JPH0259041B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous processing method for sized veneers dried by a roll dryer.

(Prior art) The sized veneers that have been dried by conventional roll dryers and carried out in the direction of their fibers are once loaded in their entirety and then transported to the next process, the horizontal cutting machine, and then transported to the machine by workers. Insert the veneers one by one, cut and remove the front and rear edges or defective parts of the veneers, stick the front and rear ends of each veneer, and connect them using adhesive, adhesive thread, tape, etc. Then, a horizontal veneer was obtained by cutting it to a certain size.
By the way, dried sized veneers are easily touched by human hands when they are loaded, transported to the next process, or inserted into a flattening device, and are therefore easily damaged.

Also, since it is inserted into the horizontal bar by the worker,
The filling effect of the device is poor, and even in high-speed horizontal elongate devices, the productivity is low. For this reason, a large number of horizontal and vertical machines are required, and the space within the factory must also be increased. Furthermore, a large amount of manpower was required for loading the products after the dryer, transporting them to the next process, and working with the flattening equipment.

In a roll dryer, a large number of sized veneers are inserted and dried in succession, so the drying condition of each sized veneer varies depending on the wood species, and the finished moisture content may exceed the specified moisture content. Items were re-dried by natural drying or forced drying. In this case, a worker must remove the sized veneer before inserting it into the cross-cutting device, which causes a reduction in the filling efficiency of the horizontal stripping device.
In order to improve this filling efficiency, a method has also been proposed in which a roll dryer is provided downstream of the roll dryer, and the dryer and the roll dryer are connected by a conveyor or other conveyance device to perform continuous processing.

In this method, a moisture content detector is installed in the conveying device upstream of the horizontal veneer, and the moisture content of each sized veneer is detected before insertion, and if the finished moisture content exceeds the specified moisture content, a lamp etc. After marking is done on the veneer, the worker removes it based on the marking before inserting the sizing device. However, such manual filling of the horizontal stripping device is inefficient and leaves problems with low productivity.

The purpose of the present invention is to solve the problems of the conventional method of processing sized veneers of this type as described above.
In other words, the present invention eliminates the need for workers to remove sized veneers with a moisture content higher than a specified level before inserting them into a horizontal cutting device, as in the past.
This method involves finishing a sized veneer that has been dried in a roll dryer and reducing the entire amount regardless of the moisture content. Then, depending on the moisture content of the sized veneers that make up the horizontal veneer, the width of the cutting width is changed depending on the moisture content of the veneer. It was designed so that it could be collected at a later date. By having such a configuration,
The present invention aims to streamline the processing of sized veneers after drying and improve productivity, and at the same time, by sorting and stacking the horizontal veneers at the same position with the edges slightly shifted, the stacking device 5 You only need one, and the space is small. It was planned as such.

Embodiments of the present invention will be described below based on the drawings.

1 is a roll dryer which cuts raw wood and dries the resulting green veneer while conveying it in the direction of the fibers of the veneer.

2 receives a sized veneer that has been dried and discharged from the roll dryer 1 and is conveyed in the fiber direction,
This is a belt conveyor that conveys the veneer in a direction perpendicular to its fiber direction.

33 is a horizontal belt conveyor 2
The veneer is transported in a direction perpendicular to the fiber direction of the sized veneer. After cutting and removing the front and rear edges or defective parts of the sized veneer, the front and rear edges are butted together and the sized veneer is made using a conventional method such as adhesive, adhesive paper, adhesive thread or tape. Connect to obtain a horizontal veneer.

Reference numeral 4 denotes a carry-out conveyor for carrying out the connected horizontally cut veneers.

5 is a stacking device for stacking the cut horizontal rectangular veneers, and the horizontal rectangular veneers within the specified moisture content range,
Horizontal veneers with a moisture content higher than the specified moisture content, including areas with high moisture content, are sorted and stacked at the same stacking position.

Reference numeral 6 denotes a moisture content detector, which is located behind the horizontal veneer device 3, detects the moisture content of the connected veneer veneer during constant speed conveyance time T (Fig. 4), and detects the moisture content according to the detected moisture content. and is configured to emit an output signal.

7 is a cutting and loading control computer;
After receiving the output signal from the moisture content detector 6, it is determined whether the detected moisture content during the constant speed conveyance time T is within the specified moisture content range or higher than the specified moisture content compared to the preset moisture content. The cutting length of the cutting device 9 is switched depending on whether the cutting device 9 has a section or not.

A cutting command device 8 receives a signal from the cutting and stacking control computer 7, detects the front edge of the conveyed and connected horizontal veneer veneer, and sends an activation signal for an appropriate cutting width to the cutting device 9. A cutting device 9 receives a signal from the cutting command device 8 and cuts the connected horizontal veneer veneer.

10 is a loading conveyor, 11 is a loading platform,
12 is a position sliding command device, and 13 is a position sliding device. These effects will be discussed later when explaining FIG.

Next, the operation of the method of the present invention will be explained step by step.

(Explanation of operation) A raw wood veneer obtained by cutting raw wood is transported and inserted into the roll dryer 1 in the direction of its fibers by a worker or a device such as an auto feeder.
dried. The dried sized veneer is discharged from a roll dryer 1. Then, it is inserted and conveyed to a belt conveyor 2 provided in front of the outlet of the dryer 1. Then, it is carried into the flattening device 3 while the money is being collected.

In the flattening device 3, regardless of the finished moisture content that varies depending on the wood species and material of the sized veneer, the entire amount is brought in, the front and rear edges and defective parts are cut and removed, and the front and rear edges are butted together. The sized veneers are connected using a conventional method such as adhesive or tape to form a connected horizontal veneer.

While the connected horizontal veneer veneers are conveyed by the carry-out conveyor 4 provided at the rear of the lateral veneer 3, the moisture content detector 6 detects a constant conveyance speed T (the first speed) of the connected horizontal veneers. Detect the moisture content of the veneer (Figure 6). An output signal indicating whether this moisture content is within a specified moisture content range or higher than a specified moisture content compared to a preset moisture content is inputted to the cutting and bulking control computer 7.

The cutting and stacking control computer 7 receives the signal from the moisture content detector 6 and determines whether the length to be cut by the cutting device 9 of the connected cross-splitting veneer is to be l+α or l.

As shown in FIG. 4, the moisture content detector 6 determines the cutting length depending on whether the time (t ₁ + t ₂ ) exceeding the specified moisture content α exceeds the set time t during the constant speed conveyance time T. Determine.

That is, if the setting time is t, when t/T<t ₁ +t ₂ /T, the cutting length is l+α, and when t/T>t ₁ +t ₂ /T, the cutting length is l. .

While the moisture content of the articulated side-splitting veneer is detected,
It is transported, and its leading end reaches the cutting command device 8. Then, the cutting command device 8 sends a signal indicating that the leading edge of the veneer has arrived to the computer 7. Since the computer 7 stores the moisture content detection result, it sends a command to the cutting device 9 to cut the cutting length to l+α or l. In this way, the articulated cross-seam veneer is cut to length l or l+α.
In this case, for example, when cutting to a length l, the cutting is performed at the same time as the leading edge of the jointed horizontal veneer reaches the cutting command device 8, and when cutting to length l+α, the leading edge of the jointed veneer is cut at the same time as the cutting command device 8. It is sufficient to cut the command device 8 when it has gone too far by the length α. As shown in FIG. 5, the computer 7 is programmed to calculate the next moisture content detection start time _P3 from the constant speed conveyance time T when cutting to length l+α.
It is stored so that the time point _P3 is delayed by a certain amount. However, when cutting to length l, as shown in Figure 5, the moisture content of the preceding veneer unit starts to be detected.
Moisture content detection may be started at time points P ₂ and P ₄ when constant speed conveyance time T has elapsed from P ₁ and P ₃ .

The cut cross-seam veneers are carried into a stacking device 5 by a carry-out conveyor 4 and a stacking conveyor 10.

In the stacking device 5, receiving a command from the cutting and stacking control computer 7, the side-splitting veneer of length l and the side-splitting veneer of length l+α are placed at the same stacking position, but the horizontal-splitting veneer is The items are sorted and stacked by sliding them slightly in the direction of conveyance.

The sorting and stacking of horizontally spliced veneers having lengths l and l+α is carried out as follows.

That is, as shown in FIG. 6, (in FIG. 6, the veneers with lengths l, l+α are indicated as l+α, l). When this occurs, the position sliding command device 12 operates the position sliding device 13,
For example, a side-splitting veneer of length l+α is sucked and conveyed to the lower end side by a distance α, and then released.

On the other hand, when the side-splitting veneer of length l reaches the stacking conveyor 10, the position sliding command device 12 is not activated and it falls directly below the stacking conveyor 10.

In this way, the horizontally spun veneers with lengths l and l+α are piled up after being slid by length α as shown in FIG.

The command from the position sliding command device 12 is sent to the cutting device 9.
cuts the connected cross-splitting veneer to length l or l+α, and when the cross-splitting veneer of length l+α reaches the stacking conveyor 10, the cutting and stacking is performed so that the position sliding device 13 is operated. It is stored in the control computer 7.

When loading horizontally spliced veneers with lengths l and l+α,
Both may be rubbed in a direction perpendicular to the conveyance direction.
In this case, the position sliding device 13 may be arranged perpendicular to the stacking conveyor 10.

In a multistage roll dryer, each stage of the dryer or a set of multiple stages may be provided with a continuous line as described above for each set.

(Effects of the present invention) Since the dried sized veneer is processed in a continuous line, the number of workers can be reduced, and there is less manual contact, and the sized veneer is not damaged and the yield rate is improved. .

Since the entire amount of dried sized veneers is horizontally sized without removing insufficiently dried sized veneers in advance as in the conventional method, the filling efficiency of the sizing device is improved and productivity is improved. In addition, since the filling efficiency of the horizontal stripping device is high, only one device is needed, allowing for a wider use of factory space.

Horizontal veneers, including sized veneers with high moisture content, are cut into long lengths, i.e., l+α, to account for shrinkage due to re-drying, so it is not necessary to discard sized veneers with high moisture content as in the past. This improves the yield.

When stacking in the stacking device 5, the lengths l, l+
Since the side-splitting veneers of α are stacked in the same position but by sliding, only one stacking device 5 is required, and the space is small. Further, when re-drying, the sized veneers with lengths l and l+α can be distinguished at a glance.

[Brief explanation of the drawing]

FIG. 1: A plan view of an apparatus for carrying out the method of the present invention,
Figure 2: Side view as well, Figure 3: Side view of loading device, Figure 4: Explanatory diagram of moisture content detection method, Figure 5
Figure: An explanatory diagram at the start of moisture content detection. Figure 6: An explanatory diagram of the sliding action of the stacking position of horizontally spliced veneers. 1: Roll dryer, 2: Incoming belt conveyor, 3: Side stripping device, 4: Outgoing conveyor,
5: Loading device, 6: Moisture content detector, 7: Cutting and loading control computer, 8: Cutting command device, 9: Cutting device, 10: Loading conveyor, 11: Loading table, 12: Position sliding Command device, 13: Position sliding device, T: Constant speed conveyance time, α: Specified moisture content,
P ₁ , P ₂ , P ₃ , P ₄ : Moisture content detection start point, l+
A veneer with a length of α:l+α (Fig. 6), a veneer with a length of l:l (Fig. 6).

Claims (1)

[Scope of Claims] 1. A sized veneer that is dried by a roll dryer and carried out almost in the direction of the fibers of the sized veneer is transported in a direction perpendicular to the fiber direction of the sized veneer at a position in front of the exit. The entire volume of each sized veneer that is continuously conveyed is treated as
After that, edges and defective parts are sequentially removed to form horizontally connected horizontally horizontal veneers, and the moisture content of the connected horizontally horizontal veneers during constant speed conveyance time T is detected. Only when the detected moisture content is within the specified moisture content range, the connected horizontal rectangular veneer is cut to a standard cutting width l, and if the detected moisture content has a high moisture content area that is higher than the specified moisture content, then it is connected. The horizontally oblong veneer thus obtained is cut into lengths (l+α) that are longer by an appropriate dimension than the standard cutting width l, and the thus cut horizontally oblong veneer is transported to produce horizontal oblong veneers with a standard cutting width l. A process for sizing veneers characterized by sorting and stacking horizontal veneers cut to a length (l+α) that is an appropriate dimension longer than the standard cutting width and at the same position with their edges slightly shifted. Method. 2. In the same loading device, horizontal veneer with a standard cutting width l,
The length (l+
2. The method for processing sized veneers according to claim 1, wherein the veneers cut in width α) are sorted and stacked at the same position with their edges slightly shifted in the conveying direction. 3 In the same stacking device, cross-split veneers with a standard cutting width l and a length (l) that is longer than the standard cutting width l
2. A method for processing sized veneers according to claim 1, wherein horizontally spliced veneers cut into +α) are sorted and stacked at the same position by slightly rubbing their edges in a direction perpendicular to the conveying direction.