JPS6360830A - Paper feeding device - Google Patents

Abstract

PURPOSE:To securely install each cassette by enabling the selective use of a cassette in which the separation of sheets of paper is carried out by means of a separating craw and a cassette in which the separation of sheets of paper is carried out by means of a gap, and contriving the installing method of these cassettes to a machine frame. CONSTITUTION:A paper feeding device B for automatically feeding sheets of paper in a paper feeding stacker 22 from a paper feed port 7a to a printing device A, has a paper feeding cassette 22 consisting of two cassettes 22A, 22B for housing different types of sheets of paper respectively. The cassette 22A is formed by providing a pair of right and left separating craws which are engaged with the end edge part of the top sheet of paper, and the cassette 22B is formed by providing a sheet end engaging member which forms a paper feeding gap for the amount of one sheet of paper toward a paper feed roller 30. And, the cassette 22A is installed with its rear end part being swingably supported by a machine frame 21 so that its end part approaches the paper feed roller 30, and the cassette 22B can be installed to the machine frame 21 with a contacting member which is brought into contact with the rotary shaft of the paper feed roller 30 being provided on it.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to paper (sheets) that are pre-loaded and stored in the main bodies of printers, printing machines, copying machines, and other various processing devices.
The present invention relates to a paper feeding device that separates and supplies paper sheets one by one.

[Conventional technology]

Generally, as a method for separating and feeding stacked sheets one by one starting from the topmost sheet, a paper feed roller is provided in pressure contact with the topmost sheet of paper stacked and stored on the stacker, and one sheet of paper is placed on the downstream side of this paper feed roller. Provide a paper feed gap that allows sheets to pass through.
A known method for feeding relatively thick sheets is to separate and feed the sheets one after the other. However, with this type of paper feeding device using the so-called gap separation method, if the posture of the paper on the stacker, the position of the paper feeding roller, and the position of the paper feeding gap are not always in a constant relationship, paper feeding errors such as double feeding and non-feeding may occur. Conventionally, the stacker, paper feed roller, and members that form the paper feed gap are integrated into the machine frame. The paper on the stacker is replaced and replaced. In other words, no method has been proposed in which a stacker (cassette) corresponding to the paper size is prepared and the entire stacker is replaced depending on the paper to be used, as is the case with copying machines. Therefore, when feeding different types of paper to a printing device or other processing device, if the paper is relatively thick, such as a card, the above-mentioned gap separation method is the easiest separation method.
Adoption by replacing the stacker has not yet been proposed. In the present invention, a paper feeding gap, which is conventionally provided on the downstream side separately from the paper feeding roller, is constructed between the paper feeding roller and a paper end abutting piece provided at the leading end of the stacker, thereby feeding the stacker. It is based on the idea that the paper roller can be removed and replaced separately, and if the paper used is thick paper such as a card, a simple gap separation method can be adopted. I was faced with the problem that the spacing and positional relationship with the contact piece was easily distorted.

[Purpose of the invention]

In view of the above, the present invention provides a method for easily switching between the corner claw separation method and the gap separation method by replacing the paper feed cassette according to the type of paper to be used on the paper feed rotating body attached to the machine frame of the device. The object of the present invention is to provide a paper feeding device that is capable of reliably separating and feeding a wide variety of papers.

[Solution]

In order to achieve the above object, the present invention has two or more paper feed cassettes for storing paper of different sizes, and the uppermost paper is engaged with a paper feed rotor mounted on a rotating shaft supported by a device frame. a first cassette body which is removably attached to the device frame so that the paper feed cassette can be connected to the paper storage frame, and which is provided with a pair of left and right separation claws on both sides of the paper storage frame to engage with the leading edge corner of the first L paper;
In the paper feeding device, the second cassette body is provided with a tip locking piece that forms a feeding gap for one sheet between the paper storage frame and the paper feeding rotation body at the tip of the paper storage frame. The cassette body is mounted with its rear end swingably supported on the device frame so that the front end in the paper feeding direction approaches the paper feeding rotary body, and the second cassette body is attached to the side of the paper storage frame. A means for solving this problem is to provide an abutting piece that abuts the rotating shaft of the paper feeding rotary body and to attach it to the machine frame of the apparatus.

[Explanation of Examples]

The illustrated example shows a case in which a paper feeder B is detachably attached to a device A consisting of a printer, and sheets are separated and fed one by one to a paper feed port of a processing device A. The printer is a normal thermal transfer printer, and includes a platen 1 that backs up paper in the printing section P, a printing element 2, a carriage 3 that carries the printing element 2 and moves step by step at each character interval, and the platen 1. A platen paper feed mechanism 4 that feeds the paper in the position stepwise in the row direction
and a drive device M for this paper feeding mechanism, the printing element 2 prints on the paper according to the printing signal output from the computer or the input key, and the carriage 3 moves step by step according to the character spacing. It is designed to cause the next print to be executed. When printing for one line is completed, the paper feed mechanism 4 is operated to step feed the sheet to the next line. In FIG. 1, 5 is a casing, and the platen 1 is fixedly supported on an internal frame 6. This platen 1 is composed of a shaft-like stem member positioned in the paper width direction, and its surface facing the paper is made of an elastic material such as rubber. A U-shaped paper path 7 is constructed around the platen 1, and the paper is taken in from the paper feed lower a at one end, printed on the platen 1, and then discharged from the paper ejection lower b at the other end. It has become. The paper path 7 is equipped with a paper feeding mechanism that feeds the paper to the platen 1 part and at the same time feeds the paper in steps at the platen 1 part as follows. In the illustrated example, since the platen 1 does not have a paper feeding function, a paper feeding roller 8 is rotatably supported on the frame 6 in addition to and adjacent to the platen 1. connects one end to the drive motor M and the gear transmission mechanism 9
The other end is provided with a knob 10 for manual rotation as shown in FIG. A paper guide 11 is disposed opposite to the paper feed roller 8 across the paper path 7, and a pinch roller 12.
3 is the placement. These pinch rollers 12 and 13 are arranged in two rows near the paper feed lower a and near the platen 1.
The plate spring holder 14 is fixed to the frame 6 with screws 15 so as to be in constant pressure contact with the paper feed roller 8 side. The carriage 3 is movable left and right in the paper width direction, with its rear end 3a attached to the guide rail 16 of the frame 6, and its tip 3b attached to the guide rail 16 of the frame 6.
are respectively fitted onto shafts 17 attached to the frame. Although not shown in the drawings, as usual, the rack is fixed to endless wires passing over pulleys at the left and right ends of the platen 1, and at the same time a stepping motor is connected to one of the pulleys. Therefore, the carriage 3 is equipped with several printing elements 2 consisting of thermal heads that can swing freely on a shaft 19 so that they come into contact with the platen 1 during printing and separate when not printing, and are connected to the printing control circuit by flexible wiring. has been done. Further, a ribbon tape is mounted on the carriage 3, and the tape is wound up in response to the movement of the carriage 3 in the printing direction. Reference numeral 20 in the figure indicates a paper sensor disposed in the paper feed path 7, which detects the trailing edge of the paper being printed, determines the last line to be printed, stops the printing operation, and at the same time rotates the paper feed roller 8 by a predetermined amount to is discharged from discharge lower b. In the illustrated printer, the paper feeding mechanism 4 is composed of a paper feeding roller 8 disposed near a fixed platen, but instead of this, the platen itself is composed of a rotatable roller-like member,
After the pinch roller is pressed, a drive motor may be connected to this roller-like platen to feed the paper by rotation of the platen. Therefore, the paper feeding device B of the present invention is configured as a paper feeding and discharging unit B that automatically supplies the paper to the frame 6 of the printing device A together with a paper discharging device that guides the paper from the paper discharging lower b to the paper discharging stacker and stacks and stores the paper. be. This paper feed/discharge unit B is provided with a paper feed stacker 22 and a paper discharge stacker 23 in a machine frame 21 at a position connected to a paper feed lower a and a paper discharge lower b of a printing machine main body A, and a frame of the printing machine A. It is designed to be removably attached to 6. Therefore, the paper ejection device includes a paper ejection roller 25 arranged near the paper ejection lower b of the printing machine A, and a paper ejection guide 26 that can be opened and closed and guides the sheets to the paper ejection stacker, facing the paper ejection roller 25.
and a paper discharge stacker 23. Particularly, the paper discharge stacker 23 has a section 23a for the trailing edge of the paper and a section 23 for the rear paper holder.
b, and both receivers are comprised of a manual feed slit 27 into which paper is inserted through the gap shown in the drawing. This manual feed slit 27 is connected to a path 28 prepared so that the manual feed paper can be fed to which pressure contact point of the paper feed roller 8 and the pinch roller 12 of the paper feed lower a of the printer main body A is fed. A paper ejection path 29 from the paper ejection lower b of the printer main body A to the paper ejection stacker 23 is configured between the paper ejection roller 25 and the paper ejection guide 26.
The paper is ejected at the same speed as the paper conveyance speed of the platen paper feeding mechanism 4 described above. Next, the paper feeding device will be explained. This paper feeding device consists of a paper feeding stacker 22, a paper feeding roller 30 that engages with the topmost sheet of paper stacked and stored in this paper feeding stacker 22, and this paper feeding roller 30. A paper feed path 31 that guides the fed paper to the pressure contact point of the paper feed roller 8 and the pinch roller 12 described above.
It is composed of. These are attached to a device frame 21 as shown in FIG. 1.2. The device frame 21 is composed of a pair of left and right side plates 32.33 and a bottom plate 34 that connects the left and right side plates. 25 rotating shaft 35 and its transmission gears 36, 3
7, 38, 39, 40, the chucking members 41, 42 to the printing machine A are attached, and the paper feed stacker 22 is installed on the bottom plate 34, and at the same time, the tip 34a of the bottom plate 34 is installed.
constitutes a paper feed path 31 that guides the paper fed out by the paper feed roller 30 to the paper feed 17a.The paper feed roller 30 is equipped on a rotating shaft 34 attached to the left and right side plates 32 and 33. Similarly to the rotating shaft of the paper ejection roller 25 described above, a gear 36° 38.39.40
It is connected to the drive device M on the printing machine A side by
They are designed to rotate together at the same timing. In other words, the output shaft 41 of the drive motor M built in the printing machine A
Power is transmitted from the platen paper feed roller 8 to the rotating shaft 8a by gear transmission. A gear 36 on the paper feeder side meshes with the gear 42 in the gear transmission system, and the rotating shaft 35 of the paper discharge roller 25 is driven by the gear 36 and the gear 37.
Rotating shaft 3 of paper feed roller 30 with gear 38° 39.40
4 is designed to rotate. The paper feed roller 34 is composed of two or more rollers spaced apart from each other in the width direction. The one shown in the figure consists of three pieces, and this is so that it can feed various types of paper with different paper thicknesses and paper widths, which will be described later, by replacing the paper feed stacker. The positional relationship between the paper width and the rollers is selected so that paper with a small width such as a postcard is fed with three rollers, and two rollers are used to feed paper with a small width such as a postcard. A mounting space 43 for a paper feed stacker is prepared between the paper feed roller 30 and the bottom plate 34, and a space 43 for mounting a paper feed stacker is provided in the bottom plate 34 of this space 43. A plate spring guide 44 facing directly below the paper feed roller 30 is attached. This leaf spring guide 44 has a spring action to urge the paper feed stacker mounted in the mounting space 43 toward the paper feed roller 30 side, and at the same time serves as a guide when inserting the stacker into the space 43. It is composed of an inclined plate-like member. According to the present invention, such a paper feed stacker is configured with two or more paper feed cassettes each accommodating sheets of different widths and types. The first cassette body 22A is constructed by attaching separating claws 46a and 46b to the left and right sides of the paper storage frame 45 shown in FIGS. The second cassette body 22B forms a paper feed gap G corresponding to the thickness of one sheet of paper between the tip of the paper storage frame 47 shown in FIGS. 3 and 4 and the paper feed roller 30. The end abutting pieces 48a and 48b are provided, and are respectively attached to the mounting space 43 of the device frame 21. The first cassette body 22A is composed of left and right side plates 45a, 45b which are integrally molded with a resin sheet storage frame 45, and a bottom plate 45C, and separation claws 46 are provided on the left and right side plates 45a, 45b.
The rear end of the armray y
It is installed so that it swings downward. An idle roller 52a52b is embedded in the bottom plate of the first cassette body 22A facing the paper feed roller 30, which reduces the load when the paper feed roller 30 rotates when the paper on the cassette 22A is empty. That's what I do. Along with this, the cassette 22A has a protrusion 5 hanging down from the bottom.
3, and this protrusion 53 is adapted to align with a guide groove 54 formed on the bottom plate 34 of the device frame 21. When inserting and setting the cassette 22A into the mounting space 43, the protrusion 53 is aligned with the guide groove 54 in the left and right direction. This is how we position ourselves. Furthermore, the locking protrusion 55 formed on one side of the force cera) 22A and the device frame 21 is fitted and locked into the locking hole 56 formed on the other side, so that they are held in the state shown in Fig. 1. . In other words, in the state shown in FIG. 1, the rear end of the cassette 22A is connected to the locking protrusion 55 and the locking hole 56, and the tip is swingable around this joint, and the leaf spring guide 4
4, it is urged toward the paper feed roller 30 side. Next, the paper cassette) 22B has the paper storage frame 47 on the left and right side plates 47a.
, 47b and a bottom plate 47c, and a paper mounting table 57 is disposed inside this storage frame 47 so as to be vertically movable. In other words, the rear end of the platform 57 is connected to the storage frame 47 by the pin 58.
The platform 57 is mounted on the bottom plate 47c of the storage frame 47, and its tip is supported so as to be able to move vertically around this pin 58. It is a force. The illustrated cassette) 22B is designed to accommodate left and right side plates 47 of the storage frame 47 so that cards such as postcards can be stored in both horizontal and vertical positions.
A sliding side plate 60 is attached to one of a and 47b so that its position in the width direction can be adjusted. In other words, the width dimensions of the left and right side plates 47a and 47b are set according to the size of the horizontal position, and the slide side plate 60 is supported by fitting its bent piece 61 into the guide groove 62 of the bottom plate 47c. By moving the side plate 60 to the right side in FIG. 4, it is possible to hold the paper in a vertical position. Similar to the cassette body 22A, this cassette body 22B is formed with a protrusion 53 hanging down from its bottom plate 47c, and is adapted to fit into the guide groove 54 of the device frame 21 and be installed at the same time. A hanging protrusion 55 is provided. The left and right side plates 47a, 47 of the cassette body 22B are
A positioning piece having a 0-shaped groove 63 extending from b fits into the rotating shaft 34 of the paper feed roller 30, and the positional relationship between the paper feed roller 30 and the cassette body 22B, especially the paper feed roller 30 and the tip end abutment. The paper feeding gap between the sheet 48a and the sheet 48a is kept constant. This tip end abutting piece 48a is formed integrally with the storage frame 47, and locks the leading edge of the paper on the paper loading table 57-L, and simultaneously feeds the topmost sheet of paper in cooperation with the paper feed roller 30. A sheet feed gap corresponding to the thickness of one sheet of paper is formed between the roller and the roller so as to feed the sheet.
A is formed only at a position facing the center of the paper feed roller 30. This is to prevent non-feeding by arranging the feed roller at the center of the sheet where the waviness is least when the sheet is wavy or curled in the width direction. Therefore, the present invention provides the cassette body 22A and the cassette body 22A.
This relates to the attachment of B to the device frame 21. First, the first cassette body 22A is mounted so that its rear end is swingably supported by the apparatus frame 21 so that its leading end in the paper feeding direction approaches the paper feeding rotary body, that is, the illustrated paper feeding roller 30. In the illustrated case, latching protrusions 55 are provided at two places on the left and right at the rear end in the paper feeding direction of the cassette body 22A.
is fitted into a locking hole 56 provided in the device frame 21, and together with this, the entire paper storage frame 45 is pushed up by the leaf spring guide 44 and held within the mounting space 43. Next, the second cassette body 22B is attached to the left and right sides 47a and 47b of the paper storage frame 47 with abutment pieces 63 that abut against the rotating shaft 30a of the paper feed rotor (paper feed roller 30).
At the same time that the distance and positional relationship between the end abutting pieces 48a and 48b are kept constant, the latching protrusion 55 provided on the cassette body 22B is fitted into the latching hole 56' of the device frame 21. 1st
Similarly to the cassette body 22A, the mounting space 4 of the device frame 21 is
3 and held stationary in the state shown in FIG. Note that the abutting piece 63 of the second cassette body 22B does not necessarily have to be formed from the U-shaped groove shown in FIG. It's okay. In this case, a plate spring guide 44 is required to constantly push the paper storage frame 47 upward toward the rotating shaft 30a.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the paper feeding device of the present invention;
Fig. 2 is a top view, Fig. 3 is an enlarged sectional view, Fig. 4 is a top view of the cassette body 22A, Fig. 5 is a schematic diagram of the drive system, Fig. 6 is an enlarged view of the paper tray, and Fig. 7 is its plan view. 21...Device machine frame 30...Paper feed rotating body 22
...Cassette body patent Applicant: Nippon Seimitsu Kogyo Co., Ltd. Commissioner of the Patent Office Kuro 1) Mr. Yu Akira (Examiner of the Patent Office) 2. Name of the invention Paper feeding device 3. Relationship with the amended person case Patent applicant Address (Residence) 111 3167 Miya-cho, Kofu City, Nashi Prefecture Name (Name) Japan Seimitsu Kogyo Co., Ltd. Address (Residence) 1-7 Yukitani Otsuka-cho, Ota-ku, Tokyo Name (Name) Alps Electric Co., Ltd. 4 Agent 4f”lO November 25, 1985 (shipment date) 6 Number of inventions increased by amendment 7 Subject of amendment 8 Contents of amendment 1, as per the engraving and attached sheet of the specification originally attached to the application
(No change in content). 2. As per the engraving and attached sheet of the drawings originally attached to book ii (
(no change in content). 3. Submit a power of attorney for Alps Electric Co., Ltd.

Claims (1)

[Claims] 1. Two or more paper feed cassettes that store paper of different sizes are stored on the paper feed rotary body installed on the rotating shaft supported by the machine frame, and can be freely attached to and detached from the machine frame so that the top paper is engaged. The paper feed cassette is attached to a first cassette body, which has a pair of left and right separating claws on both sides of the paper storage frame that engage with the leading edge corners of the topmost paper, and a paper feed rotating body at the front end of the paper storage frame. and a second cassette body provided with a distal end locking piece that forms a feed gap for one sheet of paper between the first cassette body and the second cassette body, in which the first cassette body feeds paper to the paper feed rotation body. The rear end of the second cassette body is swingably supported and attached to the machine frame so that the front end approaches the second cassette body, and the second cassette body is attached to the side of the paper storage frame in contact with the rotating shaft of the paper feed rotary body. A paper feeding device characterized in that a contacting piece is provided and the paper feeding device is mounted on a device frame.