JPH0439014Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a printing device that uses a roll of recording paper.

(Prior Art) As shown in FIGS. 4 and 5, in a printing device, a roll-shaped recording paper 1 rotatably supported in a machine body (not shown) is moved from its roll portion to a pair of feed rollers 2, 2, this fed-out recording paper 1 is printed along guide plates 3a and 3b by a printing unit 3 consisting of a print head 4 and a platen 5, and is then sent outside the machine from a paper outlet 7 on the top surface of the machine. sent to.

One edge of this paper outlet 7 is made up of a blade-shaped part 8 that cuts the rear end of the recording paper 1 that has been printed and sent out from the paper outlet 7, and the other edge is made of It is constituted by an opening/closing end 9a of a lid 9 which is rotatably supported on a shaft and is provided on the top surface of a space in which the recording paper 1 of the machine body is housed so as to be openable and closable.

The lid 9 is provided so that it can be opened and closed in order to replace the recording paper 1 with a new one when the recording paper 1 runs out.

(Problems to be solved by the invention) In the conventional printing device, the recording paper 1 printed by the printing unit 6 and sent out from the paper outlet 7 is cut by the blade-shaped part 8, and then the presence or absence of the recording paper 1 and the presence or absence of the recording paper 1 are cut. When the cover body 9 is opened and closed to check the remaining amount, etc., the tip 1a cut by the blade 8 of the recording paper 1 will end up along the two-dot chain line A in FIG. 5 due to the curl of the recording paper 1. As shown, if the lid body 9 is collapsed in the opposite direction to the blade-shaped portion 8 and closed in this state, it will be pressed by the opening/closing end 9a of the lid body 9, as shown by the two-dot chain line B in FIG. There is a problem in that the recording paper 1 is not fed out during printing, resulting in a paper jam.

The present invention has been devised in view of the above-mentioned points, and an object of the present invention is to provide a printing device that can prevent paper jams of recording paper.

[Structure of the idea]

(Means for Solving the Problem) The present invention consists of a machine body in which a roll of recording paper is arranged, a feed roller that feeds out the recording paper, and a printing unit that prints on the recording paper fed out by the feed roller. , a paper outlet provided on the outer surface of the machine from which recording paper is fed out of the machine from the printing section; a lid that forms the edge of the paper outlet and is provided on the machine so that it can be opened and closed; The device is provided with a detection section that detects the open state, and a reverse feed control section that outputs a signal to reversely rotate the feed roller for a predetermined period of time when the detection section detects the open state of the lid.

(Function) In the present invention, when the detection unit detects that the lid is opened, the signal output from the reverse feed control unit in the control circuit causes the motor to rotate in the reverse direction to reversely feed the recording paper, thereby removing the leading edge of the recording paper. By returning the paper from the paper outlet into the machine, the edge of the lid can hold the leading edge of the recording paper against the back of the lid when the lid is opened and then closed to check the presence or absence of recording paper and the remaining amount. prevent it from entering.

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

Figure 3 shows an information communication device that is equipped with an integrated printing device. A handset 12 with a transmitting and receiving function is connected to the upper part of one side of 11,
A facsimile reading device and a printing device are arranged inside the other side of the body 11.

As shown in FIGS. 1 and 2, the printing device is disposed on the front end side of the machine body 11.
A recording paper 14 made of thermal paper whose surface has been treated with heat-sensitive properties is stored in a recording paper storage section 13 provided inside the recording paper storage section 13.
A roll part 15, which is wound into a roll shape, is rotatably supported, and the roll part 15 is rotatably driven in the forward and reverse directions by a motor (not shown) on the drawer side of the recording paper 14 (on the right side in FIG. 1). A feed roller 16 is disposed, and a feed roller 17 is placed in pressure contact with the feed roller 16 and driven to rotate in forward and reverse directions.
This pair of feed rollers 16, 17 rotates forward (first
(in the direction of the arrow in the figure), the feed roller 1
The recording paper 14 introduced and held between the paper feeders 6 and 17 is intermittently fed out a fixed distance. This fed-out recording paper 14 is placed on the guide plate 1
The other end of the guide plate 18 and the guide plate 19 are guided from the roll portion 15 between the feed rollers 16 and 17 by one flat end of the guide plate 18 and the guide plate 19 which is curved.
is led out to the printing section 20 by.

The printing section 20 includes a printing head 21 made of a heat-sensitive element facing the surface of the recording paper 14, and a platen 22 facing the printing head 21 and provided along the width direction of the recording paper 14. 2
The platen 1 is driven back and forth along the width direction of the recording paper 14 (hereinafter referred to as the main scanning direction) during printing, and the platen 22 is pressed against the print head 21 during printing, and the platen 22 is pressed against the print head 21 during non-printing and when paper is fed. 21 is becoming more and more disengaged.

Above the printing section 20, there is a recording paper 14 on which printing is performed.
A paper outlet 23 from which the paper is sent out to the top surface of the machine body 11 is formed by opening in the shape of a groove on the top surface of the machine body 11. It is constituted by a blade-shaped portion 24 that cuts the recording paper 14, and the other edge is constituted by a lid 25.

This lid body 25 has edges 2 on both sides of the back surface of the lid body 25.
6, 26 are provided, and support grooves 27, 27 provided at the front ends of these edges 26, 26 rotatably engage support shafts 28, 28 protruding from both inner surfaces of the front end of the fuselage 11. The lid body 25 is configured to be able to open and close a space inside the body 11 in which the recording paper 14 and the like are stored around the support shafts 28, 28. Further, an opening/closing end 29 on the rear end side of the lid 25 constitutes the other edge of the paper outlet 23, and one side end of this opening/closing end 29 is provided for opening the lid 25. A hook groove 30 for hooking a finger is provided. Note that a plurality of operation buttons, display functions, etc. are formed on the surface of the lid body 25.

Further, inside the front end of the body 11, a detection means 31 of a detection section is arranged facing one edge 26 of the lid 25 and detecting the open/closed state of the lid 25. This detection means 31 consists of a switch 32 fixed to the inner surface of the front end of the body 11, and when the lid 25 is closed, the operating piece 33 of the switch 32 is activated at the edge of the lid 25.
is pressed downward to be in the on state, and when the lid 25 is opened, the edge 26 of the lid 25 is separated upward and the operating piece 33 of the switch 32 is moved upward to be in the off state. Then, the detection section switches the switch 3
The open/close state of the lid body 25 is detected from the on/off state of No. 2.

Furthermore, when the switch 32 of this detection section is turned off to detect the opening of the lid body 25, the reverse feed control section of the control circuit provided inside the body 11 causes the motor that rotationally drives the feed roller 16 to rotate in reverse for a predetermined period of time. A signal is output.

Next, the operation of this embodiment will be explained.

When printing based on the receiving operation of information communication equipment,
As shown in FIG. 1, the platen 22 is pressed against the print head 21, and the print head 21 is moved along the main scanning direction, and the scanned area from the destination is divided into individual picture elements. The image is printed on the recording paper 14 based on the received signal representing the image. Each time the print head 21 moves in the main scanning direction, the platen 22 is separated from the print head 21, and the feed roller 16 is rotated in the forward rotation direction for a predetermined period of time, so that the recording paper 14 is removed from the roll section 15. The paper is pulled out for a certain length and sent to the printing section 20 and the paper outlet 23 for a certain length.

When the reception is completed, the feed roller 16 is driven for a predetermined period of time, and the part of the recording paper 14 that was last printed by the print head 21 is sent out from the paper outlet 23 to the upper surface of the body 11. is cut along the blade-shaped portion 24. Note that when the recording paper 14 is cut, the leading edge 14a of the recording paper 14
faces the tip of the blade-shaped portion 24 and the end surface of the opening/closing end 29 of the lid body 25.

Next, when the lid 25 is opened to check the presence or absence of the recording paper 14 and the remaining amount, as shown in FIG.
3 moves upward, the switch 32 is switched from on to off, and when the switch 32 is turned off, the opening of the lid 25 is detected, and the reverse feed control section of the control circuit inside the machine body 11 rotates the feed roller 16. A reverse rotation signal is output to the driving motor for a predetermined period of time.

By driving the feed roller 16 in reverse rotation for a predetermined period of time (in the direction of the arrow in FIG. 2), the recording paper 14 is reversely fed by a predetermined length and slackened toward the roll section 15, and the leading edge 14a of the recording paper 14 is from the paper exit 23 position to the print head 21 and platen 22.
is pulled back to a position between.

Then, when the lid 25 is closed after confirming the presence or absence of the recording paper 14 and the remaining amount, the tip 14a of the recording paper 14 is closed.
is pulled back from the paper outlet 23, so the lid 2
The lid body 25 can be closed on the top surface of the machine body 11 without pressing down the leading end 14a of the recording paper 14 with the opening/closing end 29 of the recording paper 14.
4 normal feeding operation is performed.

[Effect of idea]

According to the present invention, when the detection unit detects that the lid body is opened, the reverse feed control unit causes the recording paper to be reversely fed and the leading edge of the recording paper is returned from the paper outlet into the machine body. When the lid is opened and then closed to check the amount remaining, the edge of the lid does not push the leading edge of the recording paper into the back of the lid, ensuring that paper jams are prevented. This allows normal feeding of the recording paper during subsequent printing operations.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of the printing device of the present invention, FIG. 2 is a cross-sectional view of the printer with its lid open, and FIG.
FIG. 4 is a sectional view of a conventional printing device, and FIG. 5 is a sectional view of the conventional printing device with its lid in an open state. 11... Aircraft, 14... Recording paper, 16, 17...
...Feed roller, 20...Printing section, 23...Paper exit, 25...Lid body, 31...Detection means of the detection section.

Claims (1)

[Scope of Utility Model Registration Claim] A machine body in which a roll of recording paper is arranged, a feeding roller that sends out the recording paper, a printing section that prints on the recording paper sent out by this feeding roller, and a machine body that prints from this printing section on the recording paper sent out by the feeding roller. A paper outlet provided on the outer surface of the machine from which recording paper is sent out; a lid that forms the edge of the paper outlet and is provided on the machine so that it can be opened and closed; and a detector that detects the open state of the lid. and a reverse feed control unit that outputs a signal to reversely rotate the feed roller for a predetermined period of time when the detection unit detects the open state of the lid.