JPH02109700A - Perforator for film - Google Patents

Abstract

PURPOSE:To continuously perforate a hole efficiently at specified pitch on a transfer film by providing a supporting rotary shaft transmitted via an eccentric mechanism to the supporting rotary shaft to which the driving of a driving motor is transmitted via a non-stage transmission mechanism on to the film transfer passage and providing a perforating mechanism part where plural rotary knives are arranged via the eccentric mechanism on this supporting rotary shaft. CONSTITUTION:The radius of the circular movement of a perforating mechanism part D arranged with a rotary knife by adjusting an eccentric mechanism is changed to align to the pitch in the film transfer direction of the hole to be formed on a transfer film(original piece) 2 the length of the rotary circumference of the circular movement thereof. A non-stage transmission mechanism 11 is then adjusted, the rotating peripheral speed of the circular movement of a perforating mechanism part D is changed, the rotating peripheral speed of the perforating mechanism part D and the transfer speed of a transfer film 2 are synchronized and when the rotary knife arranged with one rotation of the perforating mechanism part D arranged with the rotary knife becomes on the lower face, a hole is perforated at the pitch position of the hole to be formed of the transfer film 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applicable to synthetic resin films such as mulching sheets for agriculture or gardening, house deaeration sheets, and packaging sheets for packaging materials that require air permeability. Conventional technology] Conventional film punching machines that make holes in synthetic resin films are press-type film punching machines that have an upper die with a cutting die or rotating blade and a lower die that serves as a receiver and a pendulum-shaped machine. There is an opportunity to use a pendulum-type film aperture that moves the cutter blade to make the hole.

[Problem to be solved by the invention]

The former press-type film punching machine uses a mold to punch holes, so holes can be punched at precise pitches and without distortion. However, since the operation is intermittent due to the mold, it is difficult to speed up, the efficiency is low, and vibrations and noise are likely to occur. Also, there is a gap between the film manufacturing equipment and the hole punching machine.
A dancer roller is required to stand by during hole punching, which increases the length of the device and complicates the film passing mechanism.

Furthermore, in order to improve efficiency, the blades are arranged in multiple rows, which increases the size of the machine and increases the cost.

On the other hand, the latter type of pendulum-type film perforation is efficient because it uses a cutter blade that moves in a pendulum-like manner. Furthermore, since the number of rows of cutter (rotary blades) in the film transport direction is reduced, the mechanism becomes simpler, and the machine becomes more compact and inexpensive.

However, it is difficult to synchronize the film transport speed and the circumferential speed of the cutter swing, making it difficult to make holes at an accurate pitch. In addition, the tuning range in which any set pitch can be set is narrow, and the tuning limit speed (approximately 20 m/lll1n) is low. Also, it is difficult to bring the swinging cutter into contact with the surface of the conveyed film perpendicularly, so the holes are easily deformed and it is difficult to make accurate holes.

The present invention has been made taking both of these into consideration, and its purpose is to continuously form accurate pinch holes in a conveying film, and to form accurate holes without deformation. The goal is to reduce the number of rotating blades, and also to simplify the mechanism, thereby increasing the speed of drilling and increasing the precision of drilling. 1. Simplifying the machine structure. 2. Making the machine smaller. ification.

The goal is to reduce costs, etc.

[Means to solve the problem]

The configuration of the present invention for achieving the above object is such that the drive of the drive motor is transmitted via a continuously variable transmission mechanism to a support rotation on a film conveyance path on which a pinch roller is provided which is rotated by the drive of the drive motor. A mechanical part is provided for the hole opening, in which a shaft is provided, and a plurality of rotary blades are arranged on the support rotating shaft through an eccentric mechanism that can steplessly adjust the eccentric distance. It is provided with a vertical holding mechanism that holds it perpendicular to the surface.

[For production]

For film hole punching, if the machine is configured as described above, by adjusting the eccentric mechanism and changing the radius of the circular motion of the mechanism, the length of the rotational circumference of the circular motion can be adjusted to the length of the rotational circumference of the conveying film. The pitch is adjusted to the pitch of the holes to be formed in the film transport direction. In other words, the holes that match the pitch in the transport direction of the transport film are such that the position of the rotary blade is on the bottom surface when the mechanism part makes exactly one revolution.

Next, by adjusting the continuously variable transmission mechanism and changing the rotation peripheral speed of the circular motion of the mechanism part, the rotation peripheral speed of the mechanism part and the conveyance speed of the conveying film are synchronized, and the rotary blade is arranged. The holes are drilled at the pitch positions of the holes to be formed in the transport film when the mechanical part rotates once and the rotary blade disposed thereon faces downward.

In other words, the mechanical part revolves around the holes at a predetermined pitch circle, and the rotary blade rotates on its own axis to sequentially make holes in the conveying film at a certain precise pitch. .

In addition, if a vertical holding mechanism is installed in the mechanical part, the perforation can be made even if the mechanical part moves circularly, the rotary blade installed in the mechanism will always keep the conveying film in place due to the vertical balance action of the vertical holding mechanism. It is held perpendicular to the The hole is then drilled by a rotating blade held vertically, creating a precise hole without deformation or distortion.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 and 2 show an embodiment of a film aperture machine according to the present invention.

The film aperture machine of the present invention basically uses a drive motor M.
A support rotation shaft B to which the drive of a drive motor M is transmitted via a continuously variable transmission mechanism H is provided on the film transport path A in which a pinch roller rotated by the drive of A mechanical part is provided for opening a hole in which a plurality of rotary blades C are arranged via an eccentric mechanism E that can adjust the eccentric distance steplessly, and the hole is opened by a mechanical part with the rotary blade C @ relative to the conveying film surface. A vertical holding mechanism F for vertical holding is provided.

The film transport path A is constituted by the upper surface of the frame 1, and at the rear end side of the film transport path A, a feeding roller 3 for feeding out the original fabric (synthetic resin film (transport film)) 2 is provided. On the other hand, on the tip side of film transport path A, the original film (
A take-up roller 4 for winding up the synthetic resin film (iIli feed film) 2 is provided. Pinch rollers 5 each consisting of an upper roller and a lower roller for conveying the composite film 2 are disposed before and after the central portion of the film conveyance path A.

These rollers 3, 4.5 are driven by a drive motor (biased speed motor) M provided within the frame 1, and their rotation is transmitted via a chain 6.

At the center of the film conveyance path A, the support rotation shaft B is disposed which supports a mechanical part in which a large number of rotary blades C are disposed. The support and fixed shaft B is supported by bearings 7 provided on the left and right sides of the frame 1, and flywheels 8 are provided on the inner sides thereof. A continuously variable transmission H of transmission type is interposed between the support rotation shaft B and the drive motor M, and the support rotation shaft B is changed by operating the speed change operation handle 9 of the continuously variable transmission H. The peripheral speed of rotation can be set arbitrarily. Note that the drive motor M that rotationally drives each of the rollers 3, 4.5 and the drive motor M that rotationally drives this support rotating shaft B may be configured to be driven by separate drive motors. As shown in FIGS. 3 and 6, the hole opening mechanism includes a guide 10b that is slidably provided between guide rails 10a extending in the width direction of the film transport path A, and an actuator (for example, a motor) attached to the guide 10b. M
A large number of rotary blades C rotating at a speed of 1 are arranged in the width direction of the film transport path A at a constant interval (α). In this embodiment, the rotary blades C having the actuator M1 are arranged in two rows in the film transport direction in the width direction of the film transport path A in order to increase efficiency.

In addition, when making holes in the synthetic resin film 2 in a staggered manner, each rotary blade C in the second row is connected to two adjacent rotary blades in the aligned first row.
The rotary blades C are arranged so as to be located between two rotary blades C. - The interval between the rotary blades C in the row and the rotary blades C in the second row is such that, as shown in FIGS. 4 and 5, the guide shafts 11 are on the left and right, and right-handed threads are on both sides.

A blade spacing adjustment mechanism G consisting of a screw shaft 12 with a left-hand thread and a connecting shaft 14 that transmits rotation to each screw shaft 12 via a bevel gear 13 is provided. Then, the interval between both the front and rear rotations C is set to, for example, 1/2P (pitch).

The hole-opening mechanism section in which a large number of the rotary blades C are arranged is supported by left and right support rotation shafts B via an eccentric mechanism E, as shown in FIG. The eccentric mechanism E includes an eccentric displacement screw 18. which connects the transmission shaft 16, which is provided so as to pass through both flywheels 8 of the support rotation shaft B, via a bevel gear 17.17.
19, a communication shaft 22 provided on the eccentric displacement screw 18.19 and guided by both guide blocks 20.21, and the eccentric operation handle 15 provided at the end on the transmission shaft 16. The eccentric movement screws 18 and 19 are rotated through the transmission shaft 16 by the operation of FIG. Due to this amount of eccentric movement (amount of eccentricity), the opening of the hole is caused by the rotation radius R of the circular motion of the mechanism part.
is set. That is, the opening of the hole is performed by making the position of the mechanism part eccentric by an arbitrary amount from the rotation center O of the support rotating shaft B, and by changing the radius R of the circular motion of the mechanism part as shown in FIG. As shown in FIG. 8, the length of the circumference of the holes in the transport film 2 is adjusted to the pitch P. Incidentally, a rotating bearing 23 is provided at the intermediate portion of the communication shaft 22 so as to absorb the deflection of the shaft.

In addition, a vertical holding mechanism F is provided on the hole punching mechanism section to ensure that the rotary blade C provided on the hole punching mechanism section always comes into vertical contact with the synthetic resin film 2 being conveyed. ing.

The vertical holding mechanism F includes plates 24a, 24b, 24c, and 24d arranged parallel to each other in a rectangular shape, as shown in FIG. 3, and a connecting rod 25a that supports these plates on the left and right.

25b, 25c, 25d, the transmission shaft 16 and the connecting rod 2
It is comprised of track chains 26a and 26b that connect between 5a and connecting rods 25a and 25b, and a balance weight 27 provided at the end of a plate 24d. When the hole is opened, even if the mechanism part makes a circular movement due to eccentricity and swings up and down, the balance weight 27 of the vertical holding mechanism F balances the weight and holds the mechanism part horizontally. The holes are opened using a rotary blade C provided in the mechanical part of the transport film 2.
It is always maintained perpendicular to the lume plane.

When holes are formed in the original fabric (synthetic resin film (conveyance film)) 2 using a machine, such film holes are formed in the following manner.

First, the hole opening is set according to the size and arrangement of the hole in which the rotary blade C provided in the mechanism is to be formed.

Next, to open the hole in which the rotary blade C is disposed, the rotation radius R of the circular motion of the mechanism part is changed by operating the eccentric operation handle 15 of the eccentric mechanism E, and the length of the rotation circumference of the circular motion is adjusted to the length of the rotation circumference of the conveying film. 2 (see FIG. 8). That is, the hole opening is arranged by rotating the radius R of the circular motion of the mechanism part (the rotary blade C revolves) so that the mechanism part is in rolling contact with the conveying film 2 on the film conveying path A. The rotary blade C is at the bottom position and the conveying film 2
The eccentric mechanism is adjusted and determined so that holes are made at a predetermined pitch P by sequentially coming into contact with the holes. Note that the eccentric operation handle 15 gets in the way during circular motion, so it is removed after adjustment.

Next, the transport speed of the transport film 2 transported on the film transport path A is determined. The pinch roller 5 provided on the film transport path A is driven by a drive motor M consisting of a variable speed motor.
Since the rotation of the transport film 2 is transmitted through the chain 6, the transport speed of the transport film 2 is determined by the eccentric speed of the drive motor M. Subsequently, the drive motor M and the hole opening change the peripheral speed of the circular motion (revolution) of the mechanism by operating the speed change operation handle 9 of the continuously variable transmission H interposed between the mechanism. The conveying speed of the conveying film 2 and this rotating circumferential speed are synchronized.

Then, the conveying film 2 is conveyed on the film conveying path A at a constant speed, and the synchronized perforation causes the mechanical part to move in a circular motion (revolution).
At the same time, each rotary blade C is rotated (rotated) by an actuator (motor) M of each rotary blade C disposed in the mechanism section to form a hole in the conveying film 2 as shown in FIG. The movement of the hole opening mechanism at this time is as shown in FIGS. 7 and 9.

The above-mentioned perforations are made when the rotary blade C, which rotates (rotates on its own axis) provided in the mechanical part, comes into contact with the transport film 2 at the lower surface position. It will be done. In the hole punching mechanism, rotary blades C are arranged in the film width direction with an arbitrary width α, and are arranged in two rows with a constant width (1/2P) in the film transport direction. As a result, the conveying film 2 has a constant width α in the film width direction.
, and holes are opened at a constant pitch P along the conveyance direction. If the rotary blades C are arranged in two rows in the transport direction as shown in the figure, holes can be opened at 1/2P intervals, and if a large number of rotary blades C are arranged in this way in the transport direction, the holes can be opened more efficiently.

When forming the holes in a staggered manner as shown in FIG. 8, the positions of the rotary blades C arranged in the second row are provided at positions intermediate between the positions in the film width direction of the first row.

In the above embodiment, a case where a circular hole is formed by the rotary blade C is described, but the hole is not limited to a circular shape.

For example, by making the rotary blade C eccentric, it is possible to form a hole having an oval shape or the like.

The film punching machine of the present invention is mainly suitable for punching holes in various agricultural or horticultural sheets and deaeration sheets for greenhouses, but it is also suitable for punching holes in packaging sheets that require ventilation for other packaging materials. It is also suitable for

〔Effect of the invention〕

As described above, the present invention provides a supporting rotating shaft on the film transport path to which the drive of the drive motor is transmitted via a continuously variable transmission mechanism, and a plurality of rotating blades are arranged on the supporting rotating shaft via an eccentric mechanism. Since a hole drill is equipped with a mechanism, the radius of the circular motion of the mechanism can be changed by adjusting the eccentric mechanism, and the radius of the circular motion of the mechanism can be changed by adjusting the eccentric mechanism. The pitch can be matched to the pitch of the holes to be formed in the transport film in the film transport direction. In addition, by adjusting the continuously variable transmission mechanism, the circumferential speed of rotation of the circular motion of the mechanical part is changed, and the circumferential speed of rotation of the mechanical part and the conveying speed of the conveying film are synchronized to form holes in the conveying film at an accurate predetermined position. The holes are opened continuously at a pitch, so the holes can be opened efficiently and the speed can be increased. The film transport speed is determined by the rotation speed of the drive motor, and the peripheral speed of the same movement of the perforation mechanism is changed by a continuously variable transmission, so the machine operating speed can be freely selected to suit the needs of the film perforation. Therefore, it is possible to select an appropriate operating speed depending on the arrangement and number of holes formed, and smooth operation without vibration or noise is possible at both high and low speeds. . In addition, since the hole punching mechanism is equipped with a vertical holding mechanism, it is possible to punch holes by bringing the rotary blade that rotates on its own axis into contact perpendicularly to the surface of the conveyed film on the film conveyance path. Therefore, it is possible to form an accurate hole without distortion, and therefore, the hole drilling process can be made more precisely. Furthermore, since we adopted a method that continuously drills holes using rotating blades that revolve and rotate on their own axis, fewer rotating blades are required, and the mechanism is relatively simple, resulting in the overall simplicity and downsizing of the machine. This will of course lead to cost reduction.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
Figure 1 is a front view, Figure 2 is a side view, Figure 3 is an enlarged perspective view of the main part, Figure 4 is an enlarged perspective view of the mechanical part of the hole opening, and Figure 5 is an enlarged view of Figure 4. 6 is an enlarged sectional view of the rotary blade portion, FIG. 7 is a diagram showing the circular movement of the mechanical part for opening holes, and FIG. 8 is a plan view of the transport film with holes formed therein.
FIG. 9 is a diagram showing the process of circular movement of the mechanical part during hole opening. A...Film conveyance path B...Support rotating shaft C...Rotary blade D...The hole is opened in the mechanical part E...Eccentric mechanism F...Vertical holding mechanism H...Continuously variable speed mechanism M... Drive motor 2... Original fabric (synthetic resin film (conveyance film)) 5... Pinch roller. C Figure Figure

Claims (1)

[Claims] (1) A support rotation shaft to which the drive motor is transmitted via a continuously variable transmission mechanism is provided on the film transport path on which the pinch roller rotated by the drive motor is installed, and the support rotation shaft is eccentric. A hole punching mechanism section is provided in which a plurality of rotary blades are arranged via an eccentric mechanism that can adjust the distance steplessly, and the hole punching mechanism section is equipped with a vertical holding mechanism that holds the rotary blades perpendicular to the surface of the conveyed film. A film punching machine characterized by comprising: