JPH0785872B2 - Veneer cutting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cutting device that removes defective portions of irregular-sized veneers or performs regular-size cutting in a plywood manufacturing process, and particularly thin veneers. The purpose is to provide a cutting device capable of cutting.

(Prior Art) A conventional shearing type cutting device is configured to cut a leading edge and a trailing edge of a random-sized veneer by a single cutting device including a fixed blade and a movable blade.

Further, Japanese Patent Publication No. 54-11958 discloses a cutting device for cutting the front edge or the standard length of a veneer and a cutting device for the rear edge of the veneer or the standard length. 2 sets of cutting devices are arranged side by side horizontally with respect to the conveying direction of the veneer, and two sets of movable devices such as slides or tipples are arranged between the two cutting devices. A veneer clipper configured to form a single-plate transport path is disclosed.

(Problems to be solved) In the case of the conventional single cutting device as described above, the effective part of the veneer is on the blade of the cutting device when cutting the leading edge, and the cutting accuracy is high. Is high, and the cut scrap veneer drops and is discharged downward to ensure separation of the scrap, but as shown in FIG. The effective part of A is located on the gap between the carry-out conveyor 11 and the receiving blade 10 because of the space required for the vertical movement of the blade 9 and the discharge of the scrap veneer. It is difficult to cut the trailing edge, and the cutting edge 10 described above together with the problem that the cut scrap veneer of the trailing edge remains on the receiving edge 10.
There is also a problem that the feeding force is not applied to the veneer A in the gap between the unloading conveyor 11 and the unloading conveyor 11.

In Japanese Patent Publication No. 54-11958, some of the problems mentioned above are solved, but two sets of cutting devices are arranged side by side horizontally in the conveying direction. Since the single plate transport path is formed by the movable device between the two sets of cutting devices, the single plate is transported by three types of transport devices including the carry-in conveyor, the movable device and the carry-out conveyor. For this reason, the synchronization of the start-up time and stop time of the intermittent drive between each transfer device is complicated, and there is a margin in the operation delay time due to the individual operation start and stop times in order to make the synchronization between each transfer device accurate. It is indispensable and there is a problem in that it is not possible to cope with speedup as a whole. Further, as in the conventional device described above, there are two parts where the feeding force to the veneer is not given due to the gaps required between the cutting device and the movable device at the front position and between the movable device and the cutting device at the rear position. There are also some places, and in particular, there is a problem in that a narrow single plate is bent without being conveyed in parallel. At the same time, the gap between the general feeding devices is located in the middle of the veneer. When cutting and removing a large opening such as a crack, the veneer is transferred to the movable device because the trailing edge of this crack is cut first. There is also the problem that it will not be transferred reliably when it is opened. Further, there is a problem that the scrap veneer is discharged from two places by two sets of cutting devices.

(Means for Solving the Problems) In order to solve the above problems, the present invention oscillates a single-plate transport path by a swingable oscillating conveyor in a downward direction and in a substantially horizontal direction to convey the sheet. A first cutting device for cutting the leading edge of the veneer is installed following the position of the downward end of the downward direction of the path, and the veneer is brought close to the position where the conveying path of the swing conveyor reaches in the substantially horizontal direction, A second cutting device for cutting the trailing edge and the regular length is installed so as to have a cutting edge line parallel to the cutting edge line of the first cutting device, and the single plate pressing device is provided for each of the first and second cutting devices. It is intended to solve the above-mentioned problems by a configuration in which is attached.

(Operation) The irregular-sized veneer carried in by the carry-in conveyor is carried by the swinging conveyor in which the carrying path is swinging downward until the cutting position of the front edge of the veneer reaches the first cutting device. After that, the conveyance is temporarily stopped to cut the front edge of the veneer, and at this time, the first veneer pressing device presses the effective part of the veneer on the receiving blade of the first cutting device at the front position. Enables highly accurate cutting. The scrap veneer at the front edge of the cut veneer drops and is discharged downward. After cutting, the swing conveyor swings upward,
After the transport path reaches a substantially horizontal direction, the veneer is conveyed by the carry-in conveyor, the swing conveyor, and the carry-out conveyor that carries the same in synchronization with these until the cutting position of the trailing edge of the veneer reaches the second cutting device. To pause. During this time, the first veneer pressing device retracts to the rear position. Further, the second veneer pressing device swings downward to press the effective portion of the veneer on the receiving blade of the second cutting device, thereby enabling highly accurate cutting by the second cutting device. . After the cutting is completed, the second veneer pressing device swings upward to release the pressing of the veneer, and the veneer is carried out by the carry-out conveyor. The oscillating conveyor oscillates downward to the end of the descent to prepare for the loading of the next veneer.

(Embodiment) The present invention will be described with reference to an embodiment shown in the drawings. In the carry-in conveyor 1, a plurality of endless belts are stretched on a rotating wheel, and intermittently driven to make a single plate A of random scale almost the same as its fibers. It conveys in the direction of a right angle. Following this, a plurality of endless belts are vertically attached to the rotating car, and are intermittently driven in synchronization with the carry-in conveyor 1, and a reciprocating device (not shown) such as a fluid pressure cylinder using the shaft P of the rotating car as a fulcrum. Thus, the swing conveyor 2 that swings the transport path of the veneer A in the downward direction and substantially in the horizontal direction is installed. A reciprocating device (not shown) that reciprocates the blade 3a in a direction substantially perpendicular to the direction of the conveying path at the end, after the position where the conveying path of the oscillating conveyor 2 is oscillated downward and becomes the lower end. ), A blade 3a and a fixed receiving blade 3b,
A first cutting device 3 for cutting the front edge of the veneer A is installed. Further, when the front edge of the veneer A is cut by the first cutting device 3, the effective portion of the veneer A is pressed at the front position to cut the rear edge of the veneer A or the standard length. A first veneer pressing device 4 which is reciprocated to a rear position on the carrying-in side and includes a reciprocating motion device 4a such as a fluid pressure cylinder and an elastic body 4b such as a spring plate.
Set up.

The transport path of the swing conveyor 2 swings upward and approaches the position where it has reached a substantially horizontal direction, the blade edge line is parallel to the blade edge line of the first cutting device 3, and is substantially in the transport direction of the veneer A. Reciprocating actuator (not shown) that reciprocates the blade 5a in the right angle direction, blade
A second cutting device 5 which is composed of a fixed blade 5a and a fixed blade 5b and cuts a trailing edge of the veneer A or a fixed length is installed. This second
When cutting the trailing edge of the veneer A or the standard length, the cutting device 5 is swung downward around the fulcrum Q to press the effective portion of the veneer A, and when the veneer A is conveyed, A second single plate pressing device 6 composed of a reciprocating device 6a such as a fluid pressure cylinder that releases the pressing force and swings upward and an elastic body 6b such as a spring plate.
Set up.

Furthermore, following the second cutting device 5, a plurality of endless belts are stretched up and down on a rotating car, and intermittently driven in synchronization with the carry-in conveyor 1 and the swing conveyor 2 to carry out the veneer A.
Set up.

The detector 8 arranged at the position of the carry-in conveyor 1 is composed of a photoelectric tube, a limit switch, etc., detects the cutting position of the veneer A, and transmits the cutting signal to each operating device via a delay circuit or the like. is there.

As described above, in the embodiment, the second cutting device is installed close to the position where the single plate conveying path by the swinging conveyor is substantially horizontal. It is also possible to install the transport path of the rocking conveyor at an appropriate position from a substantially horizontal direction to an upward direction. In this case, the tip end of the swing conveyor swinging about the axis P of the rotating wheel as a fulcrum approaches a proper position on the locus drawn,
It is necessary to install the blade of the second cutting device so that the blade of the second cutting device moves up and down in a direction substantially perpendicular to the direction of the transport path of the swing conveyor.

Further, in order to further accelerate the discharge of waste veneer when cutting the front edge and the rear edge of the veneer, a blowing device for blowing air or the like from above at the same time as the cutting is provided in the first and second cutting devices. It is also possible to attach it above.

Further, when the cutting device of the present invention is applied as a size cutting device of a single-plate horizontal stripping machine, the conveying path of the swinging conveyor is swung in the upward direction, and a known adhesive coating device is provided at the rising end position. After applying adhesive to the front end surface of the veneer, rock the transport path to a substantially horizontal direction to start transporting the veneer and abut the rear end face of the preceding veneer to form a horizontal strip veneer. It is also possible to do so.

The procedure for cutting the veneer A and discharging the waste veneer according to the embodiment of the present invention will be described with reference to FIGS. 2 to 4. In FIG. 2, the veneer is conveyed by the carry-in conveyor 1 and the swing conveyor 2 swinging downward until the cutting position of the leading edge reaches the first cutting device 3, and is temporarily stopped. At this time, the elastic body 4b of the first veneer pressing device 4 is at the front position, and the veneer A
By pressing the effective portion of the cutting blade 3b with the receiving blade 3b, it is possible to perform highly accurate cutting when performing cutting by the first cutting device 3, and the cut waste veneer is surely dropped and discharged downward. .

In FIG. 3, the single plate A whose front edge has been cut is sandwiched by the transport path, and the swing conveyor 2 swings upward to reach a substantially horizontal direction and stops swinging to transport the single plate A. After the start, the sheet is conveyed until the cutting position of the trailing edge of the veneer A reaches the second cutting device 5 by the synchronized carry-out conveyor 7, and is temporarily stopped. The front edge of the veneer A cut by the first cutting device 3 approaches the second cutting device 5 when the swing conveyor 2 swings and the transport path reaches a substantially horizontal direction. The elasticity 4b of the single veneer pressing device 4 does not interfere with the operation of the blade 5a of the second cutting device 5, so that the movement of the veneer 4a is stopped by the operation of the reciprocating motion device 4a until the veneer conveyance is temporarily stopped. Retreat to position.

In FIG. 4, the second veneer pressing device 6 swings downward at the same time when the conveyance of the veneer A is temporarily stopped and presses the effective portion of the veneer A on the receiving blade 5b. After the trailing edge of the veneer A is cut, the elastic body 6b of the second single-cutting plate supporting device 6 swings upward, and the veneer A is carried out to the next process by the carry-out conveyor 7 and is scraped. The veneer is surely dropped and discharged downward. Further, the swing conveyor 2 swings downward to prepare for the loading of the next single plate.

The above description is for cutting only the leading edge or the trailing edge of the veneer, but in the case of cutting a fixed length, when the cutting position of the fixed length reaches the second cutting device 5. The conveyance is temporarily stopped and the second cutting device 5 cuts. Also, single plate A
If there are defects such as cracks, holes, and knots that are open in the middle of, and it is necessary to cut and remove them, the front edge of the veneer A is cut as usual, When the leading edge of the part (the trailing edge of the effective portion) reaches the second cutting device 5, the conveyance of the veneer A is temporarily stopped, the leading edge (the trailing edge of the active ingredient) is cut, and then shaken. After oscillating the moving conveyor 2 in the downward direction, the moving conveyor 2 is conveyed until the trailing edge of the defect portion (leading edge of the effective portion) reaches the first cutting device 3, and is temporarily stopped for cutting. Subsequent operations are processed in the same way as for the normal leading and trailing edge cuts. Therefore, even in a veneer having a defective portion in the middle of the veneer A, the defective portion can be surely cut and removed, and the scrap veneer can be discharged.

(Effect) As described above, the present invention includes a first cutting device installed subsequent to a downward end of a downward direction of a swinging conveyor that swings a single plate transport path in a substantially horizontal direction with a downward direction, and a transport path. The second cutting device is installed in the vicinity of the substantially horizontal position of, and the carry-out conveyer is installed next to the second cutting device, and the active ingredient of the veneer is cut into each of the first and second cutting devices at the time of cutting. This is a configuration in which first and second single-plate pressing devices for pressing are arranged.

According to the present invention, when the front and rear edges of a veneer or a regular length is cut, the effective part of the veneer is pressed by the veneer pressing device on the receiving blade, so that even a thin veneer with a weak stiffness can be cut with high accuracy. Moreover, the position of the two cutting devices is set close to the position of the lower end of the downward direction of the conveying path in the horizontal direction by the installation of the swing conveyor. The leading edge of the veneer, whose front edge has been cut due to the configuration shifted in the direction, reaches very close to the second cutting device when the transport path is swung to a substantially horizontal position, and two sets of cutting are performed. There is no need to form a single-plate transport path between the devices, and there is ample room for the operation of each blade, and it is possible to reliably drop and discharge the cut waste veneer. There is a gap between the two, which is the part where the feeding force cannot be applied when the veneer is conveyed. Tondo without possible without reliably conveyed even flex it a small width veneer, a position that is further discharge of waste veneer there is also an advantage to be one place.

As described above, according to the present invention, the single plate pressing device cuts a single plate, particularly a thin single plate with high precision and does not require the formation of a conveying path between two sets of cutting devices. This makes it possible to reliably convey and cut even a veneer having a large open crack or the like, which greatly contributes to the plywood industry.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, in which FIG. 1 is a side view and FIG.
FIG. 4 to FIG. 4 are schematic diagrams showing the operating state, and FIG. 5 is an explanatory diagram showing the cutting state according to the conventional device and the embodiment. 1 ... carry-in conveyor, 2 ... swing conveyor, 3 ... first cutting device, 4 ... first veneer pressing device, 5 ... second cutting device, 6 ... second veneer Presser device, 7 ... Carry-out conveyor, A ... Single plate

Claims (1)

[Claims] 1. An intermittently driven carry-in conveyor that conveys a random-sized veneer in a direction substantially perpendicular to the fibers, and is installed subsequent to the carry-in conveyor and is driven in synchronization with the intermittent drive of the carry-in conveyor. A transport path for transporting the veneer, an oscillating conveyor that can oscillate in a direction substantially parallel to the downward direction, and the infeed conveyor and the oscillating conveyor to temporarily stop the vehicular transportation of the veneer, and thus the oscillating conveyor. The first cutting device, which is installed following the position where the transport path is oscillated in the downward direction and becomes the trailing end of the descent, and which cuts the front edge of the veneer, and the transport path of the swing conveyor are substantially horizontal. A second cutting device which is installed close to a position where it is swung, has a cutting edge line parallel to the cutting edge line of the first cutting device, and cuts a trailing edge or a fixed length of the veneer; The cut effective veneer is installed in front of the second cutting device. It is composed of a carry-out conveyor that intermittently drives in synchronization with the swing conveyor and carries out, and a veneer pressing device that is attached to the first and second cutting devices and presses an effective part of the veneer at the time of cutting. A single plate cutting device characterized in that