JP2011152972A - Roll body holder, and film packaging machine having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll body holder of a film packaging machine, which easily changes a roll body with a packaging film being wound therearound, and to provide a film packaging machine having the same. <P>SOLUTION: The roll body holder includes a rod 20 passing through the core part of a roll body 10 with a long film 14 being wound therearound, and first and second end caps 30, 40 which are fitted in both ends of the core part on the rod 20 to hold the roll body 10. The first end cap 30 includes a flange part 38 with a core part end being abutted thereon, a large diameter part 34 as a fit-in part in which the core part is abutted on the flange part 38 and fitted in the core part, and a slope part 35 which is gradually expanded toward the large diameter part 34 and reaches the large diameter part 34. The slope part 35 is formed in a guide part in which one end side of the core part is guided to an inclined surface of the slope part 35 by placing the roll body 10 on the slope part 35 at an inner circumferential surface on one end side of the roll body 10 when attaching the roll body 10, and pushing the roll body in the direction of the flange part 38. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a roll body holder and a film packaging machine including the roll body holder.

  A so-called pillow packaging machine or the like is widely known as a film packaging machine for packaging an article using a packaging film wound around a roll body.

  As such a pillow packaging machine, for example, as disclosed in Japanese Patent Application Laid-Open No. 2003-267602 (see FIG. 38), an article supply unit that supplies an article to be packaged, and a film that supplies a packaging film What has a supply part, the packaging part which packages an article | item with a film, and the carrying-out part which carries out a package is known as a general structure.

JP 2003-267602 A (see FIG. 38)

Such a film packaging machine needs to replace | exchange regularly the roll body which wound the film for packaging to the film supply part which supplies the film for packaging. In a general film packaging machine, the film supply unit is fixed to the main body frame of the film packaging machine, and the film supply unit is provided with a configuration that allows the roll body to be replaced from the front side of the packaging machine. It has been.
A configuration is employed in which after a used roll body is pulled out from a holding rod provided in the film supply unit, a new roll body is inserted into the holding rod and replaced. In general, the operation of such a film wrapping machine is often performed by a woman or an elderly person, and when the roll body is replaced, even if the roll body can be pulled out, it is heavy. Work such as mounting a new roll body is a powerful work, so it can be said that the work alone is extremely difficult.

The operation when the roll body is mounted on the film supply unit will be specifically described.
After inserting the holding rod of the film supply unit into the roll core, the holding rod and the roll are used to prevent idling of the roll body in the film supply unit and shaking of the rotating shaft when the roll body rotates. It is necessary to fix the core part of the body by bringing it into close contact. In order to bring the holding rod and the roll body into close contact with each other, as shown in FIGS. 11 to 14, the holding rod 200 is connected to one fixing tool 250 attached to the body frame 105 side portion of the film packaging machine. One end cap 210 has a configuration in which a winding core portion (hollow portion of the cylindrical body 222) that is a rotating shaft of a roll body 220 formed by winding the film 224 around the cylindrical body 222 is fitted.

  With such a configuration, the core portion of the roll body 220 (the hollow portion of the cylindrical body 222) is inserted into the holding rod 200 (FIG. 11), and the insertion-side tip portion of the roll body 220 is the first end cap. When the attachment position 210 is reached, the roll body 220 must be pushed into the holding rod 200 while lifting the insertion-side tip portion of the roll body 220 (FIG. 12). Then, after inserting the other second end cap 240 into the holding rod 200, the rear end portion of the roll body 220 is lifted and the roll body 220 is further pushed into the holding rod 200, and then the roll body 220. The other second end cap 240 is fitted between the core portion of the rear end portion and the holding rod 200 (FIG. 13). Finally, the other fixing tool 250 for fixing the other second end cap 240 is fixed to the holding rod 200, and the roll body 220 is attached to the holding rod 200 (FIG. 14).

In FIG. 14, the first end cap 210 is mounted in a state where the distal end portion thereof coincides with the position of the insertion-side distal end portion of the roll body 220, but if the operator pushes the roll body 220 too much, the roll body 220 is moved to. The insertion state (insertion amount) of the first end cap 210 is not constant, and the center position of the film 224 supplied to the packaging unit may be shifted.
Thus, in order to attach the roll body 220 to the holding rod 200, the insertion side distal end portion of the roll body 220 must be lifted with the arm deeply inserted into the back side of the lower part of the film packaging machine, Improvement of the structure is desired in that it is difficult for women and the elderly to work alone, and it is difficult to adjust the mounting position of the roll body 220 on the rod 200 (first end cap 210). It was.

  Therefore, the present invention makes it possible to easily replace the roll body even when a woman or an elderly person with low power is alone, and to make the mounting position of the roll body to the rod constant. An object of the present invention is to provide a roll holder and a film packaging machine having the roll holder.

In order to solve the above-mentioned problems, the present invention has been intensively studied, and as a result, has arrived at the following configuration.
That is, a roll body holder to which a roll body on which a long film is wound is mounted, and a rod that is inserted through the core of the roll body, and is detachably fixed on the rod at an interval. And a first end cap and a second end cap that are fitted into both ends of the core portion to hold the roll body, and the first end cap is a flange with which the end portion of the core portion abuts. Part, and in a state where the core part is in contact with the flange part, a fitting part that fits into the core part, a slope part that gradually increases in diameter toward the fitting part and reaches the fitting part, The slope part is mounted on the slope part by the inner peripheral surface on one end side of the core part when the roll body is mounted, and pushed in the direction of the flange part. One end side of the winding core portion is the inclined surface of the slope portion Guided while contacting a roll holder, wherein the fitting portion at one end of the winding core portion in contact with the position on the flange portion is formed in the guide portion for fitting.

  An article supply unit for supplying the article; a film supply unit on which a film for packaging an article formed on the roll body can be mounted; and a packaging unit for packaging the article with the film unwound from the film supply unit; An invention as a film packaging machine comprising a carry-out section for carrying out a package in which the article is film-wrapped by the packaging section, and the roll body holder is used in the film supply section. There is also.

According to the roll body holder and the film packaging machine including the roll body according to the present invention, after inserting the rod into the core of the roll body, the rotation axis of the roll body can be obtained simply by pushing the roll body into the rod. It can be made to insert in the state which positioned the core part of the roll body which becomes the 1st end cap attached to the rod. The first end cap attached to the rod has a slight difference in diameter from the outer dimension of the rod at the boundary portion with the rod on the roll body mounting side, and the slope of the slope portion is formed loosely. The first end cap can be fitted into the core portion of the roll body simply by pushing the insertion side tip of the body into the rod. For this reason, it is not necessary to lift the roll body with the arm inserted deeply into the film supply section in an unnatural posture, and the labor at the time of replacing the roll body can be greatly reduced.
Further, since a flange portion serving as a stopper is provided at the insertion end of the first end cap, if the roll member is pushed in until the insertion end of the roll member comes into contact with the flange portion, the roll member is pushed in. The position can be regulated. This makes it possible to mount the roll body at an appropriate position of the rod without the need to finely adjust the pushing of the roll body into the rod.

It is principal part sectional drawing which shows the state which mounted | wore the roll body holder concerning this embodiment with the roll body. It is a front view of the 1st end cap in the roll body holder of FIG. It is sectional drawing in the AA in FIG. It is a front view which shows an example of a structure of the film packaging machine which comprises the roll body holder concerning this embodiment. It is sectional drawing which shows the schematic state of each step in the case of mounting | wearing a roll body with the roll body holder of this embodiment. It is sectional drawing which shows the schematic state of each step in the case of mounting | wearing a roll body with the roll body holder of this embodiment. It is sectional drawing which shows the schematic state of each step in the case of mounting | wearing a roll body with the roll body holder of this embodiment. It is sectional drawing which shows the schematic state of each step in the case of mounting | wearing a roll body with the roll body holder of this embodiment. It is sectional drawing which shows an example of other embodiment of the roll body holder concerning this invention. It is sectional drawing which shows an example of other embodiment of the roll body holder concerning this invention. It is sectional drawing which shows the general state of each step in mounting | wearing a roll body to the roll body holder concerning a prior art. It is sectional drawing which shows the general state of each step in mounting | wearing a roll body to the roll body holder concerning a prior art. It is sectional drawing which shows the general state of each step in mounting | wearing a roll body to the roll body holder concerning a prior art. It is sectional drawing which shows the general state of each step in mounting | wearing a roll body to the roll body holder concerning a prior art.

Hereinafter, embodiments of a roll holder according to the present invention and a film packaging machine including the roll holder will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part showing a state in which a roll body is mounted on the roll body holder according to the present embodiment. FIG. 2 is a front view of the first end cap in the roll body holder of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line AA in FIG.
The roll body holder 1 in this embodiment holds a roll body 10 in which a packaging film 14 is wound around an outer peripheral surface of a cylindrical body 12 that is a core portion formed of a synthetic resin or paper. is there. Of course, after the film 14 is wound around the outer peripheral surface of the cylindrical body 12 that is the winding core portion, the cylindrical body 12 is taken out and the roll body 10 composed of only the film 14 may be used. When the roll body 10 composed only of such a film 14 is employed, the hollow part of the roll body 10 corresponds to the core part.

The roll body holder 1 includes a rod 20 that is inserted into a hollow portion of a cylindrical body 12 (hereinafter simply referred to as a cylindrical body 12) that is a winding core, and a first cone that is disposed on the rod 20 and has a truncated cone shape. End cap 30 and a second end cap 40 disposed on the rod 20 for making the rotation axis of the roll body 10 on the first end cap 30 side parallel to the central axis of the rod 20. . The second end cap 40 is detachably mounted on the rod 20 with a required distance from the first end cap 10.
The roll body holder 1 having such a configuration is detachably attached to the main body frame 105 of the film packaging machine in an arrangement in which the first end cap 30 side is the back side.

  In the present embodiment, as shown in FIG. 1, the first end cap 30 and the second end cap 40 are formed in the same shape. A fixing tool 50 is attached to the outer side of the first end cap 30 and the second end cap 40, and the fixing tool 50 is attached and fixed to the rod 20 by screwing or the like. The fixing tool 50 is fixed to the rod 20 by a screw screwed in the radial direction of the rod 20. The first end cap 30 and the second end cap 40 are connected to each other by screws in which screws (both not shown) are screwed into screw holes respectively provided on contact surfaces with the fixture 50, It is attached to the rod 20 via a fixture 50.

As shown in FIG. 2 and FIG. 3, the first end cap 30 is formed in a truncated cone shape whose outline shape is elongated. A portion serving as a bus line connecting the small diameter portion 32 and the large diameter portion 34 of the truncated cone constitutes a slope portion 35 for placing the roll body 10 and sliding the roll body 10 to the large diameter portion 34. In addition, a flange portion 38 is formed at the distal end portion on the free end side of the large-diameter portion 34 that is a fitting portion that is fitted into the core portion of the roll body 10. By inserting the front end portion (core portion end portion) of the roll body 10 into contact with the flange portion 38, the large diameter portion 34 is fitted into the core portion of the roll body 10 in a state where the roll body 10 is positioned. Can do.
Further, an insertion hole 36 for inserting the rod 20 is formed in the rotating shaft portion of the first end cap 30. The diameter dimension φ1 of the small-diameter portion 32 of the first end cap 30 is shown in FIG. 3 because a member thickness necessary to withstand an impact when the insertion-side tip portion of the roll body 10 collides is secured. Thus, the rod 20 is formed to have a diameter slightly larger than the outer diameter φr.

The outer diameter dimension (φ2) of the large-diameter portion 34 that is the fitting portion of the first end cap 30 is formed to be equal to the inner diameter dimension of the cylindrical body 12, and the hollow portion of the cylindrical body 12 that is the winding core portion. It is formed over a required range in the insertion direction. By using the first end cap 30 formed in this way, the hollow portion of the cylindrical body 12 can be surely aligned with the rotation axis of the rod 20, and the packaging film 14 is unwound in a stable state. It becomes possible.
As described above, if the attachment position of the first end cap 30 to the rod 20 is adjusted in advance, the center position of the film 14 in the width direction of the film 14 with respect to the film packaging machine 100 to be described later is set. This is advantageous because it can be supplied in alignment with the central portion.

  In addition, the slope angle of the slope portion 35 that connects the small diameter portion 32 and the large diameter portion 34 of the first end cap 30 with respect to the axis of the rod 20 is formed at an angle of 12 ° or less. Further, at least the slope portion 35 of the first end cap 30 is covered with a low friction agent (for example, a fluororesin typified by Teflon (registered trademark)) capable of reducing the friction coefficient. As described above, the slant angle of the slope portion 35 is relaxed and the surface treatment for reducing the frictional force is performed, so that the roll body 10 to the first end cap 30 (roll body holder 1) can be reduced. The mounting operation can be easily performed.

Next, a method for attaching the roll body 10 to the film packaging machine 100 including the roll body holder 1 according to the present embodiment will be described. FIG. 4 is a front view illustrating an example of a configuration of a film packaging machine (pillow packaging machine) including the roll body holder according to the present embodiment. Moreover, FIGS. 5-8 is sectional drawing which shows the schematic state of each step at the time of mounting | wearing a roll body to the roll body holder of this embodiment, respectively.
The schematic configuration of the film packaging machine 100 in the present embodiment is the same as that of the film packaging machine 100 in the prior art. That is, as shown in FIG. 4, an article supply unit 110 that supplies an article B to be packaged, a film supply unit 120 that supplies a packaging film 14, and a packaging unit 130 that packages the article B with the film 14 And a carry-out unit 140 for carrying out the package H. Since the configurations of the article supply unit 110, the packaging unit 130, and the carry-out unit 140 in the pillow packaging machine are known, detailed description thereof is omitted here.

  First, as shown in FIG. 5, the fixture 50 and the first end cap 30 are attached to the rod 20 (near the body frame 105 side) of the roll body holder 1 disposed in the film supply unit 120 of the film packaging machine 100. Position and install each. The fixture 50 is fixed to the rod 20 by screwing in the radial direction of the rod 20, and the first end cap 30 is disposed in a direction perpendicular to the contact surface between the first end cap 30 and the fixture 50. The screw 20 is attached to the rod 20 via the fixture 50 by inserting the screw through the screw hole. The attachment position of the fixture 50 to the rod 20 can be appropriately changed according to the width dimension of the roll body 10 to be attached.

  As shown in FIG. 6, the operator of the film packaging machine 100 inserts the rod 20 into the hollow portion of the cylindrical body 12 that is the core of the roll body 10 and suspends the roll body 10 from the rod 20. Then, the roll body 10 is pushed into the main body frame 105 side along the axis of the rod 20. The roll body 10 is continuously pushed into the main body frame 105 side even after the insertion-side distal end portion (winding core end portion) of the roll body 10 reaches the position of the small diameter portion 32 of the first end cap 30. On the back side from the position of the small diameter portion 32, although the load when the roll body 10 is pushed into the rod 20 is slightly increased, it is not necessary to lift the roll body 10. As shown in FIG. 5, the inner peripheral surface of the insertion end of the roll body 10, which is the inner peripheral surface on one end side of the core, is placed on the slope portion 35 (the bus bar of the truncated cone) of the first end cap 30. Then, it is gradually guided to the large diameter portion 34 along the slope portion 35.

At this time, in addition to the inclination angle of the slope portion of the first end cap 30 with respect to the axis of the rod 20 being 12 ° or less, the surface treatment with the low friction agent for reducing the frictional force in the slope portion 35 is performed. Therefore, even a woman or an elderly person can easily go to the large-diameter portion 34 along the slope surface of the slope portion 35 with the inner peripheral surface of the insertion-side tip portion of the roll body 10 placed on the slope portion 35. And can be induced.
If the step difference due to the dimensional difference between the outer diameter dimension φr of the rod 20 and the outer diameter dimension φ1 of the small diameter portion 32 of the first end cap 30 causes the insertion resistance of the distal end portion of the roll body 10 to be inserted into the slope portion 35. When it is too large, curved surface processing (formation of a so-called rounded portion) that smoothly connects the insertion-side tip portion of the cylindrical portion 12 and the inner peripheral surface of the insertion-side tip portion of the cylindrical portion 12 may be performed.

The large-diameter portion 34 that is the fitting portion of the first end cap 30 is formed to have a diameter that is equal to the inner diameter of the hollow portion of the cylindrical body 12 that is the winding core portion, and to the hollow portion of the cylindrical body 12. It is provided in a required range in the insertion direction (the axial direction of the rod 20). That is, when the insertion-side distal end portion of the roll body 10 reaches the large-diameter portion 34, the load when the roll body 10 is pushed down is reduced (returns to the initial load state in which the rod 20 is inserted into the roll body 10). As a result, the operator can grasp that the large diameter portion 34 has been fitted into the core portion of the roll body 10.
Moreover, since the flange part 38 formed in larger diameter than the large diameter part 34 is provided in the edge part by the side of the main body frame 105 of the large diameter part 34, an operator rods the roll body 10 more than necessary. Even if it is going to be inserted to the back side (main body frame 105 side) 20, the insertion-side tip of the roll body 10 abuts on the flange portion 38 to prevent over-insertion of the roll body 10, and to the roll body holder 1. The roll body 10 can be mounted while being always positioned.

  After a part of the distal end portion of the roll body 10 on the insertion side is brought into contact with the flange portion 38, the operator inserts the second end cap 40 into the rod 20 as shown in FIG. 40 is attached to the rotating shaft of the roll body 10 (the hollow portion of the cylindrical body 12). In the present embodiment, the second end cap 40 is formed in the same manner as the first end cap 30, and the same surface treatment is applied to the slope portion. Therefore, when the second end cap 40 is mounted. However, it is not necessary to lift the near side portion of the roll body 10. Also in this respect, the work load at the time of mounting the roll body 10 is greatly reduced as compared with the prior art. After the second end cap 40 is attached, if the fixture 50 is attached to the front side of the second end cap 40, the mounting of the roll body 10 to the roll body holder 1 is completed as shown in FIG.

  After mounting the roll body 10 to the roll body holder 1 of the film supply unit 120 as described above, the film packaging machine 100 is operated to perform the packaging process of the article B with the film 14. When the remaining amount of the film 14 wound around the roll body 10 is completed or is little remaining, the roll body 10 is attached to the roll body holder 1 of the film supply unit 120 in the reverse order, The roll body 10 may be removed from the roll body holder 1 of the roll body supply unit 120. After removing the roll body 10 from the roll body holder 1, the new roll body 10 may be attached to the roll body holder 1 according to the procedure described above.

As mentioned above, although the roll body holder which concerns on this invention, and the film packaging machine provided with the same have been demonstrated based on embodiment, this invention is not limited to the above embodiment.
For example, in the present embodiment, the slope portion 35 of the first end cap 30 has been described in a form in which all of the frustoconical side surfaces are covered. However, as shown in FIG. 9, the rod 20 is inserted. The slope portion 35 may be formed by appropriately (single or plural) ribs R connecting the small diameter portion 32 to the large diameter portion 34 to the outer peripheral surface of the sleeve 39 in the radial direction of the rod 20. In short, there is a portion corresponding to a slope portion that can be slid with a small force while the roll body 10 is placed between the rod 20 (the small diameter portion 32 of the first end cap 30) and the large diameter portion 34. It only has to be. At this time, when the roll body 10 is mounted on the rod 20, it is necessary to attach the first end cap 30 to the rod 20 so that the arrangement position of the rib R is the apex position of the rod 20.

  In the present embodiment, the shape of the first end cap 30 and the second end cap 40 and the surface treatment for reducing friction are the same, but the present invention is not limited to this. The surface treatment for disposing the flange portion on the second end cap 40 and reducing the friction is optional. Furthermore, the second end cap 40 is a member that is attached to the front side portion (insertion rear end portion) of the roll body 10 when the roll body holder 1 is attached. For this reason, since the front side portion of the roll body 10 can be sufficiently lifted compared to lifting the insertion-side distal end portion of the roll body 10, the rod 20 is similar to the second end cap in the prior art. It may be a short shape (second end cap 40 shown in FIG. 10) having a taper portion that lifts and attaches the front side portion of the roll body 10 from the top.

  Further, in the present embodiment, the configuration in which the first end cap 30 is detachably formed on the rod 20 is described. However, if the holding position of the roll body 10 with respect to the rod 20 is constant, the rod 20 Of course, a configuration in which the first end cap 30 and the first end cap 30 are integrally formed may be employed. According to this shape, the diameter dimension φr of the rod 20 and the diameter dimension φ1 of the small diameter portion 32 of the first end cap 30 can be completely matched, and the work of mounting the roll body 10 to the roll body holder 1 is possible. Can be performed more easily.

  Further, in the present embodiment, the first end cap 30 and the second end cap 40 are each attached to the rod 20 via the fixture 50, but the first end cap is not provided via the fixture 50. Of course, a configuration in which the 30 and the second end cap 40 are directly attached to the rod 20 may be adopted.

DESCRIPTION OF SYMBOLS 1 Film holder 10 Roll body 12 Cylindrical body 14 Film 20 Rod 30 1st end cap 32 Small diameter part 34 Large diameter part 35 Slope part 36 Insertion hole 38 Flange part 39 Sleeve 40 2nd end cap 50 Fixing tool 100 Film packaging Machine 105 Main body frame 110 Article supply unit 120 Film supply unit 130 Packaging unit 140 Discharge unit

Claims (5)

A roll body holder to which a roll body around which a long film is wound is mounted,
A rod that passes through the core of the roll body, and a first and a second that are detachably fixed on the rod at intervals and that fit into both ends of the core to hold the roll body Having an end cap,
The first end cap is
A flange portion with which the end portion of the core portion abuts, and
In a state where the core portion is in contact with the flange portion, a fitting portion that fits into the core portion;
A slope portion that gradually expands toward the insertion portion and reaches the insertion portion, and
The slope portion is
When the roll body is mounted, the roll body is placed on the slope portion by the inner peripheral surface on one end side of the core portion and pushed toward the flange portion, so that one end side of the core portion is the slope portion. The roll body holding is characterized in that it is guided in contact with the inclined surface of the tape and is formed in a guide portion for inserting the insertion portion into one end side of the core portion at a position in contact with the flange portion. Ingredients.   The roll body holder according to claim 1, wherein the first end cap is formed so that an inclination angle of the slope portion with respect to an axis of the rod is 12 ° or less.   The roll body holder according to claim 1 or 2, wherein the second end cap is formed in the same shape as the first end cap.   The roll body holder according to any one of claims 1 to 3, wherein at least a slope portion of the first end cap is covered with a low friction material. An article supply unit for supplying articles;
A film supply unit to which a film for packaging an article formed on a roll body can be attached;
A packaging unit for packaging an article with the film unwound from the film supply unit;
A carry-out portion for carrying out a package in which the article is film-wrapped by the packaging portion;
The film packaging machine according to any one of claims 1 to 4, wherein the roll body holder is disposed in the film supply unit.

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