JPS6321361Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a four-periphery sawing device for simultaneously sawing two sheets of plate-like material such as plywood, particle board, and gypsum board to produce a fixed-sized product.

As a conventional four-periphery sawing device for plate-shaped objects, particularly plywood, devices as shown in FIGS. 1, 2, and 3 have been used. First, when the plywood material 1 is inserted into the insertion inclined roller conveyor 2 having a certain angle, it is moved by the guide plate 3 provided on one side, and then slides on the guide plate 3 and is transferred to the circular saw of the next stage. The material is delivered to a vertical cutting machine 5 having a vertical cutter 4, and the edges in the vertical direction are sawed off. Next, this plywood material 1 is taken out to a vertical cut-out conveyor 6, inserted into an automatic direction change device 7, and impinged on a stopper 8 provided at the front end thereof, and at a position adjacent to the stopper 8. Upon detection by a detection device (not shown), a chain conveyor 10 equipped with a claw member 9 is activated and conveyed in a perpendicular direction. Next, this plywood material 1
is inserted into a transverse machine 12 having a circular saw 11, and its lateral edges are sawed off to form a sized product. Note that 13 is a plate holding member, which is a thin plate spring 1 attached to a belt piece 14 as shown in FIG.
5 are stacked on top of each other and fixed to the upper part of the chain conveyor 10, and through its elasticity, the plywood material 1 is prevented from lifting up and blisters that are likely to occur on the way to the crosscutting machine 12. be. Further, 16 and 17 are rolls for conveying the plywood material 1 and for preventing the plywood material 1 from being displaced or torn during sawing.

Generally, in a plywood factory, the sizing sawing process and the hot pressing process using a hot press are directly connected, and the cycles between the two processes are synchronized.

However, in recent years, in plywood factories, the productivity of the hot pressing process has improved due to the increased speed and height of hot presses, as well as improvements in adhesives. In this case, the cycles between the two processes become unbalanced, and this has been dealt with by increasing the sawing speed in the sizing sawing process. Furthermore, in today's world where plywood is produced in various sizes due to diversification of demand, the above-mentioned tendency becomes even more pronounced especially when manufacturing extra-large products with wide widths and lengths.

However, since the conventional device cuts the plywood material 1 one by one at intervals, it is inefficient and, as the speed increases as mentioned above, the plywood material 1 is subjected to increased shocks and rips during transportation. This causes inconvenience.

Also, when cutting at high speeds as mentioned above,
The cutting depth S per thread of a circular saw is given by the rotation speed of the circular saw as N, the number of threads on the saw blade as Z, and the conveyance speed as V.
Since S=V/NZ, when the conveyance speed V is increased as described above, the cutting depth S per circular saw also increases, so that the so-called This also causes fuzzing or the formation of whiskers on the lower ridge of the rear end, leading to a decline in quality.

The present invention has been devised in view of these problems, and one embodiment thereof will be described with reference to the accompanying drawings. Note that parts common to the conventional device are designated by the same reference numerals, and description thereof will be omitted.

First, the vertical cutting and insertion inclined conveyor 20 is provided with a lower inclined roller conveyor 21 as shown in FIG. A plurality of pulleys 22a and 22b are pivoted back and forth above this, and a plurality of downwardly inclined arm frames 23 are swingably provided inside, and a board roll 24 is attached to the tip of the arm frame 23 so as to be freely driven. In addition, a plurality of rows of endless belts 25 are circumscribed around the pulleys 22a, 22b and the board roll 24, and the endless belts 25 are driven at the same speed as the lower inclined roller conveyor 21. The device 26 is suspended above the lower inclined roller conveyor 21. In this case, the upper board shifting device 26 uses its own weight to press the overlapping plywood materials 1a and 1b, but it would be better if it was configured to apply some pressure using a spring or the like. , also spring 2
It may be replaced with a system as shown in FIG. 7, in which the shifting roll 24a is elastically supported in the vertical direction by interposing the roller 24a. Further, the endless belt 25 is discontinued and a board roll (not shown) is placed on each roller of the lower inclined roller conveyor 21, which is driven at the same circumferential speed as the lower inclined roller conveyor 21.
It may also be a vertically suspended structure. In short, this type of upper board shifting device uses the lower inclined roller conveyor 21.
Any conveying means configured to press the upper plywood materials 1a, 1b and drive in the inclined direction at the same circumferential speed as the inclined roller conveyor 21 is sufficient.
Reference numeral 28 denotes a guide plate that is provided separately on one side, and between the guide plates, a guide roller device 29 that rotates at the same circumferential speed as the lower inclined roller conveyor 21 in the conveying direction is provided so as to be able to move forward and backward. It is being

A vertical cutting machine 5 is directly connected to this vertical cutting insertion inclined conveyor 20, and a vertical cutting taking out conveyor 40 is connected to the vertical cutting machine 5. This vertical cut-out conveyor 40 has a pair of upper and lower endless bands 41 and 42 arranged side by side that rotate at the same conveyance speed, as shown in FIG. Note that instead of this endless belt system, a number of rollers (not shown in the drawings) rotated at the same circumferential speed may be arranged vertically opposite each other, and the plywood material 1a,
It is sufficient if the structure is such that 1b is held and conveyed.

A roller conveyor 50 is connected to the vertical cutting conveyor 40, and a stopper 8 is provided at the front end of the roller conveyor 50.
A touch roll device 52 as shown in FIG. It is pivotably attached to the top via a fluid cylinder (not shown) or a cam mechanism (not shown) so as to be able to come in and out. A plurality of chain conveyors 10 each having claw members 9 for pushing the plywood materials 1a, 1b in a direction perpendicular to the roller conveyor 50 are arranged, and a detection device (not shown in the drawings) is installed near the stopper 8. let Further, the chain conveyor 10
A swing shaft 53 is pivotally supported above the transport direction perpendicular to the transport direction, and several sets of brake devices 54 as shown in FIGS. 10 and 11 are disposed on the swing shaft 53. The brake device 54 is configured such that a worm wheel (not shown) is first fitted onto the swing shaft 53, and then a worm is engaged with the worm wheel (not shown) to swing. axis 53
A suspension frame 55 is fixed to the suspension frame 55, and the base ends of swing arms 56a and 56b are pivotally attached to the lower part of the suspension frame 55, and one of the brake axles 57 is attached to the tip of one of the swing arms 56a. Key plate 58 on the side
furthermore, the brake axle 5
A swinging arm 5 whose other side of 7 faces the swinging arm 56a.
It is inserted into the adjustment screw 59 screwed onto the tip of 6b. Next, a rubber-wrapped brake wheel 60 is loosely fitted onto this brake axle 57, and a brake pad 61 such as an asbestos plate is fixed to the boss end surface A of the brake wheel 60 on the key plate 58 side. A brake disc 62 is screwed onto the inside of the tip of the swinging arm 56a. A thrust bearing 64 is fitted between the boss end face B of the brake wheel 60 and a bearing receiver 63 fitted close to the boss end face B, and the adjusting screw 59 is inserted.
A spring 66 is interposed between a spring seat 65 engaged with a stepped portion provided at the tip of the spring and the bearing 63, and 67 is a lock nut, and 68 is a bolt for lowering the swinging arms 56a and 56b. It is a stop. Further, in front of the brake device 54, a plurality of plate holding members 13 are arranged. The roller conveyor 50 that has been explained so far,
Tatsuchiroll device 52, detection device (drawing omitted),
The chain conveyor 10, the brake device 54, and the plate holding member 13 constitute an automatic direction change insertion device 69.

Further, the automatic direction changing/inserting device 69 is provided with a transverse machine 1.
It is a combination of two.

Next, the effect will be explained. First, two pieces of plywood material 1
Vertical cut insertion inclined conveyor 2 with a and 1b overlapped
0, these plywood materials 1a and 1b are transferred to the lower inclined roller conveyor 21 and the upper board shifting device 26.
While being held there, it is moved to the inclined side and comes into contact with the guide plate 28, and is conveyed along the guide plate 28. In this case, while the plywood materials 1a and 1b are being moved together, the end surface of the lower plywood material 1b is closer to the guide plate 2 than the end surface of the upper plywood material 1a.
If it is assumed that the plywood materials 1a and 1b, which are conveyed in a pinched state, are shifted toward the guide plate 28, the lower plywood materials 1b first come into contact with the guide plate 28. Next, since the upper surface of the upper plywood material 1a is driven by the upper board shifting device 26, the lower plywood material 1b
After sliding on the top, it comes into contact with the guide plate 28 and is matched with the end surface of the lower plywood material 1b. On the other hand, if the upper and lower plywood materials 1a and 1b shift in the opposite state to the above,
In other words, the upper plywood material 1 is
The guide plate 2 is smaller than the plywood material 1b with the lower end surface of
8, first the upper plywood material 1a contacts the guide plate 28, and then the lower plywood material 1b also has its lower surface driven by the lower inclined roller conveyor 21, so that the upper plywood material 1a contacts the guide plate 28. The upper plywood material 1a slips between the upper plywood material 1a, and is brought into contact with the guide plate 28 and aligned with the end surface of the upper plywood material 1a. On the other hand, the 12th
In the case shown in the figure, the force of the arrow E in the conveying direction inclined on the plywood materials 1a, 1b acts, and the arrow C with the even corner portions 1A, 1B at one end of the plywood materials 1a, 1b as the base point acts on the plywood materials 1a, 1b. Then, due to the action of the moment of rotation in the direction D, the end faces of both are brought into contact with the guide plate 28 and brought into alignment. Next, the plywood materials 1a and 1b are conveyed along the guide plate 28, and the vertical cutting machine 5 in the next stage cuts the two pieces at the same time at the edges at both ends in the vertical direction. In addition, the front part of the plywood materials 1a, 1b may be released from the drive of the upper board shifting device 26 just before being delivered to the vertical cutting machine 5.
Since misalignment is likely to occur again, please replace the guide roller device 29 at an appropriate time.
may be advanced slightly inward from the guide plate 28 to drive the end surfaces of the plywood materials 1a, 1b.

The vertically cut plywood materials 1a and 1b are inserted into the roller conveyor 50 of the next automatic direction change insertion device 69 while being held between the endless bands 41 and 42, and then hit the stopper 8 at the front end thereof. However, in this case, the plate thickness is generally 2.7mm and
So-called standard size plywood materials 1a, 1b such as 3.2mm
is highly elastic and is also conveyed at high speed, and its reaction force causes it to separate from the stopper 8, causing the end faces of the two to shift. However, at this time, the shifted plywood materials 1a and 1b are driven in the direction of the stopper 8 by the touch roll device 52 on the upper surface and the roller conveyor 50 on the lower surface, so it is the same as in the case of the vertical cutting insertion inclined conveyor 20. Through this process, both end faces are matched. On the other hand, the plywood material 1 impinged on the stopper 8
When the front ends of the wheels a and 1b are detected by a detection device (not shown), the Tatsuchiroll device 52 operates a fluid cylinder (not shown) to swing slightly upward, and the rubber-wrapped wheels are rotated. 51 is separated from the upper surface of the plywood materials 1a, 1b, and the pressing and driving force against the upper surfaces of the plywood materials 1a, 1b are released. At the same time, the chain conveyor 10 is activated, and the pawl member 9 moves the plywood materials 1.
The rear end surfaces of a and 1b are pushed and conveyed in the perpendicular direction. In this case as well, the plywood materials 1a and 1b positioned at the stopper 8 have claw members 9 on their rear end surfaces.
Sometimes they collide at high speed, and the impact pushes them out, causing a shift in their end surfaces.
Next, the procedure for correcting the displacement of the end surfaces caused by the claw members 9 abutting against the rear end surfaces of the plywood materials 1a, 1b at high speed will be specifically explained.

First, the upper plywood material 1a is the lower plywood material 1.
If it shifts forward from plywood material 1b, the lower plywood material 1b maintains the misalignment of the end face with plywood material 1a.
When the rear end of the plywood material 1a is pushed by the claw member 9 and reaches the brake device 54, the upper plywood material 1a is almost stopped at the current position due to the pressure braking operation of the brake wheel 60 from above. On the other hand, since the claw member 9 continues to move forward, the deviation between the end faces of the two is corrected.

Conversely, if the lower plywood material 1b is shifted forward than the upper plywood material 1a, the lower plywood material 1b is disposed at a position slightly higher than the upper track surface of the chain conveyor 10. roller conveyor 50
The upper plywood material 1a is placed on the individual rolls 50a constituting the upper plywood material 1a by the claw members 9.
When the plywood material 1b is pushed forward, the upper part of the lower plywood material 1b which tries to stay on the roll 50a due to inertia comes into sliding contact with the lower part of the upper plywood material 1a, and the claw member 9 continues to move forward, so that both The deviation of the end face will be corrected. In addition, if the end surfaces of the two are shifted in a cross-like manner, the brake device 5
4, a moment acts to rotate the plywood materials 1a, 1b from the position of the claw member 9 that abuts one side of each rear end surface, so that the end surfaces of the two are aligned. Then, the plywood materials 1a and 1b with their end faces aligned are pressed and braked by the brake device 54 and the plate holding member 13, so that the plywood materials 1a and 1b are transported until they are transferred to the next-stage transverse machine 12. This prevents slippage and breakage.

Next, the plywood materials 1a and 1b are inserted into a crosscutting machine 12, and both lateral end edges are simultaneously sawed off to produce a sized product.

In this embodiment, the plate-shaped body according to the device of the present invention is made of plywood for convenience of explanation, but it is not limited to this. In addition, the device of the present invention does not only cut two sheets at the same time, but when sawing only one sheet, the tatsuchi roll device of the automatic direction change insertion device and the brake device are slightly swung upward to cut the top surface of the plate-like object. If they are temporarily fixed in a more distant state, the upper surface of the plate-like body will be freed from the operation of these devices, and it will also be possible to saw the plate-like body one by one to a fixed size. It is possible to respond to a wide range of production needs, such as eliminating imbalances between processes.

As is clear from the above detailed description, according to the device of the present invention, the operator simply stacks two plate-shaped bodies appropriately and inserts them into the vertical cut-insertion inclined conveyor. This device automatically corrects the misalignment and is capable of so-called overlapping cutting in which two plates can be sawed to a fixed size at the same time, resulting in a significant improvement in productivity. Therefore, in plywood factories, one sizing sawing device is usually paired with one or two hot presses, but with the device of the present invention, even if one high-stage hot press is added, The cycle between the two processes can be sufficiently synchronized, which is really useful. Furthermore, as an additional effect, the device of the present invention is generally operated at a somewhat lower sawing speed than conventional devices, and particularly when sawing plywood material, the cutting speed of the sawed end surface of the device is lower. It also contributes to suppressing the so-called fuzz and whiskers that are likely to occur, and also contributes to improving the quality of the product.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view of a conventional device, and Figure 2 is a schematic plan view of a conventional device.
A side view seen from direction F in the figure, Figure 3 is G in Figure 1.
4 is a side view of the plate holding member, FIG. 5 is a schematic plan view of the device of the present invention, FIG. 6 is a schematic side view of the vertical cutting and insertion inclined conveyor as seen from the H direction, and FIG. 7 is a side view of the plate holding member. is an explanatory diagram in which main parts are enlarged of another embodiment of the upper board gathering device in the vertical cutting insertion inclined conveyor, FIG. 8 is a schematic side view of the vertical cutting and taking out conveyor, and FIG. FIG. 10 is a front view of the brake device, FIG. 11 is a side view thereof, and FIG. 12 is a schematic plan view illustrating the operation of the vertical cutting/insertion inclined conveyor. 1a... Upper plywood material, 1b... Lower plywood material, 5... Vertical cutting machine, 8... Stopper, 10...
Chain conveyor, 12...Transverse machine, 13...Plate holding member, 20...Vertical cutting insertion inclined conveyor, 26
. . . Upper board gathering device, 40 . . . Vertical cutting and take-out conveyor, 52 .

Claims (1)

[Claims for Utility Model Registration] 1. On a lower inclined roller conveyor that is rotatably arranged in parallel at a certain angle in the conveying direction of the plate-like object,
A vertical cut-insertion inclined conveyor comprising a hanging upper board shifting device which presses a plate-shaped body and drives the plate-shaped body at the same speed in the direction of inclination, and a guide plate is attached to one side of the lower inclined roller conveyor; A vertical cutter for sawing edges at both longitudinal ends of a plate-shaped body, a vertical cutting conveyor consisting of a pair of upper and lower conveying devices connected to the vertical cutting machine, and a stopper at the front end of the vertical cutting conveyor. A detection device is provided near the stopper, and a tatsuchi roll device that rotates at the same speed as the conveyance speed or slightly faster is mounted on the roller conveyor. A plurality of chain conveyors each having a pawl member for pushing the plate-shaped body in a perpendicular direction are disposed, and a brake device is provided above the chain conveyor to press and brake the upper surface of the plate-shaped body so as to be able to move toward and away from the top surface of the plate-shaped body. An automatic direction-changing insertion device comprising a plurality of sets attached via a swing shaft and a plurality of plate holding members attached in front of the device, and a horizontal plate body connected to the automatic direction-changing insertion device. 1. A device for sawing a plate-shaped body around four circumferences, comprising a transverse machine that cuts edges at both ends in a direction. 2. The upper board shifting device is configured by circumscribing the board shifting roll on an endless belt suspended between a plurality of pulleys, and
A device for sawing a plate-like material around four circumferences according to claim 1, which is driven at the same speed as the lower inclined roll. 3. The board according to claim 1 of the utility model registration, in which the upper board shifting device elastically supports the board shifting roll in the vertical direction with a spring interposed, and is driven at the same speed as the lower inclined roll. A device for cutting all four circumferences of a shaped body.