CN211812473U

CN211812473U - Paper separating mechanism

Info

Publication number: CN211812473U
Application number: CN202020250280.2U
Authority: CN
Inventors: 廖文庆
Original assignee: Foxlink Image Technology Co Ltd
Current assignee: Foxlink Image Technology Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-10-30
Anticipated expiration: 2030-03-04

Abstract

The utility model discloses a paper separating mechanism, which comprises a paper separating roller group, a paper separating roller, a torsion limiter connected with the paper separating roller, and a coaxial paper separating gear arranged between the paper separating roller and the torsion limiter; the transmission gear set comprises a plurality of transmission gears, wherein two transmission gears are connected through a connecting part, and one transmission gear on the connecting part is connected with the paper separating gear; and the motor is connected with the transmission gear set and used for providing torque force for forward rotation or reverse rotation of the transmission gear, and when the motor rotates forwards or reversely, the connecting part is driven by the transmission gear to rotate forwards or reversely, so that the paper separating gear connected with the paper separating roller and the transmission gear can be switched in a connecting or separating state. Therefore, the mechanism can be operated by the principle of a passive type separating wheel under the general condition, when multi-feeding occurs, stronger separating tension of the separating wheel can be provided by the motor, and only fixed separating tension can be provided without being limited by a torsion limiter.

Description

Paper separating mechanism

Technical Field

The utility model relates to a paper separating mechanism especially relates to one kind and can have the paper separating mechanism who stabilizes the paper separating effect when the sola or many paper feeds.

Background

In the known paper separating mechanism, a separating roller is matched with a torque limiter to provide a separating tension for the separating roller. The partial tension is the radius of the partial tension wheel divided by the rotating torque of the torque limiter, and the multiple paper sheets can be separated through the partial tension which is larger than the adhesive force between the paper sheets.

The sheet separating roller in the known sheet separating mechanism is designed in two modes of a passive sheet separating roller and an active sheet separating roller. Referring to fig. 4, in the design of the passive type separating roller, a torsion limiter 111 ' is disposed on the separating roller 11 ', and no additional torsion is applied to the separating roller 11 ' to rotate against the paper, however, if the separating tension of the passive type separating roller 11 ' is to be increased, the torsion of the torsion limiter needs to be increased, which easily causes the problem of uneven wear due to the irregular rotation of the separating roller 11 '.

Referring to fig. 5, in the design of the active type separating roller, the torque limiter 111 'is driven by the transmission system 2' to drive the separating roller 11 'to rotate in the opposite direction to the moving direction of the paper, since the separating roller 11' can actively rotate, the situation that only the same position is worn away during the separation of the paper can be avoided, and in the case of multi-feeding paper, the multi-feeding paper is transported in the opposite direction to the moving direction by rotating, which is more helpful for the separating effect. However, the separation roller is opposite to the feeding direction, so the front edge of the paper is easy to be folded.

Therefore, there is a need for a separation roller that provides a greater separation force without causing a reverse fold in the leading edge of the sheet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a paper separating mechanism provides the tensile structure of bigger branch when many paper feed.

In order to achieve the purpose, the utility model discloses a paper separating mechanism, which comprises a paper separating roller group, a paper separating roller, a torsion limiter, a coaxial paper separating gear and a paper separating gear, wherein the paper separating roller group is provided with the paper separating roller; the transmission gear set comprises a plurality of transmission gears, wherein two transmission gears are connected through a connecting part, and one of the transmission gears on the connecting part is connected with the paper separating gear; and the motor is connected with the transmission gear set and used for providing forward or reverse torque force, when the motor rotates forwards or reversely, the connecting part is driven by the transmission gear to rotate forwards or reversely, and the transmission gear connected with the paper separating roller can be switched in a connecting or separating state.

As a further improvement, the transmission gear set comprises a first transmission gear connected with the motor, a second transmission gear meshed with the first transmission gear, a third transmission gear meshed with the second transmission gear, a fourth transmission gear meshed with the third transmission gear, and a fifth transmission gear meshed with the fourth transmission gear, wherein the fifth transmission gear is meshed with the paper separating gear so as to drive the paper separating roller to rotate, and the fourth transmission gear and the fifth transmission gear are connected through a connecting part.

As described above, the rotation of the transmission gear set drives the connection portion to rotate, so that the transmission gear on the connection portion can switch the connection or separation state with the paper separation roller, and thus, the mechanism can be operated according to the principle of a passive paper separation roller under a general condition, when multi-feeding occurs, a stronger paper separation roller can be provided by the motor, and only a fixed paper separation roller can be provided without being limited by a torque limiter.

Drawings

Fig. 1 is a perspective view of the paper separating mechanism of the present invention.

Fig. 2 is a perspective view of the paper separating mechanism of the present invention, in which the transmission gear is connected with the paper separating roller.

Fig. 3 is a perspective view of the paper separating mechanism of the present invention, in which the transmission gear is separated from the paper separating roller.

Fig. 4 is a perspective view of a passive type separating roller in the prior art.

Fig. 5 is a perspective view of an active type separating roller in the prior art.

Detailed Description

For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference is made to the following detailed description of the embodiments taken in conjunction with the accompanying drawings.

Referring to fig. 1 to 3, the paper separating mechanism 100 of the present invention is installed in an automatic paper feeder and can be used for separating different types of paper. The paper separating mechanism 100 includes a paper separating roller set 1, a transmission gear set 2 and a motor 3 for providing a rotation limiting torque. In this embodiment, the front side in fig. 1 is defined as the front side, and when the sheet separation mechanism 100 takes a sheet, the sheet enters from the rear end and is sent out from the front end.

The paper separating roller group 10 includes a paper separating roller 11 and a paper taking roller (not shown). A torsion limiter 111 is connected to the separating roller 11, and the torsion limiter 111 provides a rotation-limiting torsion to the separating roller 11. A coaxial paper separating gear 112 is arranged between the paper separating roller 11 and the torque limiter 111.

Referring to fig. 2 and 3, the transmission gear set 20 is connected to the motor 3, the transmission gear set 20 includes a plurality of transmission gears, two of the transmission gears are connected by a connecting portion 27, a transmission gear on the connecting portion 27 is connected to the paper separating gear 112, when the motor 3 rotates forward or backward, the connecting portion 27 is driven by the transmission gears to rotate forward or backward, so that the transmission gears connected to the paper separating roller 11 can be switched between a connection state and a separation state.

The transmission gear set 20 includes a first transmission gear 21 connected to the motor 3, a second transmission gear 22 engaged with the first transmission gear 21, a third transmission gear 23 engaged with the second transmission gear 22, a fourth transmission gear 24 engaged with the third transmission gear 23, and a fifth transmission gear 25 engaged with the fourth transmission gear 24. The fifth transmission gear 25 is meshed with the paper separating gear 112 so as to drive the paper separating roller 11 to rotate.

Referring to fig. 1 and 2, defining the rotation directions mentioned below with reference to the view angle of fig. 2, the fourth transmission gear 24 and the fifth transmission gear 25 are connected by a connecting portion 27. Because resistance exists between the connecting part 27 and the fifth transmission gear 25, when the motor 3 rotates counterclockwise, the first transmission gear 21, the second transmission gear 22, the third transmission gear 23, the fourth transmission gear 24 and the fifth transmission gear 25 which are meshed with each other are driven to rotate, at this time, the fourth transmission gear 24 rotates counterclockwise, and the resistance between the fifth transmission gear 25 and the connecting part 27 enables the connecting part 27 and the fourth transmission gear 24 to rotate counterclockwise, so that the fifth transmission gear 25 is meshed with the paper separating gear 112, and the paper separating roller 11 is driven to rotate.

Referring to fig. 1 and 3, the following rotation directions are defined based on the perspective of fig. 3, when the motor 11 rotates clockwise, the fourth transmission gear 24 rotates clockwise, and the resistance between the fifth transmission gear 25 and the connecting portion 27 causes the connecting portion 27 to rotate clockwise with the fourth transmission gear 24, so as to separate the fifth transmission gear 25 from the paper-separating gear 112, thereby preventing the transmission system 2 from causing additional resistance to the paper-separating roller 11.

In this embodiment, damping oil is coated between the fifth transmission gear 25 and the connecting portion 27 to increase the resistance between the fifth transmission gear 25 and the connecting portion 27, so that the fifth transmission gear 25 can drive the connecting portion 27 to rotate when rotating.

The utility model discloses paper separation mechanism 100 is arranged in separating many sheetings, and in the condition of general sola paper feed, drive gear group 20 and branch paper gear 112 become the separation state, and the system of separating this moment is passive form branch and takes turns the structure. In the case of multi-sheet feeding, the transmission gear set 20 drives the connecting portion 27 to connect with the paper separating gear 112 by the rotation of the motor 11, so that the paper separating gear 112 can directly provide a reverse rotation power for the paper separating roller 11 without a torque limiter, and thus can provide a larger torque (i.e. a larger separating tension) to separate the multiple sheets of paper without the limitation of the torque limiter.

Claims

1. The utility model provides a paper separating mechanism which characterized in that: the paper separating device comprises a paper separating roller group, a paper separating roller, a torsion limiter, a coaxial paper separating gear and a paper separating roller group, wherein the paper separating roller group is provided with the paper separating roller; the transmission gear set comprises a plurality of transmission gears, wherein two transmission gears are connected through a connecting part, and one of the transmission gears on the connecting part is connected with the paper separating gear; and the motor is connected with the transmission gear set and used for providing forward or reverse torque force, when the motor rotates forwards or reversely, the connecting part is driven by the transmission gear to rotate forwards or reversely, and the transmission gear connected with the paper separating roller can be switched in a connecting or separating state.

2. The paper separating mechanism of claim 1, wherein: the transmission gear set comprises a first transmission gear connected with the motor, a second transmission gear meshed with the first transmission gear, a third transmission gear meshed with the second transmission gear, a fourth transmission gear meshed with the third transmission gear and a fifth transmission gear meshed with the fourth transmission gear, the fifth transmission gear is meshed with the paper separating gear so as to drive the paper separating roller to rotate, and the fourth transmission gear and the fifth transmission gear are connected through a connecting part.