JPH0237281B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the separation and supply of veneer veneers cut by a veneer race, veneer slicer, etc. The present invention provides a method for reliably separating the upper layer and supplying it to the next process, and an apparatus that can directly carry out this method.

Conventionally, when supplying only the topmost veneer veneer from a pile of veneer veneers, it has been suctioned and held via a vacuum suction mechanism, or stuck and held by the piercing action of a needle-like object. However, 2
Since more than one sheet of veneer is often fed at the same time, workability in the next process is significantly reduced.

Generally, veneer veneer has conduit grooves, knotholes, fissures,
There are scattered cracks, etc., and when suctioning, the second or lower veneer veneer is simultaneously suctioned through these conduit grooves, or due to resin-containing wood or tape attached parts found on repaired veneers. Since the veneer veneers are lightly adhered to each other during stacking, the veneer veneers may rise as a result, and depending on the wood species, the negative pressure generated between the veneer veneers may cause the veneer veneer itself to become moist. Even when the condition was maintained, the phenomenon of simultaneous adsorption of the second and subsequent veneer veneers as described above was observed.

In addition, in the latter case, due to excessive or insufficient pressing force during pricking, not only the top veneer veneer but also the second and subsequent veneers may be pierced at the same time, or the veneer veneer may be stuck simultaneously. In some cases, it may not be possible to obtain the holding force to raise the temperature.

In view of the above description, the present invention fixes a suction device having a conveyor above when separating and supplying the topmost veneer veneer from a pile of veneer veneers placed on a lifting platform. In addition, the suction mechanism that gives buoyancy to the veneer veneer can be raised and lowered, and the vacuum suction mechanisms of both are used to selectively adsorb and hold the veneer veneer while transporting the veneer by hanging it on the front of the veneer. The driving force of the conveying body is applied to the slip state, and then the adsorption and holding near the center of the veneer veneer is released by the downward movement of the detachment actuating body, and the driving force of the conveying body is applied to the veneer veneer. In particular, if the veneer veneer plate to be separated and supplied has the above-mentioned conduit grooves, etc., when the veneer veneer is suctioned by the suction mechanism that can be moved up and down, the position near the suction must be set in advance. A method of the present invention and a device for directly carrying out this method are attached. First, the configuration will be explained based on an embodiment shown in the drawings.

A pile 3 of veneer veneers 2 is placed on a lift table 1, and its upper surface position is always maintained at a constant height by an appropriate detection device (not shown).

A suction duct 5 whose upper part is connected to a vacuum generator (not shown) is attached to a machine frame 4 installed at an appropriate position above and in front of the pile pile 3, and a bottom opening end of this suction duct 5 is attached. A suction device 7 is constructed by forming a plurality of pairs of notches 6 at regular intervals.

On the other hand, on both sides of the plywood veneer 2 transport direction of the suction device 7, a frame body 9 suspended from the machine frame 4 via a support member 8 is rotated by an appropriate drive device (not shown). A pair of rollers 10, 10' are supported in parallel, and the pair of rollers 10, 10'
In between, there is a conveying body 1 in which a plurality of belts 11 are suspended through the gap between the notches 6 of the suction device 7.
2 is installed. The belt 11 is made narrow or perforated so as not to reduce the suction force of the suction device 7 against the veneer veneer 2.

At the rear of the carrier 12, a suction mechanism 13 having the following configuration is arranged. This suction mechanism 1
3 through a flexible telescoping duct 14,
The upper part of the suction box 15 is connected to a vacuum generator (not shown), and the tips of the piston rods 17 of the pair of fluid cylinders 16 pivotally supported on the machine frame 4 are attached to both sides of the suction box 15. It is attached horizontally via an attached bracket 18, and its upper limit position is above the lower surface of the conveyor 12,
Further, by the operation of the fluid cylinder 16, it is possible to move up and down the pile 3 of the veneer veneer 2.

Further, a small fluid cylinder 19 with a small operating stroke is pivotally supported at the lower end of a bracket 18 attached to both sides of the suction box 15, and a piston rod 20 that surrounds the suction box 15 is attached to the tip of the piston rod 20. A rectangular knock-off bar 21 is locked on the outer side of the four peripheries, and constitutes a detachment actuating body 22.

The lower limit position of this knock-off bar 21 is the same as the lower surface of the carrier 12, or is slightly lower,
In the normal state, it is located at the same level as the lower surface of the suction box 15, or slightly above it.

In particular, depending on the properties of the veneer veneer 2 to be separated and supplied, an injection mechanism 23 having the following configuration is arranged near the outside of the suction mechanism 13, and when suctioning the veneer veneer 2,
This promotes interlayer separation from the veneer veneer 2' below.

That is, this injection mechanism 23 is the adsorption mechanism 13.
A pair of fluid cylinders 24 are pivotally supported on the machine frame 4, and an injection box 26 has a piston rod 25 with a slit, a nozzle, etc. drilled in its bottom surface at the tip of the piston rod 25.
The upper limit position is maintained above the lower surface of the detachment actuating body 22, and the injection box 26
It is connected to an injection generating device (not shown) via a flexible telescopic duct 27 from each upper open end of the duct.

Incidentally, an elastic body 28 such as rubber is attached to the bottom surface of the injection box 26 as necessary to prevent leakage of the injection air.

In addition, 29 in the figure is a guide roll that conveys the veneer veneer 2 to the next process.

Next, the operation of this embodiment will be explained.

First, place the upper surface of the pile 3 of the plywood veneer 2 on the lifting platform 1.
At the same time, the suction device 7 and suction mechanism 13 are kept in the suction state at all times, and the conveyor 12 is kept in the drive state at all times, so as to stand by at the upper limit position.

In this state, when the fluid cylinder 16 pivotally supported on the machine frame 4 is operated, the flexible duct 14
extends through the piston rod 17, and the suction box 1
5 is lowered to near the center of the pile 3 of the veneer veneer 2 (see Fig. 4A). When the lower surface of the suction box 15 comes into contact with the uppermost veneer veneer 2 horizontally, the veneer veneer 2 The vicinity of the center will be sucked to a limited extent, and then the fluid cylinder 16 will operate in reverse to raise the suction box 15.
Plywood veneer 2 rising while being held in a suction state
At a position close to the upper limit, its front part is also attracted by the suction device 7, and reaches the upper limit (see FIG. 4B).

For this reason, the front part of the veneer veneer 2 is suctioned by the suction device 7, and the central part by the suction box 15, in a slightly upward position compared to the front part. The belt 11 of the conveyor 12 is interposed on the upper surface of the belt in a driving state, and its driving force is maintained in a slip state by the suction movement near the center.

Thereafter, when the small fluid cylinder 19 is operated to extend its piston rod 20, the rectangular knock-off bar 21 rapidly descends to the outside of the four peripheries of the suction box 15, that is, to the vicinity of the center of the veneer veneer 2 in the suction state. In order to instantly release the suction state near the center by applying an impact, the veneer veneer 2 is suctioned only by the suction device 7 at the front, and the belt 11 of the conveyor 12 is driven by the guide roll 29. (see FIG. 4C), and after operation, the knock-off bar 21 immediately returns to its original position by reverse operation of the fluid cylinder 19.

At this time, if the topmost veneer veneer 2 is in an excessively wet state, or if it passes through the conduit groove and is further damaged by negative pressure development that occurs during suction, the pile of piles 3
The second and subsequent plywood veneers 2' inside are attached to the suction box 15.
Even if the veneer veneer 2' is simultaneously adsorbed at the same time and is subsequently adsorbed separately, even if it is simultaneously adsorbed, the second and subsequent veneer veneers 2' are separated and dropped onto the pile 3, and only the topmost veneer veneer 2 is to be supplied as described above.

Here, due to the above-mentioned impact movement, the second and subsequent veneer veneers 2' engage in a complicated manner with the uppermost veneer veneer 2 on the way to being conveyed by the conveyor 12, causing them to fall onto the pile 3. If the uppermost veneer veneer 2 remains in the hollow state, immediately after the uppermost veneer 2' has been conveyed, the suction box 15 located at the upper limit position is used to vacuum the second and subsequent veneer veneers 2' near the center. This means that the two sheets are suctioned and held, thereby reliably preventing two sheets from being conveyed at the same time.

In addition, conduit grooves, knot holes, fissures, cracks, etc. are noticeably scattered in the pile 3 of the veneer veneers 2 placed on the lifting platform 1, and furthermore, the veneer veneers 2 are piled up during the pile up.
If there is light adhesion between the parts, the injection mechanism 23 is also used.

That is, as shown in FIG. 4D, before the central portion of the veneer veneer 2 is suctioned by the suction box 15, the fluid cylinder 24 is actuated in advance, and the piston rod 25 extends to cause the injection. The box 26 is lowered to the vicinity of the center of the veneer veneer 2, and air is injected through the scattered conduit grooves, etc. to form an air layer with the second and subsequent veneer veneers 2' to promote separation between the layers.
After that, the steps described above are performed.

In this example, the lifting and lowering movements of the detachment actuator are as follows:
For convenience, a small fluid cylinder 19 is used in the explanation, but it is optional to replace this with a mechanical mechanism such as a cam mechanism or a crank mechanism.

As described above, according to the present invention, when separating and supplying the uppermost veneer veneer from the pile of veneer veneers placed on the lifting platform, the suction device having the conveyor is moved above the front part of the pile of veneers. A suction mechanism that gives a buoyancy force to the veneer veneer is placed behind it so that it can be raised and lowered, and by the vacuum suction mechanism of both, the veneer veneer is once separated and slightly curved. At the same time, the driving force of the transport body applied to the plywood veneer is maintained in a slip state by the rear suction mechanism, and then this suction movement is released by the downward movement of the detachment actuating body. The topmost veneer veneer, which is driven by the driving force of the conveyor, is conveyed to the next process. Even if the second or subsequent veneer veneers are simultaneously suctioned, the slightly curved suction and holding will be done in a sensible manner.
Furthermore, due to the vibrations generated as the detachment actuator moves downward, the second and subsequent veneer veneers are separated and dropped onto the pile, and furthermore, the second and subsequent veneers are separated from the top veneer. Engages with the veneer in a complex manner,
Even if they are still in the air, the suction mechanism located at the upper limit sucks and holds the second and subsequent veneers in their current position, thereby reliably preventing two veneers from being conveyed at the same time and sending them to the dryer. Automation of post-processing such as delivery of veneer and construction of plywood veneers,
This ensures labor savings, etc.

Furthermore, on the plywood veneer placed on the lifting platform,
If excessive conduit grooves, knotholes, fissures, crevices, etc. are scattered, or if the veneer veneers are lightly adhered to each other during deposition, the injection mechanism is placed near the suction mechanism so that it can be moved up and down. However, the effects of the present invention can be more reliably exerted by injecting air with the injection mechanism immediately before adsorption to increase the interlayer separation from the second and subsequent veneer veneers.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway side view of the same, Fig. 3 is a view taken along the line A-A in Fig. 2, and Figs. D is an explanatory diagram of the operation. 1...lifting platform, 2...veneer veneer, 4...machine frame, 5...
Suction duct, 7... Suction device, 9... Frame, 12... Transport body, 13... Suction mechanism, 15... Suction box, 21... Dropping bar, 22... Separation actuating body, 23... Injection mechanism, 26... Injection box.

Claims (1)

[Scope of Claims] 1. Horizontally suctioning the vicinity of the center of the veneer veneer stacked on the lifting table across its width, and raising it to a suction position with a conveyor waiting at an upper front position; By once holding the veneer veneer separately by suction, the driving force of the transport body applied only to the front part of the veneer veneer becomes a slip state, and then the detachment actuator is lowered near the center of the veneer veneer to cause an impact. By applying force and maintaining the suction force applied to the front part of the veneer veneer, the suction force near the center is instantly released, allowing the second and subsequent veneer veneers to separate and fall, and the front part to hold them. A method for separating and supplying veneer veneers, characterized in that the driving force of a conveying body is driven by the topmost veneer veneer, and the veneer veneers are conveyed forward. 2. Air is injected near the center of the veneer veneers stacked on the lifting platform, and while increasing the interlayer separation from the second and subsequent veneer veneers, the area near the center is horizontally moved in the width direction. adsorbs and raises it to a suction device having a conveyor waiting at an upper front position,
By once holding the veneer veneer by suction, the driving force of the transport body applied to the veneer veneer is put into a slip state, and then the detachment actuator is lowered to the vicinity of the center of the veneer veneer to apply an impact force to the center of the veneer veneer. A method for separating and supplying veneer veneers, which is characterized by instantaneously releasing the adsorption force to nearby veneer veneers and transporting the veneer veneers forward, driven by the driving force of a conveyor. 3. A suction device is fixedly placed at an appropriate position above the front of the pile of plywood veneers placed on a lifting platform, and a plurality of suction devices are installed between a pair of rollers supported on both sides of the suction device in the conveying direction. A suction mechanism is installed adjacent to the rear of the conveyor in the conveyance direction, and the upper limit position is above the lower surface of the conveyor. The suction mechanism is arranged so as to be movable up and down approximately at the center of the pile of plywood veneers, and the suction mechanism includes a detachment actuator whose lower limit position is the same as or slightly below the lower surface of the conveyor, and which can be moved up and down. A veneer veneer separation and supply device characterized by the fact that it can be installed freely. 4. A suction device is fixedly placed at an appropriate position above the front of the pile of plywood veneers placed on a lifting platform, and a plurality of suction devices are installed between a pair of rollers supported on both sides of the suction device in the conveying direction. A suction mechanism is installed adjacent to the rear of the conveyor in the conveyance direction, and the upper limit position is above the lower surface of the conveyor. The suction mechanism is arranged so as to be movable up and down with respect to the pile of plywood veneers, and the suction mechanism is also provided with a detachment actuator whose lower limit position is the same as or slightly below the lower surface of the conveyor body so as to be movable up and down. Further, an apparatus for separating and supplying veneer veneers, characterized in that an injection mechanism is disposed near the suction mechanism so as to be movable up and down with respect to the pile of veneer veneers.