JP3780451B2 - Film roll support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a film roll supporting device for supporting a film roll around which the film is wound in a packaging machine for packaging an article using a belt-like film.
[0002]
[Prior art]
2. Description of the Related Art A roll body obtained by winding a single sheet such as a belt-shaped paper, a film, a metal foil, or a composite sheet such as a laminate film around a cylindrical core is widely used in various industrial fields according to various applications. For example, in a bag-filling and packaging machine, a roll body (hereinafter referred to as “film roll”) in which a film mainly made of a synthetic resin is wound as a raw material for packaging is loaded into a predetermined position in the machine frame, and the film is continuously Various pillow wrapping bags are manufactured by forming the bag body by feeding it intermittently or intermittently and filling the bag body with articles.
[0003]
In the support device that supports the film roll in a state where the film can be fed, the film roll is excessively fed due to the rotational inertia of the film roll by applying appropriate braking to the roll support shaft on which the film roll is positioned and fixed. In order to prevent this, an appropriate tension is applied to the fed film. In order to ensure that the braking applied to the roll support shaft acts on the film roll, for example, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 62-167919, a wedge-shaped claw is provided on the roll support shaft, and the film roll is provided on the roll support shaft. After passing the cylindrical core (also called paper and paper tube), this claw is moved toward the film roll, and by pressing the end of the paper core at the hypotenuse of the claw, The film roll is firmly fixed to the roll support shaft.
[0004]
[Problems to be solved by the invention]
In the above-described support device, when the axial end of the core is pressed with the claw, the claw rubs against the core or the end of the core is crushed to generate dust. Further, when the film is unwound from the film roll, dust may be generated if the winding core slides on the nail. Such dust generation is particularly problematic when the packaging machine is installed in a clean room.
[0005]
OBJECT OF THE INVENTION
The present invention has been proposed in order to solve this problem in view of the above-mentioned problems inherent in the supporting device for film rolls according to the prior art, and prevents dust generation from the core of the film roll. An object of the present invention is to provide a film roll supporting device.
[0006]
[Means for Solving the Problems]
In order to overcome the above problems and achieve the intended purpose, the present invention provides:
A support device for supporting a film roll by a pair of roll supports rotatably arranged on a base ,
The film is attached to both ends of the core of the roll, with an adapter the roll support is to be inserted,
The adapter is
A contact portion which abuts an axial end of the beauty core Oyo inside insertable tubular insertion portion of the winding core,
A plurality of slits formed in the insertion portion and the contact portion so as to extend in the axial direction apart in the circumferential direction, and open on the contact portion side;
A flexible portion that is provided between the slits in the insertion portion and expands so that the outer peripheral surface thereof substantially coincides with the inner peripheral surface of the core when the roll support is inserted into the adapter;
Is disposed so as to protrude radially outward to the flexible portion, and a locking member which is engaged with the inner peripheral surface of the core by expanding the movable flexures,
At least one of the roll supports is provided with an engaging member that engages with the plurality of slits when inserted into an adapter mounted on the core .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, a film roll supporting device according to the present invention will be described with reference to the accompanying drawings by way of preferred examples.
[0008]
As shown in FIGS. 1 and 2, the support device according to the embodiment includes an adapter 14 that is removably attached to both ends of a paper cylindrical core 12 in the film roll 10, and is inserted into each adapter 14. It is basically composed of a roll support shaft (roll support) 16 that is removably inserted. The pair of roll support shafts 16 and 16 are, for example, a pair of base plates (none of which are not shown) provided at appropriate positions of a horizontal bag making and filling machine and capable of moving relatively close to and away from each other. The arms 18 and 18 are disposed so as to be able to rotate in opposition to the tip portions of the arms 18, respectively, and one arm 18 is provided with a brake 20 such as a hysteresis brake for applying braking to the roll support shaft 16. Since the configurations of the pair of adapters 14 and 14 and the pair of roll support shafts 16 and 16 are substantially the same, only the configuration of the adapter 14 and the roll support shaft 16 on one side will be illustrated and described.
[0009]
As shown in FIGS. 3 and 4, the adapter 14 includes a cylindrical insertion portion 22, and the outer diameter of the insertion portion 22 is set slightly smaller than the inner diameter of the core 12. It is comprised so that insertion from the axial direction one end part is possible. Further, a taper portion 22a having a diameter reduced toward the open end is formed at one axial end portion of the insertion portion 22, and a flange 24 as a contact portion extending radially outward is formed at the other end portion. The adapter 14 is formed and is positioned by inserting the insertion portion 22 into the core 12 from the tapered portion 22a side until the flange 24 contacts the end surface of the core 12.
[0010]
The insertion portion 22 and the flange 24 of the adapter 14 are provided with a plurality of slits 26 as engagement portions having a predetermined length that open to the flange 24 side and extend in the axial direction at equal intervals in the circumferential direction (Example) 4), and a flexible portion 28 is formed between the slits 26 and 26 adjacent to each other in the circumferential direction along the inner peripheral surface of the core 12. The adapter 14 is made of synthetic resin, and the flexible portion 28 can be bent inward and outward in the radial direction. In addition, a notch portion 30 formed in the insertion portion 22 and extending in a predetermined length in the circumferential direction is continuously provided at an end portion of the slit 26 that is separated from the flange 24. 28 is configured to ensure sufficient flexibility.
[0011]
As shown in FIG. 4, each flexible portion 28 is provided with a locking member 32 that protrudes radially outward from the outer peripheral surface thereof, and the insertion portion 22 is inserted into the core 12. Thus, when the roll support shaft 16 is inserted into the insertion portion 22, the locking member 32 is pressed and locked to the inner peripheral surface of the core 12, so that the adapter 14 and the core 12 Is firmly fixed. In the embodiment, the metal locking member 32 is screwed and fixed, but may be integrally formed of the same material (resin) as the flexible portion 28.
[0012]
As shown in FIGS. 5 and 6, the roll support shaft 16 rotatably disposed on the arm 18 is disposed at one axial end portion (arm side end portion) of the insertion portion 34 that can be inserted into and removed from the adapter 14. A flange 36 is formed as a contact portion extending radially outward, and the roll support shaft 16 inserts the insertion portion 34 into the adapter 14 until the flange 36 contacts the flange 24 of the adapter 14. Is positioned. In this insertion portion 34, the diameter of the base portion corresponding to the flange 24 of the adapter 14 (the end portion opposite to the insertion direction to the adapter 14) is slightly larger than the inner diameter of the adapter 14 not attached to the core 12. The diameter of the insertion tip portion, which is the end portion on the insertion direction side with respect to 14, is set to be slightly smaller than the inner diameter of the adapter 14 in the same state, and becomes a tapered shape that gradually becomes smaller in diameter from the base side toward the insertion tip portion side. ing. In this manner, the insertion portion 34 is formed in a tapered shape so as to be inserted into the adapter 14 and can be easily inserted into and removed from the adapter 14. The insertion portion 34 is formed with a plurality of (six in the embodiment) escape portions 34a having a small diameter dimension so that the adapter 14 can be inserted and removed more easily.
[0013]
On the side of the insertion portion 34 of the flange 36 in the roll support shaft 16, there are as many engaging members 38 as the number of slits 26 formed in the adapter 14 in the circumferential direction at intervals corresponding to the slits 26. They are spaced apart. The pins 38 can protrude and retract with respect to the flange 36, and are urged so as to always protrude toward the insertion portion 34 by a built-in spring (not shown), and each pin 38 engages with the corresponding slit 26. By doing so (see FIG. 1), the roll support shaft 16 and the adapter 14 are positioned so as not to idle. That is, in the embodiment, the slit (engaged portion) 26 and the pin (engagement member) 38 constitute an engagement means.
[0014]
[Effect of the embodiment]
Next, the operation of the film roll support device according to the embodiment will be described. When the film roll 10 is supported by the support device, first, the insertion portion 22 of the adapter 14 is inserted into the cylindrical core 12 and attached. The circumscribed circle of the locking member 32 provided on the flexible portion 28 of the insertion portion 22 is larger than the inner diameter of the core 12, but the flexible portion 28 is easily bent inward, so that the locking member is inserted when the insertion portion 22 is inserted. Since 32 does not rub against the inner peripheral surface of the core 12 with a strong force, dust generation is prevented. Further, the adapter 14 can be easily inserted into the core 12 by the bending of the tapered portion 22 a and the flexible portion 28 formed in the insertion portion 22. That is, when the film roll 10 is used in a clean room, the adapter 14 is attached to the roll 10 outside the clean room. However, since dust is not generated during the work, the attachment work can be performed in the clean room. is there.
[0015]
Next, the arms 18 and 18 are connected to each other in a state where the centers of the core 12 of the film roll 10 having the adapters 14 attached to both ends and the pair of separated roll support shafts 16 and 16 are aligned. The insertion portion 34 of each roll support shaft 16 is inserted to a position where both flanges 24 and 36 abut against the corresponding adapter 14 (see FIG. 1). Since the insertion portion 34 of the roll support shaft 16 has a tapered shape that decreases in diameter toward the insertion distal end as described above, the roll support shaft 16 is easily inserted into the adapter 14. When the roll support shaft 16 is inserted into the adapter 14, the flexible portions 28 are pressed toward the inner peripheral surface of the core 12 by the insertion portion 34 of the support shaft 16, and are spread outward. The locking member 32 is pressed and locked to the inner peripheral surface of the core 12. Thereby, the adapter 14 and the core 12 are reliably fixed without slipping. Since the locking member 32 is pressed against the inner peripheral surface of the core 12 from the radial direction, the both members 12 and 32 are not rubbed, and no dust is generated during this operation. In addition, when each flexible portion 28 is expanded outward by inserting the roll support shaft 16 into the adapter 14, the outer peripheral surface of the flexible portion 28 substantially coincides with the inner peripheral surface of the core 12. Become.
[0016]
Here, the pin 38 of the roll support shaft 16 and the slit 26 of the adapter 14 are displaced in the circumferential direction, and the pin 38 contacts the flange 24 of the adapter 14 when the roll support shaft 16 is inserted into the adapter 14. May be immersed in the flange 36. However, even in this state, since the braking is applied to the roll support shaft 16, the adapter 14 idles with respect to the roll support shaft 16 together with the film roll 10 when the film is fed out from the film roll 10. Thus, when the slit 26 formed in the flange 24 of the adapter 14 reaches the position of the pin 38, the pin 38 protrudes by the elasticity of the spring and engages with the slit 26. After the pin 38 and the slit 26 are thus engaged, slipping between the adapter 14 and the roll support shaft 16 is prevented, and the braking applied to the roll support shaft 16 is reliably applied to the film roll 10. I can tell you. When the film roll 10 is idle until the pin 38 and the slit 26 are engaged, the core 12 does not slide directly on the locking member 32, and the resin adapter 14 is attached to the roll support shaft 16. As it slides against it, it does not generate dust. Further, when inserting the roll support shaft 16 into the adapter 14, it is not necessary to position the pin 38 and the slit 26 so as to be aligned in advance, and the engagement work between the adapter 14 and the roll support shaft 16 is easy. is there.
[0017]
In the embodiment, only one roll support shaft 16 is configured to be braked, and the other roll support shaft 16 is only rotatably disposed on the arm 18. In FIG. 16, the pin 38 as an engaging member is omitted. That is, since braking is not applied when the other roll support shaft 16 is rotated, only the roll support shaft 16 is inserted into the adapter 14 so that the adapter 14 and the roll support shaft 16 are not idled. . Needless to say, the pin 38 may be provided on the other roll support shaft 16 to which no braking is applied.
[0018]
[Example of change]
The support device according to the present invention is not limited to the configuration of the above-described embodiment, and for example, the following modifications can be appropriately employed.
In addition to the configuration in which the roll support shaft is connected to the brake to apply braking, the support shaft may be connected to a drive source such as a motor to actively rotate .
For the pin as the engagement member, not intended to retracted into the flange of the roll support shaft, may be one which is fixed in a projecting state, but if so, in supporting the film roll, the slit of the adapter It is necessary to match the position of the pin.
Further, a pin may be provided in the insertion portion of the roll support shaft so that the axial direction of the pin coincides with the radial direction of the roll support shaft and engage with a slit formed in the insertion portion of the adapter. In this case, the pin may be configured to protrude from the outer peripheral surface of the roll support shaft, or may be configured to be fixed in a protruding state that does not enter.
Furthermore, with respect to the pin as the engagement member, as long as it can engage the slit, it may be a protrusion or protrusions or the like.
The number of the flexible portion of the adapter is to be set appropriately in consideration of the slit width, shape, thickness and the like of the insertion portion.
The support device of the embodiment is employed in a horizontal bag making and filling machine, but may be employed in other packaging machines.
[0019]
【The invention's effect】
As described above, according to the film roll support device of the invention of claim 1 , since the roll support is inserted into and supported by the adapter mounted on the core of the film roll, the roll support and There is no direct contact with the winding core, and the roll support does not rub the winding core and dust generation can be prevented. In addition, the adapter locking member is pressed against the inner peripheral surface of the core by the roll support to lock the adapter to the core, so that the locking member rubs against the core or the axial end surface of the core is Without crushing, dust generation can be prevented. Instead of fixing the winding core at the oblique side of the wedge-shaped claw as in the prior art, the locking member of the adapter is pressed and locked to the inner peripheral surface of the winding core, so the film roll is attached to the adapter. Ru is more firmly fixed for. Further, the engagement member provided on the roll support is engaged with the slit formed in the adapter so that the adapter does not idle with respect to the roll support. Even when braking is applied when the is fed out, the core does not slip with respect to the locking member, and dust generation can be suitably prevented. Even when the film roll is actively rotated by connecting a drive source to the roll support, the core does not slip with respect to the locking member due to the load of the film roll, and similarly prevents dust generation. obtain. Furthermore, the insertion portion of the adapter is easily formed by forming the insertion portion of the adapter into a cylindrical shape and providing a plurality of flexible portions. In addition, since the slit that forms the flexible portion in the insertion portion also serves as a locking portion that engages with the engaging member, there is no need to separately provide a recess or the like that engages with the engaging member. It is not necessary to set the positions of the engaging member and the recessed portion in consideration of the change in the expansion state of the flexible portion due to other errors or the like, and the engagement positioning is facilitated.
[0020]
According to the second aspect of the present invention, since the insertion portion of the roll support is formed to be tapered in the direction of insertion into the adapter, the support can be easily inserted into and removed from the adapter. According to the invention of claim 3, because provided so retractably engaging member relative to the roll support is not necessary to position to advance aligned and slits provided in the engaging member and the A da descriptor, both The engaging operation is simple.
[Brief description of the drawings]
FIG. 1 is a front view showing a support device according to an embodiment of the present invention in a partial cross section with a roll support shaft inserted into an adapter.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a front view showing an adapter according to an embodiment.
FIG. 4 is a side view showing the adapter according to the embodiment in a partial cross section.
FIG. 5 is a front view showing the roll support shaft according to the embodiment in a partial cross section.
FIG. 6 is a side view showing a roll support shaft according to an embodiment.
[Explanation of symbols]
10 Film Roll 12 Core 16 Roll Support Shaft (Roll Support)
22 Insertion part 24 Flange (contact part)
26 slit door
2 8 flexible portion 32 engaging member 34 inserted portion 38 the pin (engaging member)

Claims (3)

A support device for supporting a film roll (10) by a pair of roll supports (16, 16) rotatably disposed on a base ,
Wherein mounted on both ends of the core of the film roll (10) (12), comprising an adapter (14, 14), wherein the roll support member (16) is to be inserted,
The adapter (14)
Abutment portion abutting on the axial end portion of the inside insertable tubular insertion portion (22) and winding core (12) of said core (12) and (24),
A plurality of slits (26) formed on the insertion portion (22) and the contact portion (24) so as to be spaced apart in the circumferential direction and extending in the axial direction, and open on the contact portion (24) side ;
Provided between the slits (26, 26 ) in the insertion portion (22) , and when the roll support (16) is inserted into the adapter (14) , the outer peripheral surface thereof is the inner periphery of the core (12) . A flexible portion (28) that expands to substantially match the surface ;
Wherein it is disposed so as to protrude radially outward flexible portion (28), the locking member is locked to the inner peripheral surface of the winding core by spreading (12) of the movable flexure (28) ( 32) and
At least one of the roll supports (16) is provided with an engaging member (38) that engages with the plurality of slits (26) when inserted into the adapter (14) attached to the core (12). A support device for a film roll, which is provided . The insertion portion (34) of the roll support (16) with respect to the adapter (14) corresponds to the contact portion (24) with respect to the inner diameter of the adapter (14) not attached to the winding core (12). diameter slightly larger base, inserted so that the diameter of the tip portion is slightly smaller, the film roll of claim 1 Symbol placement gradually formed in a tapered shape whose diameter toward the insertion tip side from the base-side support device. Said engaging member (38), said roll support (16) of the film roll of claim 1 or 2 wherein is arranged to be retractable from the supporting device.

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