JPH0764199A - Continuous film feeding method and device - Google Patents

Abstract

(57) [Summary] [Purpose] Films to be fed to a photoprinting device are continuously supplied one by one without splicing each other. [Structure] A continuous film feeding device 1 is provided with a rotatable core 3 in a case 2, and the ends of films are overlapped and wound on the core 3, and a pressing roller 4 at the tip of a roller support arm 5 always rotates in a radial direction. Wind the film while pressing lightly on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous film feeding method and apparatus for continuously feeding a film to a photographic printing apparatus.

[0002]

2. Description of the Related Art When a photograph is printed with a photographic printing apparatus, one film or several films are previously spliced with an adhesive tape and wound into a roll, which is then fed from a film insertion port and fed by a transporting device. Is sent to the position of the printing exposure stage, where printing exposure is performed.

When the above-mentioned film is fed into the photographic printer through the film insertion port, the film is placed in a cartridge for each film before the film insertion port, or in the case of a roll-shaped film, it is placed in the case. It is stored.

[0004]

However, in the method of setting the film in the cartridge for each film or the method of setting the roll-shaped film in the case, there is a limit to the number of films that can be processed due to the limitation of the mounting position and the like. is there.

Further, it is troublesome to mount a cartridge for each film, splice the films with tape, remove the spliced films, and complicate the apparatus for continuously supplying the films.

Therefore, in consideration of the above-mentioned various points, a continuous film supply device is planned in which the films are stacked and stored without splicing the films. In this supply device, the films wound in layers are housed in a case, and a spring pressing member prevents the films from being wound.

However, since there is no mechanism for holding the leading end of the wound film inside the feeding device, the leading end of the film moves inside the feeding device while the feeding device is removed from the photographic printing machine, and is attached to the photographic printing machine. When the film is used, the film must be operated so that the film tip can be sent out from the delivery port of the case, which is time-consuming and may damage the film tip.

The present invention provides a continuous film supply method and device capable of continuously supplying a film by stacking a large number of films in a case while paying attention to the problems of the conventional film supply method described above. Is an issue.

Another object of the present invention is to keep in mind the problem of pressing the film leading edge of the above-mentioned continuous film feeding device, and to hold the leading edge of the film simply by closing the lid of the case, which is economical and safe. An object of the present invention is to provide a continuous film feeding device provided with a holding means capable of holding the leading edge of the film reliably.

[0010]

As a means for solving the above-mentioned problems, the present invention relates to a method in which a plurality of films are wound around a film winding core rotatably provided in a case, in which A film consisting of the end and the leading end of the film to be wound next, wound so that the rear end is on top of the leading end, and when feeding and feeding the film, the leading end of the next film is pulled out by this overlapping winding part and continuously fed. The continuous supply method was adopted.

In this case, it is preferable that, when the above-mentioned lap winding is performed, the lap winding is performed while pressing the roller toward the center of the winding core.

Further, a film core is rotatably provided in a case having a lid plate which can be opened and closed as an apparatus for carrying out the method of any of the above inventions, and the outer periphery of the film core is provided with a rear end of the first film. A film retainer is provided below to press the film to be wrapped with the leading edge of the next film over with a roller, and a receiving roller that feeds the film in combination with an external feed roller near the opening for film withdrawal provided at an appropriate position on the case. That is, a continuous film feeding device having the above is adopted.

In this device, as a means for solving the second problem, the receiving roller is provided by an elastic member so that the shaft supporting position can be displaced, and an opening for inserting an external feeding roller is provided near the receiving roller. The inner surface of the cover plate between the roller and the roller is preferably formed as a film retainer.

[0014]

In the continuous film feeding method according to the first aspect of the present invention having the above-mentioned structure, the respective films are continuously sent out by winding the films on the winding core without overlapping each other with the ends wound on each other. To wrap each film, wrap the first film wound on the core with the next film, but slide the trailing edge of the next film under the end of the first film. By constantly pressing the overlapping portion with the pressing roller, the film can be continuously fed without splicing the end.

In the second aspect of the present invention, the film is wound while being pressure-bonded by the roller toward the center of the core during the lap winding so that the film is reliably wound around the core.

A third invention is a continuous film feeding apparatus for carrying out the method according to the first or second invention, wherein a film is wound around a winding core in a case by any one of the above methods, and is provided outside. The film can be fed by incorporating a receiving roller that feeds the film in combination with the roller.

In the fourth invention, the receiving roller is provided by an elastic supporting member so that the shaft supporting position can be freely displaced. An opening for inserting an external feeding roller is provided near the receiving roller, and the feeding roller is provided. Since the inner surface of the cover plate between the roller and the roller is formed as a film retainer, the contact position of both rollers that sandwich the film is located inside the inner surface of the case cover plate when the external feed roller and the receiving roller are engaged, and At the time of use, the tip of the film is held between the rollers by receiving the inner surface of the cover plate.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view showing the internal structure of the continuous film feeding apparatus of the embodiment. It is shown in a state where a side cover in the direction of arrow AA shown in FIG. 2 is removed so that the internal structure can be seen.

This continuous film feeding apparatus 1 has a case 2
It is provided with a rotatable film core 3 and a plurality of sets (4 sets in the illustrated example) of roller support arms 5 each having a film pressing roller 4 for pressing the film in the direction of the center of the film. Reference numeral 6 is a rotation support shaft of the winding core 3, and 7 is a lid of the case 2. 2 is a side view of the continuous film feeding device 1, a sectional view taken along the line AA of FIG. 2 is shown in FIG. 3A, and a sectional view taken along the line BB of FIG. Shown in b).

The roller support arm 5 is rotatably supported by a support shaft 8 for each arm, and the tip end of the roller support arm 5 is lightly pressed toward the center of the winding core 3 by an elastic spring 8a (not shown). It is provided so as to always press the film toward the center of the winding core. The elastic spring 8a is the support shaft 8
A coil spring may be provided on the arm spring, or a leaf spring may be provided along the arm in an appropriate shape with respect to the arm.

A film f is formed at one corner inside and outside the case 2.
A pair of rollers including a feeding roller 10 and a receiving roller 11 are provided so that the film f can be fed out from the film feeding port 12 provided at the end of the case 2.
The feed roller 10 is a one-way roller,
When the fed film f is pulled with a torque of a predetermined value or more, it spins idle, and when the pulling force disappears, the driving force to the feed roller 10 feeds the film f. A film guide 13 is provided at a position immediately after exiting the film outlet 12.
The film is fed through the guide hole 14 and conveyed in a predetermined direction.

Since the feed roller 10 is a drive roller for the film f, its rotary shaft 10a is connected to a drive source such as a motor (not shown) and driven by its power.
The lid 7 of the case 2 is constructed so that it can be manually opened and closed centering on the hinge at the right end.

The continuous film feeding apparatus 1 of the embodiment constructed as described above is used as follows. The continuous film feeding apparatus 1 is a photographic printing apparatus 2 as shown in FIGS.
It is mounted with the film guide 13 in the vicinity of the film feeding section P of 0 or in a state where the film guide 13 is attached in advance. 22 is an auto negative mask, and 23 is a mirror tunnel.

As shown in FIG. 6, a conveying device 30 composed of a large number of rollers is provided in the photographic printing device 20, and the film f fed from the continuous film feeding device 1 is transferred to the printing exposure stage X by the conveying device 30. Although the image is sent for printing exposure, this is not directly related to the present invention, and a detailed description thereof will be omitted. 41 is a light source, 42 is a light control filter, 43 is a mirror tunnel, and 44 is a negative mask.

A plurality of films f (for example, 5 to 10) are provided in the continuous film feeder 1 mounted as described above.
In advance, as shown in FIG. 4, the ends of the respective films are wound in such a manner that they are gradually overlapped at the overlapping portion. In this overlapping portion, there is a little extra length portion other than the image frame at the end of each film, and the respective portions are overlapped.
Since the thickness of the film f is extremely thin, the winding diameter does not change so much even if they are overlapped with each other at the overlapping portion.

Regarding the overlap of the above-mentioned films f, as shown in the drawing, the first portion of the next film f is slid under the end of the first film f wound on the winding core 3 so as to be overlapped. The overlapping portion is always pressed by the film pressing roller 4, whereby the film f is continuously fed.

In order to obtain such an overlapping portion of the film f, when the film is wound around the continuous film feeding device 1, the lid 7 of the case 2 is opened, and the second film, the third film, ...
Insert the films so that they will overlap each other as described above when they are rolled up.

When the film f is fed out, the leading end of the film f on the top is previously fed to the feeding roller 10 and the receiving roller 11.
, And the driving force is transmitted to the feed roller 10 through the rotary shaft 10a, so that the film f is fed out.

When the film f is fed into the photographic printing apparatus 20, the high speed roller 30 provided at the first position starts drawing the film f at high speed. For this reason, thereafter, the feed roller 10 of the continuous film feeding device idles, and when the overlapping portion of the film f passes the feeding roller 10, the pressure contact force applied to the overlapping portion of the film f is released and the film f is separated from the succeeding film f.

The transmission of the driving force to the feed roller 10 is stopped when the feed roller 10 starts idling. Therefore, the rotation of the feed roller 10 stops at the moment when the preceding film f is separated, and the leading end of the following film is held in a state of being sandwiched between the feed roller 10 and the receiving roller 11.

In this way, the film f is fed into the photographic printing apparatus 20, and when it is time to feed the next film f, the feed roller 10 is activated again to feed the film f. Therefore, when accommodating a plurality of films in the film supply device 1 in advance, it is not necessary to splice the films as in the conventional case, and the films are continuously fed without providing any connecting means. be able to.

FIG. 7 is a perspective view of a film continuous feeding apparatus of another embodiment, and FIG. 8 is a main sectional view. The basic structure is the same as that of the first embodiment, except that the external shape, the mounting base being freely attachable, and the use of the lid plate to provide a pressing mechanism for the film front end are different. The same functional members are designated by the same reference numerals and description thereof is omitted.

The outer shape of the case 2 is a semi-circular shape having a roundness in this embodiment. A mount 21 is provided on the upper surface of the case of the photo printing machine 20, and the case 2 of the continuous film feeder 1 is tilted together with the mount 21.
Is detachably attached. The mounting base 21 is a substantially triangular vertical plate as shown in the drawing, the case 2 is mounted on the front side of this vertical plate, and the drive motor M for the feed roller 10 is mounted on the opposite side.

A mounting seat 15 is provided at the end of the film guide 13, and another mounting seat 22 is provided above the mounting base 21, and the mounting seat 22 is formed in a U shape.
Mounting pins 16 and 17 in the recesses provided in
The case 2 is attached via the. Although not shown,
A stopper is provided to prevent the mounting pins 16 and 17 from coming off after mounting.

In FIGS. 9A and 9B, the arrow A- in FIG.
The sectional view seen from A and BB is shown. Feed roller 1
No. 0 is cantilevered via a rotary shaft 10a penetrating the mount 21, and a timing belt 10b for movement is attached to the opposite end. Timing belt 10
b is engaged with the drive motor M of FIG.

FIG. 10 is a view for explaining a film feeding state corresponding to FIG. As can be seen from the figure, in this embodiment as well, the films are overwound without splicing, and the leading end of the next film is inserted under the trailing end of the first wound film. Therefore,
The length of the lap winding must be longer than the distance between the pressing roller 4 and the feed roller 10 at the time of feeding.

Further, in this embodiment, the film core 3 is provided with a film front end pressing member 3a for securely fixing the front end of the film to be wound first to the core 3. The pressing member 3a is made of a spring material, and the film f
When all are fed, the tip rises slightly from the surface of the core 3, and the film is wound so that the film f is sandwiched between the pressing member 3a and the core 3.

FIG. 11A is a partially enlarged view of the vicinity of the feed roller 10, and FIG. 11B is a sectional view taken along the line BB. As shown, the feed roller 10 is a drum 10 '.
Is formed as a roller portion having a large diameter at both ends of the lid 7, and the opening 18 provided corresponding to the lid 7 is also formed to have a width that allows the roller portion to enter. It projects slightly inward. The receiving roller 11 is provided with a spring bearing 11 a at the end of its rotating shaft protruding from the case 2, and is elastically supported by a coil spring 11 b provided on the side portion of the case 2.

Therefore, as shown in FIG. 11A, when the case 2 of the continuous film feeding device 1 is mounted on the mounting base 21, the feed roller 10 enters from the opening 18 to the inside and pushes the receiving roller 11. The contact surfaces of both rollers are located slightly inside the inner surface of the lid 7 of the case 2, and the film f is sent out in this state.

When the continuous film feeding device 1 is removed from the mount 21, the front end of the film is held by the lid 7 as follows. As shown in (a) and (b) of FIG.
When the film supply device 1 is removed and the leading end of the film is drawn near the delivery port 12 of the case 2 and the lid 7 is closed in this state, the engagement between the feed roller 10 and the receiving roller 11 is released, but the lid 7 is removed. Both ends of the film presser 19 on the inner side of are engaged with the different diameter portions 11c of the receiving roller 11 to press the film f therebetween. Therefore, when the lid 7 is closed, the leading edge of the film f is automatically pressed and held in the case 2.

[0041]

As described above in detail, in the continuous film feeding method of the first invention of the present application, a plurality of films are wound around the film core by lap winding and continuously fed one by one. There is no need to set a cartridge in the photoprinting device for each film or to splice a plurality of films with tape in advance like in the above, and there is an advantage that a plurality of films can be automatically and continuously supplied. can get.

In the continuous film feeding method according to the second aspect of the present invention, by pressing the film with the roller, the film can be surely wound around the winding core without loosening.

In the continuous film feeding device according to the third aspect of the invention, the film is wound around the winding core provided in the case without overlapping by splicing between the films, and a receiving roller corresponding to the feeding roller is provided and the film is wound. The film is formed so that it can be fed out freely, any of the above methods can be reliably executed, and the supply device has a simple structure and is easy to operate.

In the supply device of the fourth invention, the receiving roller is elastically supported, and the contact position is inside the inner surface of the cover plate when the receiving roller and the feed roller correspond to each other, and the receiving roller and the cover plate when not in use. Since the film is held between the inner surface and the receiving roller, the leading end of the film does not move carelessly when not in use, and the film can be reliably fed out when in use.

[Brief description of drawings]

FIG. 1 is a perspective view showing an internal structure of a continuous film feeding device according to an embodiment.

FIG. 2 is a longitudinal cross-sectional view of a continuous film feeding device according to an embodiment.

FIG. 3 is a cross-sectional view taken along arrows AA and BB of FIG.

FIG. 4 is an explanatory diagram of operation

FIG. 5 is a front view of a side view of a photographic print.

[Fig. 6] Internal function diagram of the above

FIG. 7 is a perspective view showing the internal structure of another embodiment.

8 is a main sectional view of the embodiment of FIG.

9 is a cross-sectional view taken along the lines AA and BB of FIG.

FIG. 10 is an explanatory diagram of the operation

FIG. 11 is an explanatory view of the action of the feed roller,
(A) is an enlarged cross-sectional view of the feed roller portion, (b) is a cross-sectional view seen from the arrow BB of (a).

FIG. 12 is an explanatory view of the holding action of the lid plate, (a)
Is an enlarged cross-sectional view of the receiving roller portion, (b) is an arrow B of (a)
-Cross section view from B

[Explanation of symbols]

 1 continuous film feeding device 2 case 3 core 4 presser roller 5 roller support arm 6 rotation support shaft 7 case substrate

Claims (4)

[Claims] 1. A plurality of films are wound around a winding core of a film rotatably provided in a case, in which case the trailing end of the film wound first around the winding core and the leading end of the next winding film are located above the leading end. A continuous film feeding method, in which the film is continuously wound up and wound up, and when the film is unwound and fed, the leading end of the next film is pulled out by this overlapping wound portion and continuously fed. 2. The continuous film feeding method according to claim 1, wherein, during the lap winding, the lap winding is performed while pressing the roller in the center direction of the winding core. 3. A film in which a film core is rotatably provided in a case having a lid plate which can be opened and closed, and the outer periphery of the film core is wrapped with the next film front end under the rear end of the first film. A film continuous feeding device in which a film presser for pressing the film is provided, and a receiving roller for sending the film in combination with an external feed roller is provided in the vicinity of the film drawing opening provided at an appropriate position of the case. 4. The receiving roller is provided by an elastic member so that the shaft supporting position can be displaced, and an opening for inserting an external feeding roller is provided near the receiving roller, and an inner surface of a cover plate between the feeding roller and the roller is used as a film pressing member. It formed, The film continuous supply apparatus of Claim 3 characterized by the above-mentioned.