JPH0349721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for cutting raw wood for veneer lace.

The present applicant previously published "Unexamined Japanese Patent Publication No. 136795/1983"
In this paper, we proposed a new method for cutting logs in which a veneer lace is equipped with a tender roll having protrusions on the circumferential surface, and the veneer to be cut is subjected to a tender treatment.

According to this cutting method, the curling of the cut veneer due to the tender treatment by the piercing of the piercing body is prevented, so the post-processing of the veneer is significantly easier than in the past. Of course, by adopting a configuration in which at least a part of the power required for cutting is supplied from the outer circumferential surface of the log through the piercing body, the power required for cutting can be supplied only from the chuck for holding the log, which was frequently caused in the past. Due to the power supply of
It was also found that damage to logs was prevented or significantly suppressed, and it was found to be useful for streamlining the log cutting process.

However, on the other hand, if the raw wood is uniformly cut using the above-mentioned cutting method, puncture marks of the puncture body due to the tendering process will be formed on all the veneers to be cut. It has been found that plywood formed by combining these veneers inevitably suffers from loss of decorativeness, smoothness, etc. on the surface, causing new problems that limit its use.

Therefore, in order to solve the above-mentioned problem, we have further developed the original application of the present invention, "Japanese Patent Application No. 1983-40833"
No. 136795), we proposed an improved cutting method in which veneers other than the original veneer and the original veneer are cut in separate forms, and achieved considerable results. It has been found that there is some difficulty in preventing damage to the cutting method, and that there is room for further improvement.The following will first explain the outline of the improved cutting method and clarify the above-mentioned difficulties, which are the problems to be solved by the present invention. .

The improved cutting method, for example, as illustrated in FIG. 1, connects a support 5 via a bearing 4 to a planer stand 2 having a cutting blade 3, and operates an operating mechanism 7 consisting of a fluid cylinder or the like. , the support body 5 is configured to be able to swing upward from a lowered position where it abuts a stopper 6 attached to the planer stand 2;
Furthermore, a plurality of narrow rolls 11 each having a large number of protrusions 10 on the outer periphery have drive shafts 9 fitted at arbitrary intervals over substantially the entire length of the log 1, which are pivoted to the support 5. , a motor, etc., and a plurality of divided pressure bars 12 are attached to the support body 5 and positioned between the narrow rolls 11, and an operating mechanism ( A center liner cutter 14, which can be selectively raised and lowered by the operation of a motor (not shown), is disposed approximately at the axial center of the log 1, and side liner cutters 14a are provided near both ends of the log 1, respectively. In addition, a transmission force adjusting member (not shown) such as a clutch brake that can adjust the power transmission force by changing the voltage is interposed between the drive source (not shown) such as a motor or the like and the chuck 13. This is carried out using a veneer lace configured so that the capacity of power that can be transmitted to the log 1 via the chuck 13 can be arbitrarily set by adopting the following means.

That is, when cutting a veneer other than the original veneer, for example, a relatively thick veneer for the medium veneer, from the irregularly shaped outer circumferential part of the log as usual, as shown in Fig. 1, the support With the body 5 lowered to the position where it hits the stopper 6, the drive source 8 rotates the narrow roll 11, and the power supplied from the chuck 13 to the log 1 is equal to the power required for cutting the veneer for the medium board. The capacity is set to an arbitrary smaller value, and the center liner blade 14 is also lowered.

As the log 1 rotates, the planer stand 2 moves by a predetermined amount in the centripetal direction of the log 1, and eventually the piercing body 10 of the narrow roll 11 pierces the outer peripheral surface of the log 1, and the cutting blade 3 cuts the log. being done,
The part corresponding to the scraps has been divided in advance by the side line drawing cutter 14a, and the center line drawing cutter 14
The intermediate veneer of the desired thickness, which has been divided into two parts, is sequentially cut, but at least a part of the power required for cutting is transferred to the raw wood through the piercing body 10 of the narrow roll 11. Since the power is supplied to the outer circumference of the chuck, a more stable power supply is achieved compared to the conventional case where power is supplied only from the chuck, and damage to logs is prevented or greatly reduced, and damage to logs is reduced. The entire width of the veneer is tenderized by piercing with the piercing body 10, and curling of the veneer is prevented, which greatly simplifies the treatment of the veneer in the post-processing process, making the process faster overall. It can be significantly streamlined.

Next, as usual, after all defects have been removed from the irregularly shaped outer circumference of the raw wood, when cutting the relatively thin original veneer that will make up the surface of the plywood,
Cutting is temporarily stopped, and after changing the settings as follows, cutting is restarted.

That is, as illustrated in FIG.
1 and the pressure bar 12 are separated from the outer circumferential surface of the log 1, the center scoring cutter 14 is also separated from the outer circumferential surface of the log 1, and the planer stand 2 is moved in the centripetal direction of the log 1 per rotation of the chuck 13. The amount of power is changed to correspond to the thickness of the veneer for the original board, and the capacity of the power that can be supplied to the log 1 via the chuck 13 is set to a capacity greater than the power required to shave the veneer for the original board. .

When cutting is resumed with the above settings, the cutting blade 3 will eventually start cutting, and the original veneer of the desired thickness, whose portions corresponding to scraps have been separated by the side scoring blade 14a, will be successively cut. However, since the piercing by the piercing body 10 of the narrow roll 11 is released, there is no possibility that piercing marks will remain on the original veneer to be cut, and as a result, the surface of the plywood is Deterioration of decorativeness, smoothness, etc. can be avoided.

In addition, as the diameter of the raw wood is gradually reduced, if defects such as knots and cracks appear in the raw wood and it becomes unsuitable for use as a veneer for the original board, the settings should be changed again as shown in Fig. It is sufficient to cut the veneer, and the above example is an example in which a pressure bar is not used when cutting the veneer for the original plate. It is also possible to separately provide a pressure bar and use it selectively at any time.

As is clear from the above, according to the above-mentioned improved cutting method, veneers other than the original veneer which have been subjected to the tender treatment over the entire width and the original veneer in which there are no puncture marks of the puncture body can be cut. It can be selectively removed, and when cutting veneers other than original veneers, damage to the original wood can be prevented or significantly reduced by supplying power through the piercing body. It is extremely useful for streamlining the log cutting process.

In addition, although the veneer for the base plate is not subjected to tender treatment, there is no particular problem with the winding process, etc. as before, and furthermore, the power supply when cutting the veneer for the base plate is only from the chuck. As is well known, the thickness of the veneer for the original board is thinner than that of veneers other than the veneer for the original board, and the cutting resistance is accordingly reduced, so the probability of damage to the original wood is low, at least compared to the conventional veneer. There is no risk of damage to the log being worse than with the cutting method.

However, even if the cutting resistance during cutting veneer for the original board is small, as long as the power is supplied only from the chuck, there is always a factor that can damage the raw wood, which is weak in the center.

The present invention further improves the above-mentioned improved cutting method in order to solve the above-mentioned difficulties.
Specifically, the running positions of the piercing bodies are separated according to their functions, and when cutting a veneer for the original plate, the desired power is supplied from other piercing bodies located outside the cutting tools on both sides. The aim is to more accurately suppress log damage.

Hereinafter, the present invention will be described in detail together with an example of implementation illustrated in the drawings. For convenience, the same reference numerals are given to substantially the same members as those constituting the veneer lace in the example of the improved cutting method described above. , detailed redundant explanations will be omitted as much as possible.

In the cutting method according to the present invention, as illustrated in FIGS. 3 to 5, a drive source 8 is
A plurality of narrow rolls 11 as a first drive member which are rotationally driven by a plurality of narrow rolls 11 are disposed on the center side of the raw wood between the side scoring cutters 14a via a swingable support 5, and A large number of piercing bodies 1
A drive roll 11a as a second drive member equipped with a drive roll 11a is moved to a position outside (closer to the log end surface) of the both side scoring cutters 14a via a support stand 17 fixed to the planer stand 2, and the piercing body 10a is configured to be able to pierce the outer circumferential surface of the raw wood, and is configured to be rotationally driven by a drive source 15 consisting of a motor, etc. Further, a part of the planer stand 2 is extended to the rear of the support 5, and to the extended portion 16, A guide 20 for guiding a slide member 19 having an integrated pressure bar 18 at its tip, and a reciprocating mechanism 21 consisting of a fluid cylinder or the like for reciprocating the slide member 19 back and forth are provided. This is done using a veneer lace that is configured so that the capacity of power that can be transmitted to the logs via the veneer lace can be set arbitrarily.

In other words, when cutting veneers other than the original veneer from the irregularly shaped outer circumferential part of the original wood as usual,
As shown in FIG. 4, when the reciprocating mechanism 21 operates, the pressure bar 18 is retracted via the slide member 19, and the support body 5 is lowered to the position where it hits the stopper 6. The roll 11 is rotated, and if necessary, the drive roll 11a is also rotated by the drive source 15, and the power supplied from the chuck to the raw wood is arbitrarily reduced in capacity to an amount smaller than the power required for cutting the veneer for the medium board. Set it.

As the log 1 rotates, the planer stand 2 moves by a predetermined amount in the centripetal direction of the log 1, and eventually the piercing body 10 of the narrow roll 11 and the piercing body 10a of the drive roll 11a pierce the outer peripheral surface of the log 1. , Cutting is performed using the cutting blade 3, and similarly to the improved cutting method described above, while avoiding damage to the raw wood, the veneers for the medium board of the desired thickness are sequentially tenderized over the entire width. Will be deleted.

Next, as usual, after all defects have been removed from the irregularly shaped outer circumference of the raw wood, when cutting the relatively thin original veneer that will make up the surface of the plywood,
Cutting is temporarily stopped, and after changing the settings as follows, cutting is restarted.

That is, as illustrated in FIG.
1 and the pressure bar 12 are separated from the outer peripheral surface of the log 1, and the actuation mechanism 21 is operated,
Pressure bar 18 via slide member 19
Further, the amount of movement of the planer stand 2 in the centripetal direction of the raw wood per revolution of the chuck is changed to correspond to the thickness of the veneer for the original plate, and The ratio of the power capacity to be supplied to the log and the power capacity to be supplied to the log via the chuck can be set arbitrarily, and there is no problem even if the power supply from the chuck is cut off. The supply must not be set to zero.

When cutting is restarted with the setting changed, the cutting blade 3 will eventually start cutting, and the original veneer of the desired thickness will be sequentially cut away. However, the piercing by the piercing body 10a Side ruled knife 1
Since it is limited to the part corresponding to the line scraps outside of 4a, there is no risk of the puncture marks of the puncture body remaining on the original veneer, and in the above embodiment, the pressure of the pressure bar 18 is The accompanying improvement in the cutting surface can also be expected as usual.

Furthermore, since at least a part of the power required for cutting the original veneer is supplied from the piercing body 10a located on the outside of the both side scribing cutters 14a,
Damage to the raw wood during cutting of the veneer for the original board can be more accurately avoided than in the past, and the drawbacks of the improved cutting method described above can be overcome.

Of course, as the diameter of the log is gradually reduced, if defects such as knots and cracks appear in the log and it becomes unsuitable for use as a veneer for the original board, the settings should be changed again as shown in Figure 4, and the veneer for use as a veneer for the original board should be changed again. All you have to do is cut the board.

Incidentally, in the above embodiment, the first
As a second driving member, each piercing body is provided on the outer periphery of the roll, but a large number of piercing bodies are provided on the outer periphery of an endless member such as a chain driven by a sprocket wheel etc. There is no problem in constructing it so that it runs on the outer circumferential surface, and there are no particular restrictions on the shape of the piercing body, but in any case, the running position of the piercing body is in the vicinity where cutting resistance is generated by the cutting blade and the pressure bar, that is, in the cutting area. A position close to the cutting edge of the knife is preferable.

[Brief explanation of drawings]

The drawings are for explaining the present invention, and FIGS. 1 and 2 are schematic side views of a veneer lace used to carry out the improved cutting method that forms the basis of the present invention, and FIG. Partial front explanatory diagram of the veneer lace used in the method of cutting logs related to the above, Part 4
The figure is a schematic explanatory cross-sectional view to the left from the line segment X-X in Figure 3, Figure 5 is a schematic cross-sectional explanatory view to the right from the line segment X-X in Figure 3, and Figure 6 is a cross-sectional schematic explanatory view from the line segment X-X in Figure 3 to the right side. 6 is an explanatory side view showing another operating state of the veneer lace illustrated in FIG. 5. FIG. DESCRIPTION OF SYMBOLS 1... Log, 2... Planer stand, 3... Cutting knife, 5... Support body, 7... Actuation mechanism, 8, 15... Drive source, 9... Drive shaft, 10, 10a... Pierce body, 11... Narrow roll, 11a... Drive roll, 12... Segmented pressure bar, 13... Chack, 14... Center line drawing cutter, 14a... Side line drawing cutter, 17... Support stand, 18... Integral pressure bar, 19...
Slide member, 21... reciprocating mechanism.

Claims (1)

[Scope of Claims] 1. While the raw wood is rotatably supported by a chuck, the logs are arranged in the width direction near the cutting blade, at arbitrary intervals between the side scribing blades, and are separated from and separated from the outer peripheral surface of the log. a first drive member including stabbing bodies that are arranged so as to be able to face each other; and a second driving member that includes stabbing bodies that are located outside the side scribing blades and are arranged to be able to stab the outer peripheral surface of the raw wood. At least a part of the power required for cutting is supplied from the outer circumference of the log by the drive member configured with the drive member, and power supply from the spindle is also used as necessary, so that the veneer for the original board and the veneer for the original board are produced from one raw wood. When cutting a veneer other than a veneer, when cutting a veneer other than an original veneer, move the first driving member to a position where the piercing body pierces the outer circumferential surface of the raw wood, and The raw wood is cut by supplying power from at least the first driving member of the drive members, and when cutting the raw veneer, after separating the first driving member from the outer peripheral surface of the raw wood, A method for cutting raw wood for veneer lace, characterized in that the raw wood is cut by supplying power from a second driving member.