JPH0789655A - Transfer device equipped with stop mechanism - Google Patents

Abstract

PURPOSE:To smoothly transfer a long sheet shaped transfer body and surely hold the transfer body in a loop formation state by installing a driving clutch and a stop clutch for suppressing the revolution in the transfer direction when drive is suspended. CONSTITUTION:A transfer device is equipped with a clutch 74 for transfer which is meshed with a first gear 70 and transmits only the turning force in the transfer direction to a driving roller 64 under the action of a motor 62, and a clutch 76 for stop which is meshed with a second gear 72 and prevents the revolution of a driving roller 64 in the transfer direction in the state where the drive of the motor 62 is suspended. Since, during the drive of the motor 62, the revolution speed of a second clutch 76 is larger than that of a first clutch 74, the second clutch 76 revolves at the higher speed than that of the driving roller 64, and idle-revolves relatively, and the revolution of the driving roller 64 is not interfered. When the motor 62 stops, the revolution of the driving roller 64 is suppressed by the second clutch 76, and a transfer body is surely held by the driving roller 64 and a nipping roller, and the shift of the top end side to the downstream side is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a conveying device for conveying a long recording medium and having a stop mechanism for holding the recording medium in a loop.

[0002]

2. Description of the Related Art A long sheet-shaped member to be conveyed, for example, a photosensitive material wound in a roll is accommodated, and the photosensitive material is drawn out by a predetermined length and irradiated with scanning light such as a laser beam. There is known an image recording apparatus configured to carry out exposure recording of an image or the like by the method and then cut the photosensitive material into pieces each having a predetermined length and carry the pieces into an automatic developing apparatus.

In this type of image recording apparatus, the photosensitive material conveying speed by the conveying system in the image recording apparatus is lower than the photosensitive material conveying speed by the conveying system in the automatic developing apparatus, so that it is close to the automatic developing apparatus. Then, a transport unit having a special structure is provided.

That is, as shown in FIG. 8, a conveying section 6 is disposed in the image recording apparatus 2 in the vicinity of the automatic developing apparatus 4, and the conveying section 6 includes a driving roller 8 and a nip roller 1.
0, and the drive roller 8 has a clutch (so-called one-way clutch) 14 that transmits the rotational force of the rotary drive source 12 only in the direction of arrow A. A roller pair 16 is arranged on the upstream side of the transport unit 6, while a swingable shutter 18 is provided on the downstream side of the transport unit 6.
In the automatic developing device 4, a pair of rollers 24, 26 for conveying the photosensitive material 22 introduced from the opening 20 opened by the shutter 18 to the developing processing section is arranged.

In such a structure, the rotary drive source 12
The drive roller 8 moves through the clutch 14 under the action of arrow A
When rotated in the direction, the photosensitive material 22 nipped by the driving roller 8 and the nip roller 10 is introduced into the automatic developing device 4 through the opening 20 opened by the shutter 18, and is passed through the roller pair 24, 26 to a predetermined position. Is transported to the development processing section. At that time, although the conveying speed by the roller pair 24, 26 becomes faster than the conveying speed by the conveying section 6, the drive roller 8 can idle around the clutch 14 in the arrow A direction. Therefore, the photosensitive material 22 can be smoothly transported without causing a speed difference between the transport unit 6 and the roller pairs 24 and 26.

[0006]

By the way, in the image recording apparatus 2, in order to cut the photosensitive material 22 into a predetermined length, the front end portion of the photosensitive material 22 is held by the conveying section 6. The photosensitive material 22 is sent out to the side of the carrying section 6 by a predetermined amount. Therefore, the photosensitive material 22 forms a loop between the roller pair 16 and the transport unit 6,
Due to the resilience of the photosensitive material 22 itself, the size of the loop, etc., the photosensitive material 22 tries to move from between the driving roller 8 and the nip roller 10 to the automatic developing device 4 side. Here, the drive roller 8 is engaged with the rotary drive source 12 via the clutch 14, and is rotatable relative to the clutch 14 in the arrow A direction. Therefore, the drive roller 8 may be easily rotated in the direction of arrow A, and the leading end of the photosensitive material 22 may press the shutter 18 and enter the automatic developing device 4 through the opening 20. As a result, gas or the like enters the image recording device 2 from the automatic developing device 4, and the photosensitive material 22 is nipped by the pair of rollers 24 and 26 and pulled into the automatic developing device 4.
May be damaged, jams may occur, and the transport unit 6 may malfunction. Further, in order to prevent the malfunction of the shutter 18, the tip position of the photosensitive material 22 is detected before the shutter 18 is driven, but the tip is likely to be displaced from the regular position, which may cause an error. Therefore, it is necessary to remove the photosensitive material 22, which is uneconomical.

A shutter 28 having a structure different from that of the swingable shutter 18 is shown in FIG. The shutter 28 includes a plate body 32 that can open and close the opening 30.
The plate 32 is held at a position where it closes the opening 30 via a spring 34, and is biased downward under the action of an actuator (not shown) to open the opening 30. However, in the shutter 28 having such a structure, there is a problem in that the shutter 28 is not opened at the tip of the photosensitive material 22, but is pressed by the photosensitive material 22 and cannot be opened smoothly.

The present invention is intended to solve this type of problem, and is capable of smoothly transporting a long sheet-like object to be conveyed, and in the state where the object to be conveyed is formed into a loop. An object of the present invention is to provide a transfer device provided with a stop mechanism that can be surely held.

[0009]

In order to achieve the above-mentioned object, the present invention conveys a long sheet-like object to be conveyed and a stop for forming the loop and holding the object to be conveyed. A transport device having a mechanism, for transporting the transport target by being driven by a drive roller that is rotationally driven via a rotary drive source and the outer peripheral surface of the drive roller and being rotated by the drive roller. Of the nip roller, the first driving force transmitting means and the second driving force transmitting means provided on the rotary shaft of the rotary driving source, and the first driving force transmitting means are engaged with each other under the action of the rotary driving source. A first clutch for conveyance that transmits only the rotational force in the conveying direction to the driving roller, and a second driving force transmission means that engages and rotates at a higher speed than the first clutch when the rotational drive source is driven. Rotate relative to the drive roller On the other hand, characterized in that it comprises a second clutch for stopping to prevent that the drive roller in a state where driving of the rotary driving source is stopped is rotated in the conveying direction.

The first driving force transmitting means and the second driving force transmitting means
The driving force transmission means includes a first gear and a second gear that are fixed to a rotation shaft of the rotary drive source and mesh with the first clutch and the second clutch, and when the rotary drive source is driven, the second gear is driven. Gears of the first gear and the first clutch such that the rotation speed of the clutch is higher than the rotation speed of the first clutch and the second clutch rotates relative to the drive roller in the transport direction. It is preferable that the ratio is set to be larger than the gear ratio of the second gear and the second clutch.

Furthermore, when the rotary drive source is driven, the rotational speed V1 of the first clutch and the rotational speed V2 of the second clutch are arranged in front of the drive roller in the conveying direction. Speed V of the roller
It is preferable to have a relationship of V1 <V3 <V2 with respect to 3.

[0012]

In the carrying device equipped with the stop mechanism according to the present invention,
First and second drive force transmitting means under the action of the rotary drive source,
For example, when the first and second clutches rotate via the first and second gears, the drive roller rotates in the transport direction via the first clutch. Here, since the rotation speed of the second clutch is higher than the rotation speed of the first clutch, the second clutch rotates faster than the drive roller and idles relative to the drive roller in the transport direction. It does not interfere with the rotation of the drive roller. On the other hand, when the drive of the rotary drive source is stopped, the drive roller is prevented from rotating in the conveying direction by the second clutch, and the tip end side is held between the drive roller and the nip roller. Even if the transport body tries to move to the downstream side by forming a loop, the leading end portion is not reliably held by the drive roller and the nip roller under the action of the second clutch.

Further, the feed speed of the drive roller is different from the feed speed of the roller arranged in front of the drive roller in the conveying direction, and the rotation speed V1 of the first clutch and the second speed
The clutch rotation speed V2 and the roller rotation speed V3 have a relationship of V1 <V3 <V2. For this reason,
When the transported body is transported by the rollers, the drive roller idles relative to the first clutch in the transport direction,
The drive roller idles relative to the second clutch in the counter-transport direction. Therefore, the transported object is smoothly transported through the rollers without being blocked by the driving roller.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A carrying device having a stop mechanism according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to an embodiment in relation to an image recording device incorporating the same.

In FIG. 1, reference numeral 40 indicates an image recording apparatus incorporating the conveying apparatus according to this embodiment. A magazine 44 is provided in the upper part of a casing 42 that constitutes the image recording device 40, and a long unexposed film S (sheet-shaped transported object) wound in a roll shape is provided in the magazine 44. It is stored.

A transport mechanism 46 is arranged below the magazine 44. The transport mechanism 46 includes a large-diameter drive drum 50 that is rotationally driven by a rotary drive source 48, and nip rollers 52a and 52b slidably contacting the drive drum 50 via an elastic body (not shown).
a and 52b are configured to be movable back and forth with respect to the drive drum 50. A laser beam L, which is derived from a light beam scanning unit (not shown) and is used to record image information on the film S, is horizontally applied between the nip rollers 52a and 52b.

Below the transport mechanism 46, a pair of transport rollers 5 is provided.
4, 56 are arranged apart from each other by a predetermined distance, and each of the rollers 5 constituting the conveying roller pair 54, 56 is arranged.
4a and 56a can move back and forth with respect to the other rollers 54b and 56b. A cutting means 58 including a pair of cutter blades is provided between the pair of transport rollers 54 and 56.

A carrying device 60 according to the present embodiment is disposed downstream of the carrying roller pair 56 in the carrying direction. As shown in FIG. 2, the transfer device 60 includes a motor (rotational drive source) 62.
A drive roller 64 which is rotationally driven through the drive roller 64, a nip roller 66 which is pressed against the outer peripheral surface of the drive roller 64 by a leaf spring or the like, and which conveys the film S under the rotating action of the drive roller 64, and the motor 62. A first gear (driving force transmitting means) 70 and a second gear (driving force transmitting means) 72 fixed to a rotary shaft 68 of the driving roller, and the driving roller under the action of the motor 62. The first clutch for conveyance 74 that transmits only the rotational force in the conveyance direction (direction of arrow X) to 64 and the second gear 72 meshes with the driving roller 64 in the conveyance direction when the motor 62 is driven. No rotation force is transmitted, while the motor 62
Second clutch 76 for stopping that the drive roller 64 is prevented from rotating in the conveying direction while the drive of the drive roller is stopped.
With.

As shown in FIG. 3, the first and second clutches 74 and 76 have an outer ring 78 and a structure 80, and the outer ring 78 has a gear portion 82a which meshes with the first and second gears 70 and 72. , 82b are provided. The structure 80 accommodates the roller receiving wheel 84 arranged in the outer ring 78 and the needle roller 88 which is in sliding contact with the locking surface 86 formed on the inner surface of the roller receiving wheel 84, and the shaft of the drive roller 64. And a holding member 90 into which 64a is inserted.

When the outer ring 78 is rotated in the direction of arrow Y in FIG. 3 with the shaft 64a inserted into the holding member 90,
The needle roller 88 is pressed against the locking surface 86 so that the shaft 6
4a is locked, and the outer ring 78 and the drive roller 64 integrally rotate in the arrow Y direction. This outer ring 78 is the arrow Z
When rotated in the direction (direction opposite to the arrow Y direction), the outer ring 78 rotates (that is, idles) separately from the shaft 64a.

The first clutch 74 is mounted on the shaft 64a of the drive roller 64 so that the direction of the arrow Y, which is the lock direction thereof, coincides with the conveying direction of the drive roller 64 (the direction of the arrow X). On the other hand, the second clutch 76 is the first clutch 74.
In order to have a lock direction in the opposite direction, the arrow Z direction which is the idling direction is made to coincide with the arrow X direction which is the conveyance direction of the drive roller 64 and is mounted on the shaft 64a of the drive roller 64.

The gear ratio between the first gear 70 and the first clutch 74 is set to be larger than the gear ratio between the second gear 72 and the second clutch 76, so that when the motor 62 is driven, the second clutch The rotation speed of the second clutch 7 becomes higher than that of the first clutch 74.
6 rotates (idle) relative to the drive roller 64 in the transport direction (arrow X direction).

A sensor 91 for detecting the leading edge of the film is provided in the vicinity of the transport device 60. The sensor 91 is, for example, an optical sensor including a light projector and a light receiver.
A shutter 92 is swingably arranged near the sensor 91, and the image recording device 40 and the automatic developing device 9 are opened via an opening 94 opened and closed by the shutter 92.
6 communicates with. An opening 94 is provided in the automatic developing device 96.
A pair of conveying rollers 98 and 100 are arranged in the vicinity of.

The conveying speed by the pair of conveying rollers 98, 100 is set higher than the conveying speed by the conveying device 60, and the rotation speed V1 of the first clutch 74 and the rotation speed V2 of the second clutch 76 are The transport roller pair 9
V1 <V3 <V2 for rotation speed V3 of 8 and 100
Have a relationship.

Next, the operation of the image recording apparatus 40 thus constructed will be described with reference to the transporting apparatus 60 according to this embodiment.

First, the magazine 44 is stored in the upper part of the housing 42. This magazine 44 has a long film S
Is wound and stored in a roll shape, and its end portion is pulled out vertically downward and is sandwiched by the drive drum 50 and the nip rollers 52a and 52b that constitute the transport mechanism 46.
Then, the rotary drive source 48 is driven, and the film S is sent out by a predetermined length via the drive drum 50 and the nip rollers 52a and 52b (see FIG. 4).

Next, as shown in FIG. 5, the rotary drive source 4
8, the driving drum 50 is reversed, the light beam scanning unit (not shown) is driven while the film S is conveyed in the direction of arrow B (sub-scanning direction) at a predetermined speed, and the nip rollers 52a and 52b are separated from each other. The laser beam L is applied to the film S in the main scanning direction (direction substantially orthogonal to the sub scanning direction). As a result, the laser beam L is emitted from the film S.
On the other hand, a desired image is exposed and recorded.

After a predetermined recording operation is completed on the film S, the film S is fed downward by the rotation of the driving drum 50, and further, by the rotation of the pair of transport rollers 54 and 56, the transport device 60 side. Be transferred to. In the transport device 60, when the motor 62 is driven and the rotary shaft 68 rotates, the first clutch 74 and the second clutch 76 transport via the first gear 70 and the second gear 72 fixed to the rotary shaft 68. Rotate in the direction (direction of arrow X).

Since the lock direction of the first clutch 74 is set in the arrow X direction, the drive roller 64 rotates in the arrow X direction integrally with the first clutch 74. On the other hand, the second clutch 76 similarly rotates in the direction of the arrow X, but the gear ratio between the first gear 70 and the first clutch 74 is set to be larger than the gear ratio between the second gear 72 and the second clutch 76. ing. As a result, the second clutch 76
Becomes faster than the rotation speed of the first clutch 74, and the second clutch 76 rotates (idles) relative to the drive roller 64 in the transport direction (arrow X direction).

Therefore, the drive roller 64 smoothly moves to the arrow X.
The film S is nipped by the drive roller 64 and the nip roller 66, and is conveyed to the automatic developing device 96 side. When the front end of the film S is detected by the sensor 91, the driving of the motor 62 constituting the transport device 60 is stopped, so that the film S sent by the transport mechanism 46 and the transport roller pair 54, 56 is cut. A loop R is formed between the conveying roller pair 56 and the conveying device 60 in accordance with the length required for the sheet (FIG. 6).
reference).

In this case, the conveying roller pair 56 and the conveying device 6
The film S, which forms a loop R with 0 and is held, tends to move in the direction of arrow C in FIG. 6 due to its own resilience, the shape of this loop R, and the like. For this reason, a rotational force in the arrow X direction acts on the drive roller 64 that constitutes the transport device 60.

However, in this embodiment, the lock direction of the second clutch 76 fixed to the shaft 64a of the drive roller 64 is set to the opposite direction to the lock direction of the first clutch 74, and the drive roller 64 is The direction in which the drive roller 64 and the second clutch 76 are locked coincides with the direction in which the drive roller 64 and the second clutch 76 are locked. Therefore, the rotation of the drive roller 64 in the direction of the arrow X is caused by the second clutch 7
6, the motor S is surely blocked by the motor 62 via the second gear 72, the leading end of the film S is firmly held by the drive roller 64 and the nip roller 66, and the leading end of the film S moves in the direction of arrow C. The effect of being able to prevent this is obtained.

As a result, the leading end of the film S moves in the direction of arrow C to open the shutter 92, and gas or the like in the automatic developing device 96 is discharged from the opening 94 to the image recording device 4.
It is possible to avoid the possibility that the image recording device 40 is introduced into the zero position, the film S is damaged, the transport device 60 is broken, and the image recording device 40 itself is stopped due to an error signal. Further, when the shutter 28 as shown in FIG. 9 is used, the film S does not press the plate 32 to cause the open / close failure of the plate 32.

Next, the transport mechanism 46 and the transport roller pair 5
The driving of Nos. 4 and 56 is stopped, and only the conveying roller pair 54 is slightly reversed so that the conveying roller pairs 54 and 5 are
The film S is cut by the cutting means 58 composed of a pair of cutter blades in a state where tension is applied to the film S between the six. Thereafter, as shown in FIG. 7, the pre-recorded film S is returned in the direction of arrow B via the transport mechanism 46 and the transport roller pair 54, while the post-recorded film S is
By the drive roller 64 and the nip roller 66 which constitute the conveying device 60, the conveying roller pair 98, 100 of the automatic developing device 96 is introduced into the automatic developing device 96 from the opening 94 opened through the shutter 92. It is conveyed to a development processing section (not shown) and subjected to a predetermined development processing.

At this time, the film transport speed by the transport roller pair 98, 100 is set to be higher than the film transport speed by the transport device 60. Therefore, the film S after recording has the conveying device 60 and the conveying roller pairs 98, 10
When the film S is integrally conveyed in the direction of the arrow C by 0, the film S is transferred to the drive roller 64 which constitutes the conveying device 60.
A tensile force in the direction of arrow X acts via.

In this case, in this embodiment, the first clutch 7
Since the rotation speed V1 of No. 4 and the rotation speed V3 of the pair of conveyance rollers 98 and 100 have a relationship of V1 <V3, the drive roller 64 is in the conveyance direction (direction of arrow X) with respect to the first clutch 74. Rotate idle relative to. On the other hand, since the rotation speed V2 of the second clutch 76 and the rotation speed V3 of the pair of conveying rollers 98 and 100 have a relationship of V3 <V2, the drive roller 64 is opposite to the second clutch 76. Spins relatively in the direction. Therefore, the film S
Is not blocked by the drive roller 64, and is advantageously transported smoothly in the direction of arrow C at a predetermined transport speed via the transport roller pair 98, 100.

In this embodiment, the first and second gears 70 and 72 and the gear portions 82a and 82b meshing with the first and second gears 70 and 72 are used as the driving force transmitting means, but the present invention is not limited to this, and for example, It is possible to use rollers, belts, pulleys, etc. that slide with each other.

[0038]

According to the carrying device having the stopping mechanism of the present invention, the following effects and advantages can be obtained.

When the first and second clutches rotate under the action of the rotary drive source, the drive roller rotates in the conveying direction via the first clutch, and the second clutch moves in the conveying direction with respect to the driving roller. It relatively idles and does not interfere with the rotation of the drive roller. On the other hand, when the drive of the rotary drive source is stopped, the drive roller is prevented from rotating in the transport direction by the second clutch, and the tip portion is held between the drive roller and the nip roller. The to-be-conveyed body does not move its tip side toward the downstream side when forming a loop.

Even if the feed speed of the drive roller and the feed speed of the roller arranged in front of the drive roller in the conveying direction are different from each other, when the object to be conveyed is conveyed by the roller, the drive roller causes the first clutch to move. On the other hand, the drive roller idles relatively in the carrying direction, while the drive roller idles relatively in the counter carrying direction with respect to the second clutch. Therefore, the transported object is smoothly transported through the rollers without being blocked by the driving roller.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an image recording apparatus that incorporates a conveyance device having a stop mechanism according to the present invention.

FIG. 2 is a perspective view of a main part of the transfer device.

FIG. 3 is an explanatory front view of a clutch that constitutes the transport device.

FIG. 4 is an explanatory diagram when a film is sent out in the image recording apparatus.

FIG. 5 is an explanatory diagram when performing exposure recording on a film in the image recording apparatus.

FIG. 6 is an explanatory diagram when the film after exposure and recording is sent out according to the cutting length in the image recording apparatus.

FIG. 7 is an explanatory diagram after the film is cut in the image recording apparatus.

FIG. 8 is a schematic explanatory view of a conventional transfer device.

FIG. 9 is a schematic side view illustrating the configuration of another conventional shutter.

[Explanation of symbols]

40 ... Image recording device 42 ... Housing 44 ... Magazine 46 ... Conveyance mechanism 50 ... Driving drums 52a, 52b
... Nip rollers 54, 56 ... Conveying roller pair 58 ... Cutting means 60 ... Conveying device 62 ... Motor 64 ... Driving roller 66 ... Nip rollers 70, 72 ... Gears 74, 76 ... Clutch 91 ... Sensor 92 ... Shutter 94 ... Opening 96 ... Automatic Developing device 98, 100 ... Conveying roller pair

Claims (3)

[Claims] 1. A transport device comprising a stop mechanism for transporting a long sheet-shaped transported object and holding the transported object in a loop, wherein the transport device rotates via a rotary drive source. A driving roller that is driven, a nip roller that is pressed against the outer peripheral surface of the driving roller and that conveys the transported object under the rotating action of the driving roller, and a first drive that is provided on a rotation shaft of the rotation driving source. A first clutch for conveyance, which engages with the force transmission means and the second driving force transmission means, and the first driving force transmission means, and transmits only the rotational force in the conveying direction to the drive roller under the action of the rotational drive source. Engaging with the second drive force transmitting means, rotating at a higher speed than the first clutch when the rotary drive source is driven, and rotating relatively to the drive roller, while the rotary drive source Drive with the drive stopped Feeder roller is provided with a stop mechanism, characterized in that it comprises a second clutch for stopping to prevent being rotated in the conveying direction. 2. The conveying apparatus according to claim 1, wherein the first driving force transmitting means and the second driving force transmitting means are fixed to a rotary shaft of the rotary drive source and mesh with the first clutch and the second clutch. When the rotary drive source is driven, the rotation speed of the second clutch is higher than the rotation speed of the first clutch, and the second clutch functions as the drive roller. The gear ratio between the first gear and the first clutch is set to be larger than the gear ratio between the second gear and the second clutch so that the gear ratio relatively rotates in the transport direction. Conveyor device with stop mechanism. 3. The conveying device according to claim 1, wherein when the rotational drive source is driven, the rotational speed V1 of the first clutch and the rotational speed V2 of the second clutch are the same as those of the drive roller. With respect to the rotation speed V3 of the rollers that constitute the conveyance system arranged in the front in the conveyance direction, V1 <
A transport device having a stop mechanism, which has a relationship of V3 <V2.