JPS5859797A - Cutter - 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 relates to a device for cutting a board having real fibers such as plywood or laminate, particularly for cutting side edges in the final finishing process.

Conventionally, when cutting a plate, a relatively long blade having the dimensions of the plate to be cut was used. In addition, various methods have been adopted, such as a slitter cut method consisting of a disc-shaped round blade.

The above-mentioned rotary can L method is advantageous because it operates quickly when cutting a veneer parallel to its fiber direction. It is impossible to cut plywood that has been laminated and bonded.
Alternatively, a precise cut cannot be obtained, and although the shear cut method described above can cut even relatively thick plates, the equipment cost is higher than that of the rotary cut method. However, there is a drawback that cutting requires time, and it is impossible to completely cut a long plate or a continuous plate.

In addition, the saw cutting method is widely used for cutting materials other than plywood, laminated materials, etc., as well as logs, regardless of board thickness. If precision is required, it is necessary to go through a finishing process using a planer, etc., and for this reason, during the finishing process using a planer, approximately 30% of wood chips and wood powder are removed in one pass during sawing. This has led to low yields and a loss of leisure time.

Furthermore, when cutting a plate using the slitter cutting method VC, the plate dimensions cannot be adjusted, which is impossible with the rotary cut and shear cassette methods, and the yield decreases due to &Il < 1 night in the saw cutting method. However, the cut surface of the plate is rougher than in the above-mentioned saw cutting method, and delamination is more likely to occur in plates with adhesive layers, such as plywood and laminated materials.

That is, this slitter cutting method is as shown in Figure 1.
Normally, a pair of upper and lower disc-shaped round blades 1.2 are placed facing each other with their axes aligned up and down, and the round blades 1 and 2 are moved in opposite directions at the same speed as the loading speed of the plate 3. The plate 8 is cut by rotating.

However, according to this method, the plate 8 is forcibly transferred from horizontal conveyance to the circumferential surface of the upper round blades 1 and 2 at the cutting position, and is conveyed and cut while exhibiting a curved state. In the board such as plywood having the above-mentioned adhesive layer,
The veneer of each layer is instantaneously compressed and deformed, and its fiber structure is locally destroyed, resulting in peeling between the contact layers.

Furthermore, if the direction in which the plate 3 is carried in and the direction of the fibers in the plate 3 are the same, the fibers held together by the round blade 1.2 will sequentially cause tip cracking 4 at the same time as the cutting starts, and the plate 3 will continue. During transportation, these four portions are torn off and damaged, and the cut surface is not straight but has an uneven shape, which significantly reduces the product value.

The board 3 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 tip cracks 4, and further, delamination occurs at the cut edges.

The present invention is based on a cutting blade capable of tearing the main fibers of a plate body, and the axis of a circular receiving blade facing the cutting blade is offset, and the two are partially joined. (5) The cutting surface of the plate is made to be good by setting the angle at which the two intersect.

A cutting edge surface 11 of a round blade 10 having an annular cutting edge portion with a constant inclination angle on the periphery is provided with a cross-sectional shape at least facing the rotation direction from the middle uO of the round blade 10 to the edge of the cutting edge. A plurality of fg 18 having a constant curved surface 12 are carved at arbitrary intervals, and a through hole 14 is bored in the middle/0 part, and a shaft 15 is fitted into the through hole 14 so that it can rotate freely. A cutting blade 16 is created.

Incidentally, instead of the skin 13 having the curved surface 12, FIG.
C to C and FIGS. 6A to CVc boss t, tU <It is also possible to use r41B' having an IIA surface whose cross-sectional shape is constant in the direction of rotation.

A circular receiving blade 17 is disposed facing the cutting blade 16 so as to partially overlap and intersect with the cutting edge surface 11 thereof, and the circular receiving blade 17 has a shaft 8 fitted in the middle/0 part. The awn is rotatable in the opposite direction to the rotational direction of the cutting blade 16, and consists of a round blade 19 or a cylindrical body 20 having an annular cutting edge portion with a constant circumferential edge formed obliquely.

(6) The relative arrangement of the cutting blade 16 and the circular receiving blade 17, especially the axis/U position thereof, should be such that the axis and the U position of the cutting blade 16 are aligned from the center of the axis 15 of the cutting blade 16 to the loading side of the plate 21 to be cut. The center of the shaft 18 of the circular receiving blade ■7 is positioned by biasing the circular receiving blade ■7, and each center of rotation is shifted, and the apex of the circular receiving blade 17 is made to be the intersection point P with the back surface 11 of the cutting edge of the cutting blade 16. .

Therefore, when the circular receiving blade 17 is made into a round blade 19, the cutting edge surface 22 thereof, and when it is made into a cylindrical body 20, its side surface 23 (il-1 the cutting edge back surface 11 of the cutting blade 16)
In this case, the axes of each of the blades are offset, and the blades are arranged so that they overlap and intersect with each other, and the cutting blade 16 and the circular receiving blade 1
The upper F facing position of 7 is when the cutting blade 16 is placed upward, the circular receiving blade 17 is placed downward, and 1 is opposite when the cutting blade 16 is placed facing F.
The circular receiving blade 17 is disposed upward, and both can be disposed reversibly in a +H position.

Furthermore, the amount of intersection H where the cutting blade 16 and the circular receiving blade 17 partially meet will increase in proportion to the amount of increase as each diameter increases, but basically, when the plate body 21 is brought in angle a
This angle α is defined by the half-fr tangent T from the middle bo of the cutting blade 16 to the intersection P, and the radius from the center O' of the circular receiving blade 17 to the intersection P. It is represented by the angle α between r' and the tangent T', and this angle α is set to more than 10 degrees and less than 18 degrees.

Further, a cutting position 2 consisting of the cutting blade 16 and the circular receiving blade 17
A conveying device 25 such as a caterpillar, rollers, or a belt conveyor is placed close to the loading and unloading sides of the plate 21 of No. 4.

Next, the action will be explained.

When the circular receiving blade 17 is located below, the tip of the plate body 21 carried in via the conveying device 25 has its lower surface once in contact with the circular receiving blade 17, and then its upper surface contacts the cutting blade 16. When the oval receiving blade 17 is located above, the upper surface of the oval receiving blade 17 contacts the circular receiving blade 17, and then the -r surface contacts the cutting blade 16, so that both It is carried into the cutting position 24.

At the cutting position 24, the axis of the cutting blade 16 is shifted toward the carrying-in side, and the circular receiving blade 17, which becomes the introduction part of the plate body 21,
Since it is rotated about the shaft 18 in the opposite direction to the cutting blade 16, the apex with the circular receiving blade 17, that is, the intersection point Pi with the cutting blade 16
At this point, cutting of the plate body 21 is started by the cutting blade 16 rotating at a constant speed.

During cutting, the cutting edge of the rotating cutting blade 16 intervenes in the fiber portion of the plate body 21 parallel to the conveyance direction, and inertia tends to act to cause the fiber portion to split 4 over a certain length. However, due to the curved portion 12 of the grooves 13, 18', which are carved at arbitrary intervals on the circumferential edge of the cutting blade 16, the plate body 2 that is about to be split at the tip 4,
1 fibers are torn into fine lines each time, the occurrence of tip cracks 4 is instantaneously prevented, and the plate body 21 can be cut well.

The plate body 21 is divided into a product 21a and an ear scrap 21b.
a is horizontally transported as it is and delivered to the transport device 25,
In addition, the ear scraps 211) are regulated to follow the rotational stress of the circular receiving blade 17, and when the circular receiving blade 17 is located below, it moves diagonally downward, and when it is located above (9), it moves slightly upward diagonally. Each is ejected while elastically returning.

At this time, the plate body 21 is located at the apex of the circular receiving blade 17, that is, the cutting blade 1
At the intersection point P with the cutting edge 6, the product 21a is cut by the rotation of the cutting blade 16, but since the product 21a to be cut is always kept in a horizontal position, there is a cutting point 1 at the cutting edge.
The pressure stress of hemorrhoids does not act, and there is no peeling of the adhesive, making it straight and beautiful.

The above-mentioned cutting condition is continuously stable if the originally set alternating pressure H1, that is, the carry-in angle a exceeds 10 degrees and is set to 18 degrees to the main shrine, but the temporary If H is too small, that is, if the carry-in angle a is set to less than 10 degrees,
The cutting blade 16 and the circular receiving blade 17 will mesh with each other due to vibrations during the 1!4J rotation, resulting in damage to the cutting edge.On the other hand, if the crossing amount H is excessive, that is, if the carry-in angle α is set to 18 degrees or more, , each blade edge bites into the plate body 21 excessively, and while the plate body 21 is being cut, the cut edge scraps 21
Because the discharge slope of 'b becomes steep, there is a gap in the middle of cutting (10
) The action of peeling off the fibers of the product 21a results in an adverse effect on the cut surface.

As described above, according to the present invention, when cutting a board having wood #&fibre, the tip cracking of the fibers that occurs during cutting can be prevented by using a plurality of grooves carved with a slack spacing device on the back surface of the cutting edge of the cutting blade. , can be torn according to the rules each time, and the cutting blade has +
H The amount of difference H1 between the opposing circular receiving blades, that is, the loading angle α of the plate
Since the angle is set at 18 degrees, exceeding 10 degrees, it is possible to transport the product and remove the shavings smoothly during cutting, resulting in a more beautiful cut surface compared to the above-mentioned methods. The power required at the time is also small, and there is no loss of saw grooves, etc., which is caused by the saw cutting method, which not only improves the yield, but also
Since there is no wood shavings, wood powder, etc. generated during the first inspection or finishing process, there is no need for incidental equipment for the dust collector, which also eliminates dust collection noise and improves the working environment. It is.

It is desirable to horizontally transport the product side of the plate to be cut, which is impossible with the slitter cutting method described above11).
- In order to reliably prevent delamination at the edges of the product that has a contact M layer, vertical cutting is performed in the final finishing process of cutting the edge of the board, cutting the plate, and finalizing the plywood. suitable for

[Brief explanation of the drawing]

Fig. 1 is a side view of the conventional device H, 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. 3A. - Enlarged view of line A, Fig. 5A
Figure 6A is a cutaway plan view of the construction site of the same location, Figure 6A is a view of Figure 5A (DE-B#j!), Figure 6B is a
C-C Tsuki arrow view of Figure B, Figure 6C is L)-D of Figure 5C
Fig. 7 is a side view showing one embodiment of the present invention, Fig. 8 is a diagram showing the same pressure at 1 m, Fig. 9 is an encirclement diagram with a circular receiving blade as a whole cylindrical body, and Fig. 10 is a diagram showing the same pressure. 11411 views of the entire case of Jinototsu,
FIG. 11 is a schematic explanatory diagram showing the amount of difference H. 12...Curved part, 12'...1 round fee] m1
13.18'...Groove, 15.18...Shaft, 1
6... Cutting blade, I7... Circular receiving blade, (12) 19... Round blade, 2o... Cylindrical body, 21...
... Plate body, 24 ... Cutting position, 25 ...
Transfer device patent applicant: Taihei Seisakusho Co., Ltd. (13) Wa Akira ○

Claims (1)

[Claims] 1. The cutting edge portion is formed into an annular shape with a constant inclination angle on the periphery, and the back surface of the cutting edge portion has a curved or inclined surface with a constant cross-sectional shape from the center to the edge of the cutting edge. A cutting blade in which a plurality of grooves with a surface are carved at arbitrary intervals is provided with a circular receiving blade whose axis is offset in phase toward the loading side of the plate that can be cut from the axis of the cutting blade. The apexes of the circular receiving blades are arranged so as to intersect with the back surfaces of the cutting edges of the cutting blades, and between the tangents of each radius from the centers of the cutting blades and the circular receiving blades to the intersections. A cutting device characterized in that the angle formed by the is set to exceed 10 degrees to 18 degrees US. 2. The cutting scissors (1) arrangement according to claim 1, wherein the cutting blade is arranged above and the circular receiving blade is arranged below. 3. The device according to claim 1, wherein the cutting blade is arranged below and the circular receiving blade is arranged above. 4. The circular receiving blade is a round blade having an annular cutting edge portion whose circumference is formed with a constant fAM, and the back surface of the cutting edge of the round blade and the back surface of the cutting blade are arranged so as to partially intersect with each other. A cutting device according to claim 1, 2, or 3. 5. The circular receiving blade is a cylindrical body, and the side surface of the cylindrical body and the back surface of the cutting edge of the cutting blade are partially intersected and straightened by lJd. Section 3: Cutting device for war.