JP2911655B2 - Paper ejection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge mechanism.

[0002]

2. Description of the Related Art FIG. 7 shows a schematic configuration of a printer having a conventional paper discharge mechanism.

In FIG. 1, reference numeral 2 denotes a printing unit of the printer, which comprises a platen 3 and a print head 4 which are arranged to face each other. A guide member 5 for guiding a sheet is provided between the platen 3 and the print head 4.

Reference numeral 10A denotes a paper discharge mechanism, which comprises a discharge roller 11, a paper pressing member 15, a bail roller 16, a paper storage section, and the like.

Here, the discharge roller 11 is formed so as to be able to discharge the paper printed by the printing section 2 in cooperation with the bail roller 16 while being rotated in the direction of the arrow. This discharge roller 1
A paper storage unit (e.g., stock box 21) capable of storing paper is disposed downstream of the printer 1 in the paper transport direction.

Further, the discharge roller 11 and the sheet storage section (2)
1), the sheet is pressed to press the sheet storage section (2).
1) A paper pressing member 15 that can be guided to 1) is provided. The conventional paper pressing member 15 is formed of a thin plate-shaped elastic material, and is configured to press the paper using its own elastic force.

By the way, this thin sheet-shaped paper pressing member 1
No. 5 tends to have a curl, and may cause inconvenience that the sheet cannot be stably guided to the sheet storage section (21).

In order to stably store the paper in the paper storage portion (21), the present applicant attaches the base end 15a of the paper pressing member 15 to a stationary body (for example, as shown in FIGS. 8 and 9). There is proposed a paper discharge mechanism that is configured to be rotatably supported by the transparent cover 41) and to press the paper by utilizing the own weight (or the weight of the own weight and the added weight) of the pressing member 15 and the elastic force of the spring 19. ing.

[0009]

By the way, in the above-mentioned paper discharging mechanism utilizing the weight of the paper pressing member 15 or the like,
In order to stably press and guide the paper, the pressing member 1
5 itself must be made considerably large, and it may be difficult to further reduce the size and weight.

Further, in the sheet discharging mechanism utilizing the elastic force of the spring 19, the spring 19 must be incorporated between the sheet pressing member 15 and the stationary body (41) at the time of assembling. .

The object of the present invention is to reduce the size
An object of the present invention is to provide a paper discharge mechanism capable of stably storing discharged paper in a paper storage unit while reducing the weight and simplifying the assembly.

[0012]

According to the present invention, there is provided a discharge roller for discharging a sheet, a sheet storage portion disposed downstream of the discharge roller in the sheet conveyance direction and capable of storing the discharged sheet,
In a paper discharging mechanism including a paper pressing member capable of pressing a sheet between the discharge roller and the paper storing section to guide the sheet to the paper storing section, the paper pressing member includes a main body and a base end of the main body. And a rotating body provided on the stationary body via the rotating shaft so that the tip of the main body comes into contact with the discharge roller, and at least one of the main body and the rotating shaft is elastically deformable. Forming an engaging portion at a base end portion of the main body, wherein the elastic member engages with the engaging portion and rotates the elastic member against rotation of the main body in a direction away from the discharge roller. A stopper is provided for resisting the deformation permitting portion while elastically deforming the same and for urging the main body toward the discharge roller by using the elastic restoring force of the elastic deformation allowing portion.

[0013]

According to the present invention, the paper discharged from the discharge roller comes into contact with the main body of the paper pressing member and urges the main body in a direction away from the discharge roller.

Then, the stopper provided on the stationary body is
The elastically deformable portion is elastically deformed and resists the rotation of the main body in the direction away from the discharge roller by engaging with the engaging portion provided at the base end of the main body. Further, the stopper urges the main body toward the discharge roller by using the elastic restoring force of the elastic deformation allowing portion. Thus, the sheet is guided to the sheet storage unit while being pressed by the sheet pressing member with a constant force.

The amount of elastic deformation of the elastically deformable portion can be reduced by appropriately selecting the position of the stopper and the engaging portion, and the like. There is nothing to do.

As a result, the discharged paper can be stably stored in the paper storage section.

Here, when assembling the sheet discharging mechanism, the rotating shaft of the sheet pressing member need only be rotatably supported by the stationary body, so that the assembling can be easily performed. Further, since the paper is pressed by using the elastic restoring force of the elastic deformation permitting portion, it is not necessary to particularly increase the weight of the main body and to provide a spring. Thereby, the structure is simplified, and the size and weight can be easily reduced.

Accordingly, the discharged paper can be stably accommodated in the paper accommodating portion while reducing the size and weight and simplifying the assembly.

[0019]

An embodiment of the present invention will be described with reference to the drawings.

The paper discharge mechanism 10 according to the present embodiment is similar to the paper discharge mechanism shown in FIG.
As shown in FIG. 1, the present invention is applied to a printer having a printing unit 2 (platen 3, print head 4) and the like.
Paper storage unit (stock box 21), paper holding member 3
1, a stationary body (41) and a stopper 51 are configured.

The same components as those shown in FIGS. 8 and 9 are denoted by the same reference numerals, and description thereof will be omitted or simplified.

Here, a plurality of paper pressing members 31 are provided in the axial direction of the discharge roller 11 (a direction perpendicular to the paper surface in FIG. 1), and are provided on the main body 32 and the base end 33 of the main body 32. And the rotating shaft 35. The paper pressing member 31 is rotatably supported by a stationary body (the transparent cover 41 in the present embodiment) via a rotating shaft 35 so that the leading end portion 34 of the main body comes into contact with the discharge roller 11.

Further, at least one of the main body 32 of the paper pressing member 31 and the rotating shaft 35 is formed with an elastic deformation permitting portion 37 whose elastic deformation amount is larger than that of other parts as shown in FIG. I have. In this embodiment, the elastic deformation permitting portion 37 is formed by slightly constricting a portion of the rotating shaft 35 near the main body 32.

Further, an engaging portion 39 is provided at the base end 33 of the main body 32 of the paper pressing member 31, as shown in FIG. In this embodiment, the engaging portion 39 is formed integrally with the main body base end portion 33 in order to reduce costs and the like.

On the other hand, a stopper 51 is provided on the stationary body (41).
Is provided.

The stopper 51 is, as shown in FIGS.
The elastic deformation permitting portion 37 resists the rotation of the main body 32 in the direction of the arrow R (the direction away from the discharge roller 11) by engaging with the engaging portion 39 while elastically deforming the elastic deformation permitting portion 37. The main body 32 is urged toward the discharge roller 11 by using the elastic restoring force. In FIG. 5, the degree of the deformation is exaggerated in order to clearly show the elastic deformation of the elastic deformation permitting portion 37 of the rotating shaft 35. Part 3
Since it is possible to make the size minute by appropriately selecting the arrangement position and the like with respect to 9, the pressing force against the paper due to plastic deformation does not change.

In this embodiment, the stopper 51 is formed in a triangular cross section, and the engaging surface 51a is formed so as to overlap with the movement miracle of the engaging surface 39a of the engaging portion 39. . More specifically, the stopper 51
Is formed such that the greater the amount of rotation of the main body 32 in the direction of the arrow R, the greater the amount of overlap with the engaging portion 39.

Therefore, the main body 32 of the paper pressing member 31
Is rotated in the direction of arrow R, the elastic deformation allowing portion 37 of the rotating shaft 35 elastically deforms according to the amount of overlap between the stopper 51 and the engaging portion 39. Then, the main body 32 cooperates with the stopper 51 and the engaging portion 39 to form the elastic deformation allowing portion 3.
The elastic roller 7 is urged toward the discharge roller 11 by the elastic restoring force (force for returning to the original shape).

Next, the operation will be described.

The paper discharged from the discharge roller 11 comes into contact with the main body 32 of the paper pressing member 31 and urges the main body 32 in the direction of arrow R.

Then, the stopper 51 provided on the stationary body (41) engages with the engaging portion 39 provided on the base end portion 33 of the main body to prevent the main body 32 from rotating in the direction of arrow R. It resists while elastically deforming the elastic deformation allowing portion 37 slightly. Then, the stopper 51 further urges the main body 32 toward the discharge roller 11 by using the elastic restoring force of the elastic deformation allowing portion 37. Thus, the sheet is guided to the sheet storage section (21) while being pressed by the sheet pressing member 31 with a constant force.

As a result, the discharged paper can be stably stored in the paper storage section (21). Thus, according to this embodiment, the paper pressing member 31 is connected to the main body front end portion 34.
Is rotatably supported by a stationary body (41) via a rotary shaft 35 so as to abut against the discharge roller 11, and an elastic deformation permitting portion 37 is formed on at least one of the main body 32 and the rotary shaft 35. An engaging portion 39 is provided on the portion 33, and the stationary body (41) is elastically deformed with respect to the rotation of the main body 32 in the direction away from the discharge roller 11 (the direction of the arrow R) by engaging with the engaging portion 39. The body 32 is adapted to resist while elastically deforming the allowing portion 37 and to use the elastic restoring force of the elastic deformation allowing portion 37
Is provided with a stopper 51 for urging the discharged paper toward the discharge roller 11, so that the discharged paper is pressed by the paper pressing member 31 with a constant force while the paper storage portion (stock box 2) is being pressed.
Guide to 1).

Further, when assembling the sheet discharging mechanism, the rotating shaft 35 of the sheet pressing member 31 only needs to be rotatably supported by the stationary body (41), so that the assembling can be easily performed. Further, since the paper is pressed using the elastic restoring force of the elastic deformation permitting portion 37, the weight of the main body 32 of the paper pressing member 31 does not need to be particularly increased, and there is no need to provide a spring. Thereby, the structure is simplified, and the size and weight can be easily reduced.

Accordingly, the paper storage unit (21) can stably discharge paper while reducing the size and weight and simplifying assembly.
Can be accommodated.

In the above embodiment, the elastic deformation permitting portion 37 is connected to the main body 32 of the rotating shaft 35 of the paper pressing member 31.
Although formed in the deviated portion, the entire rotating shaft 35 may be formed as an elastic deformation permitting portion 37 by forming the entire rotating shaft 35 from an elastic material. Further, the elastic deformation allowing portion 37 may be provided on the main body 32 side. For example, the elastic deformation permitting portion 37
May be formed by weakening the rigidity of the main body 32 near the rotation shaft 35 as compared with other parts, as shown in FIG.

Although the stopper 51 has a triangular cross section, the stopper 51 engages with the engaging portion 39 to resist the rotation of the main body 32 in the direction of arrow R while elastically deforming the elastic deformation allowing portion 37. As long as the main body 32 can be urged toward the discharge roller 11 by using the elastic restoring force of the elastic deformation permitting portion 37, any shape (for example, a concave shape that can engage with the engaging portion 39) can be used. Good.

Further, the engaging portion 39 may be provided separately from the sheet pressing member 31 and attached to the member 31.

Furthermore, the present paper discharge mechanism 10 is applied to a printer, but may be applied to other industrial equipment which discharges paper.

[0039]

According to the present invention, the paper holding member is rotatably supported on the stationary body via the rotating shaft such that the leading end of the main body comes into contact with the discharge roller, and at least one of the main body and the rotating shaft has elasticity. A deformation permitting portion is formed, an engaging portion is provided at a base end portion of the main body, and the stationary body is elastically deformable permitting with respect to rotation of the main body in a direction away from the discharge roller by engaging with the engaging portion. And a stopper that biases the main body toward the discharge roller by utilizing the elastic restoring force of the elastic deformation permitting portion, so that the discharged paper is kept at a constant force by the paper pressing member. The guide can be guided to the paper storage unit while being pressed. Further, when assembling the sheet discharging mechanism, it is only necessary to rotate and support the rotating shaft of the sheet pressing member to the stationary body, so that the assembling can be easily performed. Further, since the paper is pressed using the elastic restoring force of the elastic deformation allowing portion, it is not necessary to increase the weight of the paper pressing member or the like, and it is not necessary to provide a spring.

Therefore, the discharged paper can be stably accommodated in the paper accommodating portion while reducing the size and weight and simplifying the assembly.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention.

FIG. 2 is a front view showing a main part of one embodiment.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a diagram illustrating a state in which a paper pressing member is urged toward a discharge roller by a stopper.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a view showing a modified example of the sheet pressing member.

FIG. 7 is a view for explaining a conventional sheet discharging mechanism.

FIG. 8 is a diagram illustrating a sheet discharging mechanism configured to rotate and support a sheet pressing member on a stationary body and press the sheet using the weight of the pressing member.

FIG. 9 is a view showing a sheet discharging mechanism configured to rotate and support a sheet pressing member on a stationary body and press the sheet using the elastic force of a spring.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 paper discharge mechanism 11 discharge roller 21 stock box (paper storage section) 31 paper press member 32 main body of paper press member 33 base end of main body 34 distal end of main body 35 rotation axis of paper press member 37 elastic deformation allowance section 39 Joint 41 Transparent cover (stationary body) 51 Stopper

Claims (1)

(57) [Claims] A discharge roller for discharging the paper, a paper storage portion disposed downstream of the discharge roller in a paper conveyance direction and capable of storing the discharge paper, and a paper storage portion between the discharge roller and the paper storage portion. A paper presser member having a paper presser member capable of guiding the paper presser to the paper storage section, wherein the paper presser member comprises a main body and a rotating shaft provided at a base end of the main body, and The main body and the stationary body are rotatably supported via the rotating shaft so that the distal end portion abuts on the discharge roller, and an elastic deformation allowing portion is formed on at least one of the main body and the rotating shaft. An engaging portion is provided, and the stationary body engages with the engaging portion and resists the elastic deformation allowing portion while elastically deforming the elastically deformable portion against rotation in a direction away from the discharge roller of the main body. The elastic restoring force of the elastic deformation allowable part A paper discharge mechanism, wherein a stopper is provided for urging the main body toward the discharge roller by utilizing the stopper.