JPH0237283B2 - BENYATANBANNOBUNRIKYOKYUHOHOOYOBISONOSOCHI - 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 object of the present invention is to provide a method for reliably separating the uppermost one 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 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 resin of the wood, the negative pressure generated between the veneers may also cause the veneer veneer itself to become moderately 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.

Regarding the above description, conventionally, for example, JP-A-51
As disclosed in Japanese Patent No. 95357, a roller conveyor is provided with a head whose bottom part is approximately the same size at the top of the veneer veneer stacking section, and conveys the veneer veneer to the next process within this head; Two telescoping pipes are placed between the roller conveyors, a suction pipe is connected to the tip of each pipe via a joint, the telescoping pipes are lowered, and the veneer veneer is sucked up by the suction pipe. If two or more veneers are simultaneously suctioned by curving the joint part inward or outward using the joint as a fulcrum, this curving may cause a "slip" in the close contact between the first and second veneers. The close contact state is released, and as the telescopic pipe rises, the entire upper surface of the veneer is sucked into the roller conveyor in the head, and is supplied to the next process.

However, the veneer rises while being sucked and supported only by the suction part of the small hole formed by the pair of suction pipes until it reaches the position at the bottom of the head where it is supplied to the next process, and at that point it performs a bending operation. The attempt is made to closely separate the veneers following the first veneer, which has an adverse effect on suction and holding of the veneers, causing the inconvenience that the first veneer may fall at that point.

Furthermore, Japanese Patent Laid-Open No. 53-133864 discloses that a separating roller with a large coefficient of friction facing inward is rotated in pressure contact with the side edge of a thin wooden board on a mounting table. A mechanism is disclosed in which a thin wooden board at the top is curved and held by suction to a suction cup disposed at the top.

However, the thin wood boards curved using this method are usually extremely thin boards of around 0.2 mm, which are called veneer boards and are pasted onto the baseboard.
For example, if the thickness exceeds 1 mm, such as the veneer that makes up this base plate,
The veneer itself is stiff, and it is not possible to reliably separate the second and subsequent veneer veneers by pressing and rotating the separation roller.

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, separate suction mechanisms that give buoyancy force to the veneer veneer can be raised and lowered in the front and back of the veneer, and the three vacuum suction mechanisms move the front half of the veneer veneer slightly in a curved manner. The driving force of the transport body applied to the veneer veneer is restrained to create a slip state, and then the regulation plate covering the bottom of the front suction mechanism and the release actuator of the rear suction mechanism are By lowering the veneer, the driving force of the conveying body is passively applied to the veneer veneer and is supplied forward.Next, the method of the present invention and the apparatus for directly carrying out the method will be described as an embodiment shown in the attached drawings. Based on this, we will first explain its configuration.

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 vacuum generator (not shown) is installed at the top of a machine frame 4 installed at an appropriate position above the first half of the pile pile 3.
A suction duct 5 connected to the suction duct 5 is attached, and a plurality of pairs of notches 6 are bored at a constant interval in the bottom open end of the suction duct 5, thereby forming a suction device 7.

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, a conveying body 12 consisting of a plurality of belts 11 is installed, passing through the gap between the notches 6 of the suction device 7. The belt 1 is narrow or perforated so as not to reduce the suction force of the suction device 7 against the veneer veneer 2.

A front suction mechanism 13 having the following configuration is arranged at the front of the carrier 12. This front suction mechanism 13 consists of a front suction box 15 whose upper part is connected to a vacuum generator (not shown) via a flexible telescoping duct 14.
The tips of the piston rods 17 of a pair of fluid cylinders 16, which are pivotally supported by It is placed above the lower surface of the carrier 12, and can be raised and lowered onto the pile 3 of the veneer veneer 2 by the operation of the fluid cylinder 16.

Furthermore, a small fluid cylinder 19 with a small operating stroke is pivotally supported at the lower end of the bracket 18 attached to both sides of the front suction box 15, and the front suction box 15 is attached to the tip of the piston rod 20. 15
A regulating plate 21 covering the bottom opening of is locked.

This regulation plate 21 has a plurality of holes or slit-shaped openings 22 to appropriately regulate the vacuum suction force of the front suction box 15, and under normal conditions is in close contact with the bottom of the front suction box 15. , and its lower limit position is the same as or slightly above the lower surface of the conveyor 12, so that the conveyance reference plane of the veneer veneer 2 is aligned.

Further, a rear suction mechanism 23 having the following configuration is arranged at the rear of the carrier. This rear suction mechanism 23 is composed of a rear suction box 25 whose upper part is connected to a vacuum generator (not shown) via a flexible telescoping duct 24.
The tips of the piston rods 27 of a pair of fluid cylinders 26, which are pivotally supported by It is placed above the lower surface of the carrier 12, and is movable up and down above the pile 3 of the veneer veneer 2 by the operation of a fluid cylinder 26.

Furthermore, a small fluid cylinder 29 with a small operating stroke is pivotally supported at the lower end of a bracket 28 attached to both sides of the rear suction box 25, and a piston rod 30 is attached to the tip of the piston rod 30. 25
A rectangular knock-off bar 31 is locked on the outer circumference of the four circumferential sides, and constitutes a detachment actuating body 32.

The lower limit position of this knock-off bar 31 is the same as the lower surface of the carrier 12, or is slightly lower,
Further, in a normal state, it is located at the same level as the lower surface of the rear suction box 25, or slightly above it.

In particular, depending on the properties of the supplied veneer veneer 2, as shown in FIG.
The veneer veneer 2' is disposed near the outside of the veneer 2' to separate the layers from the second and subsequent veneer veneers 2' during suction.

That is, this injection mechanism 33 includes a fluid cylinder 34 pivoted to the machine frame 4 near the front and rear suction mechanisms 13, 23, and a piston rod 35 with a slit, nozzle, etc. drilled in its lower surface. The upper limit position is maintained higher than the lower surface of the front and rear suction boxes 15 and 25, and a flexible telescoping box 36 is connected to the spray box 36 installed in the spray box 36, and its upper limit position is maintained above the lower surface of the front and rear suction boxes 15, 25. It is connected to a jet generator (not shown) via a duct 37. An elastic body 38 made of rubber or the like is attached to the bottom of the injection box 36, if necessary, to prevent leakage of the injection air.

In addition, 39 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, the upper surface of the pile 3 of the veneer veneer 2 is set to a constant reference plane by the operation of the lifting platform 1, and the suction device 7 and the front and rear suction mechanisms 13 and 23 are kept in the suction state at all times, and the conveyor 12 is Each is kept in a constant driving state and placed on standby 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 lowers the front suction box 15 to the front end above the pile 3 of the veneer veneer 2. At the same time, the flexible duct 24 is extended by the operation of the fluid cylinder 26 via the piston rod 27, and the rear suction box 25 is lowered to an upper hollow position close to the pile 3 of the veneer veneer 2 (the first (See Figure 4 A).

When the regulating plate 21 that is in close contact with the bottom opening of the front suction box 15 horizontally abuts the topmost veneer veneer 2, the front end of the veneer veneer 2 is limitedly suctioned through the opening 22. , then the fluid cylinder 16 operates in reverse to raise the front suction box 15,
Plywood veneer 2 rising while being held in a suction state
The vicinity of the center thereof is also attracted to the rear suction box 25. At this point, the fluid cylinder 26 also performs suction operation in synchronization, and the front and rear suction boxes 15, 25
simultaneously rise, and at a position close to the upper limit, the veneer veneer 2 is also attracted to the suction device 7 located in the middle, and reaches each upper limit position. This upper limit position is preferably set above the front suction box 15 relative to the rear suction box 25, as shown in FIG. 4B.

For this reason, the front half of the veneer veneer 2 is slightly curved and suctioned separately by the front suction box 15, the suction device 7, and the rear suction box 25, and the front part of the veneer veneer 2 is The belt 11 of the conveyor 12 is interposed on the upper surface of the conveyor 12 in a driving state, but its driving force is restrained by the front and rear suction boxes 15 and 25 to create a slip state.

After that, when the small fluid cylinders 19 and 29 are operated to extend each piston rod 20 and 30, the regulating plate 21 that is in close contact with the bottom opening of the front suction box 15 and the four circumferences of the rear suction box 25 are The rectangular knock-off bar 31 located on the outside is
Since the veneer veneer 2 descends together, the veneer veneer 2 remains engaged with the regulating plate 21 at its front end and descends while being released from suction to the conveyance reference surface, and at the same time,
The drop bar 31 descends near the center and applies an impact, instantly releasing the suction state.

For this reason, the veneer veneer 2 is attracted only by the suction device 7 at the front and is continuously conveyed to the guide roll 39 while being passively driven by the belt 11 of the conveyor 12 (see Fig. 4C). ), after the actuation, the regulating plate 21 and the knock-down bar 31 immediately return to their original positions by the reverse actuation of the fluid cylinders 19 and 29.

At this time, if the uppermost veneer veneer 2 is in an excessively wet state, or if the second or lower veneer veneer in the stack 3 is affected by negative pressure that occurs through the conduit groove and during adsorption, Plate 2' is the front suction box 1
Even in the process of simultaneous adsorption to the rear suction box 25, and then gradual adsorption to the rear suction box 25, and even partial curved adsorption, even if they are simultaneously adsorbed, the impact movement of the detachment actuator 32 Due to the generated vibrations, the second and subsequent veneer veneers 2' are separated and dropped onto the pile 3, and only the uppermost 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 topmost veneer veneer 2 while being conveyed by the conveyor 12, and fall onto the pile 3. If the uppermost veneer veneer 2 is not transported and remains in a hollow state, the front and rear suction boxes 15, which are at the upper limit position, are
25, the second and subsequent veneer veneers 2' are suctioned and held, and simultaneous conveyance of two veneers is reliably prevented.

In addition, conduit grooves, knot holes, fissures, cracks, etc. are noticeably scattered in the stacked pile 3 of the veneer veneers 2 placed on the lifting platform 1, and furthermore, during the stacking, the gaps between the veneers 2 are If there is light adhesion, the injection mechanism 33 is also used.

That is, as shown in FIG. 5, the fluid cylinder 34 is moved in advance near the suction point of the plywood veneer 2, and the ejection box 36 is moved by the elongation movement of the piston rod 35.
is lowered 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, and then the process described above is carried out.

In this embodiment, the elevating and lowering movements of the regulating plate 21 and the knock-off bar 31 are explained using small fluid cylinders 19 and 29 for convenience, but this may be replaced by a mechanical movement such as a cam mechanism or a crank mechanism. It is optional to do so.

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 fixedly disposed above. In addition, separate suction mechanisms that apply buoyancy force to the veneer veneer in stages can be raised and lowered in the front and rear directions, and the three vacuum suction mechanisms allow the front half of the veneer to be slightly curved and moved. While moving the plywood, it is selectively adsorbed and held, and the driving force of the transporting body applied to the veneer veneer is restrained to create a slip state.
After that, by lowering the regulating plate that covers the bottom of the front suction mechanism and the release actuator of the rear suction mechanism, the suction hold of each part is released, and the top part that receives the driving force of the transport body is released. veneer veneers to the next process, and due to the properties of the veneer veneers described above, even if the second or subsequent veneer veneers are simultaneously adsorbed, it is not possible to adsorb them in stages or separate them. Due to the slightly curved adsorption and holding mechanism, and the vibration generated as the detachment actuator moves downward, the second and subsequent veneers are separated and dropped onto the pile, and the second and subsequent veneers are separated and dropped again. Even if the top veneer veneer is still in a hollow position due to complicated engagement, after the top veneer veneer has been conveyed, the second and subsequent veneer veneers are removed by separate suction mechanisms located at the upper limit. can be held again by suction at the current position.

Therefore, as in the conventional example described above, when the second and subsequent veneers are closely separated by a bending action while being suctioned and supported only by the suction part of the small hole, the veneers are The first veneer may fall due to the negative effect on suction and holding, or the veneer itself is stiff, and the pressure rotation of the separation roller makes it difficult to separate the second and subsequent veneers. This eliminates inconveniences such as not being able to carry out the veneer, reliably prevents two sheets from being transported at the same time, and ensures automation and labor savings in post-processes such as transport to the dryer and the structure of the veneer veneer.

[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 line A-A in Fig. 2, and Figs. C is an action diagram, and FIG. 5 is an explanatory diagram showing another embodiment. 1...lifting platform, 2...veneer veneer, 4...machine frame, 5...
Suction duct, 7... Suction device, 9... Frame, 10, 1
0'...roller, 11...belt, 12...conveyor, 1
3... Front suction mechanism, 15... Front suction box, 21... Regulating plate, 22... Opening, 23... Rear suction mechanism, 25...
Rear suction box, 31... Dropping bar, 32... Separation actuating body, 33... Injection mechanism.

Claims (1)

[Claims] 1. The front end and the center of the veneer veneer stacked on the lifting table are suctioned in stages across the width by lowering of each suction mechanism, and the suction mechanism is placed in a standby position in the upper middle. By suctioning the veneer veneer to the upper limit with a suction device that has a conveying body, and then selectively holding the veneer veneer by suction while slightly curving the front half of the veneer, the driving force of the conveying body applied to the veneer veneer is restrained and the veneer slips. Then, the regulation plate located at the bottom of the suction mechanism at the front end and the release actuator located near the center are lowered to release the suction force at the front end and the center of the plywood veneer, and the transport body is A method for separating and supplying veneer veneers, which is characterized by transporting veneer veneers forward that receive driving force. 2. 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 conveyance body formed by suspending a conveyor belt is installed and maintained in a constantly driven state, and a front suction mechanism whose upper limit position is above the lower surface of the conveyance body is installed at the front of the conveyance body in the conveyance direction, A regulation plate is disposed so as to be movable up and down with respect to the stack of plywood veneers, and at the bottom of the front adsorption mechanism, a regulating plate whose lower limit position is the same as or slightly above the lower surface of the conveyor body is movable up and down. Additionally, a rear suction mechanism having an upper limit position above the lower surface of the conveyor body is disposed at the rear of the conveyor body in the conveyance direction so as to be movable up and down with respect to the pile of plywood veneers; A device for separating and supplying veneer veneers, characterized in that the rear suction mechanism is provided with a detachment actuator whose lower limit position is the same as or slightly below the lower surface of the conveying body and is movable up and down.