JPH10235735A - Method and apparatus for manufacturing bamboo-like sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To work stripes and bamboo knotty unevennesses simultaneously at one process by a machine. SOLUTION: A corrugated sheet A formed continuously with a plurality of arcuate parts 3 shaped by imitating bamboo is passed through a roller compression machine 5 in order to be worked simultaneously with bamboo knotty unevennesses 7 and stripes at the same time by plural pairs of rollers comprising male rollers 10 and female rollers 11 provided on the roller compression machine 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a corrugated bamboo-like sheet used for constructing a bamboo fence or a sleeve fence as an alternative to natural bamboo.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a bamboo sheet, as disclosed in Japanese Patent Application Laid-Open No. 4-308734,
(B) Using a thermoplastic resin such as vinyl chloride, a corrugated sheet in which a plurality of bamboo-like arc-shaped portions are continuous in the width direction is extruded. There are known methods of forming a large number of streaks simulating the shape of a circle by embossing rolls, (c) press-forming uneven portions simulating bamboo nodes on the surface of each arc-shaped portion, and (d) finally cutting to a predetermined length. .

[0003]

However, according to this known method, the streaks and the bamboo-shaped uneven portions are separately processed by different processing machines, so that the number of manufacturing steps and processing equipment increases, and the cost increases. And the equipment became large, occupying a large space.

Accordingly, the present invention provides a method and an apparatus for manufacturing a bamboo-like sheet which can simultaneously process the streaks and the bamboo-like uneven portions by one machine in one step.

[0005]

According to a first aspect of the present invention, a corrugated sheet in which a plurality of arc-shaped portions imitating bamboo are continuously formed in a width direction is formed by forming a corrugated portion and a crease portion. By passing through a roll pressing machine composed of a plurality of roll pairs corresponding to the arc-shaped portion having Things.

The invention (manufacturing apparatus) according to a second aspect of the present invention includes a roll pressing machine through which a corrugated sheet in which a plurality of arc-shaped portions imitating bamboo are formed continuously in the width direction is passed. A plurality of roll pairs corresponding to the arc-shaped portion, each roll pair, a concave and convex processing portion forming a bamboo knot-shaped concave and convex portion, and a line processing portion for processing a line simulating a line pattern on the bamboo surface. Is provided.

According to a third aspect of the present invention, in the configuration of the second aspect, the concavo-convex portion is provided in such a manner as to mesh with the two rollers constituting the roll pair by rotation.

According to a fourth aspect of the present invention, in the configuration of the second or third aspect, both rolls of each roll pair are roll-rotated so that the circumferential positional relationship of the concavo-convex processing portion between adjacent roll pairs is variable. It is mounted so that its position can be changed in the circumferential direction with respect to the shaft.

According to a fifth aspect of the present invention, in the configuration of any one of the second to fourth aspects, a roll forming a pair of rolls is connected to a roll body having a processing member mounting hole and the processing member mounting hole of the main body. It is constituted by a processing member that is detachably attached by fitting, and the processing member is provided with an uneven processing portion.

According to a sixth aspect of the present invention, in the configuration of the fifth aspect, the processing member mounting holes are provided at a plurality of circumferential positions of the roll body.

[0011] According to the above method and apparatus, the streaks and the bamboo-like uneven portions can be simultaneously processed in one step by one machine (roll press machine).

In this case, the bamboo node-shaped uneven portion is processed by the uneven portion provided on both rolls constituting the roll pair. According to the configuration of the third aspect, the uneven portion is formed only by the uneven portion provided on one roll. As compared with the case of processing, the uneven portion can be formed sufficiently deep and clear.

According to the fourth aspect of the present invention, by changing the circumferential mounting position of the pair of rolls with respect to the rotation axis, the positional relationship between the concavo-convex portions between adjacent pairs of rolls can be changed.

Thus, it is possible to obtain a plurality of types of bamboo sheets having different arrangement patterns of the concave and convex portions by changing the positional relationship of the concave and convex portions between the adjacent arc portions.

[0015] On the other hand, according to the configuration of claim 5, when the uneven portion is set or damaged, not the whole roll but only the processed member can be replaced. For this reason, maintenance is easy, and maintenance costs such as replacement parts costs can be reduced.

Further, the shape and depth of the concave and convex portions can be varied by replacing the processing member.

Further, according to the configuration of claim 6, by changing the circumferential position and the number of the processing members, the pitch of the concave and convex portions processed into the arc-shaped portion can be changed.

The arrangement pattern of the concave and convex portions can be variously changed by the combination of the pitches of the concave and convex portions between the respective arc-shaped portions.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings.

First Embodiment (See FIGS. 1 to 7) FIG. 1 shows a manufacturing process of a bamboo sheet.

First, as a first step, a thermoplastic resin such as vinyl chloride is extruded from a corrugated sheet forming die 2 by an extruder 1 to form a plurality of arc-shaped portions 3 simulating bamboo as shown in FIG. A corrugated sheet A continuous in the width direction is formed.

Next, as a second step, the corrugated sheet A is cooled and solidified into a predetermined corrugated shape and a predetermined width by the cooling sizing device 4 (the temperature at this time is a temperature which does not hinder the processing in the third step). Do).

Then, in the third step, the corrugated sheet A
Is passed through a roll pressing machine 5 so that each of the arc-shaped portions 3 in the corrugated sheet A has a large number of thin and low streaks 6 simulating a streak pattern on the bamboo surface as shown in FIGS. The uneven portions 7 are simultaneously processed.

Thereafter, the sheet A is cut to a predetermined length by the cutting device 9 while the sheet A is being picked up by the picking device 8 to form a product sheet A '.

The roll press 5 will be described in detail.

As shown in FIGS. 3 and 4, the roll pressing machine 5 includes a male roll 10 having a convex curved surface in contact with the back surface of the arcuate portion 3 and a peripheral surface in contact with the surface of the arcuate portion 3. Are formed by a plurality of roll pairs including a female roll 11 having a concave curved surface.

The male rolls 10 of each roll pair are on a male roll rotation shaft 12, the female rolls 11 are on a female roll rotation shaft 13,
At positions corresponding to the arc-shaped portions 3..., They are mounted in a state where a sheet introduction gap is formed between their peripheral surfaces, and are synchronized by a rotary driving device using a common motor (not shown) as a driving source. It is driven to rotate in the direction.

On the peripheral surfaces of the male and female rolls 10 and 11 are provided, in the width direction, concave and convex portions 14 and 15 which are engaged only once with one rotation of the rolls. As shown in FIG.
Are formed one by one by one rotation of the roll pair.

Also, over the entire surface of the peripheral surface of the male roll 10 except for the uneven portion 14, ridges 16... Alternatively, a large number of convex streaks 6 are formed on the surface of each arc-shaped portion 3 by the ridges 16.

As shown in FIG. 3, the male and female rolls 10, 11 are removably attached to the rotating shafts 12, 13 by a key 17 and a key groove 18 in the axial direction, respectively. By changing the mounting position in the circumferential direction and re-attaching, the positional relationship of the bamboo-like uneven portions 7 between the arc-shaped portions 3 can be arbitrarily changed.

As described above, according to the bamboo sheet manufacturing apparatus, the surface of each arc-shaped portion 3 of the corrugated sheet A is
A large number of the streaks 6 and the bamboo-shaped uneven portions 7 can be simultaneously processed in one step by one roll pressing machine 5.

Therefore, the number of steps and processing equipment can be reduced, the manufacturing cost can be significantly reduced, the equipment can be downsized, and the space occupied by the equipment can be reduced.

Both male and female rolls 1 constituting a roll pair
In order to process the bamboo node-shaped uneven part 7 by the uneven processing parts 14 and 15 provided on both sides 0 and 11, for example, the female roll 11 is used.
The uneven portion 7 can be formed sufficiently deep and sharp as compared with the case where the bamboo-knot-shaped uneven portion 7 is processed only by the uneven portion 14 of the male roll 10 without providing the uneven portion 15.

Second Embodiment (see FIG. 8) In the following embodiment, only differences from the first embodiment will be described.

In the second embodiment, the roll press 5
The male and female rolls 10 and 11 that constitute the roller pair are constituted by roll bodies 19 and 20 and male and female processing members 21 and 22 as detachable dies, respectively.

The roll bodies 19 and 20 are provided with processing member mounting holes 19a and 20a at predetermined positions on the peripheral surface.
In a state where the workpieces 1 and 22 are fitted in the processing member mounting holes 19a and 20a, they are removably mounted by screws or the like (not shown).

The male and female working members 21 and 22 are provided with uneven portions 14 and 15 on the outer surface which is flush with the peripheral surface of the main body. The bamboo node-shaped uneven portion 7 is processed into the portion 3.

According to this embodiment, the concave / convex portion 14,
When the set 15 is damaged or damaged, only the processing members 21 and 22 can be replaced instead of the entire rolls 10 and 11. For this reason, maintenance is easy, and maintenance costs such as replacement parts costs can be reduced.

Also, a plurality of types of processing members 21 and 22 having different shapes and depths of the concavo-convex processing portions 14 and 15 are prepared, and by replacing these, the concavo-convex portion 7 is prepared.
Can have variations in the shape and depth.

Third Embodiment (See FIGS. 9 and 10) In the third embodiment, the process proceeds further from the second embodiment, and is provided at a plurality of positions on the peripheral surface of the roll bodies 19 and 20 (four positions at 90 ° intervals in the figure). Work member mounting holes 19a, 20a are provided, and the installation positions and numbers of the male and female working members 21, 22 can be arbitrarily selected and changed by the work member mounting holes 19a, 20a.

The processing member mounting holes 19a, 20a,.
Of the holes, the hole filling block 23 having no concave / convex processing portions 14 and 15 is attached to an empty hole where the processing members 21 and 22 cannot be attached.

According to the third embodiment, by changing the circumferential position and the number of the processing members 21 and 22 in each roll pair, the pitch of the bamboo node-shaped uneven portions 7 processed into the arc-shaped portions 3. Can be changed.

The uneven portions 7 between the arc-shaped portions 3...
The arrangement pattern of the irregularities 7 ... by the combination of pitches
Can be changed in various ways.

For example, when two processing members 21 and 22 are attached at an interval of 180 ° as shown in FIG. 9, the arrangement of the concavo-convex portions 7 per rotation of the roll is as shown in FIG. On the other hand, when the position and the number of the processing members 21 and 22 are changed, the state changes as shown in FIG.

Thus, bamboo-like sheets of various designs can be manufactured without uniformity.

In the above-described embodiment, the case where the convex streaks 6 are formed in the arc-shaped portion 3 by the protruding lines 16 provided on the male roll 10 of the roll pair is taken as an example. May be provided on the female roll 11 to form concave streaks, or the female roll 11 may be provided with concave streaks to form convex streaks.

[0047]

As described above, according to the present invention, the streaks and the bamboo-like uneven portions can be simultaneously processed in one step by one machine (roll press machine).

Therefore, the number of steps and processing equipment can be reduced, the cost can be significantly reduced, the equipment can be downsized, and the occupied space can be reduced.

In this case, the bamboo node-shaped uneven portion is processed by the uneven portion provided on both of the rolls constituting the roll pair. According to the invention of claim 3, the bamboo node is formed only by the uneven portion provided on one of the rolls. The uneven portion can be formed sufficiently deep and sharp as compared with the case where the uneven portion is processed.

According to the fourth aspect of the invention, by changing the circumferential mounting position of the roll pair with respect to the rotation axis, the positional relationship between the concavo-convex portions between adjacent roll pairs can be changed.

Thus, it is possible to obtain a plurality of types of bamboo-shaped sheets having different arrangement patterns of the uneven portions by changing the positional relationship of the uneven portions between adjacent arc-shaped portions.

On the other hand, according to the fifth aspect of the present invention, when the uneven portion is set or damaged, not the entire roll but only the processed member can be replaced. For this reason, maintenance is easy, and maintenance costs such as replacement parts costs can be reduced.

The shape and depth of the concave and convex portions can be varied by replacing the processing member.

Further, according to the invention of claim 6, by changing the circumferential position and the number of the processing members, it is possible to change the pitch of the concave-convex portions processed into the arc-shaped portion.

Further, the arrangement pattern of the concave and convex portions can be variously changed by combining the pitch of the concave and convex portions between the respective arc-shaped portions.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a corrugated sheet obtained by extrusion molding using the same device.

FIG. 3 is a side sectional view of a roll pressing machine in the apparatus.

FIG. 4 is a front view of a roll pressing machine.

FIG. 5 is a perspective view showing a state in which bamboo-knot-shaped uneven portions and streaks are processed by a roll pressing machine.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged sectional view taken along the line VII-VII of FIG. 5;

FIG. 8 is a side sectional view of a roll press according to a second embodiment of the present invention.

FIG. 9 is a side sectional view of a roll pressing machine according to a third embodiment of the present invention.

10 (a) shows the arrangement of bamboo-knot-shaped uneven portions by the roll pressing machine of FIG. 9, and (b) shows the arrangement of bamboo-knot-shaped uneven portions when the position and number of processed members are changed from the state of FIG. FIG.

[Explanation of symbols]

 A corrugated sheet 3 ... arc-shaped portion 6 streaks 7 bamboo node-shaped uneven portions 5 roll press machine 10 male rolls constituting a roll pair 11 same female rolls 12, 13 rotating shafts of both rolls 14 male roll unevenness portion 15 female roll Concavo-convex processing part 16 Ridge as a line processing part 19, 20 Roll body 19a, 20a of male roll Processing member mounting hole 21, 22 of roll body Processing member

Claims (6)

[Claims] 1. A corrugated sheet in which a plurality of arc-shaped portions imitating bamboo are formed continuously in the width direction, the corrugated sheet is formed of a plurality of roll pairs corresponding to the arc-shaped portions each having an uneven portion and a crease portion. A method of manufacturing a bamboo-like sheet, wherein a bamboo-knot-shaped uneven portion and a streak simulating a streak pattern on a bamboo surface are simultaneously formed on the surface of each of the arc-shaped portions by passing through a roll press. 2. A roll pressing machine through which a corrugated sheet in which a plurality of arc-shaped portions imitating bamboo are continuously formed in the width direction is passed, and the roll press is provided with a plurality of arc-shaped portions corresponding to the arc-shaped portions. Roll pairs, each roll pair is provided with a textured portion for forming a bamboo knot-shaped uneven portion, and a scored portion for machining a score simulating a score pattern on the bamboo surface. Bamboo sheet manufacturing equipment. 3. The bamboo sheet manufacturing apparatus according to claim 2, wherein the uneven portion is provided on both rollers constituting the roll pair in a state of being meshed by rotation. 4. The two rolls of each roll pair are mounted so as to be changeable in the circumferential direction with respect to the roll rotation axis so that the circumferential positional relationship of the concavo-convex processing portion between adjacent roll pairs is variable. The bamboo sheet manufacturing apparatus according to claim 2 or 3, wherein: 5. A roll forming a roll pair comprising a roll main body having a processing member mounting hole, and a processing member detachably mounted by fitting into the processing member mounting hole of the main body. The apparatus for manufacturing a bamboo-like sheet according to any one of claims 2 to 4, wherein the member is provided with an uneven portion. 6. The bamboo sheet manufacturing apparatus according to claim 5, wherein the processing member mounting holes are provided at a plurality of positions in the circumferential direction of the roll body.