JP3165512B2 - A hot plate that constitutes an endless orbit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shape of a hot plate in a plate processing apparatus using an endless track.

[0002]

2. Description of the Related Art Conventionally, in a single-stage or multi-stage press in which a hot plate surface is brought into direct contact, a plate such as a veneer veneer or a sawing plate is sandwiched between the hot plates, so that steam is generated in the veneer. Moisture hardly escapes and often remains in the veneer. In addition, when the hot plate is opened in this state, the accumulated water vapor is released at a stretch to the outside of the veneer, resulting in damage to the veneer. Therefore, between the hot plates, the degassing of the moisture contained in the veneer generated at the time of the heat and pressure in the veneer was once released to the outside air by opening and closing the hot plate. In the case of a hot plate of the type, this was performed by a simultaneous pressing method to prevent damage to the veneer. However, on the other hand, it is mechanically complicated, and there is also a poor thermal efficiency in that the material once heated and pressed is released halfway.

On the other hand, as disclosed in Japanese Patent Application No. 02-080888, "A plate processing apparatus using an endless track", an endless track in which a plurality of narrow-width hot plates are arranged adjacent to each other is paired up and down. If the veneer is heated and dried with a veneer interposed between the opposing endless orbits, the water vapor generated in the veneer at the time of hot pressing is between the hot plate and the hot plate disposed adjacent thereto. Since the gas is released into the outside air from a certain clearance, degassing is possible without opening and closing the hot plate.

[0004] The outline of Japanese Patent Application No. 02-080888 "A plate processing apparatus using an endless track" will be described below. Beams 2 extending in the front-rear and left-right directions are provided from a machine frame 1 erected on one side in a horizontal plane, and shafts 3 and 3 are arranged on the beams 2 between bearings arranged at fixed intervals on the left and right. Are supported as a pair in the front-rear direction. A chain 5 is wound endlessly between chain wheels 4 and 4 fitted to both ends of the shafts 3 and 3 to form a pair of chain conveyors 6 and 6. Between the pair of chain conveyors 6, 6, a small-width-shaped heat medium passage is formed through an attachment 7 fixed to the outer surface of the chain 5, 5 and through which a heat medium (hereinafter simply referred to as a heat medium) passes. A number of hot plates are arranged adjacent to each other so as to be parallel to each other, thereby forming an endless track. the above,
The heat medium passage has a single-row passage structure or a double-row turnback passage structure according to the width of the heating plate 8.

On the inner beam 2 surrounded by the heat plate 8 of the endless track 9, a rotary shaft 12 having a header portion 12 A in which a heat medium supply portion 10 and a discharge portion 11 are specially partitioned via a bearing. A rotary joint 15 having a heat medium supply port 13 and a discharge port 14 is fitted to the shaft end on the machine frame 1 side, and at least the endless track 9 is fitted to the other shaft end.
A coupling pipe 17 having a length up to the turn-up portion 16 of the endless track 9 extends from the supply portion 10 to the inlet side of the heat medium passage of the hot plate 8 and from the outlet side of the heat medium passage of the heat plate 8 to the discharge portion 11. As many as the number of hot plates 8 are connected. Therefore, if the number of the hot plates 8 is 32 as illustrated in the figure, the number of the joint pipes 17 from the supply portion 10 and the discharge portion 11 is both 32. In the drawing, a joint receiver 17A is bundled through the joint pipe 17 to prevent the joint pipe 17A from becoming entangled.

As shown in FIG. 2, the endless track 9 transfers the driving force of the motor 19 to the gear 18 fitted to the end of the shaft 3 as shown in FIG.
0, the gear 21 is rotated by being passively moved through the chain 23A, but a gear 21 having a different number of teeth is fitted coaxially with the gear 18, and the gear 21 and the gear fitted to the rotary shaft 12 are fitted. A chain 23B is wound around 22 so that one rotation of the endless track 9 and one rotation of the rotating shaft 12 are synchronized. As the synchronization means, in addition to the mechanical gear change described above, a pulse transmitter is connected to each of the shaft 3 and the rotating shaft 12 of the endless track 9 so that both are electrically synchronized. You may. In addition, the endless track 9 is not limited to the horizontal installation, and may be inclined or vertical. If the rotating shaft 12 is also provided at a substantially central position in the endless track 9, the distance to the turnback 16 of the endless track 9 is equally divided, Although the length of the joint pipe 17 can be minimized, it does not matter if it is deviated to either side. Further, the supply and discharge of the heat medium to and from the heating plate 8 are not performed individually, but a plurality of adjacent heating plates 8 are grouped (in the illustrated example, 18 groups are grouped together). A joint pipe 17 having at least the length of the folded portion 16 of the endless track 9 is connected to the inlet side of the heat medium passage of the hot plate 8, and a connecting joint 24 is provided at the outlet side and the inlet side of the adjacent hot plate 8. (FIG. 1), and further, from the exit side of the heat medium passage of the hot plate 8 at the end to the discharge portion 11 by the joint pipe 17, the supply portion 1
It is sufficient that the number of the joint pipes 17 from the zero and the discharge part 11 is both two, and the diameter of the rotary shaft 12 can be made smaller particularly at the part connecting the joint pipe 17 as compared with the former.

One rotation of the endless track 9 and the rotation of the rotating shaft 12 are controlled in synchronization with the rotation of the motor 19, but one rotation of the rotating shaft 12 is a circular orbit. While the angular velocity is constant, one rotation of the endless track 9 is a track-shaped orbit, so the angular velocities are different even if the peripheral velocities are the same. For this reason, with respect to the adjustment of the length of the joint pipe 17 due to the difference between the two tracks, a mechanism that allows the joint pipe 17 to extend from the position of the rotating shaft 12 to the maximum length that reaches the folded portion 16 of the endless track 9, for example, Regarding the adoption of a rod type that slides in the cylinder, and the prevention of torsion of the joint pipe 17 due to the difference in angular velocity,
What is necessary is just to connect between the inlet side and the outlet side of the hot plate 8 and the supply part 10 and the discharge part 11 of the rotary shaft 12 via a rotary joint.

At present, a flexible pipe is suitable as a material which can eliminate both the length adjustment and the prevention of twisting of the joint pipe 17, and according to this, the hot plate 8 is bent from the shortest position and the most bent state. With the movement on the endless track 9, the bent portion gradually extends to reach the folded portion 16, and after the folded portion, the flexible portion continuously rotates while gradually bending again. Each time a torsional stress is applied, it can be eliminated by the elastic properties of the material.

When the heat medium is circulated between the group of hot plates 8 by the connecting joint 24, the space between the adjacent hot plates 8 at each turn-up portion 16 is slightly widened. At this time, for example, in the case where the plate body 25 to be processed is a veneer veneer, a steam,
A heating medium such as hot oil is constantly supplied and discharged to dry the veneer veneer and maintain the temperature of each hot plate 8 as desired. FIG.
8 are provided with the endless track 9 in the above embodiment as a pair of upper and lower ends, and the plate 25 to be processed is interposed between the endless tracks 9 and 9.
This is an embodiment in which the sheet is heated by pinching and conveying.

As shown in FIG. 6, the drive system of the upper endless track 9 is a gear that is wound around the speed reducer 20 and the gear 18 on the shaft 3 and engages with the chain 23A that transmits rotation. A chain 28 is suspended around the gear 26 and the gear 27 on the shaft 3 of the upper endless track 9 so that the lower endless track 9 and the upper endless track 9 are rotated at equal speeds in opposite directions. Has been made. The drive system of the upper rotating shaft 12 is as follows.
A gear 29 meshing with the driving chain 23B of the rotary shaft 12 in the above embodiment, and a gear 30 on the upper rotary shaft 12
At this time, a chain 31 is wound, and rotation at a constant speed is transmitted to the upper rotating shaft 12 in a direction opposite to the lower rotating shaft 12.

Although not shown, the upper or lower endless track 9 and the portion attached thereto can be adjusted in the vertical position by using a screw, a hydraulic jack, or other appropriate means to adjust the beam 2 that cantileverly supports them. , Plate 25 to be processed
It is possible to cope with a change in the thickness of the sheet.

Therefore, if the plate 25 such as a veneer veneer is inserted between the upper and lower tracks 9, 9, the plate 2
The upper and lower surfaces 5 are directly contacted by the upper and lower heating plates 8 while being lightly pressed and held, and move along a flat portion with the rotation of the endless tracks 9, 9 to reach the folded portion 18. Can be dried.

In this conventional example, a hot plate in which a heating medium passage (hereinafter simply referred to as a heating medium) is formed is described, but the heating plate is indirectly heated by a burner, a heater or the like. In some cases.

[0014]

Since the moisture in the veneer heated by the hot plate evaporates and expands, the expansion pressure of the water increases, and the water passes through the cell membrane of the wood to a lower pressure region. Eventually, it flows out to the lowest pressure area, that is, outside the veneer, but there are two outflow paths for vaporized moisture (hereinafter referred to as steam) out of the veneer. One flows out of the side of the veneer through the veneer and the other flows out of the front and back of the veneer.

[0015] However, the water vapor flowing out from the front and back surfaces of the veneer is sandwiched and conveyed between a pair of small plate-like hot plates in which a plurality of veneers are arranged adjacent to each other. The water vapor that could only flow out of the veneer through a small amount of clearance, and could not flow out of the clearance, was almost directly on the front and back of the veneer in which the fibers were inserted perpendicular to the transport direction. The water vapor moves along the groove of the fiber running, but the clearance is almost parallel to the fiber of the veneer, so it cannot flow out of the clearance and flows out to the side of the veneer through the groove of the fiber, It does not cross the clearance.

Therefore, if the water vapor does not intersect with the clearance, the water vapor cannot flow out from the front and back surfaces of the veneer, but flows out from the side surface.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention is directed to an endless orbiting heat plate in which a plurality of small-width hot plates are arranged adjacent to each other to form a pair of upper and lower endless tracks. In between, in a plate processing apparatus that heats and dries while transferring a veneer in between, the positions of both ends of the narrow-width hot plate are the same on a line orthogonal to the traveling direction of the hot plate, Within the interval between both ends of the hot plate, there is provided a hot plate constituting an endless track, wherein a hot plate which is non-straight is arranged adjacently on a line perpendicular to the traveling direction of the hot plate.

[0018]

The non-straight line between the two ends of the hot plate on the line perpendicular to the direction of travel of the hot plate, the clearance between the hot plate and the hot plate is also on the line perpendicular to the direction of travel of the hot plate. As a result, the fiber grooves and the clearances that run almost right beside the front and back surfaces of the single veneer passed through cross each other. In addition, steam that cannot flow out of the clearance on the front and back surfaces of the hot plate and unavoidably moves to the side surface along the groove of the fiber of the veneer will intersect the clearance in the middle of the movement, and travels to the side surface of the veneer. It can flow out of the veneer from the position where it crosses the clearance.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the accompanying drawings. FIG. 9 shows a large number of small-width hot plates 51 arranged adjacent to each other via an attachment 7 fixed to the outer surfaces of the chains 5, 5. The configuration is such that the positions of both ends of the hot plate 51 are orthogonal to the traveling direction. On the same line as the hot plate 5
1 is bent at the center of a line perpendicular to the traveling direction between both end portions.

Further, the veneer veneer 50 is formed from the shape of the hot plate 51.
At the insertion side of the veneer veneer veneer 50,
On the take-out side, both ends of the hot plate 51 protrude.
Is conveyed only in the flat portions of the endless tracks 9, 9,
At the folded portion 18, that is, at the portion where the veneer is inserted and taken out, there is no effect since the holding by the hot plate is released.

Endless tracks 9, 9 provided as a pair of upper and lower
The veneer veneer 50 inserted in the direction in which the fiber direction is perpendicular to the transport direction of the hot plate 8 is transported while being sandwiched between the hot plates 51 and is heated and dried. At this time, veneer veneer 50
The steam that is about to flow out from the front surface, for example, the steam that has flowed out from the point A in the figure, is obstructed by the hot plate 51 so that the hot plate 51 and the veneer veneer
The gap formed between the fiber grooves on the surface of No. 0 is moved in the direction of the arrow shown in the drawing, that is, along the fiber grooves, and between the heat plate 51 and the hot plate 51 disposed adjacent to the fiber grooves. It flows out from the point B where a certain clearance intersects.

Similarly, on the back surface of the veneer veneer 50, the water vapor flowing out from the back surface crosses the fiber grooves on the back surface and the clearance on the hot plate 51 in contact with the back surface. Spills out of position.

FIGS. 10 to 12 also show that the positions of both ends of the hot plate are the same on a line orthogonal to the traveling direction of the hot plate, while the position of the hot plate It is an embodiment of a hot plate that is non-straight on a line orthogonal to the direction,
These also have the same operation and effect as FIG. 10, and the hot plate 52 in FIG.
The bent portion, the hot plate 53 in FIG. 12 is curved between both ends thereof, and the hot plate 54 in FIG. 13 is a wavy curved portion between both ends thereof.

[0024]

As described above, according to the present invention, the shape of the hot plate forming the pair of upper and lower endless tracks is non-straight between the two ends of the hot plate on a line perpendicular to the traveling direction of the hot plate. However, the clearance between the hot plate and the hot plate also becomes non-straight on a line perpendicular to the direction of travel of the hot plate, so that the grooves and clearances of the fiber running almost directly on the front and back surfaces of the traversed veneer are Will intersect.

Further, water vapor which cannot flow out of the clearance on the front and back surfaces of the hot plate and unavoidably moves to the side surface along the fiber groove of the veneer also intersects the clearance in the middle of the movement. It is possible to flow out of the veneer from the position crossing the clearance without going to the side. Therefore, the escape of steam is improved, and the drying time is shortened.

[Brief description of the drawings]

FIG. 1 is a plan view of a plate processing apparatus using an endless track according to the present invention.

FIG. 2 is a side view of a plate processing apparatus using an endless track according to the present invention.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a front view of the case where the endless tracks are vertically arranged in the plate processing apparatus using the endless tracks.

FIG. 5 is a partially cutaway front view of FIG. 4;

FIG. 6 is a left side view of FIG. 4;

FIG. 7 is a right side view of FIG. 4;

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 5;

FIG. 9 is a front view of a hot plate 51 of the present invention.

FIG. 10 is a front view of a hot plate 52 of the present invention.

FIG. 11 is a front view of a hot plate 53 of the present invention.

FIG. 12 is a front view of a hot plate 54 of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Machine frame, 2 ... Beam, 4 ... Chain foil, 6 ... Chain conveyor, 8 ... Hot plate, 9 ... Endless track, 10 ... Heat medium supply part, 11 ... Heat medium discharge part, 12 ... Rotating shaft, 13 ... Supply Mouth, 14 ... outlet, 15 ... rotary joint, 17 ... joint pipe, 2
4 ... connecting joint, 25 ... plate to be processed, 50 ... veneer veneer,
51 ・ 52 ・ ・ ・ Bent hot plate, 53 ・ 54 ・ ・ ・ Bent hot plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-143140 (JP, A) JP-A-3-87201 (JP, A) JP-A-60-73802 (JP, A) 179806 (JP, U) Jiko 13-5351 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B27D 3/04 B27D 1/02 B27D 1/00 F26B 13/10

Claims (1)

(57) [Claims] An endless track in which a plurality of small-width hot plates are arranged adjacent to each other is paired up and down, a veneer is interposed between hot plates of the endless track facing each other, and heated and dried while being transferred. While the positions of both ends of the narrow-width hot plate are the same on a line perpendicular to the direction of travel of the hot plate, within the interval between both ends of the hot plate, the positions on the line perpendicular to the direction of travel of the hot plate A hot plate that constitutes an endless track, characterized in that a non-straight hot plate is arranged adjacently.