JPS5828414A - Cutting device - Google Patents

Abstract

PURPOSE:To prevent occurrence of front cracks on the way of cutting a plate body involving wooden fibers by engraving a plurality of grooves at optional intervals on the back of the tip of cutting edge. CONSTITUTION:Grooves 13 having a curved surface of a specified sectional shape are engraved on the back 11 of the tip of cutter edge of a round cutter 10 having a certain inclination angle on the periphery with its cutting edge formed to an annular shape, thus the annular cutting edge 16 is formed. A rotary cylindrical body 19 is arranged to oppose to the cutting edge 16 and to partially overlappingly contact with this cutting edge 16, so that the side 20 contacts partially and overlapping with the back 11 the tip of the cutting edge. A plate body 22 to be fed by a conveyer 24 is cut off to provide the satisfactory cut surface without producing front cracks between the cylindrical body 19 and the cutting edge 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device for cutting boards having wood fibers, such as plywood, veneer, laminated wood, and lumber.

Conventionally, when cutting a plate, there are rotary cuts using a relatively long blade having the dimensions of the plate to be cut, shear cutting methods, sawing methods using a circular saw with saw blades formed on the periphery, and A variety of methods have been adopted, including a slitter cut method consisting of a disc-shaped round blade.

The rotary cut method described above is advantageous because it operates quickly when cutting veneers parallel to the fiber direction, but it is advantageous when cutting veneers parallel to the fiber direction, but it is also advantageous when cutting veneers parallel to the fiber direction, but it is also advantageous when cutting veneers parallel to the fiber direction. It is impossible to cut plywood that has been
Alternatively, reliable cutting cannot be obtained, and although the shear cut method 5 can cut even relatively thick plates, the equipment cost is higher than that of the rotary cut method, and cutting takes time. However, it is not possible to cut long gas or continuous plates.

The Makino saw cutting method is widely used for cutting materials other than plywood, lumber, etc., as well as logs, regardless of the thickness of the board, but the cut surface of the sawed board must meet a certain standard of accuracy. If required, a finishing process using a planer or the like must be performed, and as a result, approximately 81,111 pieces are turned into wood chips and powder during the sawing process and the finishing process using a planer. decline is inevitable.

Furthermore, when cutting a plate using the above-mentioned slitter cut method, the rotary cut and shear cut methods described above are impossible, depending on the size of the plate, and unlike the saw cutting method, there is no reduction in yield due to the saw path. However, the cut surface of the plate is rougher than that of the above-mentioned saw cutting method, and delamination is more likely to occur especially in plates with adhesive layers such as plywood and laminated materials. .

That is, this slitter cutting method is as shown in the first diagram.
Usually a pair of upper and lower disc-shaped round blades of 1.2ft.

The round blades l, 2. They are rotated in opposite directions to cut the plate 8.

However, according to this method, at the cutting position, the plate 8 is forcibly transferred from horizontal conveyance to each circumferential surface of the upper and lower round blades 1 and 2, and is curved! Since the veneer is transported and cut while exhibiting a This results in peeling between the adhesive layers.

Furthermore, if the carrying direction of the plate 8 and the direction of the fibers of the plate 8 match, the fibers engaged with the round blades 1 and 2 will sequentially crack 4 at the same time as the cutting starts, causing the plate 8 to crack. As the product continues to be transported, the four cracked portions are torn off and damaged, resulting in a cut surface that is not straight and has an uneven shape, which significantly reduces the product value.

The board 8 to be cut will be explained by taking the plywood 5 shown in FIG. for,
A large number of defects occur in the intermediate plate 8 due to the above-mentioned tip cracks 4, and furthermore, delamination occurs at the cut edges.

In view of the above, the present invention provides a cutting device that makes the cut surface of a plate good and does not cause the compression shape of the plate. Let's start with the configuration.

On the back side 11 of the cutting edge of the round blade 10 which has a constant inclination angle on the periphery and the cutting edge portion is annular (5), the cross-sectional shape is at least in the direction of rotation from the center of the round blade 10 to the edge of the cutting edge. A plurality of grooves 18 having a constant curved surface 12 are carved at arbitrary intervals, and a through hole 14 is formed in the center.
A shaft 15 is fitted into the through hole 14 to create a rotatable cutting blade 16.

Incidentally, instead of the groove 18 having the curved surface 12, a groove having an inclined fR surface 12' whose cross-sectional shape is constant in the direction of rotation as shown in FIGS. 5A to C and 6 A to C may be used. 1
8' is also possible. - The cutting blade 16 has a cutting edge stand 17 having a certain shape facing each other, and the cutting edge surface 18 of the cutting edge stand 17 and the back surface 11 of the cutting edge of the cutting blade 16 are arranged so that they partially come into contact with each other. Moreover, the vertically opposing positions of the cutting blade 16 and the cutting edge stand 17 are such that when the cutting blade 16 is placed upward, the cutting edge stand 17 is positioned downward, and conversely, when the cutting blade 16 is placed downward, the cutting edge stand is positioned downwardly. 17 is disposed upwardly, and both can be disposed so as to be displaceable in front of each other.

Furthermore, in place of the cutting edge stand 17, a running cylinder 19 is adopted, the peripheral edge facing the cutting blade 16 having a constant cylindrical surface (6), and the side surface 20 of the cylinder 19 and the It is also possible to arrange the blade edge back surface 11 of the cutting blade 16 so as to partially overlap and contact with each other. It can be rotated freely.

a relative arrangement relationship between the cutting blade 16 and the cylindrical body 19;
In particular, the axis position is such that the axis 21 of the cylindrical body 19 is positioned on the loading side of the plate 22 to be cut from the axis 15 of the cutting blade 16 with an even-odd phase, and each rotation center is shifted. At the same time, the apex P of the side surface 20 of the cylindrical body 19 is set as the intersection with the back surface 11 of the cutting edge of the cutting blade 16, and the vertically opposing positions of the cutting blade 16 and the cylindrical body 19 are arranged so that the apex P of the side surface 20 of the cylindrical body 19 is the intersection point Similarly, the cutting blade 16 is relatively displaceable.
When the cylindrical body 19 is positioned upward, the cutting blade 16 is positioned downward.
When the position is below, the cylindrical body 19 is placed above.

Next, at the IB 8 of the cutting position 28 and the unloading side, a conveying device 24 such as a caterpillar, rollers, or a belt conveyor is installed.
are arranged close to each other, and when the conveying surface of the conveying device 24 is located below the cutting edge stand 17 or the cylindrical body 19, the cutting edge of the cutting edge stand 17 or the cylindrical body 1- 9 is the same as or slightly above the apex P, and when the cutting head rest 17 or the cylindrical body 19 is located above, the blade height of the cutting head rest 17 or the apex P of the cylindrical body 19 is slightly higher. It should be downward.

Next, the action will be explained.

First, a case where the cutting blade 16 and the cutting edge stand 17 are disposed so as to face each other will be explained based on FIGS. 7 to 9.

If the cutting edge stand 17 is located below, the tip of the plate 22 carried in via the conveyance device 24 will be horizontally placed above the cutting edge of the cutting edge stand 17, and then the tip of the plate body 22 will be placed horizontally above the cutting edge of the cutting edge stand 17, and then the cutting edge stand 17 will be placed upward. , the upper surface of the plate 22 is sent to the cutting position 28 while being in contact with the cutting edge of the cutting edge stand 17.

At the cutting position 28, the cutting blade 16 rotates at a constant speed.
The cutting surface 18 of the cutting edge stand 17, which is in partial contact with the back surface 11 of the cutting edge, allows the cutting of the plate 22 to occur in the fiber part of the plate 22 parallel to the conveyance direction, and to keep this fiber part constant. There is a tendency for inertia to cause the tip to split 4 over the length.

However, between the curved surface 12 or inclined surface 12' of each groove 18, 18', which is carved at arbitrary intervals on the circumferential edge of the cutting blade 16, and the cutting surface 18 of the cutting edge stand 17, The fibers in the plate 22 that are about to be split at the tip 4 are finely torn each time, the occurrence of the tip 40 is instantly prevented, and the plate 22 can be cut well. Therefore, the cut surface of the plate 22 is
A case in which the cylindrical body 19 is arranged to face the zero-order cutting blade 16, which is vertical and beautiful and straight in the longitudinal direction, will be explained based on FIGS. 10 to 12. .

The tip of the plate 22 carried in via the conveyance device 24.

When the cylindrical body 19 is located below, the bottom surface of the end contacts the cylindrical body 19 once, and then the top surface of the end contacts the cutting blade 16.
If the cylindrical body 19 is located above, the upper surface of the cylindrical body 19 will once come into contact with the cylinder 9, and cutting will begin at the same time.

During cutting, the axial center is deviated from the cutting blade 16 to the carry-in side, and the cylindrical body 19, which serves as the introduction part of the plate body 22, rotates in the opposite direction to the cutting blade 16 around the shaft 21, so that the cylindrical body 19
The plate body 22 is a product 22a with the vertex P on the side surface 20 as a border.
The product 22a is then horizontally conveyed and delivered to the conveying device 24, and the selvedge 221 is cut into pieces 22b.
) portion is regulated to follow the rotational stress of the cylindrical body 19, and when the cylindrical body 19 is located below, the lug 22b elastically returns diagonally downward, and when it is located above, diagonally upward. Each is discharged.

At this time, the plate body 22 is cut at the apex P of the side surface 20 of the cylindrical body 19 by the rotation of the cutting blade 16, but since the product 22a to be cut is always maintained in a horizontal position, No compressive stress is applied to the cut edge during cutting, so there is no peeling of the contact layer, and the cut surface is designed to prevent tip cracking 4 from occurring, as in the case of the cutting edge stand 17 described above. (lO) and becomes straight.

As described above, according to the present invention, when cutting a plate having wood fibers, the tip cracks of the fibers that occur during cutting can be prevented by using a plurality of grooves carved at arbitrary intervals on the back surface of the cutting edge of the cutting blade.
It is possible to finely tear each time, a straighter cut surface can be obtained compared to the above-mentioned methods, and the power required for cutting is also very small. There is no loss of wood and there is no need for auxiliary equipment such as dust collectors, as there is no wood chips, wood powder, etc. generated during the sawing process or finishing process. Dust collection noise is also eliminated, improving the working environment.

For this reason, it is suitable for unidirectional cutting in plate bodies such as veneer, laminated wood, and lumber in which the main fibers are oriented in one direction, and for bidirectional cutting in plate bodies such as plywood in which fibers are orthogonally laminated.

Furthermore, since the cylindrical body facing the cutting blade is arranged with its axis and center deviated toward the delivery side, the product side of the plate to be cut, which was impossible with the slitter cutting method, Since it allows for horizontal conveyance and reliably prevents delamination at the edge of the product that has an adhesive layer, it is suitable for cutting the edges of plates, especially for vertical and horizontal cutting, which is the final finishing process of plywood.

[Brief explanation of the drawing]

Fig. 1 is a side view of the conventional device, Fig. 2 is an explanatory diagram showing the cutting state, Fig. 3 is a plan view showing an embodiment of the cutting blade according to the present invention, and Fig. 4 is Fig. 8 A-A. ＠An enlarged view in the direction of arrows, Fig. 5A to C are cutaway plan views showing the embodiments at the same location, Fig. 6A is a view taken along the line B-B of Fig. 5A, and Fig. 6B is a view of the 5th C-C in diagram B
A view taken along the line, Figure 6C is a view taken along the line C0-D in Figure 5, and Figure 7.
The figure is a side view showing an embodiment of the first invention, Fig. 8 is a front view of the same, Fig. 9 is a side view showing an embodiment of the same, and Fig. 1θ is a side view showing an embodiment of the second invention. Figure 11 is the same front view,
FIG. 12 is a side view showing an example of the same location. 12...Curved surface, 12'...Slanted surface 1.1
8.18'...Groove, 15.21...Shaft, 16
...Cutting blade, 17...Blade stand, 19...
Cylindrical body, 22... Plate body, 28... Cutting position,
24... Transfer device patent applicant Taihei Seisakusho Co., Ltd. (18) k, '#7□ 4

Claims (1)

[Claims] 1. The cutting edge 5 portion is formed in an annular shape with a constant inclination angle on the periphery, and the back surface of the cutting edge portion has a curved surface or A cutting blade in which a plurality of grooves having an inclined surface are carved at arbitrary intervals, and a blade holder having a constant shape facing the back surface of the cutting edge of the cutting blade.
1. A cutting device characterized in that the cutting device is arranged so that the two parts are partially polymerized and in contact with each other. 2. The cutting device according to claim 1, wherein the cutting blade is arranged above and the cutting edge stand is arranged below. 8. The cutting device according to claim 1, wherein the cutting blade is arranged below and the cutting edge stand is arranged above. 4. The cutting edge part is formed into an annular shape with a constant inclination angle on the periphery, and the cutting edge edge is cut from the center on the back side of the cutting edge part.
1iITOII Rupushi is Ichijo no Ryoko l: Trap V) 哄yl
A cutting blade in which a plurality of grooves having the angle q are carved at arbitrary intervals, and a cylindrical metal body facing toward the cutting blade has an axis whose phase is biased toward the loading side of the plate to be cut from the axis of the cutting blade. The cutting device is further characterized in that the cylindrical body is disposed so that the apex of the side surface of the cylindrical body is in partially overlapping contact with the back surface of the cutting edge of the cutting blade. 5. The cutting device according to claim 4, wherein the cutting blade is arranged above and the cylindrical body is arranged below. 6. The cutting device according to claim 4, wherein the cutting blade is arranged below and the cylindrical body is arranged above.