JPH11188806A - Heating device for strip body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly reduce the rejection rate of finished products by easily and surely uniformizing the water content of a strip body in the width direction, regarding a strip body heating device. SOLUTION: In a strip body 31 heating device equipped with an outlet guide roll 34, a roll elevator means which raising/lowering the outlet guide roll 34, and temperature sensors 1a, 1b which are installed side by side in the width direction of the strip body 31 to measure the surface temperature of the strip body 31 are provided. The roll elevator means raises/lowers the outlet guide roll 34 based on a difference between respective surface temperatures measured by the temperature sensors 1a, 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for a band, and more particularly to a heating device for a band suitable for use in a corrugating machine for heating a band such as a liner of a cardboard sheet.

[0002]

2. Description of the Related Art As shown in FIG. 7, generally, a corrugated cardboard sheet 30 has a back liner 30a and a front liner 3 as a band at each apex of a core paper 30b having a corrugated cross section.
0c is pasted with glue. In such a corrugated cardboard sheet 30, when there is a difference between the water content of the back liner 30a and the water content of the front liner 30c, there is variation in the water content in the width direction of each of the back liner 30a and the front liner 30c. In such a case, warpage occurs as shown in FIG. In FIG. 7, the back liner 30a
3 shows a warped state of the corrugated cardboard sheet 30 when the moisture content of the corrugated cardboard sheet 30 is larger than the moisture content of the front liner 30c.

[0003] When the cardboard sheet 30 is warped in this way, it hinders the box making operation and further degrades the quality of the cardboard sheet product. Therefore, in general, when manufacturing a corrugated cardboard sheet, the corrugated cardboard sheet 3
In order to prevent the occurrence of the zero warpage and facilitate the bonding of the back liner 30a and the front liner 30c to the core paper 30b, the corrugating machine is required to heat the back liner 30a and the front liner 30c as a band. Equipped with a heating device,
The back liner 30a and the front liner 30
c is allowed to dry.

The back liner 30a and the front liner 3
As a heating apparatus for heating a belt-like body such as 0c, there is a technique disclosed in Japanese Utility Model Publication No. Sho 62-43785, for example.
Here, about such a heating apparatus of a band-like body, FIGS.
Explaining with reference to FIG. 10, as shown in FIG. 8A, the heating device includes an inlet guide roll 32, a heating roll 33, and an outlet guide roll 34.

The strip 31 is sent to a heating roll 33 via an inlet guide roll 32, and the heating roll 3
After being heated and dried in step 3, the sheet is sent to the next step via an exit guide roll 34. Here, the entrance guide roll 32 has a structure that can move in a direction indicated by an arrow in FIG. 8A on a concentric circle with the heating roll 33 along an outer periphery thereof.

Then, the operator visually observes the warpage of the corrugated cardboard sheet 30 as a final product, and the band 31 such as a liner has a large moisture content, so that more heat is required to dry the band 31. If it is determined that there is, as shown by the arrow in FIG. 8B, the entrance guide roll 32 is moved counterclockwise to increase the winding angle θ of the strip 31 around the heating roll 33. The contact length between the strip 31 and the heating roll 33 is increased. Thereby, the degree of drying of the strip 31 can be increased.

Conversely, the operator operates the band 3 such as a liner.
When it is determined that the water content of the first material is small and that the strip 31 does not require much heat to dry,
(A), as shown by the arrow, the entrance guide roll 32 is moved clockwise to reduce the winding angle θ of the strip 31 around the heating roll 33, and the contact between the strip 31 and the heating roll 33 is reduced. Reduce the length. Thereby, the degree of drying of the strip 31 can be reduced.

Next, the outlet guide roll 34 will be described. Here, FIG. 9A is a schematic plan view of the exit guide roll 34, and is a view as viewed from an arrow A in FIG. 8A (however, the heating roll 33 is omitted). FIG. 9 (b)
FIG. 10 is a sectional view taken along line BB of FIG. As shown in FIG. 9A, the outlet guide roll 34 has a shaft 35a on one side rotatably supported by a bearing 37 fixed to a frame 40a via a bearing 36a.

On the other hand, the shaft 35b on the other side is
6b, the bearing 38 is rotatably supported by a bearing 38. The bearing 38 has rails 39 fixed to a frame 40b.
39, so that the other end 35b can be moved up and down along the rails 39, 39 on the inner surface of the frame 40b. This bearing 38
As shown in FIG. 9 (b), a groove 38a is provided in the lower part of the screw shaft 43.
3a is engaged.

The screw shaft 43 has an intermediate portion screwed with a screw seat 41 fixed to a frame 40b, and a handle 42 is fixed to a lower end thereof. In addition, instead of the handle 42, an ON-OFF type reversible rotation drive motor is also in practical use (for details, see Japanese Utility Model Publication No.
No. 85). Then, the operator visually observes the warpage of the corrugated cardboard sheet 30 as the final product, and turns the handle 42 in accordance with the visual observation, thereby turning the exit guide roll 34.
Is inclined.

That is, the handle 42 is operated by the operator.
Is rotated, the screw shaft 43 moves up and down with respect to the screw seat 41 (that is, with respect to the frame 40b), and accordingly, the bearing 38 moves up and down along the rails 39 and 39. Thus, the shaft 35b on the other side of the exit guide roll 34 moves in the vertical direction, and the exit guide roll 3
4 is inclined.

When the outlet guide roll 34 is inclined in this manner, the tension applied to the strip 31 in the width direction changes, and the contact heat transfer resistance between the heating roll 33 and the strip 31 changes. The amount of heat applied to the band 31 can be adjusted in the width direction of the band 31. As a result, the amount of heat applied from the heating roll 33 to the band 31 can be uniformly increased and decreased over the entire width of the band 31, as shown in FIG.
As shown in (c), it is possible to increase or decrease the value while controlling it to change linearly at a constant inclination angle.

[0013]

However, the prior art has two major problems as follows. (1) The operator of the heating device visually observes the warpage of the corrugated cardboard sheet 30 as the final product and operates the entrance guide roll 32 and the exit guide roll 34. It takes many years of experience to learn the correlation with the amount of correction of the roll 32 and the exit guide roll 34, and variations occur due to individual differences, and until the warpage of the cardboard sheet 30 is corrected. It takes a long time, and the number of defective products increases accordingly. (2) When the corrugated cardboard sheet 30 has a wavy warp, that is, when the water content of the back liner 30a and the front liner 30c is wavy and distributed in the width direction of the corrugated cardboard sheet 30, for example, The sheet cannot be handled only by moving one end of the exit guide roll 34 in the vertical direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to easily and surely equalize the water content in the width direction of a belt-like body, thereby reducing a defective product rate. An object of the present invention is to provide a heating device for a belt-like body, which can be greatly reduced.

[0015]

According to a first aspect of the present invention, there is provided a heating apparatus for a belt-like body having an exit guide roll, comprising: a roll elevating means for elevating and lowering the exit guide roll. A plurality of temperature sensors arranged side by side along the width direction of the band and measuring the surface temperature of the band, and the roll elevating means, and a sensor for each surface temperature measured by the plurality of temperature sensors The outlet guide roll is moved up and down based on the deviation between the rollers.

According to a second aspect of the present invention, in the heating apparatus for a belt-shaped body according to the first aspect, the outlet guide roll is constituted by a curved cylindrical spreader bar, and the plurality of temperature sensors are A bar rotation motor configured to measure the surface temperature of the band while moving in the width direction of the band, a bar rotation motor for driving the spreader bar to rotate, the roll lifting / lowering means, and the bar rotation motor are independently provided. A control unit that controls the roll elevating unit based on the inter-sensor deviation of each surface temperature measured by the plurality of temperature sensors, and controls the roll elevating unit based on the plurality of temperature sensors. The rotation angle of the spreader bar through the bar rotation motor is adjusted based on the deviation in the width direction of the surface temperature of the strip.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, regarding the first embodiment,
This will be described with reference to FIGS. The apparatus for heating a strip according to the present embodiment is provided in a corrugating machine for heating a strip such as a liner of a corrugated cardboard sheet. As shown in FIG. , Heating roll 33 and outlet guide roll 3
4 is provided. Then, the belt-shaped body 31 is sent to the heating roll 33 via the entrance guide roll 32, is heated and dried by the heating roll 33, and is sent to the next step via the exit guide roll 34.

Here, as already described in the prior art (see FIGS. 8 (a) and 8 (b)), the inlet guide roll 32 is formed on a circle concentric with the heating roll 33 along the outer periphery thereof as shown in FIG.
(A) The structure is movable in the direction indicated by the arrow in FIG. Then, the operator visually observes the warpage of the corrugated cardboard sheet 30 as a final product, and checks the band-like body 3 such as a liner.
If it is determined that the moisture content of the first material is large and that the strip 31 needs more heat to dry,
(B) In the middle, as shown by the arrow, the entrance guide roll 32 is moved counterclockwise to increase the winding angle θ of the strip 31 around the heating roll 33, and the contact between the strip 31 and the heating roll 33 is increased. Increase the length. Thereby, the degree of drying of the strip 31 can be increased.

Conversely, the operator operates the band 3 such as a liner.
When it is determined that the water content of the first material is small and that the strip 31 does not require much heat to dry,
(A), as shown by the arrow, the entrance guide roll 32 is moved clockwise to reduce the winding angle θ of the strip 31 around the heating roll 33, and the contact length between the strip 31 and the heating roll 33. Shorten the length. Thereby, the degree of drying of the strip 31 can be reduced.

Here, the operator visually observes the warpage of the corrugated cardboard sheet 30 as a final product and adjusts the degree of dryness of the band 31. However, the present invention is not limited to this. The entrance guide roll 32 is automatically moved in accordance with the surface temperature of the
The degree of drying (moisture content) of 1 may be adjusted.

As shown in FIG. 1B, the outlet guide roll 34 has a shaft portion 35a on one side thereof rotatably supported by a bearing 37 fixed to a frame 40a via a bearing 36a. On the other hand, the shaft 35b on the other side is rotatably supported by a bearing 38 via a bearing 36b, and the bearing 38 is sandwiched between rails 39, 39 fixed to a frame 40b, whereby End 35b
Are engaged with the rails 39 so as to be able to move up and down along the frame 40b. The outlet guide roll 34 is configured in the same manner as that already described in the prior art (see FIG. 9A), but the means for raising and lowering the outlet guide roll 34 is different from the prior art. I have.

That is, as shown in FIG. 2, the bearing 38 is provided with a groove 38a at a lower portion thereof.
The upper end 43a of the screw shaft 43 is engaged with 8a. The bearing 38 is supported by the upper end 43a of the screw shaft 43. The screw shaft 43 has a frame 4
The screw shaft 41 is screwed with a screw seat 41 fixed thereto, and a sprocket 44 is mounted below the screw seat 41 at an intermediate portion of the screw shaft 43.

The sprocket 44 includes a sprocket 8a connected to a forward / reverse rotatable roll lifting / lowering motor 8 driven based on a command from a control unit 50 described later.
And a chain 9, and the screw shaft 43 can be rotated by the roll lifting motor 8. By rotating the screw shaft 43 in this manner, one of the bearings 38 of the outlet guide roll 34 can be moved up and down along the rails 39, 39. Since the side shaft 35b also moves in the vertical direction, the outlet guide roll 34 can thereby be inclined.

By inclining the outlet guide roll 34 in this manner, the tension applied in the width direction of the strip 31 can be changed, thereby reducing the contact heat transfer resistance between the heating roll 33 and the strip 31. Since it can be changed, the amount of heat applied to the band 31 can be adjusted in the width direction of the band 31. An oscillator 10 is provided at the lower end of the screw shaft 43.
Is attached. The oscillator 10 generates a number of pulses proportional to the amount of movement of the bearing 38 (the number of rotations of the screw shaft 43), and feeds it back to the control unit 50 described later.

Incidentally, these bearings 38, rails 39, 3
9, screw seat 41, screw shaft 43, sprockets 44, 8
a, the roll elevating motor 8, the chain 9, the oscillator 10, and the like constitute a roll elevating means 51. By the way, on the downstream side of the heating device according to the present embodiment, a plurality of (here, two) temperature sensors 1a and 1b are disposed so as to be movable within a range in which the width of the strip 31 is equally divided. .

These temperature sensors 1a and 1b are shown in FIG.
As shown in (b), the surface temperature of the strip 31 immediately after the strip 31 is heated and dried by the heating device is disposed immediately downstream of the outlet guide roll 34, and the surface temperature of the strip 31 is continuously measured in the width direction of the strip 31. Can be measured. That is, these temperature sensors 1a and 1b are fixed to the mounting seats 4a and 4b, respectively. Screw holes are formed in these mounting seats 4a and 4b.
It is screwed with a screw shaft 3 rotatably supported by a and 2b.

The mounting seats 4a and 4b are provided with holes near the screw holes to be screwed with the screw shaft 3 and in parallel with the screw holes.
A guide bar 5 fixed to a, 40b is inserted through the guide bar 5. The guide bar 5 prevents the mounting seats 4a, 4b from rotating around the screw shaft 3, and moves the mounting seats 4a, 4b in the axial direction. Can guide you.

The screw shaft 3 is formed with reverse screws on the left and right sides with respect to the center, and by rotating the screw shaft 3 forward and backward, as shown by arrows in FIG. ,
The temperature sensors 1a and 1b can be moved away from each other or closer to each other.
Thus, the surface temperature of the band 31 can be continuously measured in the width direction of the band 31.

One end of the screw shaft 3 is connected to a reversely rotatable sensor drive motor 6. A sensor position detector 7 is connected to the other end of the screw shaft 3.
By counting the number of pulses proportional to the number of rotations, the distance from the origin position (for example, the center position of the screw shaft) of the temperature sensors 1a and 1b can be measured. The screw shaft 3, the mounting seats 4a and 4b, the sensor driving motor 6
Thus, a sensor moving means for moving the plurality of temperature sensors 1a and 1b in the width direction of the band 31 within a range where the width of the band 31 is equally divided is configured.

The heating device for a belt-shaped body according to the present embodiment is provided with a control unit 50 for controlling the driving of the sensor drive motor 6 and the roll elevating motor 8 described above. As shown in FIG. 3, the control unit 50 includes a paper width W.
Paper width data corresponding to the dimensions shown in FIG. 1B is input in advance from a "production management device" (not shown).

The control unit 50 includes detection information detected during the operation of the heating device, that is, the distances from the origin positions of the temperature sensors 1a and 1b detected by the sensor position detector 7 and the temperature sensor 1a. , 3b detected by, 1b
The surface temperature of No. 1 is also input. Then, the control unit 50 controls the sensor drive motor 6 and the roll elevating motor 8 based on the input information.
Is controlled.

Specifically, the control unit 50 controls the paper width data,
Based on a signal from the sensor position detector 7, a command is output to the sensor drive motor 6 so that the surface temperature of the band 31 is constantly measured by the temperature sensors 1a and 1b. That is, when the operation of the heating device is started, the control unit 50 outputs a command to the sensor drive motor 6 to rotate the sensor drive motor 6 shown in FIG. Based on this command, the sensor drive motor 6 rotates forward, whereby the temperature sensors 1a and 1b waiting near the origin position in the center of the apparatus move in the direction away from each other.

When both of the temperature sensors 1a and 1b reach the side of the band 31 (that is, the distance from the origin position detected by the temperature sensor position detector 7 and the width of the liner paper previously input). (Width of band) 1
/ 2 becomes zero), the control unit 50 outputs a command to the sensor drive motor 6 to rotate the sensor drive motor 6 in the reverse direction. Based on this command, the sensor drive motor 6 starts to rotate in the reverse direction, whereby the temperature sensors 1a, 1b
Move toward each other.

As described above, in the present embodiment, the temperature of the left portion in the width direction of the band 31 can be measured by the temperature sensor 1a.
Thereby, it is possible to measure the temperature of the right side in the width direction of the strip 31. Further, the control unit 50 outputs a command to the roll lifting / lowering motor 8 based on signals from the temperature sensors 1a and 1b to move the bearing 38 at one end of the outlet guide roll 34 in the vertical direction. .

That is, the control unit 50 controls the temperature sensors 1a,
1b, the average temperature of the temperature sensor 1a and the average temperature of the temperature sensor 1b are calculated, and the temperature difference between the average temperature of the temperature sensor 1a and the average temperature of the temperature sensor 1b is calculated in advance. When the temperature difference becomes equal to or greater than the set value, a command is output to the roll elevating motor 8 shown in FIG. Based on this directive,
The roll lifting motor 8 is driven, whereby the bearing 38 at one end of the outlet guide roll 34 moves upward or downward.

The heating device for a belt-shaped body according to the first embodiment of the present invention operates as follows because it is configured as described above. That is, when the operation of the heating device is started, the sensor drive motor 6 is driven based on a command from the control unit 50, whereby the temperature sensors 1a and 1b waiting near the origin position in the central portion of the device. Move away from each other.

On the other hand, when both the temperature sensors 1a and 1b reach the side of the band 31 (that is, the distance from the origin position detected by the temperature sensor position detector 7 and 1/1 / the paper width previously input). 2 becomes zero), the sensor drive motor 6 starts reverse rotation based on a command from the control unit 50, and thereby the temperature sensors 1a, 1
b move in the direction approaching each other.

By repeating such an operation, the surface temperature of the band 31 is constantly measured by the temperature sensors 1a and 1b. When the temperature difference between the average temperature of the temperature sensor 1a and the average temperature of the temperature sensor 1b becomes equal to or more than a predetermined fixed value, the roll elevating motor 8 is driven based on a command from the control unit 50. As a result, the bearing 38 at one end of the outlet guide roll 34 moves upward or downward.

As a result, the tension in the width direction of the band 31 changes, and the amount of heat applied to the band 31 from the heating roll 33 changes, so that the temperature difference is corrected in such a direction as to disappear. Therefore, according to the heating device for a belt-shaped body according to the present embodiment, the operator observes the warpage of the corrugated cardboard sheet as the final product, and compared with the conventional technology in which the handle is operated, the surface temperature is immediately after the exit of the heating device. Is measured, and in response to this, the outlet guide roll 34 is automatically operated, and the surface temperature of the strip 31 is equalized. As a result, the water content in the width direction of the belt-shaped body 31 can be easily and reliably made uniform, so that warpage of the product can be prevented, and the defective product rate can be significantly reduced. There is an advantage that you can.

Further, there is an advantage that a time delay relating to control for preventing product warpage can be remarkably reduced, and an operator's experience, lack of know-how, and variations due to individual differences can be eliminated. Further, since the temperature sensors 1a and 1b are provided at positions where the width of the strip 31 is equally divided, it is only necessary to machine the screw shaft 3 with a reverse screw, and the sensor moving means can have a simple configuration. There is an advantage that you can.

Next, a second embodiment will be described. The heating device for a belt-shaped body according to the second embodiment is shown in FIG.
As shown in (b), the outlet guide roll is different from that of the first embodiment, and a spreader bar 20 is provided as an outlet guide roll. This spreader bar 20
As shown in FIG. 4 (a), the columnar roll has a curved shape, and during operation of the apparatus, the strip 31 comes into contact with the spreader bar 20 and runs while sliding. ing.

The spreader bar 20 has a shaft end 20a on one side, as shown in FIG.
3a, it is rotatably supported by a bearing 24, and its shaft end 20a is connected to the flexible coupling 2
1 is connected to the bar rotation motor 22. Then, by driving the bar rotation motor 22 based on a command from the control unit 50 described later, the spreader bar 20 can be rotated and its rotation angle can be changed.

On the other hand, the other shaft end 20b of the spreader bar 20 has the same structure and function as those described in detail in the first embodiment (see FIGS. 1 and 2). Further, the temperature sensors 1a and 1b and other configurations are the same as those of the above-described first embodiment, and thus description thereof is omitted here. Further, as shown in FIG. 5, the control unit 50 controls the sensor drive motor 6 based on the paper width data and the signal from the sensor position detector 7, and further controls each of the belt-like shapes measured by the temperature sensors 1a and 1b. When the difference in the average temperature of the body 31 becomes a value equal to or more than a certain value, the roll lifting motor 8
Are controlled, and these roll lifting / lowering means 51 are the same as those in the above-described first embodiment.

Further, in the present embodiment, the control unit 50
When the difference between the surface temperatures of the strips 31 measured by the temperature sensors 1a and 1b is equal to or more than a predetermined value (for example, the side surface temperature of each strip 31 measured by the temperature sensors 1a and 1b and the If there is a temperature difference between the temperature and the center surface temperature and the temperature difference becomes equal to or greater than a predetermined value, the control unit 50 outputs a command to the bar rotation motor 22 to output a command. By rotating the curved spreader bar 20 and changing its rotation angle, the distribution of the tension applied to the strip 31 is changed, whereby the distribution of the amount of heat applied from the heating roll 33 to the strip 31 is changed. I have.

For example, when the side surface temperature of the band 31 is higher than the center surface temperature and the temperature difference becomes equal to or greater than a predetermined value, the control unit 50 is activated.
However, a command is output to the bar rotation motor 22 to rotate the curved spreader bar 20, and the rotation angle is changed in a direction to increase the tension at the central portion of the strip 31. In this manner, by driving the bar rotation motor 22 based on the command from the control unit 50, the water content distribution of the strip 31 can be controlled.

The control unit 50 controls the roll lifting motor 8
And the bar rotation motor 22 can be controlled independently of each other. The belt-shaped body heating device according to the second embodiment of the present invention is configured as described above, and thus operates as follows. That is, when the operation of the heating device is started, the sensor drive motor 6 is driven based on a command from the control unit 50, whereby the temperature sensors 1a,
1b move away from each other.

On the other hand, when both of the temperature sensors 1a and 1b reach the side of the strip 31 (that is, the distance from the origin position detected by the temperature sensor position detector 7 and 1/1 of the previously input paper width). 2 becomes zero), the sensor drive motor 6 starts reverse rotation based on a command from the control unit 50, and thereby the temperature sensors 1a, 1
b move in the direction approaching each other.

By repeating such an operation, the surface temperature of the band 31 is constantly measured by the temperature sensors 1a and 1b. When the temperature difference between the average temperature of the temperature sensor 1a and the average temperature of the temperature sensor 1b becomes equal to or more than a predetermined fixed value, the roll elevating motor 8 is driven based on a command from the control unit 50. As a result, the bearing 38 at one end of the outlet guide roll 34 moves upward or downward.

As a result, the tension in the width direction of the band 31 changes, the amount of heat applied from the heating roll 33 to the band 31 changes, and the temperature difference is corrected so as to disappear. On the other hand, the strip 31 measured by each of the temperature sensors 1a and 1b
When a difference occurs in the surface temperatures of the spreader bars 20, the bar rotation motor 22 is driven based on a command from the control unit 50, thereby changing the rotation angle of the curved spreader bar 20.

As a result, the distribution of the tension applied to the band 31 changes, the amount of heat applied from the heating roll 33 to the band 31 changes, and the temperature difference is corrected so as to be eliminated. For example, when the temperature at the end of the band 31 measured by the temperature sensor 1a is higher than the temperature at the center and the difference becomes equal to or more than a predetermined value set in advance, based on a command from the control unit 50, The bar rotation motor 22 is driven in a direction in which the tension at the center of the strip 31 increases, whereby the rotation angle of the curved spreader bar 20 changes. As a result, the distribution of the tension applied to the band 31 changes, the amount of heat applied from the heating roll 33 to the band 31 changes, and the temperature difference is corrected so as to disappear.

Here, the heat distribution when the roll lifting motor 8 and the bar rotation motor 22 are driven will be described. First, FIG. 6A shows the amount of heat when the roll lifting motor 8 is set to the origin position and the bar rotation motor 22 is driven to change the rotation angle of the spreader bar 20.

In FIG. 6 (a), the straight line (1) shows the amount of heat when the bar rotation motor 22 is driven and the spreader bar 20 is set at the origin position. Tension is applied, and the belt 31
Is kept uniform over the entire width.
In FIG. 6A, a curve (2) represents a bar rotation motor 2.
2 shows the amount of heat when the spreader bar 20 is moved to a rotation angle at which the tension at the center of the band 31 is maximized. In this case, the amount of heat given to the center of the band 31 is maximum. Become.

Further, in FIG. 6 (a), a curve (3) represents a calorie when the bar rotation motor 22 is driven and the spreader bar 20 is moved to a rotation angle at which the tension at the center of the strip 31 is minimized. In this case, the tension at the center of the strip 31 is minimized, and the amount of heat applied to the strip 31 is minimized. Note that by controlling the rotation angle of the spreader bar 20 to an appropriate rotation angle, it is possible to control the amount of heat to be an arbitrary value intermediate between the curves (2) and (3).

FIG. 6B shows the roll lifting motor 8.
Indicates the amount of heat when one shaft end 20b of the spreader bar 20 is lowered. In this case, the tension of one of the strips 31 increases, and the amount of heat applied to the strip 31 increases. Here, the amount of heat when the rotation angle of the spreader bar 20 is changed is represented by a straight line (1), a curve (2), and a curve (2) in FIG.
As shown in (3). Here, in FIG. 6B, the straight line (1) and the curves (2) and (3) are similar to the straight line (1), the curves (2) and (3) in FIG. When the bar rotation motor 22 is driven and the spreader bar 20 is set to the origin position, when the spreader bar 20 is moved to a rotation angle at which the tension at the center of the band 31 is maximized, the spreader bar 20 is moved to the band 31. Shows the amount of heat when the central portion is moved to a rotation angle at which the tension at the center becomes minimum.
In this case, the rotation angle of the spreader bar 20 is controlled independently.

FIG. 6C shows the roll lifting motor 8.
Indicates the amount of heat when one shaft end 20b of the spreader bar 20 is raised. In this case, the tension of one of the strips 31 decreases, and the amount of heat applied to the strip 31 decreases. Here, the amount of heat when the rotation angle of the spreader bar 20 is changed is represented by a straight line (1), a curve (2),
As shown in (3). Here, in FIG. 6C, the straight line (1) and the curves (2) and (3) are similar to the straight line (1) and the curves (2) and (3) in FIG. When the bar rotation motor 22 is driven to set the spreader bar 20 to the origin position, and when the spreader bar 20 is moved to a rotation angle at which the tension at the center of the band 31 is maximized, the spreader bar 20 is moved to the band 31. Shows the amount of heat when the central portion is moved to a rotation angle at which the tension at the center becomes minimum.
In this case, the rotation angle of the spreader bar 20 is controlled independently.

Therefore, according to the heating device for a strip according to the second embodiment, the surface temperature of the strip 31 is continuously measured by the temperature sensors 1a and 1b, and as a result, the respective temperature sensors 1a and 1b are measured. When a temperature difference equal to or more than a certain value occurs in the average temperature calculated from the surface temperature measured by the above-described method, the one end of the spreader bar 20 is raised and lowered by driving the roll lifting motor 8.
There is an advantage that the surface temperature in the width direction is more reliably made uniform.

For example, when manufacturing the corrugated cardboard sheet 30 by a corrugating machine, when there is a difference between the water content of the back liner 30a and the water content of the front liner 30c, or in the width direction of each of the back liner 30a and the front liner 30c. Even if the water content varies, the occurrence of warpage of the corrugated cardboard sheet 30 can be reliably prevented. When the temperature difference between the surface temperature of the side portion of the band 31 and the surface temperature of the central portion thereof becomes a certain value or more, the bar rotation motor 2
6 is driven independently of the roll elevating motor 8, to change the rotation angle of the spreader bar 20, as shown in FIG. Uniformity can be ensured more reliably. Thereby, the surface temperature of the band 31 can be controlled more variously, and the water content of the band 31 can be more reliably made uniform, so that the warpage of the product can be prevented and the product can be prevented from warping. There is an advantage that the reject rate can be greatly reduced.

For example, when the corrugated board 30 is manufactured by a corrugating machine, even if the water content of the back liner 30a and the front liner 30c is wavy and distributed in the width direction of the corrugated board 30, the bar rotation motor By driving the spreader 22, the spreader bar 20 can be rotated to reliably prevent the cardboard sheet 30 from warping.

In the heating apparatus for a strip according to each of the above-described embodiments, the two temperature sensors 1a and 1b are configured to be movable within a range where the width of the strip 31 is equally divided into two. However, the present invention is not limited to this, and a plurality of temperature sensors may be provided at positions where the width of the belt-shaped body 31 is equally divided, for example, so as to be movable within this range. In this case, for example, it is conceivable to raise and lower the exit guide roll based on the difference between the maximum value and the minimum value among the surface temperatures measured by the plurality of temperature sensors.

Further, in the heating device for a belt-shaped body according to each of the above-described embodiments, when the temperature difference between the respective surface temperatures measured by the plurality of temperature sensors 1a and 1b becomes equal to or more than a predetermined value, the outlet guide roll 34 is provided. Is raised and lowered, but the outlet guide roll 34 may be raised and lowered based on the temperature difference between the respective surface temperatures measured by the plurality of temperature sensors 1a and 1b.

In the heating apparatus for a strip according to each of the above-described embodiments, the plurality of temperature sensors 1a and 1b are configured to be movable within a range where the width of the strip 31 is equally divided.
Although the surface temperature of the strip 31 can be continuously measured, a plurality of temperature sensors 1a and 1b are juxtaposed so as to be able to measure at a fixed position along the width direction of the strip 31. May be. In this case, the roll elevating means raises and lowers the exit guide roll 34 when the temperature difference between the respective surface temperatures measured by the plurality of temperature sensors 1a and 1b becomes equal to or more than a certain value.

In the belt-shaped heating device according to each of the above-described embodiments, the control unit 50 controls the roll lifting / lowering means and the bar rotation motor 22 independently of each other. It may be controlled. In the belt-shaped body heating device according to the above-described second embodiment, the control unit 50 calculates the average temperature of each of the surface temperatures continuously measured by the plurality of temperature sensors 1a and 1b, and calculates the average temperature. When the difference exceeds a certain value, the roll elevating means is controlled, and the temperature difference between the side surface temperature and the center surface temperature of the strip 31 measured by the plurality of temperature sensors 1a and 1b is constant. The rotation angle of the spreader bar 20 is changed by the bar rotation motor 22 when the value becomes equal to or more than the value, but the rotation angle is not limited to this, and the control unit 50 measures the temperature by the plurality of temperature sensors 1a and 1b. The roll elevating means is controlled based on the deviation between the surface temperatures of the sensors, and the width of the surface temperature of the strip 31 measured by the plurality of temperature sensors 1a and 1b. Based on the direction deviation may be carried out to adjust the rotation angle of the spreader bar 20 through the bar rotation motor 22.

[0063]

As described above in detail, according to the apparatus for heating a strip according to the first aspect of the present invention, each of a plurality of temperature sensors measured in parallel along the width direction of the strip is used. The exit guide roll is automatically raised and lowered by the roll lifting and lowering means based on the temperature difference between the surface temperatures of the belts, and the surface temperature of the strip is made uniform. Thereby, the water content in the width direction of the strip can be easily and reliably made uniform. As a result, there is an advantage that the occurrence of warpage of the product can be prevented, and the defective product rate can be significantly reduced.

According to the second aspect of the present invention, the surface temperature of the strip is measured while moving the plurality of temperature sensors in the width direction of the strip, and each of the plurality of temperature sensors is measured. Thus, the control unit is controlled based on the inter-sensor deviation of the surface temperature independently measured, so that the surface temperature in the width direction of the strip is more reliably uniformed. Further, the control unit adjusts the rotation angle of the spreader bar through the bar rotation motor based on the width direction deviation of the surface temperature of the band measured by each of the plurality of temperature sensors. The surface temperature and the surface temperature at the central portion are reliably made uniform.

As a result, it is possible to control the surface temperature of the band more variously, and it is possible to more uniformly make the water content of the band 31 uniform, so that it is possible to prevent the product from warping. There is an advantage that the reject rate of a product can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a heating device for a belt-like body according to a first embodiment of the present invention, wherein FIG. 1 (a) is a cross-sectional view thereof, and FIG. 1 (b) is a plan view of FIG.

FIG. 2 is a schematic cross-sectional view illustrating a roll lifting / lowering device of an exit guide roll according to the first embodiment of the present invention.
It is the BB arrow sectional view of (b).

FIG. 3 is a block diagram illustrating control of the heating device for the belt-shaped body according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing a heating device for a belt-shaped body to which a spreader bar according to a second embodiment of the present invention is attached;
(A) is a sectional view thereof, and (b) is a plan view as viewed from an arrow A of (a).

FIG. 5 is a block diagram for explaining control of a heating device for a belt-shaped body to which a spreader bar according to a second embodiment of the present invention is attached.

FIG. 6 is a view showing a drying calorie curve in a heating device for a belt-shaped body using a spreader bar according to a second embodiment of the present invention, and (a) shows one of the spreader bars as an origin position by a roll elevating motor. (B) shows the amount of heat when one shaft end of the spreader bar is lowered by the roll elevating motor, and (c) shows the amount of heat when one shaft end of the spreader bar is raised by the roll elevating motor. ing.

FIG. 7 is a schematic view showing a corrugated cardboard sheet in a general warped state.

8A and 8B are schematic cross-sectional views illustrating a conventional belt-shaped body heating device, wherein FIG. 8A is a diagram illustrating a state in which the belt-shaped body is wound around a heating roll, and FIG. Winding angle θ
FIG.

9A and 9B are schematic views showing an exit guide roll in a conventional belt-shaped body heating device, wherein FIG. 9A is a schematic plan view thereof, and FIG. ) Is a schematic cross-sectional view showing the roll elevating device, and FIG.
It is arrow sectional drawing.

10A and 10B are diagrams showing the amount of heat applied by a conventional belt-shaped body heating device, wherein FIG. 10A shows the amount of heat when one of the outlet guide rolls is set to the origin position, and FIG. (C) shows the amount of heat when the shaft end is lowered, and (c) shows the amount of heat when one shaft end of the exit guide roll is raised.

[Explanation of symbols]

 1a, 1b Temperature sensor 2a, 2b Bearing 3 Screw shaft 4a, 4b Mounting seat 5 Guide bar 6 Sensor drive motor (sensor drive means) 7 Sensor position detector 8 Roll elevating motor (roll elevating means) 8a Sprocket (roll elevating means) 9 Chain (roll elevating means) 10 Oscillator (roll elevating means) 20 Spreader bar (outlet guide roll) 20a, 20b Shaft end 21 Flexible coupling 22 Bar rotation motor 23a Bearing 24 Bearing 30 Corrugated cardboard sheet 30a Back liner 30b Core paper 30c Table Liner 31 Strip 32 Inlet guide roll 33 Heating roll 34 Outlet guide roll 35a, 35b Shaft 36a, 36b Bearing 37 Bearing 38 Bearing (roll elevating means) 38a Groove 39 Rail (roll elevating means) 40a, 40b Over arm 41 screw seat (roll elevator means) 42 handle 43 screw shaft (roll lifting means) 43a upper portion 44 sprocket (roll lifting means) 50 control unit 51 roll lifting means

Claims (2)

[Claims] 1. A heating apparatus for a strip having an exit guide roll, a roll elevating means for elevating and lowering the exit guide roll, and juxtaposed along a width direction of the strip to measure a surface temperature of the strip. A plurality of temperature sensors, and the roll elevating means raises and lowers the exit guide roll based on a difference between surface temperature sensors measured by the plurality of temperature sensors. apparatus. 2. The outlet guide roll is constituted by a curved cylindrical spreader bar, and the plurality of temperature sensors can measure a surface temperature of the band while moving in a width direction of the band. A bar rotation motor that drives the spreader bar to rotate, and a control unit that independently controls the roll lifting / lowering means and the bar rotation motor, wherein the control unit measures by the plurality of temperature sensors. The roll elevating means is controlled based on the deviation of the surface temperatures between the sensors, and the bar rotation motor is passed through the bar rotation motor based on the width-direction deviation of the surface temperature of the strip measured by the plurality of temperature sensors. The belt-shaped body heating device according to claim 1, wherein the rotation angle of the spreader bar is adjusted.