JPS5876205A - Device for removing curl of veneer in veneer lath - 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 lace that cuts a wide thin veneer veneer using a cutting blade extending over the entire length of the log while holding and rotating the right and left sides of the log. Recently, plywood factories have been making efforts to reduce the cost of raw wood, which accounts for most of the cost of plywood products, as well as labor costs, in response to the deterioration of the raw wood situation and the aim of reducing plywood manufacturing costs. Therefore, the raw wood has become oriented toward low-grade raw wood with the lowest unit price, and there has also been a demand for a high-speed, direct-coupled production line using a conveyor system that saves manpower. As a result, the problem with veneer lace, which is placed at the head of the plywood production line, is that in order to process the veneer using various devices on the line directly connected to the conveyor, it is necessary to produce flat, smooth veneer veneer at high speed and at low quality. The demand for cutting from logs has increased.

A veneer cut from a conventional veneer lace is transported by a conveyor or the like in a curled state due to the so-called curl phenomenon, in which the veneer curves in the L direction due to stress during cutting. Therefore, when the veneer is inserted into the next process, such as a cutting machine, it takes time and effort to manually turn the veneer upside down and cut it, and since the veneer is in a curved state, it is difficult to cut the veneer into a conveyor belt. This caused various problems, such as the degree of contact between the left and right sides being unbalanced, resulting in the items being conveyed in a meandering manner instead of straight. As a means to remove the curls in the veneer that cause these problems, there is a method of installing a tenderizing device at an appropriate location during the conveyance process, but this method requires the aforementioned human labor to mediate the veneer to the tenderizing device. It was disadvantageous because the cost of new construction increased.

The present invention uses a veneer lace to perform the veneer cutting and tenderizing process in the heavy board manufacturing process of cutting block-shaped logs into thin veneers, and implements an efficient tendering device using an extremely compact device. It is.

An embodiment of the present invention will now be described in detail with reference to the drawings.

Figures 1 and 2 are side sectional views showing the mode of cutting a veneer in the vicinity of the cutting edge. ] Reference numeral 1 denotes a wood log serving as a raw material, which is rotated in the direction of arrow A with its left and right grain end faces held between known left and right spindles of veneer lace (not shown). Reference numeral 1 denotes a cannon turret, which has a substantially triangular cross-section, for example, and has a cutting blade 2 whose cutting edge is set to F, and a predetermined blade height is maintained by a blade holder 3 such as a hydraulic device or a clamp bolt on the side facing the log. It is held tight. The back side of the side of the turret l that faces the raw wood (the mounting surface of the cutter 2) is configured with a steep slope, and serves as an ejection path 4 for the veneer P to be cut and manufactured. A mouthpiece 5 made of a material such as stainless steel is arranged on the surface of the gun turret 1 in contact with the blade 2 over the entire length of the blade 2. At the top of the die 5, an arcuate or inclined linear guide surface a is formed, which serves as a passage for the veneer P cut from the log 11 to be produced. Reference numeral 5' designates another thin die disposed adjacent to the die 5 on the F side in the veneer delivery direction. Incidentally, the cap 5' may be constructed integrally with the cap 5, but since this part is subject to a lot of wear and tear, it is more advantageous in terms of maintenance and the like to arrange it as a separate component from the cap 5. In addition, the guide surface G at the top of the mouthpiece 5 starts at a position that is 1 or more backward from the cutting edge of the cutter 2 in the veneer unloading direction, and the rotary body 1, which will be described later.
The base 5', which is formed in an elliptical arc shape similar to the outer circumferential circle of the base 5, or an inclined surface gradually approaching the lower outer circumferential surface J of the vertical center line of the rotating body, has a base 5' on the top thereof. A curved portion H is formed starting at or near the terminal end of the guide surface G. It should be noted that a similar configuration will be obtained when the caps 5 and 5' are integrally configured. and the curved portion H
As shown in FIG. 911, is formed into an intricate shape by wrapping up and down over a certain distance from the lower outer circumferential surface J of the rotating body 15, and is an arcuate circle similar to the outer circumferential circle of the rotating body 15, or It is formed as a linear inclined surface or the like close to the outer circumferential surface J. Note that the curved portion H is -L as in the embodiment shown in Fig. 911.
Curve the cedar along the outer circumferential surface J with a slight gap between the lower outer circumferential surface J of the rotary body 15 or the outer circumferential direction J and the curved portion H without wrapping in the direction. Even with the partial arrangement, it is possible to produce the curvature effect described below depending on the thickness of the veneer P that passes through the face.

In this case, since the thickness of the veneer to be cut and transported is affected as described above, it is sufficient for the base 5 to be a device that can adjust the distance in the upper F direction of the curved part H. Further, it is best to configure the veneer to be able to move in and out of the conveyance path of the veneer by providing, for example, an advancing/retreating or elevating mechanism, such as separating the curved portion H from the outer circumferential surface J within a range that does not cause the curving action described below. Furthermore, the base 5 may be configured as a single piece that spans the entire width of the turret 1 (in the longitudinal direction of the log 11), or may be arranged in a divided form with α number, or with the middle part in the width direction or the left and right ends omitted as appropriate. good. In addition, the cap 5 is a narrow member that is divided and arranged in all the gaps between the rotary bodies 15 arranged in a skewer shape (to be described later), or it can be arranged by omitting the middle part or the right and left ends as appropriate. Furthermore, it is also possible to form the entire gun turret into a single piece and have the curved portion H provided in the piece as appropriate in accordance with the above-mentioned split type. In another embodiment, the guide surface G of the cap 5 and the curved portion H of the cap 5'
In some cases, a small-diameter roller 5R that rotates at the same time is provided, or the opening @ 5' is replaced with only a rotating roller to increase the smoothness of conveyance of the veneer. Reference numeral 6 denotes a pressure bar body, which is placed above the gun turret 1 in a normal veneer race, and whose left and right ends are integrally held together with the gun turret 1 by a turret guide (not shown), and for example, a feed screw (
(not shown), etc., so that it can rapidly approach or separate from the log 11. When cutting a veneer, the device moves forward toward the log by the thickness of the cutting board per one rotation of the log 11. In addition, the side facing the log 11 is an inclined surface 6', and the pressure bar 7 that is raised and lowered along the slope is a pressure / (- width direction (longitudinal direction of the log).
There are multiple locations. 8 is the lower surface of the pressure bar body, which is formed at an angle of inclination of about 30° with respect to the conventionally known water) P surface, and the portion of the veneer P that collides with the inclined surface is
A wear-resistant plate (720) is attached.

15 is a rotating body, which has a plurality of relatively thin disk-shaped rotating bodies;
A plurality of the disc-shaped rotating bodies are arranged in the gap between the pressure bars 7 whose number of bales are recorded in IJl, and the rotating shaft 14
The rotating body 15 is mounted in a skewer shape and is supported on the pressure bar body by a bearing (not shown) or the like. The outer circumferential surface of the rotating body 15 is adjusted to JJ with respect to the raw wood 11 by interposing a pressurizing buffer mechanism, such as a fluid cylinder (not shown), capable of retracting dM in the direction of
There are also examples where the pressure is maintained at a moderate level. Furthermore, rotating body 1
The outer circumferential surface of 5 is arranged at a position where it can hit the outer circumferential surface of the log 11 and the veneer P cut from the log 11, and the outer circumferential surface J of the f section is intricately connected to the curved portion H of the eye metal 5' described above. It will be placed. The outer circumferential surface of the rotating body 15 is normally formed into a flat outer surface and is driven to rotate by a drive device (not shown) at an outer circumferential speed that is 2 to 25% faster than the outer circumferential speed of the raw wood. The outer periphery of the rotating body 15 may be improved by providing protrusions or convex undulations on the outer circumferential surface of the rotating body 15, or by drilling a plurality of slits radially from the axis of the rotating body to the outer circumferential surface. The frictional force between the surface and the veneer P may be increased, and sharp protrusions may also be placed on the outer circumferential surface of the rotating body. In this case, the difference in the outer circumferential speed of the monkey rotating body and the log will be negligible. Become.

Furthermore, the rotary drive of each oak type of the rotary body may be omitted and driven rotation from the outer circumferential surface of the raw wood may be used, which is suitable for the case of the stabbing rotary body described later.

Figure 1 of the spear is a side sectional view where the cross section extends to the cap 5', and Figure 2 of the spear is a side sectional view where the cross section is removed from the cap 5'. Next, Figure 3 shows another actual example of a pressure bar body in which the slope of the bottom IIIT 8 of the pressure bar body 6 has been moved upward and the heart of the cedar has been widened ~ the first slope of the bottom surface 8 has also become steep. In addition, the distance of the curved portion H of the u-shape 5' is also approximately twice as long as that in Figure 1.

The embodiment shown in Figure 2 has a wide opening, which is advantageous in terms of maintenance and inspection, and in preventing clogging of the veneer. The 4th figure of spear is; 171
In the X-arrow view in the figure, for convenience, parts other than the base 5' and the rotating body 15 are omitted from the drawing to represent the arrangement of the members in the width direction of the gun turret. In the case of Figure 4, it is an example in which a base 5' and a roller 5R are arranged for every two rotating bodies 15, and the veneer P is crouched in one corner direction as shown by the imaginary line. To explain the practical aspect of one embodiment of the present invention in the configuration in which it advances in the unloading direction, arrow A
The log 11 rotated in the direction is peeled off from the outer circumferential surface of the log as a veneer P while the thickness is regulated by the blade 2 over its entire length and the pressure bar 7. It slides down while rubbing against surface G.
Subsequently, the veneer approaches the base 5', and the veneer passes through the rotating outer surface 1 of the rotating body 15 in the veneer conveyance path formed by the curved part H of the lower base 5' and the lower outer circumferential surface J of the rotating body 15 on the L side.
74 and is transported along the conveyance path. In the conveyance path, as shown in Figure 4, the curved portion H and the lower outer peripheral surface J are intricately arranged in the height direction, It will be forcibly curved into a waveform in the direction. This bending phenomenon in the direction of the fibers of the veneer results in stiffness in the direction perpendicular to the fibers of the veneer, that is, in the direction in which the veneer advances; Approximately horizontal direction (depending on the degree of arc or inclination of the curved part H of the cap 5')
It is driven straight forward and collides with the front face 8 of the pressure bar body 6 that is waiting in front. Since the lower surface is formed into a single slope following the direction of veneer movement, it is forced to bend in the F direction at the same time as the veneer collides, causing the curved direction of the veneer to curl. It is curved in the opposite direction, causing countless surface cracks that correspond to the back cracks of the veneer.
As a result, the veneer is flat and smooth due to the average thin cracks from both the front and back sides, and is continuously carried out of the machine while falling naturally into the carry-out path 47 of each car. In other words, the principle of the present invention is to provide rigidity in the direction perpendicular to the fibers of the veneer, which is weak due to the nature of the veneer, to induce instantaneous collision bending, and to generate appropriate cracks in the structure. The mttF4 is a simple and extremely efficient tender process. In addition, in the case of Punky wood, which has a fragile wood part, the veneer itself will come apart during the tendering process, so it is necessary to bypass the tenderizing device as appropriate.According to the present invention, the Punky wood can be The bending phenomenon when the conveyance path bends is minute, and the sheets are conveyed vertically F to the unloading path 4 before colliding and bending, and no ψ plate wear occurs.

[Brief explanation of drawings]

Figure 1 and Figure 2 are side sectional views, Figure 3 is a side sectional view of another embodiment, and Figure 4 is a view taken in the direction of the x arrow in Figure 1. １・・・・・・・・・・・・・・・One machine 2 、．． 1. ,,,,,,,,,, Knife 3
,,,,,,,,,,,,,, Blade holder 4...
・・・・・・・・・・・・ Export path 5.5 ,,,,,
,,,,,, ,,, Base 6 ,,,,,
,,,,,,,,, Pressure bar body = 7
,,,,,,,,,,,,, Pressure bar 1
1......Log 14...
,,,,,,,,,, Rotating shaft 15 ,,,,,,,
,',,,,,,,Rotating body G,,1. ,,,
,,,,,,, Guide surface H,,,,,,,,',,
,,, curved part, r ,,,,,,,',,,,
,, Lower outer peripheral surface p 0.1. ,,,,,,,,,
, veneer L

Claims (1)

[Claims] 1. In a veneer lace for cutting veneers from logs, a disk-shaped rotating body is provided with multiple pressure pars and whose outer peripheral surface is in contact with the logs and the cut veneer, and is shaped into an mth skewer. and a pressure par body disposed between the pressure pars and having an inclined bottom surface. A cannon turret comprising a blade for cutting a veneer and a mouthpiece having a veneer guide surface, and in which the mouthpiece having a veneer curved part is arranged intricately with the rotating body. A veneer comprising: a drive device for the rotary body, wherein the veneer after cutting is conveyed while being curved in the @i force direction in a conveyance path for the veneer constituted by the rotary body and the curved part of the base. Curl removal device for veneer in lace. 2. The drive device of the rotating body is 2 to 25% faster than the outer peripheral speed of the log.
A veneer curl removal device for a veneer lace according to claim iy1, characterized in that the rotating body is driven at a high peripheral speed. 3. The device for removing curls from a veneer lace according to claim 1, wherein the rotating body does not include a driving device. 4. A veneer curl removal device for a veneer lace according to any one of claims 1 to 3, wherein the @ rolling body is configured in the shape of a disk with a flat outer peripheral surface. . 5. The device for removing curls from a veneer lace according to any one of claims 171 to 4, wherein the rotating body has a plurality of radially formed slits. 6. Claims 1 to 3, characterized in that the rotating body has protrusions or uneven undulations on its outer peripheral surface.
A device for removing curls from a veneer lace according to any one of the above items. 7. The veneer lace according to any one of claims 1 to 6 of the patent claim, characterized in that a rolling roller is arranged to follow the curved part of the base that constitutes the conveyance path of the veneer. A device for removing curls from veneers. 8. A unit in the plywood lace set forth in any one of claims 1 to 7, characterized in that the caps arranged in separate parts are arranged with some parts omitted as appropriate. Board decurling device. 9. A device for removing curls from a veneer lace according to any one of claims 1 to 18, wherein the rotating body is held by a pressure buffer mechanism. 10. In veneer lace cutting Gakkari from raw wood,
A pressure bar body comprising a plurality of pressure bars, a plurality of small rotary bodies whose outer peripheries are in contact with logs and a cut heavy board, arranged between the pressure bars and the pressure bars, and having an inclined bottom surface. A mouthpiece having a blade i for cutting a veneer and a veneer guiding surface, a mouthpiece having a veneer curved part arranged intricately with the rotating body, and a lifting mechanism for the mouthpiece having a veneer curved part. with a gun battery. and a drive device for the rotary body, and is characterized in that the cut veneer is curved in one direction and conveyed in the veneer conveyance path constituted by the rotary body and the curved part of the mouthpiece. A device for removing curls from veneer lace. 11. The driving device of the rotating body is 2~
The device for removing curls from a veneer lace according to claim 10, characterized in that the rotating body is driven at a peripheral speed 25% faster. 12. A device for removing curls from a veneer lace according to claim 10, wherein the rotating body does not include a driving device. 13. A single plate car in a veneer lace according to any one of claims 10 to 12, wherein the rotating body has an outer circumferential surface formed in the shape of a disc.
Le removal device. 14. The rotating body has a plurality of radial slits 1f: Items 10 to 13 of the characterized claims
A veneer curl removal device for veneer lace according to any one of Items 1 to 9. 15. A veneer lace in a veneer lace according to any one of claims 0 to 12, wherein the rotating body has a protrusion or uneven undulations on its outer peripheral surface. Curl removal device. 16. Any one of claims iii to 15, characterized in that the curved portion of the base constituting the veneer conveyance path is disposed at approximately the same level or lower than the lower outer circumferential surface of the rotating body. A veneer curl removal device for veneer lace described in . 17. In the veneer lace according to any one of claims 10 to 16, which is characterized in that a roller that rotates as a result of the curved part of the base constituting the conveyance path of the veneer is arranged. Veneer curl removal device. 18. The veneer lace according to any one of claims 10 to 17, characterized in that parts of the separately arranged caps are appropriately omitted. Curl removal device. 19. A device for removing curls from a veneer lace as set forth in any one of claims 10 to 18, wherein the rotating body is held by a pressure buffer mechanism. (below F margin)