JPS633723B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scoring device for veneer lace, and its purpose is to provide a scoring device that can cut a veneer veneer with a good texture on the end surface with a simple configuration. This aims to improve the yield, stabilize the processing in the next process, and further ensure the process of inserting the thread into the butt end surface.

Conventionally, when cutting a veneer veneer from raw wood, a sliver blade is attached to both ends of the pressure shear bar of the veneer lace, and the irregular end face of the raw wood is shaped to obtain a veneer veneer with a straight end face. Things have been done. However, in this conventional scoring tool device, the height of the scoring blade must be set to be greater than the thickness of the cut veneer in order to ensure the removal of marking debris, and therefore the movement of the tool rest is difficult. As a result, the same cutting groove has to be cut many times. That is, the outermost part that should actually be cut by the knife is the cut groove that was previously cut one rotation before, and the part that is actually cut by the scoring blade is This is the part inside the outer periphery of the raw wood that will be made into veneer veneer next time or later. Therefore, the scoring blade cuts the same groove at least twice,
However, in order to withstand such powerful cuts, conventional scoring blades had to be constructed in a so-called double-sided blade shape, with sloped surfaces on both sides of the cutting edge. The grooves were forced open on both sides, and friction occurred between the butt end surface and the blade of the scribing blade, causing problems such as roughening of the surface of the cut end surface of the veneer veneer. In particular, if the raw wood is a soft material or a brittle punky material, the ruled skin will peel off and become tattered, making the accuracy of ruler placement in the subsequent process unstable, and If the wetting condition was severe, the butt end surface would fall off to the extent that the veneer dimensions would not be met, resulting in a decrease in yield. In addition, in order to reinforce the veneer, when making circumferential cuts on the ruled surface and inserting thread into the cuts, as mentioned above, if the end surface of the log is tattered, it is difficult to securely fix the thread. Furthermore, even if the thread could be inserted, the end portion of the veneer would fall off during the handling process, and the thread would come off, making it impossible to obtain the substantial effect of reinforcing the veneer.

In order to overcome these problems, the present invention aims to manufacture a veneer veneer with good ruled surface.
To this end, a second scoring blade with a single-sided edge for finishing is placed on the inside edge of the conventional scoring blade, and these two types of scoring blades perform the two functions of rough scoring and finishing scoring. That is.

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

The veneer lace shown in Figures 1 and 2 is
This is a so-called outer periphery drive type veneer lace in which cutting power is applied also from the outer periphery of the drive roll R. , rotated by a drive device (not shown) such as an electric motor, and the piercing body 6
The veneer veneer is cut by the knife 1 while a piercing blade 6a installed on the outer periphery of the log 2 is pierced into the outer periphery of the log 2. Reference numeral 4 denotes rectangular plate-shaped pressure bars attached to the support base 5 at equal intervals, and is in the form of a normal single pressure bar divided in order to arrange the protrusions 6 in the gaps between each pressure bar. In the figure, 3b is a blade pressing member that fixes the knife 1 to the blade turret 3, 7a is a bearing,
3a is a veneer guide, 8 is a peeling bar for peeling off the veneer 2a that has just been cut and has been pierced by the piercing body 6 from the piercing blade 6a, 9 is a chain sprocket, and 9a is a chain.

In such a veneer lace, among the plurality of pressure bars 4 arranged in the direction of the cutting edge of the knife 1, the first scribe blade A for rough scribing and the first scribe blade A for finishing are applied to the raw wood contact surfaces of the pressure bars located at both ends. The second creasing blade B is attached to form a creasing knife device, but the arrangement of both creasing blades A and B is the same as that of the first creasing blade A, as shown in Figures 3 and 4. The second creasing blade B should be on the outside, and the second creasing blade B should be on the inside of it, and both creasing blades A and B should be shifted up and down so that they do not align with each other in the axial direction of the raw wood, that is, in the axial direction of the spindle. Deploy. That is, the first scoring blade A is for rough scoring, so it cuts the outside of the end of the log, and the second scoring blade B is for finishing, so it is not cut by the first scoring blade A. Slightly inside the cut groove (usually 4 mm)
It is arranged so that the front and back) are cut. In addition, by cutting twice by the first scoring blade A and the second scoring blade B, the cutting resistance applied to the end surface of the log is alleviated, thereby making the surface beautiful. Blades A and B must be placed in positions that do not overlap each other in the axial direction of the log. However, as in the illustrated embodiment, the first scoring blade A does not have to be above the pressure bar 4; on the contrary, the second scoring blade B
There is no problem even if it is higher. However, in that case, the first creasing blade A is better than the second creasing blade B.
It is necessary to make a cut on the outer circumference of the log before cutting, and for this purpose, the amount of cut made by the first scoring blade A is deeper than the amount of cut made by the second scoring blade (preferably,
(deeper than the thickness of the veneer), and must be configured so that when the second scoring blade makes a cut, the first scoring blade has already made a cut on the slightly outer side thereof. Also, at this time, it is preferable that the scoring blade placed above be placed as close to the knife 1 as possible so that deep cuts can be made even if the diameter of the log becomes small.

To install both line pulling blades A and B, pressure bar 4
This is done by removably fixing the base of the creasing blade to mounting grooves 10a and 10b drilled on the surface of the holder. It is also possible to attach it directly to 5. Also, as shown in Fig. 1, mounting grooves 10a and 10b are bored in several pressure bars near the side ends,
If the setting positions of the scoring blades A and B are appropriately changed according to changes in the length of the raw wood or the dimensions of the scoring, it is convenient to avoid removing the pressure bar 4 one by one.

Next, we will explain the shape of the blades of the double-lined cutting blades A and B. First, the first scoring blade has a sloped blade, as shown in the figure, in order to withstand strong cuts including hard parts such as knots. A double-sided blade shape in which the surfaces 1a are on both sides of the cutting edge is preferred, but is not necessarily limited to this. On the other hand, in order to prevent damage to the end surface of the veneer, the second scoring blade has a blade inclined surface 1a only on the opposite side of the wood end contact surface 1b, as shown in the figure.
It is essential that the blade has a single-sided blade shape.

It should be noted that the mounting grooves 10a and 10b formed on the surface of the pressure bar 4 do not need to be provided separately; for example, a mounting groove 10c may be formed as shown in FIGS. A first scoring blade A having a double-sided blade shape and a second scoring blade B having a single-sided blade shape can be installed vertically therein. The point is that it is only necessary to make a new cut with the second scoring blade B on the slightly inner side of the cut groove cut by the first scoring blade A, and the design for this can be changed as appropriate. be.

The present invention is configured as described above, and the first scoring blade A
After wide scoring cutting is performed with the knife 1, a new cut is made on the same side of the cut groove with the second scoring blade B for finishing, so the condition of the veneer immediately after cutting with the knife 1 is As shown in FIG. 5, the line scraps 11 are removed separately from the outermost line scraps 12 separated by the first rule scraper A. In addition, in FIG. 5, a state in which the line-pulling waste 11 is continuously discharged is shown, but both the line-pulling blades A,
If the interval B becomes narrower, the lined waste 11 is discharged in smaller pieces.

In this way, according to the present invention, first, the first scoring blade forms a cut groove on the outside, and then the second scoring blade, which has a single-sided blade, makes a second cut on the inside of the cut groove. There is virtually no pressure or friction from the sloped surface of the blade, and even if the raw wood itself is a soft or fragile piece of wood, there is no pressure or friction, so the crease skin will peel off and become tattered. A good veneer end surface can be obtained, and along with the incision made by the first creasing blade,
Since the cutting resistance caused by the second scoring blade is significantly reduced, there is no practical problem even if the second scoring blade has a single-sided blade shape.

Next, FIGS. 8 and 9 will be explained. 8th
9 shows an embodiment according to the second invention, in which a thread guide 13 is provided through the log end abutment surface 1b of the second creasing blade B constituting the first invention. It is characterized by the fact that a thread inserting blade 14 is attached thereto.

Originally, the thread inserting blade part 14 was formed by cutting the veneer veneer 2a by making a circumferential cut in the end surface of the raw wood and continuously inserting a wire rod 15 such as thread into the cut. However, as mentioned above, if the condition of the end surface is poor, the wire may not be inserted, or even if it is inserted, it will not be able to be securely fixed.
The intended purpose of reinforcement cannot be achieved because it may come off in the subsequent process. Therefore, in this second invention, the end surface of the raw wood is cut into beautiful lines by the first scoring blade A and the second scoring blade B, and the thread inserting blade part 14 is attached to the end surface of the raw wood.
The wire rod 15 is to be charged by the second
On the contact surface 1b of the creasing blade B perpendicular to the axial direction of the log,
A thread inserting blade part 14 having a cutting edge parallel to the cutting edge of the knife 1 is provided in a protruding manner, and inside the thread inserting blade part 14 is a thread path 13 connected to the second creasing blade B so as to pull out the wire from the end surface. Install through. On the other hand, the wire passes from a spool (not shown) arranged above the pressure bar 4, passes behind the pressure bar 4, and further passes through the lower notch 4a to reach the thread path of the second creasing blade B. However, the point is that any configuration can be used as long as the wire rod can be inserted into the cut groove on the end surface of the log formed by the thread inserting blade 14.
Therefore, the shape of the thread path, such as the notch 4a formed in the pressure bar 4, the second scoring blade B, and the through hole formed in the thread inserting blade 14, does not matter. For example, instead of the perforated thread path 13,
A thread conduit bent at right angles may be attached to the lower ends of the second scoring blade B and the thread inserting blade 14, or a groove may be provided at the lower ends. Of course, it is only a matter of design that the second scoring blade B and the thread inserting blade 14 are integrally formed. Various types of wire rods can be considered, such as natural fibers, chemical fibers, thin wires made of soft metal, glass fibers, carbon fibers, etc., and can be selected as appropriate depending on the purpose. The adhesive may be impregnated by passing it through a container containing the adhesive.
Especially when impregnated with a wet gel type adhesive,
Gelation is promoted by the moisture present in the veneer,
Strong reinforcement is possible. In some cases, an adhesive is used in conjunction with the pressure bar, and in other cases, the pressure is held by the friction of the cut groove without using an adhesive. It is also possible to close the cut groove and prevent the wire from coming off by protruding into the wire and compressing the cut groove after the wire has been inserted.

When the second scoring blade B having such a thread insertion blade part 14 is placed slightly inside the first scoring blade A at a position where they do not overlap in the axial direction of the log 2, and the log 2 is cut, the second A circumferential incision is made by the thread inserting blade 14 on the end surface of the new log that has been crease-cut by the scoring blade B, and a wire rod 15 fed out from the end face of the thread inserting blade 14 is charged into the incision. is,
A veneer veneer 2a with thread inserted at both ends as shown in FIG. 11 is cut. At that time, since no lateral pressure is applied to the new wood end face cut by the second creasing blade B,
A smooth butt end surface with no peeling of the end can be obtained, and therefore the thread can be reliably cut into and fixed in the groove. Therefore, it is possible to solve all the problems caused by the separation of threads in the subsequent process at once, and it is also possible to prevent the expansion of cracks in the veneer and the occurrence of cracks, contributing to an improvement in yield. can do.

Furthermore, by forming the contact surface of the wood end of the second scoring blade at right angles to the axial direction of the wood, the end surface of the cut veneer veneer becomes perpendicular to the board surface, improving the performance of ruler drawing in the subsequent process. It will also result in a significant improvement.

As described above, the present invention improves the crease cutting process for veneer lace to avoid applying a large amount of resistance to the butt end surface, thereby speeding up processing in the post-process and improving yield. etc., and contributes greatly to the plywood manufacturing industry.

[Brief explanation of the drawing]

The drawings show an example of implementing the present invention.
The figure is a front view showing a part of the veneer lace equipped with the scoring device according to the present invention, FIG. 2 is a sectional view showing the cutting state, and FIG. 3 is a perspective view of the scoring device attached to the pressure bar. Figure 4 is a plan view thereof, Figure 5 is an explanatory diagram showing the cutting state of the veneer veneer, Figures 6a and 7a are front views showing other embodiments, and Figure 6b , FIG. 7b is a plan view of the same, FIG. 8 is a perspective view of the marking device according to the second invention attached to the pressure bar, FIG. 9 is a plan view thereof, and FIG. 10 shows another embodiment. FIG. 11 is a perspective view of a veneer veneer that has been cut with a wire inserted therein. A...First scoring blade, B...Second scoring blade, R...Drive roll, 1...Knife, 1a...Blade inclined surface, 1b...Log end contact surface, 2...Log, 2a...Single board, 3 ...Turret rest, 3a...Single plate guide, 3b...Cutter pressing member, 4
...pressure bar, 4a...notch, 5...support stand, 6...piercing body, 6a...piercing blade, 7...drive shaft,
7a... Bearing, 8... Stripping bar, 9... Chain sprocket, 9a... Chain, 10a, 10b, 1
0c... Crease removal blade mounting groove, 11, 12... Crease removal waste,
13... Thread path, 14... Thread insertion blade part, 15... Wire material such as thread.

Claims (1)

[Scope of Claims] 1. In a veneer lace equipped with a scoring blade that forms the end surface of a Bayer veneer cut from raw wood, the innermost side of the groove cut by the scoring blade is renewed. In order to cut into the raw wood, a single-sided second creasing blade having an inclined blade surface only on the opposite side of the contact surface of the log end is arranged at a position where it does not overlap with the creasing blade in the axial direction of the log. A ruled knife device featuring: 2. A mounting hole for a creasing blade is formed on the log contacting surface side of the pressure bar of the veneer lace, and the creasing blade and the second creasing blade are detachably mounted in the mounting hole. The lined cutter device described in Section 1. 3. Claims 1 or 2, wherein the scoring blade is a double-sided blade-like blade having sloped blade surfaces on both sides.
The lined cutter device described in Section 1. 4 In a veneer lace equipped with a scoring blade that forms the end surface of a veneer veneer cut from raw wood, the cutting edge of the raw wood is A second creasing blade having a single-sided blade having an inclined blade surface only on the opposite side of the contact surface is arranged at a position where it does not overlap with the creasing blade in the axial direction of the raw wood, and furthermore, a second creasing blade is placed in a position where it does not overlap in the axial direction of the raw wood, and In order to make a circumferential cut in the resulting new wood end face, and to insert the wire into the cut, the thread inserting blade portion, which has formed a thread path, is brought into contact with the wood end of the second creasing blade. A ruled knife device characterized by having a cutter on the surface. 5. A mounting hole for a creasing blade is formed on the log contact surface side of the pressure bar of the veneer lace, and the creasing blade and the second creasing blade are removably mounted in the mounting hole. The lined cutter device described in Section 1. 6. Claim 4 or 5, wherein the scoring blade is a double-sided blade-like blade having blade slopes on both sides.
The lined cutter device described in Section 1.