JPS61126189A - Method and apparatus for sticking film piece - Google Patents

Abstract

PURPOSE:To stick a film piece onto a cylinder at a high speed, by bringing the film piece into contact with the outside surface of a continuously orbiting cylinder under an applied pressure. CONSTITUTION:A film piece 11 attracted by vacuum to the sucking surface 17 of a vacuum hole 16 of a film piece supply means 8 is sent to a thermal adhesion section 21a of an adhesion roller 21 of a thermal adhesion means 9. A can 3 sent from afeeding turret 26 to a holder means 30 of a transfer turret 27 is orbited in the direction of an arrow mark W and revolved on its axis in the direction of an arrow mark R, with its open end being induction heated by a heating coil 37 to a temp. allowing thermal adhesion, to reach a thermal adhesion starting point B1 of a thermal adhesion section B, and revolved in its axis by an opening section holder 31 at a peripheral speed n1 similar to or slightly larger than that n2 of a roll 21 to allow the film piece 11 on the thermal adhesion section 21a to thermally adhere to the opening end under a predetermined adhere to the opening end under a predetermined pressure and then sent to an delivery turret.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for attaching film pieces, and more particularly to a method and apparatus for attaching film pieces to the outer peripheral surface of a cylindrical body such as a can body. .

(Prior Art) Open ends 2a and 3a of a seamless upper can body 2 and a seamless lower can body 3, as shown in FIG. However, a metal can 1 having a bonded circumferential joint 5 has been proposed as particularly suitable as a pressure-resistant container for storing carbonated drinks, beer, and the like.

In this case, the adhesive layer 4 can be formed by applying a liquid adhesive such as a thermosetting adhesive or a slurry adhesive to the open end before fitting, or electrostatically applying a powder adhesive. However, the method of applying a tape-like film piece made of heat-adhesive glass to the opening end 3a that should be inside and heating it will ensure that the adhesive layer with a uniform thickness and no defects such as pores is formed. It is preferable because it can be obtained by

Japanese Unexamined Patent Publication No. 58-152082 discloses a device for automatically thermally bonding a tape piece made of such a heat-adhesive glass film or film to the outer peripheral surface of a part of the open end of a hollow cylindrical body such as a can body. has been proposed.

(Problems to be Solved by the Invention) Thermal bonding of tape pieces by this device is carried out in a state in which a hollow cylindrical body that intermittently revolves is held in a fixed position at a thermal bonding station.

Therefore, there was a problem that there was a limit to the production speed, making it unsuitable for high-speed production.

(Object of the Invention) The present invention was made in view of the problems of the prior art described above, and the object of the present invention is to continuously attach a film piece made of thermoadhesive plastic or the like to a 67□F1 . Ka3
．． 97□, 78,5 □: To provide a method and device for wearing.

(Structure of the Invention) In order to achieve the above object, the present invention provides a method for attaching a film piece on the circumferential surface of an adhesive roll to the outer circumferential surface of a cylindrical body, in which the cylindrical body is continuously revolved. While the cylindrical body is moving along the applicator station opposite the applicator roll rotating in the same flow direction with respect to the revolution direction, the trajectory of the axis of the circular body is coaxial with the adhesive roll and whose radius is the radius of the circumferential surface of the adhesive roll, the thickness of the film piece,
and move the cylindrical body substantially in the radial direction of the revolution so that the cylindrical body becomes a part of a virtual cylindrical surface slightly smaller than the sum of the radii of the outer circumferential surface of the cylindrical body, and The outer circumferential surface of the cylindrical body is pressed against the film piece by rotating in the same flow direction with respect to the revolution direction at a circumferential speed equal to or slightly higher than the circumferential speed of the circumferential surface of the adhesion roll. The present invention provides a method for attaching film pieces, which is characterized in that the attachment is carried out by bringing the pieces into contact with each other.

Furthermore, the present invention provides an apparatus for adhering a film piece on the circumferential surface of an adhering roll to the outer circumferential surface of a cylindrical body, the apparatus including an adhering roll that rotates continuously in the same flow direction as the adhering roll. a rotatable holder for holding the cylindrical body, movably attached to the turret in the radial direction of the turret so that the axis of the cylindrical body is parallel to the axis of the pasting roll; a support that pivotally supports the holder; the cylindrical body is engaged with a cam follower installed on the support, while the cylindrical body revolves along a sticking station opposite to the sticking roll; The locus of the axis of is coaxial with the adhesive roll, and its radius is slightly smaller than the sum of the radius of the outer peripheral surface of the adhesive roll, the thickness of the film piece, and the radius of the outer peripheral surface of the cylindrical body. a fixed cam for moving the support in the radial direction of the turret so that it becomes part of a small virtual cylindrical surface; Coaxial with the adhesive roll, rotated in the same flow direction as the roll and such that the peripheral speed of the outer peripheral surface of the cylindrical body is equal to or slightly higher than the peripheral speed of the peripheral surface of the adhesive roll. The present invention provides a special film piece sticking device characterized in that it is equipped with a drive roll.

(Example) The present invention will be described below with reference to drawings which are examples.

FIGS. 2 and 3 show an apparatus 6 for thermally bonding, ie pasting, a tape-like film piece to the open end 3a of a lower can 3 of the type shown in FIG. The thermal bonding device 6 includes a web feeding device (not shown), a film piece feeding device 8 (for example, as described in Japanese Patent Application No. 58-89955), a thermal bonding roll device 9, and a can conveying device 10. There is.

The thermal adhesive roll device 9 includes a fixed shaft 18 and a roll 19 that continuously rotates around the fixed shaft in the direction of arrow Y. The roll 19 includes an inner cylinder 20 made of metal. The outer circumferential surface of the inner cylinder 20 is provided with a heat-resistant material at a position opposite to the open end 3a of the can body 3 and at a position opposite to the contact circumferential surface 31b of the base 31b of the open end holder 31, as will be described later. An adhesion outer cylinder 21 made of elastic elastic rubber (for example, rubber) and a driving outer cylinder 29 made of elastic rubber are provided (
Figure 3). In this specification, the outer cylinder 21 is an adhesive roll,
The outer cylinder 29 is called a drive roll.

The pasting roll 21 has a thermally bonded portion 21a whose length on the outer peripheral surface is substantially equal to the length of the film piece 11 and whose spacing along the circumference is substantially equal to t; A small diameter portion 21b located between each small thermal bonding portion 21a.
have. Further, the roll 19 is disposed such that the outer peripheral surface of the thermally bonded portion 21a passes through a delivery stage 100n A through which the film piece 11 is delivered from the film piece supply device 8. In this specification, the outer circumferential surface of the thermally bonded portion 21a is referred to as the circumferential surface of the adhesive roll. The roll 19 is connected to the drive shaft 2
It is continuously rotated in the direction of arrow Y at a constant speed by a drive mechanism (not shown) via 1e.

A vacuum chamber 22 is provided between the roll 19 and the fixed shaft 18 in a portion corresponding to the path from the delivery station A to the thermal bonding station B1, that is, the bonding station located at a position substantially opposite to the delivery station A along the direction of arrow Y. The vacuum chamber 22 communicates with a vacuum device (not shown) through a guide hole 23 and a center hole 24 of the fixed shaft 18.

A large number of vacuum holes 25 are formed in the thermal bonding part 21a and extend radially to the vacuum chamber 22.
The film piece 11 sent out onto the roll 19 is vacuum-adsorbed onto the outer circumferential surface of the thermal bonding portion 21a, and is held until the thermal bonding, that is, the pasting is completed.

The can transport device 10 includes a can transport turret 26 that continuously rotates in the direction of arrow 2, a can transport turret 27 that continuously rotates in the direction of arrow W, that is, in the same flow direction as the rolls 19, and revolves the can 3. It is equipped with a can body delivery turret 28 that continuously rotates in the direction of arrow Y, and a can body holder device 30.

The can transport turret 27 is rotated by a drive mechanism (not shown) via a central shaft 27a. The turret 27 has a large number (16 in the figure) of central shafts 27 along its periphery.
It is provided with an elongated support portion 36 extending in the direction a. A can holder device 30 is provided corresponding to each support portion 36. The can body Holgu device 30 includes an opening holder 31
, a bottom holder 41' coaxial with the opening holder 31, and a support 32 for each of the holders 31 and 41.

The opening holder 31 holds the opening end 3 of the can at room temperature.
Insertion part 31a1 insertion part 3 that can be inserted almost perfectly into a
1a through a stepped portion 31d, and the base 31b has a contact peripheral surface 31 having an outer diameter approximately equal to or slightly larger than the outer diameter of the open end 3a.
b1 is formed, and the holder 31 is configured to rotate when the contact peripheral surface 31b comes into contact with the drive roll 29. In addition, the holder 31 is
-31(!) is pivotally supported by the corresponding support body 32.

The bottom holder 41 has a recess into which the bottom of the can body 3 can be inserted almost exactly, and is supported by a corresponding support 32 by a shaft 41c. A vacuum hole 41a that extends in the axial direction and is connected to a vacuum device (not shown) is formed in the shaft 41c, and a cam follower 45 that engages with a cam (not shown) to move the bottom holder 41 in the axial direction. has been installed. shirt) 31c
and 41c, each gear 42 is fixed to the bottom holder 41 via a gear 43 and a link rod 44.
is configured to rotate at the same rotational speed as the opening holder 31.

As will be described later, the open end 3a has an insertion portion 31a therein.
After it is inserted almost firmly, it is heated along the entire circumference to a temperature that allows thermal bonding (for example, about 150 to 200° C.), so that thermal expansion causes loosening between the insertion portion 31 &.

The vacuum hole 41a of the bottom holder 41 serves to tightly fit the bottom of the can body 3 into the recess 4Lb by vacuum adsorption, thereby preventing the can body 3 from wobbling due to the above-mentioned loosening and from generating rotational play of the can body 3. accomplish

Each support 33 includes a slide shaft 33 movable in the radial direction of the turret 27 and a cam row 234 provided at the lower end of the slide shaft 33.

The slide shaft 33 is provided so as to be slidable along a pusher 36a provided on the support portion 36 of the turret 27. The cam roller 34 is independent of the turret 27,
It engages with a cam surface 35a that is the peripheral surface of a plate cam 35 fixed to a support (not shown).

Most of the cam surface 35a is circumferentially centered around the center axis 27a of the can body conveying turret 27, but at the sticking station, that is, the thermal bonding station B (the starting point of thermal bonding is 81%, the finishing point is 82 As shown in FIG.
9, and its radius is slightly smaller than the sum of the radius of the outer circumferential surface of the heat bonding part 21m, the thickness of the film piece 11, and the radius of the outer circumferential surface of the open end 3a of the can body. The thermal bonding part 21 is smaller by the value corresponding to the compression amount due to the pressing force described later; usually smaller by 0.05 to 1.001111).
is moved in the radial direction of the turret 27 to apply a constant pressing force along the outer peripheral surface of the open end 3a of the can body 3 and the thermally bonded portion 21a.

Note that the value of t is determined so that the tip of the film piece 11 on the thermal bonding portion 21a and the open end 3& reach the starting point B1 of the thermal bonding station B at the same time.

Therefore, t is set to a predetermined value that satisfies vlP#v2(t+tF). Here v! : Peripheral speed of the thermal bonding part, v2: Peripheral speed of revolution of the can shaft just before the starting point 81, zr: Length of the film piece, P: Between the can body at the starting point B1 and the subsequent adjacent can body circumferential axis distance.

The shaft 31c of the opening holder includes a shaft 46 and a joint 47.
, are connected to a gear 49 via a clutch 48 (for example, a pneumatic clutch). The gear 49 meshes with a gear 50 that is pivotally attached to the center shaft 27m, and the gear 50 is directly connected to a gear 51 fixed to the gear 50, a chain 52, and a motor (not shown) fixed to a support (not shown). The clutch 48 is operated by the motor via the Sugerocket 53.
It is configured to rotate at a predetermined speed in the same flow direction as the roll 19, that is, in the direction of arrow R, while the roll 19 is closed.

The clutch 48 closes as soon as the can body holder device 30 passes the can body feeding turret 26 and holds the can body 3, and opens when it reaches just before the thermal bonding starting point B1 where the circumference of the cam surface 35a ends. It is operated by a mechanism not shown.

As soon as the unilateral body holder device 30 reaches the thermal bonding station Bl, the drive roll 29
Contact peripheral surface 31b of base 31b of No. 1.

The holder 31 and therefore the can body 3 are rotated in the same flow direction as the sticking roll 21 in the direction of the gR force. This rotational speed is such that the peripheral speed (nL) of the outer peripheral surface of the open end 3a is preferably n! with respect to the peripheral speed (nz) of the peripheral surface of the sticking roll 21. =(1-1.05)nz.

Preferably nl = (1,002 to 1.01)
nz (so that the film piece 11 is attached with very slight tension), that is, the circumferential speed nl is equal to or slightly larger than the circumferential speed n2. , the contact peripheral surface 31 of the base 31b
It is determined by setting the relationship between the outer diameter of b1 and the outer diameter of the drive roll 29 (taking into account the slight dent in the elastic rubber due to contact). When the peripheral speed nl is larger than 1.05n2, the softened film piece 11 is strongly pulled during thermal bonding and becomes easy to cut.
If the film becomes smaller, the film piece 11 may sag during thermal bonding, causing wrinkles or meandering, causing the opening end 3a to become smaller.
It is easy to cause problems such as falling off.

Each support body 32 is provided with an arc-shaped high-frequency induction heating coil 37 facing the open end 3a of the can body.
Almost simultaneously with the start of the rotation (rotation), electricity is applied via a rotating transformer (not shown), etc., and by the time it reaches the thermal bonding station B, the open end 3a is almost uniformly heated to a temperature that allows thermal bonding, and as soon as the thermal bonding is completed. It is configured to be deenergized.

That is, according to the continuous rotation of the can transport turret 27,
Can body 3 revolves in the direction of arrow W and has open end 3a heated by high frequency induction heating coil 37 to a temperature that allows thermal bonding.
When reaching the thermal bonding start point B1 of the thermal bonding station B, the turret 270 moves slightly inward in the radial direction, and then moves slightly outward in the radial direction until reaching the thermal bonding end point B2, At the thermal bonding station B, the film piece 11 on the thermal bonding portion 21a is contacted under a predetermined pressure while rotating, and the film piece 11 is thermally bonded to the open end portion 3a.

(Function) In the thermal bonding device 6 described above, the film piece 11 is thermally bonded to the open end 3a of the can body in the following manner.

Thermoadhesive plastics, e.g. modified linear, If +7
Ester, nylon 11 or 12, carnoic acid modified/
A film piece 11 of a predetermined length, width and thickness made of a glass material having a relatively low melting point and a polar group such as lyolefin is placed in the vacuum hole 16 on the film piece suction surface 17 of the film piece supply device 8. The film is vacuum-adsorbed and sent to the film-piece delivery station A. At the supply station A, it is transferred onto the thermal bonding portion 21a of the pasting roll 21, and is held on the outer peripheral surface thereof by vacuum suction.

At this time, the initial position of the roll 19 is adjusted so that the leading end of the film piece 11 and the head end of the thermally bonded portion 21m substantially coincide with each other. In this way, at a predetermined interval t,
A film piece 11 of a predetermined length (1,) is delivered from the film piece supply device 8 to the thermal adhesive roll device 9 .

On the other hand, the can body 3 is sent from the can body feeding turret 26 to the can body holder device 30 of the can body transport turret 27. moving to the right. In this state, after the open end 3a of the can body is inserted into the insertion part 31a of the open end holder, the cam follower 45 moves to the left in the figure, and the recess 41b of the bottom holder 41 is inserted into the can body 3. The opening end 3a is inserted until the end surface of the open end 3a contacts the stepped portion 31d. Immediately, the vacuum hole 41m is connected to a vacuum device by the operation of a vacuum valve (not shown), and the bottom of the can body 3 is vacuum-adsorbed to the bottom holder 41.

The can body 3 revolves in the direction of the arrow W, and while being rotated in the direction of the arrow R via the gear 49 and the clutch 48, the open end 3a of the can body 3 is induction heated by the heating coil 37 to a temperature that allows thermal bonding. Reach the thermal bonding starting point B of thermal bonding station B.

Just before reaching the starting point B1, the club 48 opens.

When reaching the starting point B1, the opening end 3a of the can body is moved by the driving roll 29 through the opening holder 31 so that the peripheral speed n1 of the outer peripheral surface thereof is equal to the peripheral speed n2 of the peripheral surface of the pasting roll 21. Alternatively, it is rotated (rotated) in the direction of arrow R at a speed slightly higher than the circumferential speed n2.

The open end 3a moves in the radial direction of the turret 27 so that the axis 3b of the can body moves along the trajectory 40 at the same time.
In other words, the thermally bonded portion 21 moves approximately in the radial direction of the revolution.
The film piece 11 on a is coated with glitter (not shown) in advance.
is thermally bonded to the coated open end 3a under a predetermined pressure. When the open end 3a reaches the thermal bonding end point B2 and the thermal bonding ends, the rotation is stopped and the heating coil 57
is deenergized, and the can body 3 with the film piece 11 thermally bonded to the open end 3a reaches the can body delivery turret 28 while continuing to revolve, and is delivered to the next process.

Clutch 48 is then closed.

The present invention is not limited to the above examples, and for example, the present invention can be used to attach a film piece such as a sealing chip to the outer peripheral surface of a cylindrical body other than a can body (including an adhesive layer, a glue layer, etc.). It can also be applied to Therefore, the material for the film piece is selected from paper, metal foil, woven fabric, or a laminate thereof depending on the purpose of use.

Further, in the above embodiment, the drive roll 29 is the adhesive roll 21.
Although the inner cylinder 20 is shared with the inner cylinder 20, each may be configured to have a separate inner cylinder. In this case, the drive roll may rotate the bottom holder by contacting the outer peripheral surface of the bottom holder instead of the opening holder. Alternatively, two drive rolls may be provided to drive the opening holder and the bottom holder.

(Effects of the Invention) According to the present invention, since the film pieces are attached to the outer peripheral surface of the cylindrical body while continuously revolving the cylinder, there is an effect that high-speed production is possible.

Furthermore, since the cylindrical body is rotated on its own axis at a speed where the circumferential speed of its outer peripheral surface is equal to or slightly higher than the circumferential speed of the circumferential surface of the adhering roll, the film pieces are attached. This has the effect that there is no risk of cutting or meandering.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an example of a metal can with a can body formed by applying the present invention, and FIG. 2 is a longitudinal cross-sectional view of an example of a metal can that is an embodiment of the present invention, taken along the line ■-■ in FIG. Longitudinal cross-sectional view, Figure 3 is the 2nd
FIG. 3 is a cross-sectional view taken along line III-III in the figure. 3... Can body (cylindrical body), 3b... Axial center, 11...
Film piece, 21... Adhesive roll, 27... Can body conveyance turret, 29... Drive roll, 31... Opening wing hole □/-132... Support body, 34...
Cam roller, 35... plate cam, 35a... cam surface,
40... Trajectory of the axis of the can body, 41... Bottom holder, B... Thermal bonding station (adhesion station).

Claims (2)

[Claims] (1) In a method of attaching a piece of film on the circumferential surface of an adhesive roll to the outer circumferential surface of a cylindrical body, the cylindrical body is continuously revolved, and the cylindrical body is moved in the same flow direction with respect to the direction of revolution. While moving along the applicator station opposite the applicator roll that rotates, the trajectory of the axial center of the cylinder is coaxial with the applicator roll and its radius is The cylindrical body is moved approximately in the radial direction of the revolution so that it becomes part of a virtual cylindrical surface that is slightly smaller than the sum of the radius of the surface, the thickness of the film piece, and the radius of the outer peripheral surface of the cylindrical body. , and the cylindrical body is rotated in the same flow direction with respect to the revolution direction at a speed where the peripheral speed of the outer peripheral surface is equal to or slightly higher than the peripheral speed of the peripheral surface of the adhesive roll, and A method for adhering a film piece, characterized in that adhesion is carried out by bringing the outer peripheral surface of a cylindrical body into contact with the film piece under pressure. (2) A device for pasting a film piece on the circumferential surface of a pasting roll onto the outer peripheral surface of a cylindrical body, the device comprising: a pasting roll, a turret that continuously rotates in the same flow direction as the pasting roll; a rotatable holder that holds the cylindrical body so that the axial center of the cylindrical body is parallel to the axial center of the pasting roll; a holder that is movably attached to the turret in a radial direction of the turret; a support that pivotally supports the cylindrical body, and engages with a cam follower provided on the support to maintain the axis of the cylindrical body while the cylindrical body revolves along a pasting station opposite the pasting roll. A virtual cylinder whose locus is coaxial with the adhesive roll and whose radius is slightly smaller than the sum of the radius of the outer peripheral surface of the adhesive roll, the thickness of the film piece, and the radius of the outer peripheral surface of the cylindrical body. a fixed cam for moving the support in the radial direction of the turret so that it becomes part of a surface, and in contact with the circumferential surface of the holder at the application station;
Rotate the holder in the same flow direction as the sticking roll and so that the circumferential speed of the outer circumferential surface of the cylindrical body is equal to or slightly higher than the circumferential speed of the circumferential surface of the sticking roll. , a film piece sticking device comprising a drive roll coaxial with the sticking roll.