JP3381134B2 - Structure of paper transport path - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a paper transport path for transporting a paper in a paper cassette to a printing section in a printer or the like, and in particular, a plurality of paper cassettes are provided, and the paper transport path is accompanied by this. The present invention relates to the structure of a plurality of paper transport paths.

[0002]

2. Description of the Related Art Generally, the structure of this type of paper transport path is
A plurality of paper transport paths are provided corresponding to the plurality of paper cassettes, and the plurality of paper transport paths are merged into one common paper transport path on the downstream side in the paper transport direction and transported to the printing unit. . The plurality of paper transport paths are individually formed by the plurality of transport guides, and the common paper transport path is formed by the common transport guide together with the plurality of transport guides. The common conveyance guide is movably supported by the frame of the apparatus, and is configured to come in contact with and separate from the plurality of conveyance guides. When a paper jam occurs, the common conveyance guide is separated from the plurality of conveyance guides. The paper jammed is removed by separating and opening the common paper conveyance path.

[0003]

In the above-described conventional paper transport path structure, since the common paper transport path is open, it is relatively easy to jam the paper in the common paper transport path. Can handle. However, since the plurality of paper transport paths are not opened, when a paper jam occurs in the plurality of paper transport paths, it is complicated to remove the jammed paper.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its object is to:
An object of the present invention is to provide a structure of a paper transport path which has a simple structure and facilitates the work of removing the paper causing the paper jam.

[0005]

In order to achieve this object, the structure of the sheet conveying path according to the present invention has a plurality of conveying guides forming a plurality of sheet conveying paths and a plurality of conveying guides together with the plurality of conveying guides. And a common conveyance guide that forms a common paper conveyance path that joins the paper conveyance paths, and the plurality of conveyance guides and the common conveyance guide are rotatably supported by the frame of the apparatus. A sheet conveyance path common to the sheet conveyance path can be opened and closed, and rotation of the common conveyance guide is restricted by a pin provided on a frame of the apparatus and a hook provided on the common conveyance guide so as to be detachable from the pin. One rotation regulating means is provided, and the plurality of conveyance guides are rotated by the pins provided on the plurality of conveyance guides and the support plate provided on the common conveyance guide that engages with the pins. A second rotation restricting means for restricting is provided, and the plurality of transport guides are provided by the elongated holes provided in the apparatus frame and the shafts fitted in the elongated holes and integrally moved with the pins provided in the plurality of transport guides. The rotation limit is regulated. Therefore, when the paper jam occurs, if the restriction of the first restriction means of the common conveyance guide is released, the common paper conveyance path is opened and the rotation of the plurality of conveyance guides by the second restriction means is prevented. Regulations are released and a plurality of paper transport paths are opened at once.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a printer that employs the structure of the paper conveyance path according to the present invention, FIG. 2 is a perspective view showing the printer in a disassembled state, FIG. 3 is a side view of the paper feed section of the printer, and FIG. FIG. 5 is a side view of the structure of the paper transport path according to the invention, FIG. 5 is a view taken along the arrow V in FIG. 4, and FIG. 6 is a side view of a common transport guide in the paper transport path according to the invention.
FIG. 7 is a front view of a common conveyance guide, and FIG. 8 is a side view showing a state in which the paper conveyance path is opened in the structure of the paper conveyance path according to the present invention.

In FIG. 1, reference numeral 1 designates a printer, which is a printer, and includes three paper cassettes 2a, 2b, 2c that can be inserted into and removed from the apparatus, and a paper feed unit for manual paper feed that allows paper to be fed by hand. 3, a stacker 4 for discharging printed sheets fed into the apparatus, and an operation panel 5 provided with control buttons for various operations.
In FIG. 2, a paper feed unit 7, a control unit and a power supply unit 9, a spacing unit 10, a discharge unit 11 and the like are housed in a cabinet 6 that forms a housing of the printer 1, and these are arranged in the front-back direction in the cabinet 6. It is movably supported by. The paper feeding unit 7 includes cassette units 12a, 3a formed in three stages for accommodating the above-mentioned paper cassettes 2a, 2b, 2c in a removable manner.
The spacing unit 10 is provided with 12b and 12c.
Is provided with a print head (not shown) for printing paper.

Next, referring to FIG. 3, a schematic structure of the paper feeding unit 7 will be described. Each cassette unit 12a,
A paper cassette insertion slot 13 is provided at the rear end of each of 12b and 12c.
Cassette detection switches 14a, 14b, 14c for detecting the paper cassettes 2a, 2b, 2c inserted in the direction of arrow A from a, 13b, 13c are provided. At the upper rear end side of each cassette unit 12a, 12b, 12c,
The pickup roller 15a, which has been widely known from the past,
15b and 15c are provided. Behind these pickup rollers 15a, 15b, 15c,
First, second, and third transport guides 35, 36, 3 described later
The first, second, and third sheet conveyance paths 30a, 30b, and 30c formed by 7 and the common conveyance guide 57 and the common sheet conveyance path 31 are provided.

In such a structure, when the control button of the operation panel 5 is operated for printing, the pickup roller of any one of the cassette units 12a, 12b, 12c is selected and rotated a predetermined number of times. . By rotating the pickup roller a predetermined number of times, the topmost sheet of the selected cassette unit
First, second, and third sheet conveyance paths 30 corresponding to each other
a, 30b, 30c. The delivered sheet is delivered to a common sheet conveying path 31 by sheet feeding rollers 19b, 21b, 24b, which will be described later, and pinch rollers 58, 45, 39 which are in contact with the sheet. The paper sent to the common paper transport path 31 is fed by the paper feed rollers 20b, 22.
b and 23b and the pinch roller 58 that is in contact with the b and 23b, the paper is conveyed in the common paper conveyance path 31 and is sent to the printing unit located in the arrow B direction.

A drive pulley 18, a plurality of driven pulleys 19 to 24, and these pulleys 18 to 24 are provided on the outer surface on the front side of one side plate 8a of both side plates 8a and 8b of the frame of the apparatus forming the paper feeding unit 7. A plurality of tension pulleys 26 that are interposed therebetween are provided. The drive pulley 18 is pivotally mounted on a shaft 18a rotatably supported between the side plates 8a and 8b, and is rotationally driven by a drive motor (not shown) via the shaft 18a. Driven pulleys 19-24
Is a shaft 19 rotatably supported between the side plates 8a and 8b.
a to 24a, and the tension pulley 26 is attached to the side plate 8
It is rotatably supported by a shaft 26a that is horizontally mounted between a. An endless belt 17 is stretched between the drive pulley 18, the driven pulleys 19 to 24, and the tension pulley 26. Rotation of the drive pulley 18 is transmitted to the driven pulleys 19 to 24 via the endless belt 17. It is configured. Reference numeral 27 denotes a relay gear that meshes with a gear (not shown) formed integrally with the pulley 26, and is attached to a shaft 28a rotatably supported between both side plates 55b and 55c of a common conveyance guide 55 described later. The driven gear 28 is engaged.

Next, the first, second and third conveyance guides 35, 36 and 37 will be described with reference to FIGS. 4 and 5. The first transport guide 35 includes the side plates 8a of the frame of the apparatus,
It is composed of a first guide portion 35a and a second guide portion 35b so as to extend between 8b, and is formed in a curved shape in a side view by a flat plate member. The first transport guide 35 is provided on both side plates 8a of the frame of the apparatus.
It is fixed between 8b. Driven rollers 23b, 24b
Faces the inside of the first sheet conveyance path 30a and the common sheet conveyance path 31 from a window (not shown) formed in the first conveyance guide 35.

The second transport guide 36 is a shaft 21a rotatably supported between both side plates 8a and 8b of the frame of the apparatus.
With the center of rotation as the center of rotation, the upper portion is supported by both side plates 8a and 8b so as to be rotatable in the direction of arrow C in FIG. As shown in FIG. 8, the rotation end of the second conveyance guide 3 is located in the long holes 70 formed in both side plates 8a and 8b of the frame of the apparatus.
It is determined by inserting a horizontally mounted shaft 42 between both side portions (not shown) of 6. One end of a plate 41 is fixed to the left and right ends of the shaft 42, and a pin 43 is planted at the other end of the plate 41.

The second conveying guide 36 is a first guide portion 36 formed by bending a flat plate member extending between both side plates 8a and 8b of the frame of the apparatus into a substantially U-shape when viewed from the side.
a, the second guide portion 36b, and the third guide portion 36c. Reference numeral 39 denotes a pinch roller rotatably supported by a bracket 40 rotatably supported by the second transport guide 36.
From the window formed in the guide portion 36a of the first sheet conveying path 3
It is biased so as to face the inside of 0a and is in contact with the driven roller 24b.

The third transport guide 37 has the same structure as the second transport guide 36 described above. That is, the third conveyance guide 37 has both side plates so that the upper part thereof is rotatable in the direction of arrow D in FIG. 4 about the shaft 19a rotatably supported between the side plates 8a and 8b. 8a, 8
supported by b. As shown in FIG. 8, the rotation end is a long hole 7 formed in both side plates 8a and 8b of the frame of the device.
No. 0 is determined by inserting a horizontally extending shaft 49 between both side parts (not shown) of the second transport guide 36.
One end of a plate 48 is fixed to the left and right ends of the shaft 49, and a pin 50 is planted at the other end of the plate 48.

The third conveyance guide 37 is a first guide portion 37 formed by bending a flat plate member extending between both side plates 8a and 8b of the frame of the apparatus into a substantially U-shape when viewed from the side.
a, a second guide portion 37b, and a third guide portion 37c. Reference numeral 45 denotes a pinch roller rotatably supported by a bracket 46 rotatably supported by the third conveyance guide 37. The pinch roller 45 is provided with a second coil through a window formed in the first guide portion 37a by a torsion coil spring. Paper transport path 30
It is biased so as to face the inside of b and is in contact with the driven roller 21b.

Next, the common conveyance guide 55 will be described with reference to FIGS. 4, 6 and 7. The common transport guide 55 is
A bottom plate 55a and both side plates 55b and 55c are formed in a substantially U-shaped cross section so as to extend between the both side plates 8a and 8b of the frame of the apparatus. A common transport guide plate 57 is attached so as to cover the opening of the common transport guide 55.
Is a flat plate member extending between both side plates 8a and 8b of the frame of the apparatus, which is curved and formed into a substantially S-shape in a side view. Pins 56, 56 pivotally attached to both side plates 8a, 8b of the frame of the apparatus are planted under the side plates 55b, 55c. Therefore, this common conveyance guide 55
Is rotatably supported on both side plates 8a, 8b in the direction of arrow E in FIG. 4 via these pins 56, 56, and the lower limit of rotation in the direction E is determined by a stopper (not shown).

Reference numeral 58 denotes a pinch roller rotatably supported by a bracket 59 which is rotatably supported by a common transport guide 55, and is a window formed in a common transport guide plate 57 by a torsion coil spring. To common paper feed path 3
The driven rollers 19b, 20 are urged to face the inside of the roller 1.
It is in contact with b, 22b, and 23b. On both side plates 55b and 55c of the common transport guide 55, two pairs of upper and lower support plates 60 are provided, and these support plates 60 have plates of the second and third transport guides 36 and 37. Four
Engagement recesses 60a that engage with the pins 43 and 50 of 1,48 are formed. By engaging the engaging recess 60a of the support plate 60 with the pins 43, 50, rotation of the second and third transport guides 36, 37 in the directions of arrows C and D is regulated, and second rotation regulation. Forming the means. In the vicinity of the upper support plate 60, a pair of hooks 63, 63 is provided on both side plates 55b, 5b.
It is axially attached to both ends of a shaft 64 rotatably supported between 5c and is urged by a torsion coil spring in the direction of arrow F in FIG.

An operating plate 65 is fixed to the peripheral surface of the shaft 64 at a substantially central portion thereof, and a gripping plate 66 is fixed to a bottom plate 55a of a common conveyance guide 55 so as to face the operating plate 65. By gripping the plate 65 and the grip plate 66 with fingers and rotating the operation plate 65 in the direction of arrow G, the hook 6
3 rotates in the direction of arrow G against the elastic force of the torsion coil spring via the shaft 64. In FIG. 7, reference numeral 67 denotes a paper feed roller, which is rotatably mounted on the shaft 28a of the driven gear 28 and sends out the paper conveyed in the common paper conveyance path 31 in the arrow B direction. A pin 71 as a first rotation restricting means for restricting the rotation of the common conveyance guide 55 in the arrow E direction by engaging the hook 63 is planted on both side plates 8a, 8b of the frame of the apparatus. .

Next, in the structure of the sheet conveying path having such a structure, the sheet conveying operation and the sheet removing operation at the time of paper jam will be described. First, the procedure for forming the paper transport path will be described with reference to FIG. First transport guide 3
5 is fixed between both side plates 8a and 8b of the frame of the apparatus. In this state, the common conveyance guide 55 is rotated in the direction opposite to the arrow E in the drawing with the shaft 56 as the rotation center, and the hook 63 is moved to the pin 71 of both side plates 8a and 8b of the frame of the apparatus.
By engaging with, the rotation of the common transport guide 55 in the arrow E direction is restricted.

At this time, the engaging recesses 60a of the upper and lower support plates 60 of the common transport guide 55 are engaged with the pins 43 and 5 of the plates 41 and 48 of the second and third transport guides 36 and 37, respectively.
Engage 0. Therefore, when the common conveyance guide 55 is rotated in the direction opposite to the arrow E, both the second and third conveyance guides 36 and 37 are rotated in the directions opposite to the arrows C and D. When the hook 63 of the common conveyance guide 55 is engaged with the pin 71 to restrict the rotation of the common conveyance guide 55 in the arrow E direction, the arrows C and D of the second and third conveyance guides 36 and 37 are formed. Rotation in the direction is also restricted.

In this state, the first transport guide 35
Of the first guide portion 35a and the second transport guide 36
The first sheet conveying path 30a is formed by the guide portion 36a. In addition, the third guide portion 3 of the second transport guide 36
The second sheet conveyance path 30b is formed by 6c and the first guide portion 37a of the third conveyance guide 37. Further, the third guide portion 37c of the third transport guide 37 and the lower portion of the transport guide plate 57 of the common transport guide 55 form a third sheet transport path 30c. Furthermore, the first transport guide 35
Second guide portion 35b of the second conveyance guide 36
Of the third guide portion 37b of the third conveyance guide 37 and the conveyance guide plate 5 of the common conveyance guide 55.
A common sheet conveyance path 31 is formed with the sheet conveyance path 7.

In such a structure, when a paper jam occurs, the operation plate 65 and the grip plate 6 of the common conveyance guide 55 are common.
6 is grasped with a finger, and the operation plate 65 is rotated in the direction of arrow G to remove the hook 63 engaged with the pin 71, and the common conveyance guide 55 is rotated around the shaft 56 as an arrow E. Rotate in the direction. As a result of this rotation, the shafts 42, 49 of the plates 41, 48 held by the support plate 60 of the common conveyance guide 55 pass through the elongated holes 70 of the side plates 8a, 8b of the frame of the apparatus in the arrow C in FIG. , Sliding in the D direction. Therefore, the second and third transport guides 36,
37 also has arrows C, with the axes 21a, 19a as the centers of rotation.
Since it rotates in the D direction, not only the common paper transport path 31 but also the first, second, and third paper transport paths 30a, 30b,
30c is also opened. Therefore, the common paper transport path 31 and the first, second, and third paper transport paths 30a, 3
Even if a paper jam occurs in 0b and 30c, the work of removing the paper becomes easy.

[0023]

As described above, according to the present invention, a plurality of conveyance guides forming a plurality of paper conveyance paths and a common paper conveyance path where the plurality of paper conveyance paths join together with the plurality of conveyance guides are formed. And a common conveyance guide, and the plurality of conveyance guides and the common conveyance guide are rotatably supported by the frame of the apparatus, so that the plurality of paper conveyance paths and the common paper conveyance path can be freely opened and closed. The plurality of transports are provided with first rotation restricting means for restricting rotation of the common transport guide by a pin provided on a frame of the apparatus and a hook provided on the common transport guide so as to be detachable from the pin. A second rotation restricting means for restricting the rotation of the plurality of transport guides is provided by a pin provided on the guide and a support plate which is engaged with the pin and is provided on a common transport guide. By a shaft that moves said pin and integrally provided to a plurality of conveyance guides is fitted in the elongated hole and the elongated hole provided in the arm is obtained by restricting the rotation end limit of said plurality of transport guides. Therefore, when a paper jam occurs, not only opening the common sheet conveyance path by releasing the regulation of the first regulation means of the common conveyance guide, but also the plurality of conveyances by the second regulation means. The restriction on the rotation of the guide is released, and the plurality of paper transport paths are opened.
Therefore, not only the jammed paper in the common paper conveyance path can be easily removed, but also the jammed paper in the plurality of paper conveyance paths can be easily removed. Further, the opening of the plurality of paper transport paths is performed in conjunction with the opening operation of the common paper transport path, so that the operation is easy. Furthermore, since the plurality of conveyance guides and the common conveyance guide are both rotatably supported by the frame of the apparatus, the movement space of both conveyance guides does not become large when the paper conveyance path is opened. Therefore, the installation space of the device can be reduced. Further, since the rotation can be restricted by the pin and the hook and the pin and the support plate, the structure becomes simple.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of conveyance guides and a common conveyance guide are formed of flat plate members, and the flat plate members are made to face each other to form a paper conveyance path. A drive roller is formed on the side of a plurality of conveyance guides so as to face the sheet conveyance path from a window formed in the conveyance guide, and a window formed in the common conveyance guide is formed from the window formed in the common conveyance guide to the sheet conveyance path. By providing the pinch roller facing the drive roller, the sheet is conveyed between the flat plate members by the drive roller and the pinch roller, so that the sheet is smoothly and reliably conveyed.

[0025]

[Brief description of drawings]

FIG. 1 is an external view of a printer that employs the structure of a paper transport path according to the present invention.

FIG. 2 is an exploded perspective view showing a printer that employs the structure of the paper transport path according to the present invention.

FIG. 3 is a side view of a paper feed unit of a printer that employs the structure of the paper transport path according to the present invention.

FIG. 4 is a side view of the structure of the paper transport path according to the present invention.

5 is a view on arrow V in FIG. 4. FIG.

FIG. 6 is a side view of a common conveyance guide in the sheet conveyance path according to the present invention.

FIG. 7 is a front view of a common conveyance guide in a sheet conveyance path according to the present invention.

FIG. 8 is a side view showing a state in which the paper transport path is opened in the structure of the paper transport path according to the present invention.

[Explanation of symbols]

19a, 21a, 24a, 56 ... Shaft, 30a ... First paper transport path, 30b ... Second paper transport path, 30c ... Third paper transport path, 31 ... Common paper transport path, 35 ... First Transport guide, 36 ... Second transport guide, 37 ... Third transport guide, 43, 50 ... Pin, 55 ... Common transport guide,
60 ... Support plate, 63 ... Hook, 65 ... Operation plate, 70 ... Long hole, 71 ... Pin.

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shozo Kamiyama 3-3-3 Toyosu, Koto-ku, Tokyo NTT Data Communications Corp. (72) Inventor Mikio Nagai Shiba, Minato-ku, Tokyo 5-7-1 Nihon Electric Co., Ltd. (72) Inventor Naoya Takayama 3-49, Kamiishihara, Chofu-shi, Tokyo 1-day Electric Data Equipment Co., Ltd. (56) Reference JP-A-2-138072 (JP , A) JP-A-3-267226 (JP, A) Actual development 4-91954 (JP, U) Actual development 2-22947 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) (Name) B65H 5/00-5/38

Claims (2)

(57) [Claims] 1. A plurality of transport guides that form a plurality of paper transport paths, and a common transport guide that forms a common paper transport path where the plurality of paper transport paths join together with the plurality of transport guides. By rotatably supporting the plurality of conveyance guides and the common conveyance guide on the frame of the apparatus, the plurality of paper conveyance paths and the common paper conveyance path can be opened and closed, and the pins provided on the frame of the apparatus and
The flap provided on the common transport guide is detachable from the pin.
First regulating the rotation of the common conveyance guide by
Of the plurality of transfer guides.
The pin provided on the cable and this pin engage with this pin to form a common conveyance guide.
Rotation of multiple transport guides is restricted by the provided support plate
The second rotation restricting means is provided and is provided on the device frame.
Before the long hole and the multiple guides fitted in the long hole
The plurality of transports by the pin and the shaft that moves integrally.
A structure of a sheet conveyance path characterized in that a rotation limit of a guide is regulated . 2. The paper transport path structure according to claim 1, wherein the plurality of transport guides and the common transport guide are formed of flat plate members, and the flat plate members are opposed to each other to form the paper transport path. A drive roller is formed on the side of a plurality of conveyance guides so as to face the sheet conveyance path from a window formed in the conveyance guide, and a window formed in the common conveyance guide is formed from the window formed in the common conveyance guide to the sheet conveyance path. A structure of a sheet conveying path, characterized in that a pinch roller facing the drive roller is provided.