JPS5912801A - Device for removing curl of veneer in veneer lathe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a veneer race that cuts a wide thin sheet-like veneer veneer using a cutting blade that spans the entire length of a raw log while rotating the left and right wood CI end faces of a raw log by a spindle. This is related to a device that uses veneer lace to eliminate the so-called veneer curl phenomenon, in which veneer curves upward due to stress during cutting, at the same time as the cutting process. With veneer veneers, stress during cutting can cause cracks on the back side of the veneer, causing the veneer to curl in an arched shape, which hinders various operations after the cutting process. This made it difficult to automate or directly connect the production line. In order to correct these curled veneers, attempts have been made to, for example, connect a uniquely designed tenderizing device directly to the veneer lace and forcibly feed the veneer to the tengu device, but this method results in a meandering conveyance of the curled veneer. - In addition, many technologies have been published that incorporate curl removal devices into the veneer lace itself, but many of these technologies remove the veneer using a rotating body with sharp protrusions on the outer circumferential surface. Since the veneer itself obtains a tenderizing effect by being transported, it inevitably receives many punctures from the puncture body, and +1 remains on the board as stinging pain. As a result, the quality of the product was extremely low, resulting in a disadvantage.The present invention completely eliminates the disadvantages caused by stings.

In order to achieve the above-mentioned objective 1, the present invention uses a veneer cutting blade necessary for conventional veneer lace, and a blade L1 interval (the cutting edge of the cutting blade and the raw wood pressing point of the Blenseever) in accordance with the thickness of the cut veneer. The thickness of the veneer to be cut is determined by the distance between The relatively small diameter 111111:Row 4A Sai Ninov is equipped with a plurality of disk-shaped roller discs whose outer circumferential surfaces that come in contact with each other are flat and rotate at a faster outer circumferential speed than the outer circumferential speed of the raw wood, and which is constructed using mini bearings, etc. A plurality of guide rollers are arranged on the F side of the T-isk, and a plurality of guide rollers that repeatedly move away from and approach the pressure roller are arranged near the lower surface of the pressure bar body.

Hereinafter, one embodiment of the present invention will be explained based on the drawings. Figure 1 is a cross-sectional side view of the main part of the cutting board of the Begnare filter according to the present invention, and Figure 2 is a partially enlarged view of Figure 1. The figure is
Reference numeral 1 denotes a raw wood to be cut, which is the raw material for the veneer V. Normally, its left and right end faces are held between left and right spindles (not shown) and rotated in the direction of arrow A. Reference numeral 11 is a frustum of a frustum, a part of which is shown in the figure.A frustum generally has a triangular cross section, and its base is located in the F direction.Reference numeral 12 is a log 1 With a blade for cutting a veneer, place the cutting edge upward at a predetermined position on the front surface of the frustum (the side facing the log 1) using a clamping device using a hydraulic cylinder, for example, so that the edge line is parallel to the axis of the log 1. It seems to be kept tight. Reference numeral 13 designates the base, which is often made of a material such as stainless steel, and is attached over the entire width direction of the frustum (lengthwise direction of the log 1) so that the mounting surface of the cutter 12 on the frustum 11 is 12°. The 11-karat gold 16 is composed of a single 11-karat gold extending in the width direction of the truncated cone, or may be divided and arranged as appropriate, or may be in contact with the entire surface of the cutter 12, or the intermediate portion thereof may be omitted as appropriate.

The tip of the 11-karat gold 13 has an acute-angled cross section as shown in the figure, and its starting end is 1 m younger than the cutting edge of the knife 12.
+14. It is formed into an arc circle or an inclined surface from the position moved in the direction of movement of the qi plate. 14 constituting the plate guide surface 13G
The pressure roller is disposed near the end of the guide surface 13G of the base 13, and is configured to be thin and rotatable using, for example, a mini bearing. They are arranged linearly or substantially linearly over the entire direction with separate rotational axes parallel to the cutting edge line of the cutter. Further, a pressure member 16 composed of a spring or a fluid cylinder or the like expands and contracts in the direction of arrow E, and constantly pressurizes and contacts the outer peripheral surface of a roller disk 23, which will be described later, either directly or indirectly through a single plate. The plate is driven to rotate in the direction of arrow C, which is the direction in which the plate is carried out. Therefore, the pressure roller 14
The arrangement in the width direction of the frustum of the cone is also arranged at the same position as the roller disk 23 as shown in FIG. 4 (X arrow view in FIG. 1). In some cases, the veneer V is placed in a position where it is placed in a position where it is in pressure contact with the disc indirectly through the veneer V to be cut and produced.In any case, the veneer V is regarded as a so-called driving conveyor belt. Then, the pressure roller is driven and rotated.

Furthermore, in response to changes in the species of raw wood, the width of the cut veneer, etc., the middle part (the middle part in the widthwise arrangement of the truncated cone) or the left and right ends of the pressure rollers can be thinned out and arranged as appropriate. is also possible. The pressure roller uses a pressure member such as a spring or a fluid cylinder, or the pressure member is omitted and the outer peripheral surface of the roller is coated with an elastic body such as rubber, so that the pressure roller itself has a pressure buffer. It is also possible to add an effect or increase the contact friction between the pressure roller and the veneer b1
Reference numeral 5 is a bracket for mounting the pressure roller, which has a built-in pressure member such as a spring and a fluid cylinder. This is the first time to remove the soba pressure roller. The relationship between the pressure rollers and the pressure member is such that the pressure rollers can be expanded and contracted simultaneously in the direction of arrow E using the same bracket 15 for each pressure roller, as shown in Figure a'7. In addition, each of the pressure rollers □ may be able to expand and contract independently in the direction of the arrow E using separate pressure members and brackets. In addition, the expansion and contraction action is achieved by turning the bracket 15 into an arm bracket that can swing in the direction of arrow E about the fulcrum shaft 15S as shown in the partially enlarged view of FIG. The pressure bar may be configured to be expandable and contractible in the direction of arrow E, which is a purely vertical direction.In this embodiment, the pressure bar is basically constructed by arranging the pressure bar in the L direction and the frustum in the F direction. The space between the F side of the body and the upper surface of the frustum serves as a conveyance path for the veneer to transport the cut veneer, so the pressure roller 14
Although the attachment of the pressurizing roller has depended exclusively on the truncated cone, it is also possible, for example, to suspend and hold the pressure roller from the vicinity of the left and right ends of the Bretzner bar body using arm brackets or the like.

Reference numeral 21 denotes a pressure bar body, which is generally placed on the upper part of the frustum 11 and held by a frustum guide (not shown) that clamps the left and right end surfaces together with the frustum. ) so that it can move forward and backward relative to the log 1. The side of the brake body 21 facing the raw wood has a plurality of short Is formed on an inclined surface of 21° and divided into sections.
Pressure bar 2 that is I-shaped or has multiple cutouts
The pressure bar is aligned in a straight line so that the tip of the F section thereof is parallel to the axis of the raw wood, and serves as a suppression part 22' for the raw wood. The second roller is a roller disc with a plurality of thin disc-shaped discs arranged in a skewer shape on a rotating shaft 24.
between the plurality of rectangular pressure bars; Alternatively, the roller disks 23 are arranged in a plurality of notches of the pressure bar and rotated in the direction of arrow B at an outer circumferential speed higher than the outer circumferential speed of the log 1 by a variable speed electric motor (not shown) or the like, and the outer circumferential surface of the roller disk 23 is usually Suppressing part 2 of Bretsun Yaver 22 on rotating log 1
Slightly from 2゛ in the direction of rotation of the raw wood, press the roller disk into contact with the outer circumferential surface of the log on the second hand, and on the other hand, the outer circumferential surface F of the roller disk is brought into contact with the second surface of the veneer V to be cut and produced. It is supported by Nge et al.

25 is a guide roller arranged near the F surface 21A of the pressure bar bottom 21. Like the pressure roller 14, the guide roller 25 is thin and has a good width, and a mini hair ring or the like is used.
Multiple pieces near the F side of the brake body through 1,
The axis of the roller is rotatable in the direction of the arrow, and the axis of the roller is aligned with the blade 1.
0 Kite roller 25 arranged parallel to the cutting edge line of No. 2
The major feature of this is that it is configured to move toward and away from the pressure roller 14 circumferentially or angularly by a forward and backward movement mechanism to be described later. This will be explained below using FIGS. 4 and 5 together. FIG. 4 is a view in the direction of the x arrow in FIG.
4, the bracket 15, the pressure member 16, and the guide roller 25 are omitted from the illustration for convenience.
1 and the eccentric cam 66, the others are omitted from illustration for the sake of convenience.

The guide roller 25 is moved by the pressure roller 14 by the advance/retreat mechanism 4.
In the illustrated embodiment, the advancing/retracting mechanism, which repeatedly moves toward and away from the object, is configured to move forward and backward in a substantially vertical direction by means of a bracket rocked by an eccentric cam. In the figure, the guide rollers 25 are each pivotally supported on one side of the bracket 51 and rotate in the direction of the arrow in contact with the upper surface of the veneer V. On the other hand, the bracket 61 is supported by a fulcrum shaft 62 approximately in the middle of its longitudinal direction. The other side of the bracket 31 that pivotally supports the roller 25, which is pivotally supported and can swing in the direction of arrow F, is constituted by a lever 36, and the lever 66 is constantly pulled upward by, for example, a spring 57. On the other hand, the lower surface of an eccentric cam 36 that rotates eccentrically contacts the upper surface of the lever 33, and controls the lifting action of the spring in both directions.The guide roller 25 is shown in FIG. As shown in the figure, normally one roller is held by one Braun I, and a plurality of rollers can be repeatedly approached and separated from the pressure roller 14 by each of a plurality of eccentric cams. It is configured,
The plurality of eccentric cams 56 are usually sequentially inserted through one co-rotating shaft 35 and rotated by, for example, an electric motor. As shown in FIG. 5, the mountings are arranged so that the eccentric positions of adjacent eccentric cams are shifted from each other. In other words, the a-t arrangement of the plurality of eccentric cups 36 and the rotating shafts that drive them is constructed just like a crankshaft. Therefore, the roller swings as indicated by arrow F, and swings from the position of the solid line shown in FIGS. 1, 2, and 6 to the position of the imaginary line. As shown in the partially enlarged views of FIGS. 2 and 6, the rocking motion of the roller is not shown as a solid line when the guide roller is closest to the pressure roller 14, but as shown in the single plate ■? p, the veneer ■ receives the most severe bending action in the direction opposite to the curl of the board, while in the state shown by the imaginary line, which is the farthest from the pressure roller, the veneer ψ hardly benefits from the above-mentioned bending action. The rocking motion of these guide rollers causes the pressure roller 14 to randomly move in the width direction of the pressure bar, that is, in the width direction of the strip-shaped veneer to be cut and produced. Since the veneer rotates freely while repeating approaches and separations, the produced veneer has short small cracks in its entire surface in the width direction. Therefore, the curled veneer is transformed into a flat, supple veneer without any curls due to the minute cracks. Incidentally, there is a device in which the guide roller 25 does not rotate eccentrically, for example, in Japanese Patent Application No. 56-17187 filed by the present applicant.
No. 6 (veneer lace curl removal device)
When the curled veneer passes through the idle roller, it is simultaneously subjected to a bending action in the width direction in the opposite direction to curling, but it is arranged perpendicular to the conveyance direction 1 of the veneer, that is, in a straight line in the direction of the wood fibers of the veneer. As a result, relatively long cracks (large □ cracks) are always formed along the fiber direction by the guide rollers, and the cracks widen during the drying process after the veneer lace stripping process, resulting in the entire width of the veneer being enlarged. This tends to cause cracks and breaks in the veneer, lowering the veneer yield. Looking at the present invention in turn, the cracks along the wood fiber direction are common, but because of the small cracks that are short in the width direction, although the JR board is flat and pliable, the cracks do not connect even after drying. This is rare, and the problems caused by cracks, cuts, etc. mentioned above can be eliminated.

In addition to the illustrated embodiment, the eccentric cam 66 may be an oval cam, a heart-shaped cam, a jumping cam, or the like.Furthermore, the guide roller 25 may be coated with an elastic material such as rubber on its outer circumferential surface so that it is not connected to a single plate. The contact friction may be increased.

The IJE roller 14 and the guide roller 25 form a plate passage with their opposing circumferential surfaces, and the gap between them is usually slightly wider than the thickness of the veneer to be cut, and depending on the situation, It is preferable that the guide roller 25 is set at several times the interval, and that the guide roller including the advance/retreat mechanism 30 of the guide roller 25 is integrated into a device that can move forward Vti in the direction of the arrow G in FIG. For example, in the illustrated embodiment, a simple method may be used in which an adjustment bracket or the like is provided to limit the swinging of the swinging bracket 31 in the F direction.

The guide roller advancing/retracting mechanism 60 is composed of the illustrated eccentric cam 36 spring 67, a rocking bracket, and an electric motor (not shown) that rotationally drives the eccentric cam. By combining a fluid cylinder and a solenoid valve, for example, a guide roller can be attached to the tip of the piston rod of an air cylinder,
There is also a method in which the action of approaching and separating from the pressure roller is performed in a substantially horizontal direction by reciprocating the cylinder arranged in a substantially horizontal state. Other link mechanisms and the like are also applicable.

Note that the movement of the guide rollers in the vertical direction narrows the veneer passage from the upper surface of the veneer to be cut when the separated guide rollers approach the pressure roller 14, resulting in less resistance to the veneer transfer. The plate passes through the passage surface smoothly.

□Also, the placement of the guide roller in the height direction requires pressure tJ
- It is preferable to arrange the guide roller 25 so that it is slightly F from the roller 14, and the pressure bar body 2
As shown in Fig. 4, the arrangement in the width direction of No. 1 (direction along the 111th line of the log) is sometimes arranged at the same position as the pressure roller. In response to changes in the wood species, the width of the cut veneer, etc., the pressure bar body 21 may be arranged by thinning out the center part in the width direction or the left and right ends. It is arranged so that it can move in the indicated G direction, and the approach and separation from the pressure roller 414 is an iTJ function, and the property of the veneer (l: Therefore, it is far away from the pressure roller 414.

Then, the veneer bending action for removing the curl of the veneer is released.

Note that the base 13, pressure roller 14, and pressure member 1 of the present invention
6. The device is configured by a combination of a roller disk 23 and a guide roller 25, and the device uses the roller disk 25, for example, an actual rotary disk with a large number of veneer protrusions on the outer circumferential surface, or an elastic body such as rubber on the outer circumferential surface. Even if it is replaced with a coated friction 0-RA disk, etc., by appropriately adjusting the peripheral speed of rotation of the disk, short cracks will occur in the width direction of the curled veneer that is cut, resulting in a flat and supple veneer. The effects of the so-called tenderizing process can be achieved in exactly the same way.

To explain the embodiment of the present invention detailed above, U of raw wood 1
The veneer V is cut from the log 1 by the tip 22° of the brensher bar 22 that presses the outer peripheral surface of the log by rolling, and the tip of the blade of the cutter 12, and the veneer V is cut from the log 1 to the veneer guide surface 13 of the production die 13.
The veneer reaches the pressure roller 14 through (), pushes the roller upward against the upward pressure force of the pressure member 16, and is held between the roller disc 23 and the pressure roller 13. At this time, the roller disk is being rotated at a peripheral speed that is 2 to 60% higher than the peripheral speed of the raw wood, and the cut portion between the blade tip of the blade 12 and the pressure roller 14 is transported to the flow F. Tip of plate V (veneer near the pressure roller)
The veneer V is pulled by the pinch roller effect of the seven-roller disk, and the veneer V is slightly stretched in the direction of conveyance, and preliminary tenderization is performed. Further, the veneer is transported, and the movement of the guide roller 25 by the advancing/retracting mechanism 30 is carried out while the veneer is gradually curved in the opposite direction to the curl by rotation with the action of approaching and separating the rollers. A complete tenderizing process, which produces countless short cracks in the width direction of the veneer without any defects, is carried out without any delay while cutting the veneer at 9 cuts and conveying it, resulting in a flat, supple, high-quality veneer without large cracks. This means that the board can be obtained at a high yield, and of course, a high-quality spout board that does not have stinging or the like on the clear board is obtained at the same time as cutting the raw wood.

Note that the roller disk 23 makes contact with the log suppression portion 22° of the brensher bar 22 in the direction of rotation of the log, and rotates at a peripheral speed faster than the circumferential speed of the log. When cutting logs with radial cracks such as dry cracks, in general veneer lace, the cracks are further accelerated by the cutting resistance of the cutter or pressure bar, and eventually develop into log destruction. It has the effect of pushing the cracked part into the cutting edge, and it is now possible to cut the veneer to the end without breaking the log while preventing cracks and destruction during veneer cutting. Furthermore, a large number of these roller disks that rotate at high circumferential speeds are arranged near the cutting edge and rotate at fast circumferential speeds, and the cleaning action around the cutting edge makes it possible to eliminate dust and thin veneer chips near the cutting edge. This veneer lace is extremely efficient compared to conventional veneer laces, as it prevents blade clogging due to build-up and dramatically improves the operating rate of veneer laces.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of one embodiment of the present invention, FIG. 2 is a partially enlarged side view of FIG. 1, FIG. 6 is a partially enlarged side view of another embodiment, and FIG. 4 is a side view of FIG. 5 is a view taken along the Y arrow in FIG. 1. FIG. 1 =−−one・−・・−・−・−・・−・−・−・・
−・Log wood 11・・・・・・−・・−・・・−・・−・
・・・・・・−・−・−Battery 12−・・・・−・−・−・
・・−・・−・・−Knife 16・・−・−・−
・・−・−・−・・−・・−・・Base 16G・−・−
...
・−・・−Pressure roller 15−−・−・・−・・・・−・
−・−・・−・−・−Bracket 16−・−・−・
・−・−・・−・−・−・・・・−・・−・Pressure member 21 −・−・−・・−・・−・−・−・・−−−
--- Pressure bar body 21A ---
・−・・−・−・−・−１−−−−−−・−・−Pressure bar body F side 22 ・・−・−・・−・・
−・−・−・・−・・Song Pressure Bar 23 ・
・・−・・−・−・・−・−・−・−・・・・・・・・
・−・−・−Rollertisf 24−・・・・−・−・
−・−・−・−・−・・−・−・・Rotating shaft 25・−・・
・−・Moaning−・・−・・−・・−・−・・ Ga・C troller 30−・・・・−・・−・−・−・−・−・・
......--...--Advancing/retracting mechanism 31...
−・・・・・・・・・−・・−１−−−−−・−・
・ Brakent 32・−・−・−−−−−−1・−・
−・−・・・−・・−・Fulcrum shaft 66 ・−・・−
・・−・−・−・−・・−・・−・・・−・−Lever 3
5 ・−・−・−・−・・・・−・−・・−・−・
−・−・−・Rotating shaft 36 ・・−・・−・・−・−・
・・・−・・−・・−・・−・・−・−・Eccentric cam 57
・−・・−・−・−・−・・−・−・−・−・−・・
−・ Spring v, v'−−−−−1−−・・−−−
1...---Top veneer board (hereinafter referred to as F margin)

Claims (1)

[Claims] 1. In a veneer race for cutting veneer from raw wood, a blade is placed in front of the frustum with the cutting edge facing upward, and a base having a veneer guide surface is provided parallel to the blade, and A truncated cone having a plurality of pressure openings arranged near the end of the veneer guide surface and a pressure member of the pressure roller, and a pressure bar divided into a plurality of parts or having a plurality of notches. S A pressure bar body consisting of a plurality of disc-shaped roller discs arranged so that their outer peripheral surfaces can contact both the outer peripheral surface of the raw wood and the cut veneer is placed above the frustum, and the pressure roller A veneer veneer curl removal device for veneer lace, characterized by having a plurality of guide rollers that repeatedly approach and separate from each other, and a mechanism for advancing and retracting the guide rollers. 2. The veneer curl removal device for veneer lace according to claim 1, wherein the roller disk is driven at an outer circumferential speed faster than the outer circumferential speed of the log. 6. Claim 1, characterized in that the plurality of roller disks and the rotating shaft of the roller disk are constructed as one body.
A veneer curl removal device for veneer lace according to item 1 or 2. 4. The device for removing curls from a veneer lace according to any one of claims 1 to 6, wherein the pressure member of the pressure roller is constituted by a spring. 5. Claims 1 to 6, characterized in that the pressure member of the pressure roller is constituted by a fluid cylinder.
A veneer curl removal device for veneer lace according to any one of Items 1 to 9. 6. A device for removing curls from a veneer lace veneer according to any one of claims 1 to 5, wherein the pressure roller has an outer peripheral surface coated with a neutral material such as rubber. . The veneer lace according to any one of claims 1 to 6, wherein the Z pressure roller is arranged at the same position as the roller disk in the width direction of the frustum. veneer curl removal device. 8. The veneer lace according to any one of claims 1 to 6, characterized in that the pressure rollers are arranged at positions that dodge the roller discs in the width direction of the fishing platform. Veneer curl removal device. 9. Any one of claims 1 to 8, wherein the pressure roller and/or the guide roller are partially omitted from the arrangement in the width direction of the fishing platform or pressure bar body. 11X in veneer lace as described in Section 1, and a device for removing curls from the board. 10. Curl removal from a veneer lace in a veneer lace according to any one of claims 1 to 9, wherein the guide roller advancing and retreating mechanism is constituted by a swinging bracket and an eccentric cam. Device. 11. Claim 1, characterized in that the guide roller advancing/retracting mechanism is constituted by a solenoid valve and a fluid ring.
A device for removing curls from a veneer lace according to any one of Items 1 to 9 above. 12 The guide roller is characterized by a 1f whose outer peripheral surface is coated with an elastic body such as rubber.
Which of item 1 is li in the veneer lace described in item 1
Board decurling device. 13. The advancing and retreating mechanism of the guide roller is characterized in that the kite roller is advanced and retreated in a substantially vertical direction. removal device. 14 The guide roller advancement and retreat mechanism makes the guide roller a great choice.
Any one of the claims characterized in that the invention moves forward and backward in the 'direction.' Can I use the veneer lace described in items 1 to 12? R board curl removal device. (below F margin)