JP2002113773A - Method for producing corrugated sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a corrugated sheet which can convey a sheet member stably and corrugate the sheet member easily while the elongation and breakage of the sheet member are prevented and an apparatus for the method. SOLUTION: In the method for producing the corrugated sheet 12 by locating the traveling sheet member 11 between a receiving side member 14 having a plurality of recessed parts 17 extending in a prescribed direction and a pushing member 15 which is engaged loosely with the recessed parts 17 and inserting the sheet member 11 into the recessed parts 17 to corrugate the sheet member 11, the sheet member 11 is inserted into the recessed parts 17 simultaneously, and the amount of the sheet member 11 inserted into the recessed parts 17 is increased gradually with the traveling of the sheet member 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a corrugated sheet formed by bending a sheet member into a corrugated form.

[0002]

2. Description of the Related Art As a device for manufacturing a corrugated sheet formed by bending a sheet member into a corrugated shape, for example, a device described in Japanese Patent Publication No. Hei 10-506333 is known. The device described in this publication is a flat plate-shaped guide head provided with a plurality of grooves running parallel to or inclined from each other, and a plurality of rod-shaped members loosely fitted along the plurality of grooves of the guide head. It is intended to form a large number of folded waves in the sheet member by sandwiching and passing the sheet member between the guide head and the pressing device.

However, in the above-described apparatus, the guide head and the holding device are fixed relatively to the sheet member, and the sheet member is pulled out in the conveying direction to move the guide head and the holding device between the guide head and the holding device. It will pass through the gap. Therefore, there is a problem that the sheet member cannot be stably conveyed while being bent in a waveform, for example, a large load is applied to the sheet member due to a frictional force or the like at the time of passage, causing the sheet member to expand or break. Such a problem becomes remarkable especially when the height of the wave is increased.

Accordingly, it is an object of the present invention to provide a method and an apparatus for manufacturing a corrugated sheet that can convey the sheet member in a stable state and can easily bend the sheet member into a corrugated form. It is another object of the present invention to provide a method and an apparatus for manufacturing a corrugated sheet that can easily bend a sheet member into a corrugated shape while preventing the sheet member from being stretched or broken.

[0005]

According to the present invention, there is provided a seat which travels in a direction in which the recess extends, between a receiving member having a plurality of recesses extending in a predetermined direction and a pushing member loosely fitted in the recess. A method of manufacturing a corrugated sheet by interposing a member, penetrating the sheet member into the concave portion, and bending the sheet member into a waveform, wherein the sheet member penetrates the plurality of concave portions almost simultaneously, By providing a method of manufacturing a corrugated sheet that gradually increases the amount of penetration of the sheet member into the recess as the sheet member travels,
The above object has been achieved.

According to the present invention, there is provided an apparatus for manufacturing a corrugated sheet including a receiving member having a plurality of concave portions extending in a predetermined direction and a pushing member loosely fitted in the concave portion. The disks are made up of receiving-side rotating rolls that are connected to each other at predetermined intervals at their centers, and the receiving-side rotating rolls have a maximum interval position at which the distance between the disks is maximum and a minimum at which the distance is minimum. An interval position, wherein the distance is gradually reduced from the maximum interval position to the minimum interval position, and the sheet member is moved along the peripheral surface of the receiving side rotating roll and the receiving side rotating roll and the pushing member. And a sheet member that is interposed between the disk and the sheet member that travels with the rotation of the receiving-side rotating roll penetrates into the concave portion formed between the disks to bend into a waveform. By providing the door of a manufacturing apparatus, in which to achieve the above object.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. Apparatus 1 for manufacturing a corrugated sheet according to the first embodiment of the present invention shown in FIG.
Numeral 0 is used to manufacture a corrugated sheet 12 by bending a sheet member 11 made of a nonwoven fabric into a corrugated shape as shown in FIG. 5, for example. According to the present embodiment, a flat base material sheet 13 made of, for example, a nonwoven fabric is joined to one of the uneven bottom surfaces (the surface connecting the bent portions of the waveform) of the manufactured corrugated sheet 12. A plurality of projections 29 composed of the sheet member 11 are held upright on the base sheet 13.

[0008] Corrugated sheet manufacturing apparatus 10 of the present embodiment
Has two rotating rolls as shown in FIG. One rotating roll is a receiving-side rotating roll 14 as a receiving-side member, and the other rotating roll is a pushing-in rotating roll 15 as a pushing-in member. Both rotating rolls are arranged such that their peripheral surfaces face each other.

The receiving-side rotary roll 14 is composed of a plurality of disks 16 having the same diameter and connected to each other at predetermined intervals at their centers. The diameter of the disk 16 is, for example, 100
It is about 200 mm. The number of the disks 16 is appropriately increased or decreased according to the corrugated sheet to be obtained. Each disk 16 is spaced apart from each other, with a large number of recesses 17, 17,.
It has become. The recess 17 extends along the circumferential direction of the receiving-side rotating roll 14.

Each disk 16 is provided with a flexible connecting member 1.
8 (see FIG. 2). In the present embodiment, a leaf spring is used as the connecting member 18. Thereby, the axis formed by connecting the centers of the disks 16, that is, the rotation axis of the receiving side rotation roll 14, can be bent.

On the outer surface of the disk 16 at both left and right sides of the receiving-side rotary roll 14, a rod-shaped support shaft 1 is provided at the center position.
9 and 19 are attached respectively. Each support shaft 19
Are loosely inserted into the support portions 20 each having a ball bearing. Each support 20 is mounted on a gantry 21. Further, the support shaft 19 is connected to a rotation driving means (not shown).

FIG. 2 shows the receiving-side rotating roll 14 in the apparatus shown in FIG. 1 as viewed from the direction indicated by arrow A in FIG. The two support portions 20 are erected from the gantry 21 so as to be parallel to each other, and are inclined outward so that the distance between the two gradually increases from an intermediate position. Each support shaft 19 is loosely inserted so as to be orthogonal to the support portion 20 at an inclined position in the support portion 20. As a result, the connecting member 18 connecting the disks 16 is bent, and the rotating shaft of the receiving-side rotating roll 14 is curved in a convex shape upward.

Since the rotating shaft of the receiving-side rotating roll 14 is convexly curved upward, as shown in FIG. 2, the space between the disks 16 of the receiving-side rotating roll 14 is deformed and expanded in a fan shape. . As a result, as the receiving-side rotating roll 14 rotates, the distance between the adjacent disks 16 changes, and the receiving-side rotating roll 14 has a maximum interval position 22 at which the distance between the disks 16 is maximum, and a disk 16. There is a minimum interval position 23 where the distance between them becomes minimum. The amount of change in the distance between the disks 16 as the receiving-side rotating roll 14 rotates is the same between the disks 16. That is, the distance between the disks 16 at the maximum interval position 22 is the same distance, and the distance between the disks 16 at the minimum interval position 23 is also the same distance.

As shown in FIG. 2, the maximum interval position 22 is
It is located at the top of the receiving-side rotating roll 14 and has the minimum spacing position 2
3 is located at the lowermost part of the receiving-side rotating roll 14, that is, at a position 180 ° opposite to the maximum spacing position 22. Then, from the maximum interval position 22 to the minimum interval position 23,
The distance between the disks 16 is gradually decreasing. The maximum distance D1 and the minimum distance D2 between the disks 16
Is adjusted according to the degree of curvature of the rotation axis. Maximum distance D
1 is, for example, about 5 to 40 mm, particularly about 8 to 30 mm, and the minimum distance D2 is, for example, 1 to 8 mm, particularly 2 to 5 m.
m.

As shown in FIGS. 1 and 2, between the disks 16, width adjusting members 24, 24,... Are inserted.
The width adjusting member 24 is used to keep the distance between the adjacent disks 16 equal. More specifically, as described above, the distance between the adjacent disks 16 changes with the rotation of the receiving-side rotating roll 14, and the amount of change at that time is determined by the adjacent disks 16.
The width adjusting member 24 is used for the purpose of making the distance equal. As a result, from the maximum interval position 22 to the minimum interval position 2
The distance gradually decreases while the distance between the adjacent disks 16 is kept equal during the period of 3. Each width adjusting member 24 in the present embodiment is formed of a round bar having the same diameter. Each width adjusting member 24 is inserted in a position near the maximum spacing position 22 in parallel with each other.

The push-in rotary roll 15 has the same configuration as the receiving-side rotary roll 14 described above. However, the above-described width adjusting member is not inserted between the disks 25 in the pushing rotary roll 15. Further, a slide mechanism (not shown) is provided on the support portion 26 that supports the push-in rotary roll 15. Thus, the push-in rotary roll 15 can move forward and backward in opposition to the receiving-side rotary roll 14. Each disk 25 of the pressing rotary roll 15 is provided with a disk 16 of the receiving rotary roll 14.
It is loosely fitted in the concave portion 17 formed between them.

As shown in FIG.
5 at a position intermediate between the maximum spacing position 22 and the minimum spacing position 23 on the receiving-side rotating roll 14 (hereinafter referred to as an intermediate spacing position 27).
It is loosely fitted between them. The amount of loose fit L between the disks 25 between the disks 16 is adjusted by the advance and retreat of the pressing rotary roll 15.

The amount of loose fit L in this embodiment is equal to or smaller than a value Lmax represented by the following equation. Lmax = [(D1-D2) / 2] .times. (. Theta./180) where D1 and D2 are as described above, and .theta. Is the line connecting the center of the disk 16 and the maximum spacing position 22 and the disk 16
Center and the pressing rotary roll 15 are the receiving rotary roll 1
4 represents an angle (°) formed by a line connecting the position to be loosely fitted to No. 4. In the present embodiment, the pressing rotary roll 15
Is loosely fitted to the receiving side rotation roll 14 at the intermediate interval position 27, so that θ = 90 °.

As shown in FIG. 3, the receiving-side rotating roll 14
Rotate in the direction toward the push-in roll 15, that is, in the direction indicated by the arrow B in FIG. On the other hand, the push-in rotary roll 15 rotates in a direction toward the receiving-side rotary roll 14, that is, in a direction indicated by an arrow C in the drawing (this direction is opposite to the rotation of the receiving-side rotary roll 14).

As shown in FIG. 3, the sheet member 11, which is a material of the corrugated sheet, runs along the peripheral surface of the receiving-side rotating roll 14 and in the same direction as the rotating direction of the receiving-side rotating roll 14. The sheet member 11 is fed into the receiving-side rotating roll 14 at the maximum spacing position 22 of the receiving-side rotating roll 14, and is received at the minimum spacing position 23.
It is sent out from. As a result, the amount of bending of the sheet member 11, that is, the protrusion 29 of the corrugated sheet 12
Can be maximized (see FIG. 5).

A method of manufacturing a corrugated sheet using the apparatus having the above configuration will be described. As described above, the receiving-side rotating roll 1 and the pushing-in rotating roll 15 rotating in the predetermined directions respectively.
4, the sheet member 11 is fed from the maximum interval position 22. The sheet member 11 extends along the peripheral surface of the receiving-side rotating roll 14, that is, the concave portion 17 of the receiving-side rotating roll 14.
It runs along the direction in which it extends. Push-in roll 1
In a state where the sheet member 11 has traveled to a position where the sheet member 11 loosely fits on the receiving-side rotating roll 14, the sheet member 11
It is interposed between the receiving side rotation roll 14 and the pushing rotation roll 15.

As described above, since the distance between the disks 16 of the receiving rotary roll 14 gradually decreases from the maximum interval position 22 to the minimum interval position 23, the sheet member 11 is rotated.
Is gradually bent between the adjacent disks 16 as the vehicle travels, and play occurs. Then, the sheet member 11
However, as described above, by being interposed between the receiving-side rotating roll 14 and the pushing-in rotating roll 15, the amount of bending thereof is
It will penetrate into the recessed part 17 of the receiving side rotation roll 14. This penetration occurs almost simultaneously in each recess 17. Thereby, the sheet member 11 is bent into a waveform.

When the traveling of the seat member 11 proceeds further,
As the distance between the disks 16 of the receiving side rotation roll 14 further decreases, the amount of deflection of the sheet member 11 further increases. Then, due to the increase in the amount of bending, the sheet member 1
1 further penetrates into the recess 17. As described above, in the present embodiment, as the seat member 11 travels, the amount of penetration of the sheet member 11 into the concave portion 17 gradually increases. Therefore, the sheet member 11 can be bent with almost no friction. Furthermore, by increasing the amount of curvature of the rotation axis of the receiving side rotation roll 14, the amount of penetration of the sheet member 11 into the recess 17, that is, the corrugated sheet 1
The height h (see FIG. 5) of the second projection 29 can be easily increased. In addition, the above-mentioned Japanese Translation of International Publication No. 10-5063
Unlike the technique described in JP-A-33-33, a plurality of bent portions can be formed in the sheet member 11 at one time, so that the production efficiency is extremely good.

The sheet member 11 bent by the above operation is sent out from the minimum large interval position 23 on the receiving-side rotating roll 14, and the corrugated sheet 12 as an object is obtained. Next, the corrugated sheet 12 is joined to the base sheet 13 by a predetermined means in a post-process (not shown) to form the form shown in FIG. The height h (see FIG. 5) of the protrusions 29 in the corrugated sheet 12 thus obtained is about の of the distance D1 between the disks 16 at the maximum interval position 22 of the receiving-side rotating roll 14. The distance p between the adjacent convex portions 29 (see FIG. 5) is the same as the distance D2 between the disks 16 at the minimum interval position 23 of the receiving-side rotating roll 14.

As described above, according to the present embodiment, when the sheet member 11 is bent into a waveform, little frictional force is applied thereto, and the corrugated sheet 12 can be formed in a stable state. Further, the sheet member 11 is not damaged such as elongation or tear.

According to the present embodiment, the manufacturing apparatus 10
Since both the receiving side member and the pushing member are constituted by rotating rolls, the installation area is small and compact.

Next, the second and third embodiments of the present invention will be described with reference to FIG. Regarding these embodiments, only the differences from the first embodiment will be described, and as for the points that are not particularly described, the detailed description of the first embodiment will be applied as appropriate. In FIG. 4, the same members as those in FIGS. 1 to 3 are denoted by the same reference numerals.

In the second embodiment shown in FIG. 4A, two push-in rotary rolls, ie, a first push-in rotary roll 15a and a second push-in rotary roll, are provided for one receiving-side rotary roll 14. 15b is used. The first pushing rotary roll 15 a is loosely fitted to the receiving-side rotary roll 14 at a position between the maximum interval position 22 and the intermediate interval position 27 on the receiving-side rotary roll 14. On the other hand, the second pushing rotary roll 15b is located at the intermediate interval position 2
At a position between the position 7 and the minimum interval position 23, it is loosely fitted to the receiving-side rotating roll 14. The amount of play L2 of the second push-in roll 15b is determined by the first push-in roll 15a.
Is larger than the loose fitting amount L1. With this configuration, the penetration of the sheet member 11 is further ensured.

In the third embodiment shown in FIG. 4B, a rod 28 having a gently curved portion is used as the pushing member instead of the pushing rotary roll. The number of the rod-like bodies 28 is equal to the number of the concave portions in the receiving-side rotating roll 14. According to this configuration, the device is simpler than in the case of using a pushing rotary roll as the pushing member.

The present invention is not limited to the above embodiment. For example, as a connecting member for connecting the disks 16 and 25,
The present invention is not limited to the above-described leaf spring, and various members capable of deforming the space between the disks into a fan shape can be used.

Instead of making each disk 16 the same diameter, the diameter of each disk may be adjusted so that the line connecting the edges of each disk forms a straight line (for example, in FIG. Since the disks 16 have the same diameter, the line connecting the edges of the disks 16 has an arc shape, but by adjusting the diameter of each disk, this may be a straight line).

Depending on the degree of flexibility of the connecting member 18, the distance between the disks 16 can be made equal even without using the width adjusting member 24.

Also, three or more pushing rotary rolls 15 may be used for one receiving rotary roll.

Further, the push-in rotary roll 15 need not be rotated.

[0035]

According to the present invention, the sheet member can be conveyed in a stable state, and the sheet member can be easily bent into a waveform while preventing the sheet member from being stretched or broken. Further, according to the present invention, it is possible to simultaneously form a large number of waveforms on the sheet member while preventing the sheet member from stretching or breaking.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a corrugated sheet manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is a view showing a state in which the apparatus receiving-side rotating roll shown in FIG. 1 is viewed from a direction A in FIG.

FIG. 3 is a diagram showing a state of the apparatus shown in FIG. 1 as viewed from a side.

FIGS. 4A and 4B are schematic diagrams of a corrugated sheet manufacturing apparatus according to second and third embodiments of the present invention, respectively.

FIG. 5 is a perspective view showing an example of a corrugated sheet manufactured according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Manufacturing apparatus 11 Sheet member 12 Corrugated sheet 13 Substrate sheet 14 Receiving-side rotating roll 15 Push-in rotating roll 16 Disk 17 Recess 18 Connecting member 22 Maximum spacing position 23 Minimum spacing position

Claims (5)

[Claims] 1. A sheet member running in a direction in which the concave portion extends is interposed between a receiving member having a plurality of concave portions extending in a predetermined direction and a pushing member loosely fitted in the concave portion. In the method of manufacturing a corrugated sheet formed by bending the sheet member into a corrugated shape by penetrating into the concave portion, the sheet member is penetrated into the plurality of concave portions almost simultaneously, and the sheet member travels along with the traveling. A method of manufacturing a corrugated sheet, wherein the amount of penetration of the sheet member into the concave portion is gradually increased. 2. A corrugated sheet manufacturing apparatus comprising: a receiving member having a plurality of concave portions extending in a predetermined direction; and a pushing member loosely fitted in the concave portion. The receiving-side rotating rolls are connected to each other at an interval, and the receiving-side rotating rolls have a maximum interval position at which the distance between the disks is maximum and a minimum interval position at which the distance is minimum. Has, the distance is gradually reduced from the maximum interval position to the minimum interval position, the sheet member, along the peripheral surface of the receiving side rotating roll,
Interposed between the receiving-side rotating roll and the pushing member, the sheet member traveling along with the rotation of the receiving-side rotating roll penetrates into the concave portion formed between the disks to form a waveform. A corrugated sheet manufacturing device that is bent. 3. The corrugated sheet according to claim 2, wherein the respective disks are connected to each other by a flexible connecting member, and a rotation axis of the receiving-side rotation roll connecting the centers of the disks is curved. Manufacturing equipment. 4. The apparatus according to claim 2, wherein a width adjusting member is inserted between the disks. 5. The corrugated sheet according to claim 2, wherein the sheet member is fed into the receiving side rotating roll at the maximum interval position and is sent out from the receiving side rotating roll at the minimum interval position. Manufacturing equipment.