JPH0251721B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for suctioning and lifting stacked veneer veneers (hereinafter referred to as veneers) one by one, starting from the top one.

In the past, sucking up veneers and separating them one by one has been widely used as a conventional method, but veneers often have cracks and knots, especially in thin veneers, where there are conduits that penetrate the front and back surfaces. The problem was that the suction force was applied to the lower veneer through these missing parts, attracting not only the top veneer but also the second and third veneers. As a result, the veneer is damaged or clogged in the subsequent process, forcing various equipment to stop, resulting in a yield loss and a drop in efficiency. In addition, as mentioned above, even the second or third veneer will be sucked in, so it will not work on horizontally wavy veneers with gaps at the joint edges, or groups of single-layer veneers that are not joined and are lined up at a constant width. In addition, the above-mentioned troubles are expected in the process of inserting the veneer into the roll dryer or supplying the medium veneer to the gluing device, and it will inevitably be necessary to rely on manual labor. It was not profitable.

The present invention has been made to solve these drawbacks, and provides a veneer suction method and device that reliably lifts only the topmost veneer.
The following description will be given based on the illustrated embodiment.

First, to explain the invention of the first method, this method involves suctioning the stacked veneers one by one starting from the top one, and in the step of lifting the veneers, the topmost veneer is sucked, In the lifted state, by changing the positional relationship between the part that directly suctions the surface of the veneer and the part that does not, the lower part of the veneer is suctioned through the notch formed in the uppermost veneer. This method is characterized by dropping a veneer and lifting only the top veneer, and the top veneer is suctioned, and in the lifted state, the surface of the veneer is directly suctioned and the suction Regarding the point of changing the positional relationship with the parts that are not covered, the first embodiment shown in Figs. 1 to 3, the second embodiment shown in Fig. 4, and Figs. 6, 7, and 8. As in the third to fifth embodiments shown in the figures, the part that directly sucks the surface of the veneer (hereinafter referred to as the suction part)
When one or more non-suction parts (hereinafter referred to as non-suction parts) in the inside are moved appropriately, the sixth embodiment shown in Figs. 9 to 11, the sixth embodiment shown in Figs. 13 and 14 7th Example, Figures 15-1
As in the eighth embodiment shown in FIG. 9a and the ninth embodiment shown in FIG. As in the 10th to 14th embodiments shown in FIGS. 21 to 26, the suction part and the non-suction part are arranged alternately, and the suction part is replaced with the non-suction part, and the non-suction part is replaced with the suction part at the same time. In this case, as in the 15th embodiment shown in FIG. 27, the suction parts are arranged in two rows in a zigzag pattern and the suction part is switched from one row to the other row, and the embodiment device described in this application and devices similar thereto all implement the invention of this method. Therefore, the embodiments of each device invention will be described one after another in place of a description of the method invention.

The second to sixth inventions are device inventions for carrying out the first method invention,
The second invention is a suction device that suctions and lifts stacked veneers one by one starting from the top, in which a part of the suction port of a suction hood is closed, and even if the closed position is the same as that of the suction The present invention relates to a suction hood characterized by being provided with a shutoff valve that moves over the entire area of the mouth. Here, the suction port refers to an opening that comes into contact with the surface of the veneer.

Figures 1 to 3 show an example of the implementation of the present invention, in which a plurality of veneers 2 are placed on a suitable mounting table 1 such as a lifter that can automatically adjust the height to a set position. It is deposited. The veneers 2 are stacked in advance so that the fiber direction is substantially the same as the veneer transport direction a, as shown in FIG. A suction hood 3 having a suction port 3a is arranged, and the suction hood 3
An exhaust device 5 is connected to the upper part of the duct via a bellows-shaped duct hose 4. The suction hood 3 is
As will be described later, it is preferable to use a fluid cylinder device 6 or the like to move up and down, but in some cases, the suction hood 3 may be fixed and the mounting table 1 can be moved up and down each time the veneer 2 is sucked. good.

The suction port 3a of the suction hood 3 is provided with a shutoff valve 7 that closes a part of the suction port 3a and whose closed position moves over the entire area of the suction port, and the shutoff valve 7 is moved back and forth. In order to do this, the shutoff valve 7 is provided via a male screw 9 which can be rotated forward and backward by a motor 8, and a female screw 10 which is screwed into the male screw 9.
This shutoff valve 7 slides on the surface of the top veneer,
Missing parts 2a such as cracks and knotholes formed in the veneer;
Or, when a plurality of narrow-width veneers are lined up at regular width intervals and one layer of veneers is suctioned, the shutoff valve closes the gap between each veneer and blocks the suction force to the veneer below. The width l1 of No. 7 is approximately the same as or slightly wider than the maximum allowable length l of the missing portion 2a (this l is defined in the JAS standard) or the width of the gap between each of the veneers. Set to . The number of them also depends on the size of the suction port 3a of the suction hood, but it is usually preferable to have about 2 to 4 because the amount of movement of the shutoff valve 7 is small. Reference numeral 11 denotes a detector such as a limit switch, which is provided for setting the amount of movement of the shutoff valve 7. When a male screw 9 is rotated by a motor 8, the shutoff valve 7 moves and the detector 1 is moved.
It is appropriately electrically controlled so that it stops when it comes into contact with 1 and 11. As a means for reciprocating the shutoff valve 7, it is possible to use mechanisms such as a cylinder device, a link, an eccentric, etc. in addition to the illustrated embodiment.

By lowering, for example, the suction hood 3 in which the shutoff valve 7 moves within the suction port 3a, the uppermost veneer stacked can be suctioned. In this case, if there is a missing part 2a in the top veneer 2 as shown in Figures 3 and 5a, the suction force will also act on the lower veneer, and the two veneers will be suctioned at the same time. The suction hood 3 will be raised. (See Figure 5a) However, by moving the shutoff valve 7 with the topmost veneer lifted, a portion ( The position of the non-suction portion (non-suction portion) can be changed, and when the stop valve 7 reaches the missing portion 2a present in the uppermost veneer, the missing portion 2a
The suction force no longer acts on the lower veneer that is being sucked through, and the lower veneer naturally falls as shown in Figures 5b and 5c.

In the figure, reference numeral 12 indicates a guide shaft for guiding the raising and lowering operation of the suction hood 3, reference numeral 13 indicates a bearing fixed to the suction hood 3, and both the fluid cylinder device 6 and the guide shaft 12 are fixed to a holding base 16. , a cylinder or the like, and is configured to be rotatable at a fixed angle around a rotation shaft 14. Detectors 17 and 17a are provided at the top dead center and bottom dead center of the suction hood 3, and are automatically controlled so that the suction hood 3 moves up and down as appropriate. 18 is a feed roller that sends the veneer lifted one by one to the next process; 19 is a motor that drives the feed roller;
Reference numeral 20 denotes a presser roller that peels off the veneer from the suction port 3a and sends the peeled veneer together with the feed roller 18, and 21 is an operating device for the presser roller.

FIG. 4 shows another embodiment in which the suction port 3a of the suction hood 3 is covered with a perforated plate 22 having a large number of holes 22a. If the valve 7 is moved as described above, even for a thin veneer with a thickness of about 0.6 mm used for the front and back plates of plywood, the thin veneer will flex into the inside of the suction port 3a. , it is possible to effectively eliminate the situation of contact with the shutoff valve 7.

6a and 6b, FIG. 7, and FIG. 8 respectively show other embodiments in which the non-suction portion in the suction port is sequentially moved to drop the lower veneer as described above. 6A and 6B and FIG. 7, the rotatable on-off valve 23 is sequentially opened and closed to close the suction port 3a of the suction hood 3. The on-off valves 23 rotate around a shaft 24, and one or more on-off valves are sequentially opened and closed from the left and right sides of the suction port 3a, or from the center. Appropriate means such as a cylinder or a cam can be used as the device for opening and closing.
When the opening/closing valve 23 closes the cutout 2a formed in the uppermost veneer, the inflow of air through the cutout 2a is cut off, causing the lower veneer to fall as shown in Figure 6b. . Reference numeral 25 in FIG. 7 indicates partition plates that partition the inside of the suction hood 3, and an on-off valve 23 is rotatably attached to the upper end of each partition plate.

FIG. 8 shows that each suction port block partitioned by a partition plate 25 is sequentially closed by rotating a rotating body 26 in which one or more shutoff valves 26a are installed in a spiral manner. Its action and effect are the same as above.

Next, the third invention will be explained. This third invention is a suction device that suctions and lifts stacked veneer veneers one by one, starting from the top, and has a suction hood with a plurality of openings drilled in the suction port. This invention relates to a suction hood characterized in that a plate is disposed so as to close the suction port, and an operating mechanism is provided for moving the adjustment plate along the opening surface of the suction port. This will be explained according to FIGS. 9 to 11. When representing the same parts as in each of the above embodiments, the same reference numerals will be used and the explanation will be omitted.

At the suction port 3a of the suction hood 3, which is configured to be able to be raised and lowered by lifting, there is an adjusting plate 2 in which a plurality of openings 27a are bored in a sliding groove 3b bored inside the opening end of the suction port 3a.
7 is slidably provided, and a reciprocating mechanism 28 such as a cylinder for sliding the adjustment plate 27 is connected thereto. The interval l between each opening 27a of this adjustment plate 27
1 is set to be the same as or larger than the width l of the cutout part 2a that is allowable for the plywood product, as shown in FIG. It is desirable to do this in order to allow the lower veneer to fall. The adjusting plate 27 is preferably made of a plastic plate, plated, fluorocarbon resin, or other surface-treated material with low friction so that it can easily slide on the surface of the veneer. On the other hand, it is better to use a material with high friction, such as rubber, for the rim.

As shown in FIG. 9, the reciprocating mechanism 28 sucks the topmost veneer 2 with the suction hood 3, and in a state where it is lifted a certain distance, operates the adjustment plate 27 one way or reciprocates once or several times. Detectors 28a, 28a such as limit switches
It is electrically controlled by.

In the suction hood configured in this way,
Missing part 2 on the top veneer that was sucked and lifted
Even if the gap 2a exists, by moving the adjusting plate 27, the missing part 2a can be closed by the adjusting plate 27, and therefore the lower veneer that has been sucked through the missing part 2a will fall. , it is possible to lift only the top veneer.
(See FIGS. 12a and 12b) FIGS. 13 and 14 show other embodiments of the invention, in which the adjustment plate 27 are arranged so as to be freely slidable, which eliminates the friction caused by contact between the veneer 2 and the adjustment plate 27, and is effective in preventing damage to the veneer 2.

The fourth invention is a suction device that suctions and lifts the stacked veneers one by one starting from the top one, and the suction port of the suction hood is closed with a plate having a plurality of openings, and the The first invention relates to a suction hood characterized in that an adjusting plate with a plurality of openings bored inside the suction hood is slidably disposed, and an operating mechanism for sliding the adjusting plate is provided.
Examples thereof are shown in FIGS. 5 to 19a.

The present invention covers the suction port 3a of the suction hood 3 with a plate 29 having a plurality of openings 29a,
The opening 2 of the plate to the inside of the plate 29
A plurality of protrusions 2 that engage with 9a and protrude downward
An adjusting plate 27 having a protruding portion 7b and a plurality of openings 27a is slidably disposed.
It is constructed by attaching a reciprocating mechanism 28 such as a cylinder to one end of the reciprocating mechanism 28. At this time, plate 29
The pitch l1 of the opening of the adjustment plate 27 and the pitch l2 of the opening of the adjustment plate 27 are both approximately equal to or slightly wider than the width l of the cutout 2a that is allowable for the plywood product, as shown in FIG. shall be. Also, both openings 27
The shape and size of a and 29a are arbitrary, but usually the opening 27a of the adjusting plate is set to the opening 2 of the plate.
Form larger than 9a.

Figures 19b and 19c illustrate the suction in such a device;
This is an example of a lifted state, in which the lower veneer is sucked through the cutout 2a formed in the uppermost veneer, and as the adjustment plate 27 moves, it naturally falls and is separated.

FIG. 20 shows the plate 29 in the above embodiment.
The opening of the plate 29 is formed with a large number of punched holes 29b, and the adjusting plate 27 is configured to slide on the upper surface of the plate 29. Configuring so that the adjustment plate 27 does not come into direct contact with the surface of the veneer 2 in this way,
Although this is effective in protecting the veneer 2, the same effect can be achieved by interposing a cloth or net between the plate 29 and the veneer 2 in the devices shown in FIGS. 15 to 19a. It is possible to demonstrate this.

Figures 21 and 22 show the opening 2 of the plate.
9a and the opening 27a of the adjusting plate are formed to have approximately the same size (the opening 27a of the adjusting plate may be slightly larger), and the openings 29a of the plate are arranged at equal intervals, This shows a suction hood in which alternately arranged suction parts and non-suction parts can be replaced at the same time by appropriately moving the adjustment plate 27 using the operating mechanism 28. FIG. 21 shows the opening of the adjustment plate. Insert the pitch of 27a into the opening 2 of the plate.
The adjustment plate 27 is arranged with twice the pitch of 9a.
While the structure is such that it moves back and forth in the horizontal direction,
In FIG. 22, the openings 27a of the adjustment plate are arranged in two rows with an interval twice the pitch of the openings 29a of the plate, and the openings 27a are arranged in a staggered manner. By reciprocating the adjusting plate 27 in the vertical direction, the suction section and the non-suction section are simultaneously replaced as described above.

In this way, the suction part and the non-suction part are arranged alternately, and the positional relationship between the two is changed by simultaneously replacing the suction part with the non-suction part and the non-suction part with the suction part (Fig. 23a, b) As another means, the devices shown in FIGS. 24 to 26 are also conceivable.

That is, FIG. 24 shows an on-off valve 3 that is provided with partition plates 25 that partition the inside of the suction hood 3 at equal intervals, and that closes and opens each partitioned block one or more blocks at a time.
0 is slidably provided, and the closing position is changed by moving the opening/closing valve 30 laterally. FIG. There is a closing piece 31a on the outer periphery.
It has a structure in which a rotary body 31, which is installed in a staggered manner, is alternately rotated back and forth, and FIG. 26 shows a plurality of suction hoses 32 derived from two suction hoods 3, 3 having two exhaust devices 5, , arranged alternately,
The two exhaust devices are turned ON and OFF alternately to change the positional relationship between the suction section and the non-suction section. In the embodiments shown in FIGS. 24 and 25, a partition plate 25 is used to partition the area from the suction port that contacts the surface of the veneer to the opening/closing position of the on-off valve 30 or rotating body 31. Each block is suctioned or closed by the on-off valve 30 or the rotary body 31, and the suction portion is not switched at the suction port, that is, at the position where it almost contacts the surface of the veneer. Therefore, these embodiments are also effective in terms of protecting the veneer as described above.

The above is an explanation of the suction method and the suction hood when the non-suction part changes within the same suction port or when the suction part and the non-suction part are arranged in a line, but the basic technology of the present invention The idea, that is, the first invention, is not limited to these cases, and as long as the lifted state can be maintained, the positions of the suction part and the non-suction part can be changed in any way. be.

Therefore, as shown in FIGS. 27a and 27b, a method may be used in which the rows of suction parts are changed in the lifted state, and the present method invention can also be carried out by such an apparatus. That's what happens.

Figures 27a and 27b show a suction device that suctions and lifts stacked veneers one by one, starting from the top one, and has two or more suction ports, and is a switchable device for switching the suction by each suction port. This device is characterized in that it is provided with a device, that is, an embodiment of the fifth invention, in which the central part of the suction hood 3 is partitioned into two by a partition plate 25, and the suction hood 3 is installed on a rotating body 33. Due to the function of the shutoff valve 33a, the partition plate 25
The suction of each block divided by 1 is alternately switched. Moreover, the suction port of the suction hood 3 is
As shown in Figure 7b, the openings 34a are staggered from side to side.
Therefore, even if there is a missing part 2a in the top veneer as shown in FIG. As shown in Figure b, the missing portion is closed and the lower veneer falls. However, this plate is not necessarily necessary, and becomes unnecessary if the suction hood is arranged parallel to the fiber direction of the veneer. In the figure, numeral 35 is an operating mechanism for reciprocating the rotating body 33. In this way, the suction parts are arranged in two rows in a zigzag pattern, and the positional relationship between the suction parts and the non-suction parts is changed by switching the suction parts from one row to the other, and only the topmost veneer is used. It sucks up the.

The suction device shown in FIG. 26 is also included in the concept of the fifth invention as a device invention.

As described above, the present invention suctions the stacked veneers one by one starting from the top one, lifts it up, and in the lifted state changes the positional relationship between the suction part and the non-suction part as appropriate. Therefore, the gap formed in the uppermost veneer can be effectively and appropriately closed, and the suction force acting on the lower veneer can be cut off. As mentioned above, the veneers deposited here include a group of multiple veneers that are joined or not joined to a certain width, and after being lifted, It goes without saying that this includes both cases of transfer in the fiber direction and cases of transfer in a direction perpendicular to the fiber direction.

As described above, the present invention can reliably separate only the uppermost veneer, prevent troubles and damage to the veneer in post-processes, and have significant effects on yield improvement, process automation, labor saving, etc. It has a great potential to contribute to the plywood industry.

[Brief explanation of the drawing]

The drawings show an example of carrying out the present invention, and FIG. 1 is a side view showing the state in which the suction duct according to the second invention is used, FIG. 2 is a front view of the same, and FIG. 3 is a cross-sectional view of the suction duct. 4 is a cross-sectional view of the suction duct showing another embodiment, FIGS. 5a to 5c are explanatory diagrams showing the operating state, FIGS. The figure is a longitudinal sectional view of a suction duct showing another embodiment,
FIG. 9 is a side view showing the usage state of the suction duct according to the third invention, FIG. 10 is a front view of the same, and FIG.
The figure is a cross-sectional view of the suction duct, FIGS. 12a and 12b are explanatory diagrams showing its operating state, FIG. 13 is a vertical cross-sectional view of the suction duct showing another embodiment, and FIG. 14 is a cross-sectional view of the same. Fig. 15 is a side view showing the state in which the suction duct according to the fourth invention is used, Fig. 16 is a front view thereof, Fig. 17 is a cross-sectional view of the suction duct, and Fig. 18 is a diagram showing the relationship between the plate and the adjusting plate. Exploded diagram showing the relationship, 1st
9a is a cross-sectional view of the suction hood of the device illustrated in FIG. 15, FIGS. 19b and c are explanatory views showing the operating state of the device illustrated in FIGS. 15 to 19a,
Figure 0 is a cross-sectional view of a suction duct showing another embodiment,
21 and 22 are cross-sectional views of a suction duct having a mechanism in which a suction part and a non-suction part are replaced at the same time, 23a and 23b are explanatory diagrams showing its operating state, and 24th
Fig. 26 is a vertical sectional view of a suction duct showing other embodiments, Fig. 27a is a longitudinal sectional view of a suction device according to the fifth invention, and Fig. 27b is a bottom surface of a suction hood in the same device. Explanatory diagram showing Figure 28a, b
is an explanatory diagram showing its operating state. 1... Mounting table, 2... Single plate, 2a... Missing part,
3... Suction hood, 3a... Suction port, 3b... Sliding groove, 4... Duct hose, 5... Exhaust device, 6
...Fluid cylinder, 7...Shutoff valve, 8...Motor, 9...Male thread, 10...Female thread, 11...
Detector, 12... Guide shaft, 13... Bearing, 14... Rotating shaft, 15... Actuating device, 16...
... Holding stand, 17, 17a ... Detector, 18 ... Feed roller, 19 ... Motor, 20 ... Press roller, 21 ... Actuation device, 22a ... Punch hole,
22... Perforated plate, 23... On-off valve, 24... Shaft,
25... Partition plate, 26... Rotating body, 26a...
Shutoff valve, 27...adjustment plate, 27a...opening, 2
7b... Protrusion, 28... Operating mechanism, 28a...
Detector, 29... plate, 29a... opening,
29b...Blowout hole, 30...Opening/closing valve, 31...Rotating body, 31a...Shutoff valve, 32...Suction hose,
33... Rotating body, 33a... Closing valve, 34a...
Opening, 34... plate, 35... operating mechanism.

Claims (1)

[Scope of Claims] 1. In the step of suctioning and lifting the stacked veneer veneers one by one starting from the top one, the topmost veneer veneer is sucked and while the veneer veneer at the top is lifted, the By changing the positional relationship between the part that directly suctions the surface and the part that does not suction, the lower veneer veneer being suctioned falls through the cutout formed in the uppermost veneer veneer, A veneer veneer suction method characterized by lifting only the topmost veneer veneer. 2. The veneer veneer according to claim 1, in which one or more non-suction parts of the part that directly suctions the surface of the veneer veneer are appropriately moved to change the positional relationship between the two. How to suck it up. 3. Parts that directly suction the surface of the veneer veneer and parts that do not suction are arranged alternately, and the positional relationship between the two is changed by appropriately moving the whole while maintaining this state, as claimed in claim 1. How to suck up veneer veneer as described. 4. The positional relationship between the veneer veneer is determined by alternately arranging the parts that directly suction the surface and the parts that do not suction, and simultaneously replacing the suction parts with the non-suction parts and the non-suction parts with the suction parts. A method for sucking up a veneer veneer according to claim 1, which changes the veneer veneer according to claim 1. 5. Parts that directly suck the surface of the veneer veneer are arranged in two rows in a zigzag pattern, and the positional relationship between the two is changed by switching the parts that suck from one row to the other row. Method for sucking up veneer veneer as described in item 1. 6 In the suction device that suctions and lifts the accumulated veneer veneers one by one starting from the top, set a shutoff valve that closes a part of the suction port of the suction hood.
Alternatively, a plurality of shut-off valves are provided, and a shut-off valve operating mechanism or control mechanism is further provided to sequentially move the closed position of the shut-off valve over the entire area of the suction port, and to sequentially move the closed position of the suction port. suction hood. 7 In the suction device that suctions and lifts the accumulated veneer veneers one by one starting from the top one, the suction port of the suction hood is covered with an adjustment plate with multiple openings. 1. A suction hood, characterized in that the adjusting plate is arranged as shown in FIG. 8. The suction hood according to claim 7, wherein the adjustment plate is slidably disposed inside a perforated plate disposed so as to close the suction port of the suction hood. 9 In a suction device that suctions and lifts the accumulated veneer veneers one by one starting from the top one, the suction port of the suction hood is closed with a plate having multiple openings, and multiple veneers are sucked into the inside of the plate. 1. A suction hood, characterized in that an adjustment plate having an opening formed therein is slidably disposed therein, and an operating mechanism for sliding the adjustment plate is provided. 10 The openings in the plate and the adjustment plate are formed to have the same size, and the openings in the plate are arranged at equal intervals, and the openings in the adjustment plate are spaced apart by a distance twice the said interval. 10. The suction hood according to claim 9, wherein the operating mechanism is configured such that the opening of the adjustment plate sequentially moves and overlaps the opening of the plate. 11 The openings of the plate and the adjustment plate are formed to have the same size, and the openings of the plate are arranged at equal intervals, and the openings of the adjustment plate are spaced apart by a distance twice the said interval. 10. The suction hood according to claim 9, wherein the actuating mechanism is configured such that the adjustment plates are arranged in two rows and in a staggered manner, and the openings in the two rows of the adjusting plate alternately overlap with the openings in the plate. 12 A suction device that suctions and lifts stacked veneer veneers one by one starting from the top one, has two or more suction ports and is equipped with a switching device to switch the suction by each suction port. Characteristic suction device.