JP3354176B2 - Continuous production equipment for corrugated sheet material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously producing corrugated sheet material, and more particularly to a mechanism for creasing an original sheet material.

[0002]

2. Description of the Related Art The applicant of the present invention has proposed a device for continuously producing a corrugated sheet material as disclosed in Japanese Patent Application Laid-Open No. 3-49928. This manufacturing apparatus includes a pair of upper and lower creasing spur gear rolls for inserting and creasing the raw sheet material before corrugation forming, and a pair of upper and lower creasing gears for guiding the raw sheet material sent out between the two spur gear rolls. And a corrugation forming mechanism having a guide wall. The manufacturing apparatus also includes a pair of upper and lower pressing rollers for pressing the original sheet material into the corrugating mechanism, and a pair of upper and lower corrugating rollers for feeding the raw sheet material from the corrugating mechanism. Furthermore, by making the feeding speed of the original sheet material by both the corrugating rollers lower than the pushing speed of the original sheet material by both the pushing rollers, the original sheet material with the folds formed is compressed into a waveform. I have.

[0003]

In the above-mentioned conventional continuous production apparatus for corrugated sheet material, since the pair of creasing gear rolls is a pair of spur gear-shaped gear rolls, a straight line parallel to the original sheet material is provided. Therefore, there is a problem that the flexural strength of the corrugated sheet material after compression molding into a corrugated shape is low.

[0004] It is an object of the present invention to improve the bending strength of a corrugated sheet material by forming folds formed in a direction perpendicular to the direction in which the original sheet material is transported in the step of forming folds on the original sheet material in a staggered manner. Another object of the present invention is to provide a continuous manufacturing apparatus for a corrugated sheet material that can manufacture a fold forming mechanism at low cost.

[0005]

In order to achieve the above object, the present invention provides an upper fold forming gear roll which is rotatably supported by a frame and meshes with each other to continuously feed while forming folds on an original sheet material. In a continuous production apparatus of a corrugated sheet material having a lower fold forming gear roll and a forming mechanism for forming an original sheet material on which a fold is formed into a corrugated shape, the upper fold forming gear roll and the lower fold forming gear roll are each axially moved. Each divided gear is formed into a helical gear, and the helical gears are combined so that their teeth alternately stagger in the longitudinal direction of the gear roll.

[0006]

According to the present invention, the upper and lower fold forming gear rolls are formed by connecting a plurality of bevel gears alternately in series so that the directivity directions of their teeth are staggered, so that the original sheet material is formed. While passing through both gear rolls, the fold itself in the direction perpendicular to the feed direction of the original sheet material can be formed in a staggered manner. For this reason, when the original sheet material is folded in the feed direction by the waveform forming mechanism and compressed while forming a cross-section viewed from a direction perpendicular to the feed direction while forming a corrugated shape,
Staggered ridges are formed on the surface of the corrugated sheet material based on the staggered folds. Therefore, the bending strength of the corrugated sheet material is improved.

Further, since the pair of fold forming gear rolls has a structure in which a plurality of two kinds of bevel gears having different tooth directions are alternately combined in series, manufacturing and assembling of the gear rolls are facilitated. be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 5, an original sheet material 1 used in this embodiment includes, for example, an original shape holding portion 2 made of a plate-like thermosetting spun bond and an original cushion portion 3 made of a plate-like acrylic fiber needle punched nonwoven fabric. And are superimposed.

As shown in FIG. 2, a fold forming mechanism 5 for forming a fold while unwinding the original sheet material 1 from a winding roll 4 around which the original sheet material 1 is wound, as shown in FIG. Are provided with side plates 7 on both left and right sides. Side plate 7
An upper fold forming gear roll 8 is rotatably supported by a support shaft 10 and a drive shaft 11 between upper end portions thereof, and a lower fold forming gear roll 9 is provided between central portions thereof. A pulley 12 is fixed to the left end of the drive shaft 11, and a belt 15 is mounted between the drive shaft 11 and a pulley 14 connected to an output shaft of a motor 13 installed on the upper surface of the frame 6 to rotate the drive shaft 11. It has become. Further, pulleys 16 and 17 are fitted and fixed to right ends of the drive shaft 11 and the support shaft 10, respectively.
A power transmission mechanism 18 that reverses the rotation direction is interposed between the pulleys 16 and 17. The upper fold forming gear roll 8 is synchronized with the rotation of the lower fold forming gear roll 9.
Are rotated in the direction of the arrow shown in FIG.

The two gear rolls 8 and 9 are constituted by connecting a plurality of bevel gears 19 and 20 in series.
9 and 20 are assembled so that every other tooth portion 19a and 20a have a different inclination direction, and are staggered as a whole in the longitudinal direction of the roll.

As shown in FIG. 2, a guide member 21 is disposed at the outlet side of the gear rolls 8 and 9 so as to guide the fold-formed original sheet material 1 to the corrugating mechanism 22 described below. Has become. The waveform forming mechanism 22 includes a pair of upper and lower pushing rollers 23 located on the entrance side, and a pair of upper and lower adjusting rollers 24 located on the exit side. An upper guide plate 25 and a lower guide plate 26 are arranged between the rollers 23 and 24 in parallel with each other. Then, the original sheet material 1 is fed by the two pressing rollers 23 at a speed higher than the sending speed of the adjusting roller 24, so that the original sheet material 1 is compression-formed into a corrugated shape by the fold 1a.

Next, the operation of the continuous production apparatus for a corrugated sheet material configured as described above will be described. While rotating the upper and lower gear rolls 8 and 9 of the fold forming mechanism 5 by the motor 13, the original sheet material 1 unwound from the winding roll 4 is fed between the two gear rolls 8 and 9. Then, from the tooth portions 19a, 20a provided on the bevel gears 19, 20 of the gear rolls 8, 9, the surface of the original sheet material 1 is
As shown in FIG. 4, the fold 1a is formed in the direction Q orthogonal to the feed direction P. At this time, the fold 1a is
It is formed in a staggered shape toward. In this step, since the gear rolls 8 and 9 are heated by the heating device, the fold 1a is reliably formed.

The original sheet material 1 on which the fold 1a is formed,
In FIG. 2, the toner is transferred from the guide member 21 to between the two pushing rollers 23 and sent between the two adjusting rollers 24. Then, in the gap between the upper and lower guide plates 25 and 26, the original sheet material 1 is compression-molded in the sheet feeding direction P in a wave shape as shown in FIG.
The corrugated sheet material 28 is formed. This corrugated sheet material 28
7, a staggered fold 28a is formed in the direction Q orthogonal to the transport direction P as shown in FIG. Therefore, the bending strength of the corrugated sheet material 28 is improved.

After the corrugated sheet material 28 thus formed is heated by the heating mechanism 27, a fixing sheet material 29 made of, for example, a polyester spunbonded nonwoven fabric is adhered and fixed by a laminating mechanism as shown in FIG. You.

In this embodiment, the tooth portions 19a, 19a,
Bevel gears 19, 20 each having an upper and lower gear rolls 8, 20a are alternately connected in series.
9 for easy production and assembly,
Cost can be reduced.

The present invention is not limited to the above embodiment, but can be embodied as follows. (1) As shown in FIG. 8, the left and right side edges of the corrugated sheet material 28 are pushed toward the center toward the downstream side in the feed direction so as to be located between the upper guide plates 25 and 26 on both sides thereof. Width changing plate 3 for reducing the width of corrugated sheet material 28
Arrange 1, 32. The base ends of the width changing plates 31 and 32 are rotatably supported by a shaft 33, and the ends of the width changing plates 31 and 32 can be horizontally adjusted by a position adjusting mechanism. As this position adjusting mechanism, for example, a bolt having a handle is rotatably supported at a predetermined position, and a nut fixed to the distal ends of the width change plates 31 and 32 is screwed to the bolt. Is also good.

In this embodiment, the folds 28 of the sheet material 28 are adjusted by adjusting the inclination angles of the width changing plates 31, 32.
The pitch of a can be changed. (2) In the above embodiment, the interval between the gear rolls 8 and 9 in the vertical direction is fixed. However, a mechanism for adjusting the interval is provided to change the pitch at which the folds 1a and 1a are formed. In this case, a guide bar (not shown) for supporting the original sheet material 1 is provided immediately before the two gear rolls 8 and 9.

[0018]

As described above in detail, according to the present invention, it is possible to form folds in a zigzag pattern in the direction perpendicular to the feed direction of the original sheet material. In addition, the bending strength can be improved. Further, the gear roll itself can be easily manufactured by alternately combining bevel gears having different tooth forming directions, and the fold forming mechanism can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing a fold forming mechanism.

FIG. 2 is a side view showing the entire continuous production apparatus for a corrugated sheet material.

FIG. 3 is a side view showing a gear roll of the fold forming mechanism.

FIG. 4 is a perspective view showing an original sheet material on which a fold is formed.

FIG. 5 is a sectional view showing an original sheet material before forming a fold;

FIG. 6 is a partially enlarged sectional view of a corrugated sheet material.

FIG. 7 is a perspective view of a corrugated sheet material.

FIG. 8 is a partial plan view showing another embodiment of the present invention.

[Explanation of symbols]

1 original sheet material, 1a fold, 5 fold formation mechanism,
8 (9) Upper (lower) fold forming gear roll, 19
(20) Bevel gear, 19a (20a) Tooth portion, 22
Corrugated forming mechanism, 28 corrugated sheet material, 28a fold.

Claims (1)

(57) [Claims] 1. An upper fold forming gear roll and a lower fold forming gear roll which are rotatably supported by a frame and are continuously meshed with each other to continuously feed while forming a fold, and an original sheet having a fold formed thereon. In a continuous production apparatus for a corrugated sheet material having a forming mechanism for forming a material into a corrugated shape, the upper fold forming gear roll and the lower fold forming gear roll are each divided into a plurality in the axial direction, and each divided gear is a bevel gear. An apparatus for continuously manufacturing corrugated sheet materials in which bevel gears are combined so that their teeth alternately stagger in the longitudinal direction of the gear roll.