JPH03153302A - Drive control method and its device for carrying-in conveyor in veneer cutting machine - Google Patents

Abstract

PURPOSE:To perform stably and reliably a desired parallel cutting action by eliminating a trapezoidal cutting phenomenon by restraining forcibly backlash, by a method wherein a one-way rotary clutch whose outer ring is fixed to a machine frame is fitted to a driving shaft of a carrying-in conveyor. CONSTITUTION:Backlash of carrying-in conveyers 2a, 2b toward an anti-carrying direction side is restrained forcibly with axial fitting of a one-way rotary clutch 5 and fixation of an outer ring to an outer ring to its machine frame so that only a one side excessive backward movement phenomenon with a difference between right and left inertia of waste veneers 12 which are to become scraps whose irregular fringe is left behind is not generated with the backlash acting upon an anti-carrying direction side, in a rear end cutting process with pinch holding and carrying of the rear drive carrying-in conveyors 2a, 2b. A product 6 cut into an inch width is cut at the same widths laterally and in parallel with each other longitudinally. An irregular fringe whose one side is narrow and other side is wide, which is apt to occur frequently at the time of cutting of a veneer 1 having an ordinary irregular fringe is left behind. Then even at the time of pinching and carrying of the waste veneers 12 during an edge cutting process, the pinching and carrying can be performed in parallel with each other laterally by eliminating influence with a difference between its right and left inertia.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a method in which a veneer veneer having irregular edges is intermittently pinched and conveyed in the direction orthogonal to the fiber direction, and then made into a product with a finite width. The present invention relates to a drive control method for an input conveyor in a veneer cutting machine and an apparatus therefor.

[Conventional technology]

As shown in FIG. 3, a conventional veneer cutting machine 3 comprising a movable blade 3a and a fixed blade 3b cuts a veneer sheet having irregular edges. The veneer cutting process [
The front and back of 13 are divided into rear-driven carry-in conveyors 2a, 2b and front-driven carry-out conveyors 7a, 7b,
At least before and after the veneer cutting 813, a chip removal mechanism is installed outside the machine, so the drive control device that is fixedly installed is moved away from the rear drive conveyor 2a, 2b so that it can freely vibrate. Driven unloading conveyor 7a,
7b equipment was required. Furthermore, an electromagnetic clutch brake 9a is provided on the drive shaft 4 of the rear-driven carry-in conveyors 2a, 2b and the drive shaft 8 of the forward-driven carry-in conveyors 7a, 7b, respectively.

9b, an intermittent drive mechanism consisting of a speed reducer 10, a motor 11, etc. are mounted on a shaft to constitute a drive control device for the carry-in and carry-out conveyors.

[Problem to be solved by the invention]

As mentioned above, the cutting mode of the drive control device of the carry-in conveyor in the conventional veneer cutting machine is as shown in the conventional example shown in FIG.
Since the intermittent drive mechanism consisting of a speed reducer 10 and a motor 11 is mounted on a shaft, backlash of the drive system that occurs during intermittent conveyance of the rear-driven input conveyors 2a and 2b, especially due to the rear drive Due to the severe backlash of the conveyor body, which tends to loosen, a significant deviation S occurs in the left and right conveyance amount of the scrap veneer 12, which should become chips with irregular edges remaining during the rear end cutting process. Since the front end cut portion of the product 6 is conveyed while being held in a wide state as a whole, the deviation S does not occur in the front end cutting process, but the trailing edge cut portion of the product 6 is cut to a predetermined width W on one side. , the other side of the product 6 is moved back in the direction opposite to the conveyance direction from the predetermined cutting position indicated by the broken line by the difference in inertia between the left and right sides. Only the trailing edge cut on the side with wide irregular edges is W+S
In other words, the product 6 is cut into a trapezoidal shape and transported, so in the later horizontal splicing process, the trapezoidal veneer is horizontally spliced, producing many curved products with irregular saw blades. There are rarely serious difficulties that lead to situations.

Therefore, in view of the above-mentioned conventional example, the present invention eliminates the trapezoidal cutting phenomenon caused by the backlash of the drive system that occurs during intermittent conveyance of the backward-driven input conveyor, especially the severe backlash of the conveyor body that tends to loosen due to the backward drive. In order to forcibly suppress backlash in the opposite direction of conveyance, a -5 direction rotary clutch having an outer ring fixed to the machine frame is mounted on the drive shaft of the carrying-in conveyor, and the one-way rotary clutch By fixing the shaft and its outer ring to the machine frame, the backlash of the carrying-in conveyor in the opposite direction is forcibly suppressed, thereby eliminating the trapezoid cutting phenomenon and stabilizing the desired parallel cutting operation. The purpose is to ensure that this is carried out reliably.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a veneer cutting machine equipped with a backward-driven carry-in conveyor that intermittently pinches and conveys veneer veneers in a direction perpendicular to the fiber direction. A carry-in conveyor for a veneer cutting machine, in which a -5 direction rotary clutch is mounted on the drive shaft of the rear-driven carry-in conveyor and an outer ring is fixed to the machine frame so that backlash in the transport direction can be forcibly suppressed. The present invention is comprised of a drive control method and an apparatus thereof.

[For production]

Since the present invention is configured as described above, a veneer veneer having an irregular edge is intermittently pinched and conveyed in a direction perpendicular to the fiber direction by an incoming conveyor, and the irregular edge is removed by a limit switch, a photoelectric Detected by a veneer detector consisting of a switch, etc., and using a cutting signal of a certain width that is the maximum effective width, the front end cut part and the rear end cut part are cut separately by a veneer cutting machine, and the front and rear chips are carried in or The device is designed so that the vibration of the carry-out conveyor removes the product to the outside and supplies only products with a certain width to the subsequent horizontal stripping process.

In the above-mentioned veneer cutting process, in order to remove the cutting chips from the machine, the inlet conveyor and the outlet conveyor are installed separately, and the inlet conveyor has to be installed as a rear-drive type. Therefore, the carry-in conveyor is affected by the backlash of the drive system due to intermittent conveyance more than the carry-out conveyor, and in particular, the severe backlash of the conveyor body, which tends to loosen due to the backward drive, causes problems in the rear end cutting process. There was a significant deviation in the amount of left and right conveyance of the scrap veneer, which should become chips with regular edges remaining, resulting in a situation where a product with a certain width was cut into a trapezoidal shape.

Therefore, the present invention aims to minimize the influence of backlash on the drive system that occurs during intermittent conveyance of this kind of rear-drive input conveyor. By installing a one-way rotation clutch on the drive shaft of the carrying-in conveyor and fixing the outer ring to the machine frame, it is possible to forcibly suppress the influence of loosening of the main body of the carrying-in conveyor only when cutting the rear end. Irregular left and right backlash in the direction opposite to the transport direction when cutting the rear end can be substantially eliminated. Incidentally, even if the one-way rotary clutch is mounted on the drive shaft of the loading conveyor and its outer ring is fixed to the machine frame, a restraining action will occur only on the side opposite to the transport direction, and backlash will occur on the transport direction side. Although there is no way to prevent this, when cutting the front end of a product with a certain width, the following whole product is conveyed in a wide state, so when backlash occurs in the conveyance direction, the whole body moves parallel and becomes a trapezoid. The present invention has confirmed the fact that there is no habit of being disconnected, and the present invention has become a simple equipment that only requires a one-way rotation clutch that produces a restraining action only on the side opposite to the conveyance direction of the conveyor. Similarly, the reason why the carry-out conveyor is not equipped with backlash elimination means is that the products of a certain width that are pinched and conveyed by the carry-out conveyor are cut parallel to each other at the front and back, so a difference in inertia occurs between the left and right sides. This is for the reason that no parallel movement occurs, and therefore no non-parallel movement occurs.

〔Example〕

FIG. 1 shows an example of an embodiment of the present invention, in which a veneer veneer 1 having irregular edges is intermittently pinched and conveyed by backward-driven carry-in conveyors 2a and 2b. The intermittent pinching conveyance of the rear-driven carry-in conveyors 2a and 2b is
A braking action is generated on the side opposite to the conveying direction that is mounted on the drive shaft 4 of the carry-in conveyors 2a, 2b, that is, the electromagnetic clutch brake on the carry-in side is generated via a one-way rotary clutch 5 whose outer ring is fixed to the machine frame. 9a, reducer 10 and motor 11
or a servo motor in place of this type of intermittent drive mechanism, the front irregular edge of the veneer veneer 1 being pinched and conveyed by the rear-driven carry-in conveyors 2a, 2b is moved by the movable blade 3a. Each time a veneer is carried directly under the veneer cutting machine 3 consisting of a fixed blade 3b, its irregular edges are detected by a veneer detector consisting of a limit switch, a photoelectric switch, etc., and its conveyance is stopped. The front irregular edge is cut by the veneer cutting machine 3, and the chips generated at that time are transferred to a forward-driven carry-out conveyor 7a.

7b is opened, and the conveyors 2a, 2b, and 7a fall directly below and separate.

When a product 6 of a certain width is pinched and conveyed by the veneer 7b, its rear irregular edge is detected by the veneer detector and its conveyance is stopped, and the veneer cutter 3 cuts the aforementioned front irregular edge. Cutting and layer separation are carried out in the same manner as in the case of regular edges, and the product 6 of a certain width is intermittently carried out to the subsequent process on the forward-driven carrying-out conveyors 7a, 7b.

The intermittent nipping conveyance of the forward-driven discharge conveyors 7a and 7b is carried out by an intermittent drive mechanism consisting of an electromagnetic clutch brake 9b mounted on the drive shaft 8 of the discharge conveyors 7a and 7b, the speed reducer 10, and the motor 11. , or by a servo motor or the like instead of this type of intermittent drive mechanism.

Accordingly, said backward-driven input conveyor 2a.

The manner in which the veneer veneer 1 having irregular edges is cut by the forward-driven carry-out conveyors 2a and 2b is as illustrated in FIG.
In the process of cutting the rear end of the veneer 2b by pinching and conveying it, an excessive retreating phenomenon on one side only acts on the side opposite to the conveyance direction due to the difference in inertia between the left and right sides of the scrap veneer 12 that should become chips with irregular edges remaining. Since the backlash of the carry-in conveyors 2a, 2b in the opposite direction of conveyance is completely suppressed by the shaft mounting of the one-way rotary clutch 5 and its outer ring fixed to the machine frame, the sizable width W is prevented from occurring due to lash. The cut product 6 is cut with the same width on the left and right, and parallel to the front and back, and the - side is narrow and the other side is wide and irregular, which often occurs when cutting veneer veneer 1 that has normal irregular edges. Even in the case of pinching and conveying the scrap veneer 12 in the process of cutting the rear end with the edge remaining, the present invention makes it possible for the first time to carry out the pinching and conveyance in parallel to the left and right by eliminating the influence of the difference in inertia between the left and right sides. .

(Effects of the Invention) As explained above, the present invention solves the problem of backlash in the drive system that occurs during intermittent conveyance of the rear-driven carry-in conveyor.
In particular, in order to prevent severe backlash of the conveyor body, which tends to loosen due to backward drive, a one-way rotary clutch whose outer ring is fixed to the machine frame is mounted on the drive shaft of the carry-in conveyor. By fixing the outer ring to the shaft and machine frame, the backlash of the conveyor in the opposite direction is forcibly suppressed, thereby eliminating the trapezoid cutting phenomenon and stabilizing the desired parallel cutting operation. This invention was able to be carried out reliably, and it is an extremely effective invention in terms of the economic efficiency due to its simple equipment and the production of high-quality side-seamed products.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the drive control mechanism of the present invention, and Figure 2 is an explanatory diagram of the drive control mechanism of the present invention.
FIG. 3 is an explanatory diagram of a conventional drive control mechanism, and FIG. 4 is an explanatory diagram of the cutting mode shown in FIG. 1...Plywood veneer, 2a, 2b...Incoming conveyor,
3...Single plate cutting machine, 4...Drive shaft, 5...One-way rotation clutch

Claims (1)

[Scope of Claims] 1. A veneer cutting machine (3) equipped with a backward-driven carry-in conveyor (2a, 2b) that intermittently pinches and conveys a veneer veneer (1) in a direction perpendicular to the fiber direction; A method for controlling the drive of a carry-in conveyor in a veneer cutting machine, characterized in that backlash of the rear-driven carry-in conveyor (2a, 2b) in the opposite direction of conveyance is forcibly restrained. 2. In a veneer cutting machine (3) equipped with a backward-driven carry-in conveyor (2a, 2b) that intermittently pinches and conveys the veneer veneer (1) in a direction perpendicular to the fiber direction, the backward-driven carry-in conveyor ( A drive control device for a carry-in conveyor in a veneer cutting machine, characterized in that a one-way rotation clutch (5) is mounted on the drive shaft (4) of the veneer cutting machine (2a, 2b), and an outer ring is fixed to the machine frame.