JPS5824255B2 - Folded straw manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-speed continuous manufacturing apparatus for a flexible plastic draw having a large number of pleats having different lengths on both sides.

Plastic drawstrings (hereinafter referred to as pleated plastic drawers) have a non-resilient nature by arranging multiple pleats with different lengths on both sides of the neck. It is widely used because it does not rebound even when bent.

Various manufacturing apparatuses have also been proposed (for example, Japanese Utility Model Publication No. 52-35988).

However, despite the growing demand for pleated plastic drawers, no equipment has been seen to date that can continuously produce large quantities, resulting in low production efficiency and, therefore, high product costs.

The present invention employs a rotating drum system and develops various new mechanisms, thereby making it possible to continuously produce several 200 pleated plastic draws per minute.

The manufacturing apparatus of the present invention will be explained below with reference to the drawings.

The drawings are illustrative of the present invention, and FIG. 1 shows a front view thereof.

FIG. 2 is an enlarged sectional view of the main part taken along the line AA in FIG. 1.

As is clear from these drawings, the structure of the manufacturing apparatus according to the present invention is briefly explained. A hopper is provided at the top of the apparatus for supplying a raw material straw pipe, and a hopper is provided at the bottom of the apparatus for supplying raw material straw pipes. A pipe supply drum and a forming rod holding drum are provided coaxially and rotatably facing each other.

A large number of forming rods are held in the forming rod holding drum, and the straw pipe supplied from the pipe supply drum into the extrusion rod sliding groove is inserted onto the forming rod by the extrusion rod, and is placed near the center of the device. After being moved to the provided molding section and molded, it is discharged from the opposite side by a discharge rod.

Each component will be explained in detail below.

At the top of the device there is a hopper 3 fixed to the base 1 and containing a raw straw pipe 2.

A supply guide 4 is provided at the bottom of the hopper 3.
The feed guide rollers 5, 5 on both sides thereof are rotated via the chain 7 by the rotation of the straw feed motor 6 to arrange the straw pipes 2 in the feed guide 4.

A pipe supply drum 8 is fixed to a main shaft 9 at the lower part of the supply guide 4 of the hopper 3, and a molding section gutter holding drum 10 is similarly fixed to the other end of the main shaft 9 so as to face each other.

The main shaft 9 has bearings 11a and 11 fixed on both sides of the base 1.
b, and is rotatably supported by the rotation of the motor 12.

The main shaft sprocket 15 provided at the end of the main shaft 9 rotates via the reducer 13 and the chain 14, causing the main shaft 9 to rotate, thereby rotating the pipe supply drum 8 and the forming rod holding drum 10.

The pipe supply drum 8 has a large number of presses on its circumference.

Extrusion rod sliding grooves 16 are provided, and the raw straw pipe 2 in the aforementioned hopper is introduced into each extrusion rod sliding groove 16 through the feed guide 4.

An extrusion rod 17 that slides left and right is provided in the extrusion rod sliding groove 16, and is used for pipe supply.

When the ram 8 rotates, a bottle 18 provided at the end of the extrusion rod 17 and protruding toward the outer circumference slides onto a supply extrusion kite 19 fixed to the base 1, thereby moving the extrusion rod left and right. There is.

Therefore, when the straw pipe 2 is supplied to the extrusion throat sliding groove 16 at the top of the pipe supply drum 8, the extrusion rod 17 moves from the right to the left in FIG. 1 as the pipe supply drum 8 rotates. The straw pipe 2 also moves from right to left in the direction of the forming rod 20, which will be described later, due to the pushing force of the tip of the extrusion rod 17.

Move in the direction.

A large number of forming rods 20, the same number as the extrusion land sliding grooves, are rotatably provided in the cylindrical wall of the forming rod holding drum 10, which rotates on the same main shaft 9 as the pipe supply drum 8, over its entire circumference. As mentioned above.

The straw pipe 2 is inserted into the forming rod 20 extending outside the forming rod holding drum 10 while being pushed by the tip of the extrusion rod 17.

A large number of molding grooves 22 are arranged in series at predetermined positions on the outer periphery of the molding rod 20 to form pleats for the neck of the flexible plastic strum.

When the pipe supply drum 8 and the opposing forming rod holding drum 10 have rotated approximately one-fourth of a revolution, the straw pipe 2 is inserted into and held at a predetermined position on the forming rod 20.

Here, the molded portion for forming the pleats of the pleated straw will be explained.

3 is a side view of the molding section shown in FIG. 1, FIG. 4 is a top view of the main part of the same portion, and FIG. 5 is an enlarged sectional view of section C in FIG. 4.

Furthermore, FIG. 6 is an enlarged left side view of section B in FIG. 1.

As mentioned above, the forming section 23 is for applying pleats to the unprocessed straw pipe, and the forming section 23 forms the pleats simply by mechanical pressing force without heating.

For this purpose, as is clear from FIGS. 3 to 5, a forming roller 25 provided with a large number of protrusions 24 that fit into the forming grooves of the forming rod 20 is placed upright with respect to the base 1 on the inner side of the movement radius of the forming rod 20. When the forming rod 20 and the straw pipe attached thereto reach the position of the forming roller 25, a pressing force is applied by a spring 27 similarly fixed to the base 1. It is sandwiched between the presser rubber rollers 28 provided.

As shown in FIGS. 1 and 6, a small pulley 29 is attached to the left end of the forming rod 20, and a reducer 13 and a chain are connected to each other by a motor 12 as a drive source inside the movement radius of the forming rod 20. A dog pulley 30 is provided which rotates via a roller 31, and when the forming rod 20 rotates to the position of the forming roller 25, the small pulley 29 and the large pulley 30 come into contact and the forming rod 20 rotates at high speed. The straw pipe is pressed and rolled between the forming groove 22 and the convex strip of the forming roller 25, and a neck having a concave and convex shape is formed.

In order to enable such high-speed forming, the forming grooves 22 of the forming rod 20 should have regular flat parts as shown in FIG.
If the ridge 24 has a special cross-sectional shape with a ridge 21, the shaped rod 2
0 can be moved in the longitudinal direction of the straw, and the shape of the straw can be changed without replacing either the forming rod or the forming roller.Moreover, the forming roller 25 can be used regardless of the tube diameter of the straw. By pressing a straw with unevenness on the neck in the longitudinal direction, a straw can be easily formed, so that the purpose can be achieved.

Furthermore, a forming rod holding drum 10 and a pipe supply drum 8
As the molding rod rotates, the molding rod moves into the molding part 23 while holding the straw pipe with the uneven neck.
escape from

FIG. 9 shows an explanatory diagram of the various processes for the rotational position of the forming rod holding drum. In area a, from the receiving of the straw pipe to the forming rod 20 described above, to the uneven shape that becomes the folds on the straw pipe. The process leading up to the provision of is performed.

Subsequently, when the forming rod holding drum 10 and the pipe supply drum 8 further rotate and enter the region b, the straw pipe is pressed and a flap begins to be formed on the uneven neck.

The straw pipe is placed in the first
A pipe compression and discharge rod 32 that presses from the left to the right in the figure is provided on the outer periphery of the molding head holding drum 10 and slidably on each molding rod 20.

This will be explained in detail with reference to FIG. 6, FIG. 7 which is an enlarged front view of section B in FIG. 1, and FIG. 8 which is an enlarged perspective view of the tip of the pipe compression and discharge rod 32.

Each forming rod 20 is mounted on the outer periphery of the forming rod holding drum 10.
A compression and discharge rod sliding groove 33 is provided in parallel with the pipe, and the aforementioned pipe compression and discharge rod 32 is slidably inserted into the sliding groove.

Pipe compression and discharge rod 32 (in the drawing, it is a square rod, but it may also be a rod with a circular or polygonal cross section.

) is provided with a discharge bin 34 at its left end, and when the forming rod holding drum 10 rotates, the discharge bin 34 slides on a discharge bin guide 35 fixed to the base 1, and the pipe compression discharge rod 32 is moved to the right. The pipe receiver 36 fixed at the tip presses the straw pipe 2, and the right end of the straw pipe is held immovably by the extrusion rod 17. The irregularities become flexible folds.

The situation is shown in Figure 8. The pipe receiver 36 is provided with a forming rod insertion hole 37, and slides along the forming rod 20 to move from side to side.

As the molding rod holding drum 10 rotates, a straw pipe is formed, and when the pipe supply drum 8 has also made approximately half a turn, a return claw 3 is attached to a return chain 38 rotated at high speed by a motor 12 at the bottom of the pipe supply drum 8.
9 is provided, the bottle 18 of the extrusion rod 17 is caught by the return claw 39, and the extrusion rod 17 returns to its original position.

Here, the return chain 38 is stretched between a gear 40 interlocked with the motor 12 and two return sprockets 41a and 41b pivotally supported on the base 1.

When the extrusion rod 17 returns to the starting point, a discharge chain 42 and a discharge claw 43 provided thereon are disposed at the lower part of the forming rod holding drum 10 in the same manner as the return chain 38, and a gear 44 which is also linked to the motor 12 is disposed. and two discharge sprockets 45a pivotally supported on the base 1.
, 45b, the pipe compression discharge rod 32
The discharge claw 43 is hooked on the discharge bin 34 provided in the pipe compression discharge rod 32, and the pipe receiver 36 at the tip of the pipe compression discharge rod 32 instantly moves to the right end of the forming land 20, and the forming rod 20
The pleated straw 46 is inserted into the molded rod 20.
and place it on the discharge conveyor 47 (see FIG. 2).

Since the discharge conveyor 47 is also interlocked with the motor 12, the pleated strips 0-46 are discharged to the outside of the apparatus.

When the forming rod holding drum 10 further rotates and enters area C, the pipe compression discharge rod 32 that has finished discharging the pleated straw is transferred to the discharge bin 34 by the back discharge pin guide 48 fixed to the base 1 on the back of the device. As it slides, it gradually retreats and returns to its starting point.

Then, after reaching area d, preparations for forming the next straw pipe are made, area a is continuously entered again, and the series of operations detailed above are performed.

Up until now, we have explained in detail the structure of the manufacturing apparatus of the present invention by following the process of forming a single straw pipe as an example, but of course, several dozen forming rods are connected in series around the outer periphery of each drum. Therefore, these products are manufactured into pleated straws through the same process in sequence.

Therefore, for example, if 40 molding rods are provided around the circumference and rotated at 5r, pm-, it is possible to create a high-speed continuous manufacturing device that can manufacture 200 pleated straws per minute. In addition, it is economically effective because it requires almost no labor.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part taken along line A-A in Fig. 1, Fig. 3 is a side view of the molded part, and Fig. 4 is a top view of the main part in the same place. It is a diagram. Fig. 5 is an enlarged sectional view of section C in Fig. 4, Fig. 6 is an enlarged left side view of section B in Fig. 1, Fig. 7 is an enlarged front view of the same, and Fig. 8 is the tip of the pipe compression and discharge rod. FIG. FIG. 9 is an explanatory diagram of various steps regarding the rotational position of the forming rod holding drum. 1...Base, 3...Hopper, 8.
... Pipe supply drum, 10 ... Forming rod holding drum, 16 ... Extrusion rod sliding groove,
17... Extrusion rod, 18... Bin,
1S... Supply extrusion kite, 20... Molding rnd, 22... Molding groove, 23. Curved/molding part, 25... Molding roller, 28・・・・・・
Presser roller, 32... Pipe compression discharge rod, 33... Compression discharge rod sliding groove, 34...
...Ejection bin, 35...Ejection pin guide.

Claims (1)

[Claims] 1. A pipe supply drum 8 on the outer periphery of which a number of extrusion rods 17 having the diameter of a straw or a little thick are arranged in a number of extrusion rod sliding grooves so as to be slidable in the direction of the forming rod 20; A molding rod holding drum 10 in which a large number of straws on the same circumference are inserted is rotatably provided, and the molding rod holding drum 10 is rotatably driven coaxially and facing each other. rod 2
A pipe compression discharge rod 32 that moves along the extrusion rod 17 is slidably provided to face the extrusion rod 17, and the forming rod 2
A forming roller 25 that presses the forming groove 22 of 0 from both sides.
A presser roller 28 is provided on the base 1, and the extrusion rod 17
A bottle 18 protruding toward the outer circumference and its guide 19 provided in
A discharge bin 34 protruding toward the outer circumference provided on the pipe compression discharge rod 32 and its guide 35 automatically perform molding, compression, and discharge in sequence by supplying the pipe into the discharge rod sliding groove. Folded straw manufacturing equipment.