KR100194369B1 - Paper Magazine - Google Patents

Abstract

Paper magazine that can feed paper from paper rolls at high speed with high precision. Between the drive shaft and the paper feed roller is provided a forward rotation transmission mechanism for transmitting only the rotation of the drive shaft in the forward direction to the feed roller, and a reverse rotation transmission mechanism for transmitting only the rotation of the drive shaft in the reverse direction to the feed roller. A rotary drive mechanism is provided between the drive shaft and the core for non-rotatingly supporting the paper roll in order to transfer the forward and reverse rotation of the drive shaft to the core. In order to feed the paper from the paper roll, the feed roller and the core rotate at a speed higher than the circumferential speed of the paper roll when the diameter of the paper roll is maximum so that the circumferential speed of the feed roller exerts a suitable tension on the paper to be fed. It is rotated in the paper feed direction while controlling.

To rewind the paper to the paper roll, the feed roller and core control the rotation speed of the core to be slower than the paper roll's circumferential speed when the diameter of the paper roll is minimum so that the circumferential speed of the feed roller is applied to the paper to be rewound. While rotating in the direction of rewinding the paper.

Description

Fairer Magazine

1 is a perspective view of an embodiment of a paper magazine according to the present invention.

2 is a longitudinal cross-sectional view of the paper magazine.

3 is a sectional view taken along line III-III of FIG.

4 is a sectional view taken along line IV-IV of FIG.

5 is a perspective view of a rotational transmission mechanism for the transfer roller and the core.

6 is a partial cross-sectional view of the core.

7 is a cross-sectional view of the reverse rotation electric mechanism.

8 (a) is a sectional view of a driven gear,

FIG. 8 (b) is a cross-sectional view taken along the line VIII-VIII of FIG. 8 (a).

* Explanation of symbols for main parts of the drawings

1: magazine case 4: fairer outlet

5 core axis 8 core

11: feed roller 12: pressing roller

14: drive shaft 15: driven gear

16: magazine setting unit 17: drive gear

20: forward rotation motor mechanism 30: reverse rotation motor mechanism

50: rotational motor mechanism

[Background of invention]

The present invention relates to a paper magazine for storing a roll of photo paper to be conveyed into an exposure unit of a photo printer.

Photographs are used to negatively print an image on photo paper (hereinafter referred to as paper) by irradiating light with negative light. The paper is generally conveyed into the printer by unfolding from the paper roll housed in the paper magazine set to the printer.

One conventional paper magazine has a magazine case for housing a paper roll rotatably supported in a core rotatably mounted in the case. The conveying roller and the pressing roller are provided along the paper conveying path from the paper roll to the paper outlet provided in the paper magazine case. The paper sandwiched between the rollers is conveyed toward the paper outlet by rotating the feed roller. Rotational resistance is applied to the core to prevent the paper from sagging.

In this arrangement, when the paper is conveyed at high speed to increase the print speed, the tensile force applied to the paper tends to increase correspondingly due to its resistance applied to the core. The increased tensile force creates a slip between the feed roller and the paper, making it difficult to transport the paper with high precision.

An object of the present invention is to provide a paper magazine capable of conveying paper at high speed with high precision.

[Overview of invention]

According to the present invention, a magazine case, a paper roll, a core mounted in a magazine case for rotatably supporting the paper roll, a drive shaft mounted in a magazine case driven in both directions, and a magazine case provided in the magazine case from the paper roll. A feed roller provided along a paper feed passage leading to a paper outlet, a press roller pressed against the feed roller, and a drive shaft and a feed to transfer only the rotation of the drive shaft to the feed roller in a forward direction to rotate the feed roller in the direction of feeding the paper. Forward rotation motor mechanism provided between the rollers, reverse rotation power mechanism provided between the drive shaft and the transfer roller to transfer only the rotation of the drive shaft in the reverse direction to the feed roller in order to rotate the feed roller in the rewinding direction of the paper and the core In both directions The circumferential speed of the feed roller is faster than the circumferential speed of the paper roll when the paper roll diameter is maximum, and the circumferential speed of the feed roller is the core while the drive shaft is rotating in the reverse direction while the drive shaft is rotating forward. By controlling the rotational speed of the core to be slower than the circumferential speed of the core when the diameter is the smallest, the paper magazine is composed of a rotational drive mechanism provided between the core and a drive shaft that exerts a predetermined tensile force on the paper that is developed from the paper roll. To provide.

While the drive shaft is rotated in the forward direction, the rotation is transmitted to the feed roller through the forward rotation drive mechanism. By the forward rotation of the feed roller, the paper is conveyed toward the paper outlet.

At the same time, the rotation of the drive shaft is transmitted to the core through the rotary transmission mechanism, so that the paper roll is rotated in the direction of feeding the paper. Since the rotational motor mechanism controls the rotational speed of the core, the circumferential speed of the paper roll is slower than the circumferential speed of the feed roller so as to apply a predetermined tensile force to the conveyed paper.

While the drive shaft is rotated in the reverse direction, the rotation is transmitted through the reverse transmission to the feed roller so as to rotate the feed roller in the reverse direction. Thus the paper is rewound.

At the same time, the rotation of the drive shaft is transmitted through the rotary transmission to the core to rotate the core in the paper rewind direction.

In this state, the rotational speed of the core is controlled so that the circumferential speed of the paper roll is faster than the circumferential speed of the feed roller, so that a predetermined tensile force is applied to the paper to be rewound. Thus, the paper can be rewound without slowing or wrinkling.

Other features and objects of the present invention will become apparent from the following description with reference to the accompanying drawings.

Detailed Description of the Preferred Embodiments

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the magazine case 1 consists of a case body 2a and a cover 2b. As shown in FIG. 3, the cover 2b is mounted to the case body 2a to pivot about the pin 3 for closing and opening.

The paper outlet 4 is provided in the bottom plate of the magazine case 1 near the front end of the case magazine. The core shaft 5 is provided in the magazine case 1 yarn.

As shown in FIG. 2, the bearing metal 6 is rotatably mounted to the core shaft 5 at both ends of the core shaft. The bearing metal is detachably supported by the support portion 7 provided on the inner surface of the side plate of the case body 2a.

The core 8 is rotatably mounted about the core shaft 5 to rotatably support the paper roll R. As shown in FIG. As shown in FIG. 3, a paper guide 9 is provided along the conveyance path of the paper P, which extends from the paper roll R to the paper outlet 4.

The guide roller 10 for guiding the paper P is rotatably mounted on the paper guide 9. Below the guide roller 10, there is provided a feed roller 11 and a compression roller 12 pressed against the feed roller 11. The feed roller 11 has a roller shaft 11a (FIG. 4) rotatably supported by side plates 13 provided on both sides of the paper guide 9.

As shown in FIG. 4, the press roller 12 is supported by a roller shaft 12a supported by a support member 13b provided near the paper guide surface of the paper guide 9 so as to be movable toward the feed roller 11. Has) The spring 13a presses the roller shaft 12a to press the pressing roller 12 against the feed roller 11.

Referring to FIG. 3, the drive shaft 14 is provided below the core shaft 5. As shown in FIG. 4, the drive shaft has an end rotatably supported by the side plate 13 of the paper guide 9 and has a driven gear 15 mounted at one end of the outside of the magazine case 1. Have.

As shown in FIGS. 1 and 2, the driven gear 15 engages with the drive gear 17 provided in the magazine setting portion 16 when the magazine case 1 is placed in the magazine setting portion 16. It is.

Referring to FIG. 5, between the drive shaft 14 and the roller shaft 11a of the feed roller 11, the forward rotation motor mechanism 20 for transmitting the rotation of the drive shaft 14 in the forward direction, and the drive shaft in the reverse direction ( A reverse rotation drive mechanism 30 is provided for transmitting the rotation of 14.

The forward rotation drive mechanism 20 is connected to the first gear 21 mounted on the drive shaft 14, the second gear 22 engaged with the first gear 21, and the roller shaft 11a of the feed roller 11. The third gear 23 is mounted.

As shown in FIGS. 8A and 8B, the first gear 21 is rotatably mounted to the drive shaft 14. The driving plate 24 fixed to the drive shaft 14 is in contact with one side of the first gear 21.

The rolling plate 24 has an elongated hole 25 in which the pin 26 provided on one side of the first gear 21 is accommodated. The spring 27 biases the pill 26 to one side in a state adjacent to one end of the elongated hole 25.

When the drive shaft 14 is rotated, the first gear 21 is rotated because the pin 26 remains adjacent to one of the long holes 25. The rotation of the first gear 21 is transmitted to the third gear 23 through the second gear 22.

Returning to the fifth road, the unidirectional clutch 28 is disposed between the third gear 23 and the roller shaft 11a of the feed roller 11. This is locked when the third gear 23 rotates in the forward direction, and therefore transmits the rotation of the third gear 23 to the roller shaft 11a.

As shown in FIG. 5 and FIG. 7, the reverse rotation drive mechanism 30 includes a screwed shaft 31 fixed to the drive shaft 14, a first screwed to the threaded shaft 31. It consists of a clutch 33 supported by the drive shaft 14 to one of the gear 32 and the first gear 32. The second gear 35 is mounted around the housing 34 of the clutch 33.

The first gear 32 is engaged with the third gear 36, while the second gear 35 is engaged with the fourth gear 37 provided coaxially with the third gear 36.

The third gear 36 and the fourth gear 37 are rotatably supported by the gear support shaft 38.

The torque limiter 39 applies a load to the third gear 36 and frees the third gear when the load exceeds a predetermined value.

The load applied to the third gear 36 prevents the rotation of the first gear 32. While the drive shaft 14 is rotating in the forward direction, the first gear 32 screwed to the screw-cut shaft 31 is moved to the left in FIG. While the drive shaft 14 is rotating in the reverse direction, it is moved in the right direction.

The clutch 33 has a knob 40. When the first gear 32 is moved in the right direction, it pushes the knob 40, and in turn, the roller 45 between the inner ring 44 and the drive shaft 14 has both the inner ring 44 and the drive shaft 14. The housing 34 is rotated in the same direction as the drive shaft 14 by pushing the inner ring 44 of the clutch until it engages.

Rotation of the housing 34 is transmitted to the fourth gear 33. The rotation of the fourth gear 37 is in turn transmitted to the seventh gear 43 fixed to the roller shaft 11a via the fifth gear 41 and the sixth gear 42.

As shown in FIG. 5, the rotational motor mechanism 50 is provided between the drive shaft 14 and the core 8.

The rotation of the drive shaft 14 is transmitted to the core 8 after being decelerated by the rotational motor mechanism 50 so that a constant tensile force is always applied to the paper developed from the paper roll R.

The rotary transmission mechanism 50 has a first gear 51 fixed to the drive shaft 14, a second gear 52 meshed with the first gear 51, and a third gear meshed with the second gear 52. It consists of a gear 53.

Since the third gear 53 is fixed to the core shaft 5 as shown in FIG. 6, the rotation of the drive shaft 14 is transmitted to the core shaft 5.

The unidirectional clutch 54 and the torque limiter 55 are mounted between the core shaft 5 and the core 8 (FIG. 6).

The unidirectional clutch 54 consists of an outer ring 56 fixed to the core 8 and an engaging element 57 mounted between the core shaft 5 and the outer ring 56. The engagement element 57 is locked when the core shaft 5 rotates in the forward direction, thereby transmitting the rotation of the core shaft 5 to the core 8.

The torque limiter 55 includes a fixed friction plate 59 rotatably mounted to the core shaft 5 by pins 58, a movable friction plate 60 movably mounted axially to the core shaft 5, and It consists of a torque transmission cylinder 61 provided on the inner circumference and having a flange 62 inserted between the friction plates 59 and 60. The movable friction plate 60 is biased to one side by the spring 63 towards the fixed friction plate 59.

The torque transmission cylinder 61 has a plurality of claws 64 at one end at its end so as to engage in a hole 65 formed in the outer ring 56 of the unidirectional clutch 54.

The limiter 55 transmits the reverse rotation of the core shaft 5 to the core 8 through the outer ring 56.

The torque limiter 55 allows the core shaft 5 and the core 8 to slip together while the core 8 is rotating faster than the core shaft 5.

Since the rotational motor mechanism 50 and the forward rotation mechanism 20 control the core 8 and the feed roller 11 respectively, the circumferential speed of the feed roller 11 in the paper feed direction is the maximum when the diameter of the paper roll is maximum. It is faster than the circumferential speed of the paper roll R in the forward direction, that is, in the paper feed direction.

In addition, since the rotational motor mechanism 50 and the reverse rotation motor mechanism 30 respectively control the core 8 and the feed roller 11, the circumferential speed of the feed roller 11 in the paper rewinding direction is the diameter of the paper roll. When this is minimum, it is slower than the circumferential speed of the paper roll R in the reverse direction, i.

When the paper magazine of the embodiment is placed in the magazine setting portion 16 of the photographic printer, the driven gear 15 remains engaged with the constituent gear 17 of the photographic printer as shown in FIG. .

With the paper magazine in place, the paper P is transported and rewound in the manner described below.

(1) When feeding paper

The driven gear 15 and the drive shaft 14 are rotated in the forward direction by rotating the drive gear 17.

When the drive shaft 14 is rotated, the rolling plate 24 shown in Figs. 8 (a) and 8 (b) is rotated so that the pin 26 abuts at one end of the elongated hole 25. Thus, the first gear 21 is rotated.

The rotation of the first gear 21 is transmitted to the third gear 23 through the second gear 22. Since the third gear 23 is rotated in the same direction as the drive shaft 14, the unidirectional clutch 28 shown in FIG. 5 is locked. Therefore, since the roller shaft 11a and the feed roller 11 are rotated in the forward direction, the paper P inserted between the feed roller 11 and the pressing roller 12 is transferred toward the exposure unit of the photo printer.

The rotation of the drive shaft 14 while the paper P is being transferred is controlled by the third gear 53 through the first gear 51 and the second gear 52 of the rotational transmission mechanism 50 shown in FIG. Is passed on. Therefore, the core shaft 5 rotates in the forward direction. Since this rotation is transmitted to the core 8 through the unidirectional clutch 54, the circumferential speed of the paper roll R is set to be later than the circumferential speed of the feed roller 11, so that the appropriate tension is conveyed to the paper P. Is applied to.

While the paper P is being fed by rotating the feed roller 11 in the forward direction, the paper roll R is forcibly rotated in the same direction as the feed roller 11.

If the circumferential speed of the paper roll R exceeds the circumferential speed of the feed roller 11, the unidirectional clutch 54 shown in FIG. 6 will slip.

Therefore, it is possible to convey the paper P in a state where a proper tensile force is applied to the paper.

Therefore, since the slip can be prevented between the paper P and the feed roller 11, the paper P can be fed at a predetermined speed with high precision.

When the drive shaft 14 rotates, the first gear 32 of the reverse rotation drive mechanism 30 of FIG. 7 is moved away from the knob 40 to the left in FIG. The clutch 33 is now rotatable about the drive shaft 14.

Therefore, it is rotated by the roller shaft 11a through the seventh gear 43, the sixth gear 42, the fifth gear 41, the fourth gear 37 and the second gear 35.

(2) When rewinding paper

The driven gear 15 and the drive shaft 14 are rotated in the reverse direction by rotating the drive gear 17.

When the drive shaft 14 is rotated in the reverse direction, the first gear 32 of the reverse rotation drive mechanism 30 shown in FIG. 7 is moved in the right direction in FIG. 7, thereby pushing the knob 40 to push the clutch 33. Meshes with

The drive shaft 14 is now coupled to the housing 34 of the clutch 33 via the roller 45, the inner ring 44 and the knob 40. Thus, the housing 34 is rotated in the reverse direction.

The rotation of the housing 34 is transmitted to the seventh gear 43 through the fourth gear 37, the fifth gear 41 and the seventh gear 42 (shown in FIG. 5), so that the feed roller 11 Is rotated in the reverse direction to rewind the paper (P).

In addition, the rotation of the drive shaft 14 is transmitted to the third gear 53 through the first gear 51 and the second gear 52 of the rotation transmission mechanism 50 (FIG. 5). Accordingly, the core shaft 5 is rotated in the reverse direction.

Rotation of the core shaft 5 is transmitted to the core 8 through the claw 64 of the torque transmission cylinder 61 of the torque limiter 55 and the hole 65 formed in the clutch outer ring 56. Therefore, the paper roll R is rotated in the paper rewinding direction.

In this state, since the circumferential speed of the paper roll R is set to be faster than the circumferential speed of the feed roller 11 when the paper roll is minimum, it is possible to rewind the paper without slowing or wrinkles.

When the drive shaft 14 is rotated in the reverse direction, the rolling plate 24 shown in Figs. 8 (a) and 8 (b) is rotated so that the pin 26 is adjacent to the other end of the elongated hole 25. .

Thus, the first gear 21 is rotated. The rotation of the first gear 21 is transmitted to the third gear 23 through the second gear 22. In this state, the unidirectional clutch 28 is disengaged, so that torque is not transmitted to the roller shaft 11a. Therefore, the feed roller 11 is rotated only in the paper rewinding direction.

When the paper P is rewound and then conveyed again, the knob 40 of the clutch 33 shown in FIG. 7 is pushed by the first contribution 32. Therefore, when the paper P is conveyed again, the roller shaft 11a is considered to be rotated by both the forward rotation drive mechanism 20 and the reverse rotation transmission mechanism 30 at different speeds.

But in reality, this can never happen. In other words, the rotation of the drive shaft 14 is transmitted directly to the first gear 32 of the reverse rotation drive mechanism 30, but the forward rotation transmission until one end of the elongated hole 25 is adjacent to the pin 26. It is not transmitted to the first gear 21 of the mechanism 20. However, until the first gear 21 is rotated, the first gear 32 of the reverse rotation drive mechanism 30 moves in the left direction in FIG. 7 until it is released from the knob 40 to free the clutch 33. Will move.

Therefore, the rotation of the drive shaft 14 is no longer transmitted to the roller shaft 11a through the reverse rotation power mechanism 30. In other words, the rotation of the drive shaft 14 is transmitted to the roller shaft 11a only through the forward rotation drive mechanism 20.

Therefore, the feed roller 11 is rotated in the paper feed direction in the same manner as the paper feed.

According to the present invention, the core supporting the paper roll while the feed roller is rotating in the paper feed direction is paper at a speed such that the circumferential speed of the feed roller is faster than the circumferential speed of the paper roll when the diameter of the paper roll is maximum. Rotate in the feed direction.

Therefore, the paper is not subjected to excessively high tensile force while being conveyed, so that the paper can be conveyed at high speed with high precision.

While the feed roller is rotating in the paper rewinding direction, the core supporting the paper roll rewinds at a speed such that the circumferential speed of the feed roller is slower than the circumferential speed of the paper roll when the diameter of the paper roll is minimum. Is rotated. The paper will not be slow or wrinkled because the paper is rewound with proper tension applied to the paper.

It is also possible to transfer the paper sandwiched between the feed roller and the pressing roller to a predetermined position. This makes it possible to omit the advance roller in the paper feed passage in the photo printer.

Claims (2)

Magazine case, paper roll, core mounted in the magazine case for rotatably supporting the paper roll, drive shaft mounted in the magazine case driven in both directions, paper from the paper roll to the paper outlet provided in the magazine case A feed roller provided along the feed passage, a press roller pressed against the feed roller, and provided between the drive shaft and the feed roller to transmit only the rotation of the drive shaft in the forward direction to the feed roller to rotate the feed roller in the direction of feeding the paper. Forward rotation gear mechanism, the reverse rotation gear mechanism provided between the drive shaft and the feed roller to transfer only the rotation of the drive shaft in the reverse direction to the feed roller to rotate the feed roller in the rewinding direction of the paper and the rotation of the drive shaft in the forward and reverse directions to the core Scorpion While the drive shaft is rotating in the forward direction, the circumferential speed of the feed roller is faster than the circumferential speed of the paper roll when the paper roll diameter is maximum, and the circumferential speed of the feed roller is the minimum core diameter while the drive shaft is rotating in the reverse direction. Paper magazine, characterized in that it consists of a rotational drive mechanism provided between the core and a drive shaft for applying a predetermined tensile force to the paper developed from the paper roll by controlling the rotational speed of the core to be slower than the circumferential speed of the core. . The paper magazine according to claim 1, wherein the drive shaft supports the driven gear which is engaged or disengaged with the drive gear provided in the magazine setting portion of the photographic printer.