JPH02143801A - Apparatus for cutting veneer board - Google Patents

Abstract

PURPOSE:To make surely a preceding veneer board and following veneer board separable from each other, and also make the blade tip of a cutting blade and the outermost peripheral surface of a stick transport material not brought into contact with each other by cutting a veneer board without stopping the transport of it through the interaction between the stick transport action of the stick transport material and the guide action of a veneer board guide member. CONSTITUTION:When a veneer board detector 7 which has detected the passage of unnecessary part 9a in the front end of a veneer board 9 transmits the cutting signal for the front end, and at the time when the unnecessary part 9a reaches the blade tip of a cutting blade 3 in response to the control of a control mechanism 8, an oscillating mechanism 6 may act to oscillate veneer board guide members 4, 5 to a predetermined position. For this reason, the veneer board 9 is cut obliquely, and an effective part thereof is guided to the side existing a delivery conveyor 20, and besides, the unnecessary part 9 is removed downward in the delivery conveyor 20. Next, when the veneer board detector 7 detected the coming of a unnecessary part 9b in the rear end of the veneer board 9 transmits a cutting signal for the rear end to the control mechanism 8, and at the time when the unnecessary part 9b reaches the blade tip of the cutting blade 3, the oscillating mechanism 6 may act to oscillate the veneer board guide mechanism 4, 5 in opposite directions, and the veneer board 9 is cut obliquely. Whereby the unnecessary part of the veneer board is cut off in order.

Description

[Detailed description of the invention] The present invention relates to a veneer cutting device.

The present applicant has previously published the principle technology in, for example, "Method for cutting veneer"(4'? Publication No. 59-23241), and "Device for cutting veneer" (Japanese Patent Publication No. 54-6111). i
The improved technology is disclosed in "I Plate Cutting Apparatus" (Japanese Patent Publication No. 58-54005), which includes a pair of veneer transport bodies that rotate symmetrically and a cutting edge directed in the direction opposite to the direction in which the veneer is transported. is mainly composed of reciprocating cutting blades that alternately come into contact with the outlet side peripheral surfaces of the pair of veneer transport bodies, and uses the conveyance force of the veneer to cut the veneer! He developed and proposed a device that made it possible to cut uJ.

According to the devices disclosed in each of the above-mentioned publications, the advantage is not only that the intermediate plate can be cut without stopping the conveyance of the intermediate plate, but also that the preceding intermediate plate and the following intermediate plate can be reliably distinguished from each other with the cutting blade as the boundary. It was very convenient for cutting veneers to a fixed length and removing unnecessary parts, and was highly practical.

However, in all of those devices, by bringing the cutting edge of the cutting blade into contact with the exit side peripheral surface of the veneer conveyor,
Since the structure is designed to ultimately cut thin fluff, etc. of the veneer, at least one of the cutting edge of the cutting blade or the circumferential surface of the veneer carrier may simply be cut due to contact. There is a tendency for ff to decrease excessively compared to when contacting only with the plate,
In order to maintain a good cutting condition at all times, it is necessary to frequently replace at least one of the two members, which has the drawback of increasing maintenance and management costs.

Therefore, we proposed a new ``veneer cutting device'' (filed on November 18, 1988) in an attempt to overcome the shortcomings of the conventional device.

The cutting device of the new method includes a pair of veneer conveyors each having a plurality of grooves extending in the rotational direction at arbitrary intervals in the axial direction, and which are rotated symmetrically by a drive mechanism. and a cutter whose cutting edge is directed in the opposite direction to the veneer conveyance direction, and which is fixedly provided on the outlet side peripheral surface of any of the veneer conveyors at an interval that allows the veneer to pass through. The blades and their respective tip portions extending to the vicinity of the cutting edge of the 9J cutting blade through the grooves of the pair of veneer carriers move the veneer to one side and the other side of the cutting blade. (a pair of intermediate plate guide members whose ends are pivotally supported, and one surface of the cutting blade each time in response to a veneer cutting signal. The intermediate plate guide member, which is positioned to guide the veneer to the side, is provided with a swing mechanism that swings the intermediate plate guide member to a position where the veneer can be guided to the other side of the cutting blade.

With such a configuration, the cutting edge of the cutting blade and the circumferential surface of the veneer conveyor do not come into contact at all, so there is no risk of excessive wear on each member, and the disadvantages are eliminated while retaining the advantages of the conventional device. I was able to resolve it.

However, this new type of cutting device uses the friction between the veneer conveyor and the intermediate plate to convey the veneer, and also cuts the veneer against the exit side peripheral surface of any veneer conveyor. Because it adopts a structure in which the cutting blades are fixedly provided at intervals through which the plate can pass,
It has been found that there are cases where it is not always possible to properly seal the intermediate plate with the conveying force required to counteract the cutting resistance of the veneer, resulting in unstable cutting.

In other words, the conveying force using friction is limited by the coefficient of friction between the veneer conveyor and the veneer, so it is difficult to cut veneers with significant cutting resistance, such as veneers with abnormally crossed fibers. , J-cutting tends to be temporarily delayed due to insufficient conveying power.
Furthermore, in extreme cases, such as when a veneer is mistakenly carried in at an angle, cutting may become impossible, which tends to cause the inconvenience that the intermediate plate gets jammed in front of the intermediate plate conveyor.

Furthermore, for example, the outlet side peripheral surface of the veneer conveyor! , by setting the distance between the IJ cutting blade and the IJ cutting blade to suit thick veneers, when cutting thin veneers, the position where cutting resistance occurs and the position where conveying force is applied will depend on the thickness of the veneer being processed. As a result, there is a significant difference between the direction of the cutting resistance and the direction of the conveying force, and even though the conveying force is sufficient, cutting defects due to the above-mentioned discrepancy occur, resulting in the veneer being cut. Buckling is likely to occur between the intermediate plate carrier and the cutting blade, and in order to avoid this, each time the thickness of the veneer is changed, the outlet side peripheral surface of the veneer carrier and the cutting blade must be Since it is necessary to finely reset the interval between the two to correspond to the thickness of the intermediate plate to be processed, there is a possibility that other difficulties may arise, such as making position:A alignment extremely complicated.

The present invention was developed to solve both the difficulties of the new system and the shortcomings of the conventional system.
A pricking conveying member has a plurality of pricking bodies for pricking veneer in double rows around the periphery at arbitrary intervals in the axial direction, and is rotated in a fixed direction by a drive mechanism, a cutting blade fixedly provided in a position opposite to the conveying direction and with its cutting edge substantially parallel to and close to the outermost circumferential surface of the piercing conveying member; The tip portions extend from the sticking conveying member side of the intermediate plate through the intermediate plate, and from the other side of the veneer to the vicinity of the cutting edge of the cutting blade, respectively, from one side of the cutting blade and the other side of the cutting blade. A pair of veneer guide members are pivotably supported at their proximal ends so as to be able to swing between positions for alternately guiding the veneer to the side, and each time a veneer is cut in response to a veneer cutting signal, a cutting blade is moved. A veneer comprising a swinging mechanism that swings a veneer guide member positioned to guide the veneer toward one side of the cutting blade to a position where the veneer can be guided to the other side of the cutting blade. Suggest a cutting device.

According to the cutting device having such a configuration, the pricking and conveying action of the pricking and conveying member and the guiding action of the veneer guide member work synergistically to cut the veneer without stopping its conveyance. In addition, it is not only possible to reliably distinguish the leading veneer from the following veneer using the cutting blade as a boundary, but also because the cutting edge of the cutting blade does not come into contact with the outermost surface of the pricking and conveying member. ,
There is no risk of excessive abrasion of each member, and since the veneer is conveyed by pricking, a greater conveying force is exerted and cutting resistance is reduced compared to the case where a veneer is used. It is possible to cut large veneers without any problems, and furthermore, changes in the thickness of the veneer can be absorbed by changes in the amount of pricking, so the relative position of the pricking conveying member and the cutting blade can be adjusted to cut thin veneers. It is possible to set according to the direction of the cutting resistance and the direction of the conveying force, and it is difficult to cause cutting defects due to a discrepancy between the direction of the cutting resistance and the direction of the conveying force. Since it becomes almost unnecessary, we were able to solve both the shortcomings of the conventional fertilizer device and the difficulties of the new type of device.

1. If a separate stab conveying member that rotates symmetrically is provided in addition to the original stab conveying member, the conveying force can be applied in a distributed manner from the separate stab conveying member, so that it is possible to simply It was more effective in stabilizing cutting than when it was placed only on one side of the plate.

In addition, by setting the distance between the outermost surface of the stabbing conveyance member and the cutting blade to be narrower than the thickness of the veneer, conveyance force can be reliably applied to the veneer near the position where cutting resistance occurs. Because you get
Although it was extremely effective in stabilizing the cutting of all kinds of veneers,
Even if the interval is set wider than the thickness of the veneer,
This does not necessarily mean that all amputation becomes impossible;
In particular, if another symmetrically rotating puncture conveyance member is installed,
Since the conveying force could be applied in a distributed manner, there was no particular problem in cutting even if the interval was set considerably wider than the thickness of the veneer.

Hereinafter, the present invention will be described in more detail with reference to an example of implementation illustrated in the drawings.

FIG. 1 is an explanatory side view of a cutting device according to the present invention.

In the figure, 1 and 2 are roller-shaped pricking and conveying members each having a plurality of pricking bodies 1a and 2a for pricking a veneer in double rows around the periphery at arbitrary intervals in the axial direction. , outermost surface (
The protrusions 1a and 2a are arranged oppositely so that their trajectories (trajectories) of their tips are almost the same, and are continuously rotated symmetrically in the direction of the arrow shown in the figure by the driving action of a drive mechanism (not shown) consisting of various electric motors, etc. Then, the veneer 9 carried in via the carry-in conveyor 10 is stuck thereon and then conveyed in the direction of the arrow shown in the figure.

3 is a double-edged blade whose cutting edge is directed in the opposite direction to the conveying direction of the veneer 9 and is fixedly provided at a position substantially parallel to and close to the outermost circumferential surface of the pricking conveying member 1/2. A veneer 9 that is a cutting blade and is pricked and transported by the pricking and transporting member 1.2
However, due to the guiding action of the veneer guide members 4 and 5, which will be described later, 7,
Each time the veneer 9 is guided from one side to the other side, the veneer 9 is cut diagonally.

4Φ5 is a pair of veneer guide members each consisting of a plurality of pieces, which guide members from one side and the other side of the veneer 9 to the vicinity of the cutting edge of the cutting blade 3 through the rows of the piercing bodies 1as2a. As shown by solid lines and dotted lines, the respective tip portions 4a and 5a extending to the cutting blade 3 can swing between positions where they alternately guide the veneer 9 toward one side and the other side of the cutting blade 3. So, base end 4bφ
5b is pivoted by fulcrum shafts 21-22, and is alternately swung in the direction of the arrow shown in the figure by the swiveling action of a swiveling mechanism 6, which will be described later. 20) and the other side alternately.

Reference numeral 6 denotes a swinging mechanism consisting of a fluid cylinder, a cam, etc., which swings the veneer guide members 4 and 5 alternately to the positions shown by solid lines and dotted lines in response to the control of a control mechanism 8, which will be described later. .

Reference numeral 7 denotes a single-plate detector consisting of a plurality of phototubes, limit switches, etc. arranged orthogonally adjacent to the carry-in conveyor IO, and the contact points 7a, which are normally closed, are all opened. By doing so, the unnecessary part 9a of the front end of the veneer 9 is removed.
By detecting the passing of the veneer 9 and transmitting a cutting signal for the front end to the control mechanism 8 described later, one of the contacts 7a is closed, thereby detecting the arrival of the unnecessary portion 9b at the rear end of the veneer 9. Then, a rear end cutting signal is sent to a control mechanism 8, which will be described later.

Reference numeral 8 denotes a control mechanism which operates the swinging mechanism 6 based on the front end and rear end cutting signals transmitted from the single plate detector 7, with different delay degrees as necessary. control in a delayed manner.

The cutting device according to the end 11 is configured as described above, for example, in which the veneer detector 7 detects passage of the unnecessary portion 9a of the front end of the veneer 9 and sends a front end cutting signal to the control mechanism 8. Then, in response to the control of the control mechanism 8, the unnecessary portion 9
When a reaches the cutting edge of the cutting blade 3, the swing mechanism 6
Since the veneer guide members 4 and 5, which were initially in the position shown by the solid line in Fig. is guided to the side where the carry-out conveyor 20 is located, and the unnecessary portion 9a is removed below the carry-out conveyor 20.

Next, when the veneer detector 7 detects the arrival of the unnecessary part 9b at the rear end of the veneer 9 and sends a rear end cutting signal to the control mechanism 8, the unnecessary part 9b is cut off in response to the control of the control mechanism 8. When the blade 9b reaches the cutting edge of the cutting blade 3, the swinging mechanism 6 swings the veneer guide members 4 and 5 in the opposite direction, so that the veneer 9 is tilted as shown in FIG. The useful part is continuously guided to the side where the carry-out conveyor 20 is located, and the unnecessary part 9b is removed below the carry-out conveyor 20.
By repeating similar operations, it is possible to sequentially remove unnecessary portions of the RTI plate.

The embodiment illustrated in FIG. 4 is equipped with a stabbing conveying member 11 having a stabbing body 11a and a single-edged cutting blade 13 in a predetermined relationship position, and also has two surfaces on one side and the other side of the cutting blade 13. On the side, fixed length detectors 16 and 17 were installed adjacent to each other. Lower two-stage unloading conveyors 23 and 24 were provided, respectively, and a pair of veneer guide members 14 and 15, each consisting of a plurality of pieces, were installed at the tip of each. 1
4aψ15a pivots its base ends 114b and 15b by fulcrum shafts 21 and 22 in order to swing between the positions shown by solid lines and dotted lines, and swings based on the fixed length signals from the fixed length detectors 16 and 17. This is a gino cutting device configured such that the operation of the mechanism 6 is controlled by a control mechanism 18, and its operation mode is as described below.

That is, initially, if the veneer guide members 14 and 15 are in the position shown by the solid line, the strip-shaped veneer 19 carried in via the carry-in conveyor IO and the veneer conveyor 11 will be directed toward the lower carry-out conveyor 23 side. Eventually, the tip reaches the position of the fixed length detector 17, and when a fixed length signal is sent from the fixed length detector 17 to the control mechanism 18, it responds to the control of the control mechanism 18. The swing mechanism 6 is connected to the pair of veneer guide members 14 and 1.
5 is swung from the position shown by the solid line in FIG. 4 to the position shown by the dotted line, the strip-shaped veneer 19
is cut diagonally by the cutting blade 13, resulting in a fixed length intermediate plate 19a.
is formed, and the following band-shaped veneer 19 is guided to the upper stage delivery conveyor 24 side.

Next, when the front end of the strip-shaped veneer 19 reaches the position of the fixed length detector 16 and a fixed length signal is transmitted from the fixed length detector 16 to the control mechanism 18, the Since the swinging mechanism 6 swings the pair of f11 plate guide members 14 and 15 in opposite directions, the strip-shaped veneer 19 is cut diagonally by the cutting blade 13 and cut into a fixed shape, as illustrated in FIG. While the length veneer 19a is formed, the following band-shaped veneer 19 is guided to the lower carry-out conveyor 23 side, and thereafter, by repeating the same operation, it is possible to sequentially form the length veneer. It's a shot.

As is clear from the two illustrated embodiments, the cutting device according to the present invention stops the conveyance of the veneer by the synergistic effect of the prick conveying action of the tattoo conveying member and the guiding action of the veneer guide member. It is possible to cut the veneer without cutting, and it is also possible to reliably distinguish between the preceding veneer and the following veneer at the cutting blade as a boundary. Because it doesn't come into contact with the surface at all.

There is no risk of excessive wear on each member, and since the structure is such that the veneer is conveyed by pricking, a greater conveying force is exerted than when friction is used, and cutting resistance is significantly reduced. Large veneers can be cut smoothly, and changes in the thickness of the veneer can be absorbed by changes in the amount of pricking, so the relative position of the pricking conveying member and cutting blade can be adjusted to cut thin veneers. It is possible to set them together, and it is difficult to cause cutting defects due to discrepancies between the direction of the cutting resistance and the direction of the conveying force, and there is no need to make complicated position adjustments to avoid the occurrence of such cutting defects. Since it is almost unnecessary, the shortcomings of the conventional fertilizer device and the difficulties of the new type of device can be solved.

In addition, as in the embodiment shown in FIG. 1, if a separate prick conveying member that rotates symmetrically is installed in addition to the original prick conveying member, the needles can also be distributed from the other prick conveying member. Since it was possible to apply a conveying force, it was more effective in stabilizing cutting than when it was disposed only on one side of the veneer, as in the embodiment shown in FIG.

Furthermore, as in each of the above embodiments, if the distance between the outermost circumferential surface of the pricking and conveying member and the cutting blade is set to be narrower than the thickness of the veneer, then! /J Since it is possible to reliably apply a conveying force to the veneer as close as possible to the position where cutting resistance occurs, it is extremely effective in stabilizing the cutting of all kinds of veneers. Even if the thickness is set to be wider than the thickness of the needle, there is no possibility that all cutting will become impossible, especially if another symmetrically rotating stabbing conveying member is provided as in the embodiment shown in FIG.
Since the conveying force can be applied in a dispersive manner, there was no particular problem in cutting even if the interval was made considerably wider than the thickness of the veneer.

Further, the roller-shaped sticking conveyance member as in each of the above embodiments is
For example, the shaft part and the circular saw-shaped part with the piercing body are made separate parts,
Although it is relatively easy to form by fitting the latter into the former (with a spacer ring interposed if necessary),
The tattooing conveyance member is not limited to a roller shape, and is not shown in the figure, but even if it is, for example, a conveyor shape, it is basically a single tattoo conveyor member arranged in double rows around the periphery at arbitrary intervals in the axial direction. It suffices if it has a large number of pricking bodies and is capable of pricking and transporting veneers, and when installing another tattoo transporting member, the original pricking transporting member and another tattoo transporting member may be Even if the shapes are not necessarily completely symmetrical, or the positions of the rows of piercing bodies of each piercing conveyance member can range from completely opposing positions as in each embodiment to completely separate non-facing positions, You can change it as you like, and if necessary, you can prepare for displacement and rotation in the direction of moving one side toward and away from the other in order to improve the ability to follow significant changes in the thickness of the veneer. .

Furthermore, in each of the embodiments, a large regrinding type cutting blade was used, but it is also possible to use a so-called disposable small blade that is replaceably combined with conventionally known blade holders of various shapes. Furthermore, in principle, even if the thickness of the veneer is changed, there is no need to change the distance between the pricking conveyance member and the outermost circumferential surface, but if necessary, it is possible to By opening the
There is no problem even if the space is fixedly provided so that the interval can be changed, and "fixed" in the present application also includes such an embodiment.

Furthermore, the shape of the veneer guide member is not limited to the shape of each of the above-mentioned embodiments. It is sufficient to have a shape that allows the veneer to be guided alternately from side to side, and if necessary, in order to reduce frictional force and improve wear resistance, etc. There is no problem in applying the coating treatment, or the pivot position can be changed as appropriate.

Of course, as a means for transmitting a disconnection signal, in addition to the transmitting means as in the above embodiment, various conventionally known transmitting means may be used, and if necessary, it may also be transmitted artificially.
It is Noh.

In addition, centrifugal force acts on the veneer stuck to the sticking conveyance member as it bends, so the higher the processing speed, the more it tends to detach from the sticking conveyance member under its own weight. Depending on the situation, as in the embodiment shown in FIG. 4, an m-shaped peeling member may be provided at an appropriate position to force the separation, or as in the embodiment in FIG. If the pivot position of the member is set on the exit side of the pricking and conveying member, the pouch plate guide member will force the removal, which is convenient since there is no need to provide a separate peeling member.

Further, as an application example of the cutting device according to the present invention, the interval between the tips of the veneer guide members is set to be approximately the same as the thickness of the veneer, and the veneer guide members are fixed at the center of the fully swinging position to cut the veneer. By passing through the veneer, it is possible to cut (divide into two) the veneer in the thickness direction, which is useful for other uses such as forming a pair of veneers with extremely similar properties.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIG. 1 is an explanatory side view of a cutting device according to the present invention. 2 and 3 are explanatory diagrams of the operation of the cutting device shown in FIG. 1, FIG. 4 is a side explanatory diagram of another embodiment of the cutting device according to the present invention, and FIGS. 5 and 6 are diagrams illustrating the operation of the cutting device shown in FIG. FIG. 3 is an explanatory diagram of the operation of the cutting device. 1.2. No. 11: Stabbing conveyance member, 3.13: Cloth/cutting blade, 4, 5, 14, 15: Φ veneer guide member, 6...
Swing mechanism, 7... Middle plate detector, 8, 18, φ, control mechanism, 9, 19... Single plate, lO... Loading conveyor, 1
6.17... Fixed length detector, 21.22... Fulcrum shaft 2
0.23.24... No. Export Conveyor Patent Applicant Meinan Seisakusho Co., Ltd. Figure 3 Figure 2 Figure T' Figure 6 ()i3 Figure 5

Claims (1)

[Scope of Claims] 1. A pricking and conveying member that has a large number of pricking bodies for pricking veneer in double rows around the periphery at arbitrary intervals in the axial direction, and is rotationally driven in a fixed direction by a drive mechanism. and a cutting blade whose cutting edge is directed in the direction opposite to the conveying direction of the veneer and is fixedly provided at a position where the cutting edge is approximately parallel to and close to the outermost circumferential surface of the pricking and conveying member; Each of the tip portions extends from the pricking conveying member side of the veneer through the rows of the pricking bodies, and from the other side of the veneer to the vicinity of the cutting edge of the cutting blade,
A pair of veneer guide members each having a base end pivotally supported so as to be swingable between positions for alternately guiding the veneer to one side and the other side of the cutting blade; Each time in response to a cutting signal, the veneer guide member, which is in a position to guide the veneer to one side of the cutting blade, is swung to a position where it can guide the veneer to the other side of the cutting blade. A veneer cutting device comprising a moving mechanism. 2. The veneer cutting device according to claim 1, further comprising another pricking and conveying member that is rotatably driven symmetrically to said pricking and conveying member by a drive mechanism on the other side of the veneer. 3. The veneer cutting device according to claim 1 or 2, further comprising a cutting blade arranged at an interval narrower than the thickness of the veneer on the outermost peripheral surface of the pricking and conveying member.