JPS59106907A - Line ruling device for 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 involves holding and rotating the left and right butt end surfaces of a raw wood log, and then cutting a long blade equal to the length of the log into the outer circumferential surface of the log by a predetermined amount. This invention relates to a so-called width-determining scoring device that is hung on a veneer race for cutting a relatively thin, wide sheet-like veneer veneer to regulate the width of the veneer to be turned.

A typical creasing device for veneer lace that has been used in the past is Utility Model Publication No. 34-15795 (Ruling device for wood peeling machine), that is, a creasing device that holds the creasing blade 10. Blade guiding member A1. A2, A3, etc. are installed on the inclined surface facing the raw wood 4 of the pressure bar 1 (more precisely, the pressure bar body 1 equipped with a pressure bar tip), and are adjusted to correspond to the specified width of the veneer as appropriate. The guide member is positioned using the sizing blade 10, and the scoring blade 10 is placed on the outer circumferential surface of the raw wood near the cutting edge of the fishing force 3 for cutting veneer (the gap between the cutting edge and the tip of the pressure bar is generally referred to as the cutting edge). This method determines the width of the raw wood before it is peeled into veneer using a fishing force of 3. When raw wood with cuts made at predetermined intervals on its outer circumferential surface is turned into thin veneers, it is divided into predetermined widths by the cuts and separated. Therefore, the cut, ie, the actual depth of the cutting blade 10 into the raw wood, is at least small, and the cut is made to a depth that is greater than the thickness of the veneer to be cut.

Next, to explain the actual situation of cutting veneer from raw wood, first peeling the raw wood with unevenness on the outer circumferential surface is to cut a relatively thick veneer (referred to as rough peeling). It is used for the middle board of the product, and when the raw wood reaches a nearly perfect circle state, it is cut into relatively thin veneers (called hon-kiri) and used for the front and back boards of plywood products. When the wood reaches the vicinity of the core of the log, the material generally becomes brittle and is peeled thickly again (called core peeling) to obtain the veneer for the middle board. It is customary to perform turning by changing the thickness and also changing the scoring dimension each time.

In the above-mentioned situation of cutting a veneer from raw wood, the conventional scoring device had the following defects.

1. Since the cutting edge is cut perpendicular to the wood fibers using a scribing knife that fixes the outer circumferential surface of the raw wood, a large amount of wood powder, wood chips, etc. are generated and adhere to the pressure bar, clogging the cutting edge, resulting in work interruptions, etc. The operating rate decreases due to writing.

2. When the cutting edge is opened on the outer surface of the log, the cutting edge swings arbitrarily due to the knots and other hard and soft wood parts, leading to breakage of the cutter.

3. If the cutting blade is moved in the axial direction 1 of the log for width adjustment etc. with the cutting blade open on the log, the cutting edge will bend and break immediately.

4. Since the pressure bar is installed in front of the pressure bar, there is a risk of splashing salt water from raw wood containing a large amount of water that is being rotatably cut at high speed, or from sudden bag frames during rotary cutting of logs with many cracks. Collisions of log fragments in the volume may occur, and in order to protect the device, the structure itself must be made strong or it must be covered with one protective cover, resulting in a device that is more than necessary.

5. Since the creasing blade is actually opened to a depth greater than the thickness of the veneer in the raw wood state, when transitioning from rough peeling to regular peeling, scars from cutting the thick veneer remain, resulting in a veneer that cannot be manufactured into a product. production, resulting in lower yields.

The present application eliminates the above-mentioned defects by installing the scoring blade device, which was conventionally installed on the front surface of the pressure bar body, in the vicinity of the bottom of the pressure bar body so that it can appear and retract freely, thereby stopping the cutting of fruit into logs and increasing the fishing force. The width is determined on the veneer immediately after it has been cut.

This will be explained below with reference to the drawings. FIG. 1 is a side view of the embodiment. L indicates a log serving as a raw material, which is held by a spindle (not shown) at its left and right end faces and rotated in the direction of arrow A. Reference numeral 11 denotes a gun turret, which generally has a triangular cross section, and has a cutting tool 12 for cutting a veneer at the top end thereof, which is tightly held with the cutting edge facing upward. 13 is a base made of stainless steel, etc., and a cutter 12
It is attached to the tip of the fishing platform over the entire length of the log (comparable to the length of logs). Further, if necessary, a narrow slit, which will be described later, is provided on the back surface.

Reference numeral 21 denotes a pressure bar body, which is often of the tubular type with a square cross section.It is placed on the fishing stand 11, and the gun stand 11 and the pressure bar body 21 are integrated into one body by a feeding mechanism (not shown in the figure), and are moved toward the log. It moves forward in the direction of arrow B. Note that the amount of advancement is configured such that it advances by the required thickness of the cut veneer for one revolution of the log.

A pressure bar 22 is tightly held at the front end of the pressure bar body. The pressure bar is in contact with the outer peripheral surface of the log near the cutting edge of the knife 12 to regulate the thickness of the veneer to be cut and to prepare the surface of the veneer. Therefore, the veneer V is produced from the gap between the tip of the veneer cutting blade 12 and the tip of the pressure bar 22 in the direction of arrow C, and the veneer is continuously drawn out from the so-called cutting edge. A front block member 23 forms the front surface of the pressure bar body, and is fixed to the pressure bar body 21 with bolts or the like to form an integral structure.

Reference numeral 40 denotes a scoring device, which is installed on a substantially horizontal mounting seat 24 provided below and near the pressure bar 22 mounting position of the pressure bar body 21, and includes a scoring blade 31, a scoring stand 41,
and a swinging mechanism 43 for the marking board, and the swinging mechanism for the marking board is, for example, a fluid cylinder 43C.
It is composed of a base 43B, a base 435, and the like.

The mounting seat 24 of the scoring device is provided approximately horizontally in a space drilled at a plurality of locations below the pressure bar and along the longitudinal direction of the pressure bar. It is arranged so as to be slidable in the axial direction of the log through the dovetail groove.

The swinging mechanism 43 is configured to swing the marking table 41 once in the direction of the arrow, and to freely move the marking blade 31 in and out of the vicinity of the lower surface of the pressure bar body. FIG. 1 shows an embodiment of a fluid cylinder. ing. The fluid cylinder 43C connects its cylinder end to the base shaft 43 via the base shaft 43S.
It is rotatably supported by B.

The pivot base 43B is slidably installed in a dovetail groove or the like drilled in the mounting seat 24, and after positioning the cylinders installed at multiple locations on the pressure bar body at predetermined intervals, is fixed with appropriate bolts or the like. . 43B is a pivot base that pivotally supports a suspended pivot 43S over the movement range of the fluid cylinder 43C of the swing mechanism, and is attached to the mounting seat 24. The base shaft base 43B is fixedly installed on the mounting seat 24 by supporting the left and right shaft ends of the base shaft 43S installed in the range of movement of the creasing blade, and only the fluid cylinder 43G can slide left and right on this shaft. It may be configured to move. 41S is a fulcrum shaft rotatably supported in front of the mounting seat 24, and like the base shaft 43S, it is suspended over the movement range of the scoring blade.

j; The fulcrum shaft 41 Sh has the marking table 41 and a swinging arm (arranged on the back side of the marking table 41 in FIG. 1, a part of which is visible) being pivoted. The tip of a piston rod of a fluid cylinder 43C of the swing mechanism is locked to the tip of the swing arm, and the fulcrum shaft 41S rotates as the cylinder piston rod moves back and forth.

Figure 2 is a detailed view of the creasing table that swings while holding the creasing blade (
Al is a side view, and IBI is a front view.

The scoring table 41 has a boss portion 41B secured to a fulcrum shaft 41S, and the scoring blade 31 is loaded into the groove 41G by pushing the cutting edge downward. Accordingly, as the shaft rotates, the scoring blade 31 swings in the direction of the arrow in FIG. The marking blade 31 is attached to the marking table 41 as shown in FIG.
It is desirable to arrange the blade so that when the blade is swung downward, the gap between the cutting edge and the back surface of the cutting board gradually decreases along the veneer delivery direction. In other words, it is best to arrange the cutting edge line so that the cutting edge line is inclined so that the cut of the scoring blade becomes deeper as the veneer V is cut out from raw wood and transported.

Furthermore, since the fear of the scoring blade being swung in the thickness direction has been eliminated, it is also possible to use a commercially available cutter knife or the like.

In addition to the fluid cylinder shown in FIG. 1, the swing mechanism 40 may also employ a cam or other appropriate mechanism. Furthermore, if the shape of the pressure bar body 21 has a downward bulge as shown in FIG. , when there is no downward bulge, etc., the device 40 is suspended near the bottom of the rasher bar body, and the device is properly covered with a protective cover etc. so as not to obstruct the conveyance of the veneer V. It is hidden.

Furthermore, the base 13, which serves as a receiving blade for the scoring blade 31, is provided with a slit of an appropriate width on its veneer conveyance surface, or a recessed groove of an appropriate width, and a block of wood to be fitted into the part is buried. A cut may be made directly on the block using the scoring blade 31, or a relatively soft aluminum alloy plate or the like may be attached in correspondence with the cutting tool.

The scoring device 40 with the above configuration is installed at multiple locations in the width direction of the veneer (the axial direction of the log and also the longitudinal direction of the pressure bar) (generally near both left and right ends of the log and near the center). It will be deployed at three locations.

To explain the embodiment with the above configuration, when each creasing device is swung downward by the swinging mechanism at the start of log cutting, the point 31E of the creasing blade 31 is aligned with the back surface of the mouthpiece 13 or the back surface of the turret. Set it just before it touches the surface. If a slit or the like is formed on the back surface of the mouthpiece, advance the blade to such an extent that the tip of the blade is slightly buried in the groove.

Next, after adjusting and positioning the distance between the left and right edges and the center scoring blade for rough stripping at the beginning of cutting, the swing mechanism is moved down, and the log is then rotated in the direction of arrow A. Veneer cutting is started by the veneer cutting blade 12, and the cut veneer (2) is urged by the driving force of rotation of the log immediately after cutting, is vigorously discharged from the blade mouth, and passes through the scoring blade 31. When the creasing blade passes through the veneer, especially if the interval between the creasing blade and the base is gradually reduced, the cuts made by the blade in the veneer become deeper as the veneer progresses, so the chain can be removed very smoothly. will pass through. Therefore, the veneer is cut into three strips and cut to a predetermined width. The veneer continues to rub against the back surface of the turret 11 and slide down in the direction of arrow C, and is transported to a predetermined position by a subsequent device such as a conveyor.

If you then change the thickness of the veneer and proceed to regular peeling, center scoring is generally not necessary. Therefore, the central marking device is moved upward by the swinging mechanism, and the pre-lasher bar body 21
The board is buried upward from the bottom surface, and two cuts are made in the same manner as above using the scoring devices at the left and right ends. Also, when peeling the heart, the ruling blade in the center of the sword is advanced and three cuts are made.

As described above, the present invention provides the following advantages.

1. The cut into the veneer by the scoring device is made after passing through the cutting edge, and the generated wood chips, wood powder, etc. are placed on the cut veneer and are quickly transferred, so troubles such as cutting edge clogging do not occur. .

2. This is a cut after the veneer has been formed, and the cutting edge will not swing from side to side due to the partial hardness and softness of the raw wood.

3. Since the cutter does not cut into the log, the log can be moved freely in the axial direction at any time, regardless of the creasing device.

4. There is no risk of collisions due to log damage or salt water flooding, and the equipment can be made compact.

5. Even when changing the thickness of the cut veneer, no scars remain, improving yield.

6. For example, a creasing knife gradually increases the number of cuts, which improves sharpness and increases the operating rate.

As described above, a marking device with high practical value has been realized using extremely simple means.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention. FIG. 2 is a detailed view of the marking table. 11 ...φ... Planer stand 12 ・
... Fist - Φ ... Cutting tool for cutting veneer 13 - ...
・・・・・・・・・Base 21 φ・・・−・Φ・・
...Pressure bar body 22 -e...
・Fist e・-e pressure bar 24 ・・・・・・・・・
・11・Mounting seat 31 ・・・・・・・・・・・・Critical blade 40 ・・・・・・・・・・・・・Critical device 41
・・・・・・・・・・・・ Rule drawing stand 41 S...
......Fulcrum shaft 43...
...Rocking mechanism 43 B......
・Basic shaft base 43C...1...Fist fluid cylinder 43S.......Beyond the basic shaft
Top 15-

Claims (1)

[Scope of Claims] 1. A veneer race for cutting veneer from logs is equipped with a turret for tightly holding a blade for cutting veneer with the cutting edge facing upward, a pressure bar at the tip, and a swinging mechanism. A pressure bar body is disposed above the turret, and the pressure bar body is equipped with a creasing blade that approaches or moves away from the cut veneer, and the swinging mechanism and the creasing mechanism are arranged near the lower side. A device for marking the veneer of veneer lace. 2. The veneer lace creasing device for veneer lace according to claim 1, wherein the swinging mechanism of the creasing device is constituted by a fluid cylinder. 3. A veneer lace scoring device for a veneer lace according to claim 1 or 2, characterized in that a slit is bored in the back of the turret or in the mouthpiece to engage with the scoring blade. (Margin below)