JP2799692B2 - Perforation processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation apparatus for perforating a film-like sheet.

[0002]

2. Description of the Related Art As a device for perforating a film-like sheet, a rotatable blade roller having a blade embedded in the outer periphery and a soft rubber to which the blade of the blade roller presses are mounted on the outer periphery. A perforation processing device provided with a drum is known.

[0003] In the case of perforation, the blade roller and the drum are rotated while the film-like sheet is put between the blade roller and the drum, and each blade of the blade roller is fed while a constant feed is applied to the film-like sheet. Is pressed against the soft rubber of the drum, whereby a perforation is made in the length direction (sheet feeding direction) of the film-like sheet.

On the other hand, a perforation processing apparatus for perforating a film-like sheet in a width direction (a direction orthogonal to a sheet feeding direction) is provided in a thickness direction of a drum instead of the blade roller. It has a processing tool having a straight blade at its tip, and presses it against a film-like sheet that moves with the outer peripheral surface of the drum to perform perforation processing.

However, in the case of this perforation processing apparatus, the processing tool is simply reciprocated at the time of perforation processing, so that the leading edge thereof and the moving film-like sheet are moved. A slip has occurred. For this reason, a perforation may not be accurately formed at a desired position, and in particular, in the case of a thin film sheet, the film sheet may be broken.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a perforation processing apparatus capable of accurately performing perforation processing on a film-like sheet.

[0007]

SUMMARY OF THE INVENTION A perforation processing apparatus according to the present invention is a perforation processing apparatus for performing perforation processing on a film-like sheet, and rotates while giving a constant feed to the film-like sheet. A drum having a tooth formed with a plurality of mountain-shaped teeth extending in the thickness direction of the drum at a tip thereof, and a retreating position in which the blade is pressed against the drum outer peripheral surface and separated from the drum outer peripheral surface; A processing tool provided reciprocally, and a driving mechanism for driving the processing tool, wherein the driving mechanism has a first rotating shaft and a driving means for driving the first rotation axis; A second rotating shaft arranged in parallel with the first rotating shaft and rotating in synchronization with the first rotating shaft;
A rotating shaft, and provided at the tip of the first and second rotating shafts eccentrically from the center of each of the rotating shafts,
A first and a second eccentric shaft which are inserted through the processing tool and are rotatably supported by the processing tool, respectively, and the blade of the processing tool is perpendicular to the drum outer peripheral surface during perforation processing. , The amount of eccentricity of the first and second eccentric shafts is set.

[0008]

When a perforation is performed by the perforation processing apparatus according to the present invention, the processing tool is driven by the drive mechanism.
That is, first, the first rotating shaft is driven and rotated by the driving means. Due to the rotation of the first rotating shaft, the second
Rotates in synchronization with the first rotation axis. Then
The first and second eccentric axes pivot around the first and second rotation axes, respectively. Thus, the processing tool rotatably supporting the first and second eccentric shafts starts reciprocating while rotating around the rotation center of the first and second rotation shafts.

On the other hand, a constant feed is given to the film-like sheet by the rotation of the drum, and from this state, the film-like sheet is perforated by the processing tool which has started to reciprocate.

[0010] During the perforation, the blade at the tip of the processing tool moves on the drum outer peripheral surface in the moving direction of the drum outer peripheral surface in a state of being pressed against the drum outer peripheral surface. Are perpendicularly in contact with the outer peripheral surface of the drum. Thus, during processing, the blade at the tip of the processing tool can be constantly applied vertically to the film-like sheet moving on the outer peripheral surface of the drum, and while maintaining this state, the blade in the direction of movement of the film-like sheet is maintained. Can be moved. As a result, perforations can be accurately formed at desired positions on the film-like sheet, and perforation processing can be performed accurately.

In this case, the rotational speed of the drum and the outer diameter of the drum are adjusted in advance so that the moving speed of the blade at the tip of the processing tool on the outer peripheral surface of the drum is equal to the peripheral speed of the outer peripheral surface of the drum. If this is done, perforation processing can be performed more accurately.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 10 are views for explaining a perforation processing apparatus according to an embodiment of the present invention, and FIG. 1 is a schematic front view of a product packaging line including a packaging machine employing the apparatus of the embodiment. 2 is an II-II line view (enlarged view of the device of this embodiment), FIG. 3 is a III-III line view of FIG. 2, and FIG.
5 is a sectional view taken along the line IV-IV in FIG. 2, FIG. 5A is an enlarged view of a blade of a processing tool constituting the apparatus of this embodiment, and FIG. 5B is a perforation processed by the blade of FIG. FIG. 6, FIG. 6 is an overall perspective view of a drum constituting the apparatus of the present embodiment, FIGS. 7 to 9 are schematic views for explaining the operation of the apparatus of the present embodiment, and FIG. 10 is unloaded from the product packaging line. It is an enlarged partial view of a product.

This product packaging line is a packaging line for film-wrapping a resin-made molding spoon. As shown in FIG. 1, the product packaging line is formed by a packaging machine 1 and a station 21 on which a molding spoon 20 is placed. And a feeding device 2 for feeding the spoon 20 to the packaging machine 1.

The feeder 2 is configured to be able to reciprocate by an endless belt 22 and has a suction pad 23 for holding the spoon 20 by suction. In addition, a belt conveyor 24 is provided between the feeding machine 2 and the packaging machine 1. The spoon 20 taken out of the station 21 by the feeder 2 is transferred to a belt conveyor 24 and supplied to the packaging machine 1 from the belt conveyor 24.

In the packaging machine 1, the molding spoon 20 is made of two upper and lower film-like sheets (hereinafter simply referred to as "film").
The lower reel 11 from which the lower film is fed out, the upper reel 12 from which the upper film is fed out, and a constant feed to the upper and lower films with the forming spoon 20 interposed therebetween. And a drum 1 constituting a part of a perforation processing device 14 described later.
3, a perforation processing device 14 for perforating the film in the width direction of the film according to an embodiment of the present invention, and seal rollers 15, 16 for heat-sealing the upper and lower films.
And a cut roller 18 for cutting the film into predetermined lengths, and a perforated roller 17 having a blade formed on the outer periphery for perforating the film in the length direction. An unloading conveyor 19 is arranged on the product unloading side of the packaging machine 1.

The perforation processing device 14 is provided inside the packaging machine 1 as shown in FIG. 2 and a processing tool 30 for performing perforation processing by pressing against the drum 13.
And a driving mechanism 40 for driving the zero.

The processing tool 30 has a blade 31 extending in the thickness direction of the drum 13 (the left-right direction in FIG. 2), a holder 32 for holding the blade 31, a holder 32 fixed to the tip, and a driving mechanism 40.
And a lever 33 that reciprocates. And
Due to the reciprocating movement of the lever 33, the blade 31 at the tip of the processing tool can take a pressure contact position (solid line position in FIG. 3) pressed against the outer peripheral surface of the drum and a retracted position (dashed line position in FIG. 3) away from the outer peripheral surface of the drum. It has become.

In the holder 32, as shown in FIG. 4, a film holder 34 for holding the blade 31 from both sides and having an end surface 34a abutting on the film surface is provided so as to be able to protrude and retract. A hole 32a is formed in the holder 32, and each film holder 34 is provided in the hole 32a.
Are biased in the projecting directions. With this configuration, when the blade 31 comes into pressure contact with the film, first, the film holder 34 comes into contact with the film surface,
Next, as the amount of bite of the blade 31 into the outer peripheral surface of the drum increases, each film holder 34 gradually retreats and the holder 32
This not only prevents the film from escaping, but also minimizes the amount of protrusion of the blade 31 during processing, making it possible to prevent the film 3 from escaping.
1 can be prevented from lowering.

As shown in FIG. 5A, the blade 31 has a tooth portion 31a formed of a large number of mountain-shaped teeth formed at the tip thereof.
And slit portions 31b formed at predetermined intervals on the tooth bottom side of the tooth portion 31a.

On the other hand, as shown in FIG. 6, a spoon receiver 38 having an upper surface formed in a concave shape for receiving a forming spoon is attached to the drum 13 at equal intervals around the entire circumference. A block-shaped rubber member 39 made of, for example, a fluororesin is attached between the spoon receivers 38.

At the time of perforation, the blade 3 at the tip of the processing tool is used.
The first tooth portion 31a comes into pressure contact with these rubber members 39. When the tooth portion 31a is pressed against the rubber member 39, the blade 31 is immersed in the rubber member 39 to a depth indicated by a dashed line in FIG.

As shown in FIG. 2, the driving mechanism 40 includes a main shaft 41 connected to a driving motor (not shown).
And a first rotating shaft 45 to which the rotational force of the drive motor is transmitted via gear trains 43 and 44 including a gear 42 fixed to the end thereof, and a second rotating shaft disposed in parallel to the first rotating shaft 45. And a shaft 46.

The first and second rotating shafts 45 and 46 are rotatably supported by brackets 47 and 48 fixed to the base plate 10, respectively. A pulley 49 is attached to the first rotating shaft 45, and a pulley 50 is attached to the second rotating shaft 46, and a timing belt 51 is wound between these pulleys. Thus, the second rotation shaft 46 rotates in synchronization with the first rotation shaft 45.

The first and second eccentric shafts 55 and 56 are attached to the tips of the first and second rotary shafts 45 and 46, respectively. The first and second eccentric shafts 55 and 56 respectively penetrate the lever 33 of the processing tool 30.

The first eccentric shaft 55 is provided with a bracket 57 at the first eccentric shaft insertion point of the lever 33.
Is rotatably supported by a bearing 58 in a bracket 57. An elongated hole 59 extending in the longitudinal direction of the lever 33 (vertical direction in FIG. 2) is formed at the second eccentric shaft insertion portion of the lever 33 (see FIG. 3). A bearing 60 is attached to the outer periphery of the eccentric shaft 56.

With this configuration, when the drive mechanism 40 is driven, the first and second eccentric shafts 55 and 56 rotate around the centers of the first and second rotary shafts 45 and 46, respectively, and perform a crank motion. As a result, the lever 33 reciprocates. The reason why the second eccentric shaft 56 is inserted into the long hole 59 is to absorb a dimensional error generated at the time of the crank movement of the first and second eccentric shafts 55 and 56 by the long hole 59. .

The eccentric amounts of the first and second eccentric shafts 55 and 56 are set such that the blade 31 is always in vertical contact with the outer peripheral surface of the drum at the pressure contact position of the blade 31 at the tip of the processing tool. I have.

Next, the perforation operation by the apparatus of this embodiment will be described with reference to the schematic diagrams of FIGS. In these figures, e ₁ and e ₂ are the first and the first, respectively.
The eccentric amounts of the second eccentric shafts 55 and 56 are shown. Also, C ₁ , C ₂ , and C ₃ indicate contact points of the blade 31 at the tip of the processing tool with the drum outer peripheral surface, C ₁ indicates a point at which the blade 31 starts to contact the drum outer peripheral surface, and C ₂ indicates a blade. 31 the point that most bites into the drum outer peripheral plane, C ₃ indicates the point where the blade 31 starts away from the outer peripheral surface of the drum, respectively. In each drawing, the intervals between the points C ₁ , C ₂ , and C ₃ are exaggerated for convenience of explanation. The arrow in the figure indicates the rotation direction of the drum 13.

At the time of perforation, the drum 13 is rotated to give a constant feed to the upper and lower films sandwiching the forming spoon 20. On the other hand, by driving a drive motor (not shown) to rotate the main shaft 41, the first and second rotating shafts 45 and 46 are synchronously rotated.

Then, the first and second eccentric shafts 55 and 56 rotate around the first and second rotary shafts 45 and 46, respectively, and perform a crank motion.
The reciprocating motion starts while rotating around the rotation centers of the second rotating shafts 45 and 46.

[0031] Now, as shown in FIG. 7, by rotation of the lever 33, the blade 31 of the processing tool tip is in contact with the point C ₁ on the drum outer peripheral surface (upper surface of the rubber member 39). At this time, the two-dot chain line m ₁ connecting the centers of the first and second eccentric shafts 55 and 56 and the point C ₁ passes through the center O of the drum 13. That is, the blade 31 is vertically in contact with the outer peripheral surface of the drum. Similarly, a two-dot chain line m ₂ connecting the centers of the first and second rotating shafts 45 and 46 also passes through the center O of the drum.
Intersection of the two-dot chain line m ₂ and the drum outer peripheral surface corresponds to the point C _2. Each two-dot chain line m ₁ , m ₂ preferably forms a minute angle α of about 1 °.

From this state, when the lever 33 rotates and the first and second eccentric shafts 55 and 56 move on the two-dot chain line m ₂ as shown in FIG. _{When 1} overlaps with the two-dot chain line m ₂ , the blade 31 is in perpendicular contact with the drum outer peripheral surface at the point C ₂ , and the blade 31 is in a state of being cut most into the drum outer peripheral surface.

Next, the lever 33 is further rotated, as shown in FIG.
As shown in the figure, the tip blade 31 is located at the point C ₃ on the drum outer peripheral surface.
, The two-dot chain line m ₁ connecting the centers of the first and second eccentric shafts 55 and 56 to the point C ₃ is the center O of the drum 13.
, And the blade 31 maintains a state of being in vertical contact with the drum outer peripheral surface. Similarly, the two-dot chain lines m ₁ ,
m ₂ preferably forms a small angle α of about 1 °.

As described above, when the blade 31 at the tip of the processing tool moves from the point C ₁ to the point C ₃ on the outer peripheral surface of the drum along the moving direction of the outer peripheral surface of the drum, the film that moves with the rotation of the drum 13 f is perforated. At the time of this perforation, as described above, the blade 31 is always in vertical contact with the drum outer peripheral surface, so that the blade 31 can be constantly applied to the film f moving on the drum outer peripheral surface, As a result, the film f can be accurately perforated.

Moreover, in this case, the blade 3 at the tip of the processing tool is used.
1 the moving speed from the point C ₁ on the outer peripheral surface of the drum up to the point C _3, to be equal to the peripheral speed of the drum outer peripheral surface, in advance adjust the rotation speed and the drum outer diameter or the like of the drum 13 In other words, at the time of perforation, the blade 31 moves at a speed equal to the moving speed of the film f, whereby the slip between the blade 31 and the film f becomes practically zero, and the perforation processing is performed. Can be performed more accurately.

At the time of perforation processing, the film f
However, since cutting is not performed at the slit 31b of the blade 31, a perforation 28 as shown in FIG. 5B is formed on the film f. In the same figure, each gap 3 between each cut 36
7 corresponds to each slit 31b of the blade 31.

When the lever 33 further rotates from the state shown in FIG. 9, the blade 31 at the distal end passes through the retracted position away from the outer peripheral surface of the drum, and the blade 31 moves to the position farthest from the outer peripheral surface of the drum (180 ° rotation from FIG. 8). The position of the drum), and then approaches the drum outer peripheral surface again. Then, it comes into contact with the next rubber member 39 on the drum 13 and the next portion of the film f is perforated.

FIG. 10 shows a product taken out of the packaging machine 1 through such perforation processing. This product has a molding spoon 20 with upper and lower films f
In the width direction of the film f (horizontal direction in the figure), a perforation 28 is formed by the perforation processing device 14, and in the length direction of the film f (vertical direction in the figure). Is the perforation 2 by the perforation roller 17
9 are formed.

The perforation by the perforation processing device 14 is performed after the upper and lower films are heat-sealed by the seal roller 15 (FIG. 1). Varies in length. For this reason, it is necessary to accurately perforate the heat seal portion s (the band-shaped portion surrounded by the two-dot chain line in FIG. 10) of the film f.
Can be said to be optimal for such perforation processing. Also,
In FIG. 10, s ′, which is a belt-shaped portion surrounded by a dashed line, indicates a heat seal portion heat-sealed by the seal roller 16.

In the above embodiment, the use of the blade 31 having the slits 31b as shown in FIG. 5 (a) ensures that the perforations are formed even if the thickness of the film f slightly changes. Although such a blade is shown, a blade without such a slit may be used. In this case, a fine cut perforation will be formed by inserting only the tip of the mountain-shaped tooth tip into the film.

Further, in the above-described embodiment, an example in which the present invention is applied to a spoon wrapping machine is shown. However, the present invention can be similarly applied to other product wrapping machines which perform film wrapping.

[0042]

As described above, according to the perforation processing apparatus according to the present invention, at the time of perforation, the blade at the tip of the processing tool abuts on the outer peripheral surface of the drum vertically, so that the outer peripheral surface of the drum is The blade at the tip of the processing tool can always be vertically applied to the moving film-shaped sheet, thereby providing an effect that the perforation processing can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a product packaging line including a packaging machine employing a perforation processing apparatus according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG. 1 (an enlarged view of the device of the present embodiment).

FIG. 3 is a view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2;

5A is an enlarged view of a blade of a processing tool constituting the apparatus of the present embodiment, and FIG. 5B is a diagram showing a perforation processed by the blade of FIG.

FIG. 6 is an overall perspective view of a drum constituting the apparatus of the present embodiment.

FIG. 7 is a schematic diagram for explaining the operation of the apparatus according to the embodiment.

FIG. 8 is a schematic diagram for explaining the operation of the apparatus according to the embodiment.

FIG. 9 is a schematic diagram for explaining the operation of the apparatus according to the embodiment.

FIG. 10 is an enlarged partial view of a product carried out of the product packaging line.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Packaging machine 13 Drum 14 Perforation processing apparatus 30 Processing tool 31 Blade 33 Lever 40 Drive mechanism 45 1st rotation axis 55 1st eccentric axis 46 2nd rotation axis 56 2nd eccentric axis f Film (film-shaped sheet ) E ₂ , e ₂ eccentricity

Continued on the front page (72) Inventor Tadayoshi Teramoto 1-16-5 Tamadenishi, Nishinari-ku, Osaka City Inside Toho Shoji Co., Ltd. (58) Investigated field (Int.Cl. ⁶ , DB name) B65B 61/12 B31B 1/14

Claims (1)

(57) [Claims] 1. A perforation processing apparatus for perforating a film-like sheet, comprising: a drum which rotates while giving a constant feed to the film-like sheet; The blade has a tooth formed with a tooth portion formed at the tip thereof, and is provided so as to be able to reciprocate so that the blade can take a press-contact position where the blade is pressed against the drum outer peripheral surface and a retracted position away from the drum outer peripheral surface. A processing tool, a driving mechanism for driving the processing tool, the driving mechanism comprising: a first rotating shaft; a driving means for driving the first rotating shaft; A second rotating shaft that rotates in synchronization with the rotating shaft of the first and second rotating shafts, each of which is provided eccentrically from the center of each of the rotating shafts; Each is supported rotatably by the processing tool And each of the eccentricities of the first and second eccentric shafts so that the blade of the processing tool abuts on the outer peripheral surface of the drum vertically during perforation processing. A perforation processing device, wherein an amount is set.