JPH1035616A - Sheet roll charging device of wrapping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet roll-charging device of a wrapping machine, in which even film rolls having different widths can be easily and rapidly equipped and the film sheet can be accurately let out of the film roll. SOLUTION: A sheet roll-charging device is provided with a pair of right and left side reel members 22, 24 on a hollow reel shaft 10, a feed structure having a screw shaft 30 arranged in the reel shaft 10 to transfer respective side reel members 22, 24 to mutually approaching or separating direction and a pair of reciprocating members 36, 38, a fitting claw 54 continually connecting the side reel member 24 and the reciprocating member 38, and a male screw thread sleeve 70 screwed in a female screw member 68 of the reel shaft 10 side to finely adjust the position in the axial direction of the screw shaft 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overwrapping machine for wrapping articles to be packaged, and to a sheet roll mounting apparatus for feeding out a wrapping sheet.

[0002]

2. Related Art This type of wrapping machine is for wrapping an article to be packaged with a wrapping sheet piece, and the wrapping sheet piece cuts a wrapping sheet fed from a sheet roll into a predetermined length. Have been obtained. Therefore, the overwrapping machine is provided with a mounting device for mounting the sheet roll, the mounting device includes a rotatable and cantilevered reel shaft and a pair of the reel shaft mounted on the reel shaft. And a side reel member, and these side reel members constitute a reel of a sheet roll. One side reel member located on the free end side of the reel shaft is provided detachably with respect to the reel shaft, and the other side reel member is fixed to the reel shaft via a set screw.

According to the above-described mounting apparatus, if one side reel member is removed from the reel shaft, the sheet roll can be mounted from the free end side of the reel shaft, and the sheet roll is mounted on the boss of the other side reel member. First fit. Thereafter, by attaching one side reel member to the reel shaft and inserting the boss portion of the one side reel member into the sheet roll, the sheet roll can be sandwiched between the pair of side reel members,
Thereafter, by fixing one side reel member to the reel shaft, the mounting of the sheet roll is completed.

[0004]

In the case of the above-described type of mounting device, if the mounting position of the sheet roll is deviated from the proper position, that is, regarding the feeding of the packaging sheet from the sheet roll, the center line of the feeding of the wrapping sheet is determined. If it is not positioned correctly with respect to the center axis of the packaged item,
When the package sheet is folded by the package, the package sheet is shifted left or right with respect to the package. In such a state, the overlapping position of the subsequently folded side flap may be shifted, or the overlapping itself may not be possible. Such inconvenience becomes more remarkable as the thickness of the article to be packaged becomes thinner.

When the above-described problem occurs, it is necessary to adjust the mounting position of the sheet roll, that is, the mounting position of the pair of side reel members with respect to the reel shaft. However, as described above, since the other side reel member is fixed to the reel shaft via a set screw,
If the set screw is not loosened, the position adjustment of the other side reel member cannot be performed, and the sheet roll itself must be removed from the reel for the position adjustment, and the position adjustment is not easy.

When the width of the sheet roll to be mounted on the reel is different, it is necessary to adjust the position of the other side reel member in accordance with the width of the sheet roll. The present invention has been made based on the above-mentioned circumstances, and its object is to easily mount a sheet roll having an arbitrary width, and to easily perform positioning of mounting and subsequent positioning adjustment. It is an object of the present invention to provide a sheet roll mounting device for an overwrapping machine that can perform the operation.

[0007]

The above object is achieved by the present invention. According to a first aspect of the present invention, there is provided an overwrapped sheet roll mounting apparatus comprising: a rotatable cantilever-supported hollow reel shaft; A pair of side reel members, which are provided to be spaced apart from the center defined on the axis of the shaft at equal intervals and constitute a reel of the sheet roll, and have a screw shaft arranged concentrically within the reel shaft, The rotation of the screw shaft is converted into a contact / separation movement of a pair of side reel members on the reel shaft according to the rotation direction, and expansion / contraction means for expanding / contracting an interval between the side reel members is provided on a free end side of the reel shaft. There is provided an engaging means for interrupting the engagement between the one side reel member and the screw shaft side, and an adjusting means for adjusting the axial position of the screw shaft.

According to the first aspect of the present invention, when the engagement between the one side reel member and the screw shaft by the engagement means is released, the one side reel member can be removed from the reel shaft. it can. In this state, the sheet roll is first inserted into the other side reel member from the free end side of the reel shaft, and then the one side reel member is held between the other side reel member by holding the sheet roll therebetween. The seat roll is completed when the side reel member and the screw shaft side are mutually engaged by the engagement means again and the engagement means. The replacement of the sheet roll is also performed in the same manner.

On the other hand, in the case of mounting sheet rolls having different widths between the pair of side reel members, the screw shaft is rotated by the expanding means, and the width of the sheet roll to be mounted between the pair of side reel members is set. In this state, one side reel member is removed from the reel shaft, and the sheet roll is fitted into the other side reel member. Then, after attaching one side reel member on the reel shaft and engaging with the screw shaft side, the screw shaft is rotated by the expanding means to reduce the interval between the pair of side reel members. At the same time that the sheet roll is sandwiched between the side reels, one of the side reel members is also fitted into the sheet roll, and the sheet roll is mounted on the pair of side reel members.

After the sheet roll is mounted, the center of the width of the sheet roll is shifted from the center of the reel shaft, and the center line of the package sheet fed from the sheet roll is shifted left or right with respect to the axis of the article to be packaged. In such a situation, the position of the screw shaft is displaced in the axial direction together with the pair of side reel members via the adjusting means, whereby the center in the width direction of the sheet roll is finely adjusted left and right.

The engaging means in the sheet roll mounting device according to the second aspect is rotatably provided on one of the side reel member and one of the screw shaft sides, and is capable of intermittently connecting between the screw shaft side and the side reel member. In this case, the connection between one side reel member and the screw shaft side is interrupted only by rotating the claw member.

The adjusting means in the sheet roll mounting device according to the third aspect is a female screw member provided in the free end of the reel shaft, and is screwed into the female screw member so as to be rotatable with respect to the screw shaft and to rotate the screw shaft. A male screw sleeve that moves integrally with the screw shaft in the axial direction is provided.In this case, when the screwing of the male screw sleeve is advanced or retracted with respect to the female screw member,
The screw shaft is displaced in the axial direction without its rotation.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, the flow of an article to be packaged and a wrapping sheet in an overwrapping machine is schematically shown. The articles to be packaged are thin disk cases containing compact discs, and these articles to be packaged A0 are transported along a predetermined transport path. An automatic supply unit for the packaged product A0 is provided at an upstream portion of the transport path, and the automatic supply unit can intermittently send the packaged product A0. A packaging turret is arranged on the downstream side of the automatic feeding unit. In FIG. 1, only the rotation axis 2 of the packaging turret is shown by a one-dot chain line.

A card supply section is arranged between the automatic supply section and the packaging turret, and a film sheet piece Fp as a packaging sheet piece is provided at an entrance position 4 of the packaging turret.
Are sequentially supplied. The card supply unit
The card B is supplied one by one toward the individual packaged articles A0 on the transport path, and the card B is folded into the head end of the packaged article A0 with the intermittent transport of the packaged article A0, The head end is covered. Thereafter, the packaged product A0 is inserted into the pocket of the packaging turret together with the film sheet piece Fp. With this insertion, the film sheet piece Fp is folded into a U-shape with respect to the packaged product A0, and With rotation, the film sheet piece Fp
The upper and lower end flaps are folded into the tail end of the article to be packaged A0 and heat sealed.

When the pocket that has received the packaged article A0 reaches the exit position of the packaging turret, and the packaged article A0 is sent out from the pocket, the left, right, upper, and lower side flaps of the film sheet piece Fp are attached to the packaged article A0. At the same time, primary heat sealing is performed on these side flaps. At this point, the packaging of the packaged product A0 is completed, and the packaged product A0 is obtained. After this,
The package A1 is subjected to secondary heat sealing on its side flaps, and is conveyed to the next step.

A film roll FR is rotatably arranged above the transporting path of the package A1.
This film roll FR is positioned downstream of the packaging turret. The film sheet FS unwound from the film roll FR is placed at the entrance position 4 of the packaging turret.
And cut into a predetermined length at the entrance position 4. The feeding of the film sheet FS from the film roll FR is performed by a feed roller and a pinch roller, and these rollers are arranged on the entrance position 4 side of the packaging turret.

A tear tape bobbin TB is disposed in the middle of the supply path of the film sheet FS, and the tear tape TT fed from the tear tape bobbin TB is attached to one side edge of the film sheet FS. It has become. Therefore, the film sheet piece Fp is a packaging sheet material having the tear tape piece Tp, and FIG.
As is clear from the above, the packaged product A1 wrapped by the film sheet piece Fp can easily tear the packaging film along the tear tape piece Tp by pulling the tip of the tear tape piece Tp and pulling it. . In FIG. 2, upper and lower end flaps of the packaging film and upper and lower side flaps on one side are denoted by reference numerals EF and SF.
Indicated by

Referring next to FIGS. 3 and 4, there is shown an apparatus for mounting a film roll FR, which includes a hollow reel shaft 10. This reel shaft 10
Extends horizontally, one end of which extends through the device frame 11, and a bearing portion 12 provided on the device frame 11.
And cantilevered. That is, the bearing portion 12 is a bearing disk 14 fixed to the device frame 11.
And a bearing disk 18 attached to the apparatus frame 11 via a plurality of spacer tubes 16 and having a diameter larger than that of the bearing disk 14.
One end of a reel shaft 10 is rotatably supported by 8.
The spacer tubes 16 are arranged at equal intervals in the circumferential direction of the reel shaft 10, and connection screws 20 are screwed into both ends of each spacer tube 16 via the device frame 11 and the bearing disk 18.

The reel shaft 10 is provided with a reel on which the above-mentioned film roll FR is mounted, and this reel has a pair of side reel members 22 and 24 for sandwiching the film roll FR. In this embodiment, each of the side reel members 22 and 24 comprises a boss 26 slidable on the reel shaft 10 and a reel disk 28 connected to the boss 26. Boss 26 of side reel member 22
Is provided with an insertion claw 29 on its outer peripheral surface, and this insertion claw 29 is attached to the roll core R of the film roll FR.
It is plugged into C.

A screw shaft 30 is arranged concentrically within the reel shaft 10, and screw portions 32 and 34 are formed at both ends of the screw shaft 30, respectively. Here, one threaded portion 32 is a right-handed thread, while the other threaded portion 34 is a left-handed thread. These screw parts 3
Numerals 2 and 34 are screwed into nut-like reciprocating members 36 and 38, respectively, penetrate these reciprocating members 36 and 38, and are supported on the reel shaft 10 via the corresponding reciprocating members. I have.

A guide 40 is provided on the outer peripheral surface of the reciprocating member 36.
Are formed integrally, and the guide 40 extends in the axial direction of the reel shaft 10. On the other hand, the reel shaft 1
A guide slot 42 extending in the axial direction is also formed on the peripheral wall of the reciprocating member 36.
Are slidably fitted. Accordingly, although the reciprocating member 36 cannot rotate with respect to the reel shaft 10, it is movable in the axial direction. The boss 26 of one side reel member 22 is connected to the reciprocating member 36 via a pair of connecting screws 44,
These connecting screws 44 are screwed into the ridges 40 of the reciprocating member 36, and their heads are immersed in the boss 26.

A pair of flat surfaces 4 is provided on the outer peripheral surface of the reciprocating member 38.
6 are formed, and these flat surfaces 46 are reciprocating members 38.
Are diametrically spaced from one another. On the other hand, the reel shaft 10
A pair of guide slots 48 are formed on the peripheral wall of the flat panel so as to face the flat surface 46.
Extend in the axial direction of the reel shaft 10. Guide screws 50 are respectively screwed into the flat surface 46 of the reciprocating member 38, and the heads of the guide screws 50 are slidably fitted into the corresponding guide slots 48, and
It is immersed in the guide slot 48. Therefore, the guide screw 50 prevents the rotation of the reciprocating member 38 with respect to the reel shaft 10, but allows the reciprocating motion in the axial direction.

Further, an engaging hole 52 is formed in one flat surface 46 of the reciprocating member 38, and an engaging claw 54 is fitted into the engaging hole 52 through a guide slot 48 on the corresponding side. I have. As is clear from FIG. 4, the engaging claw 54 is formed integrally with one end of the engaging lever 56, and the center thereof is rotated via the pin 58 on the outer end surface of the boss 26 of the side reel member 24. Mounted freely.
A torsion coil spring 60 extends between the engagement lever 56 and the boss 26.
4 urges the engagement lever 56 in the counterclockwise direction, that is, the direction in which the engagement claw 54 engages with the engagement hole 52 of the reciprocating member 38 in FIG.

In the state shown in FIG. 3, the center of the film roll FR sandwiched between the pair of side reel members 22 and 24 is set at the center defined in the axial direction of the reel shaft 10. Have been matched. That is, the film sheet FS fed from the film roll FR and supplied toward the above-described packaging turret entrance position 4 has its feeding center line positioned with respect to the axis along the transport direction of the article to be packaged A0. .

An extension shaft 62 having a smaller diameter than the screw shaft 30 extends integrally from an end of the screw shaft 30 located on the free end side of the reel shaft 10, and its tip is located outside the free end of the reel shaft 10. It is projected to. A rod-shaped handle 66 is connected to a distal end of the extension shaft 62 via a universal joint 64. Accordingly, the handle 66 can take a posture positioned on the axis of the extension shaft 62 as shown by a solid line in FIG. 3 and a posture perpendicular to the axis as shown by a two-dot chain line. .

In the free end of the reel shaft 10, a female screw member 68 is fixed to the inner peripheral wall.
Is threaded with a male thread sleeve 70. The male screw sleeve 70 protrudes from the free end of the reel shaft 10, and a flange 72 having a smaller diameter than the reel shaft 10 is formed at the protruding end. On the other hand, a peripheral groove is formed in the outer peripheral surface of the extension shaft 62 near the universal joint 64, and a connecting disk 74 having a smaller diameter than the flange 72 is rotatably fitted in the peripheral groove. Connecting disk 74 and flange 72
Are connected to each other via a plurality of screws, whereby the male screw sleeve 70 can move integrally with the extension shaft 62, that is, the screw shaft 30, in the axial direction of the extension shaft 62. The connecting disk 74 is specifically composed of a pair of semicircular disk halves,
A connecting disk 74 is obtained by combining these disk halves in the circumferential groove of the extension shaft 62.

A bush 76 is provided between the male screw sleeve 70 and the extension shaft 62, and this bush 76 supports the male screw sleeve 70 rotatably with respect to the extension shaft 62. Therefore, even if the male screw sleeve 70 is rotated with screwing or screwing with respect to the female screw member 68,
The rotation is not transmitted to the screw shaft 30, and conversely, even if the screw shaft 30 is rotated, the rotational force is not transmitted to the male screw sleeve 70.

Further, a lock nut 78 is screwed into the male screw sleeve 70, and accidental rotation of the male screw sleeve 70 is prevented by tightening the lock lot 78. In the reel shaft 10, the above-described bearing 1
The brake drum 8 is located between the side reel member 22 and the side reel member 22.
0, and the brake drum 80 is positioned on the bearing disk 14 side. A brake shoe 82 can slide on the outer peripheral surface of the brake drum 80, and the brake shoe 82
And is attached to the shoe lever 86 via. The lower end of the shoe lever 86 has the device frame 1 described above.
1 is rotatably supported via a support shaft 88, and extends upward on the side of the plate drum 80.

As is apparent from FIG.
A connecting rod 90 is slidably penetrated through the upper end of the connecting rod 90. The connecting rod 90 extends horizontally above the reel shaft 10 in a direction perpendicular to the reel shaft 10. A spring seat 92 made of a nut or the like is provided at one end of the connecting rod 90.
The spring seat 92 and the shoe lever 86 are fixed.
A pusher ring 94 is provided at the portion of the connecting rod 90 between
Are slidably mounted. A compression coil spring 96 is bridged between the pusher ring 94 and the spring seat 92 so as to surround the connecting rod 90, and the compression coil spring 96 is
4 is urged toward the shoe lever 86. Therefore, in the state shown in FIG. 5, the pusher ring 94 urges the shoe lever 86 to rotate toward the reel shaft 10 so that the brake shoe 82 applies a predetermined pressing force to the brake drum 80. And applies a braking force to the rotation of the brake drum 80, that is, the rotation of the reel shaft 10.

One end of the connecting rod 90 is connected to a tension lever 98. The base end of the tension lever 98 is rotatably supported by the apparatus frame 11 via a support shaft 100. Note that the tension lever 98 is not shown in FIG. A release ring 102 is attached to the connecting rod 90 between one end thereof and the shoe lever 86, more specifically, on the shoe lever 86 side.

A pair of upper and lower tension rollers 104 and 106 are rotatably supported at the upper end of the tension lever 98. The tension rollers 104 and 106 extend above the film roll FR in the axial direction. On the other hand, a roller holder 108 is disposed above the film roll FR, and the upper, middle, and lower guide rollers 110, 112, and 114 are rotatably supported by the roller holder 108, and these guide rollers are also used as film guides. It extends in the axial direction of the roll FR. The roller holder 108 itself is supported on the apparatus frame 11 via a support arm (not shown).

As apparent from FIG. 5, the film roll F
First, the film sheet FS from R
8, the guide roller 110 is guided to the tension roller 104 of the tension lever 98 via the lower guide roller 110, and then from the tension roller 104 to the tension roller 106 of the tension lever 98 via the intermediate guide roller 112 of the roller holder 108. From the tension roller 106 to the upper guide roller 11 of the roller holder 108.
The paper is fed to the space between the feed roller and the pinch roller through the feed roller 4, and is supplied toward the entrance position 4 of the packaging turret by the feed roller and the pinch roller.

When the feeding of the film sheet FS from the film roll FR is started, the film rolls FR,
That is, the reel shaft 10 is rotated against the braking force from the brake shoes 82 applied to the brake drum 80. At this time, the film sheet FS fed from the film roll FR attracts the tension rollers 104 and 106 by the tension, and the tension lever 98 is directed toward the roller holder 108 as shown by a two-dot chain line in FIG. Is rotated.
With the rotation of the tension lever 98, the connecting rod 90 moves toward the shoe lever 86, so that the release ring 102 abuts on the upper end of the shoe lever 86 and resists the urging force of the compression coil spring 96. Then, the user attempts to rotate the shoe lever 86 in a direction away from the brake drum 80. As a result, the brake drum 80
, That is, the pressing force of the brake shoe 82, that is, the braking force is reduced. On the other hand, the film sheet FS
When the tension of the brake drum 80 decreases, the shoe lever 86 is moved by the biasing force of the compression coil spring 96.
And the braking force of the brake shoe 82 is increased. Accordingly, during the feeding of the film sheet FS from the film roll FR, the film sheet FS
Can be given a certain tension.

As is clear from the above description, the feeding of the film sheet FS from the film roll FR is performed intermittently every predetermined length in synchronism with the intermittent conveyance of the article to be packaged and the intermittent rotation of the packaging turret. Done in When the remaining amount of the film roll FR is exhausted and the film roll FR is replaced with a new one, first, the engaging lever 56 of the side reel member 24 is rotated, and is indicated by a two-dot chain line in FIG. Thus, the engaging claw 54 is removed from the engaging hole 52 of the reciprocating member 38, and the side reel member 24 and the reciprocating member 3
Release the connection with 8. In this state, as shown by a two-dot chain line in FIG.
By sliding toward the free end side of 0, the side reel member 24 can be pulled out from the reel shaft 10 and the film roll FR can be removed from the other side reel member 22. At this time, the handle 66 described above is on the axis of the reel shaft 10, and does not hinder the removal of the side reel member 24 and the film roll FR.

Thereafter, when a new film roll FR is fitted to the boss 26 of the other side reel member 22,
At this time, the insertion claws 29 of the boss 26 are inserted into the roll core RC of the film roll FR, so that the film roll FR is firmly held by the side reel member 22. In this state, the side reel member 24 is connected to the reel shaft 1.
On the film roll F.
When the film roll FR is inserted into the R roll core RC, the film roll FR can be sandwiched between the side reel members 22 and 24, that is, mounted. Thereafter, the engaging claw 54 of the engaging lever 56 of the side reel member 24 is inserted into the engaging hole 52 of the reciprocating member 38, and the work of exchanging the film roll FR is completed.

On the other hand, when the width direction of the film roll FR to be mounted is different, the handle 66 is turned while the handle 66 is set up as shown by a two-dot chain line in FIG.
When the screw shaft 30 is rotated in one direction via the extension shaft 62, the left and right reciprocating members 36 and 38 screwed to the right and left screws 32 and 34 respectively move the corresponding side reel members 22 and 24. Accordingly, the reels 10 move toward and away from each other about the center of the reel shaft 10. That is, since the reciprocating member 36 and the side reel member 22 are mutually connected by the connection screw 44, the side reel member 22 moves together with the reciprocating member 32, and the side reel member 24 engages with the reciprocating member 38. Since the side reel member 24 is connected via the claw 54, the side reel member 24 can also move integrally with the reciprocating member 38. Therefore, rotation of the screw shaft 30 causes these side reel members 2
It is possible to provide a desired space between the film rolls 2 and 24, that is, a space slightly wider than the width of the film roll FR to be mounted.

In this state, if the side reel member 24 is removed from the reel shaft 10 as described above, the reel shaft 1
0 on the side reel member 22 with the film roll FR.
Can be fitted. Then, after attaching the side reel member 24 on the reel shaft 10, the screw shaft 30 is rotated again, and the pair of side reel members 22,
By moving the film reels 24 in a direction approaching each other, the boss 26 of the side reel member 24 is fitted into the roll core RC of the film roll FR, and at the same time, the film roll FR is sandwiched between the side reel members 22 and 24.

Here, the pair of side reel members 22 and 2
Reference numeral 4 denotes a center of the reel shaft 10 and a distance from the center of the reel shaft 10. Therefore, the film roll FR is sandwiched between the side reel members 22 and 24, and at the same time, the width center of the film roll FR with respect to the center of the reel shaft Will be positioned. Therefore, even if the film rolls have different widths, the film roll can be easily and quickly mounted between the pair of side reel members 22 and 24.

However, if the center of the width of the film roll FR mounted on the reel shaft 10 is displaced from the center of the reel shaft 10, first, the lock nut 78 of the male screw sleeve 70 described above is loosened. By turning the male screw sleeve 70 according to the shift direction and the shift amount, the male screw sleeve 70 can be advanced and retracted with respect to the female screw member 68 in the reel shaft 10. Here, as described above, since the male screw sleeve 70 and the screw shaft 30 move integrally in the axial direction, the axial position of the screw shaft 30 can be finely adjusted by the reciprocation of the male screw sleeve 70. Accordingly, the screw shaft 30 is displaced in the axial direction with the film roll FR between the pair of side reel members 22 and 24. As a result, the width center of the film roll FR is accurately positioned at the center of the reel shaft 10. Can be. Thereafter, the lock nut 78 is tightened again to complete the positioning adjustment.

When the center of the width of the film roll FR can be accurately positioned at the center of the reel shaft 10 as described above, the film sheet FS can be fed out from the film roll FR on a regular line. The article to be packaged A0 can be accurately and reliably packaged by the film sheet piece Fp obtained from the film sheet FS. In other words, as described above, the overlapping position of the side flaps SF on the packaged product A1 is displaced, and the aesthetic appearance is impaired, and the overlapping is insufficient, and the heat sealing is not performed. It won't be perfect.

The present invention is not limited to the above-described embodiment, and the specific shape and configuration of each member can be variously modified, and the sheet roll is not limited to a film roll. It may be a paper roll.

[0042]

As described above, according to the sheet roll mounting apparatus of the first aspect, even if the sheet rolls have different widths, the sheet roll can be mounted easily and quickly, and the sheet roll can be mounted. Even later, the center of the width of the sheet roll can be adjusted to the center of the reel shaft. As a result, even if the thickness of the article to be packaged is small, the article to be packaged can be accurately and reliably packaged.

According to the second aspect of the present invention, the connection between the one side reel member and the screw shaft can be interrupted only by rotating the claw member. Can be easily removed, and the work of replacing the sheet roll can be easily performed. According to the sheet roll mounting device of the third aspect, the axial position of the screw shaft can be finely adjusted only by adjusting the screwing amount of the male screw sleeve into the female screw member on the reel shaft side, and the width center of the sheet roll is adjusted to the reel shaft. Positioning can be easily performed at the center.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the flow of an article to be packaged and a film sheet in an overwrapping machine.

FIG. 2 is a perspective view showing a package.

FIG. 3 is a sectional view showing a film roll mounting device.

FIG. 4 is a diagram showing a relationship between an engagement claw of an engagement lever and an engagement hole.

FIG. 5 is a diagram for explaining feeding of a film sheet from a film roll.

[Explanation of symbols]

 Reference Signs List 10 reel shaft 22 side reel member 24 side reel member 30 screw shaft (expansion / reduction means) 32 right-hand screw (expansion / reduction means) 34 left screw (expansion / reduction means) 36 reciprocating member (expansion / reduction means) 38 reciprocation member (expansion / reduction means) 52 engagement hole (Engagement means) 54 engagement claw (engagement means) 56 engagement lever (engagement means) 60 torsion coil spring (engagement means) 62 extension shaft 66 handle (expansion / retraction means) 68 female screw member (adjustment means) 70 male screw Sleeve (adjustment means) 76 Bush

Claims (3)

[Claims] 1. An overwrapping machine for overwrapping and packaging an article to be packaged by a packaging sheet fed from a sheet roll, comprising: a hollow reel shaft rotatably supported by a cantilever; and an axial line of the reel shaft. A pair of side reel members, which are provided opposite to each other at equal intervals from a defined center and constitute a reel of the sheet roll, and have a screw shaft concentrically arranged in the reel shaft; Means for converting the rotation of the pair of side reel members into and out of contact with and separating from the pair of side reel members on the reel shaft in accordance with the direction of rotation, and expanding and contracting the space between the side reel members. An engaging means for interrupting engagement between one of the side reel members and the screw shaft side, and an adjusting means for adjusting an axial position of the screw shaft. Sheet roll mounting apparatus overwrap machine, characterized. 2. The engaging means is rotatably provided on one of the one side reel member and the screw shaft side, and is capable of intermittently connecting between the screw shaft side and the one side reel member. The sheet roll mounting device for an overwrapping machine according to claim 1, further comprising a pawl member to be connected. 3. The adjusting means comprises: a female screw member provided in a free end of the reel shaft; and a screwing member which is screwed into the female screw member so as to be rotatable with respect to the screw shaft and in an axial direction of the screw shaft. 3. The sheet roll mounting device for an overwrapping machine according to claim 1, further comprising a male screw sleeve that moves integrally with the screw shaft.