JPS6149084B2 - - Google Patents

Description

[Detailed Description of the Invention] (Object of the Invention) The present invention selects only chips from a mixture of cut products and chips flowing in close proximity during the unloading process of a veneer clipper, such as a rotary type veneer clipper. This relates to an automatic air injection type automatic chip separator that is used when separating chips by falling directly below them.
-36201) In the veneer veneer cutting process, an automatic chip separation device such as an automatic separation and sorting device for chips and products separates the total amount of products and chips by a needle-planting conveyor and a mechanical needle removal mechanism. Since the falling separation operation was based on sliding or vertical movement, there were significant restrictions on the material strength of the veneer veneer and the conveyance distance between the boards. punky quality,
In the case of fissile veneer veneers, it is difficult to carry out continuous conveyance and chip separation in a safe manner, and the material of the product may be damaged due to the sticking action of the needle belt, and the delayed response of the needle removal mechanism may cause damage to the product. We have greatly improved the system that had a serious malfunction that forced low-speed conveyance due to dropping and separation, and the continuous conveyance of products and chips is now possible using a suction conveyance method that does not damage the material, and the separation of chips has been improved. The system uses an air injection method that eliminates the delay in response to the return operation due to mechanical parts moving in and out of the conveyor line.
This involves the development of a new type of automatic chip separator.

(Structure of the Invention) As illustrated in an example of its implementation, the apparatus of the present invention is conveyed in a direction perpendicular to the fiber direction by a single plate detector 2 constructed of a limit switch, a photoelectric switch, etc. installed on an incoming conveyor 1. The veneer detector is capable of detecting irregular edges, insufficient thickness, cracks, etc. at the front edge, rear edge, or intermediate portion of the veneer veneer 3 and transmitting a cut-to-length signal. 2 is temporarily stored in synchronization with the conveyance speed of the veneer veneer 3 , and is regenerated when the cut point of the veneer veneer 3 is brought directly under the veneer clipper 4 . Knife actuation mechanism 4 consisting of an electromagnetic clutch brake, etc.
A synchronous storage device 5 is provided to control a. In this case, various types of veneer clippers 4 can be used, but for example, in the case shown, a roller anvil 4b and one or several knives 4c are used.
A rotary type veneer clipper 4 , which is attached to a rotary cylinder 4d, is disposed sandwiching auxiliary conveyors 6a and 6b, and the veneer clipper 4 is rotated by a motor 7 at a constant speed together with a discharge conveyor 8, etc. It is configured as follows. There are also various types of synchronous storage device 5 , such as a magnetic memory and a shift register. For example, in the case of the illustrated magnetic memory, a magnetic drum 5a that rotates in synchronization with the conveyance speed, and a single plate detector 2 are used as the synchronous storage device 5. a writing head 5b for writing a finite cutting signal transmitted from the magnetic drum 5a onto the magnetic drum 5a, and a knife actuating mechanism 4.
a, a first read head 5c for transmitting a stored and reproduced signal for a cutting operation, and a second read head 5d for transmitting a stored and reproduced signal for the cutting position of the veneer veneer 3, which will be described later, to a controlled device. It consists of an erase head 5e for erasing the series of stored signals.

Next, the apparatus of the present invention also cuts the product 3a from the veneer veneer 3 by the veneer clipper 4 .
In order to be able to selectively fall and separate only the chips 3b from among the chips 3b flowing in close proximity to each other, first, porous holes are provided in the open bottoms of the suction containers 9a, 9b, and 9c at the rear stage of the veneer clipper 4 . The belts 10a, 10b, 10c or an air-permeable conveyance member in place of these are suspended and installed in a suction conveyance mechanism that once sucks and conveys the entire amount of the cut products 3a and chips 3b, and the suction cans 9a,
Air injection pipes 11 are hung down to the conveying surface at appropriate locations near both sides of the perforated belts 10a, 10b, 10c suspended in multiple rows on the open bottom surfaces of the belts 9b, 9c, to remove the products 3a and chips 3b during the suction conveyance process. Among them, the device is designed so that only the chips 3b are selectively removed by an instantaneous jet of high-pressure air from the air jet pipe 11, so that the suction and conveyance operation is instantly released, and the chips 3b fall directly below and are separated. In this case, suction power of an appropriate pressure is applied to the suction boxes 9a, 9b, and 9c by an intake pipe 12 communicating with each other and an exhaust device 13 such as a fan or blower connected to the intake pipe 12 to remove the product 3a and chips in the conveying process. 3b. Further, the air injection pipe 11 is installed in a pipe 11a connected to a suitable high-pressure air source, such as a compressor or a high-pressure blower, so that the necessary number of pipes are branched and suspended via on-off valves 14. The air injection pipe 11 is brought directly below by activating the on-off valve 14 in response to the cutting position memory reproduction signal transmitted from the second reading head 5d of the synchronous storage device 5 . The structure is such that the suction and conveyance operation of the chips 3b is instantly canceled by the injection of high-pressure air, and the chips 3b fall and separate directly below.

(Effects of the Invention) As described above, the present invention includes a suction conveyance mechanism that continuously conveys the entire amount of cut products 3a and chips 3b, and an air injection pipe 11 that selectively cancels the suction conveyance operation of the chips 3b. , an on-off valve 1 for the air injection pipe 11
Since this is an automatic chip separation device that is composed of a synchronous memory device that controls 4 in synchronization with the conveyance speed, it is possible to perform the pricking conveyance operation using the conventional needle belt and the falling separation due to the sliding or vertical movement of the mechanical needle extraction mechanism. Its functionality has been greatly improved compared to automatic chip separators that operate, and is particularly effective against material damage to the product 3a due to puncture and splitting veneer veneer 3 sticking, and delayed response of the needle extraction mechanism, i.e., on the conveyor line. This is an automatic chip separator of an instant release type using an air injection pipe 11 that does not involve a response delay for return operation due to the movement of mechanical members in and out of the Continuous transportation of punky quality veneer veneer 3, which is produced from low-grade raw wood that has been brought about due to the depletion of wood resources, and which breaks when punctured, and fissured veneer veneer 3, which falls off from the needle even if punctured. This invention has succeeded in safely and reliably carrying out the chip separation operation under high-speed conveyance without any distance between the motion and the plate, and is an invention with extremely remarkable implementation effects.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the apparatus of the present invention, in which FIG. 1 is a side view and FIG. 2 is a longitudinal sectional front view taken along line A--A in FIG. 1. 3... Plywood veneer, 3a... Product, 3b... Chips, 4 ... Plywood clipper, 5 ... Synchronous storage device, 9a, 9b, 9c... Suction box, 10a, 10
b, 10c... Porous belt, 11... Air injection pipe, 14... Open/close valve.

Claims (1)

[Claims] 1. A suction and conveyance mechanism in which a perforated belt is suspended in multiple rows on the open bottom surface of a suction box located after the veneer clipper, which suctions the veneer veneer cut into products and chips by the veneer clipper from above and continues conveyance. , an air injection pipe with an on-off valve hanging near both sides of a perforated belt suspended in multiple rows on the open bottom of the suction box, and a cutting position of the veneer veneer by the veneer clipper memorized, and the air injection pipe A chip separation device for a veneer clipper, characterized by comprising a synchronous memory device such as a magnetic memory and a shift register, which control the on-off valve in synchronization with the conveying speed.