JP2001038830A - Single facer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce equipment cost by eliminating a clutch device for engaging/ disengaging a drive device and a molding roll with each other and to enhance productivity by shortening a replacing time of the molding roll accompanied by the alteration of a production order. SOLUTION: In a single facer equipped with molding rolls 33, 34 for molding the core sheet 80 of a single-faced corrugated cardboard sheet 82 into a corrugated shape and an endless pressure belt 9 trained over belt rolls 3a, 3b and constituted so as to press the core sheet 80 molded into a corrugated shape by the molding rolls 33, 34 and the liner 81 supplied to the pressure belt 9 between one molding roll 33 and the pressure belt 9 to laminate them, one belt roll 3b is rotationally driven by a driver 5 and the molding rolls 33, 34 are rotationally driven by the rotary drive force of the pressure belt 9 through the pressure belt 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single facer used in a single-faced corrugated cardboard sheet manufacturing apparatus, and more particularly, to an endless pressure belt wound on a belt roll by driving the belt roll. The present invention relates to a single facer in which a pair of forming rolls (for example, an upper roll and a lower roll) are driven through the single facer.

[0002]

2. Description of the Related Art FIG. 9 shows a structure of a conventional general single facer for manufacturing a single-sided corrugated cardboard sheet. In this single facer, as shown in FIG. 9, a bogie 3 movable by wheels 30
1, a frame 32 is fixed, and central shafts 33a and 34a of a pair of forming rolls 33 and 34 are rotatably mounted on the frame 32. Here, the above-mentioned pair of forming rolls 33 and 34 are arranged and arranged at upper and lower positions, and are hereinafter referred to as an upper roll 33 and a lower roll 34. The upper roll 33 and the lower roll 34 are opposed to each other in the vertical direction, and are configured such that gear-shaped corrugated portions formed on their outer peripheral surfaces are rotated by meshing with each other. In addition,
Although not shown, the upper roll 33 and the lower roll 34
Is heated by steam or the like.

On the other hand, a pan 3 fixed to a frame (not shown)
The glue P is stored in 5, and the glue P is picked up by a gluing roll 36 rotated by another driving source (not shown), and a uniform glue film is formed on the surface of the gluing roll 36 by a doctor roll 37. It is supposed to be.

[0004] Belt rolls 38a and 38b are disposed above the upper roll 33, and an endless pressure belt 39 is wound between the belt rolls 38a and 38b while maintaining an appropriate tension. The pressure belt 39 travels while being constantly urged downward from above with respect to the upper roll 33. The bearings 40 at both shaft ends of one belt roll 38b are guided between a pair of guides 41a and 41b arranged on the upper side and the lower side, and have a structure capable of moving in the horizontal direction.
A pair of cylinders 42 is provided between the bearing 40 and a frame (not shown).
a, 42b are provided. Thus, according to the expansion and contraction of these cylinders 42a and 42b, the pressure belt 3
9 is controlled, and the pressure applied from the pressure belt 39 to the upper roll 33 is appropriately controlled to set the pressure to an optimal magnitude.

[0005] The driving mechanism of the single facer is constructed as follows. That is, as shown in FIG. 10, one shaft end of the center shaft 33a of the upper roll 33, a driving device 5 including a motor and a speed reducer (not shown).
1 are connected by a joint 52,
By rotating the upper roll 33, the lower roll 34 meshes and turns. Then, as the upper roll 33 is driven to rotate, the frictional force between the pressure belt 39 and the upper roll 33 causes
The pressure belt 39 and the belt rolls 38a and 38b are configured to be driven to rotate.

The above-described joint 52 has a spline structure, and the joint 52 and the end of the center shaft 32a of the upper roll 33 are spline-coupled to each other. Then, by moving the joint 52 to the drive device 51 side,
The spline provided at the end of the center shaft 33a of the upper roll 33 and the spline of the joint 52 are separated. As shown in FIG. 10, a hydraulically driven clutch device 53 is provided to disconnect or connect the joint 52 from the center shaft 33 a of the upper roll 33.
The clutch device 53 includes a connecting rod 56 rotatably mounted via a pin between the joint 52 and a seat 55 fixed to the mount 54, and a pin between an intermediate portion of the connecting rod 56 and the seat 55. A hydraulic cylinder 57 rotatably mounted via
And a hydraulic source (not shown) for supplying pressure oil to the hydraulic cylinder 57 and its piping. Thus, the joint 52 moves in the left-right direction due to expansion and contraction of the hydraulic cylinder 57, and the drive shaft 51a of the drive device 51 and the center shaft 33a of the upper roll 33 are connected or disconnected.

On the other hand, in order to control the meandering of the pressure belt 39, the following meandering control mechanism is employed. That is, as shown in FIG.
b rotatably supports the upper roll 3
3 is attached so as to be rotatable in a horizontal plane with respect to the central axis 33a. When the meander of the pressure belt 39 is detected by a meandering detector such as a photoelectric tube type (not shown), the frame 60 is rotated in a direction opposite to the direction in which the meander is desired to be corrected. As a result, as shown in FIG. 11, the thrust component F of the driving force due to the frictional force from the upper roll 33 acts on the pressure belt 39, and the meandering of the pressure belt 39 is corrected (adjusted).

FIG. 12 shows another meandering control mechanism for controlling meandering of the pressure belt 39. In the case of this meandering control mechanism, belt rolls 38a and 38 are used.
The adjustment roll 70 is disposed so as to slidably contact the pressure belt 39 wound (spread) between the rollers b in a pressurized state. More specifically, the adjusting roll 70 slides on the inner surface of the upper portion facing the lower portion of the pressure belt 39 slidably in contact with the upper roll 33 at an intermediate position between the belt rolls 38 a and 38 b. As a result, the upper portion of the pressure belt 39 is stretched over the adjustment roller 70 in a stretched state. As shown in FIGS. 12 and 13, one of the two bearings 71a and 71b of the adjusting roll 70 is fixed to a bracket 72 provided on a frame (not shown), and the other bearing 71a. Is
It is connected to a frame (not shown) via a cylinder 73. When the meandering detector (not shown) of the photoelectric tube type or the like detects the meandering of the pressure belt 39, one end of the adjusting roll 70 on the cylinder 73 side is moved in the horizontal direction by the expansion and contraction driving of the cylinder 73. To move it. As a result, the thrust component of the frictional force between the traveling pressure belt 39 and the adjusting roll 70 causes the pressure belt 3
The nine meanders are corrected (adjusted).

Next, the manufacturing process for manufacturing a single-faced cardboard sheet using such a conventional single facer will be described as follows. First, as shown in FIG. 9, the core 80 is continuously supplied from an unillustrated take-up roll to the meshing portion of the upper roll 33 and the lower roll 34, and as the core 80 passes through the meshing portion, a wave is applied to the core 80. A step of the shape is formed (see FIG. 14). Then, at the point of contact between the upper roll 33 and the sizing roll 36, the glue film (glue P) formed on the surface of the sizing roll 36 forms the step top 80 a of the core 80.
(See FIG. 14), and transferred to the top 80 a of the upper roll 33 while being heated from inside the upper roll 33. Here, a liner 81 that is continuously supplied from a winding roll (not shown) and travels along the pressure belt 39 and a step top portion 80a of the core 80 are bonded together with the glue P under a heated and pressed state. Thus, a single-sided corrugated cardboard sheet 82 having a sectional shape as shown in FIG. 14 is manufactured.

[0010] By the way, due to recent demands for various kinds of corrugated cardboard sheets, the necessity to produce single-side corrugated cardboard sheets 82 having different corrugated shapes in small lots has actually increased. Note that the size of the step shape is determined by the size of the waveform of the upper roll 33 and the lower roll 34. Therefore, when changing the size of the step shape, the upper roll 33 and the lower roll 34 having waveforms corresponding thereto are changed.
Need to be replaced frequently. For this reason, usually, in the outer setup, the upper roll 33 and the lower roll 34 that are to be used next time are assembled and prepared on the frame 32 of the movable carriage 31 in advance. Then, the operation is stopped at the same time as the end of the lot production, and the joint 52 connecting the upper roll 33 and the driving device 51 used up to that point is removed by operating the clutch device 53, and the upper roll 33 and The lower roll 34 and the carriage 31 are pulled out to the right side in FIG. 10, and the new upper roll 33 and lower roll 34 prepared in advance are replaced together with the carriage 31. Thereafter, the joint 52 is connected again to resume the operation. ing.

[0011]

However, in the conventional single facer as described above, the clutch device 53 is operated to detach (disconnect) the joint 52, and the upper roll 33 and the lower roll 34 are frequently replaced. Thus, it is possible to cope with high-mix / small-lot production, but the following problems have been pointed out. (1) The equipment cost of the hydraulic drive type clutch device 53 is expensive, which causes an increase in cost. (2) The time for disconnecting and connecting the joint 52 by the clutch device 53 when exchanging the upper roll 33 and the lower roll 34 increases the operation stoppage time, which is one of the factors for reducing productivity. In particular, the problem of a drop in productivity at a multi-product / small-lot production factory has become remarkable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to eliminate a clutch device for operating a drive device and a forming roll (for example, an upper roll). Belt drive system that can reduce the cost of equipment and shorten the time required to change forming rolls (for example, upper roll and lower roll) in response to a change in production order, thereby contributing to improved productivity. In providing a single facer.

[0013]

In order to achieve the above object, according to the present invention, a pair of forming rolls for forming a corrugated core of a single-faced corrugated cardboard sheet, and a pair of belt rolls wound between a pair of belt rolls. Each of the pair of forming rolls is provided with an endless pressing belt, and a core formed into a corrugation by the pair of forming rolls, and a liner supplied to the pressing belt are formed into one of the pair of forming rolls. In a single facer in which a pressure is applied between a roll and the pressure belt, one of the pair of belt rolls is rotationally driven by a driving device to rotate the pressure belt. While rotating, the pair of forming rolls are driven to rotate via the pressure belt. Also,
In the present invention, the other belt roll on the opposite side to the one belt roll that is rotationally driven by the driving device,
Position adjusting means for adjusting the position of the other belt roll with respect to the one belt roll is provided, and the tension of the pressure belt is adjusted by adjusting the position of the other belt roll with the position adjusting means. ing. Further, in the present invention, as the position adjusting means, a first cylinder which expands and contracts so as to adjust the interval between the pair of belt rolls is provided. In the present invention, a winding angle adjusting means for adjusting a winding angle of the pressure belt with respect to the one forming roll is provided. Further, in the present invention, as the wrapping angle adjusting means, a second cylinder which expands and contracts to adjust the relative position of the other forming roll with respect to at least one of the pair of belt rolls is provided. Like that. Further, in the present invention, a belt speed meter for measuring a running speed of the pressure belt and a roll speed meter for measuring a circumferential speed of the one forming roll are installed, and the belt speed meter and the roll speed meter are installed. If a difference is detected between the measured speeds, the winding angle is increased by expanding and contracting the second cylinder in proportion to the speed difference. Further, in the present invention, one of the pair of belt rolls is installed so as to be independently movable in a horizontal direction and a vertical direction, respectively, and the one belt roll is adjusted to adjust the tension of the pressure belt. And a Y-direction cylinder for moving the one belt roll in the vertical direction to adjust the winding angle of the pressure belt with respect to the one forming roll. The tension and the winding angle of the pressure belt are independently controlled. Further, in the present invention, a belt speedometer for measuring a traveling speed of the pressure belt and a roll peripheral speedometer for measuring a peripheral speed of the one forming roll are provided, and the belt speedometer pressure belt and the roll are provided. When a difference is detected between the speeds measured at the traveling speed of the peripheral speed meter, the winding angle is increased by expanding and contracting the Y-direction cylinder in proportion to the speed difference. I have. Further, in the present invention, the pair of belt rolls are connected to each other by spanning a timing belt between the pair of belt rolls, whereby the pair of belt rolls are driven to rotate at the same circumferential speed. I have. Further, in the present invention, by providing a pressing force applying means for applying a predetermined pressing force to the timing belt, by operating the pressing force applying means according to the change in the interval between the pair of belt rolls,
The timing belt is configured to keep the tension constant.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that in FIGS. 1 to 8, the same parts as those in FIGS. 9 to 14 are denoted by the same reference numerals, and redundant description will be omitted.

FIGS. 1 to 3 show a belt-driven single facer according to a first embodiment of the present invention.
As shown in FIGS. 1 to 3, central shafts 33 a and 34 of an upper roll 33 and a lower roll 34 (forming rolls 33 and 34).
a is rotatably supported by bearings 32 a and 32 b on a frame 32 fixed to a carriage 31 movable by wheels 30.

On the other hand, as shown in FIGS. 2 and 3, the main frames 1a, 1a,
1b is provided with bearings 2a and 2b, respectively, and a belt roll 3a is rotatably mounted on these bearings 2a and 2b. The belt roll 3a is installed at a position above the upper roll 33. Further, a driving device 5 composed of a motor and a speed reducer is installed on the mounting seat 4 fixed to the liner 81 supply side of the main frames 1a and 1b, and the driving device 5 and the central shaft 3c of the belt roll 3a are connected to each other. Are connected by a coupling 6.

As shown in FIG. 1, the center shaft 3d of the belt roll 3b is rotatably mounted on a bearing 40 at the outlet side of the single-sided corrugated cardboard sheet 82 of the main frames 1a and 1b. Is a pair of guides 41a,
41b, it is slidably supported along the horizontal direction. A cylinder (first cylinder) 8 is mounted on brackets 7a, 7b fixed to the main frames 1a, 1b.
a, 8b are mounted, and these cylinders 8a,
8b, a pair of guides 41
It is configured to be guided in a and 41b and move in the horizontal direction.

Further, an endless pressure belt 9 is wound between the above-mentioned belt rolls 3a and 3b, and the tension of the pressure belt 9 is controlled by expansion and contraction of the cylinders 8a and 8b. , From the pressure belt 9 to the upper roll 3
The pressing force applied to 3 is appropriately controlled. The other configuration is the same as that of the conventional single facer. When the driving device 5 drives the belt roll 3a, the single facer portion having the same configuration as the conventional one is operated by the same operation. It has become.

What is important here is that relative "slip" does not occur between the belt roll 3a and the pressure belt 9 and between the pressure belt 9 and the upper roll 33. That is. For that purpose, first, it is necessary to appropriately increase the roll diameter and the winding angle of the belt rolls 3a and 3b to increase the contact area with the pressure belt 9. Next, it is necessary to set the winding angle of the pressure belt 9 around the upper roll 33 to a moderately large angle to increase the contact area between them, thereby preventing "slip". The pressure belt 9 has high heat resistance, high tension,
A member having a high coefficient of friction is required, and therefore, examination of the material of the pressure belt 9 is important. In addition, as a material satisfying these requirements, for example, aramid fiber or the like can be given.

Next, the operation of the belt-driven single facer having such a configuration will be described. First, when one of the belt rolls 3a is rotationally driven by operating the driving device 5, the rotational traveling of the pressure belt 9 is started by the frictional force between the belt roll 3a and the pressure belt 9. You. Next, a frictional force acts between the pressure belt 9 and the upper roll 33 via a bonded body of the liner 81 and the core 80, and the upper roll 33 is driven to rotate based on the frictional force. The lower roll 34 meshing with the upper roll 33 is also meshed and rotated. At this time, a step is formed between the upper roll 33 and the lower roll 34 on the continuously supplied core 80. And
The step-formed core 80 is bonded at the top of the upper roll 33 to a liner 81 that is separately supplied continuously and travels along the pressure belt 9 to form a single-sided cardboard sheet 82 in the next step. Sent to

In this embodiment, the case where the driving device 5 is provided on the inlet side of the liner 81 has been described. In the case of this system, the bearings 2a and 2b of the belt roll 3a are fixed to the main frames 1a and 1b, respectively. And these bearings 2a, 2
Since the drive device 5 is connected to the center shaft 3c of the belt roll 3a rotatably supported at b, the relative parallelism between the belt roll 3a and the upper roll 33 can be ensured. . Moreover, the other belt roll 3b
Since the tension control of the pressure belt 9 and the prevention control of meandering are performed by the cylinders 8a and 8b on the side, fluctuations in the tension of the liner 81 and meandering of the pressure belt 9 caused by this can be reduced. Further, since only the coupling 6 for connection and fixing needs to be used as means for connecting the center shaft 3c of the belt roll 3a and the driving device 5, it is possible to reduce the cost of the equipment.

On the other hand, it is also possible to install the driving device 5 on the exit side of the single-sided corrugated cardboard sheet 82 (ie, on the side of the belt roll 3b). In this case, since the driving force of the driving device 5 acts in a direction to increase the tension of the pressure belt 9,
This is advantageous in the direction in which the driving of the upper roll 33 is increased. In adopting such a configuration, expensive parts such as a universal joint are required as connecting means between the drive shaft of the drive device 5 and the center shaft 3d of the belt roll 3b.

According to the belt-driven single facer according to the first embodiment of the present invention, as a means for connecting the drive device 5 and the upper roll 33 or for releasing the connection state, The clutch device 53 (see FIG. 10), which was arranged in the above, becomes unnecessary,
As a result, the cost of the equipment can be significantly reduced. In addition, since the operation for disconnecting and connecting the driving device 5 and the upper roll 33 by the joint 52 (see FIG. 10) as in the related art is not required, the upper roll 33 and the lower roll 34 are exchanged with the change of the production order. The time can be reduced, and the productivity can be improved when the single-faced corrugated cardboard sheet 82 is manufactured.

FIGS. 4 and 5 show a belt-driven single facer according to a second embodiment of the present invention. Note that the basic configuration and functions of this single facer are the same as those in the first embodiment described above, and therefore, only the differences from the first embodiment will be described below.

In the belt-driven single facer according to the second embodiment of the present invention, as shown in FIG. 4, pulleys are provided at the drive shaft ends of the central shafts 3c and 3d of the belt rolls 3a and 3b. 10a and 10b are provided, and the shaft end of the pulley 10a is connected by a coupling 6 to a driving device 5 composed of a motor and a speed reducer. As shown in FIG. 5, an intermediate pulley 1 is provided between the pulleys 10a and 10b.
1 is disposed, and the timing belt 12 is
0 a and 10 b are wound around the intermediate pulley 11. Thus, the belt rolls 3a and 3b and the timing belt 12 are configured to be driven at the same peripheral speed (moving speed) as the driving device 5 is driven.

The mounting seat 13 of the bearing 11a of the intermediate pulley 11 is supported by a hydraulic cylinder 14 or the like fixed to a stand (not shown) (see FIG. 5), and is maintained at a specified pressure. Accordingly, the tension of the timing belt 12 is always kept constant even when the distance between the axes of the belt rolls 3a, 3b fluctuates as the cylinders 8a, 8b expand and contract to control the tension of the pressure belt 9. You can do it.

In the case of the belt driven type single facer according to the second embodiment, the belt rolls 3a and 3b are driven in parallel by the timing belt 12, so that the pressure belt 9 and the belt rolls 3a and 3b are connected to each other. Can be substantially doubled. For this reason, a sufficiently large frictional force can be secured between the belt rolls 3a, 3b and the pressing belt 9, so that the belt rolls 3a, 3b can be increased without increasing the roll diameter of the belt rolls 3a, 3b. Belt drive can be realized.

FIGS. 6 to 8 show a belt-driven single facer according to a third embodiment of the present invention.
Note that the basic configuration and functions of this single facer are the same as those in the first embodiment described above, and therefore, only the differences from the first embodiment will be described below.

First, as shown in FIG. 6, an upper roll 33 and a lower roll 34 are rotatably supported by bearings 32a on a frame 32 fixed to a movable carriage 31, respectively. Are installed in a state where the waveforms of the peripheral surfaces of the two mesh with each other. On the other hand, main frames 15a and 15b are erected, and a pan 35, a gluing roll 36 and a doctor roll 37 are arranged on these main frames 15a and 15b. The gluing roll 36 is rotated by another drive source while being in contact with the upper roll 33.

A belt roll 3a is rotatably disposed on the main frame 15a, 15b on the inlet side of the liner 81, and a driving device 5 is mounted on a mounting seat 4 fixed to the main frames 15a, 15b. Have been. The driving device 5 is connected to the center shaft 3c of the belt roll 3a to rotationally drive the belt roll 3a. On the other hand, a belt roll 3b is arranged on the outlet side of the single-sided corrugated cardboard sheet 82, and a center shaft 3d of the belt roll 3b is rotatably supported by bearings 16a and 16b as shown in FIGS. Further, an endless pressure belt 9 is wound around these belt rolls 3a and 3b,
The upper belt 33 is pressed by the pressing belt 9.

A belt speedometer 17 for detecting the rotation speed of the belt roll 3a and measuring the running speed of the pressure belt 9 is attached to the output shaft of the drive device 5 (see FIG. 6). ). Also, the horizontal beam 18 of the main frame 15a
Detects the number of rotations of the upper roll 33,
A roll peripheral speed meter 19 for measuring the peripheral speed of the third roller is provided.

Further, as shown in FIG.
The housings a and 16b are fixed to a slider 20, and the slider 20 is slidably fitted to a guide 21. The X-direction cylinders (first cylinders) 22a, 22b are connected to the main frames 15a, 15b.
Brackets 23a and 23b fixed to the slider and slider 20
And the X-direction cylinders 22a, 22b
The belt roll 3b is configured to be able to move in the horizontal direction (X direction) by the guide action between the slider 20 and the guide 21 as the belt rolls 3 (see FIGS. 6 and 8).

On the other hand, as shown in FIGS.
A projection 24 is provided on the back surface of the main frame 1, and the projection 24 is slidably fitted in a groove 25 machined in a vertical direction (Y direction) on a part of the main frames 15 a and 15 b.
The guide 21 is a Y-direction cylinder (second cylinder)
The belt roll 3b is supported by the Y-direction cylinders 26a and 26b in the vertical direction (Y
(See FIG. 6 and FIG. 7).

According to the belt driven single facer according to the third embodiment, the X direction cylinders 22a, 22
By moving the belt roll 3b in the horizontal direction (X direction) in accordance with the expansion and contraction drive of b, the tension of the pressure belt 9 can be adjusted (adjustment control).
By moving the belt roll 3b in the vertical direction (Y direction) in response to the expansion and contraction driving of the direction cylinders 26a and 26b, the winding angle of the pressure belt 9 around the upper roll 33 can be changed. That is, the tension and the winding angle of the pressure belt can be controlled independently.

More specifically, the belt speedometer 1
If it is detected that there is a speed difference between the belt speed measured by the roller peripheral speed meter 19 and the roll peripheral speed meter 19, the Y-direction cylinder 26
a, 26b are operated, and the winding angle of the pressure belt 9 around the upper roll 33 is increased. As a result, the pressure belt 9
And the contact area between the upper roll 33 and the upper roll 33 is increased,
It is possible to prevent a relative "slip" from occurring between the two, so that the speed difference is eliminated. At this time, the hydraulic pressure of the X-direction cylinders 22a and 22b is constant, and the tension of the pressure belt 9 is kept constant.

Therefore, according to the belt-driven single facer according to the third embodiment, the tension of the pressure belt 9 and the winding angles of the belt roll 3b and the upper roll 33 can be controlled independently. A remarkable effect can be obtained as a slip measure when the upper roll 33 and the lower roll 34 are driven by a belt.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment.
Various modifications and changes are possible based on the technical concept of the present invention. For example, in the above-described first to third embodiments, the forming rolls 33 and 34 are arranged at the upper and lower positions to form the upper roll 33 and the lower roll 34, but the relative positions of the pair of forming rolls 33 and 34 are set. The arrangement position can be appropriately changed, and the present invention can be applied to any arrangement configuration. In the first to third embodiments, the belt roll 3a on the supply side of the liner 81 is used.
Is driven by the driving device 5, but the belt roll 3b on the outlet side of the single-sided corrugated cardboard sheet 82 may be driven by the driving device 5 to rotate.

[0038]

According to the first aspect of the present invention, there is provided a pair of forming rolls for forming a corrugated core of a single-faced corrugated cardboard sheet, and an endless pressure belt wound between a pair of belt rolls. Each of the cores, each having a corrugated shape formed by a pair of forming rolls, and a liner supplied to the pressure belt, are applied between one of the pair of forming rolls and the pressure belt. In a single facer that is pressed and bonded, one of the pair of belt rolls is rotationally driven by a driving device to rotate the pressing belt, and the pair of belt rolls are driven via the pressing belt. Since the forming roll is driven to rotate, there is no need to drive the forming roll, and the clutch device conventionally used to move the drive unit and the forming roll into and out of contact is eliminated. Can be, it is possible to reduce the cost of equipment. In addition, since the single facer has a simple configuration without the clutch device as described above, the time required to change the forming rolls due to the change in the production order can be shortened, which can contribute to an improvement in productivity.

According to a second aspect of the present invention, the position of the other belt roll relative to the one belt roll is adjusted to the other belt roll opposite to the one belt roll driven to rotate by the driving device. Is provided, and the tension of the pressure belt is adjusted by adjusting the position of the other belt roll by the position adjustment means. Therefore, the tension of the pressure belt is always set to a specified value. The operation of the single facer can be maintained satisfactorily.

Further, according to the present invention, the first cylinder is provided as the position adjusting means, which operates to expand and contract so as to adjust the interval between the pair of belt rolls. Although it is an inexpensive facility that only arranges cylinders that are simple parts that have only functions,
The tension adjustment of the pressure belt can be appropriately performed.

Further, according to the present invention, there is provided a winding angle adjusting means for adjusting a winding angle of the pressure belt to one of the forming rolls. By adjusting the attachment angle, it is possible to optimally set the pressure bonding region when bonding the core and the liner, and it is possible to manufacture a high-quality single-sided cardboard sheet.

According to a fifth aspect of the present invention, the winding angle adjusting means operates to extend and contract so as to adjust the relative position of the other forming roll with respect to one of the pair of belt rolls. Since the second cylinder is provided, it is possible to adjust the winding angle of the pressure belt (with the center core) while providing an inexpensive facility in which only a cylinder, which is a simple part having only a telescopic function, is provided. (Adjustment of the pressure bonding region at the time of bonding with the liner) can be appropriately performed.

According to a sixth aspect of the present invention, there is provided a belt speedometer for measuring a traveling speed of a pressure belt and a roll peripheral speedometer for measuring a peripheral speed of one forming roll. If a difference is detected between the speeds measured by the speed meter and the roll peripheral speed meter, the second
Since the winding angle is increased by expanding and contracting the cylinders, there is a speed difference between the belt speed measured by the belt speed meter and the roll circumferential speed meter and the roll circumferential speed. As it is detected,
The wrapping angle of the pressure belt is increased, and the contact area between the pressure belt and the forming roll is increased,
As a result, it is possible to prevent a relative “slip” from occurring between the two.

According to a seventh aspect of the present invention, one of the pair of belt rolls is provided so as to be independently movable in a horizontal direction and a vertical direction, respectively.
An X-direction cylinder that moves one belt roll in the horizontal direction to adjust the tension of the pressure belt, and moves one belt roll in the vertical direction to adjust the winding angle of the pressure belt around one forming roll Y-cylinders are provided, respectively, so that the tension and the wrapping angle of the pressure belt are controlled independently of each other. The winding angle of the pressure belt can be controlled independently of each other, and a remarkable effect can be obtained as a slip measure when a pair of forming rolls are driven by the pressure belt.

According to the present invention, a belt speedometer for measuring the running speed of the pressure belt and a roll speedometer for measuring the peripheral speed of one of the forming rolls are provided. If a difference is detected between the speed measured by the meter press belt and the running speed of the roll peripheral speed meter, the Y-direction cylinder is operated in proportion to the speed difference to press the forming roll. Since the winding angle of the belt is increased, the contact area between the pressing belt and the forming roll can be increased in accordance with the occurrence of the above-mentioned speed difference. It is possible to prevent a relative "slip" from occurring between them (at this time, it works so as to eliminate the speed difference). Furthermore, in this case,
The tension of the pressure belt can be kept constant by the expansion and contraction operation of the X-direction cylinder.

According to a ninth aspect of the present invention, a pair of belt rolls are connected to each other by laying a timing belt between the pair of belt rolls. Since the rotation is driven, the pair of belt rolls are driven to rotate in parallel by the timing belt, so that the contact area between the pair of belt rolls and the pressure belt is substantially doubled. As a result, a sufficiently large frictional force can be secured between the pair of belt rolls and the pressure belt. As a result, belt drive of the belt roll can be realized without increasing the roll diameter of the belt roll.

According to a tenth aspect of the present invention, there is provided a pressing force applying means for applying a predetermined pressing force to the timing belt, and the pressing force applying means is provided in accordance with a change in the interval between the pair of belt rolls. Is operated to keep the tension of the timing belt constant, so that even when the distance between the axes of the pair of belt rolls fluctuates when controlling the tension of the pressure belt, the timing belt is controlled. Can always be kept constant.

[Brief description of the drawings]

FIG. 1 is a front view showing a belt-driven single facer according to a first embodiment of the present invention.

FIG. 2 is a plan view of the single facer shown in FIG. 1;

FIG. 3 is a side view of the single facer shown in FIG. 1;

FIG. 4 is a plan view showing a belt-driven single facer according to a second embodiment of the present invention, showing a state in which a pair of belt rolls are driven in parallel.

FIG. 5 is a view taken along the line AA in FIG. 4;

FIG. 6 shows a belt-driven single facer according to the first embodiment of the present invention, in which winding angle adjusting means for adjusting the winding angle of the pressure belt around the forming roll is provided. It is a front view of the provided single facer.

FIG. 7 is a sectional view taken along line BB in FIG. 6;

FIG. 8 is a cross-sectional view taken along the line CC in FIG. 7;

FIG. 9 is a front view of a conventional single facer used in a single-sided cardboard sheet manufacturing apparatus.

FIG. 10 is a view taken along line DD in FIG. 9;

11 is a plan view of the single facer shown in FIG. 9 for explaining an operation when controlling meandering of the pressure belt.

FIG. 12 is a front view showing a pressure belt meandering control mechanism different from the pressure belt meandering control mechanism shown in FIG. 11;

FIG. 13 is a plan view seen from the direction of arrow α in FIG.

FIG. 14 is a cross-sectional view of a single-sided corrugated cardboard sheet manufactured by the single facer described above.

[Explanation of symbols]

 1a, 1b Main frame 2a, 2b Bearing 3a, 3b Belt roll 3c, 3d Center shaft 5 Drive 8a, 8b Cylinder (first cylinder) 9 Pressure belt 10a, 10b Pulley 11 Intermediate pulley 12 Timing belt 14 Hydraulic cylinder 15a , 15b Main frame 16a, 16b Bearing 17 Belt speed meter 19 Roll peripheral speed meter 20 Slider 21 Guide 22a, 22b X direction cylinder (first cylinder) 26a, 26b Y direction cylinder (second cylinder) 31 Bogie 32 Frame 32a , 32b bearing 33 upper roll (one forming roll) 33a center shaft 34 lower roll (the other forming roll) 34a center shaft 80 core 81 liner 82 one-sided corrugated cardboard sheet

Claims (10)

[Claims] 1. A pair of forming rolls for forming a corrugated core of a single-sided corrugated cardboard sheet, and an endless pressure belt wound between a pair of belt rolls. The corrugated core and the liner supplied to the pressing belt are pressed and bonded between one of the pair of forming rolls and the pressing belt. In the single facer, the one of the pair of belt rolls is rotationally driven by a driving device to rotate the pressure belt, and the pair of forming rolls are rotated via the pressure belt. The single facer is characterized by being driven to rotate. 2. A position adjusting means for adjusting the position of the other belt roll with respect to the one belt roll is provided on the other belt roll opposite to the one belt roll driven to rotate by the driving device. 2. The single facer according to claim 1, wherein the position adjusting means adjusts the position of the other belt roll to adjust the tension of the pressure belt. 3. A first expansion / contraction device as the position adjusting means, which expands and contracts so as to adjust an interval between the pair of belt rolls.
The single facer according to claim 2, wherein a cylinder is provided. 4. The single facer according to claim 1, further comprising a winding angle adjusting means for adjusting a winding angle of the pressure belt with respect to the one forming roll. 5. A second cylinder which expands and contracts so as to adjust the relative position of the other forming roll with respect to one of the pair of belt rolls as the winding angle adjusting means. 5. The method according to claim 4, wherein
Single facer described in. 6. A belt speedometer for measuring a running speed of the pressure belt and a roll speedometer for measuring a circumferential speed of the one forming roll, wherein the belt speedometer and the roll speedometer are provided. When a difference is detected between the measured speeds, the winding angle is increased by expanding and contracting the second cylinder in proportion to the speed difference. A single facer according to claim 5. 7. One of the pair of belt rolls is provided so as to be independently movable in a horizontal direction and a vertical direction, and the one belt roll is adjusted to adjust the tension of the pressure belt. An X-direction cylinder for moving in the horizontal direction, and a Y-direction cylinder for moving the one belt roll in the vertical direction to adjust the winding angle of the pressure belt with respect to the one forming roll are provided. The single facer according to claim 1, wherein the tension and the winding angle of the pressure belt are independently controlled. 8. A belt speedometer for measuring a running speed of the pressure belt and a roll speedometer for measuring a circumferential speed of the one forming roll, wherein the belt speedometer and the roll speedometer are provided. When a difference is detected between the measured speeds, the winding angle is increased by expanding and contracting the Y-direction cylinder in proportion to the speed difference. Item 14. A single facer according to item 7. 9. The pair of belt rolls are connected to each other by spanning a timing belt between the pair of belt rolls, whereby the pair of belt rolls are driven to rotate at the same peripheral speed. The single facer according to any one of claims 1 to 8, characterized in that: 10. A pressure applying means for applying a predetermined pressure to the timing belt, and the pressure applying means is actuated in accordance with a change in the interval between the pair of belt rolls. 10. The timing belt according to claim 9, wherein the tension is kept constant.
Single facer described in.