JP3289028B2 - Transfer material transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved guide portion which is used in a copying machine, a printer, a printing machine or the like and which is located at least in a part of a transfer material conveying path and guides the transfer material in a curved manner. An upstream conveying means arranged on the upstream side of the curved guide section and a downstream arranged on the downstream side of the curved guide section for conveying the transfer material at a conveying speed higher than the conveying speed of the transfer material of the upstream conveying means; And a side transfer unit.

[0002]

2. Description of the Related Art As a transfer material transporting device used in a conventional copying machine, printer, printing machine and the like, there has been a transfer material transporting device configured as shown in FIG. In such a transfer material conveyance device, a vibration damping member is disposed between a conveyance roller and a paper feed roller, and when a transfer paper as a transfer material is stretched during a paper feeding operation, the surface of the transfer paper is damped. The transfer paper abuts on the member and absorbs the vibration noise of the transfer paper generated when the transfer paper comes into contact with the conveyance path.

In this transfer paper transporting apparatus, a paper feed roller 32 for separating transfer papers P stacked on a paper feed table 31 one by one and sending them forward, and a paper feed roller 32 at a predetermined interval. The transport rollers 33 arranged, guide plates 34a and 34b for guiding the transfer paper P, and guide plates 34a and 3
The elastic body 35 is a structure in which the surface of a foam 35a such as a sponge is covered with a hard rubber 35b.

In the transfer paper transporting device having such a structure, first, the transfer paper P1 sent out from the paper supply table 31 by the rotation of the paper supply roller 32 passes between the guide plates 34a and 34b, and the leading end thereof. It is received between the transport rollers 33.
When the transfer paper P1 is slackened between the paper feed roller 32 and the transport roller 33, the paper feed roller 32 stops rotating, the transport roller 33 starts rotating, and the transfer paper P1 starts rotating. The transfer paper P1 is conveyed to the next step while stretching the slack.

At this time, the transfer paper P1 changes abruptly from the state shown by the solid line to the state shown by the broken line. During this change, the surface of the transfer paper P1 comes into contact with the elastic body 35, and the foam 35a is elastically deformed. By doing so, the vibration of the transfer paper P1 is absorbed and the generation of noise is suppressed.

[0006]

In the transfer material transporting apparatus having the above-described structure, when the looseness of the transfer material P1 is rapidly eliminated, the surface of the transfer material P1 comes into contact with the elastic body 35, and the foam 3
Due to the elastic deformation of 5a, the vibration of the transfer material P1 is absorbed and the generation of noise is suppressed. Next, the transfer material P1 is conveyed while being in contact with the hard rubber 35b, that is, while compressing the foam 35a. At this time, a frictional force is generated between the transfer material P1 and the hard rubber 35b, and the hard rubber 35b is dragged downstream in the transport direction of the transfer material P1, and the foam 35
"Shear stress" is applied to b. By repeating this, the foam 35b deforms and protrudes to the downstream side in the transport direction, and may damage the transfer material P1 such as dents.

In view of the above-mentioned problems, the transfer material conveying apparatus of the present invention reduces the tension applied to the transfer material, thereby reducing the force at the time of contact of the transfer material with the elastic body. It is intended to prevent damage such as streaks and dents.

[0008]

According to the present invention, there is provided a transfer material conveying apparatus, comprising: a curved guide portion which is positioned at least in a part of a transfer material conveying path and guides the transfer material in a curved manner; Upstream transport means disposed on the upstream side, and downstream transport means disposed on the transport downstream side of the curved guide portion and transporting the transfer material at a transport speed higher than the transport speed of the transfer material of the upstream transport means, An elastic body disposed at a portion where the transfer material comes into contact when a transfer force is applied to the transfer material by the upstream transfer means and the downstream transfer means of the curved guide portion, and inside the elastic body a pressure sensor is provided, the pressure Ri tension Kuwawa by the transfer of the downstream transport means to the transfer material
When the force sensor detects the impact of the transfer material,
There is provided a tension reducing means for releasing the pressure contact of the means to the transfer material and reducing the tension applied to the transfer material.

[0009]

[0010]

[0011]

[0012]

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a transfer material transporting apparatus according to the present invention will be described below with reference to the drawings. In the following description , a copying apparatus will be described as an example of a transfer material transporting apparatus, but the present invention is not limited to such an apparatus. In other words, the present invention can be applied to all devices having a transfer path for transferring the transfer material and a mechanism for transferring the transfer material by rollers, and in particular, to all transfer material transfer devices having transfer material transfer means at two or more locations on the transfer path .

FIG. 1 is a side sectional view of a transfer material conveying device according to a first application example of the present invention.

In FIG. 1, a transfer material P sandwiched between an upstream transport roller 1a driven by a drive source and an upstream transport roller 1b driven by the upstream transport roller 1a is provided with a transport guide (an inner curved guide section). 3) The downstream transport roller 2a that travels along the transport guides 3b and 3c in the transport path formed by the transport guides 3b and 3c, and is driven by the driving source to rotate at a higher speed than the upstream transport roller 1a. And the downstream side transport roller 2b. Downstream transport roller 2
a has a higher peripheral speed than the upstream transport roller 1a, the transfer material P nipped by both the upstream transport roller 1 and the downstream transport roller 2 is transferred to the downstream transport roller 2a.
Quickly changes from the state P1 that has begun to be pinched to the state of P2. At this time, the transfer material P collides with the elastic body 4 attached to the transfer material passing side of the transport guide 3a.

The distance between the upstream transport roller 1 and the downstream transport roller 2 is set to be shorter than the length of the shortest transfer material passing through the transport path. Therefore, even after the transfer material P collides with the elastic body 4, the transfer material P is nipped for a while between both the upstream transport roller 1 and the downstream transport roller 2, and the difference between the two peripheral velocities described above. Therefore, the transfer material P is conveyed to the downstream side while compressing the elastic body 4 in the state of P2.

The upstream transport roller 1a and the downstream transport roller 2a have a drive shaft 5 to which a driving force from a drive source is transmitted.
Are provided. The upstream transport roller 1b and the downstream transport roller 2 b is also a plurality provided in the driven shaft 6.

The upstream transport roller 1a and the downstream transport roller 2a are formed by winding an easily deformable elastic body 7 such as a sponge around the drive shaft 5 and transferring the outer periphery of the easily deformable elastic body 7 with rubber or the like to be transferred. The material P is formed by being covered with a cover 8 made of a non-slip material.
The coating 8 constitutes a tension reducing means. The upstream transport roller 1 and the downstream transport roller 2 may be configured such that all of the rollers on the drive side and the driven side are formed as described above, or some of the rollers provided on the drive shaft 5. The rollers may be formed as described above. Then, instead of both the upstream and downstream rollers, only the upstream rollers may be formed as described above.

In the transfer material transport apparatus having the above-described structure, the transfer material P is transported by the upstream transport roller 1, and thereafter,
When the leading end of the transfer material P is nipped by the downstream-side transport roller 2 and the transport force of the downstream-side transport roller 2 is transmitted, the transfer material P is changed from the state of P1 shown by a solid line in FIG. When tension is applied to the transfer material P by abutting against the elastic body 4, a force is also applied to the upstream transport roller 1 a, and the elastic body 7 of the upstream transport roller 1 a is easily deformed, and the upstream transport roller 1 a is deformed. As a result, the driving force applied to the transfer material P is reduced.

As a result, the tension applied to the transfer material P is reduced, and the generation of impact noise when the transfer material P comes into contact with the elastic body 4 is reduced and suppressed. Moreover, even when the transfer of the transfer material P is repeated, the force applied to the elastic body 4 is reduced, so that the elastic body 4 does not deform and protrude into the transfer path and damages the transfer material P such as streaks and dents. There is no.

Next, an application example 2 of the present invention will be described with reference to FIGS. 5 and 6. An upstream transport roller 1a is rotatably mounted on a drive shaft 5, and a friction plate 9a is attached to the upstream transport roller 1a. A friction plate 9b for mounting and rotating the drive shaft 5 by contacting the friction plate 9a and transmitting the driving force of the drive shaft 5 to the upstream conveying roller 1a is provided slidably with respect to the drive shaft 5; The spring 10 is attached to the mounting plate 11 for urging the spring 10 in a direction to always contact the friction plate 9a.

A transmission pin 12 for transmitting a rotational driving force to the friction plate 9b is provided on the drive shaft 5, and an engagement groove 13 for engaging with the transmission pin 12 is provided on the friction plate 9b. The friction plates 9a and 9b, the spring 10, the mounting plate 11, and the transmission pin 1
2. The engagement groove 13 constitutes a tension reducing means.

Reference numeral 13 denotes a regulating plate for regulating the sliding range of the upstream conveying roller 1a in the axial direction.

In the transfer material transport apparatus having the above-described structure, the transfer material P is transported by the upstream transport roller 1, and thereafter,
When the leading end of the transfer material P is nipped by the downstream-side transport roller 2 and the transport force of the downstream-side transport roller 2 is transmitted, the transfer material P is changed from the state of P1 shown by a solid line in FIG. When the transfer material P is abutted against the elastic body 4 and tension is applied to the transfer material P, a force is also applied to the upstream transport roller 1a, so that the friction plate 9a and the friction plate 9b of the upstream transport roller 1a slide and the drive shaft 5 is not transmitted to the upstream transport roller 1a, and the drive force applied to the transfer material P from the upstream transport roller 1a is reduced.

As a result, the tension applied to the transfer material P is reduced, and the generation of impact noise when the transfer material P comes into contact with the elastic body 4 is reduced. Moreover, even when the transfer of the transfer material P is repeated, the force applied to the elastic body 4 is reduced, so that the elastic body 4 does not deform and protrude into the transfer path and damages the transfer material P such as streaks and dents. There is no.

In the application example 2, the upstream transport roller 1
Although a has been described, the upstream transport roller 1b and the downstream transport roller 2 may have the same configuration as the upstream transport roller 1a.

Referring to FIG. 7, an application example 3 of the present invention will be described. A drive shaft 5 to which an upstream transport roller 1a is attached and a torque limiter 14 as tension reducing means are provided on the drive source side. The torque limiter 14 has a friction plate 15a provided on the roller side of the drive shaft 5, a friction plate 15b provided on the drive source side of the drive shaft 5, and a direction in which the friction plate 15b is always in contact with the friction plate 15a. It comprises a spring 16 to be urged and a mounting plate 17 to which the spring 16 is attached.

In the transfer material transporting apparatus having the above-described structure, the transfer material P is transported by the upstream transport roller 1, and thereafter,
When the leading end of the transfer material P is nipped by the downstream-side transport roller 2 and the transport force of the downstream-side transport roller 2 is transmitted, the transfer material P is changed from the state of P1 shown by a solid line in FIG. When tension is applied to the transfer material P by abutting against the elastic body 4, a force is also applied to the upstream transport roller 1 a, so that the friction plates 15 a and 15 b of the drive shaft 5 of the upstream transport roller 1 a are moved. It absorbs the shock generated when the transfer material P collides with the elastic body 4 due to slippage.

As a result, the tension applied to the transfer material P is reduced, and the generation of impact noise when the transfer material P comes into contact with the elastic body 4 is reduced and suppressed. Moreover, even when the transfer of the transfer material P is repeated, the force applied to the elastic body 4 is reduced, so that the elastic body 4 does not deform and protrude into the transfer path and damages the transfer material P such as streaks and dents. There is no.

In the above-mentioned application example 3, the upstream conveying roller 1
a, the upstream-side transport roller 1
The driven shaft 6 and the drive shaft 5 and the driven shaft 6 of the downstream transport roller 2 may have the same configuration as the drive shaft 5.

Referring to FIG. 8, an application example 4 of the present invention will be described. An elastic body 18 serving as a buffer material of a tension reducing means is provided between a roller side of a drive shaft 5 to which an upstream conveying roller 1a is attached and a drive source side. When the transfer material P is transported by the upstream transport roller 1 and then the leading end of the transfer material P is nipped by the downstream transport roller 2 and the transport force of the downstream transport roller 2 is transmitted, the transfer is performed. The material P changes from the state of P1 shown by the solid line in FIG. 1 to the state of P2 shown by the broken line. When tension is applied to the transfer material P by abutting against the elastic member 4, a force is also applied to the upstream side transport roller 1a. The impact generated when the transfer material P collides with the elastic body 4 due to the torsional deformation of the elastic body 18 of the drive shaft 5 of the upstream side transport roller 1a is absorbed.

As a result, the tension applied to the transfer material P is reduced, and the generation of impact noise when the transfer material P comes into contact with the elastic body 4 is reduced. Moreover, even when the transfer of the transfer material P is repeated, the force applied to the elastic body 4 is reduced, so that the elastic body 4 does not deform and protrude into the transfer path and damages the transfer material P such as streaks and dents. There is no.

In the above application example 4, the upstream transport roller 1
a, the upstream-side transport roller 1
The driven shaft 6 and the drive shaft 5 and the driven shaft 6 of the downstream transport roller 2 may have the same configuration as the drive shaft 5.

Referring to FIG. 9, a first embodiment of the present invention will be described.
Movably provided in the up-down direction (the direction in which the upstream-side transport roller 1a and the upstream-side transport roller 1b come into contact with and separate from each other).
Is rotatably supported by a rotation shaft 20 and a solenoid 21 for driving the arm 19 is provided. Further, a pressure sensor 22 is provided inside the elastic body 4 of the inner curved guide portion 3a.

The arm 19, the solenoid 21, and the pressure sensor 22 constitute a tension reducing means. Reference numeral 23 designates the arm 1 so that the drive shaft 5 is positioned upward (in a direction in which the upstream transport roller 1a and the upstream transport roller 1b come into contact with each other).
9 is a spring that constantly biases the spring 9.

In the transfer material transport apparatus having the above-described structure, the transfer material P is transported by the upstream transport roller 1, and thereafter,
When the leading end of the transfer material P is nipped by the downstream-side transport roller 2 and the transport force of the downstream-side transport roller 2 is transmitted, the transfer material P changes from the state of P1 shown by a solid line in FIG. And when it comes into contact with the elastic body 4, the pressure sensor 2
2, the solenoid 21 is operated, the arm 19 is rotated and driven, and the drive shaft 5 is moved downward in the figure (upstream transport roller 1).
a and the upstream transport roller 1b are moved away from each other) to release the tension applied to the transfer material P being transported.

As a result, the frictional force between the transfer material P and the elastic body 4 is reduced, the force applied to the elastic body 4 is reduced, and the elastic body 4 is prevented from being deformed and protruded into the transport path. No damage such as streaks or dents is caused.

A second embodiment of the present invention will be described with reference to FIGS. 10 and 11. A drive shaft releasing means for transmitting / releasing a driving force of a driving source is provided on a driving shaft 5 of an upstream conveying roller 1a. The pressure sensor 22 is provided inside the elastic body 4 of the inner curved guide portion 3a.

In the transfer material transport apparatus having the above-described structure, the transfer material P is transported by the upstream transport roller 1, and thereafter,
When the leading end of the transfer material P is nipped by the downstream-side transport roller 2 and the transport force of the downstream-side transport roller 2 is transmitted, the transfer material P is changed from the state of P1 shown by the solid line in FIG.
When the elastic member 4 comes into contact with the elastic member 4, the pressure sensor 22 detects this, and operates the clutch 24 to release the transmission of the driving force of the driving source to the driving shaft 5. Release the tension applied to P.

As a result, the frictional force between the transfer material P and the elastic body 4 is reduced, the force applied to the elastic body 4 is reduced, and the elastic body 4 is prevented from being deformed and protruded into the transport path. No damage such as streaks or dents is caused.

[0041]

According to the first aspect of the present invention, since the transfer material transporting device has the above-described configuration, the transfer material of the upstream transporting means can be transferred to the transfer material.
To reduce the tension applied to the transfer material
To prevent the generation of frictional force between the transfer material and the elastic
Deformation of the elastic body into the transport path by reducing the force applied to the elastic body
Can be reliably prevented, and the transfer material and
It is possible to reliably prevent the generation of noise due to friction with sexual bodies
it can.

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an application example 1 of a transfer material transporting apparatus of the present invention.

FIG. 2 is a plan view showing an upstream-side transport roller of FIG. 1;

FIG. 3 is a front vertical cross-sectional view of an upstream-side transport roller of FIG. 1;

FIG. 4 is a side longitudinal sectional view of the upstream side transport roller of FIG. 1;

FIG. 5 is a front sectional view of an upstream transport roller of a second application example of the transfer material transport apparatus of the present invention.

FIG. 6 is a side cross-sectional view of an upstream transport roller of a second application example of the transfer material transport apparatus of the present invention.

FIG. 7 is a plan view showing an upstream side transport roller of a third application example of the transfer material transport apparatus of the present invention.

FIG. 8 is a front sectional view showing a main part of a fourth application example of the transfer material conveying device according to the invention.

FIG. 9 is a side sectional view showing Embodiment 1 of the transfer material transporting apparatus of the present invention.

FIG. 10 is a side sectional view showing Embodiment 2 of the transfer material transporting apparatus of the present invention.

FIG. 11 is a plan view showing an upstream-side transport roller of FIG. 10;

FIG. 12 is a side sectional view showing an example of a conventional transfer material transport device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upstream conveyance roller 2 Downstream conveyance roller 3a Inside curved guide part 4 Elastic body 5 Drive shaft 6 Follower shaft 7 Easily deformable elastic body 8 Coating body 9 Friction plate 12 Transmission pin 13 Engagement groove 14 Torque limiter 18 Elastic body 19 Arm 21 Solenoid 22 Pressure sensor 24 Clutch

Continued on the front page (72) Inventor Shigeru Watayo 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Jun Morimoto 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Sharp Corporation ( 72) Inventor Heicho Yamamoto 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (56) References JP-A-6-336350 (JP, A) JP-A-57-85737 (JP, A) JP-A-3-23150 (JP, A) JP-A-2-292076 (JP, A) JP-A-63-189341 (JP, A) JP-A-69-194830 (JP, U) JP-A-2-103041 ( JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 5/06 B65H 5/36

Claims (1)

(57) [Claims] 1. A curved guide portion which is positioned at least in a part of a transfer material transport path and guides the transfer material in a curved manner, an upstream transport means disposed on the transport upstream side of the curved guide portion, and the curved portion. A downstream transport unit that is arranged downstream of the guide unit and transports the transfer material at a transport speed higher than the transport speed of the transfer material of the upstream transport unit; and the upstream transport unit and the downstream of the curved guide unit. An elastic body disposed at a portion where the transfer material comes into contact with the transfer material when a transfer force is applied to the transfer material by the side transfer means, wherein a pressure sensor is provided inside the elastic body; the tension by the transfer of the downstream transport means timber is pressurized <br/> I Ri the pressure sensor detects the衝圧of the transfer material, the
A transfer material transporting device comprising a tension reducing means for releasing the pressure contact of the upstream transporting means to the transfer material and reducing the tension applied to the transfer material.