JPH11349196A - Tensile force giving device of lengthy article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly give desired back tension as well as to make it suitable for simplification and miniaturization of constitution. SOLUTION: A tensile force giving device 10 is furnished with first and second back tension rollers 72, 74. The first back tension roller 72 is furnished with a first roller member 86 free to rotate on a first support shaft 80 and a first brake member 88 to be fixed on this first support shaft 80 free to adjust a position, a plural number of magnets 94 are provided on a first side surface 92 of the first roller member 86, and a plural number of second magnets are provided on a second side surface of the first brake member 88.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for applying tension to a long object which contacts a long object to be conveyed and applies back tension to the long object.

[0002]

2. Description of the Related Art Generally, when a long object is processed or when the long object is wound into a roll, a predetermined back tension is applied to the long object in contact with the long object. Tensioning devices are used. For example, in the case of a photographic roll film which is a long object, when the light-shielding paper strip and the photo film strip are wound on the spool, if the back tension is not applied to the light-shielding paper strip, the light-shielding paper strip meanders during the winding. Thus, for example, there is a risk of running on the flange of the spool. As a result, there has been a problem that the winding diameter of the photographic roll film is increased to cause a defective product or a light blocking defect is caused.

[0003] In order to apply back tension to the light-shielding paper strip when the light-shielding paper strip and the photographic film strip are wound on the spool, for example, a tension applying device disclosed in Japanese Patent Application Laid-Open No. 2-62378 is used. Is done.

In this prior art, as shown in FIG. 7, a rotating plate 2 made of a ferromagnetic material is fixed to an intermediate portion of a rotating shaft 1, and this rotating plate 2 is a pair of donut-shaped members. It is arranged between the permanent magnets 3,4. Each of the permanent magnets 3 and 4 has an S pole and an N pole alternately arranged in the circumferential direction, and the rotating plate 2 is interposed between the permanent magnets 3 and 4 via a cylindrical spacer 5. Is formed in a space 6 in which can rotate. The roller 7 is provided on the rotating shaft 1, and the rotating shaft 1 is similarly provided on another roller 8 disposed opposite to the roller 7.

When the light-shielding paper strip 9 is conveyed while the light-shielding paper strip 9 is held between the rollers 7 and 8, the rotating shaft 1 provided on the rollers 7 and 8 rotates. A relatively strong magnetic flux is formed in the space 6 between the permanent magnets 3 and 4, and when the rotating shaft 1 rotates, a force that tries to hinder the rotation of the rotating shaft 1, that is, torque is generated, A predetermined tension is applied to the light-shielding paper strip 9.

[0006]

However, in the above-mentioned prior art, since the rotating plate 2 is disposed between the pair of permanent magnets 3, 4, it is difficult to obtain a sufficient torque.
The outer diameter of the permanent magnets 3 and 4 becomes considerably large. As a result, it has been pointed out that the size of the entire tension applying device cannot be easily reduced.

SUMMARY OF THE INVENTION The present invention solves this kind of problem and provides a tension applying device for a long object which can reliably apply a sufficient back tension and can easily carry out simplification and downsizing of the entire device. The purpose is to provide.

[0008]

In the tension applying apparatus for a long object according to the present invention, a back tension roller is rotatably mounted on a support shaft and is in contact with the long object, and is fixed to the support shaft. And a brake member arranged in parallel with the roller member in the axial direction. Then, the first and second opposed members of the roller member and the brake member, respectively.
On the side surface, a plurality of first and second magnets each of which applies a rotational load to the roller member via mutual attraction and / or repulsion are provided.

As described above, since the plurality of first magnets are provided on the first side surface of the roller member, the size of the back tension roller itself can be easily reduced, and each of the plurality of first and second magnets is provided. Under the action, a desired back tension can be reliably applied to a long object over a long period of time.

Here, by adjusting the position of the brake member in the axial direction with respect to the support shaft, the distance between the first magnet and the second magnet is changed. Therefore, the back tension applied to the long object via the roller member can be easily changed, and the desired back tension can be reliably applied to the long object.

A first back tension roller is disposed on one surface of the long object, and a second back tension roller is disposed on the other surface of the long object. The long object is held by the back tension roller. At this time, the second back tension roller has both ends of the support shaft held by an arm member, and the arm member is configured to be swingable corresponding to a central portion of the second back tension roller. For this reason,
The entire contact surface of the long object can be uniformly held via the first and second back tension rollers, and uniform back tension can be effectively applied to the long object.

Further, the second back tension roller is
It is configured to be able to advance and retreat to the other surface side of the long object via the swing mechanism. Therefore, the second back tension roller is in contact with the long object only when the back tension is required, so that the efficiency of the entire operation can be easily achieved. Further, for example, if the second back tension roller is separated from the long object immediately before the stop of the winding of the long object, a great countermeasure occurs when the end portion of the long object separates from the first and second back tension rollers. No force is applied, and it is possible to effectively prevent unnecessary rotation of the entangled product.

Further, the long object has a photographic film strip and a light-shielding paper strip, and a back tension is applied when the photographic film strip and the light-shielding paper strip are wound around a spool having a cylindrical shaft portion. Has been granted. As a result, it is possible to minimize the occurrence of breakage of the light-shielding paper strip and thickening of the product, and to efficiently obtain a high-quality photographic roll film.

[0014]

FIG. 1 is a schematic configuration diagram of a roll film manufacturing apparatus 12 incorporating a long object tension applying apparatus 10 according to an embodiment of the present invention, and FIG. FIG. 2 is a perspective explanatory view of a photographic roll film 14 manufactured by the method of the present invention.

As shown in FIG. 2, the roll film 14 has a spool 16 made of a resin, a photographic film strip 18 obtained by cutting a long photographic film to a specified length, and an entire back side of the photographic film strip 18. And a light-shielding paper strip 20 arranged as a backing paper. The leading end 18a of the photographic film strip 18 is fixed to the back surface of the light-shielding paper strip 20 via an adhesive tape 22, and an opening seal 24 for preventing the roll film 14 from loosening around the outer periphery of the light-shielding paper strip 20. Fixed. A photographic film strip 18 and a light-shielding paper strip 20 wound around another spool 16 after photographing
A sealing seal 26 for preventing the winding of the light-shielding paper strip 20 is provided on the front side of the light-shielding paper strip 20.

The spool 16 is provided with a disk-shaped flange 30 on both sides of a cylindrical shaft portion 28.
A slit 32 is formed along the axial direction, and a substantially T-shaped engaging claw 33 is integrally formed on one inner wall surface of the slit 32. On the other inner wall surface of the slit 32, a pair of holding ribs 34 are formed integrally with the locking claw 33 as a center.

The leading end portion 20a and the trailing end portion 20b of the light-shielding paper strip 20 are cut obliquely and are set to have a narrow width so as to be easily inserted into the slit 32 of the spool 16. A locking hole 36 for inserting a locking claw 33 when the light-shielding paper strip 20 is inserted into the slit 32 of the spool 16 in the camera is formed in the front end portion 20a of the light-shielding paper strip 20. On the adhesive tape 22, a bar code 38 representing film information such as a film type, a film size, and a film type is printed.

As shown in FIG. 1, the roll film manufacturing apparatus 12 includes a film supply mechanism 40 for supplying the photographic film strip 18, a light shielding paper supply mechanism 42 for supplying the light shielding paper strip 20, and a light shielding paper And a winding mechanism 44 that winds the strip 20 and the photographic film strip 18.

The film supply mechanism 40 includes a film supply section 46. The film supply section 46 pulls out a long photographic film 48 wound in a roll shape by a predetermined length.
Various film information such as size, sensitivity, film type, lot number and the like are side-printed on the long photo film 48 and sent out to the film transport path 50. A film cutter 52 for cutting the long photographic film 48 into fixed lengths to form the photographic film strip 18 is disposed between the film supply section 46 and the film transport path 50.

On the downstream side of the film transport path 50, the leading end 18a of the photographic film strip 18 (the rear end in the transport direction).
A tape sticking section 54 for sticking the adhesive tape 22 to the tape is provided. The tape affixing section 54 pulls out the release paper wound in a roll shape integrally with the adhesive tape 22 from the original winding roll, separates the adhesive tape 22 from the release paper, and removes the leading end 18 of the photographic film strip 18.
Paste on a. On the downstream side of the tape attaching section 54,
A transport roller pair 56 is provided.

The light-shielding paper supply mechanism 42 includes a light-shielding paper supply unit 58.
The light-shielding paper supply unit 58 pulls out the long light-shielding paper 60 wound into a roll to a predetermined length and trims the light-shielding paper strip 20 into portions corresponding to the leading end portion 20a and the trailing end portion 20b. And a hole in the locking hole 36 is formed. The long light-shielding paper 60 has a light-shielding paper strip 20 continuously printed thereon, and a rear end portion 20b which is locked to the spool 16 during manufacturing.
Is transported forward.

At the downstream side of the light-shielding paper transport path 62 into which the long light-shielding paper 60 is fed from the light-shielding paper supply unit 58, a sticker for sticking the seal 26 at a predetermined position on the surface of the long light-shielding paper 60 is attached. The attachment part 64 is arranged. The seal sticking section 64 draws the seal 26 from the original roll wound into a roll to a fixed size, cuts the seal, and sticks the seal 26 at a predetermined position on the surface of the light-shielding paper strip 20. On the downstream side of the seal sticking section 64,
A tension applying device 10 according to the present embodiment for applying a back tension to the light shielding paper strip 20, a transport roller pair 66 for transporting the long light shielding paper 60 to the winding mechanism 44 side,
A light-shielding paper cutter 68 for cutting the long light-shielding paper 60 at a predetermined position to form the light-shielding paper strip 20 is provided.

The film transport path 50 and the light-shielding paper transport path 62 merge to form a merge transport path 70.

As shown in FIGS. 3 to 5, the tension applying device 10 includes a first back tension roller 72 disposed on one surface (front surface) of the light-shielding paper strip 20 and the other of the light-shielding paper strip 20. And a drive mechanism 76 for moving the second back tension roller 74 forward and backward with respect to the other surface of the light-shielding paper strip 20.

A first support shaft 80 is fixed to a base 77 constituting the tension applying device 10 via a holder 78. The first support shaft 80 has a small diameter via a step. Thereafter, a screw portion 82 is provided at the tip. The first back tension roller 72 includes a first roller member 8 rotatably mounted on a first support shaft 80 via a bearing 84.
6 and a first brake member 88 fixed to the screw portion 82 of the first support shaft 80 and arranged in parallel with the first roller member 86 in the axial direction (the direction of arrow A).

The first roller member 86 has a peripheral groove 90 formed in the center of the outer peripheral portion thereof and a first brake member 88.
A plurality of, for example, eight first magnets 94 are arranged and embedded along the circumference on the first side surface 92 facing the side (see FIG. 6). The first brake member 88 has a substantially cylindrical shape, and has a screw hole 96 at the center thereof into which the screw portion 82 is screwed.
There is provided a set screw (adjustment means) 98 for fixing the first brake member 88 at a predetermined position by contacting the same. First
Second side surface 9 of brake member 88 on first roller member 86 side
9, a plurality of, for example, two second magnets 100 are embedded facing the first magnet 94. The first magnet 94 and the second magnet 100 have opposite polarities or opposite polarities, respectively.

A swing arm 102 constituting a driving mechanism 76 is mounted on the base 77 so as to be swingable via a fulcrum 104.
A rod 108 extending from 06 is locked. A spring 110 is disposed on the other end of the swing arm 102, and presses the swing arm 102 in a direction away from the first back tension roller 72.

A shaft 116 of an arm member 114 is rotatably supported at the tip of the swing arm 102 via a bear link 112. The second back tension roller 74 is mounted on the arm member 114, and the shaft portion 116
Is set at a position corresponding to the central portion of the second back tension roller 74. Both ends of a second support shaft 118 constituting the second back tension roller 74 are supported by an arm member 114.
The roller member 120 is rotatably supported. The second brake member 122 is fixed to the second support shaft 118 so as to be adjustable in position. A balancer 124 is fixed to the second support shaft 118 on the side opposite to the second brake member 122.

The second roller member 120 and the second brake member 122 have the same configuration as the first roller member 86 and the first brake member 88, and the same components are denoted by the same reference numerals. Therefore, detailed description thereof is omitted.

As shown in FIG. 1, the winding mechanism 44 includes a shaft 1
A spool turret 132 rotatably attached to the spool 30; a spool supply unit 1 arranged on the outer periphery of the spool turret 132 to supply the spool 16;
34, a spool positioning machine 136 for positioning the direction of the slit 32 of the spool 16, and a winding portion 138 provided in a dark room and for winding the photographic film strip 18 and the light-shielding paper strip 20 around the spool 16.
A light-shielding paper folding machine 140 for folding the leading end portion 20a of the light-shielding paper strip 20 wound on the spool 16 inward, a seal winding machine 142 for winding the opening seal 24 around the outer periphery of the light-shielding paper strip 20, and a roll film. An inspection machine 144 that inspects the winding diameter of the roll 14 and an accumulation transport path 146 that transports the roll film 14 determined to be non-defective by the inspection to a packaging device or the like.

The spool turret 132 is intermittently rotated by 45 degrees in a direction indicated by an arrow by a motor (not shown). The spool turret 132 is provided with a spool holder 148 for holding the spool 16. Although not shown, the spool holder 148 is provided with a motor for rotating the spool 16 in the winding direction. The respective stop positions of the spool turret 132 are set at first to seventh stations ST1, ST2, ST3, ST4, and ST4 for performing various operations on the spool 16.
ST5, ST6, and ST7 are provided, and a spool supply unit 134, a spool positioning device 136, a winding unit 138, a light-shielding paper folding machine 140, a seal winding machine 142, an inspection machine 144, and an accumulation conveyance path 146 are arranged.

The operation of the tension applying device 10 configured as described above will be described below in relation to a roll film manufacturing device 12 incorporating the tension applying device 10.

First, the long photographic film 48 set in the film supply section 46 is pulled out by a predetermined length, and is conveyed to the film cutter 52. During this conveyance, the film information is side-printed by the side printer outside the photographing range of the long photo film 48. The long photographic film 48 conveyed to the film cutter 52 is cut into a predetermined length to obtain a photographic film strip 18, and the photographic film strip 18 is sent to the tape attaching section 54 in the film conveying path 50. . In the tape affixing section 54, the adhesive tape 22 is affixed to the leading end 18a of the photographic film strip 18, and the photographic film strip 18 to which the adhesive tape 22 is affixed is temporarily stopped by being sandwiched by the transport roller pair 56. Is done.

On the other hand, the long light-shielding paper 60 set in the light-shielding paper supply section 58 is pulled out by a certain length, and the portions that become the leading end 20a and the rear end 20b of the light-shielding paper strip 20 are trimmed. A locking hole 36 is drilled. Long light-shielding paper 60 trimmed and perforated
Is sent to the sticker 64 in the light-shielding paper transport path 62. In this sticker sticking portion 64, a seal sticker 26 is stuck at a predetermined position on the surface of the light-shielding paper strip 20, and the long light-shielding paper 60 to which the seal sticker 26 is stuck is wound by a transport roller pair 66. Rotation mechanism 4
It is transported to the 4 side.

At the same time as the operations of the film supply mechanism 40 and the light-shielding paper supply mechanism 42, the operation of each part of the winding mechanism 44 is also started. That is, in the first station ST1, the spool 16 manufactured and transported on another line is set from the spool supply unit 134 to the spool holder 148.

After the spool 16 is set on the spool holder 148, the spool turret 132 is
During the middle and intermittent rotations in the direction of the arrow, the second station ST2 stops. This second station ST2
Then, the spool 16 is controlled via the spool positioner 136.
Are positioned in a predetermined direction. In addition,
While the above operation is performed, the second back tension roller 74 constituting the tension applying device 10 is driven by the driving mechanism 76.
Has been retracted upwards via.

The spool 16 is connected to the third station ST3
Is transported by the transport roller pair 66, the leading end (the rear end portion 20b) of the long light-shielding paper 60 is
Is inserted into the slit 32. Next, the tension applying device 1
0 is driven and the cylinder 106 is driven.
The rod 108 protrudes downward (in the direction of arrow B in FIG. 5) under the action of.

Therefore, the swing arm 102 swings downward on the distal end side against the elastic force of the spring 110, and the second back tension roller 74 mounted on the arm member 114 moves to the holding position. . Therefore, the long light-shielding paper 60 is nipped by the first and second back tension rollers 72 and 74.

Therefore, as shown in FIG.
0 is cut through the light-shielding paper cutter 68, and the light-shielding paper strip 20 is obtained. In this state, the spool holder 1
48 rotates the spool 16 by several turns in the film winding direction, and winds the rear end portion 20b of the light-shielding paper strip 20 around the shaft portion 28 of the spool 16.

Next, the photographic film strip 18 is transported from the film transport path 50 via the transport roller pair 56 and is superimposed on the back surface of the light-shielding paper strip 20. When the spool 16 is further rotated in the winding direction, the light-shielding paper strip 20 and the photographic film strip 18 are wound around the spool 16.

In this case, in the present embodiment, the back tension rollers 72 and 74 sandwiching both sides of the light-shielding paper strip 20 are rotated by the first and second roller members which rotate when the light-shielding paper strip 20 is transported. 86,
120 is provided. The first and second roller members 8
A plurality of first magnets 94 are embedded in each first side surface 92 of each of the first and second brake members 88 and 122 facing the first side surface 92.
A plurality of second magnets 100 are embedded in the side surface 99 (see FIG. 6).

Accordingly, a force for preventing the rotation of the first and second roller members 86 and 120 through the attraction force between the first magnet 94 and the second magnet 100 or a repulsive force, that is, a torque is generated. Then, a predetermined back tension is applied to the light-shielding paper strip 20. Therefore, the first and second back tension rollers 72 and 74 can be effectively reduced in size, and the desired back tension can be reliably applied.

Moreover, the second back tension roller 74
Is a swingable arm member 1 with its central portion as a fulcrum.
14. Accordingly, when the swing arm 102 constituting the driving mechanism 76 swings downward to clamp the light-shielding paper strip 20 between the second back tension roller 74 and the first back tension roller 72, the second back tension roller 74 forming the second roller member 120
, The light-shielding paper strip 20 can be uniformly sandwiched. Thereby, there is an advantage that a uniform back tension can be reliably applied to the light-shielding paper strip 20.

Further, the second back tension roller 74 can move forward and backward with respect to the light-shielding paper strip 20 via the driving mechanism 76. Therefore, the light-shielding paper strip 20
The second back tension roller 74 can be disposed at the position where the light-shielding paper strip 20 is sandwiched only when the back tension is applied to the, so that the efficiency of the entire manufacturing process can be improved. Further, when the second back tension roller 74 is swung upward immediately before the roll film 14 stops being wound, when the leading end portion 20a of the light-shielding paper strip 20 separates from the first and second back tension rollers 72 and 74, No large reaction force acts. For this reason,
It is possible to reliably prevent the roll film 14 from rotating more than necessary.

As a result, an appropriate tension is applied to the light-shielding paper strip 20, and
Does not meander. In addition, there is an effect that it is possible to reliably prevent the roll film 14 from being rolled and thickened.

In this embodiment, the position of the first brake member 88 in the axial direction can be adjusted via the set screw 98. Accordingly, the distance between the first magnet 94 and the second magnet 100 becomes variable, and the rotational load of the first roller member 86 is effectively adjusted. The first and second magnets 94, 100
Can be increased or decreased according to the required back tension, and the first and second magnets 94 and 100 themselves may alternatively have N poles and S poles.

At the third station ST3, the spool 16 around which the photographic film strip 18 and the light-shielding paper strip 20 are wound is placed in the spool turret 1
By the rotation of 32, it is transported to the fourth station ST4. In the fourth station ST4, the shading paper folding machine 1
The leading end 20a of the light-shielding paper strip 20 is folded inward by 40.

In the fifth station ST5, the opening seal 24 is wound around the outer periphery of the light-shielding paper strip 20 by the seal winding machine 142. Further, in the sixth station ST6, the winding diameter of the roll film 14 is inspected by the inspection machine 144, and the roll film 14 determined to be defective in this inspection is taken out from the spool holder 148 and discharged out of the apparatus. On the other hand, the roll film 14 determined to be non-defective is taken out of the spool holder 148 at the seventh station ST7, and
And transported toward a packaging device or the like.

[0049]

In the tension applying device for a long object according to the present invention, the first and second side surfaces of the roller member rotatably mounted on the support shaft and the brake member fixed to the support shaft are respectively opposed to each other. In addition, a plurality of first and second magnets are provided to apply a rotational load to the roller member. Therefore, the size of the back tension roller itself can be effectively reduced, and a desired back tension can be reliably applied.

[Brief description of the drawings]

FIG. 1 is a schematic configuration explanatory view of a roll film manufacturing apparatus incorporating a tension applying device according to an embodiment of the present invention.

FIG. 2 is an explanatory perspective view of a roll film manufactured by the roll film manufacturing apparatus.

FIG. 3 is an explanatory perspective view of the tension applying device.

FIG. 4 is a partial cross-sectional side view of the tension applying device.

FIG. 5 is a side view of a main part of the tension applying device.

FIG. 6 is an enlarged perspective explanatory view of a main part of the tension applying device.

FIG. 7 is a schematic configuration explanatory view of a tension applying device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Tension giving apparatus 12 ... Roll film manufacturing apparatus 14 ... Roll film 16 ... Spool 18 ... Photo film strip 20 ... Light shielding paper strip 40 ... Supply film supply mechanism 42 ... Light shielding paper supply mechanism 44 ... Winding mechanism 72, 74 ... Back Tension roller 76 Drive mechanism 80, 118 Support shaft 82 Screw part 86, 120 Roller member 88, 122 Brake member 92, 99 Side 94, 100 Magnet 98 Set screw 102 Swing arm 114 Arm Member 116: Shaft

Claims (5)

[Claims] A back tension roller that contacts a long object to be conveyed and applies a back tension to the long object, wherein the back tension roller is rotatably mounted on a support shaft and attached to the long object. A roller member in contact with the brake member, a brake member fixed to the support shaft and arranged in parallel with the roller member in the axial direction, and a plurality of brake members each on the first and second side surfaces of the roller member and the brake member, respectively. And a first magnet and a second magnet for applying a rotational load to the roller member through mutual attraction force and / or repulsion force. 2. The tension applying device according to claim 1, wherein the distance between the first magnet and the second magnet is adjusted.
A tension applying device for a long object, comprising adjusting means for adjusting a position of the brake member in an axial direction with respect to the support shaft. 3. The tension applying device according to claim 1, wherein the back tension roller includes a first back tension roller disposed on one surface of the long object, and another surface of the long object. The first back tension roller and a second back tension roller capable of sandwiching the long object, wherein both ends of a support shaft constituting the second back tension roller are held by an arm member. The tension applying device for a long object, wherein the arm member includes a shaft portion which is swingably supported corresponding to a central portion of the second back tension roller. 4. The tension applying device according to claim 3, further comprising a drive mechanism for moving the second back tension roller forward and backward with respect to the other surface of the elongated object. apparatus. 5. The tension applying device according to claim 1, wherein the long object has a photographic film strip and a light-shielding paper strip fixed to the photographic film strip. A tension applying device for a long object, wherein a back tension is applied to the long object when the long object is wound around a spool having a cylindrical shaft portion.