JP2656442B2 - Wood drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood drying apparatus which can uniformly dry a large number of wood veneers in a short time.

[0002]

2. Description of the Related Art A veneer immediately after being sawn or a decorative veneer immediately after a plurality of materials are adhered has an extremely high water content, and is used as it is as a material for manufacturing various articles. Drying is performed in advance because cracks and dimensional irregularities occur with the progress of drying.

A drying method for such a veneer is as follows.
It can be broadly classified into natural drying and forced drying. Natural drying is the most basic drying method performed by arranging a plurality of veneers vertically so that a gap is formed therebetween and arranging the veneers in a well-ventilated place out of direct sunlight. Since it is gradually dried, there is little deformation of the veneer, and it can be dried uniformly by taking time, so it is applied to applications where extreme dimensional irregularities must be avoided, but the drying time is long have.

[0004] Therefore, in order to shorten the drying time, forced drying performed under certain conditions is currently the mainstream. The forced drying can be classified into a drying chamber charging system, a hot plate dryer system, and a continuous veneer drying system.
First, in the drying room charging method, the inside is heated to a predetermined temperature,
In addition, a large number of veneers are placed in a drying chamber provided with a fan for making the internal temperature distribution uniform by mixing heated air,
Thereafter, the opening is closed, and the closed state is continued for a predetermined time to forcibly dry. There is also a configuration in which a large number of veneers are leaned on a trolley without touching each other, the trolley is pushed into a drying chamber, and the trolley is pulled out after the drying operation is completed.

Next, the hot plate drying method basically comprises a pair of single plate feed rollers and a heating plate provided downstream of the rollers, and a plurality of sets of these rollers and hot plates are connected in series. The drying is carried out by using an apparatus provided, and the veneers are sequentially fed between heating plates for heating by driving rollers and pressed and heated to perform drying sequentially. This method is useful when a large site cannot be secured due to the layout because the installation area of the device is small.

Further, in the continuous veneer drying method, the veneer is dried in a continuous strip shape, and the veneer wound on a reel is fed to a dryer while being rewound.
After drying, the dried veneer is sequentially cut to a predetermined length by a clipper to obtain a dried veneer. The machine is easy to operate because it is sent continuously only by the take-up operation, while the already cut single plate is sent to the dryer. Since it can be cut to the same length without the need, there is an advantage that the yield increases.

[0007]

The conventional drying chamber charging system is basically of a batch type, in which veneers are charged into the drying chamber and dried veneers are taken out of the drying chamber. There is a problem that a long time is required for the operation and the drying cost is increased. Furthermore, since the temperature distribution and the humidity distribution in the drying chamber are not always uniform, there is an inconvenience that the moisture value of the obtained dried veneer has a large variation.

In the hot plate drying method, the veneer is pressed and held by a pair of upper and lower hot plates. Therefore, when the veneer is dried without any trouble, the finish is smooth and convenient.
Since the partial deformation of the veneer is forcibly pressed and forced into a flat plate shape, there is a problem that cracks are easily generated and the defect rate is high. In addition, since each veneer is supplied to the dryer in series, there is a disadvantage that the drying ability is inferior.

Further, in the continuous veneer drying method, the continuous veneer feed mechanism is very complicated in order to prevent the continuous veneer from shrinking during drying and the tearing caused by contact with parts of the apparatus. As a result, there is a problem that the apparatus becomes expensive. In addition, there is the disadvantage that the equipment is very long, requiring an extremely large installation space. In addition, chemicals are applied to the veneer surface due to the chemical decoration, but this chemical may migrate to the veneer transfer roller or net, making maintenance and management of equipment difficult. In addition, there is a problem that maintenance costs increase.

The present invention has been made in order to solve the above problems, and has a large drying capacity, has no variation in drying conditions, and requires a small installation area for a large drying capacity. The purpose is to provide a wood drying device suitable for fully automatic operation.

[0011]

According to a first aspect of the present invention, there is provided a wood drying apparatus for continuously drying a veneer, comprising a ring-shaped traveling track. A plurality of trolleys are arranged so that they can be circulated on the top,
A plurality of partition members arranged in the moving direction of the truck are erected at the upper part of each truck, and a veneer receiving portion for placing the veneer in a substantially upright posture is formed between the respective partition members. A tunnel-shaped drying chamber is installed in a part of the upper part, and a veneer loading device for loading undried veneers into the veneer storage unit on the upstream side and the downstream side of the drying chamber, respectively, A veneer discharge device for taking out veneers from the veneer storage portion is provided, and each of the partition members is formed by a pair of uprights standing upright on both sides in the width direction of the bogie. Things.

According to a second aspect of the present invention, there is provided a wood drying apparatus according to the first aspect, wherein one or a plurality of sprockets are disposed along an inner edge of the traveling track. An endless chain is stretched on the endless chain, the bogie is connected to the endless chain, and the bogie is configured to move on a traveling track by circulating movement of the endless chain by rotational driving of a sprocket. is there.

According to a third aspect of the present invention, there is provided a wood drying apparatus according to the first or second aspect.
The standing body is formed by bending a rod-shaped body into an inverted shape.
Is formed by the inverted U-shaped member obtained as described above.

According to a fourth aspect of the present invention, in the timber drying apparatus according to the first, second or third aspect, at least one pair of optical sensors is provided at a reference position of the traveling track. The control means is configured to detect the presence or absence of a partition member of the moving carriage, and to transmit a veneer loading command signal to the veneer loading device when both optical sensors simultaneously detect the partition member. Is provided.

According to a fifth aspect of the present invention, there is provided a wood drying apparatus according to the first, second, third, or fourth aspect, wherein the inner wall surface of the drying chamber is supplied with heat for drying. Means are provided and a fan for circulating indoor air is provided.

[0016]

According to the wood drying apparatus of the first aspect,
By causing a plurality of trucks to travel on an annular traveling truck, each truck sequentially circulates between a veneer loading device, a drying chamber, and a veneer discharging device. And a plurality of partition members crossing in the vehicle width direction are erected on the trolley, and a veneer receiving portion for placing the veneer in a substantially upright posture is formed between the respective partition members. Upon reaching the veneer loading device, if veneers are sequentially loaded from the veneer loading device into the veneer accommodating section on the bogie, when the bogie passes through the device, the veneer is placed on the bogie. A large number of veneers are vertically arranged side by side, and a large number of undried veneers are loaded on the cart with a very small area.

The truck loaded with a large number of veneers is
Next, it is introduced into a drying chamber, and moves while being dried in the drying chamber. In this case, even if the temperature distribution in the drying chamber is uneven, since all veneers pass through the drying chamber, there is a difference in drying conditions between the veneers due to the uneven temperature distribution. Therefore, the variation in the moisture value between the veneers dried while moving through the drying chamber is very small.

Further, if the veneers are stored on the trolley so that the grain direction is up and down, the moisture is guided by the grain and the moisture drops from the veneers.
It contributes to shortening of the drying time.

The carriage carrying the dried veneer, which has left the drying chamber, then reaches the position where the veneer discharge device is provided, and is mounted in the accommodation space by the operation of the veneer discharge device. Each veneer is sequentially discharged from the bogie, and the bogie itself becomes empty and moves to the position of the veneer loading device again.

As described above, by mounting the undried veneer vertically in the veneer receiving section formed on the carriage, the processing capacity is remarkably increased, and the volume of the drying chamber is minimized. And the size of the drying device can be reduced. Further, since the partition member provided on the carriage for holding the veneer in the standing posture is formed by the standing bodies provided on both sides in the width direction of the carriage, a gap between the standing bodies is formed. It is possible to arrange, for example, a veneer scraping unit, which is a part of the veneer unloading device, so that a veneering action can be exerted on the central portion of the veneer. Emitted in a stable state. After the single veneer is discharged from the trolley, the veneer moves so that the veneer scraping means relatively passes between the pair of standing bodies, and corresponds to the next veneer.

Further, various sensors are installed at appropriate places to appropriately detect the moving state of the bogie on the traveling track, the state of supply of the veneer to the veneer loading device, and the like, and appropriately detect the condition based on the detected values. By providing a control means for transmitting a drive signal for driving each component of the plate loading device and the single plate discharging device, it is easy to automate the entire drying device, and by realizing the automation, the drying device The operation cost can be greatly reduced.

According to the wood drying apparatus of the second aspect, the endless chain is stretched over one or a plurality of sprockets arranged along the inner edge of the traveling truck, and the bogie is connected to the endless chain. Therefore, the bogie connected to the endless chain can be circulated on the traveling track by the rotation drive of the sprocket. And the moving speed of all the bogies can be easily controlled by adjusting the rotation speed of the sprocket, and the moving speed of the bogie synchronized with the operation of the veneer loading device and veneer discharging device is controlled. It can be easily performed.

According to the third aspect of the present invention, the upright body is formed by the inverted U-shaped member obtained by bending the bar into the inverted shape.
The erection member itself can be made at low cost, and a trolley that holds a plurality of veneers in an upright position by a simple operation of attaching the erection member to the upper surface of the trolley on both sides is completed, and the trolley is inexpensive. Can be something.

According to the fourth aspect of the present invention, at least one pair of optical sensors is provided at the reference position of the traveling truck, and the optical sensors detect the presence or absence of the partition member of the moving truck. When both optical sensors detect the partition member at the same time, a control means for transmitting a loading command signal to the veneer loading device is provided, so that the veneer receiving portion of the bogie is properly mounted on the veneer. The veneer loading device operates only when it is located in the loading device and supplies the veneer to the above-mentioned storage portion, for example, when there is no bogie, or when the connecting portion between one bogie and another bogie is single. Since the pair of optical sensors does not simultaneously detect the presence of the partition member when the vehicle arrives at the loading position of the plate loading device, a command signal for operating the single plate loading device is never transmitted from the control means. , Effectively prevent equipment malfunction It is possible.

According to the wood drying apparatus of the fifth aspect, a heating means for supplying heat for drying is provided on the inner wall surface of the drying chamber, and a fan for circulating indoor air is provided. Is provided, it is possible to equalize the temperature distribution in the drying chamber by driving the fan.

[0026]

FIG. 1 is a plan view showing an example of an apparatus for drying wood according to the present invention. As shown in this figure, a drying apparatus 1 of the present invention is an apparatus which is basically made of wood veneer P to be sequentially dried by sequentially supplying them. The veneer P targeted in the present invention may be a sawn board obtained by sawing wood, or a so-called plywood in which a thin sawing board or a winding board is laminated using an adhesive. The drying apparatus 1 according to the present invention includes an annular traveling truck 2, a plurality of trolleys 3 arranged on the traveling truck 2 so as to be able to circulate, and a tunnel-shaped truck installed on a part of the traveling truck 2. Drying chamber 4, a veneer loading device 5 that is provided upstream of the drying chamber 4 to load the undried veneer P <b> 1 onto the carriage 3, and a drying chamber 4 that is provided downstream of the drying chamber 4. It basically comprises a veneer discharge device 6 for taking out the dried veneer P2 from the carriage 3.

In this embodiment, the traveling truck 2
Has a flat elliptical shape in a plan view having portions parallel to each other. The traveling track 2 is formed by performing flooring construction on which an iron plate is laid, and has a flat floor surface.

An elliptical chain groove 21 having an open top is provided along the inner edge of the traveling track 2. A drive motor 21 a is provided on one inner side of the chain groove 21.
The sprocket 23 is provided so as to be rotatable around the vertical axis 21b via the belt 21c by the driving of the sprocket 23. Then, an endless chain 22 indicated by a two-dot chain line is fitted into the chain groove 21 while being hung on such a sprocket 23. Accordingly, when the drive motor 21a is driven, its rotation is transmitted to the sprocket 23 via the belt 21c, and the rotation of the sprocket 23 causes the endless chain 22 meshing with the sprocket 23 to rotate in the chain groove 2.
1 will be circulated.

In this embodiment, the sprocket 23 is provided only on one side of the chain groove 21 having an elliptical shape. However, the sprocket 23 is not limited to be provided only on one side, and is not limited thereto. The endless chain 22 may be provided on a pair of left and right sprockets, or when the shape of the traveling track in plan view is not an ellipse as shown in FIG. May be provided with sprockets at its four corners.

Then, a plurality of trucks 3 connected to the endless chain 22 exposed to the outside from the upper opening of the chain groove 21 via the connecting member 31 are provided on the traveling truck 2 configured as described above in a predetermined manner. They are arranged in series with an interval. Accordingly, when the endless chain 22 is circulated in the chain groove 21 by driving the drive motor 21a, the respective trolleys 3 also circulate on the traveling track 2 with this circulating movement. In the present embodiment, the endless chain 22 and the truck 3 connected thereto are set to circulate clockwise.

FIG. 2 is a perspective view showing an example of the truck. As shown in this figure, the bogie 3 has a bogie main body 3a having wheels 32 at four corners on the bottom surface, and stands upright on the upper part of the bogie main body 3a (in FIG. 2, the upper part is inclined leftward). And a large number of inverted U-shaped members (standing bodies) 33 provided. And a partition member 3b is formed by a pair of right and left inverted U-shaped members 33 provided on the bogie main body 3a in the vehicle width direction, and a single plate housing portion is provided between one partition member 3b and the partition member 3b adjacent thereto. 34 are formed. The veneer P is accommodated in the veneer accommodating portion 34 in the upright posture.

A valley 35 is formed in a gap between the rows of the right and left inverted U-shaped members 33 in the vehicle width direction. Therefore,
In a state where the veneer P is not stored in the veneer storage portion 34,
Even if various members are provided on the traveling track 2 at a portion corresponding to the valley portion 35, the carriage 3 can move through the members.

At one straight portion of the traveling truck 2 in which the carriage 3 is configured to be able to circulate, a drying chamber 4 in the form of a tunnel extending over the traveling truck 2 is provided. Steam pipes 41 having a large number of fins on the outer peripheral surface are arranged in multiple stages in the vertical direction on the left and right inner wall surfaces of the drying chamber 4, and drying is performed by supplying steam S to the steam pipes 41 from outside the system. The inside of the chamber 4 is heated.

A fan 42 is provided at an appropriate position in the drying chamber 4. By driving the fan 42, the heated air in the drying chamber 4 is mixed so that the temperature in the drying chamber 4 becomes uniform. It has been done.

The straight section facing the portion of the traveling truck 2 where the drying chamber 4 is provided,
Veneer charging device 5 is provided on the upstream side of
A veneer discharge device 6 is provided downstream of the drying chamber 4, that is, upstream of the veneer charging device 5.

FIG. 3 shows a veneer loading device 5 and a veneer discharging device 6.
FIG. 3 is a side view showing a state in which the front and rear are continuously connected on the traveling track 2. As shown in FIG.
Are four pillars 51 erected so as to straddle the traveling track 2, a veneer supply table 52 provided above these pillars 51, and a right side of the veneer supply table 52 shown in FIG. And a veneer supply mechanism 53 attached to the upper end.
The truck 3 on the traveling truck 2 is
2 and moves to the left in FIG. 2.

A plurality of rollers 52a are provided on the veneer supply table 52 so as to be rotatable around the axis in the width direction. A plurality of undried veneers P1 are stacked on the rollers 52a.
Are supplied from the roller table 5z shown in FIG. 1 and are on standby. The first vacuum gripping means 54 is provided so as to be located above the undried veneer P1 in the standby state.
The first vacuum gripping means 54 is provided with a suction cup at a lower portion, and operates a vacuum pump (not shown) to suck and hold the wet single veneer P1 with the suction cup and hold the wet single veneer P1. , And reciprocate as shown by the arrow in order to load it into the single plate supply mechanism 53.

The single plate supply mechanism 53 includes a horizontal shaft 5.
It comprises a chute 53b rotatable around 3a and a pair of upper and lower supply rollers 53c provided so as to cross the inside of the chute 53b in the width direction.
A cylinder 53d is provided on the column 51 corresponding to the lower surface of the chute 53b, and a cylinder rod of the cylinder 53d is connected to the chute 53b. Accordingly, by appropriately driving the cylinder 53d to move the cylinder rod in and out, the veneer supply mechanism 53 moves around the horizontal axis 53a between the veneer receiving standby posture shown by the two-dot chain line and the veneer discharge posture shown by the solid line. It will rotate.

The supply roller 53c rotates in opposite directions to each other with the undried veneer P1 sandwiched by the rotation of a drive motor (not shown), and rotates the undried veneer P1 on the discharge side of the veneer supply mechanism 53. It is forcibly sent out to.

Therefore, after operating the cylinder 53d to set the veneer feeding mechanism 53 to the veneer receiving position described above, the first vacuum gripping means 54 sucks and holds the undried veneer P1 and supplies it to the chute 53b. Upper and lower supply rollers 53c
The supply roller 53c is then driven by releasing the suction grip of the undried veneer P1 and driving the supply roller 53c.
The undried veneer P1 is moved by the chute 53
b, and is in a state of being mounted on the veneer supply mechanism 53.

On the other hand, between the support 51 of the veneer loading device 5 and the support 61 of the veneer discharge device 6, a beam R is bridged in the horizontal direction. Optical sensor 71
Is attached. The optical sensor 71 emits light toward the inverted U-shaped member 33 of the truck 3 moving on the traveling track 2 and receives the reflected light that has been reflected on the inverted U-shaped member 33. It is configured such that when light is received, the presence of the inverted U-shaped member 33 is detected.

The distance between the left and right optical sensors 71 is determined by the inverted U-shaped member 3 adjacent to each other in the traveling direction of the carriage 3.
3 and 33, that is, the width of the veneer housing 34, and a pair of optical sensors 7
1 simultaneously detects the presence of the inverted U-shaped member 33, and the veneer accommodating portion 34 is in the veneer discharge position.
The position is set so as to face the discharge port.

Therefore, when the pair of optical sensors 71 simultaneously detect the presence of the inverted U-shaped member 33 constituting the partition member 3b in the trolley 3 that has entered the veneer supply table 52 from the upstream side, it is inevitable. A veneer container 34 that can receive the undried veneer P1 under the veneer supply mechanism 53;
Is in a standby state, and by driving the supply roller 53c of the veneer supply mechanism 53 in the veneer discharge position to which the veneer veneer P1 is attached in synchronization with this state, The board P1 is the veneer accommodation part 3 of the carriage 3
4 and housed.

In the present invention, there is provided a control means to which signals of detection results of the pair of left and right optical sensors 71, 71 are always inputted. If the optical sensors 71, 71 simultaneously detect the inverted U-shaped member 33 as a result of determining the signal from the control means, the single plate supply mechanism 53
An operation command signal for loading the undried veneer P1 into the veneer accommodating portion 34 is transmitted. Accordingly, the supply roller 53c of the veneer supply mechanism 53 that has received the command signal is driven to rotate, and the undried veneer P1 mounted in the veneer supply mechanism 53 is a single unit that is opposed to and stands by at the lower part. It will be automatically loaded into the plate accommodation part 34.

In this embodiment, the undried veneer P1 is sequentially and automatically supplied to the veneer supply mechanism 53 by causing the first vacuum gripping means 54 to suck and hold the undried veneer P1. In particular, the first vacuum holding means 5
The undried veneer P1 may be manually attached to the veneer supply mechanism 53 by a worker without providing the veneer 4.

The veneer discharge device 6 provided on the upstream side of the veneer loading device 5 configured as described above includes four supporting columns 61 disposed so as to straddle the traveling track 2 and And a veneer discharge mechanism 63 provided at the upper end on the upstream side (left side in FIG. 3) of the veneer reception table 62.

The veneer discharge mechanism 63 is provided to be suspended from the veneer receiving table 62 so as to pass through the valley portion 35 formed between the rows of the inverted U-shaped members 33 of the advancing bogie 3. Veneer scraping means 64;
And a roller mechanism 65 having a pair of upper and lower rollers 65a disposed at the top of the roller. The veneer scraping means 64 is composed of two chains that are stretched in parallel between the upper and lower sprockets as shown by a two-dot chain line in FIG. 2 and a scraping piece that is provided on these two chains. The chain is configured to circulate between upper and lower sprockets by a rotational drive of a drive motor (not shown).

Accordingly, the dried veneer P2 accommodated in the veneer accommodating portion 34 due to the advance of the carriage 3 is lifted by the veneer scraping means 6
When it comes into contact with the roller 4, it is caught by the scraping pieces of the single-plate scraping means 64, pushed upward with the rotation of the chain, and sandwiched between a pair of rollers 65a provided in the roller mechanism 65. become. Therefore, if the pair of rollers 65a is rotated in opposite directions about the axis by driving a drive motor (not shown), the dried veneer P2 sandwiched between them is lifted upward, and the tip ends. It bends to be in a state of being positioned on the veneer receiving table 62.

The roller mechanism 65 is connected to a horizontal shaft 65.
It is pivotally supported so as to be rotatable around b, and can be rotated forward and backward within the range from the inclined posture shown by the solid line to the horizontal posture shown by the two-dot chain line by the operation of the cylinder 65c attached to the column 61. ing. Therefore, if the roller mechanism 65 is set in the horizontal posture by operating the cylinder 65c in a state where the dried veneer P2 is completely removed from the veneer accommodating portion 34 of the cart 3, the dried veneer P2 is It is released from the mechanism 65 and placed on the single-plate receiving table 62.

At the upper part of the single-plate discharge device 6 thus configured, a second vacuum gripping means 66 similar to the first vacuum gripping means 54 is provided. Then, the single-plate receiving table 62
By operating the second vacuum gripping means 66 in a state where a considerable number of the dried veneers P2 are stacked on the dried veneer P2, the dried veneer P2 is sucked and gripped, and is placed on the unloading means reaching the next step. It has become. In the present embodiment, the dried veneer P discharged to the veneer receiving table 62 as described above is used.
2 is transferred to the next step by the second vacuum gripping means 66. However, in the present invention, such installation of the second vacuum gripping means 66 is not essential, and the second vacuum gripping means 66 is placed on the single-plate receiving table 62. The dried veneer P2 may be carried out to the next process by a worker manually.

FIG. 4 is a block diagram illustrating a control system of the wood drying apparatus configured as described above. Hereinafter, the operation of the present invention will be described based on this block diagram. First, as shown in FIG. 4, in the control system according to the present invention, control means 8 using a microcomputer is provided. And all the operation control of the drying apparatus 1 is performed through this control means 8.

That is, a program relating to the operation control of the drying apparatus 1 is previously input into the control means 8, and after the initial setting is performed by the operator, the signals from various sensors provided at various places are provided. The determination and the calculation by the above-mentioned program are executed based on the detected value relating to the driving condition, and an appropriate drive command signal is transmitted to the controlled object.

More specifically, a drive motor 21a for circulating the endless chain 22 as a controlled object,
The first vacuum gripping means 54 for supplying the undried veneer P1 on the veneer 2 to the veneer supply mechanism 53, and the veneer supply mechanism for loading the mounted undried veneer P1 into the veneer accommodating portion 34 on the carriage 3. 53, a veneer discharge mechanism 63 for discharging the dried veneer P2 on the trolley 3 onto the veneer receiving table 62, and a second mechanism for moving the dried veneer P2 discharged onto the veneer receiving table 62 out of the system. Vacuum holding means 66,
A control valve 43 for controlling the flow rate of steam supplied to the drying chamber 4 is selected.

The various sensors include a rotation speed sensor 72 for detecting the rotation speed of the drive motor 21a.
An undried veneer detection sensor 73 for detecting the presence / absence of the undried veneer P1 on the veneer receiving table 62, the veneer accommodation portion 34 of the carriage 3
Is located at the loading position of the undried veneer P1, the optical sensor 71 described in detail above, and the dried veneer detection sensor 74 for detecting the presence or absence of the dried veneer P2 on the veneer receiving table 62. ,
A temperature sensor 75 for detecting the temperature in the drying chamber 4 is provided.

Further, the control means 8 is provided with an input device 81 for setting an initial value relating to the operation of the drying device 1, from which the circulation speed of the endless chain 22 and the temperature in the drying chamber 4 are inputted. It is supposed to be. The circulation speed can be set within a range of 0 to 220 mm / min, and the temperature in the drying chamber 4 is 40 to 130 ° C.
Can be set within the range. Usually, the circulation speed is set to about 35 mm / min and the temperature is set to about 50 ° C. as standard values.

Accordingly, when the circulating speed of the endless chain 22 and the temperature in the connecting member 31 are input from the input device 81, and then the main switch for driving the drying device 1 is turned on, the rotating speed is adjusted to the circulating speed. The drive motor 21a is driven to rotate, and a predetermined number of the trolleys 3 circulate on the traveling track 2 in the direction of the thick arrow shown in FIG.

The rotational speed of the drive motor 21a detected from the rotational speed sensor 72 is constantly input to the control means 8, and the detected value is compared with the preset rotational speed (ie, the preset circulation of the endless chain 22). The speed of the endless chain 22 is constantly set to a predetermined speed because a command signal for correcting the speed is output to the drive motor 21a when the speed is out of the set value. .

After the carriage 3 is circulated on the traveling track 2 by driving the endless chain 22, the undried veneer is placed on the veneer supply table 52 of the veneer loading device 5 via the roller table 5z. Carry in P1 and then veneer table 5
The presence of the undried veneer P1 on the second unit 2 is detected, and the signal is input to the control unit 8, so that the control unit 8 which receives the signal transmits an operation command signal of the first vacuum gripping unit 54. The first vacuum gripping means 54 performs a motion of vacuum gripping the undried veneer P1 and mounting it on the veneer supply mechanism 53.

The undried veneer P1 is supplied to the veneer supply mechanism 5
3c is sandwiched between the supply rollers 53c,
Here, the interlock between the detection result of the optical sensor 71 and the veneer feeding mechanism 53 is performed only when the lower opening of the veneer feeding mechanism 53 is securely opposed to the veneer accommodating portion 34.
Is driven to feed the undried veneer P1 into the veneer storage unit 34.

More specifically, the detection result of the presence or absence of the inverted U-shaped member 33 by the pair of optical sensors 71, 71 is input to the control means 8, and based on the input result, both the optical sensors 71, 71 simultaneously detect the inverted U-shaped member. 33 is detected or not, and
Only when detected simultaneously, an operation command signal is transmitted to the veneer supply mechanism 53, and by operating the cylinder 53d, the veneer supply mechanism 53 presenting the veneer receiving posture is turned around the horizontal axis 53a so as to be in the discharge posture. The undried veneer P1 temporarily held by the pair of upper and lower supply rollers 53c, 53c is obliquely moved downward from the lower opening of the veneer supply mechanism 53 in order to rotate the supply roller 53c. , And is loaded into the veneer accommodation portion 34 of the truck 3 opposed thereto.

Therefore, for example, at the connecting portion between one bogie 3 and the other bogie 3 following it, the inverted U-shaped member 33 at the rear end of one bogie 3 and the foremost inverted U-shaped member of the other bogie 3 Since the interval between the optical sensor 71 and the member 33 is set to be wider than the interval at which the single plate accommodating portion 34 is formed, the pair of optical sensors 71 and 7 is used.
1 does not detect the inverted U-shaped member 33 at the same time, therefore, the operation command signal is not transmitted from the control means 8 to the veneer supply mechanism 53, and the undried veneer P1 is erroneously placed in the gap between the carts 3. Dropping is effectively prevented.

The undried veneers P1 sequentially loaded in the veneer accommodating section 34 of the carriage 3 in this manner are sequentially introduced into the drying chamber 4 as the carriage 3 circulates on the traveling track 2. Then, while passing through the inside of the connecting member 31, the steam introduced into the steam pipe 41 obtains heat and is dried, and is sequentially carried out of the drying chamber 4 to the outside.

The temperature inside the drying chamber 4 is always detected by the temperature sensor 75, and the result of this detection is always input to the control means 8. And
The control unit 8 performs a comparison operation between the set temperature and the detected temperature input from the input device 81 in advance,
When the detected temperature is higher than the set temperature, a command signal for reducing the valve resolving power is transmitted to the control valve 43, and
When the detected temperature is lower than the set temperature, a command signal for increasing the valving degree is transmitted. Due to this feedback control, the inside of the drying chamber 4 is always at a preset temperature within an allowable range.

Therefore, after the carriage 3 has passed through the inside of the drying chamber 4, the veneer P placed thereon is a dried veneer P2 which has been completely dried. Then, the carriage 3 that has exited the drying chamber 4 reaches the single-plate discharge device 6 provided downstream of the drying chamber 4. In the veneer discharge device 6, the veneer scraping means 64 is operated in a state in which the veneer 3 is always synchronized with the moving speed of the carriage 3 by a command signal from the control means 8, and is loaded into the veneer accommodating portion 34. The dried veneer P2 has its valley portion 35 between the partition members 3b abutted against the veneer scraping means 64, and is pushed upward from the veneer accommodating portion 34 by the operation of the veneer scraping means 64, The roller mechanism 65 is sandwiched between a pair of upper and lower rollers 65a, 65a.

The rollers 65a, 65a
Is controlled by a command signal transmitted from the control means 8.
Is rotated at a speed proportional to the moving speed of the veneer, and the dried veneer P2 is pulled up until the next dried veneer P2 is brought into contact with the veneer scraping means 64, and the dried veneer P2 is pulled up. In order to place the veneer P2 on the veneer receiving table 62, the veneer P2 is rotated counterclockwise in FIG.

The veneer discharge mechanism 63 synchronizes such an operation with the moving speed of the trolley 3, and
Since it is configured to repeat every time, the dried veneer P2 attached to the carriage 3 that has reached the veneer discharge device 6
Are sequentially stacked on the veneer receiving table 62 as the carriage 3 advances.

The dried veneer detection sensor 74 provided in the vicinity of the veneer discharge device 6 detects the state of lamination of the dried veneer P2 on the veneer receiving table 62 and controls the detection result. When the number reaches the preset number, the control means 8 transmits an operation command signal to the second vacuum gripping means 66. Then, the dried veneer P2 is sucked and gripped, and is sequentially discharged to a subsequent process.

As described above, the drying apparatus 1 of the present invention is configured to be operated under the comprehensive control of the control means 8, and the initial setting relating to the operating conditions is performed from the input device 81 before the operation is started. , The operation is automatically performed, so that labor saving can be effectively promoted, which is advantageous in reducing the operation cost.

In the present embodiment, the drying apparatus 1 is fully automated. However, the drying apparatus 1 of the present invention is not limited to the above-described comprehensive automation. Only the circulation movement speed and the temperature management in the drying chamber 4 are automated, and the dolly veneer P1 in the veneer charging device 5
Loading operation to the pallet and the dried veneer P pulled out from the cart 3
Partial automation may be performed in which the unloading operation 2 is processed by a human operation by an operator. Even with such a partial automation, it is possible to obtain a sufficient labor-saving effect as compared with the conventional veneer drying method.

[0070]

As described in detail above, in the wood drying apparatus of the present invention, a plurality of bogies are arranged so as to be able to circulate on an annular traveling track, and each bogie crosses in the vehicle width direction at the top. A plurality of partition members are erected, a veneer storage portion for placing the veneer in a substantially upright posture is formed between the partition members, and a tunnel-shaped drying chamber is provided on a part of the traveling track. A veneer loading device for loading undried veneers into the veneer storage unit and a veneer discharge device for removing dried veneers from the veneer storage unit on the upstream and downstream sides of the drying chamber, respectively. Is provided.

Accordingly, by causing a plurality of trucks to travel on the annular traveling track, each truck sequentially circulates and moves between the veneer loading device, the drying chamber, and the veneer discharging device. And a plurality of partition members crossing in the vehicle width direction are erected on the trolley, and a veneer receiving portion for placing the veneer in a substantially upright posture is formed between the respective partition members. Upon reaching the veneer loading device, if veneers are sequentially loaded from the veneer loading device into the veneer accommodating section on the bogie, when the bogie passes through the device, the veneer is placed on the bogie. A large number of veneers are vertically arranged side by side, and a large number of undried veneers are loaded on the cart with a very small area.

The cart loaded with a large number of veneers is
Next, it is introduced into a drying chamber, and moves while being dried in the drying chamber. In this case, even if the temperature distribution in the drying chamber is uneven, since all veneers pass through the drying chamber, there is a difference in drying conditions between the veneers due to the uneven temperature distribution. Therefore, the variation in the moisture value between the veneers dried while moving through the drying chamber is very small.

If the veneers are accommodated on a trolley so that the grain direction is up and down, moisture is guided by the grain and the moisture hangs down.
It contributes to shortening of drying time.

The bogie on which the dried veneer has been mounted and has come out of the drying chamber reaches the position where the veneer discharge device is provided, and is mounted in the accommodation space by the operation of the veneer discharge device. Each veneer is sequentially discharged from the trolley, but the partition members provided on the trolley for holding the veneer in an upright posture are formed by standing bodies erected on both sides in the width direction of the trolley. Therefore, it is possible to arrange, for example, a veneer scraping unit, which is a part of the veneer unloading device, corresponding to the gap between the standing members in the width direction. The scraping action can be exerted on the portion, and the veneer can be discharged in a stable state. After the single veneer is discharged from the trolley, the veneer is moved to cause the veneer scraping means to relatively pass between the pair of standing bodies, so that the veneer discharge device can correspond to the next veneer. . When all the veneers are discharged, the bogie itself becomes empty and can be moved to the veneer loading device again.

As described above, by mounting an undried veneer in the vertical direction in the veneer receiving section formed on the carriage, the processing capacity is remarkably increased, and the volume of the drying chamber is minimized. This makes it possible to reduce the size of the drying apparatus, which is advantageous in reducing equipment costs.

Further, various sensors are installed at appropriate places to appropriately detect the moving state of the bogie on the traveling track, the state of supply of the veneer to the veneer loading device, and the like, and appropriately detect the state based on these detected values. By providing a control means for transmitting a drive signal for driving each component of the plate loading device and the single plate discharging device, it is easy to automate the entire drying device, and by realizing the automation, the drying device The operation cost can be greatly reduced.

An endless chain is stretched on one or a plurality of sprockets disposed along the inner edge of the traveling track, and the bogie is connected to the endless chain. It becomes possible to circulate the truck on the traveling truck.
And the moving speed of all the bogies can be easily controlled by adjusting the rotation speed of the sprocket, and the moving speed of the bogie synchronized with the operation of the veneer loading device and veneer discharging device is controlled. It is effective for easy operation.

Further, a plurality of partition members made of a pair of right and left inverted U-shaped members are provided upright on the upper surface of the bogie in the vehicle width direction in a state of being inclined in the traveling direction, and these are used to form the partition members. When a veneer receiving portion is formed between the partition members, a gap is formed between the left and right inverted U-shaped members of the partition member. By locating the discharge mechanism, the discharge mechanism can be configured to abut on the veneer to discharge the veneer, and the movement of the carriage after the veneer discharge causes the discharge mechanism to relatively pass through the gap. In addition, it is possible to form the discharge mechanism with a relatively simple configuration without preventing the movement of the bogie due to the obstruction of the discharge mechanism.

Further, at least a pair of optical sensors are provided at the reference position of the traveling track, and the optical sensors are set so as to detect the presence or absence of the partition member of the moving truck, and both optical sensors detect the partition member at the same time. If it is determined that the veneer receiving portion is formed between the two partition members, and if a control means for transmitting a loading command signal to the veneer loading device is provided, the veneer veneer receiving portion The veneer loading device operates only when the veneer is properly positioned in the veneer loading device and supplies the veneer to the accommodation section, for example, when there is no trolley,
Since the pair of optical sensors do not detect the presence of the partition member at the same time, for example, when the connection between one truck and the other truck arrives at the loading position of the veneer loading device, the veneer loading from the control means. The command signal for operating the device is never transmitted,
This is advantageous because malfunction of the device can be effectively suppressed.

In addition, a heating means for supplying heat for drying is provided on the inner wall surface of the drying chamber, and a fan for circulating the air in the room is installed. The temperature distribution can be equalized.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a wood drying apparatus according to the present invention.

FIG. 2 is a perspective view showing an example of a truck.

FIG. 3 is a side view showing a state in which a veneer loading device and a veneer discharge device are connected to each other.

FIG. 4 is a block diagram illustrating a control system of the wood drying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying device 2 Running track 21 Chain groove 21a Drive motor 21b Vertical axis 22 Endless chain 23 Sprocket 3 Bogie 3a Bogie main body 3b Partition member 31 Connection member 32 Wheel 33 Inverted U-shaped member 34 Single plate accommodation part 35 Valley part 4 Drying room 41 Steam pipe 42 Fan 5 Veneer loading device 51 Prop 52 Veneer supply table 52a Roller 53 Veneer supply mechanism 53a Horizontal axis 53b Chute 53c Supply roller 53d Cylinder 54 First vacuum gripping means 6 Veneer 62 Veneer 62 Veneer Receiving stand 63 Veneer ejection mechanism 64 Veneer scraping means 65 Roller mechanism 65a Roller 65b Horizontal axis 65c Cylinder 66 Second vacuum gripping means 71 Optical sensor 72 Number of revolutions sensor 73 Undried veneer single-plate detection sensor 74 Dried veneer single-panel detection sensor 75 temperature sensor 8 control means 81 input device Veneer P1 non-dried veneer P2 already dry veneer S steam

Claims (5)

(57) [Claims] 1. A wood drying apparatus for continuously drying veneers, comprising an annular traveling truck, a plurality of trucks arranged to circulate on the traveling truck, and an upper portion of each truck. A plurality of partition members arranged in the moving direction of the cart are erected, and a veneer receiving portion for placing the veneer in a substantially upright posture is formed between the respective partition members. A drying chamber in the form of a tunnel is provided, and a veneer loading apparatus for loading undried veneers into the veneer receiving section and an vulcanized veneer at the upstream and downstream sides of the drying chamber, respectively. veneer discharge device is provided to take out from the plate accommodating section, each partition member, both sides in the width direction of the carriage
A wood drying apparatus characterized by being formed by a pair of erected bodies erected on a part . 2. One or a plurality of sprockets are disposed along the inner edge of the traveling track, and endless chains are stretched over these sprockets. The bogie is connected to the endless chains, and the sprocket is driven by rotation. The wood drying apparatus according to claim 1, wherein the bogie is configured to move on a traveling track by circulating the endless chain. 3. The upright body according to claim 1, wherein the standing body is formed by folding a bar into an inverted shape.
The wood drying apparatus according to claim 1 or 2, wherein the wood drying apparatus is formed by an inverted U-shaped member obtained by bending . 4. At least a pair of optical sensors are provided at a reference position of the traveling track, and the optical sensors are set so as to detect the presence or absence of a partition member of the moving truck, and both of the optical sensors are simultaneously provided with the partition member. 4. The apparatus for drying wood according to claim 1, further comprising control means for transmitting a veneer loading command signal to the veneer loading apparatus when the veneer is detected. 5. A heating means for supplying heat for drying is provided on an inner wall surface of the drying chamber, and a fan for circulating air in the room is provided. Item 5. A wood drying apparatus according to Item 1, 2, 3 or 4.