JPS6252684B2 - - Google Patents

Description

Detailed Description of the Invention (Object of the Invention) The present invention detects a defective part of a narrow veneer veneer being conveyed in a direction perpendicular to the fiber direction, and then stops the conveyance after conveying it to a cutting location. Then, at the cutting place, the conveyance is first stopped and the leading end face of the cut succeeding veneer is closely abutted against the rear end face of the preceding veneer, which is waiting. A veneer cross-splitting machine configured to resume conveyance after pasting a joining material to the abutting portion and joining the cross-splitting veneers in the form of a blind, where the so-called end-face abutting place is a sizing cutting place. This is related to the improvement of the fixed-length cutting device for an intermittent type veneer cross-cutting machine that is fixed at one location. With an intermittent type veneer horizontal splicing machine that is fixed at one location, when cutting the produced cross-spliced veneer into a fixed length using a standard length clipper, the influence of speed fluctuations due to the intermittent conveying operation is eliminated. At times, the accuracy of cutting to a fixed length fluctuated significantly and was low. In addition, this type of device is a prior art for improving the accuracy of cutting to a fixed length by avoiding the influence of speed fluctuations, which is well known in the past. One example is the application of the prior art to improve the accuracy of cutting to a fixed length by switching between two locations to stabilize the terminal conveyance speed and avoid the effects of speed fluctuations.
The present invention is a fundamental improvement on the method that could not be implemented because of the end face abutment location at only one location, that is, the present invention is a fundamental improvement on the end face abutment location at only one location and the location for cutting the horizontally spliced veneer to a specified length. In between, an adjustment conveyor is provided which allows the length of the process to be expanded and contracted by the tension applied to the side-splitting veneer, and the expansion and contraction of the adjustment conveyor is controlled by the tensioning action of a pinch roller on the carry-out conveyor. By automatically adjusting the amount of horizontal stripping veneer discharged and stored by the machine, the terminal conveyance speed is kept constant, and the accuracy of the standard length cutting by the standard length clipper is improved. This device is designed to significantly improve the performance.

(Structure of the Invention) As an example of implementation is shown in the drawings, the present invention is directed to irregular edges, cracks, and cracks to be cut and separated of a narrow veneer veneer 2 that is conveyed by an incoming conveyor 1 in a direction perpendicular to the fiber direction. Defects such as knotholes are detected by a large number of veneer detectors 3 installed in a line perpendicular to the conveying direction, and these are conveyed to the cutting location by a sized clipper 4 consisting of movable blades 4a, 4b and a fixed blade 4c. After that, the conveyance is stopped and cut to a specified width, and furthermore, at the cutting place, the conveyance is first stopped and the leading end surface of the cut succeeding veneer is tightly placed on the rear end surface of the preceding veneer that is waiting. At the same time, a joining material 5 such as hot-melt adhesive thread is cut into pieces or continuously pasted by a pasting machine 6 to the joined part to form a cross-stitched veneer 7 connected in the form of a blind. In an intermittent veneer cross-splitting machine, which is configured to restart its conveyance after splicing and whose end abutment location is fixed at one of the cutting locations, the veneer cross-splitting machine produces A movable blade 10b facing on a roller anvil 10a that detects the length of the side-splitting veneer 7 to be carried out by a length switch 9 installed on the carrying-out conveyor 8 and cuts it to a desired fixed length; An actuating device 10c such as an air cylinder that allows the blade 10b to move up and down.
A fixed length clipper 10 is disposed in front of the carry-out conveyor 8, and is constituted by a controller 10d that sends a vertical movement signal only once to the actuating device 10c. Further, between the fixed-length clipper 10 and the fixed-length clipper 4 of the veneer horizontal stripping machine, there is provided a device that can expand and contract the process length by the tension acting on the horizontal stripping veneer 7 during the unloading process, for example, as shown in the figure. As shown in FIG.
An adjustment conveyor 11 is provided, which is constituted by tension adjustment devices 11g, 11h, etc. such as counterweights attached to conveyors 1d and 11e, respectively.
Next, a pinch roller 12a is placed in front of the fixed length switch 9 at a position separated by a predetermined distance l corresponding to the conveyance distance commensurate with the start-up time of the carry-in conveyor 1 and the adjustment conveyor 11 , which are intermittently driven.
12b is installed, and the side-splitting veneer 7 on the carry-out conveyor 8 is conveyed by continuous driving over a predetermined distance l in synchronization with the speed of the carry-out conveyor 8. In this case, when the conveyance operation of the veneer cross-splitting machine installed in the previous stage is stopped, the process length of the adjustment conveyor 11 is adjusted to a predetermined distance l by the tension acting on the cross-splitting veneer 7 during each conveyance process. The side-splitting veneer 7 which is shortened by that amount and stored in excess is discharged onto the conveyance path. Furthermore, when the horizontally spun veneer 7 is divided directly below by the regular length cutting operation of the standard length clipper 10 , the tension acting on the horizontally spliced veneer 7 also disappears, so that the adjustment conveyor 11 The length is automatically adjusted to the elongated side again so that the side-splitting veneer 7 on the conveyance path is accommodated by a predetermined distance l.

(Effects of the Invention) Even if the present invention is an intermittent type veneer cross-cutting machine in which the end face abutment location configured as described above is fixed at only one location, which is the sizing cutting location, the present invention can be applied to only one location. The length of the process is set between the sized cutting place of the sized clipper 4 , which is the place where the end faces of By arranging an adjustment conveyor 11 that can be expanded and contracted by the tension applied to the plate 7, and controlling the expansion and contraction of the adjustment conveyor 11 by the tensile action of pinch rollers 12a and 12b on the carry-out conveyor 8, Regardless of the intermittent operation of the intermittent type veneer horizontal stripping machine, a predetermined distance l is set on the conveying path.
With an adjustment function that temporarily stores an equivalent amount of excess horizontally spun veneer 7 and then releases the excess horizontally spliced veneer 7 corresponding to a predetermined distance l as necessary each time the standard length is cut, the standard size can be cut. Side-splitting veneer 7 just before being cut according to the law
The terminal conveyance speed of at least the pinch roller 12
a, 12b to the length switch 9 is automatically adjusted so that the conveyance speed is precisely synchronized with the speed of the continuously driven conveyor 8 and is conveyed at a constant speed. This greatly improves the cutting accuracy when cutting to a fixed length, which was impossible with conventional equipment that only had one end-face abutment location due to speed fluctuations, and is extremely beneficial in terms of resource conservation. This invention has practical effects.

[Brief explanation of the drawing]

The figure is a side view showing an example of implementation of the present invention. 2... veneer veneer, 3... veneer detector, 4 ...
Size clipper, 4a, 4b...Movable blade, 4c...
...fixed blade, 5...joining material, 7...horizontal veneer,
8...Export conveyor, 9...Standard length switch, 10
...Standard clipper, 11 ...Adjustment conveyor, 1
2a, 12b...Pinch roller.

Claims (1)

[Claims] 1. Detecting a defective part of a small width veneer veneer that is being transported in a direction perpendicular to the fiber direction, transporting it to a cutting location, stopping the transport, cutting it into a specified width, and then cutting it at the cutting location. The leading end face of the cut succeeding veneer is tightly abutted against the rear end face of the preceding veneer, which is waiting after the conveyance is stopped, and a joining material is attached to the abutting portion to form a blind-like veneer. In a veneer cross-splitting machine configured to restart the conveyance after joining the cross-splitting veneers, the length of the cross-splitting veneers produced and carried out by the veneer cross-splitting machine is carried out. A fixed-length clipper detects and cuts the cut-out material into a fixed length by a fixed-length switch installed on a conveyor, and the process length between the fixed-length clipper and the veneer cross-splitting machine is set to the horizontal-splitting veneer. A fixed-length cutting device for a veneer horizontal stripping machine, comprising an adjustment conveyor that is extendable and retractable according to applied tension, and a pinch roller installed at a predetermined distance l in front of the fixed-length switch. .