JPH04135534U - automatic paper feed mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] In a facsimile machine, the purpose is to increase the sending force of document paper from the paper drive roller of the automatic paper feed mechanism to the paper passing path system of the device with narrow intervals and high resistance. . [Structure] A document sheet 9 is attached to a pad holder 8, which is attached so that a pad 11 for a paper brake is in contact with a paper drive roller 3 that protrudes from the document supply table 1, so that the document sheet 9 is introduced under the pad 11. A backup spring 13 is attached so as to press the original paper that has passed through the pad 11 together with the conveyance guide spring 12 against the paper drive roller 3 again.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

Does not change the separation performance of multiple documents fed to the automatic paper feed mechanism of the facsimile machine. This invention relates to an automatic paper feeding mechanism that increases the conveyance force.

0002

[Conventional technology]

Conventionally, the automatic paper feeding mechanism of facsimile machines feeds manuscript paper through the paper as shown in Figure 2. The document feeding table is installed tangentially to the paper drive roller for feeding the paper into the paper path system. Attach the pad holder with the pad at the tip so that it is parallel, so that it rotates. A compression spring is applied so that this pad holder is pressed perpendicular to the tangent to the paper drive roller. Attach to the tip and smoothly feed the manuscript paper to the paper drive roller. A conveyance guide spring is attached for this purpose. Automatic paper feeding mechanism configured as above The friction μ1 between the paper drive roller and the multiple stacked manuscript papers fed to the The friction μ2 between the manuscript papers and the friction μ3 between the pads that hold down the stacked manuscript papers are The configuration is such that μ1 > μ3 > μ2, and the paper drive roller The document paper that is in contact with the paper is separated by the rotation of the paper drive roller, and It is designed to be sent to

0003

[Problem that the idea aims to solve]

As mentioned above, the paper drive drives multiple stacked original papers fed to the original supply table. The paper is separated by rollers and sent one by one to the paper path system, but recent paper In the Kushimiri device, we aim to reduce the size of the device and increase the number of rollers used to convey paper. This reduces and simplifies the process so that the next paper is transported from the paper drive roller on the document supply table. The paper path system up to the feeding rollers has become narrower and more complicated, making it difficult to transport manuscript paper. The resistance increases, and the paper drive roller and pad pressure on the document feeder table and the transport guide With just the spring pressure and the feeding force, the document paper can be smoothly transferred to the next paper conveyance roller. In order to increase the feeding force, increase the pad pressure and the feeding guide spring pressure. For example, noise from the motor that suppresses the paper drive roller may increase and documents may be fed redundantly. Even if there is jamming on the way or the paper is transported to the next paper transport roller, it will continue at a constant speed. There was a problem in that the paper was not conveyed and the image quality was adversely affected.

0004

[Means to solve the problem]

In order to solve the above problem, paper is provided that protrudes from the opening of the document supply table. A pad holder with a pad at the tip is used to hold down the drive roller from above. and press the compression spring to press the pad holder against the paper drive roller. At the same time, guide the document paper to the contact point between the pad and the paper drive roller. In an automatic paper feed mechanism equipped with a transport guide spring, the paper drive roller and front The document paper is formed so as to be pressed against the paper drive roller after contact with the recording pad. Features a biased backup spring attached to the pad holder. Provides an automatic paper feeding mechanism that

[0005]

[Effect]

As mentioned above, the pressure of the pad holder against the paper drive roller and the transport guide In an automatic paper feed mechanism that separates and transports original paper using spring pressure, the paper is separated and transported. It has a biasing force that further presses the manuscript paper that has begun to roll against the paper drive roller. Separation capacity can be increased by attaching a back-up spring to the pad holder. without increasing motor noise or duplicate document feeding. It is possible to increase the pushing force of the manuscript paper, and it is possible to carry out the conveyance smoothly.

[0006]

【Example】

Hereinafter, embodiments of this invention will be described in detail with reference to the drawings. Figure 1 shows the present invention FIG. 2 is a partial side view, including a partial cross section, of an embodiment of an automatic paper feeding mechanism according to the present invention.

[0007] In the figure, reference numeral 1 denotes a document supply table, which has an opening 2 in the center and a paper drive roller. A paper feeding guide plate 4 connected to the document supply table 1 is provided with a protruding roller 3. A paper passing path 5 is formed, and a pinch roller 6 and a conveyance roller 7 are formed at the tip of the path. With this, the original paper 9 is conveyed. 8 presses the paper drive roller 3 A pad holder (not shown) is attached to the pedestal so that it can rotate. The document paper 9 fed in layers is placed at the leading end of the paper drive roller 3. Except for the bottom sheet that has been separated by A compression spring 10 to prevent the conveyance and a pad 11 to stop the conveyance by friction are attached. Both include a conveyor for inserting the manuscript paper 9 between the paper drive roller 3 and the pad 11. When the leading edge of the document paper 9 separated from the feed guide spring 12 passes the pad 11, it is moved again. A backup spring 13 is attached to press against the paper drive roller 3. There is.

[0008] By supplying the document paper 9 to the automatic paper feed mechanism configured as described above and operating it, the original The draft paper 9 is sent to the pad 11 by the paper drive roller 3 and the conveyance guide spring 12. The paper is in contact with the paper drive roller 3 due to the friction coefficient μ1 > μ3 > μ2. Only one sheet is sent out through the pad 11 together with the paper drive roller 3, and then passed through the pad 11. By being pressed by the backup spring 13, the feeding force is increased and the paper passing path 5 sent to.

[0009]

[Effect of the idea]

As mentioned above, the pressure of the pad holder against the paper drive roller and the transport guide In an automatic paper feed mechanism that separates and transports original paper using spring pressure, the paper is separated and transported. It has a biasing force that further presses the manuscript paper that has begun to roll against the paper drive roller. Separation capacity can be increased by attaching a back-up spring to the pad holder. without increasing motor noise or duplicate document feeding. Capable of increasing the feeding force of manuscript paper and ensuring smooth conveyance. can be used with peace of mind without the need for monitoring even when feeding multiple manuscript papers. It is effective for the user to be able to do so.

[Brief explanation of drawings]

FIG. 1 is a partial side view, partially in section, of an embodiment of an automatic paper feeding mechanism according to the present invention.

FIG. 2 is a partial side view, including a partial cross section, of an embodiment of a conventional automatic paper feeding mechanism.

[Explanation of symbols]

1 Original supply table 2 Opening 3 Paper drive roller 4 Paper passing guide plate 5 Paper route 6 Pinch roller 7 Conveyance roller 8 Pad holder 9 Manuscript paper 10 compression spring 11 pad 12 Conveyance guide spring 13 Backup spring

Claims (1)

[Scope of utility model registration request] 1. A pad holder equipped with a pad at the tip is attached to press a paper drive roller from above that is protruded from an opening of a document supply table, and the pad holder is pressed against the paper drive roller. In an automatic paper feed mechanism equipped with a compression spring and a conveyance guide spring that guides the document paper to the contact point between the paper drive roller and the paper drive roller, the document paper is transferred to the paper after the contact point between the paper drive roller and the pad. An automatic paper feeding mechanism characterized by having a backup spring attached to a pad holder, which is formed and biased to press against a drive roller.