JPH0515617B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a roll paper support device, which is used for recording and reproducing records wound in a roll in, for example, facsimiles, printers, etc. Concerning the structure that supports paper.

(Prior Art) Conventionally, as a structure for supporting a roll of recording paper, for example, as shown in FIG.
a pair of support stands 3 having an arcuate support surface 2 thereon;
3 is provided, and a roll portion 5 on which recording paper 4 is wound in a roll is placed on these support stands 3,3.

Recording paper 4 pulled out from this roll unit 5
is sent via a guide 6 by a pair of feed rollers 7, 7 to a recording section having a recording head and the like.

(Problems to be Solved by the Invention) However, in the conventional support structure as described above, the recording paper 4 is pulled out from the roll section 5 by driving the feed rollers 7, 7; Even if the rotation stops, the roll portion 5 may rotate due to inertia and feed out extra recording paper 4, or the roll portion 5 may rotate due to machine vibration and the recording paper 4 may be fed out. Therefore, slack occurs in the recording paper 4 between the roll portion 5 and the feed rollers 7, 7, and this slack causes a meandering feeding failure of the recording paper 4, causing paper jams and the like.

Therefore, as a means to prevent this sagging, applying tension to the recording paper 4 using a spring or the like may be considered, but as the number of parts increases, there are problems such as an increase in price, deterioration of ease of assembly, and hindrance to miniaturization. .

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a roll paper support device that has a simple structure and prevents meandering, poor feeding, etc. caused by the occurrence of slack in the roll paper. It is.

[Structure of the invention]

(Means for Solving the Problems) The present invention rotatably supports a roll paper, and as the rolled paper is pulled out, the roll paper is rotatably supported at a fulcrum position corresponding to the winding axis of the roll paper. A supported support is provided, and a fulcrum of the support that rotatably supports the support when the roll paper is pulled out and stopped after being pulled out is connected to the support and the roll supported by the support. a locking part that is eccentrically provided on the opposite side of the drawer side of the roll paper with respect to the center of gravity of the paper roll and restricts the rotation range of the support body on the puller side of the roll paper and on the opposite side of the drawer side; It has been established.

(Function) In the present invention, when the roll paper is pulled out, the support body rotates about the fulcrum toward the pull-out side due to the pull-out force of the roll paper. The rotating position of the support toward the drawer side is regulated by the locking portion.

In addition, when the roll paper stops after being pulled out, the support rotates downward on the opposite side from the drawer side around the fulcrum due to the relationship between the centers of gravity of the support and the roll paper supported by the support. Then, the pull-out side of the roll paper moves downward, and the slack of the pulled-out roll paper is absorbed. The downward rotational position of the support is regulated by a locking portion.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 and 2 show the external appearance of a facsimile machine that transmits and receives information using a telephone line.

This facsimile machine has a transmitting/receiving section 1 that is supported between a pair of main frames 13a and 13b that are spaced apart from each other on a lower frame 12 of a main body 11, and that transmits and receives documents.
4, and a main drive section 15 for driving the transmitting/receiving section 14, which is centrally arranged outside one main frame 13a of the transmitting/receiving section 14. Original transport section 1 transports the document to
6, a reading section 17 that scans and reads the transported document, and a recording paper feeding section 18 that sends recording paper.
It is comprised of a recording and reproducing section 19 that records and reproduces received data transmitted onto the recording paper being sent.

The document feeding section 16 is provided on the upper surface of the main body 11, and is a plate-shaped document whose front surface is fed in a document conveying direction F from the rear side of the main body 11 (right side in FIG. 2) to the front side. A conveyance guide 21 is attached, and drive rollers 23 fixed to a drive roller shaft 22 are disposed protruding from the upper surface of the document conveyance guide 21 at the start and end sides of the document conveyance method F of the document conveyance guide 21. . This drive roller shaft 22
Both ends of the roller are rotatably supported by the pair of main frames 13a and 13b, and the drive roller shaft 22 protruding from one of the main frames 13a is centrally disposed outside the main frame 13a. connected to a drive motor 25 via a plurality of gears 24 of the main drive unit 15;
It is rotationally driven by this drive motor 25.

Further, between the drive rollers 23 and 23 on the starting end side and the ending end side of the document conveyance direction F of the document conveyance guide 21, there is a space between the drive rollers 23 and 23 on the start end side and the end side of the document conveyance direction F, in a direction perpendicular to the document conveyance direction F (main scanning direction A of the reading section 17). An open reading window 26 is formed, and a transparent plate 27 made of glass, for example, is fitted into the reading window 26.

Further, above the document conveyance guide 21, conveyance rollers 28, 28 which are in pressure contact with the upper part of each drive roller 23, 23 are rotatably supported by a frame body 29, and the upper surface of this frame body 29 A cover body 31 on which a plurality of operation switches 30 for facsimile operations such as transmission, reception, and reset are arranged is attached to the cover body 31. Although not shown, the bottom plate 29a of the frame body 29 includes a light source that emits light onto the document conveyance guide 21 and detects the document by changing the amount of reflected light depending on the document conveyed on the document conveyance guide 21. A reflective sensor is installed.

The reading section 17 has a carrier 32 that reciprocates in the main scanning direction A in the width direction of the document orthogonal to the document conveyance direction F, and this carrier 32
It is slidably attached to a pair of guide shafts 33, 33 installed parallel to the main scanning direction A between the main frames 13a, 13b. This carrier 32 is provided with a cylindrical reading frame 34 facing below the reading window 26 of the document conveyance guide 21, and a cylindrical reading frame 34 is provided at the bottom of the reading frame 34. A photoelectric conversion element (hereinafter referred to as CCD) 36 is provided, which receives light irradiated onto the document from a light source through the reading window 26 through a lens 35 disposed in the middle of the reading frame 34. The scanning area of the original is broken down into individual picture elements and converted into electrical signals representing the recorded content of the original.

Also, on the bottom of this carrier 32, there is a CCD 36
A printed wiring board 37 is attached which has a control circuit to which the CCD 36 is connected and which receives and transmits electrical signals from the CCD 36 and sends the received signals to the recording and reproducing section 19.

Note that this carrier 32 has main frames 13a, 13
The wire 39 is connected to a wire 39 that extends over a pulley 38 that is attached to a pulley 38 projecting outwardly from the main drive section 15 so as to be rotatable in the horizontal direction. It is sent out from the take-up roll 40 and wound up, and then sent to the reading section 1.
The carrier 32 is reciprocated in the main scanning direction A along the guide shaft 33 when the document is read by the recording and reproducing section 7 and when the recording and reproducing section 19 performs recording and reproducing.

In the recording paper feeding section 18, a roll paper 41 is arranged at the front end of the main body 11, and this roll paper 41 is
A roll portion 44 is formed by winding a band-shaped recording paper 42 around a cylindrical core material 43.
4 is rotatably supported by a support body 45. This support body 45 consists of a receiving tray 47 having a semicircular receiving surface 46 on the upper surface, and on this receiving tray 47,
The roll section 44 is placed on one edge 48a facing the recording/reproducing section 19 located approximately at the center of the main body 11, with the side from which the recording paper 42 is pulled out from the roll section 44 aligned. On both end surfaces 49, 49 of this tray 47, fulcrums 50, 50 made of round shafts are protruded at positions eccentric to the other edge 48b opposite to the drawer side of the recording paper 42 with respect to the center of gravity of the tray 47. The fulcrums 50, 50 are the main frames 13a, 13
In a state in which it is rotatably fitted into the support holes 51, 51 provided at the tip of the tray 47, one edge 48a side rotates downward around the fulcrum 50 due to the action of gravity, and the bottom surface of the saucer 47 moves downward. It comes into contact with the frame 12 and stops.

Further, the rotation of the support body 45 toward the drawer side is caused by the second rotation.
As shown in the drawings and FIG. 3, the stopper 52 is regulated by coming into contact with the bottom surface of the lower frame 12, while the rotation of the support body 45 in the direction opposite to the drawer side is prevented as shown in FIG. The lower surface of the surface 46 comes into contact with the bottom surface of the lower frame 12 and is regulated. Therefore, the stopper 52, the receiving surface 46, and the lower frame 12 are connected to the support body 45.
It is configured as a locking part that restricts the rotation range of.

Also, the recording/reproducing section 19 behind this saucer 47
A pair of feed rollers 53, 53 are installed between the main frames 13a, 13b. The recording paper 42 is introduced through the guide plate 54, and from between the feed rollers 53, 53, the recording paper opened at the upper part of the recording/reproducing section 19 and the main body 11 is introduced through the arc-shaped lead-out plate 55. The recording paper 42 is sent to the upper surface of the main body 11 from the outlet 56. Note that this recording paper 42 is made of thermal paper having heat-sensitive properties.
2 is wound around the roll part 44, which is replaceably arranged inside and outside the main body 11.
4 only needs to be placed on the receiving surface 46 of the receiving tray 47. Further, on the upper surface of the guide plate 54, a recording paper 42 is provided.
A pair of paper guides 54a are provided to guide both sides of the paper.

Further, a drive motor 58 is connected to a roller shaft 53a of one feed roller 53 that protrudes outward from one main frame 13a via a plurality of gears 57.
The recording paper 42 is rotated by this drive motor 58.
send. A cutter 59 is provided at the rear edge of the recording paper outlet 56, and the cutter 59 cuts the recording paper 42 sent out from the recording paper outlet 56 after reception is completed.

The recording/reproducing section 19 is provided at the front end of the carrier 32 so as to move back and forth in the main scanning direction A together with the reading section 17, and is attached to a heat-sensitive mounting section 61 provided at the front end of the carrier 32. A head base 63 is mounted with a recording head 62 consisting of elements facing the surface of the recording paper 42 led out from the lead-out plate 55, and the connector 65 at the tip of the flexible printed wiring 64 led out from the head base 63 is attached to the head base 63. It is connected to a printed wiring board 37.

Further, a flat platen 67 attached to a support frame 66 is arranged along the main scanning direction A facing the surface of the recording head 62, and the main frames 13a, 1
A spring body 69 attached to a fixed frame 68 installed on the recording head 3b urges the support frame 66 toward the recording head 62, and the platen 67 is pressed against the recording head 62.
Further, an operating piece 71 of a solenoid 70 attached to the outside of the main frame 13a engages with the support frame 66 via an arm 72, and the operation of the solenoid 70 causes the platen 67 to be separated from the recording head 62. .

Further, on the upper surface of the front end side of the main body 11, a keyboard 76 having a plurality of operation keys 75 is mounted on the support shaft 76 at the front end.
The keyboard 76 is provided so as to be openable and closable centering on the facsimile machine, and the telephone number of the destination when making a call using a handset (not shown) provided with the facsimile, the facsimile number of the destination when sending a manuscript, etc. are input into this keyboard 76.

Next, the operation of this embodiment will be explained.

When transmitting a document, when the document is inserted from the rear of the upper surface of the main body 11 between the frame body 29 and the document conveyance guide 21 along the document conveyance direction F, the document is detected by a light reflective sensor (not shown) provided on the frame body 29. is detected and introduced for a predetermined length between the drive roller 23 and the conveyance roller 28 on the starting end side.

Then, by inputting the destination facsimile number from the keyboard 76 and operating the transmission start operation switch 30, the document is transported in the transport direction F by the drive roller 23 and transport roller 28 (every time the carrier 32 moves in the main scanning direction A). ), and the carrier 32 is reciprocated in the main scanning direction A along the guide shaft 33,
A light source (not shown) is turned on, and the light source illuminates the original through the reading window 26. The original illuminated with this light is read by the CCD 36 through the transparent plate 27 and the lens 35, and the CCD 36 scans the original. The area is broken down into individual picture elements, converted into electrical signals representing the recorded contents of the document, and sent to the destination.

Further, when the light reflection type sensor of the frame 29 does not detect the document and detects that there is no longer an area to scan the document, the carrier 32 stops at a predetermined standby position, and the drive roller 23 on the end side The original is sent out to the upper surface of the main body 11 by the roller 28, and the transmission is completed.

Next, when receiving, the receiving operation is automatically started based on the call from the receiving party, and the carrier 3
2 moves along the guide shaft 33 in the main scanning direction A, and the original scanning area of the opposite side, which is received by the recording head 62, is detected based on electrical signals representing recorded content broken down into individual picture elements. , and prints on the recording paper 42 pressed by the platen 67. Each time the recording head 62 moves in the main scanning direction A, the drive motor 58 drives the feed rollers 53, 53 for a predetermined period of time, and the recording paper 42 is pulled out from the roll section 44.
is sent out along the lead-out plate 55. Further, when the recording paper 42 is fed, the solenoid 70 is energized and the platen 67 is separated from the recording head 62.

Note that when the recording paper 42 is pulled out from the roll portion 44 by driving the feed rollers 53, 53, the roll portion 44 is pulled up as shown in FIG.
The stopper 52 on the other edge 48b of the tray 47 comes into contact with the bottom surface of the lower frame 12, and the roll portion 44 rotates on the receiving surface 46 of the tray 47 in this state to record the data. Paper 42 is pulled out.

Further, when the drive of the feed rollers 53, 53 is stopped, the center of gravity of the tray 47 on which the roll portion 44 is placed is on the one edge 48a side, so the tray 47 moves downward toward the one edge 48a side with the fulcrum 50 as the center. Due to the force of gravity that tends to rotate, one edge 48a side of the tray 47 rotates downward, as shown in FIG.
The lower surface of the receiving surface 45 comes into contact with the bottom surface of the lower frame 12 and stops. Therefore, the recording paper 42 is generated due to inertial rotation of the roll unit 44 when the recording paper 42 is pulled out.
roll part 4 due to excessive feed or vibration.
Even if slack occurs between the feeding rollers 53, 53 in the clamped state and the roll section 44 due to rotation of the recording paper 4 in the drawing direction, the drawing side of the roll section 44 moves downward, so that the recording paper 42 The feed rollers 53, 5 are in a clamped state after the slack has been absorbed.
3, tension is applied to the recording paper 42.

In addition, as the recording paper 42 is used, the roll section 4
The diameter and weight of the roll portion 4 decrease, but due to the downward rotation of the one edge 48a side of the tray 47 due to the action of gravity, the roll portion 44 whose diameter has become smaller also moves to the one edge 48a. side, the center of gravity consisting of the roll part 44 and the receiving tray 47 moves away from the fulcrum 50, and the moment distance becomes longer. Therefore, the tension applied to the recording paper 42 is proportional to the diameter and weight of the roll part 44. Become the appropriate force.

Further, when the reception is completed, the carrier 32 stops in a predetermined standby state, and the recording paper 42 is fed a predetermined length by the feed rollers 53, 53, and at least the last print is made by the recording head 62. A portion of the recording paper 42 is sent out from a recording paper outlet 56.

In the above embodiment, the roll portion 4 is
However, when pulling out the recording paper 42 of the roll part 44 from the other edge 48b side of the tray 47, it is necessary to pull out the recording paper 42 of the roll part 44 from the side of the edge 48a of the tray 47. The fulcrum 50 may be provided eccentrically.

Furthermore, although the fulcrum 50 was provided eccentrically with respect to the center of gravity, the fulcrum 50 may be provided at the center of the center of gravity of the tray 47, and a weight member may be provided on one edge 48a of the recording paper 42 on the drawer side. Accordingly, the center of gravity position may be eccentric with respect to the position of the fulcrum 50. Note that by providing this weight member, the fulcrum 50 of the receiving tray 47 can be placed at any position.

Further, in the above embodiment, the roll portion 44 is supported by the tray 47, but it may be rotatably supported by a support shaft passing through the core material 43 of the roll portion 44. In this case, the fulcrum of the support shaft may be provided eccentrically with respect to the center of gravity.

〔Effect of the invention〕

According to the present invention, the fulcrum of the support for supporting the roll paper is provided eccentrically to the side opposite to the drawer side of the roll paper with respect to the center of gravity of the support and the roll paper supported by the support. The support body can be rotatably supported when the roll paper is pulled out and when it is stopped after being pulled out, so after the roll paper is pulled out, the center of gravity between the support body and the roll paper supported by this support body is The support body rotates around the fulcrum to the side opposite to the drawer side, and the drawer side of the roll paper moves downward, which can absorb the slack of the drawn roll paper, and is a simple method that does not require a tension mechanism. This configuration can prevent meandering of the roll paper, poor feeding, and the like.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the mechanical appearance of a facsimile machine showing an embodiment of the roll paper support device of the present invention, FIG. 2 is a longitudinal sectional view thereof, FIGS. 3 and 4 are illustrations of its operation, and The figure is a longitudinal sectional view of a conventional roll paper support device. 41... Roll paper, 45... Support, 47...
Receiver, 50... fulcrum, 52... stopper constituting a part of the locking portion.

Claims (1)

[Scope of Claims] 1. A support body is provided that rotatably supports a roll paper and is rotatably supported at a fulcrum position corresponding to the winding axis of the roll paper as the rolled paper is pulled out. , A fulcrum of the support body that rotatably supports the support body when the roll paper is pulled out and when stopped after being pulled out is set at a center of gravity between the support body and the roll paper supported by the support body. In contrast, a locking portion is provided eccentrically on the side opposite to the drawer side of the roll paper, and restricts the rotation range of the support body on the drawer side of the roll paper and the side opposite to the drawer side. Roll paper support device. 2. The support is a tray on which the roll paper is rotatably placed, and a fulcrum is provided at both ends of the tray eccentrically in a direction opposite to the drawer side of the roll paper with respect to the center of gravity of the tray and the roll paper. 2. A roll paper support device according to claim 1, further comprising: a roll paper support device; 3. The roll according to claim 2, characterized in that a weight member is provided on the drawer side of the roll paper of the tray, and the center of gravity of the tray is eccentric to the drawer side of the roll paper with respect to the fulcrum position of the tray. Paper support device.