JPH0425697Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a roll paper magazine equipped with a winding device for the roll paper after printing, in an automatic photo printing apparatus that continuously prints on roll paper made of long photographic paper. It is.

The above-mentioned automatic photo printers can be roughly divided into upright type and inverted type. In the former type, the roll paper is wound up under the printer, and therefore the winding magazine is located near the floor or is placed on the floor and equipped with casters for easy handling. On the other hand, in the latter case, the roll paper runs above the printing device, and the magazine that winds up and stores it is stored at the top, so it is small and lightweight because it is handled by loading and unloading from the top. It is desirable that However, even if it is an upright type, it goes without saying that it is more desirable for it to be small and lightweight, considering things like collecting and organizing a large number of magazines that are not attached to the printing device. Not, also,
It is also clear that doing so is advantageous in designing the structure of the printing device.

As described above, the magazine described above is used in an automatic printing apparatus, but as part of the automatic printing process, it is required to have a function of automatically winding up the roll paper. In other words, similar to automatic film loading in a camera,
The starting end of the roll paper must be able to be wound around the take-up shaft of the magazine without the use of human hands. Since a device for this purpose is provided in the magazine, it is difficult to downsize conventional magazines, not only the upright type but also the inverted type, and therefore the weight has to be increased. For example, JP-A-57-
As in the invention described in Publication No. 205731, a large space is provided between the roll paper winding shaft and the bottom of the magazine case for the operation of the automatic winding device, and the magazine case is expanded by that much space. It had the disadvantage of being large and therefore heavy.

The present invention was developed in view of the above points, and its purpose is to automatically perform winding (winding, winding completion) and to save space for operation. An object of the present invention is to provide a roll paper magazine equipped with a small-sized winding device.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

First, to explain the first embodiment, in FIGS. 1 and 2, 1 is a roll paper, 2 is an inlet 2a of the roll paper 1, and a mounting plate 2 for other members.
b, 2c; 3 is a winding shaft driven clockwise in FIG. 1 by a torque motor (not shown) or a drive device with a slip function; 4;
The core of the roll paper 1 is detachably attached to the winding shaft 3 via the intermediate member 5, and the first core 6, 7, 8 is rotatably supported on the mounting plates 2b, 2c.
The second and third shafts 9, 10, 11, and 12 are guide rollers rotatably supported by the first and second shafts 6 and 7, and the guide rollers 13 and 14 are integral with the first and second shafts 6 and 7. The interlocking gears 15 are fixed to the first shaft 6 at the base and have a receiving roller 1 at the end.
6 is pivotally attached to an upper guide, 17 is a lower guide whose base is fixed to the second shaft 7, 18 is a grip lever whose base is pivoted to the third shaft 8, and a detection roller 19 is pivoted to the end. 20 and 21 are links connecting the lower guide 17 and the grip lever 18; 22 is a link connecting the grip lever 18 to the base thereof coaxially with the detection roller 19;
The upper grip 24 has one end pivoted to the grip lever 18 coaxially with the detection roller 19 and the base thereof pivoted to the grip lever 18.
The lower grip 26, to which the wrapping guide roller 25 is pivotally attached, gives levorotation and dextrorotation to the upper grip 22 and the lower grip 24 using the pivot point at their base as a fulcrum, and the wrapping guide rollers 23, 25 Grip springs 27 biased toward each other are fixed to the second shaft 7, and a signal plate provides a signal to the photodetector 28;
W is the width of the lower grip 24.

The operation will be explained below.

In FIG. 1, the starting end of a roll paper 1 is transferred from a printing device (not shown) into a magazine 2 through an inlet 2a, guided by guide rollers 9 to 12, an upper guide 15, and a lower guide 17, and reaches a core 4. Indicates the state of

In the state shown in FIG. 1, the winding shaft 3 integrally rotates the winding core 4 to the right at a circumferential speed faster than the speed at which the roll paper 1 is fed. In the grip lever 18, the upper and lower grips 22, 24 press the winding guide rollers 23, 25 against the winding core 4 by the grip spring 26, and the winding guide rollers 23, 2
5 is smaller than the diameter of the winding core 4, the detection roller 19 is pressed against the winding core 4 by being held by the upper and lower grips 22, 24.

When the starting end of the roll paper 1 is fed in this state, it is passed through the winding guide roller 25, the detection roller 19, and the winding guide roller 23 to the winding core 4.
She is forced into close contact with him and gets caught up in it. In the winding up to this point, the peripheral speed of rotation of the core 4 is faster than the speed at which the roll paper 1 is fed, so a slip occurs between the two, but when the roll paper 1 wraps around the core 4 one turn or more, Since the roll paper 1 wraps around the core 4 and joins them together,
A brake is applied to the winding shaft 3 to reduce the speed of a torque motor (not shown), or a slip device acts to cause the connection between the winding shaft 3 and the drive device to slip. A signal indicating completion of winding is issued by decelerating the torque motor or by performing the above-mentioned slip.

The baking work is done and the roll paper 1 is placed on the core 4.
The diameter of the winding gradually increases as the winding is repeated. As the winding diameter increases, the upper guide 15 is pushed up by the receiving roller 16 and rotates to the left.
Lower guide 17 through engagement of connecting gears 13 and 14
rotates to the right. The grip lever 18 is the detection roller 1
9 is pushed and rotates to the right, and the distance between the winding guide rollers 23 and 25 increases due to the movement of the pivot point due to this right rotation and the increase in the winding diameter, and the upper grip moves against the grip spring 26. 22, lower grip 24
The space between is widened.

By moving the detection roller 19 as the winding diameter increases, the winding guide roller 23,
When the inner distance of the outer periphery of the grip lever 25 becomes equal to or slightly smaller than the winding diameter, the grip spring 26 loses its holding force, and the grip lever 18 loses its grip due to the weight of itself, the upper grip 22, and the lower grip 24. Turn to the right. This grip lever 18
The clockwise rotation is reliably performed even if the spring torque of the grip spring 26 is somewhat strong or otherwise varies. During this right rotation, lower grip 2
4 is a grip spring 26 that presses the winding guide roller 25 against the outer periphery of the roll paper 1 wound around the core 4 at the end, and the base is connected to the shaft of the detection roller 19 with the third shaft 8 as the fulcrum. Since the lower grip 24 operates by following a rotational locus, the operating space of the lower grip 24 between the roll paper 1 wound around the core 4 and the inside of the bottom of the magazine 2 may be about the width W of the lower grip 24.

When the grip lever 18 rotates to the right and falls, the lower guide 17 also follows through the links 20 and 21 and rotates to the right.
It rotates to the left in conjunction with the engagement with 14. This left rotation of the upper guide 15 is caused by right rotation due to the weight of the grip lever 18 via the links 20 and 21.
Because it is lighter than that, even after left rotation, it has dextrorotation due to its own weight, and is connected to the lower guide 17, which is lighter than the upper guide 15. Left rotation is provided through the meshing of gears 13 and 14. That is, in this state, both ends of the links 20 and 21 are pulled to form a straight line.

The lower guide 17 is rotated to the right by the weight of the grip lever 18, and its tip is on the left side in FIG. However, its posture is kept constant by the grip lever 18.

As the baking process progresses, the amount of roll paper 1 wound around the core 4 increases and reaches a predetermined storage limit, and therefore, when the winding diameter of the roll paper 1 wound around the core 4 reaches a predetermined value, Its outer peripheral portion contacts the tip of the lower guide 17, and is gradually pushed and rotated to the right. By this right rotation, the lower guide 17 rotates the signal plate 27 via the second shaft 7,
The photodetector 28 is activated to send a signal to stop the printing operation.

In a magazine 2 in which no roll paper 1 has been fed into the magazine 2 yet, that is, in an empty magazine 2, the preparatory operation is to manually move the upper grip 2.
2 and the lower grip 24 are spread out against the grip spring 26, and the roll paper 1 is fed into the core 4 attached to the intermediate member 5 in advance. state.

In the embodiment shown above, when the grip lever 18 separates from the winding core 4, it rotates to the right so that it falls, but when the roll paper 1 is wound up by rotating the core to the left, In this case, the grip lever must rotate to the left and separate from the winding core. In the former case, the printing device is of an inverted type;
In the latter case, this is due to the difference in the winding rotation direction of the core due to the upright type.Hereinafter, the embodiment of the present invention in the latter case will be referred to as the second embodiment and the third embodiment This will be explained with a diagram.

In FIG. 3, the configuration and operation shown in FIG. The lower grip 124 has a pin stop 124a formed therein. The grip lever 118 is given levorotation by a spring 129, and the upper guide 115 is provided with a spring hook 11.
5a is provided and is given levorotation by a spring 130.

At the time when the upper grip 122 and the lower grip 124 separate from the outer circumference of the roll paper 1 wound around the core 104 under the same conditions as in the first embodiment, the left rotation of the spring 129 causes the upper grip 122 and the lower grip 124 to separate. do. At this time, the upper guide 115 also has the spring 13
It is forced to rotate dextrally against the levorotation of 0.

When the grip lever 118 rotates to the left,
The pin 118a engages the pin contact 124a to maintain the posture of the lower grip 124, and the upper grip 122
is supported by the grip spring 26 and the subsequent winding core 10
To maintain a posture that does not hinder the increase in the wrapping outer circumference of the roll paper 1 wound around the roll paper 4.

As described above, according to the present invention, when wrapping,
Upper grips 22, 122 and lower grips 24, 12 disposed on grip levers 18, 118
4. The lower guide 17 and the upper guides 15, 115 allow reliable winding, and
When a certain amount of roll paper 1 has been wound, these members are retracted from the roll paper 1, and when the roll paper 1 has been wound by a predetermined amount near the end of winding, the end of winding is determined by pressing the roll paper 1. Lower guide 17 by
Moreover, the operating space required for retracting these members, especially the grip levers 18, 118 on which the upper grips 22, 122 and the lower grips 24, 124 are disposed, can be detected. is extremely small.

Therefore, it is possible to obtain a compact winding device that is capable of automatic winding and is space-saving, which is the purpose of the present invention, and not only makes the magazine itself small and lightweight, but also reduces the overall size of the photo printing device. It also has a large contribution to make.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main parts showing the first embodiment of the present invention, Fig. 2 is a sectional view taken along arrow A-A' in Fig. 1,
FIG. 3 is a front view of main parts showing a second embodiment of the present invention. 1... Roll paper, 2... Magazine, 2a
...Inlet, 2b, 2c... Mounting plate, 3... Winding shaft, 4,104... Winding core, 6, 7, 8... First,
2nd and 3rd axes, 9-12...Guide roller, 1
3, 14... Interlocking gear, 15, 115... Upper guide, 17... Lower guide, 18, 118... Grip lever, 19... Detection roller, 20, 21...
Link, 22,122...Upper grip, 24,1
24...lower grip, 23, 25...wrapping guide roller, 26...grip spring, 27...signal plate, 28...photodetector.

Claims (1)

[Claims for Utility Model Registration] Grip levers 18, 118 whose bases are pivotally supported by a shaft 8 disposed in the magazine 1 and which pivotally support the detection roller 19 at their ends; and a base coaxially with the detection roller 19. The grips 22, 122 are pivotally supported, and the guide roller 23 wrapped around the end is pivoted, and the base is pivoted coaxially with the detection roller 19, and the guide roller 25 wrapped around the end is pivoted. the lower grip 24,124, the upper grip 22,122 and the lower grip 24,1.
24, and a guide roller 23,
Group spring 26 that urges 25 to approach
a lower guide 17 whose base is fixed to a shaft 7 disposed in the magazine 1 and connected to the grip levers 18, 118 by links 20, 21; It consists of fixed upper guides 15 and 115 and interlocking gears 13 and 14 that are integrally arranged on shafts 6 and 7 and mesh with each other, and roll paper 1 made of a long photographic paper is placed on core 4. , 104, when it is not wrapped around
Due to the bias of the grip spring 26, the detection roller 19
and the winding guide rollers 23, 25 are the winding cores 4, 10.
A lower guide 17 and an upper guide 15, 1 are in pressure contact with the roll paper 1 and are in pressure contact with the roll paper 1
15 is held, and as the roll paper 1 is wound a certain amount around the core 4, 104, the detection roller 19 and the winding guide rollers 23, 25 are separated from the core 4, 104, and the grip lever 18, 118 is moved to the retracted position. As the lower guide 17 rotates, the lower guide 17 also rotates via the links 20 and 21, and the upper guides 15 and 115 also rotate via the connecting gears 13 and 14 to maintain their respective retracted positions. , When the winding diameter of the roll paper 1 further increases and reaches a predetermined value, the outer circumferential portion of the roll paper 1 contacts the end of the lower guide 17 and the lower guide 1
A roll paper magazine that rotates 7 to detect the end of winding.