JPH02109817A - Packer for cylindrical article - Google Patents

Abstract

PURPOSE:To securely and easily seal the edge of a packing sheet without any mechanical impulses causing damage against said packing sheet, by sucking the margin contracted by deaeration into the hollow center after the margin of the packing sheet is contracted by a bend arm. CONSTITUTION:A half-packed article 1' is supported by a supporting mechanism and fixed, with a margin 2' at both sides of a packing sheet 2. And then the whole apparatus mounted on a frame 12 is brought closely to the half-packed article 1' by the rod forward movement of a second cylinder 5 to insert the front of a suction pipe 4 into the hollow center. Next, the piston rod 3A of a first cylinder is moved back and then respective pinions 10 rotate according to the back movement of cylindrical gear racks 9 and hence respective bend arms 8 are actuated to contract the margin 2 extending cylindrically by the bend arms 8. Next, when a deaerator 6 is operated, the contracted margin 2' is instantaneously sucked into the hollow center.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method of applying a non-breathable, wide, flexible packaging sheet such as film cellophane paper or resin-coated paper to the outer periphery of a cylindrical article such as a reel. A cylindrical article that can be packaged by wrapping the product so that there is a margin in the section, and then constricting the margin along the end surface of the cylindrical article and fitting the constricted end into the hollow center of the cylindrical article. Related to packaging equipment.

(Prior Art) Conventionally, there is a technique known from Japanese Utility Model Publication No. 53-7968 as a method for automatically performing the packaging process according to the above-mentioned procedure.

This known device uses a bent arm to converge the margins at both ends of the wrapped packaging sheet along the end surface of a cylindrical article, and then the constricted end is pierced by a hammering head to create a center. By fitting it into the air core, the ends are sealed.

(Problems to be Solved by the Invention) In the above-mentioned drawing and thrusting method, in order to push the converged mass of packaging sheets with considerable force, a large force is applied to the sheets themselves due to the overlapping resistance of the packaging sheets, and as a result, the packaging sheets There are problems that can cause damage such as rupture.

Furthermore, when the converged end surface is pushed in, the air present in the wrapping of the packaging sheet has no place to escape and moves into the packaging sheet layer wrapped around the cylindrical article, causing the packaging sheet to become air-filled. This often resulted in poor packaging, which caused aesthetic and quality problems.

In order to deal with such conventional problems, the present invention provides a packaging device that can reliably and easily seal the end face of a packaging sheet without applying any mechanical impact other than the convergence process using the bent arm. It was made with the intention of providing
The purpose of the present invention is to achieve packaging processing that maintains high quality without damaging the packaging sheet as well as tightly packaging the cylindrical article.

(Means for Solving the Problems) In order to achieve the above object, the invention of claim 1 first provides a non-breathable wide packaging sheet on the outer periphery of a cylindrical article (1) such as an unrolled product. (2) on both ears (2)
The inner diameter of the hollow core of the cylindrical article (1) is provided on both sides of a support mechanism that supports the work-in-progress article (1), which is wound as shown in FIG. The suction tube (4), which has a smaller outer diameter than that of The cylindrical gear-shaped rack (9) is loosely fitted concentrically to the suction pipe (4), and is connected to the air extraction device (6). A plurality of pinions αΦ are distributed around the rack (9) and meshed with each other to respond to the forward and backward movements of the rack (9). The same number of bent arms (8) as the pinion 0I are capable of forward and reverse rotation, and have their tips facing the support mechanism side.
are distributed around the cylindrical gear-like rack (9), and each base is engaged with each of the pinions Q [11], and each bent arm (8) is moved by the backward and forward movement of the rack (9).
The tip of the bent arm is formed to be openable and closable so that it can simultaneously approach and separate from the end surface of the work in progress (1)' and the suction tube (4), and insert the tip of the suction tube (4) into the hollow core. (8
), the air extraction operation of the air extraction device (6), the opening operation of the bent arm (8), and the removal of the suction pipe (4) are sequentially operated.

Next, in claim 2, in contrast to the configuration in claim 1, the supporting mechanism supports the supported work in process (1)' in a packaging sheet (
2) has a structure that can be rotated in the tightening direction, and when the bent arm (8) is closed, the work-in-progress item (1)'
This makes the convergence of the margin portion (2)' more reliable by increasing the rotation by one degree.

Further, in the invention of claim 3, in contrast to the structure of claim 2, the support mechanism is a mechanism for supporting the cylindrical article (1) in an immovable state, and each pinion 0ω is connected to a cylindrical gear-like rack ( 9), which is rotatably supported on a holder (7) concentrically rotatable around the suction tube (4), and by rotating the bent arm (8) all at once around the suction tube (4). The only difference is that the wrapping paper surplus portion (2)' is converged, and the other features are the same as those of the invention of claim 2.

(Function) The present invention, which has the above-mentioned means, has a bent arm (8).
- When the arms are operated simultaneously in the closing direction, each arm approaches the end surface of the work-in-progress item (1)' and brings a portion of each finger at the tip into radial contact with the end surface to close the packaging sheet (2). Squeeze the margin (2)', and then tighten the work in progress (1) as necessary.
)' or by rotating the holder (7),
Squeeze the end of the squeezed part of the wrapping paper (2) further to bring it close to the circumference of the suction tube (4), and then insert the air bleed device (
When the air extraction operation in step 6) is started, the air inside the hollow core is extracted through the suction pipe (4), resulting in a negative pressure region inside the suction pipe (4), which is converged according to this pressure difference. The extra portion (2)' is instantaneously sucked into the hollow core around the suction tube (4), thus allowing the end face to be wrapped.

In this case, the suction at the margin (2)' is performed using the pressure difference between the inside and outside of the hollow core, so unlike mechanical pushing, there is no possibility of giving an unreasonable shock to the packaging sheet (2). without damaging the packaging sheet (2).

Furthermore, not only the packaging sheet (2) but also the air between the cylindrical article (11) and the surrounding packaging sheet (2) is simultaneously sucked into the hollow core. There are no parts, and so-called tight packaging processing can be performed.

(Example) An example of the present invention will be described below based on the accompanying drawings.

1 to 3 show an embodiment of the present invention, in which (1) is a cylindrical article such as a reel, a sheet-like article (S) such as a synthetic resin film, paper, or fabric is placed in a paper tube. (C) is wound up to form a cylindrical body with a hollow core.

This cylindrical article (11) is coated with at least one layer of packaging sheet (2) having a width wider than the width of the cylindrical article (11) on the surface of the article so that there are margins (2)' on both sides of the article using an appropriate packaging machine. Wrapped with their centers coincident, and with both margins (2)' and (2)' open as shown in Fig. 4, the circumferential surface is held horizontally by an appropriate support mechanism (not shown). It is supported so that it can be forcibly rotated in the seaming direction (2), and is kept on standby as a work-in-progress item (1)' in preparation for the next end face processing step.

In addition, the width dimension of the packaging sheet (2) is the width of the above-mentioned margin (
2) It is preferable that the dimension is the width of the article plus about three times the diameter of the cylindrical article (1) so that '' can approximately match 1.5 times the diameter of the cylindrical article (11). .

On both sides of the article in progress (1)', an example of the device of the present invention for sealing the end surface of the article by squeezing the margin (2)' of the packaging sheet (2) in a chrysanthemum-fold shape is supported by a support mechanism. Since the left and right sides have the same structure, only the mechanism on the right side is shown in the drawing.

This device includes a linear reciprocating actuator (3) such as a pneumatic cylinder (hereinafter referred to as the first cylinder (3)), an actuator (5) for advancing and retracting such as a pneumatic cylinder (hereinafter referred to as the second cylinder (5)), Suction pipe (4) and air extraction device (
6) For example, a vacuum pump, a short cylindrical holder (7), a plurality of bent arms (8), (8), a cylindrical gear rack (9), and the same number of bent arms (8). It has pinions C11 and αψ and a rotating actuator αυ, such as a deceleration motor, as its constituent members.

The first cylinder (3) has a fixed-side cylinder body formed into a double cylinder consisting of an inner cylinder and an outer cylinder concentrically surrounding the outer cylinder, and a gap between the inner cylinder and the outer cylinder on the head side. This cylinder body is placed horizontally and coaxially with the work-in-progress item (1)' supported by the support mechanism, and is fixed to a frame @ slidably provided on the base αj. There is.

A suction pipe (4) is tightly fitted and integrated into the inner cylindrical part of the cylinder body so that an appropriate length protrudes from the front and back,
The bleed port of the vacuum pump (6) is connected to the rear end of the suction pipe (4) on the opposite side of the support mechanism via a rubber hose, while the inner cylinder part and the outer cylinder part The formed pressurized air chamber has a stepped cylindrical piston rond (3A).
are fitted and tightened so that they can slide airtight.

The suction tube (4) is formed into a short tube having an outer diameter considerably smaller than the inner diameter of the cough paper tube (C) so that it can be easily inserted into the paper tube (C).

On the other hand, the piston rond (3A) has a cylindrical gear-shaped rack (9) on the outer peripheral surface of the tip protruding toward the support mechanism.
The rack (9) has a structure in which a ring-shaped tooth groove is carved concentrically with the axial center of the cylinder body and perpendicular to the axis.

A cylindrical holder (7) corresponding to the rack (9) above.
is rotatably fitted concentrically to the outer periphery of the cylinder body via double row ball bearings Q4), Q4), and this holder (7) is provided with a plurality of holders, for example, on the front side around the rack (9). Six pinions 0φ and (10) are pivotally supported, and two gears are formed on the outer periphery of a flange integrally provided on the rear side.

The pinions αω are respectively pivotally supported at positions dividing the circumference of the holder (7) into six equal parts, and meshed with the rack (9).

Next, the bent arm (8), (8) is connected to the pinion 0ω
, αθ), which is shaped like a dogleg, and is divided into equal parts so that the tip of a part of the bent finger (8 m) approaches the suction tube (4) on the support mechanism side. The base is fixed to the central axis of the pinion 00) and is provided so as to be able to rotate integrally with the pinion 00) around the central axis.

The bending arm (8) is configured such that a plane formed by its rotation locus matches a radial plane passing through the common axis of the first cylinder (3) and the suction tube (4), The cylindrical gear-like rack (9) provided at the tip of the piston rod (3A) of the first cylinder (3) is moved forward, that is,
When the support mechanism moves in the direction approaching the work in process (1)' supported, a part of the fingers (8 m) simultaneously rotate in the direction away from the suction pipe (4), as shown in Fig. 1. As shown in Figure 2, when the valve is opened and the valve is moved backward,
The fingers (8,) are rotated in the opposite directions all at once to a position where they almost touch the suction tube (4), and the closing operation is performed.

On the other hand, the deceleration motor 0υ is fixed to the cylinder body of the first cylinder (3), and the gear avI fitted on the output shaft is connected to the gear α provided on the rear side of the holder (7). By meshing with each other, the rotational motion of the motor is transmitted to the holder (7).

By rotating the deceleration motor αυ, the bent arms (8) and the pinion 0θ) supported by the holder (7) are simultaneously rotated around the suction pipe (4). This is done in order to converge the squeezed packaging sheet margin (2)' to the extent that it is twisted and wrapped around the circumferential surface of the suction tube (4). If the packaging sheet (2) is made of a flexible film, the rotation of the bent arm (8) may be omitted.

To explain the operation of the apparatus having the above-mentioned configuration, an in-process article (
1)' (see Fig. 4) is supported and fixed by a support mechanism (not shown), the second cylinder (5) is operated forward to move the entire device attached to the frame to the work in progress (1)' and insert the tip of the suction tube (4) into the hollow core.

At this time, each laminar curved arm (8) is held in an open state by the forward movement of the first cylinder (3), and this operating state is as shown in FIG.

Next, the piston rod (3A) of the first cylinder (3)
When the cylindrical gear rack (9) is moved backward, each pinion 00) rotates as the cylindrical gear rack (9) moves backward, so that each bent arm (8) closes (see FIG. 2).

As a result, the cylindrical extending margin (2)' is converged by each bent arm (8), resulting in the state shown in FIG.

Subsequently, when the air extraction device (6) is operated to extract air, the converged margin (2)' is instantaneously sucked into the hollow core and the third
The packaging sheet (2) is now in the state shown in Figures and Figure 6.
An end face treatment is performed to accommodate the extra portion (2)' within the hollow core.

In addition, prior to the air extraction operation of the air extraction device (6), the work in progress (1)' is rotated on the support mechanism side, or each bending arm (8) is rotated simultaneously by rotating the deceleration motor aυ. By rotating around the suction tube (4), it is possible to further narrow down the converged margin (2)' and draw it into the hollow core more quickly and reliably, and it is relatively hard. This is a suitable means when the packaging sheet (2) is used.

After the extra space (2)' has been stored in the hollow core in this way, the first cylinder (3) moves forward and the second cylinder (5) moves forward.
The entire apparatus is returned to the standby position by performing a backward shift, and one cycle of end face processing is completed.

The finished product (1)' whose edges have been treated can be left as is since the margin (2)' will not be removed, or circular sealing labels may be attached to both ends.

The series of operations described above can be performed automatically and smoothly in sequence using control devices such as timers and limit switches.

(Effects of the Invention) As is clear from the above description, the present invention is capable of squeezing the excess portion (2)' of the packaging sheet (2) with the bent arm (8) and then squeezing it into the hollow core by bleed air. margin (2
)' allows reliable and airtight packaging processing without damaging the packaging sheet (2) compared to conventional devices in which mechanical force is directly applied to the packaging sheet (2). realizable.

Furthermore, since the present invention utilizes negative pressure, the cylindrical article (
Even if there is even a small amount of air between the wrapping sheet (2) wrapped around the body of the item 11, this air will be sucked out by the suction tube (4), so the bulging part will be removed. This eliminates all of the problems, allowing for tight and beautiful packaging.

[Brief explanation of the drawing]

FIGS. 1 to 3 are schematic mechanical diagrams showing the operating order according to one embodiment of the present invention, and FIGS. 4 to 6 sequentially illustrate the packaging processing state of in-progress goods according to the embodiment of the present invention. FIG. (1)...Cylindrical article, (1)'...Product in process, (2)...Packaging sheet, (2)'...Extra portion, (4)...Suction pipe, (6 )...Air bleed device, (7)...Holder (8)...Bent arm, (9)...Cylindrical gear rack, aω...Binion.

Claims (1)

[Claims] 1. A non-breathable wide packaging sheet (2) is wrapped around the outer periphery of a cylindrical article (1) such as an unrolled product so that there are margins (2)' at both ears. Suction pipes are provided on both sides of a support mechanism that supports the work-in-process article (1)' in a horizontal state on its peripheral surface, and have an outer diameter smaller than the inner diameter of the hollow center of the cylindrical article (1). (4) coaxially with the work in progress (1)' supported by the support mechanism, and
The end openings are arranged in the hollow core so as to be able to move forward and backward in the direction of their own axis so that they can be inserted and removed, and are connected to the air extraction device (6), while the cylindrical gear-shaped rack (9) is A plurality of pinions (10) are disposed concentrically and loosely fitted on the pipe (4) to enable independent forward and backward movement in the axial direction of the pipe, and furthermore, a plurality of pinions (10) are distributed around the rack (9) and meshed with each other. The same number of bent arms (8) as the pinions (10) are attached to the cylindrical gear, and the bent arms (8) are capable of forward and reverse rotation in accordance with the forward and backward movement of the rack (9), and have their tips facing the support mechanism side. The bent arms (8) are distributed around the circumference of the rack (9), and each base is engaged with each pinion (10), so that the tips of the bent arms (8) are simultaneously moved by the backward and forward movement of the rack (9). The bent arm (8) is formed to be openable and closable so as to be able to approach and separate from the end surface of the work-in-progress item (1)' and the suction tube (4), and insert the tip of the suction tube (4) into the hollow core.
A packaging device for cylindrical articles, characterized in that the closing operation of the air extraction device (6), the air extraction operation of the air extraction device (6), the opening operation of the bent arm (8), and the removal and removal of the suction tube (4) are performed in sequence. 2. A work-in-progress product (1)' made by wrapping a non-breathable wide packaging sheet (2) around the outer periphery of a cylindrical product (1) such as an unrolled product so that there are margins (2)' at both ears. are provided on both sides of support mechanisms that support the packaging sheet (2) horizontally on its peripheral surface and rotate the packaging sheet (2) in the tightening direction, and the inner diameter of the hollow core of the cylindrical article (1) The suction pipe (4), which has an outer diameter smaller than that of
)' are respectively disposed so as to be able to move forward and backward in the direction of their own axis so as to be able to be inserted into and removed from the hollow core of the cylindrical gear rack (9).
is loosely fitted concentrically into the suction pipe (4) so that it can independently move forward and backward in the axial direction of the pipe, and furthermore, a plurality of pinions (10) are distributed around the rack (9). The same number of bent arms (8) as the pinions (10) are engaged with each other so as to be capable of forward and reverse rotation according to the forward and backward movement of the rack (9), and have their tips facing the support mechanism side.
are distributed around the cylindrical gear-like rack (9) and each base is engaged with each of the pinions (10), and each bending arm (8) is moved by the backward and forward movement of the rack (9).
The tip of the bent arm is formed to be openable and closable so that it can simultaneously approach and separate from the end surface of the work in progress (1)' and the suction tube (4), and insert the tip of the suction tube (4) into the hollow core. (8
), the rotation of the work-in-progress item (1)', the closing operation of the air extraction device (
6) A packaging device for cylindrical articles, characterized in that the air extraction operation, the opening operation of the bent arm (8), and the withdrawal of the suction tube (4) are performed in sequence. 3. A work-in-progress product (1)' made by wrapping a non-breathable wide packaging sheet (2) around the outer periphery of a cylindrical product (1) such as an unrolled product so that there are margins (2)' at both ears. are provided on both sides of a support mechanism that supports the cylindrical article (1) on its peripheral surface in a horizontal state. Coaxially with the work-in-process work (1)' supported by the support mechanism, and the work-in-process work (1)
The end openings are arranged in the hollow core so as to be able to move forward and backward in the direction of their own axis so that they can be inserted and removed, and are connected to the air extraction device (6), while the cylindrical gear-shaped rack (9) is It is loosely fitted concentrically to the pipe (4) so that it can independently move forward and backward in the axial direction of the pipe, and furthermore, a plurality of pinions (10) are distributed around the rack (9) and meshed with each other. At the same time, the rack (9) is pivotally supported by a holder (7) rotatably provided concentrically around the rack (9), so that the rack (9) can be rotated in forward and reverse directions according to the forward and backward movement of the rack (9). The same number of bent arms (8) as the pinions (10) with their tips facing the support mechanism are distributed around the cylindrical gear-like rack (9). and each base is engaged with each pinion (10), and the rack (9) is moved back and forth.
By forward motion, each bent arm (8) is formed to be openable and closable so that its tip can simultaneously approach and separate from the end surface of the work in progress (1)' and the suction pipe (4).
4) Insertion of the tip, closing operation of the bent arm (8), rotation of the bent arm (8) around the suction tube (4), air extraction operation of the air extraction device (6), and operation of the bent arm (8) to close the bent arm (8). 1.) A packaging device for cylindrical articles, characterized in that the opening operation of the tube (4) and the withdrawal of the suction tube (4) are performed in sequence.