JPH09150402A - Cut-off device of veneer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a veneer clipper, which is excellent in high speed responsiveness, realize the exact separation of the defective part of a veneer, prevent a product from falling down, can be safely carried, has a simple mechanism and is excellent in performance and economical efficiency. SOLUTION: In this device, on both sides of an anvil roll 1, veneer 17 feeding and deliverying conveyors 15 and 16 are respectively arranged and, a veneer holding-down roll and a leading and a trailing edge part cutting knives 5 and 10 are respectively arranged. In this case, slitters 2, 8a, 8b, 13a and 13b, which cut off the defective part of the veneer 17 normal to its fiber direction, are provided nearly on the same axis line as that of the veneer holding-down roll independently and vertically movably and respectively coaxially to the leading and the trailing edge part cutting knives 5 and 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a rotary race,
For irregular veneer veneer that is cut and discharged by a slicer, etc., check for irregularities in the edge lines at the front and rear edges, or for defective parts of unequal thickness or for defective parts such as cracks or knot holes in the middle part. While cutting off, cut into high-speed products with a predetermined size or products with a certain width, and cut products and chips are automatically separated in the discharge process so that only the products are selectively discharged to the subsequent process. It is about a veneer clipper.

[0002]

2. Description of the Related Art As a conventional cutting device of this type, there is one having a pressing roll provided with a pressing device before and after it, such as a cutting device for a veneer veneer of Japanese Utility Model Publication No. 53-32939. As a cutting device which also has a scrap separation function, there is known a cutting device having a knife on an anvil roll and a slitter on the carrying-in side of the knife, such as Japanese Patent Publication No. 53-42920.

[0003]

However, in the above-mentioned prior art, in the former case, each of the cutting devices provided on one anvil roll simply cuts the defective portions before and after the veneer veneer. Yes, it does not have a function to remove defective parts that occur in the front and back due to cutting, and the defective parts that have been cut are not uniform in length on the left and right and in the center, so they are wide when they are delivered to the conveyor. Even if one is normally transported, the other one, which is narrower, is delayed and often overlaps on the subsequent non-defective part, and the sorting device in the subsequent process cannot accurately separate the product and the waste. And the latter case is due to the associated control of a cam that makes one-half revolution per revolution of a mechanically positive crank, so it is at a low speed, ie 20-30 m / mi.
The cutting process at the conveying speed of about n is the limit, and the cutting process at a higher speed cannot be dealt with.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and veneer veneer loading and unloading conveyors are arranged on both sides of the anvil roll, and the anvil roll is used. Of a veneer veneer press roll that can be moved up and down on the claw and a veneer veneer veneer having a knife for cutting the front and rear edges of the veneer veneer on each side of the veneer veneer press roll. In the cutting device, a slitter that divides the defective portion of the veneer veneer orthogonal to the fiber direction is separately provided on the same axis as the veneer veneer pressing roll, and can be moved up and down, and the veneer veneer. The required number of coaxial blades are provided on the front and rear edge cutting knives, respectively.

[0005]

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

1 and 2 show an embodiment of the present invention. FIG. 1 is a side view of the present invention, FIG. 2 is a plan view of the same,
FIG. 3 is a cutting mode diagram.

Reference numeral 1 denotes an anvil roll, which is not shown in the drawing but is rotatably driven by a driving device such as a servomotor which can be driven at a variable speed or at a constant speed. A slitter 2 is constructed so that the rotary blade 3 can be vertically moved by a reciprocating motion device 4 such as an air cylinder to selectively cut the veneer veneer 17 perpendicularly to the fiber direction. Reference numeral 5 is a knife for cutting the front edge portion, which is disposed on the carry-out side of the slitter-2 on the anvil roll 1. The leading edge cutting knife 5 is a thin-blade knife 7a, 7b for cutting the leading edge of a veneer veneer provided at two locations around a shaft 6 and the knife 7a,
A slitter 8 capable of cutting a defective portion located on the front side in the rotational direction at the time of cutting 7b at a predetermined position and a predetermined amount orthogonal to the fiber direction.
Servo motor capable of controlling half rotations of a and 8b and the shaft 6 each time
Intermittent drive device 9 consisting of a motor, an electromagnetic clutch brake, etc.
It is composed of Reference numeral 10 denotes a trailing edge cutting knife which is arranged on the carry-in side of the slitter-2 on the anvil roll 1. Similar to the front edge cutting knife 5, the rear edge cutting knife 10 is a thin-blade knife 12a, 12 for cutting the rear edge of a veneer veneer provided in two places around a shaft 11 respectively.
b and the knives 12a, 12b, a defective portion located on the rear side in the rotational direction at the time of cutting is orthogonal to the fiber direction at predetermined places, slitters 13a, 13b capable of dividing by a predetermined amount, and the shaft 11 can be controlled by half rotation each time. The intermittent drive device 14 is composed of a motor, an electromagnetic clutch brake, and the like.

In the figure, the knives 7a and 7b are arranged at two places, but in some cases they may be provided at one place, and the slitter 8 is provided.
Needless to say, a and 8b may be provided in one or more places. Further, the rotary blade 3 of the slitter 2 is best connected so as to interlock with the drive of the anvil roll 1. However, in some cases, the rotary blade 3 may be driven separately and accelerated or decelerated from the anvil roll 1. Good. Conveyors 15 and 16 and a conveyance guide 15 for continuing the conveyance of the conveyors 15 and 16 and the anvil roll 1 on the carry-in side and the carry-out side of the anvil roll 1, respectively.
a and 16a are provided. A photoelectric switch and a thickness switch for detecting a front edge and a rear edge of a plurality of veneer veneers 17 in a row in a direction orthogonal to the conveying direction on the carrying-in side conveyor 15 before a predetermined distance from the trailing edge cutting knife 10. A single-plate detector 19 composed of, for example, is provided. Reference numeral 20 denotes a control circuit, which discriminates the leading edge cutting portion X when the veneer veneer detection signals are transmitted from all the veneer detectors 19, and any one of the veneer veneer detection signals is no longer transmitted. When the trailing edge cutting point Y is discriminated and the memory is temporarily delayed, in the case of the slitter 2, the leading edge cutting point X arrives at the rotary blade 3 of the slitter 2 which is always lowered to be cut. An operation signal is transmitted to the reciprocating actuator 4 so as to be lifted at a position immediately before, and the reciprocating actuator 4 is controlled to be lifted at a position immediately after the trailing edge cutting point Y has passed. In the case of the leading edge cutting knife 5, when the leading edge cutting portion X arrives just below the leading edge cutting knife 5, an operation signal is transmitted to the intermittent driving device 9 to cut by the slitter 2. Defective fibers left behind Control is performed so that a portion orthogonal to the direction is divided by the slitter 8a and cut at the leading edge cutting portion X, and in the case of the trailing edge cutting knife 10, the trailing edge cutting portion Y is the trailing edge cutting knife 10. When it arrives immediately below, the operating signal is transmitted to the intermittent driving device 14 so as to cut the trailing edge cutting portion Y, and to control the subsequent defective portion orthogonal to the fiber direction by the slitter 12a.

Based on the above construction, the cutting mode will be described according to the flow of the veneer veneer 17 as shown in FIG. (1) The veneer veneer 17 conveyed by the conveyor 15 is first detected by the veneer veneer detector 19 at the leading edge cutting point X and the trailing edge cutting point Y, discriminated by the control circuit and temporarily stored. (2) The veneer veneer 17 on the conveyor 15 is the transport guide 1
The leading edge cutting portion X passes under the trailing edge cutting knife 10 and is normally lowered in a state where the leading edge cutting portion X is conveyed onto the anvil roll 1 via 5a and held by the veneer veneer pressing roll 21. Two rotary blades 3 divide the fiber in the direction orthogonal to the fiber direction. (3) Then, the leading edge cutting portion X is cut by the knife 7a of the leading edge cutting knife 5, and the defective portion Xa of the leading edge is divided by the slitter 8a. (4) When the trailing edge cutting point Y reaches the position just below the trailing edge cutting knife 10 by further continuing the conveyance, the trailing edge cutting point Y is cut by the knife 12a and the defective portion Y on the trailing edge side is cut.
A is also partially cut off at the same time. (5) When the defective portion is larger than the cutting area of the slitter 13a as shown in the figure, the remaining portion is divided by the rotary blade 3 of the slitter 2.

In the above operation, the leading edge cutting point X is the knife 7a, 7b of the leading edge cutting knife 5 and the trailing edge cutting point Y.
Are cut and divided alternately by the knives 12a and 12b of the trailing edge cutting knife 10, and the divided defective portions Xa and Ya of the leading edge and the trailing edge fall downward between the conveyors 16 on the unloading side and only the product 18 is cut. However, the conveyance is accurately continued to the subsequent process.

Reference numeral 1a is an anvil for a slitter, which is made of plastic, polyamide resin or the like forming a receiving groove 3a for the rotary blade 3 of the slitter 2. 21 is a veneer veneer press roll, which is a slitter 2 as shown in FIG.
It is arranged on both sides of the rotary blade 3 separately from the slitter 2 and is for feeding the veneer veneer 19 together with the anvil roll 1 under pressure. Although it is normally used in a pressure-feeding state and is not shown in case of trouble or the like, it is releasable by a conventionally known reciprocating actuator such as an air cylinder, and the number thereof is arbitrary.

Incidentally, when cutting cracks, node holes, etc. which occur in the middle, the size of each slitter 8a, 8b,
If it is smaller than the predetermined amount of 13a, 13b, it is better to control it to pass without cutting and to process it in a subsequent processing step such as another lateral stripping step, which improves productivity and yield by preventing troubles. Can contribute.

[0013]

As described above, according to the present invention, the veneer veneer loading and unloading conveyors are arranged on both sides of the anvil roll, and the vertical movement is possible on the anvil roll. In the cutting device for veneer veneer, wherein the veneer veneer press roll and the veneer veneer press roll are provided with cutting knives for cutting front and rear edges of the veneer veneer on both sides of the veneer veneer press roll. A slitter that divides the defective part of the plate orthogonally to the fiber direction can be moved up and down separately on the same axis as the veneer veneer press roll, and can be moved up and down, and cutting the front and rear edges of the veneer veneer. The required number of knives are coaxially installed, so it has excellent high-speed compatibility, and ensures accurate separation of defective parts on the leading edge and trailing edge and safe transportation without product dropout problems. In addition, since the entire mechanism can be greatly simplified, it is possible to quickly respond to troubles, which contributes to the improvement of productivity and has excellent performance and economical effects. .

[Brief description of the drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a plan view of the present invention,

FIG. 3 is a cutting correspondence diagram of the present invention.

[Explanation of symbols]

 1 Anvil Roll 1a Anvil for Slitter 2 Slitter 3 Rotating Blade 4 Reciprocating Actuator 5 Knife for Cutting Leading Edge 6 Shaft 7a Knife 7b Knife 8a Slitter 8b Slitter 9 Intermittent Driving Device 10 Shaft 11a 12a Knife 12b Knife 13a Slitter 13b Slitter 14 Intermittent drive device 15 Conveyor 15a Conveying guide 16 Conveyor 16a Conveying guide 17 Veneer veneer 18 Product 19 Veneer detector 20 Control circuit 21 Veneer veneer press roll X Leading edge cutting location Xa Leading edge defect Y Trailing edge cutting point Ya Trailing edge defect

Claims (1)

[Claims] 1. A veneer veneer press roll and a veneer veneer which are provided with veneer veneer loading and unloading conveyors on both sides of the anvil roll and are vertically movable on the anvil roll. In a veneer veneer cutting device in which knives for cutting the front and rear edges of the veneer veneer are arranged on both sides of the presser roll as a center, the defective part of the veneer veneer is orthogonal to the fiber direction. The slitter for dividing is provided separately on the same axis as the veneer veneer press roll, vertically movable, and provided on the front and rear edge cutting knives of the veneer veneer, respectively. Veneer veneer cutting device