodiment, when the veneer 1 is thin and the longitudinal width W1 of the scarf surface 1b is much smaller than the radius of the disk portion 22a, the diameter of the air conduction hole 26 from the enlarged portion of the disk portion 22a is increased. Since the compressed air escapes to the upper surface side of the veneer 1 and the effect of pressing is reduced, a wedge-shaped gap closing material is provided between the upper surface of the veneer 1 and the lower surface of the disk portion 22a, so that the compressed air is difficult to escape. It may be made to become. Alternatively, the compressed air can hardly escape to the upper surface side of the single plate 1 by using the air conduction hole 26 having a diameter of the enlarged diameter portion of the disk portion 22a narrowed to about the vertical width W1 of the scarf surface 1b. Also good.

  Moreover, although the thin veneer 1 was processed with the scarf surface processing apparatus 20, it is not restricted to this, It is not limited to this, It is general to wooden board materials 1, such as fiberboards, such as board | plate material (lumber product), plywood, LVL, laminated material, and MDF Applicable. The wood board 1 having a thickness of 10 to several tens of mm or more is harder to vibrate than the thin single board 1 when the scarf surface is processed, but the tip portion 1c that is thin is chipped more than other parts. It doesn't change easily. Therefore, the scarf surface processing apparatus 20 and the scarf surface processing method are useful regardless of the thickness of the wooden board 1.

1 Wood board (single board)
1a end 1b scarf surface 1c tip 2 LVL
DESCRIPTION OF SYMBOLS 10 Scarf surface processing apparatus 11 Base board 12 Rotary cutting cutter 12a Disk part 12b Cutting blade 13 Pressing mechanism 13a Pressing plate 13b Pressing cylinder 14 Pressing mechanism 20 Scarf surface processing apparatus 21 Base board 21a Groove 21b End 22 Rotary cutting cutter 22a Disk Part 22b Cutting edge 22c Hollow part 22d Column part 23 Feed belt (feed mechanism)
24 Presser belt (feed mechanism)
25 Pressing body (pressing mechanism)
25a Cylinder 26 Air conduction hole (Pressing mechanism)
27 Compressor (Pressing mechanism)
28 Suction hole 29 Suction machine 31 Ball bearing 32 Spring 33 Press mechanism C Chamfering D1 Outer diameter of the disk part D2 Outer diameter of the cylindrical part D3 Outer diameter of the disk part including the cutting edge L Rotating shaft W1 Vertical width of the scarf surface θ1 Scarf Angle of the tip of the surface θ2 Angle of the chamfer from the horizontal plane

Claims (7)

A base board on which a wooden board is placed;
A rotating cutting cutter having a rotating disk part and a plurality of cutting blades formed at equal intervals on the outer peripheral surface of the disk part and arranged obliquely with respect to the upper surface of the wood board,
A feed mechanism that horizontally moves the rotary cutting cutter with respect to the wooden board or with respect to the rotary cutting cutter;
A rotation mechanism is provided that presses and fixes the wooden board when the wooden board is cut with a plurality of cutting blades by rotating the disk part of the rotary cutting cutter, and the end of the wooden board is cut into a scarf surface. A scarf surface processing device,
A hollow portion is formed in the center inside the radial direction from the cutting edge of the rotary cutting cutter,
The pressing mechanism can be raised and lowered in a hollow portion of the rotary cutting cutter, and is provided so as to be rotatable or non-rotatable independently of the rotary cutting cutter. A scarf surface processing apparatus, which is a pressing body that presses a plate material. A base board on which a wooden board is placed;
A rotating cutting cutter having a rotating disk part and a plurality of cutting blades formed at equal intervals on the outer peripheral surface of the disk part and arranged obliquely with respect to the upper surface of the wood board,
A feed mechanism that horizontally moves the rotary cutting cutter with respect to the wooden board or with respect to the rotary cutting cutter;
A rotation mechanism is provided that presses and fixes the wooden board when the wooden board is cut with a plurality of cutting blades by rotating the disk part of the rotary cutting cutter, and the end of the wooden board is cut into a scarf surface. A scarf surface processing device,
The pressing mechanism includes an air conduction hole formed from the upper part to the lower end in the center radially inward of the cutting edge of the rotary cutting cutter, and a compressor for guiding compressed air to the upper part of the air conduction hole. A scarf surface processing apparatus, which is a mechanism for ejecting compressed air from a lower surface of a cutter to press the wood board. The feed mechanism moves the rotary cutting cutter horizontally with respect to the wood board,
One or a plurality of suction holes are formed from the upper surface to the lower part of the base board portion on which the end portion on which the scarf surface of the wood board is formed is placed, and a suction machine is provided below the suction holes The scarf surface processing apparatus according to claim 1, wherein the wood board is sucked and fixed to the base board through the suction holes. A wooden board placed on the base board is pressed and fixed by a pressing mechanism, and a plurality of cutting blades are formed at equal intervals on the outer peripheral surface of the rotating disk part and arranged obliquely with respect to the upper surface of the wooden board A scarf surface processing method in which an end of the wooden board is cut into a scarf surface by a rotating cutting cutter,
While pressing the formed scarf surface by causing a pressing body, which can be moved up and down, to protrude downward from the lower surface of the rotary cutting cutter, the rotary head is rotated and rotated. A scarf surface processing method comprising cutting an end portion of the wooden board material into a scarf surface by a cutting cutter. A wooden board placed on the base board is pressed and fixed by a pressing mechanism, and a plurality of cutting blades are formed at equal intervals on the outer peripheral surface of the rotating disk part and arranged obliquely with respect to the upper surface of the wooden board A scarf surface processing method in which an end of the wooden board is cut into a scarf surface by a rotating cutting cutter,
While pressing the scarf surface by injecting compressed air through the air conduction hole formed from the upper part to the lower end at the center radially inward of the cutting edge of the rotary cutting cutter, The scarf surface processing method characterized by cutting the edge part of the said wooden board | plate material into a scarf surface with the said rotary cutting cutter.   When the end of the wooden board is cut into a scarf surface by the rotary cutting cutter, the end of the wooden board is formed from the upper surface to the lower part of the base board on which the scarf surface is formed. The scarf surface processing method according to claim 5, wherein the wood board is sucked and fixed to the base board through one or a plurality of suction holes.   The scarf surface processing apparatus according to any one of claims 1 to 6, wherein the rotary cutting cutter is disposed so that a rotation axis of the rotary cutting cutter is located at a tip portion of the scarf surface. And scarf surface processing method.

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