JPH08268602A - Scroll support means and device - Google Patents

Abstract

PURPOSE: To prevent a scroll from generation of a slip and a scratch at the time of rolling back, support the scroll capable of rolling back as far as near the distal end thereof and insert a supporting shaft into the cylindrical hole thereof easily from both ends. CONSTITUTION: Each expansible part 14 is provided at each of a pair of supporting shafts 12, 12. A pair of supporting shafts 12, 12 are inserted into a cylindrical hole of a coreless scroll 16 while the expansible parts 14, 14 are in a shrinking state. The expansible part 14, 14 are subjected to elastic deformation and expand so as to be brought into contact with the inner surface of the coreless scroll 16 when compressed air is supplied therein. The expansion diameter of the expansible part 14 can be adjusted freely by pressure control of the compressed air as it is formed of elastic deforming material. Consequently the expansible part 14 is expanded in a desirable state and brought into contact with the whole inner cylindrical surface of the coreless scroll 16, and thus the coreless scroll 16 is held firmly without being supported with a strong force and expansion of the supported coreless scroll 16 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for supporting a rolled material, and more particularly to a method and an apparatus for supporting a rolled material in which a belt-shaped photographic light-sensitive material is wound in a coreless state.

[0002]

2. Description of the Related Art When taking an inspection / test sample from a belt-shaped winding device for a photographic light-sensitive material, it is necessary to take it while maintaining the quality of the photographic light-sensitive material. As for the method of collecting this sample, as disclosed in JP-A-5-18782, the web end portion of the rolled product of the photographic light-sensitive material is fed downward and the web end portion is fed onto the surface roller by a shooter. The surface roller feeds the web end along a semi-circular guide that extends between the surface rollers, and winds the web end in a circle without a core. After winding the edge of the web into a circle, remove the semicircular guide and wind it several times with a pressing roller to form a sample roll.

According to this sample collecting method, it is possible to collect a sample without using a winding core (coreless state) while maintaining the quality of the photographic material. However, this sampling method has a problem that it is difficult to cope with the case where the width of the photographic light-sensitive material is wide, and that it is not suitable for speeding up. On the other hand, a method of winding a sample in a coreless shape using an air shaft is known.

[0004]

However, when the sample is wound up by the air shaft so as to form a coreless roll, the roll is supported by the air shaft, so that the contact area between the rubber of the air shaft and the tubular roll is large. Is small and slip is likely to occur. Also,
If the roll is held with a strong force to prevent slippage, there are problems that the roll spreads and the roll is damaged, and it is impossible to hold the roll near the end.

Further, since the tube is built inside the air shaft, the tube becomes an obstacle and the diameter cannot be sufficiently reduced when the diameter is reduced. Therefore, since the difference in diameter between the air shafts during expansion and contraction is small, there is a problem that it is not easy to insert and set the supporting device from both sides in the coreless cylindrical scroll in which the innermost circumference is less likely to be a perfect circle.

The present invention has been made in view of the above circumstances, and it is possible to prevent the occurrence of slips and scratches on the reel when the reel is unwound, and to hold the reel up to the vicinity of its end.
Another object of the present invention is to provide a method and apparatus for supporting a scroll that allows the support device to be easily inserted from both sides of the scroll when supporting the scroll.

[0007]

In order to achieve the above-mentioned object, the present invention is arranged so as to be coaxially opposed to each other on both sides of the scroll, and each of them is disposed from both sides of the scroll to the inner circumference of the scroll. A pair of support shafts movably supported in the axial direction between a fitted position and a position retracted from both sides of the scroll, and the pair of support shafts respectively provided on the pair of support shafts and supplied with a pressure fluid, And a pair of expansion / contraction portions that are elastically deformed so as to come into contact with the inner circumference of the scroll and expand in diameter, and decrease in diameter when the pressure fluid is removed so as to separate from the inner circumference of the scroll.

Further, in the present invention, in order to achieve the above object, a tapered nose is formed at a tip portion of the support shaft,
It is characterized in that the maximum diameter of the nose is formed larger than the diameter of the reduced diameter expansion / contraction portion.

[0009]

According to the present invention, the pair of support shafts are coaxially opposed to each other on both sides of the scroll. The pair of support shafts are movably supported in the axial direction between a position where they are fitted into the inner circumference of the roll from both sides of the roll and a position where they are retracted from both sides of the roll. An expansion / contraction part is provided on each of the pair of support shafts. Each expansion / contraction part elastically deforms and expands in diameter when pressure fluid is supplied, and abuts on the inner circumference of the roll. When the pressure fluid is removed from the expansion / contraction part, the expansion / contraction part is reduced in diameter and separated from the inner circumference of the scroll.

In this case, since the expansion / contraction part is formed of the elastically deformable member, the pressure of the pressure fluid is adjusted to
The diameter expansion amount of the expansion / contraction portion can be arbitrarily adjusted. In this way, by expanding the expansion / contraction part to a desired expanded state, the expansion / contraction part contacts the entire inner circumference of the roll. Therefore, it is possible to reliably hold the scroll without supporting it with a strong force. Further, since the expanded diameter portion is formed of the elastically deformable member, when the expanded and contracted portion is reduced in diameter, the diameter of the reduced diameter expanded portion can be made sufficiently smaller than the inner diameter of the scroll. Further, a tapered nose is provided at the tip of the support shaft so that the diameter of the reduced diameter expanded portion is smaller than the maximum diameter of the nose. Therefore, when the support shaft is fitted into the inner circumference from both sides of the scroll, the expanded diameter portion is prevented from coming into contact with the inner circumference of the scroll.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and apparatus for supporting a scroll according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a side view of a scroll supporting device 10 according to the present invention, and FIG. 2 shows a side view showing a state in which the scroll is supported by the scroll supporting device 10. As shown in FIG. 1, the scroll support device 10 includes support shafts 12 and 12 and expansion / contraction portions 14 and 14. The support shafts 12, 12 are arranged coaxially on opposite sides of the coreless scroll 16 so as to face each other. A nose 12A is formed in a conical shape at the tip of the support shaft 12. The support shaft 12 is rotatably supported by an arm 22 via a bearing 20, and the arm 22 is movably supported in the direction of arrow AB.

Therefore, the arms 22 and 22 are mutually indicated by an arrow A.
When moved in the direction, the support shafts 12, 12 move in the direction in which they are fitted into the opening from both sides of the coreless scroll 16.
When the arms 22, 22 move in the direction of arrow B, the support shafts 12, 12 move in a direction away from both sides of the coreless scroll 16. This support shaft 12 has a nose 1
The expansion / contraction part 14 is provided behind 2A. Expansion / contraction section 14
Is formed in a ring shape sealed by an elastically deformable rubber member, and the inside of the expansion / contraction part 14 is connected to a compressed air supply source (not shown) via a rotary joint 12B. When the compressed air is not supplied from the compressed air supply source into the expansion / contraction unit 14, the expansion / contraction unit 14 is maintained in a reduced diameter state.

In this case, since the expansion / contraction part 14 is formed of a rubber member, when the expansion / contraction part 14 is expanded by supplying compressed air to the expansion / contraction part 14 as will be described later, the expansion / contraction part 14 is expanded. Since it can be expanded, the outer diameter D ₀ (see FIG. 1) of the expanded / contracted portion 14 in the reduced diameter state can be made sufficiently smaller than the inner diameter D of the coreless scroll 16. The outer diameter D ₀ of the expanded / contracted portion 14 in the reduced diameter state is smaller than the maximum outer diameter of the nose 12A.

Therefore, when the support shafts 12, 12 are fitted into the opening of the coreless scroll 16 from both sides of the coreless scroll 16, the expansion / contraction portion 14 is provided on the inner circumference 16A forming the opening of the coreless scroll 16. Contact is prevented. Thereby, the durability of the expansion / contraction part 14 is improved. In addition, by driving the compressed air supply source, compressed air is supplied into the expansion / contraction unit 14, and the expansion / contraction unit 14 expands and expands in diameter. Then, the expanded / contracted part 14 having the increased diameter is brought into contact with the inner periphery 16A forming the opening of the coreless scroll 16 (see FIGS. 2 and 3),
The coreless scroll 16 is supported by the expansion / contraction parts 14, 14.
In this case, the expansion / contraction part 14 is the inner circumference 16 of the coreless scroll 16.
The coreless scroll 16 is brought into contact with the entire circumference of A (see FIG. 3).
Hold securely.

Further, since the expansion / contraction part 14 is formed of a rubber member which is elastically deformable, the expansion amount of the expansion / contraction part can be arbitrarily adjusted by adjusting the pressure of the compressed air. D ₁ can be adjusted to the desired size. The compressed air supplied into the expansion / contraction unit 14 is exhausted from the inside of the expansion / contraction unit 14 by operating an exhaust valve (not shown). When the compressed air is discharged from the expansion / contraction part 14, the expansion / contraction part 14 is reduced in diameter smaller than the diameter of the opening of the coreless scroll 16 (see FIG. 1).

The operation of the scroll support device according to the present invention constructed as described above will be described. First, the support shafts 12 and 12 are fitted into the openings of the coreless scroll 16 from the position shown in FIG. In this case, since the tapered nose 12A is formed at the tip of the support shaft 12, the support shaft 12 can be easily fitted into the opening from both sides of the coreless scroll 16. .

Next, compressed air is supplied to the expansion / contraction parts 14, 14 provided on the support shafts 12, 12 to expand and expand the expansion / contraction parts 14, 14. As a result, the expansion / contraction portions 14, 14 contact the inner circumference 16 </ b> A forming the opening of the coreless scroll 16 to support the coreless scroll 16. Then, FIG.
After the tip of the photographic photosensitive material 16B of the coreless roll 16 shown in (1) is connected to a winding roll (not shown), the photographic photosensitive material 16B is unwound from the coreless roll 16 when the winding device of the photographic photosensitive material 16B is operated. At this time, the photographic photosensitive material 16B is rewound while applying tension to the coreless scroll 16 with the brake 26 connected to the support shaft 12 via the endless belt 24.

In the above embodiment, the case of supporting the wound coreless winding 16 without using the core has been described, but the present invention is not limited to this, and the core opening of the coreless winding wound on the core is formed. Expanding and contracting parts 14, 14 on the inner circumference
It is also possible to support the coreless scroll with a core by abutting.

[0019]

As described above, according to the method and apparatus for supporting a scroll of the present invention, the pair of support shafts are respectively provided with expansion / contraction parts, and the expansion / contraction parts elastically deform when pressure fluid is supplied. The diameter of the roll is increased and abuts on the inner circumference of the roll. When the pressure fluid is removed from the expansion / contraction part, the expansion / contraction part is reduced in diameter and separated from the inner circumference of the scroll. In this case, since the expansion / contraction part is formed of the elastically deformable member, the diameter expansion amount of the expansion / contraction part can be arbitrarily adjusted by adjusting the pressure of the pressure fluid. In this way, by expanding the expansion / contraction part to a desired expanded state, the expansion / contraction part contacts the entire inner circumference of the roll. Therefore, it is possible to reliably hold the scroll without supporting it with a strong force.

Thus, when the photographic light-sensitive material is rewound from the roll, slipping between the roll and the expansion / contraction portion can be prevented. Further, since the roll can be held without being unrolled, it is possible to prevent the photographic photosensitive material from being scratched due to the roll being unrolled, and it is possible to hold the roll up to near the end thereof. Further, since the expanded diameter portion is formed of the elastically deformable member, when the expanded and contracted portion is reduced in diameter, the diameter of the reduced diameter expanded portion can be made sufficiently smaller than the inner diameter of the scroll. Further, a tapered nose is provided at the tip of the support shaft so that the diameter of the reduced diameter expanded portion is smaller than the maximum diameter of the nose. Therefore, when the support shaft is fitted into the opening from both sides of the scroll, the expanded diameter portion is prevented from coming into contact with the inner circumference of the scroll.

Thus, the support shaft can be easily fitted into the inner circumference of the scroll. Further, since the support shaft can be fitted into the opening from both sides of the roll without contacting the inner diameter of the roll with the diameter-enlarged part, the durability of the diameter-enlarged part is improved.

[Brief description of drawings]

FIG. 1 is a side view of a scroll support device according to the present invention.

FIG. 2 is a side view showing a state in which a scroll is supported by the scroll support device according to the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a side view showing a state in which a scroll supported by the scroll support device according to the present invention is unwound.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Roll support device 12 ... Support shaft 14 ... Expansion / contraction part 16 ... Roll

Claims (3)

[Claims] 1. A pair of support shafts are fitted into the inner circumference of the scroll from both sides of the scroll, and a pressure fluid is supplied to each of the expansion and contraction portions provided on the pair of support shafts, thereby expanding and contracting the expansion and contraction portions. Supporting a scroll characterized by elastically deforming and expanding the diameter, abutting the expanded and contracted portion on the inner circumference of the scroll, and supporting both ends of the scroll by the pair of support shafts. Method. 2. A roll is disposed on both sides of the roll so as to be coaxially opposed to each other, and between each position where the roll is fitted into the inner circumference of the roll from both sides of the roll and a position retracted from both sides of the roll. And a pair of support shafts that are movably supported in the axial direction, and that are elastically deformed so as to come into contact with the inner circumference of the scroll when the pressure fluid is supplied to expand the diameter. And a pair of expanding and contracting portions that are reduced in diameter when the pressure fluid is removed and are separated from the inner circumference of the scroll. 3. A tapered nose is formed at a tip portion of the support shaft, and a maximum diameter of the nose is formed to be larger than a diameter of the reduced diameter expansion / contraction portion. Scroll support device.