JPS63262375A - Folding device for paper and the like - Google Patents

Abstract

PURPOSE:To prevent the generation of noise through smooth drive, by a method wherein a pair of gear groups in each of which a number of gear parts each having a square columnar through-hole at a center and formed by a resilient material are engaged with a square column are positioned facing each other. CONSTITUTION:Gear parts 14-21, each having a square through-hole 31, a semicylindrical groove 32, and a disc-shaped projected part 30, are formed by a resilient material, e.g. foamed polyurethane resin, foamed polyethylene resin, rubber, and are engaged with their respective square shafts 7 and B. Both side ends are secured by means of flanges 10 and 12, the gear parts 14-17 and 18-21, positioned facing each other, are engaged with each other for rotation. By feeding a continuous sheet paper 4 between the two gear groups as air is injected through the grooves 32, the sheet is folded, and the sheet is creased through the motion of piston rods 25 and 26 by means of pressurizing plates 23 and 24. A meandering sheet paper 29 cut by a cutter 27 is conveyed by a conveyor 28. This constitution enables smooth and drive of a folding device for a continuous folded type toilet paper without generating noise.

Description

[Detailed Description of the Invention] A toilet paper manufacturing apparatus in which continuous paper is folded in a zigzag pattern and surrounded by wrapping paper is disclosed in Japanese Patent Application No. 54-0.
No. 01113 and Japanese Patent Application No. 54-040452.

The former involves combining two gears that rotate in opposite directions, inserting continuous paper between them, and folding the paper in a zigzag pattern. 14 cm, with 7 teeth to the base of the teeth, one is rotated at a constant speed, one of the teeth is meshed with it, and when it is driven, the tips of the teeth of the main drive wheel will touch the base of the teeth of the driven wheel. When the driven wheel rotates rapidly, when the tooth tip of the main drive wheel is close to the tooth tip of the driven wheel, the rotation speed of the driven wheel slows down to about 1/2 of the previous case. The disadvantages are that it causes noticeable unevenness in rotation, generates noise, shortens the life of the device, and consumes a lot of energy.

Of course, if both gears are rotated uniformly, they will be damaged.

In the latter method, a large number of metal plates are attached around a shaft to form gears, and paper is sandwiched between the teeth of other gears in the gaps between the teeth of other gears. The former problem is solved by attaching an elastic object and causing the elastic object to deform, but the disadvantage is that the manufacturing cost of the gear, which has many metal plates attached to the shaft, is high.

The present invention eliminates these drawbacks, provides smooth operation,
The present invention relates to a manufacturing device for continuously folding toilet paper and similar products, which can be manufactured easily at low cost and can easily have other functions added thereto.

A description will be given below based on examples.

Figures 1 and 2 show an apparatus for producing continuously folded toilet paper using the folding gear of the present invention.

(1) is the vertical part of the control box that houses the motor, air compressor, air cylinder, electronic circuits, etc. (2) is the horizontal part. (3) is the rotating shaft that protrudes forward from the box (1). (4) is the continuous paper wrapped around it. (5)(6)
is the rotating shaft protruding from the box (1). (7) (8) is the axis (5
) A prismatic shaft connected to the front end of (6). (9)-(12)
are fitted into the shafts (7) and 8), and are fitted with screws (13), respectively.
) is fixed to the shaft with a flange. (14) to (21) are gear parts made of semi-hard urethane foam. (22) is a large number of air injection holes created between each gear. (23) and (24) are pressure plates with creases. (25) and (26) are the piston rods of the air cylinder in the box (2), and the pressure plate (23) is attached to the upper end.
(24) continues.

(27) is a cutter whose upper end is at the height of the shafts (7) and (8), forming a band shape, whose lower end is widened and fixed on the box (2), and whose upper end and left and right edges are provided with blades.

(2B) is a belt conveyor that can be moved back and forth, which is installed on the bottom of the long groove in the box (2).

The gear part (14) made of semi-rigid urethane foam is molded using a mold using a well-known manufacturing method, and the surface thereof is covered with a non-foamed skin layer. Its external shape is as shown in Figures 3 and 4, with a disc-shaped projection (30
) and a prismatic through hole (31) that passes through them front and back.
, and a semi-cylindrical groove (32) is provided on the front surface. Gear parts (15) to (21) were also molded using the same mold, and the front and back directions were alternately changed to form parts (14) to
Fit the hole (31) in (17) onto the shaft (7), sandwich it between flanges (9) and (10), fit (18) to (21) into the shaft (8), and flange (11) ( 12)
Use scissors to form two gears.

The two semi-cylindrical grooves (32) come together to form an air outlet (
22).

Although not shown, a cavity passes through the inside of the shaft (5), (6), (7), and (8), and its branch holes communicate with each air outlet, and the rear end of the cavity is connected to the shaft inside the box (1). (5) Opens at the rear end of (6),
Use an electromagnetic pen to approach the opening of the ventilation pipe leading to the compressed air source.

Next, this operation will be explained.

Due to the action of the motor in the control box (1), the shaft (5) continues to rotate clockwise and the shaft (6) counterclockwise at a constant speed. Therefore, the shaft (7), the gear consisting of the gear parts (14) to (17) fitted therein, and the shaft (8)
The gear consisting of the gear and the gear parts (18) to (21) fitted therein are also interlocked.

When the operator inserts the end of the base paper (4) between the two gears from above, the paper (4) is folded in a zigzag pattern and accumulates below between the two gears.

At that time, since the gear parts (14) to (21) are made of semi-rigid urethane foam, they will flex appropriately, and even if there is a difference in circumferential speed between the tooth tips and the tooth bases, the shafts (5) (6) ) can rotate at a constant speed, emit almost no noise, and consume little energy.

When the paper (4) sandwiched between both gears descends, the cutter (
27), and even if it gets stuck and moves away from the gear, it is guaranteed that it will be blown away from the left and right by the fireflies.

There are many air cylinders and their control circuits inside the control box (2), and the piston rods (25) and (26) move vertically and horizontally in parallel, and the tips of the pressure plates (23 and 24) are -
Perform the following movement to draw a rectangular shape of about 10 cm on each side to further strengthen the folds made gently between the gears, and feed the paper (4) downward.

When the air jet holes (22) of the gear parts (14) to (17) reach the right horizontal position due to the rotation of the shaft (5), the box (1)
), the axis (5)
Compressed air is sent through the lumens of and (7), and the holes (22)
Air is ejected between the folded sheets of paper, and the air continues to eject until the ejection hole (22), which spreads the paper vertically, reaches almost directly below the paper (27) stuck in the cutter (27). 4) is mainly subjected to downward force.

The pressure plate (23) moves to the right and enters the gap between the sheets of paper expanded by the air, and then the plate (23) descends and stops.

When this jet hole (22) reaches the lower left, the gear part (18
) to (21) reach the left horizontal position, and the shaft (6) (
Air is blown from inside the box (1) through 8), and the air continues until the nozzle reaches directly below, widening the gap between the sheets of paper (4),
The pressure plate (24) moves to the left and enters the gap, and then
The board (24) descends and inserts the zigzag-folded paper (4) between it and the board (23), creating strong creases.

Next, the board (23) moves to the left, rises, and returns to the position shown in the figure. When the holes (22) of the gear parts (14) to (17) come to the right horizontal position again and begin to blow out air, widening the gap between the sheets of paper, the plate (23) moves to the right again and descends. Insert the paper (4) between it and the board (24).

Then, the plate (24) moves to the right and rises, and the gear part (18)
) to (21) blow out air from the left horizontal position to directly below, and when the gap between the paper (4) is widened, the board (24) moves to the left again and then descends. .

Thereafter, the plates (23) and (24) repeat the same operation. (While the gear rotates several times, the plate (23) or (24) completes one cycle.) When the plate (23) or (24) descends, the paper stuck in the cutter (27) is also removed. descend,
The paper (29) is divided into front and back parts below the cutter (27).
It accumulates on the belt conveyor (28) like this.

Although not shown, when the plates (2, 3) and (24) are both descending, the horizontal cutter located to the left of the middle height of the cutter (27) moves to the right and moves the paper (4) up and down. Divide and plate (2
3) (24) continues to operate normally, and when the lower part of the dividing part is released from the restraints of the plates (23) and (24), the belt conveyor (2nd) moves and the person rides on it. The two groups of zigzag folded papers (29), front and rear, are sent out one after another to the front of the box (2).

Although not shown, an automatic packaging machine wraps the paper mass with a plastic bag or the like to obtain a finished product of continuously folded toilet paper.

The above operation continues, and similar products are produced one after another.

'The present invention relates to the shafts (7) and (8) and flanges (
9) to (12), gear parts made of semi-hard urethane foam (
14) to (21), etc., but various design changes are possible, and an outline thereof will be described below.

The gear parts (14) to (21) may be made of foamed polyethylene, soft vinyl chloride resin, rubber, or other elastic materials.

It is also possible to design the protrusion (30) to have an uneven surface on its end surface so that when the two end surfaces come into contact, the uneven surface of the two surfaces engages with each other.

To prevent wear and tear on the tooth tips of gear parts, metal 1 is applied only to the tips.
You can also cover it with a board. In that case, to prevent it from coming off, you may use adhesive or form many small protrusions on the edge of the metal plate.
All you have to do is embed it inside the gear parts.

Alternatively, each tooth tip is divided by the radial cutting surface, and the thickness is 1 m.
It is also possible to insert a flat metal plate with a diameter of about m and fix it with adhesive.

At that time, a perforated metal flat plate may be inserted into the tip of the tooth in the mold for molding, the foamed resin material may be pushed in, and the metal plate may be embedded in the foamed resin.

Apply adhesive to the outer surface of a square vibrator that can be placed over the shafts (7) and (8), and insert it into the through hole (31) of the gear part.
Glue the square vibrator and gear parts, and then attach the shafts (7) and (8).
If you fit it in, it can happen if you omit the square pipe.
This prevents the shafts (7) and (8) from rotating idly. (A large number of gear parts may be attached to a long square pipe and fitted into the shafts (7) and (8).) The cross section of the shafts (7) and (8) and the cross section of the through hole (31) are
It may be made into an equilateral triangle, star shape, etc., so that the axes (7), (8), 7, and (8) are less likely to spin freely.

A small through hole that vertically penetrates the groove (32) is provided at a position close to the through hole (31), and the flange (9) (11.)
A through hole leading to the small through hole is provided, the tip of the fixed nozzle extending from the box (1) is brought into contact with the flange, and compressed air is supplied from the compressed air source inside the box (1) through the air outlet hole through these through holes. It may also be sent to (22).

The number of teeth, tooth shape, size, etc. of gear parts can be arbitrarily selected.

In some cases, ten or more gear parts are fitted onto a long shaft (7) (8), and both ends are fixed with flanges.

At this time, the pitch can also be corrected by adjusting the distance between the flanges (9) and (10), inserting a correction spacer between each gear part, etc.

Using a gear-shaped punching die with the same external shape as the gear part (14), punch out a thick foamed resin flat plate to make a large number of gear parts, fit them onto the shafts (7) and (8), and attach flanges (9) at both ends.
~(12) may be fixed to form a gear. (groove(
32) may be formed by applying a baking iron, or the ejection hole (22) may be formed by drilling a hole. ) In this case, it is cheaper to manufacture than injection molding. However, after attaching it to the folding device, the cutter (
It is necessary to scrape off the foamed resin that comes into contact with 27).

In order to omit this cutting operation, a thin foamed resin flat plate is punched out, and a disc-shaped protrusion (31) with a through hole (31) is punched out.
30) may be made and inserted between the gear-shaped parts.

The air ejection holes (22) may be omitted in the gaps that allow wrinkles to be formed in the paper when the pressure plates (23, 24) enter the gaps in the paper (4).

Use plastic film or cloth instead of paper (4),
You can also use it when folding them into a zigzag pattern.

A cylindrical shaft connected to the bearing may be attached to the front end of the shaft (7) (8).

If the present invention is implemented, during use, even if the rotating shaft is rotated at a constant speed, less noise will be generated and less energy will be lost. A folding gear can be obtained that is used in a device that folds a wide continuous sheet of paper, etc. in a zigzag pattern.

In addition, the main parts of the gear can be manufactured in large numbers at low cost by making one small mold, so by using other parts and easily assembling them, it is possible to mass-produce large finished gears at low cost. There are some advantages to doing so.

[Brief explanation of drawings]

FIG. 1 is a plan view of a continuous paper folding device using a folding gear according to the present invention. Figure 2 is its front view. FIG. 3 is a front view of the gear part (14). Figure 4 is its plan view. FIG. 5 is a plan view of the pressure plates (23) and (24). Akihiro Fujimura

Claims (5)

[Claims] (1) Foamed polyurethane resin, foamed polyethylene resin,
Made of elastic materials such as soft vinyl chloride resin and rubber, a large number of gear-shaped gear parts with a prismatic through hole in the center are fitted into a prismatic shaft with a cylindrical rotating shaft attached to the end.
Folding gears are made by fitting flanges made of hard material into both ends of these gear parts and fixing both flanges to a prismatic shaft, which is used in devices for folding continuous long pieces of paper, etc. in a zigzag pattern. (2) The folding gear according to claim 1, characterized in that a small radius disc-shaped protrusion is provided on the end face of each gear part. (3) The folding gear according to claim 1, characterized in that the gear part is provided with air jet holes that open at the tips of the teeth of the gear part. (4) The folding gear according to claim 1, characterized in that a metal plate for preventing wear is attached to the tooth tips of the gear parts. (5) The folding gear according to claim 1, characterized in that a hard square pipe for preventing idle rotation is joined to the through hole in the center of the gear part, (6) The through hole in the center of the gear part And the cross-sectional shape of the shaft to be fitted into the through hole is triangular,
The folding gear according to claim 1, characterized in that it has a star shape or other shape.