JPH05170366A - Meandering correction of continuous veneer and its device - Google Patents

Abstract

PURPOSE:To prevent cutting of parallel-ogram parts of a continuous veneer in the latter process and to particularly improve yield and process efficiency of the veneer by keeping right and left deflection rotors standing by in a space on a conveyor while the continuous veneer passes within a meandering allowable value and automatically correcting meandering by way of respectively lowering each of the right and left deflection rotors and bringing them into contact with each other only at the time when it exceeds the allowable value. CONSTITUTION:This is a meandering correction device of a continuous veneer consisting of a pair of right and left deflection rotors 4R, 4L installed in a space on a conveyor 3, a pair of right and left veneer detectors 5R, 5L installed in the neighbourhood of a carrier end edge of a continuous veneer 1 and a control circuit 10 connecting lift systems 9R, 9L of the deflection rotors 4R, 4L with each other free to respectively move by detection signals of the veneer detectors 5R, 5L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a continuous veneer which is irregularly meandered left and right due to a difference in left and right shrinkage ratio, such as a continuous veneer which is dried and carried out by a continuous dryer or the like. The present invention relates to a method for correcting meandering of a band-shaped product and a device therefor.

[0002]

2. Description of the Related Art A conventional method and apparatus for correcting the meandering of a continuous veneer, which is one of the continuous strip-shaped products of this kind, is disclosed in, for example, Jpn.
No. 5-16907 A veneer veneer conveying device is conveyed to both sides of a terminal end of a veneer conveying conveyor that conveys a continuous veneer veneer rewound by a rewinding device as disclosed in a meandering prevention device and the like. A veneer guide member that comes into sliding contact with both sides of the veneer is provided, and correction is made downstream of the veneer that contacts the entire width of the veneer to be transferred immediately before the transport device to the next process and intersects the traveling direction at a certain angle. By providing the roll, a method of correcting the irregular left and right meanders while bringing the meander to one side of the single plate guide member has been performed.

[0003]

However, a continuous veneer or the like that is dried by a continuous drying device or the like and carried out has an abnormally large amount of meandering due to the difference in contraction ratio between the left and right sides, and the inside of the veneer during the carrying out process is abnormally large. In a meandering correction method using a conventional device to the extent that a sliding single plate guide member is provided, either side of the single plate in the transporting process is strongly pressed by the single plate guide member and the material is damaged, or the material is damaged and overcome. There are many situations that make it impossible to continue the correction work.Furthermore, the lateral movement amount becomes too large in the meandering correction operation that only moves the veneer to one side by the correction roll that intersects with the traveling direction at a certain angle. There is a problem that the material is damaged and it cannot be fully corrected.Generally, the process due to the reduction in veneer yield due to the parallelogram cutting mode in the subsequent process due to insufficient correction of meandering and interruption of meandering correction work In which there is a serious drawback to be evil reduced rate.

Therefore, according to the present invention, in order to eliminate the drawbacks of the conventional method, the single veneer guide member which slides on both sides of the continuous veneer to be conveyed is not provided, and the continuous veneer in the conveying process is allowed to meander. The left and right deflection rotators for correcting meandering are kept waiting in the space on the conveyor at all times without contacting the continuous veneer while passing within the value, and only when the allowable value is exceeded. Are brought into contact with each other by descending and abutting, and the meandering is automatically generated by the couple force generated by the left and right deflecting rotary members for frictional subordinate movement and by the conveyor sliding action of the conveyor to intersect the conveying direction of the continuous veneer. It is intended to improve the veneer yield and process efficiency by making a correction.

[0005]

In order to achieve the above object, the method for correcting meandering of a continuous veneer according to the first aspect of the present invention comprises the following constitutional requirements.

(1-a) The continuous veneer is erected in a space on a conveyor for transporting in the direction orthogonal to the fiber direction such that its rotation direction is symmetrically inclined with respect to the transport direction and that each veneer can be lifted and driven independently. A pair of left and right deflection rotating bodies.

(1-b) By the detection signals of the pair of left and right veneer detectors which are transmitted when the continuous veneer in the above-mentioned conveying process meanders beyond its allowable value.

(1-c) Controlling so that the meandering is corrected by a couple force generated by descending and abutting on the continuous single plate in the carrying process and intersecting in the carrying direction.

The meandering correction device for a continuous veneer according to the second aspect of the present invention has the following constitutional requirements.

(2-a) The continuous veneer is erected in a space on a conveyor for conveying in a direction orthogonal to the fiber direction such that its rotational direction is symmetrically inclined with respect to the conveying direction, and can be vertically moved and driven independently. A pair of left and right deflection rotating bodies.

(2-b) A pair of left and right veneer detectors installed near the conveyance edge of the continuous veneer so as to detect the meandering of the continuous veneer in the carrying process.

(2-c) A control circuit in which the raising / lowering mechanism of the deflection rotator can be activated for each of the right and left sides by the detection signal of the single plate detector.

[0013]

[Operation] Since the present invention is configured as described above,
The permissible value for meandering of continuous veneer is set by the distance between the pair of left and right veneer detectors.If the edge of the continuous veneer is located within the set value, abrasion resistance of urethane resin etc. for correcting meandering The left and right deflecting rotary bodies in which the coefficient of friction material is coated on the pulleys etc. are both located in the upper space, and the continuous veneer meanders due to the difference in the left and right contraction ratios, for example, meandering to the right in the transport direction. When the veneer detector on the right side, which is in the normally open state, detects the edge of the continuous veneer and closes, the detection signal is transmitted to the lifting mechanism on the left side in the transport direction and descends the deflection rotating body on the left side. Then, the continuous veneer is sandwiched and conveyed together with a conveyor made of a material having a low friction coefficient such as a net and having a good sliding property, and is crossed in the conveying direction due to the friction slave operation of the deflection rotating body and the conveyor sliding action of the conveyor. Due to the couple generated to the left Lateral movement that gradually deflects the whole of the continuous veneer to the left is started, and then the lateral veneer detects that the right veneer detector does not detect the edge of the continuous veneer and returns to the normally open state again. Since the detection signal is transmitted to the left-side elevating mechanism, the left-side deflection rotating body is controlled to slide again in the upper space and return to the normal state. Contrary to the above case, the continuous veneer meanders to the left in the transport direction, and when the left-side normally closed veneer detector does not detect the edge of the continuous veneer and the open state is detected. The signal is transmitted to the elevating mechanism on the right side in the conveying direction to lower the right-side deflection rotating body to sandwich and convey the continuous veneer together with the lower conveyor. The lateral movement of the entire continuous veneer is gradually deflected to the right by the couple generated to the right by crossing the conveying direction by the transportation slip action of the lateral vehicular movement. When it detects the edge of the continuous veneer and returns to the normally closed state again, the detection signal is transmitted to the right-side lifting mechanism, so that the right-side deflection rotator again slides into the upper space. And let it return to normal It is your, automatic correction effect of the meandering of the continuous veneer in irregularly generated on the left and right by the difference in shrinkage rate and the like during drying are those that are to be carried out in secure.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. A slippery conveyor 3 made of a low friction coefficient material such as a net of a continuous dryer 2 for conveying a continuous veneer 1 in a direction orthogonal to the fiber direction. In the space above the terminal end of the continuous veneer 1, the direction of rotation of the continuous veneer 1 is rotated in a slightly symmetrical manner with respect to the conveying direction, for example, in an outwardly inclined direction by about 7 to 15 degrees such as the deflection angle A shown in the figure. Deflection rotary bodies 4R, 4 in which a pulley or the like is coated with a material having a high friction resistance coefficient such as urethane resin whose direction is inclined.
L is installed and a predetermined permissible meandering interval is provided on the relay belt conveyor 11 or the like which is closer to the carry-out side than the installation location of the rotating bodies 4R and 4L so that the meandering of the continuous veneer 1 in the carrying process can be detected. The pair of left and right single plate detectors 5R and 5L are installed so as to be separated by S, for example, about 200 mm, and the single plate detector 5
According to the detection signals of R and 5L, the left and right deflection rotating bodies 4R,
The left and right lifting mechanisms 9R and 9L including the arms 6R and 6L for lifting and lowering the 4L separately, the air cylinders 7R and 7L, and the pedestals 8R and 8L are crossed, that is, the lifting and lowering mechanism 9L with respect to the single plate detector 5R. Further, the elevating mechanism 9R is connected to the left and right of the veneer detector 5L and connected to the control circuit 10 which is activated to constitute a continuous veneer meandering correction device. Next, the operation will be described. The left and right deflection rotating bodies 4R and 4L are erected so as to always be located in the space above the conveyor 3 so as not to interfere with the normal conveyance of the continuous veneer 1 and contract right and left. When the continuous veneer 1 meanders to the right in the transport direction due to a difference in rate, for example, the veneer detector 5R located on the right side in the normally open state transmits a closed circuit detection signal to the control circuit 10, and the control circuit 10 Immediately by operating the air cylinder 7L of the left elevating mechanism 9L downward, the left deflection rotating body 4L is brought into contact with the continuous veneer 1 via the arm 6L and lowered to a position to be driven to continue with the conveyor 3. The veneer 1 is continuously held and conveyed. Since the left-side deflection rotating body 4L is attached obliquely outward,
Due to the frictional follow-up operation of the deflection rotating body 4L and the conveyance sliding action of the conveyor 3, a leftward couple BL that intersects the conveyance direction as shown in the drawing is generated along with the rotation thereof to gradually move the edge of the continuous veneer 1. Automatically correct the meander to the right while moving horizontally to the left. Further, by the above-mentioned meandering correction operation, the continuous single plate 1 is detected from the right single plate detector 5R.
When the edge of the continuous veneer 1 comes off and the detection signal is not transmitted to the control circuit 10, the timer 10L or the like provided in the control circuit 10 normally operates and the edge of the continuous veneer 1 falls within the allowable value. Even if it does, the deflection rotating body 4L on the left side is not immediately returned upward, and a slight delay time is taken, for example, 5 to 5
A delay time of about 10 seconds is taken to prevent frequent hunting phenomena, etc., while the air cylinder 7L of the left lifting mechanism 9L is gently actuated to the ascending side to move the left deflection rotating body 4L to a normal spatial position. Control to automatically return. Contrary to the above case, when the continuous veneer 1 meanders to the left side in the conveying direction, the veneer detector 5L located on the left side and normally in the normally closed state transmits the open circuit detection signal to the control circuit 10. , The control circuit 10 immediately moves the air cylinder 7R of the right lifting mechanism 9R downward to lower the right deflection rotary member 4R to the continuous veneer 1 via the arm 6R and lower it to a position to be driven. The continuous veneer 1 is continuously held and conveyed together with the conveyor 3. The right-side deflection rotator 4R is also mounted obliquely outward as in the case of the left-side deflection rotator 4L described above. Therefore, the deflection rotator 4R is rotated by frictional follow-up operation of the deflection rotator 4R and the conveyor sliding action of the conveyor 3. As a result, a rightward BR as shown in the drawing intersecting with the conveying direction is generated to gradually move the edge of the continuous veneer 1 laterally to the right while automatically correcting the meandering to the left. To do so. Further, by the correcting operation of the meandering, the edge of the continuous veneer 1 is detected again by the left veneer detector 5L, and the detection signal of the open circuit up to that time is changed to the detection signal of the closed circuit and is sent to the control circuit 10. When it is transmitted, the timer 10R or the like provided in the control circuit 10 normally operates to take a slight delay time as in the case described above and prevent the frequent hunting phenomenon and the like, and move up and down on the right side. Since the air cylinder 7R of the mechanism 9R is controlled to be gently activated to the upward side to automatically return the right-side deflection rotating body 4R to the normal spatial position, it is irregular to the left and right due to the difference in shrinkage rate during drying. The automatic correction operation of the meandering of the continuous veneer 1 that occurs in 1) is performed safely and reliably.

[0015]

As described above, the present invention does not require a veneer guide member or the like which is in sliding contact with both sides of a continuous veneer to be conveyed, and the continuous veneer in the conveying process has a permissible value of meandering. While passing through the inside, the correction roll etc. for correcting the meandering is always kept waiting in the space on the conveyor without abutting on the continuous veneer, and meandering to the left or right and only when the allowable value is exceeded The deflecting rotary bodies are brought into contact with each other by descending and abutting, and the meandering is generated by a couple force generated by each of the left and right sides by intersecting the conveying direction of the continuous veneer due to the frictional subordinate movement of the left and right deflecting rotary bodies and the conveyor sliding action of the conveyor. Since it is configured to automatically correct, the veneer guide member that slides on both sides of the veneer to be transferred, as in the conventional device, or the entire width of the veneer guide member, and intersects with the traveling direction at a certain angle. A correction roll is installed It is possible to completely avoid breakage of the veneer material in the conveying process due to the above and interruption of the correction work due to overcoming the veneer, etc., especially when the method and the apparatus of the present invention, Completely wipes the decrease in veneer yield due to the parallelogram cutting mode due to the meandering of the veneer and the decrease in process efficiency due to the interruption of the meandering correction work, and always demonstrates the stable automatic meandering correction function safely and reliably. It was possible to do so, and the effect of implementation is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an embodiment.

FIG. 2 is a side view of the same.

[Explanation of symbols]

 1 Continuous Single Plate 2 Continuous Dryer 3 Conveyor 4R, 4L Deflection Rotating Body 5R, 5L Single Plate Detector 6R, 6L Arm 7R, 7L Air Cylinder 8R, 8L Cradle 9R, 9L Lifting Mechanism 10R, 10L Timer 10 Control Circuit 11 Belt conveyor A Deflection angle BR, BL Couple

Claims (4)

[Claims] 1. A pair of right and left, which are installed in a space above a conveyor for transporting a continuous veneer in a direction orthogonal to the fiber direction, in which the rotation direction is symmetrically inclined with respect to the transport direction, and which are individually erected and vertically driven. The deflecting rotating body is individually brought into contact with the continuous veneer in the carrying process by the detection signals of the pair of left and right veneer detectors which are transmitted when the continuous veneer in the carrying process meanders beyond its allowable value. And a meandering correction method for a continuous veneer characterized by controlling so that the meandering is corrected by a couple generated by intersecting in the conveying direction. 2. A pair of left and right installed in a space on a conveyor for transporting a continuous veneer in a direction orthogonal to the fiber direction, the rotation direction of which is symmetrically inclined with respect to the transport direction, and which are individually erected so as to be vertically movable and driven. A deflection rotator, a pair of left and right veneer detectors installed near the conveying edge of the continuous veneer so as to detect the meandering of the continuous veneer during the conveying process, and the deflection based on the detection signal of the veneer detector. A meandering correction device for a continuous single plate, comprising: a control circuit in which a lift mechanism for a rotating body is connected to each of the right and left sides so as to be activated. 3. The continuous veneer meandering correction device according to claim 2, wherein the conveyor is a net, chain or roll of low friction coefficient material. 4. The meandering correction device for a continuous veneer according to claim 2, wherein the deflection rotating body is a wear-resistant coated pulley made of a material having a high friction coefficient.