JPS6310246Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a veneer lace that can be subjected to a tender treatment on a cut veneer veneer (hereinafter referred to as veneer).

[Problems to be solved by the prior art and the invention]

Conventionally, this tool is equipped with a rotating body having a large number of cutting blades that pierce the outer peripheral surface of raw wood and/or the upper surface of a cut veneer to form small cracks, to correct curling caused by back cracks that occur when cutting the veneer. As a veneer lace, JP-A-53-103300 (Cutting device to prevent curling of veneer lace), JP-A-53-103300
No. 122199/Japanese Patent Application Publication No. 1984-298/Japanese Patent Application Publication No. 1973-15599
No. 122495/1988/139197 (Veneer lace), 96897/1989 (Method for cutting logs for veneer lace)
No. 111198 (rotary lace), Japanese Patent Publication No. 1983-
No. 122497 (Method and apparatus for tenderizing cut veneer in veneer lace), JP-A-1972-
No. 136795 (veneer veneer cutting device), Japanese Patent Application Publication No. 1973-
No. 135203 (veneer tenderizing device for veneer lace), Japanese Patent Application Laid-Open No. 107599 (1982) (veneer cutting method), etc. are generally known.

If the cutting edge 6A of each rotating body faces in the radial direction as shown in FIG.
By A, the fibers on the front and back sides of the piercing position are spread out almost uniformly to form small cracks, and as shown in B of the same figure, when the cutting blade 6B faces in the rotational direction with respect to the radial direction, the cutting blade 6B , the fibers on the rear side of the puncture position are spread apart to form small cracks, and furthermore, when the cutting blade 6C faces in the direction opposite to the rotational direction with respect to the radial direction, as shown in Figure C, the cutting blade 6C The fibers in front of the puncture position are pushed apart to form small cracks. However, in any of the above cases, the cutting edges of each rotating body are arranged so as to face the same direction, so
A large number of small cracks are formed in accordance with the depth of cut of the cutting blade or the angle of the cutting edge so as to continue in the direction of the fibers, regardless of the strength of the fibers to be pierced.

[Purpose of invention]

The purpose of the present invention is to take into account the above-mentioned drawbacks of the conventional technology.
By appropriately combining a rotating body with a cutting edge whose cutting edge faces in the direction of rotation relative to the radial direction, and a rotating body with a cutting edge whose cutting edge faces in the direction opposite to the direction of rotation with respect to the radial direction, small cracks can be eliminated from the fibers. To provide a veneer lace that can effectively correct curling while preventing the veneer from becoming continuous in the direction and preventing the veneer from becoming excessively brittle.

[Means to solve the problem]

Therefore, in the present invention, the outer circumferential surface of the raw wood and/or
Or a veneer lace that has a large number of cutting blades that pierce the carved veneer, and has a number of rotating bodies that are rotatably supported as the wood rotates and are spaced at required intervals toward the core of the wood. In this method, a rotating body having a cutting edge whose cutting edge faces in a direction of rotation with respect to a radial direction, and a rotating body having a cutting edge whose cutting edge faces in a direction opposite to the rotational direction with respect to a radial direction are combined into a veneer to be cut. A veneer lace is constructed by appropriately combining and arranging the fibers according to the fiber bonding strength of the fibers.

[Effect of invention]

Since the present invention is configured as described above, when a large number of rotating bodies come into contact with the outer circumferential surface of the rotating log and/or the top surface of the cut veneer and the cutting blades pierce, the cutting edges are directed in the radial direction. The fibers of the raw wood and/or veneer on the opposite side of the rotational direction from the piercing position are pressed by the cutting blade facing in the rotational direction, forming small cracks, and the cutting edge is oriented in the opposite direction to the rotational direction with respect to the radial direction. The fibers of the raw wood and/or the veneer on the rotational direction side from the piercing position are pressed by the cutting blade facing toward, and small cracks are formed. At this time,
Since the cutting blades installed in opposite directions apply forces in opposite directions to the log and/or veneer, many small cracks are discontinuous in the direction of the fibers in the log and/or veneer. It is formed as follows.
This makes it possible to effectively correct curling while preventing the veneer from becoming excessively brittle.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a plan view showing the outline of the present invention;
The figure is Fig. 1 - a schematic cross-sectional view showing an enlarged line;
FIG. 3 is an enlarged schematic cross-sectional view of the line in FIG. The cutting edges 3 of the cutting blades 3 are mounted in a line at appropriate intervals on a drive shaft 5 which is rotationally driven by a drive member 4 on a line.
A cutting blade 6a1 to pierce the outer periphery of the log 2 at a position slightly above a and the upper surface of the veneer S cut by the back side of the cutting blade 3 to form a large number of small cracks Sa.
A plurality of rotating bodies 61 to 68 each having a diameter of 6a8 are installed between the rotating bodies 61 to 68, respectively, and the cutting blade 6 is
It is composed of peeling bars 71 to 77 that come into contact with the upper surface of the veneer S stuck and held by a1 to 6a8 to release the stick.

Cutting blades 6a1 to 6 in the rotating bodies 61 to 68
Among a8, for example, the cutting edges 6a1 and 6a of the decimal number
3, 6a5, and 6a7 have their cutting edges advanced in the rotational direction relative to the radial direction, and even-numbered cutting edges 6a2, 6a4, 6a6, and 6a8 have their cutting edges delayed in the rotational direction relative to the radial direction. The rotating bodies 61 to 68 have cutting blades 6a1 to 6a8, respectively.
are combined so that their orientations are different from each other.

In addition, 8 in the figure is a plane stand for attaching the cutting blade 3,
Sb is a back crack that occurs on the back surface of the veneer S when cutting the log 2, and 9 is a scoring knife placed on both end sides of the log 2.

Next, the operation of the present invention will be explained with reference to FIGS. 4A and 4B.

Rotating bodies 61 to 68 according to the rotational drive of the drive shaft 5
is rotated in the direction of the arrow, the cutting blades 6a1 to 6a8
pierces the outer periphery of the log 2 and applies rotational force to the log 2 while forming a small crack Sa, and as the log 2 rotates, the veneer S is cut by the cutting blade 3 that comes into contact with the outer circumferential surface of the log 2. be done.

When the cutting blades 6a1 to 6a8 pierce the raw wood 2, the fibers of the raw wood 2 and the veneer S are moved from the piercing position to the rotational direction by the cutting blades 6a1, 6a3, whose cutting edges are oriented in the direction of rotation with respect to the radial direction. The fibers of the raw wood 2 and the veneer S are pushed out in the rotational direction by the cutting blades 6a2, 6a4, whose cutting edges are oriented behind the radial direction in the rotational direction, resulting in a large number of small particles. A crack Sa is formed. As a result, since the adjacent cutting blades 6a1 to 6a8 apply forces in opposite directions to the log 2 and the veneer S, the forces cancel each other out on the log 2 and the veneer S as a whole, resulting in a large number of forces. small crack
Continuation of Sa in the fiber direction is avoided.

When the upper surface of the veneer S stuck and held by the cutting blades 6a1 to 6a8 comes into contact with the peeling bars 71 to 77, the veneer S is released from the sticking by the cutting blades 6a1 to 6a8 while is discharged out of the veneer lace 1 along the inclined surface of the veneer lace 1.

The strength of the veneer S is excessively weakened because a large number of small cracks Sa are formed in the veneer S cut in the manner described above, which extend short in the fiber direction and are mutually discontinuous. The curling is corrected while preventing curling.

As shown in FIG. 5A, in the present invention, a plurality of rotary bodies 61 to 68 are provided above the cutting edge 3a of the cutting blade 3 at a position where the cutting blades 6a1 to 6a8 are oriented in different directions so as to pierce the outer periphery of the log 2. A configuration in which the following are appropriately combined and arranged.
Alternatively, as shown in FIG. B, a plurality of rotating bodies 61 to 61 with the cutting blades 6a1 to 6a8 oriented in different directions so as to pierce the top surface of the veneer S that has been cut at the position relative to the planer stand 8 on the back side of the cutting blade 3. 68 may be arranged in appropriate combinations.

In addition, any of the rotating bodies 61 to 68 shown in FIGS. 1 and 5A and 5B is configured to be rotationally driven by the drive member 4, or the rotation of the raw wood 2 that is rotationally driven by a spindle, or the cut veneer. Any configuration that rotates in accordance with the discharge of S can be implemented.

Furthermore, in this embodiment, a plurality of rotary bodies each having a large number of cutting edges with cutting edges advanced and retarded in the rotational direction with respect to the radial direction are alternately combined. Even if the rotating body 6 having a large number of cutting blades 6a facing in the radial direction is used and the rotating bodies are combined by changing the direction of the cutting blades as appropriate,
It can be implemented as the present invention.

In addition, the rotating body in the present invention has cutting blades sequentially formed in different directions on one drive shaft, and has a configuration in which a large number of rotating bodies are substantially combined, or a rotating body with a large number of cutting blades in different directions. Any configuration in which the rotating body is provided in sections and the rotary bodies are independently applied to the raw wood and/or the veneer using a fluid pressure cylinder or the like is included within the technical scope thereof.

[Effect of idea]

For this reason, the present invention appropriately combines a rotating body with a cutting edge whose cutting edge faces in the direction of rotation relative to the radial direction, and a rotating body with a cutting edge whose cutting edge faces in the direction opposite to the rotational direction with respect to the radial direction. This makes it possible to provide a veneer lace that can effectively correct curling while preventing small cracks from becoming continuous in the fiber direction and preventing the veneer from becoming excessively brittle.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the outline of the present invention;
The figure is Fig. 1 - a schematic cross-sectional view showing an enlarged line;
Fig. 3 is a schematic sectional view showing an enlarged line of Fig. 1, Fig. 4 is a schematic plan view showing a state in which the cutting blade is stuck, and Fig. 5 shows an example of a change in the mounting position of the rotating body. The schematic side view and FIGS. 6A, 6B, and 6C are explanatory diagrams showing a state of piercing by a conventional cutting blade. In the figure, 1 is veneer lace, 2 is raw wood, 61-68
is a rotating body, 6a1 to 6a8 are cutting blades, S is a single plate,
Sa is a small crack.

Claims (1)

[Claims for Utility Model Registration] A large number of rotating blades that have a number of cutting edges on the outer periphery that pierce the outer peripheral surface of the log and/or a cut veneer veneer, and are supported to rotate as the log rotates. In a veneer lace whose body is spaced at a required distance in the direction of the core of the log, there is a rotating body with a cutting edge whose cutting edge faces in the direction of rotation relative to the radial direction, and a rotating body with the cutting edge facing in the direction opposite to the direction of rotation relative to the radial direction. A veneer lace characterized in that a rotating body having a cutting edge facing toward the veneer lace is arranged in an appropriate combination according to the fiber bond strength of the veneer veneer to be cut.