JPH0225603Y2 - - Google Patents

Description

[Detailed description of the device] This device is a device that removes dead knots and half-dead knots existing in the veneer while conveying the veneer, and removes the dead knots and half-dead knots from the surrounding valid parts to make knot holes. This method facilitates the detection of knot holes by forming knot holes, enables automatic processing of knot parts, and prevents troubles such as these knots falling off during processing of veneers such as horizontal splicing. This is the purpose.

Recently, due to the deterioration of the raw wood situation, plywood is often manufactured using veneers with many dead or half-dead knots, and these knots that exist in the veneer cannot be detected when they are attached to the surrounding active parts. Due to the difficulty, it was not possible to process this automatically, and therefore the veneer with these knots was processed by horizontal splicing or tenderizing without being processed, and these knots were removed during processing. Knots often fall off, resulting in problems such as products that are laterally split being defective or requiring reprocessing, which has become a bottleneck in plywood production.

In this device, dead knots and half-dead knots are removed from the surrounding valid parts in advance to form knot holes, and by forming the knot holes, it can be used as a simple method for detecting defective parts of veneer, such as conventional photoelectric method or thickness detection. This detection enables automatic processing such as cutting and removing knots, filling holes, or patching, and these processes have also succeeded in resolving troubles such as side-splitting or tenderizing. be.

To explain this invention with reference to an embodiment shown in the drawings, a pair of clamp conveyor 1 consists of a plurality of upper endless belts 4 which are stretched over a plurality of upper and rear rotary wheels 2 and 3, respectively. , and a plurality of lower endless belts 7 that are stretched around a plurality of lower front and rear rotating wheels 5 and 6, respectively, so that the veneer A can be held and conveyed in a direction perpendicular to the fiber direction of the veneer A. For example, it is provided with a support body 8 such as a rotating body that presses the back surface of each of the upper endless bands 4, so that the veneer A can be held and conveyed in a curved manner.

The other pair of clamping conveyors 9 are arranged at the rear of the clamping conveyor 1 in the conveying direction, and similarly to the clamping conveyor 1, they are connected to a plurality of upper rotating wheels 10 and 11, respectively. The veneer A is made of fibers by a plurality of upper endless belts 12 that are stretched over each other, and a lower endless belt 15 that is a plurality of lower endless belts that are stretched around a plurality of lower rotating wheels 13 and 14, respectively. In addition to being provided so that it can be held and transported in orthogonal directions,
For example, a support body 16 such as a rotary wheel that presses the back surface of the upper endless band 12 is provided so that the veneer A can be held and conveyed in a curved manner, and each of the upper and lower endless bands 12, 15
The upper and lower endless bands 4 and 7 of the clamping conveyor 1 are shifted in position from each other in a direction perpendicular to the conveying direction. The supports 8 and 16 may be rotary bodies or fixed bar-shaped bodies as in the embodiment, and these rotary bodies or bar-shaped bodies may be divided into endless bands or may be one piece without division. In short, it is sufficient that the upper and lower endless belts can form a running path for holding and conveying the veneer A in a curved shape, and the upper and lower endless belts of each clamping and conveying conveyor may be used as a pair of upper and lower belts, or as a pair of upper and lower belts. It can be implemented in a similar manner even at different positions.

The stabbing rotary body 17 is arranged opposite to the running path for pinching and conveying the veneer A in a curved manner on the clamping and conveying conveyor 1, and has a large number of needle-like needles on its cylindrical surface except for the lower endless band 7. The bodies N are attached radially and rotated in the same direction at the same circumferential speed as the feeding speed of the clamp conveyor 1, so that almost the entire surface of the veneer A passing through it, except for the part of the endless band 7, is acicularly shaped. It is provided so that it can be attached to the body N.

The dead knots 18 or half-dead knots 19 present in the veneer A have no or only partial fiber communication with the surrounding effective parts,
When the veneer A is held and conveyed in a curved manner by the holding conveyor 1 and bending force is applied, these dead joints 1
8 or the half-dead knot 19 is in a state where it can be peeled off or easily peeled off from the effective part, and when the needle-like body N of the stabbing rotating body 17 is stuck in this state, the dead knot 18 or the half-dead knot 19 becomes easily effective. Separate from the section and knot hole 20
is formed. On the other hand, since the fiber connection is strong in the effective part and the raw knot part, even if the needle-like object N sticks thereto, it will not be affected in any way by the clamping conveyor 1.
Transported normally by. And stabbing rotating body 1
Since the needle-like body N of 7 is attached so that it can stick almost the entire surface of the veneer A through which it passes, except for the part of the endless band 7 below, the dead node 18 or the half-dead node 19 is the part of the endless band 7. This means that it can be reliably removed no matter where it is present except for. Note that the detachment body 21 provided at the part of the stabbing rotary body 17 releases the dead knot 18 or half-dead knot 19 stuck to the needle-like body N from the needle-like body N's sticking.

As mentioned above, by holding and conveying the veneer A in a curved manner, the dead knots 18 or half-dead knots 19 are in a state where they can be peeled off or easily peeled off from the surrounding effective parts, so that the sticking type of sticking In place of the rotating body 17, a scraping or scraping-type scraping rotating body 22 is used,
Similarly, the knot holes 20 can be formed by separating and removing these knots from the effective portion. In the embodiment, the scraping rotary body 22 is disposed opposite to the running path of the clamping and conveying conveyor 9 that clamps and conveys the veneer A in a curved manner, and has a cylindrical surface with the exception of the lower endless band 15. A large number of flexible bodies 23 made of a suitable material are attached so as to be able to come into contact with almost the entire surface of the veneer A passing through, and by their rotational contact, dead particles existing in the veneer A excluding the endless band 15 are removed. The knot holes 20 are formed by scraping off or brushing off the knots 18 or half-dead knots 19. In this case, the upper and lower endless bands 12 and 15 of the clamping conveyor 9 are connected to the clamping conveyor 1.
Since the positions of the upper and lower endless bands 4 and 7 are shifted, the dead knots 18 or half-dead knots 19 that were not removed by the stabbing rotary body 17 on the clamp conveyor 1 are removed by the scraping rotary body 22. All these knots present in the veneer A are removed and the knot holes 20 are formed. In addition, in the case of using the scraping rotary body 22, since the flexible body 23 is in contact with the surface of the veneer, the circumferential speed and rotation direction thereof should be selected and set appropriately, and the clamping conveyor and the pricking rotary body or the scraping body should be selected and set appropriately. The number of sets of rotating bodies is as appropriate as required. In the diagram, loading conveyor 2
Reference numeral 4 is for feeding the veneer A to the clamping conveyor 1 in a direction perpendicular to its fibers, and the carrying-out conveyor 25 is for receiving the veneer A sent out from the clamping conveyor 9 and feeding it to the next process. It is.

As described above, this invention uses a sandwiching conveyor that pinches and conveys the fibers in a curved manner in a direction perpendicular to the fibers using multiple upper and lower endless strips, by shifting the positions of the endless strips from each other in the conveying direction. Two or more sets are arranged in the front and rear, and a pricking rotary body or a scraping rotary body is provided opposite to the curved running path of each clamping conveyor. The existing dead knots or half-dead knots are likely to peel or peel off from the effective part, and all these knots present in the veneer can be easily separated and removed by the stabbing rotary body or the scraping rotary body. It is capable of forming knot holes, and by forming knot holes, it is possible to automate knot detection, cutting and removal, hole filling, patching, etc., and also eliminates troubles in processes such as side splicing or tenderizing. This will make a great contribution to the plywood industry.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a side view and FIG. 2 being a plan view of FIG. 1. 1, 9...Pinch conveyor, 4, 12...Upper endless band, 7,15...Lower endless band, 8,1
6...Support body, 17...Punching rotating body, 18...Dead knot, 19...Half dead knot, 20...Knot hole, scraping rotating body, 23...Flexible body, A...Single plate, N... ...acicular body.

Claims (1)

[Scope of utility model registration request] At least two sets of clamping conveyors that clamp and convey the veneer in a curved manner in a direction perpendicular to the fiber direction of the veneer using a plurality of upper and lower endless bands are arranged so that the positions of the endless bands are adjusted in the forward and backward directions of the conveyance direction. A pricking rotary body or a single pricking body that can be pricked on almost the entire surface of the veneer excluding the endless band portion is arranged so as to be shifted in a direction perpendicular to A device for removing dead knots and half-dead knots, which is equipped with a scraping rotating body that can come into contact with almost the entire surface of a board.