JPH10305407A - Veneer cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a part replacement cycle for a cutting blade and a conveying roll thereby improving productivity, in a device for cutting a veneer by using a turning action-type cutting blade. SOLUTION: An upper and a lower anvil roll 13, 14 are alternately moved forward/backward against the turning action of a cutting blade 17 in each of a top to bottom and a bottom to top direction. For example, the veneer 12 is cut between the cutting blade 17 and the lower anvil roll 14 when the cutting blade 17 turns from top to bottom. In this case, the lower anvil roll 14 is set in a position where it can come into contact with the cutting blade 17 and the upper anvil roll 13 is set in a position where it is unable to come into contact with the cutting blade 17. Thus it is possible to limit the frequency of collision between the cutting blade 17 and the anvil rolls 13, 14 to once in a single cutting operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plywood manufacturing process in which a veneer sheet or the like obtained by turning a raw wood as a raw material is continuously cut to a fixed length.
Also, the present invention relates to a veneer cutting apparatus for selectively cutting a sized veneer having an effective length from an irregularly shaped bulk veneer whose front and rear edges are irregular.

[0002]

2. Description of the Related Art As an apparatus for continuously cutting a single veneer such as a sheet veneer turned from a log into a fixed length, for example, as shown in FIG. The veneer 3 is transported while being sandwiched therebetween, and the transport rolls 1,
There is a configuration in which the veneer 3 conveyed to a predetermined length from 2 is cut between the single roll 3 and the peripheral surface of the transport roll by a turning blade 4. In the veneer cutting apparatus having such a configuration, the cutting blade 4 is rotated from the top to the bottom or from the bottom to the top every time the veneer 3 is cut, thereby improving the efficiency of the veneer cutting operation.

In such an apparatus for cutting the veneer 3, the turning angle range of the cutting blade 4 is preferred in order to avoid the wear and damage of the cutting blade 4 and the transport rolls 1 and 2 and extend the life of the parts. In order to prioritize productivity when stopping the position just before touching the surfaces of the transport rolls 1 and 2, as shown in FIG. 8, as shown in FIG. It is conceivable that the vehicle is configured to be turned in a range in which it wraps (intersects). In the case of this configuration, the cutting blade 5 is elastically supported by the coil spring 6 so as to reduce the impact of the collision with, for example, the metal transport rolls 1 and 2 around the peripheral surface. The wear and damage of the peripheral surfaces of the rolls 1 and 2 are minimized.

However, if the turning range of the cutting blade 4 is stopped shortly before the position where the cutting blade 4 comes into contact with the surfaces of the transport rolls 1 and 2, reliable single veneer cutting cannot be guaranteed. There is a problem in that productivity is reduced, for example, the movement causes troubles in the transport system. On the other hand, when the cutting blade 5 is wrapped around the transport rolls 1 and 2,
Even if one cutting operation, that is, each time the cutting blade 5 is swung, the tip of the cutting blade 5 collides with the surface of each of the upper and lower transport rolls 1 and 2, and the impact is somewhat reduced by the coil spring 6. Wear of the cutting blade 5 and the transport rolls 1 and 2
There is a problem that the damage progresses from time to time and frequent replacement of parts is required. As a countermeasure, it is easy to increase the shock buffering force. However, if the shock buffering force is increased, the cutting ability of the veneer 3 is also reduced.

[0005]

As described above, in order to enhance the cutting performance of the veneer 3, it is advantageous to wrap the rotating cutting blade 5 with the peripheral surfaces of the transport rolls 1 and 2. In this case, the tip of the cutting blade 5 collides with the upper and lower surfaces of the transport rolls 1 and 2, respectively, and the cutting blade 5 and the transport rolls 1 and 2 are worn and damaged at a remarkable speed, and it is necessary to frequently replace parts. There was a problem that would occur.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the number of collisions between a cutting blade and a transport roll in one cutting operation is reduced to one. It is an object of the present invention to provide a single-plate cutting device capable of extending a part exchange cycle of a transport roll and improving productivity.

[0007]

In order to achieve the above object, a veneer cutting apparatus according to the present invention comprises: a pair of transport bodies that rotate and transport the veneer while holding the veneer; A revolving member which is supported reciprocally revolvably on the downstream side of the revolving member, and a revolving member having a fixed blade for cutting a veneer with the peripheral surface of one carrier corresponding to the revolving direction by revolving in each direction, and a revolving member. A carrier moving means for moving each carrier such that one carrier corresponding to the turning direction is alternately and sequentially located at a position where the carrier can contact the blade when the carrier is reciprocated. The veneer cutting device of the present invention is configured such that the veneer is transported while nipping the veneer by a pair of transporters, and the blade for cutting the veneer is reciprocatedly rotated by a revolving member having a fixed tip. The veneer is cut continuously on the peripheral surface of one of the transporting bodies corresponding to the turning direction of. At the time of cutting the veneer, one carrier corresponding to the turning direction of the turning member,
With the reciprocating rotation of the revolving member, the carrier is moved so as to be located at a position where the blade can come into contact with the blade alternately, and the other carrier contacts the blade with the reciprocating rotation of the revolving member sequentially. It is moved so that it is located in an impossible position. For this reason, the blade of the revolving member collides with the carrier only once in one cutting operation, and the component replacement cycle due to wear and damage of the cutting blade and the carrier roll can be extended.

[0008]

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

FIG. 1 is a side sectional view showing the structure of a veneer cutting apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the veneer veneer 1 delivered from the carry-in conveyor 11
The upper anvil roll 13 and the lower anvil roll 14 as a pair of upper and lower transport bodies for transporting while sandwiching the two, and the upper anvil roll 13 and the lower anvil roll 14 are individually reciprocated along the transport direction of the veneer veneer 12. An upper cylinder 15 and a lower cylinder 16 to be moved forward and backward;
And a cutting blade 17 for cutting the veneer veneer 12 that has come out between the upper and lower anvil rolls 13 and 14.

The cutting blade 17 is supported so as to be capable of reciprocating rotation within a predetermined angle range, and by an individual turning operation from top to bottom and from bottom to top, one of the upper and lower anvil rolls corresponding to the turning direction. The veneer veneer 12 is cut between itself and the peripheral surface of the veneer veneer. That is, the veneer veneer 12 is cut between the cutting blade 17 and the lower anvil roll 14 when the cutting blade 17 turns from top to bottom, and the cutting with the upper anvil roll 13 when the cutting blade 17 turns from bottom to top. The veneer veneer 12 is cut between them.

The angle range of the reciprocating rotation of the cutting blade 17 is as follows.
Each of the upper and lower anvil rolls 13 and 14 is slightly wider than the collision position with the upper and lower anvil rolls 13 and 14.
In each of the turning directions, after the collision with the peripheral surface of the anvil roll (single veneer cutting), the turning is continued in the same direction by a small angle. The cutting blade 17 is supported via an elastic member (not shown) such as a coil spring, and the elasticity of the elastic member causes the cutting blade 17 to slightly move in the direction of retracting from the peripheral surface of the anvil roll upon collision with the peripheral surface of the anvil roll. by doing,
It is possible to continue turning after collision with the peripheral surface of the anvil roll.

The veneer cut at the time of turning from below to above the cutting blade 17 is guided to the upper carry-out conveyor 18, and the cutting blade 17 is turned at the time of turning from above to below. An upper sorting section 20 and a lower sorting section 21 for guiding the cut veneer to the lower unloading conveyor 19 are provided.

Further, above the carry-in conveyor 11,
A detector 22 for detecting the shape of the veneer veneer 12, that is, its thickness, width, length, and the like, is provided. This detector 22
Is detected by the cutting blade 17, the upper and lower anvil rolls 1
Upper and lower cylinders 15 and 1 that respectively advance and retreat 3 and 14
It is output to a controller 23 that controls the operation of the cutting blade 6 and the cutting blade 17. The controller 23 controls the cutting of the veneer veneer 12 to a fixed length based on the detection signal from the detector 22 and the irregular bulk veneer whose front and rear edges are irregular as shown in FIG. From 24, control is performed to cut a sized veneer having an effective length.

The above-mentioned upper anvil roll 13 and lower anvil roll 14 are made of a metal such as aluminum having relatively soft characteristics or at least the surface of which is covered with an elastic material such as rubber. The cylinder 15 and the lower cylinder 16 are configured to be able to independently move in the reciprocating direction along the transport direction of the veneer veneer 12. Each anvil roll 1
The movement of the cutting blades 3 and 14 is performed by turning the cutting blade 1 around the roll surface.
7 is performed between a position where the contact is possible and a position where the contact is not possible. Here, the position where the roll peripheral surface and the turning locus of the tip of the cutting blade 17 overlap is defined as a contactable position, and the position where the roll is not overlapped is defined as an uncontactable position.

The forward and backward movement of each of the anvil rolls 13 and 14 is performed by a single cutting operation by the cutting blade 17, that is, the cutting blade 17.
Is controlled so as to be performed in response to the turning operation in each direction from top to bottom and bottom to top. That is, when turning the cutting blade 17 from the top to the bottom, the lower anvil roll 14
At this time, the lower anvil roll 14 is located at a position where it can come into contact with the cutting blade 17, and the upper anvil roll 13 is located at a position where it cannot come into contact with the cutting blade 17. (Upper anvil roll 13
Is retracted from the initial position. ). Similarly, when turning the cutting blade 17 upward from below, the veneer veneer 12 is cut with the upper anvil roll 13. At this time, the upper anvil roll 13 is positioned at a position where it can come into contact with the cutting blade 17. Then, the lower anvil roll 14 is located at a position where it cannot contact the cutting blade 17. Thus, the number of times that the cutting blade 17 and the anvil roll collide in one cutting operation is one. Next, a case in which the veneer veneer 12 is actually cut by the veneer cutting device configured as described above will be described.

In the entire process, for example, when a sheet-like veneer veneer 12 obtained by being turned from a log by a veneer race or the like is conveyed by a carry-in conveyor 11, a detector 22 is used.
Thereby, it is detected whether or not a veneer veneer 12 having a desired shape can be obtained. When it is determined that the desired shape is obtained, the conveyance of the veneer veneer 12 by the carry-in conveyor 11 is continued as it is, and the veneer veneer 12 is thereafter rotated by the upper anvil roll 13 and the lower anvil roll 14 so that the veneer veneer 12 is rotated. It is taken into the gap between the anvil roll 13 and the lower anvil roll 14. The veneer veneer 12 is conveyed by the rotation of the upper and lower anvil rolls 13 and 14 while being pinched in the carrying-out direction in which the cutting blade 17 is provided. Thereafter, when the veneer veneer 12 having a predetermined length is carried out from the upper and lower anvil rolls 13 and 14, the controller 23 based on the detection signal of the detector 22 is used.
3, the lower anvil roll 14 is moved through the lower cylinder 16 to the cutting blade 17 as shown in FIG.
The upper anvil roll 13 is positioned at a position where it can come into contact with the cutting blade 17 via the upper cylinder 15.
(The upper anvil roll 13 is retracted from the initial position). Next, the cutting blade 17 that has been rotated clockwise by a predetermined angle and stopped at a predetermined angle from the point at which it can contact the peripheral surface of the upper anvil roll 13 rotates counterclockwise toward the peripheral surface of the lower anvil roll 14. I do.

Then, the tip of the cutting blade 17 comes into contact with the surface of the veneer veneer 12 as shown in FIG. 4 and further collides with the peripheral surface of the lower anvil roll 14. It turns counterclockwise by an angle and stops at a position away from the peripheral surface of the lower anvil roll 14. At this time, the cutting of the veneer veneer 12 is started by the turning force of the turning of the cutting blade 17 and the conveying force of the upper and lower anvil rolls 13 and 14 for conveying the veneer veneer 12. further,
The tip of the cutting blade 17 turns counterclockwise by a slight angle even after the collision with the peripheral surface of the lower anvil roll 14 (single veneer cutting), thereby separating the veneer veneer 12 from the veneer veneer 12. The veneer veneer 12 can reliably cut a veneer having a desired shape. The direction of the cut veneer is regulated by the lower sorting portion 21 of the cutting blade 17, and the veneer is conveyed to the next step by the lower conveyer 19.

Then, the upper and lower anvil rolls 1
When the veneer veneer 12 having a predetermined length is again carried out of the veneer 3 and 14, the upper anvil roll 13 is moved upward by the control of the controller 23 based on the detection signal of the detector 22, for example, as shown in FIG. The lower anvil roll 14 is positioned at a position where it cannot contact the cutting blade 17 via the lower cylinder 16 while being positioned at a position where it can contact the cutting blade 17 via the cylinder 15. Next, the cutting blade 17, which has been rotated clockwise by a predetermined angle and stopped at a point where the lower anvil roll 14 could be contacted, rotates clockwise toward the peripheral surface of the upper anvil roll 13.

The tip of the cutting blade 17 comes into contact with the surface of the veneer veneer 12 as shown in FIG. 6 and further collides with the peripheral surface of the upper anvil roll 13. It turns only counterclockwise and stops at a position away from the peripheral surface of the upper anvil roll 13. At this time, the cutting of the veneer veneer 12 is started by the turning force of the turning of the cutting blade 17 and the conveying force of the upper and lower anvil rolls 13 and 14 for conveying the veneer veneer 12. Further, even after the tip of the cutting blade 17 collides with the peripheral surface of the upper anvil roll 13 (single veneer cutting), the veneer veneer 12 is separated from the veneer veneer 12 by turning clockwise by a slight angle. The action is added, and the veneer veneer 12 can reliably cut a veneer having a desired shape. Then, the veneer veneer 12 is cut while the traveling direction is regulated by the upper sorting section 20, and after the cutting, the cut veneer 12 is conveyed to the next step by the upper conveying conveyor 18. Then, while repeating the above operation, the veneer veneer 12 is cut into a desired shape one after another, and is conveyed to the next step.

According to the veneer cutting apparatus of this embodiment, the upper and lower anvil rolls 13 and 14 are alternately moved forward and backward in accordance with the turning operation of the cutting blade 17 from top to bottom and from bottom to top. By doing so, the cutting blade 1
The number of collisions between 7 and the anvil roll can be stopped at once. Thereby, the upper and lower anvil rolls 13,
Wear and damage of the cutting blade 14 and the cutting blade 17 can be minimized, and the component replacement cycle can be extended.

Further, while minimizing wear and damage between the upper and lower anvil rolls 13 and 14 and the cutting blade 17, cutting is performed within a range where the turning trajectory of the cutting blade 17 overlaps the peripheral surfaces of the upper and lower anvil rolls 13 and 14. Since the blade 17 is turned, an action of separating the veneer veneer 12 from the veneer veneer 12 is added, and the veneer veneer 12 can be reliably cut into a veneer veneer having a desired shape.

In this embodiment, the cutting of the veneer obtained by turning the raw wood and connecting the veneer to a sheet has been described. However, the veneer turned from the raw wood is shown in FIG. Needless to say, the present apparatus can also be used for cutting an irregularly shaped bulk veneer 24 having irregular front and rear edges obtained at the time of initial turning.

[0024]

As described above, according to the veneer cutting apparatus of the present invention, the carrier corresponding to the turning direction of the turning member is positioned at a position where it can contact the blade of the turning member. At the same time, the carrier that does not correspond to the turning direction of the turning member is located at a position where it cannot contact the blade of the turning member, so that the blade of the turning member and the carrier are The number of collisions can be stopped at once. Therefore, it is possible to minimize wear and damage of the blade of the revolving member and the carrier, and it is possible to prolong the component replacement cycle.

According to the veneer cutting apparatus of the present invention,
While minimizing the wear and damage of each carrier and the blade of the swing member, the veneer is swiveled within the range in which the swing trajectory of the blade of the swing member overlaps with the peripheral surface of each carrier, and the veneer is reliably formed. Since the cutting can be performed, no trouble is caused in the transport system due to, for example, turbulence of the uncut single plate, and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a veneer cutting apparatus used in an embodiment of the present invention.

FIG. 2 is a diagram showing an irregularly shaped bulk veneer whose front and rear edges are irregular.

FIG. 3 is a schematic diagram showing a state in which the cutting blade turns toward the peripheral surface of the lower anvil roll in the veneer cutting apparatus used in the embodiment of the present invention.

FIG. 4 is a schematic diagram showing a state in which a veneer veneer is cut by a cutting blade passing over a peripheral surface of a lower anvil roll in the veneer cutting device used in the embodiment of the present invention.

FIG. 5 is a schematic view showing a state in which the cutting blade turns toward the peripheral surface of the upper anvil roll in the veneer cutting apparatus used in the embodiment of the present invention.

FIG. 6 is a schematic view showing a state in which a veneer veneer is cut by a cutting blade passing over a peripheral surface of an upper anvil roll in the veneer cutting device used in the embodiment of the present invention.

FIG. 7 is a view schematically showing a conventional single-plate cutting apparatus in which a turning range of a cutting blade is stopped shortly before a position where the cutting blade comes into contact with the surface of each transport roll;

FIG. 8 is a view schematically showing a conventional cutting apparatus of a single plate type, in which a turning trajectory of a tip of a cutting blade turns in a range where the turning trajectory overlaps with a peripheral surface of each transport roll.

[Explanation of symbols]

 11 Carry-in conveyor 12 Veneer veneer 13 Upper anvil roll 14 Lower anvil roll 15 Upper cylinder 16 Lower cylinder 17 Cutting blade 18 Upper conveyer 19 Lower conveyer 20 upper sorting part 21 lower sorting part 22 detector 23 controller

Claims (1)

[Claims] 1. A pair of transporters that rotate and transport a veneer while sandwiching a veneer, and are reciprocally supported at a downstream side of the transporter, and correspond to a swivel direction by pivoting in each direction. A turning member to which a blade for cutting the veneer is fixed between the peripheral surface of the one carrier and the one carrier corresponding to the turning direction when the revolving member is reciprocated and swung; A veneer moving means for moving each of the vehicular bodies so as to be positioned at a position where the veneer can come into contact with the blade.