JPH04138277A - Printer - Google Patents

Abstract

PURPOSE:To easily take a measure when paper jamming is generated by locking a movable part in a support part at the time of the closure of the movable part and releasing the locking of the movable part when paper jamming is detected to open the movable part. CONSTITUTION:At the time of the closure of a movable part 3, the hook 8 of the movable part 3 is engaged with the hook 9 of a support part 2 to lock the movable part 3 in the support part 2. In a feed route A, for example, when receipt paper 5 is involved in a printing head 3f performing linear reciprocating motion during the printing of the receipt paper and the printing head 3f is stopped, paper jamming is detected by a paper jamming detection circuit 6 and a solenoid driving circuit 10 drives a solenoid 11 on the basis of the detection signal and, at the same time, the hook 9 is revolved to be detached from the hook 8. By this constitution, the locking of the movable part 3 is released and the movable part 3 is drawn by a spring 7 to be opened. By this method, a measure can be easily taken when paper jamming is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printer that uses a roll of paper as a printing medium.

Conventional Technology In general, printers such as receipt/journal issuing printers installed in conventional PoS terminals have a movable part equipped with a print head etc. that is rotatably attached to one end of the device. By rotating this movable portion upward, the paper conveyance path is exposed. If a paper jam occurs, the upper part is rotated to remove the paper on the conveyance path.

Problems to be Solved by the Invention In such a printer, the movable part is formed to be openable and closable. Therefore, when the printer is moved or when the operator comes into contact with the movable part, the movable part may become half-open, and if printing is performed in this state, there is a risk of paper jams. be.

Means for Solving the Problems In a printer equipped with a movable part which is disposed on a support part so as to be freely openable and closable and faces the support part while sandwiching the conveying path of a roll of paper when the movable part is closed, when the movable part is closed, this A locking means for locking the movable part to the support part, a paper jam detection means for detecting a paper jam in the conveyance path, and an lock release means for releasing the lock by the locking means based on a detection signal from the paper jam detection means. and movable part opening means for opening the movable part when the lock is released by the lock releasing means.

The movable part, which is disposed in the support part so as to be openable and closable, and which faces the support part while sandwiching the conveyance path of the rolled paper when the movable part is closed, is locked to the support part by the locking means when the movable part is closed, thereby preventing paper jams in the conveyance path. When a paper jam is detected by the paper jam detection means, the lock is released by the lock release means and further released by the movable part release means.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 5. This printer 1 is a receipt/journal issuing printer used in a PO8 terminal.
As shown in FIG. 2, a movable part 3 is disposed on a support part 2 via a rotation shaft 4 so as to be openable and closable.

However, there is a receipt paper insertion slot 2a in the upper part of the support part 2.
A receipt outlet 3a and a journal outlet 3b are formed on the front surface of the movable part 3.

Furthermore, as shown in FIG. 3, the movable section 3 has a print head 3f connected to the motor 3e via a guided roller 3C and a drive belt 3d inside thereof, facing the support section 2. A pair of paper conveyance rollers 3g for conveying a roll of receipt paper 5 are disposed adjacent to the receipt discharge port 3a, and a cutter 3h is disposed on the side adjacent to the receipt discharge port 3a. has been done.

However, a paper jam detection circuit 6 serving as paper jam detection means is connected to the motor 3e.

The paper jam detection circuit 6 detects the occurrence of a paper jam when the rotation of the motor 3e is stopped even though a drive signal is applied to the motor 3e.

Further, an ink ribbon cassette 2c is detachably attached to the upper surface of the front side of the support section 2.

However, the movable section 3 is positioned so as to face the support section 2 across the transport path A of the receipt paper 5 when the movable section 3 is closed.

Furthermore, as shown in FIG. 1, the upper surface of the support section 2 is connected to the end of the upper surface of the movable section 3 closer to the rotation axis 4 via a spring 7 as a means for opening the movable section. ,
A hook 8 is formed at the lower part of the movable part 3. Further, a hook 9 rotatably supported by a rotation shaft 9a is disposed inside the support portion 2, and a hook 9 of the hook 9 is located on the opposite side of the rotation shaft 9a. At the end of the solenoid 11 connected to the solenoid drive circuit 10
A plunger lla is connected to the plunger lla. Further, the other plunger 11b of the solenoid 11 is connected to the inner surface of the support portion 2 via a spring 12.

However, the solenoid drive circuit 10 controls the solenoid 11 based on the detection signal from the paper jam detection circuit 6.
It is what drives the.

Further, the lock means is formed by the hook 8 and the hook 9, and the lock release means is formed by the solenoid drive circuit 10, the solenoid 11, the plunger lla, the plunger 11b, and the spring 12. It is something that

In such a configuration, when the movable part 3 is closed, its hook 8 is caught by the hook 9 of the support part 2, thereby locking the movable part 3 to the support part 2 (see FIG. 4).
.

Further, in the conveyance path A, if the receipt paper 5 is caught in the print head 3f that performs a linear reciprocating motion while printing a receipt and the print head 3f stops, the paper jam detection circuit 6 detects the paper jam. The solenoid drive circuit 10 drives the solenoid 11 based on the detection signal, and at the same time, the hook 9 rotates and is removed from the hook 8. As a result, the movable part 3 is unlocked.

At this time, the movable part 3 is pulled open by the spring 7 (see FIG. 5).

In this way, when a paper jam occurs, the movable section 3 automatically opens, so that even if the operator is not familiar with the operating method, he or she can easily deal with the occurrence of a paper jam.

Furthermore, when the movable section 3 is closed after removing receipt paper jammed on the conveyance path A, the hook 8 of the movable section 3 is caught and locked by the hook 9 of the support section 2, so that the printer 1 can be locked. The movable part 3 does not become half-open during movement or when it comes into contact with the outside, and the movable part 3
It is possible to prevent paper jams caused by the half-open state of the paper.

Although this embodiment has been explained using a printer for issuing receipts/journals, the present invention is not limited to this, and can be implemented in the same way for all printers that use roll paper as the printing medium. be.

Effects of the Invention As described above, the present invention provides a printer including a movable part that is disposed on a support part so as to be openable and closable and faces the support part across the transport path of a roll of paper when the movable part is closed. a locking means for locking the movable part to the supporting part when the movable part is closed; a paper jam detection means for detecting a paper jam in the conveyance path; and a locking means for releasing the lock by the locking means based on a detection signal from the paper jam detection means. Since the lock release means and the movable part release means for opening the movable part when the lock is released by the lock release means are provided, the movable part is locked to the support part by the lock means when the movable part is closed, thereby preventing paper jams in the conveyance path. When a paper jam is detected by the paper jam detection means, the lock is released by the lock release means and further released by the movable part release means.

That is, when a paper jam occurs, the movable part automatically opens. Therefore, even if the operator is not familiar with the operating method, it is possible to easily deal with paper jams when they occur. In addition, since the movable part is locked when it is closed, the movable part will not become half-open when the printer is moved or comes into contact with the outside, and this will prevent the movable part from becoming half-open. Paper jams can be prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing an automatic opening mechanism in an embodiment of the present invention, FIG. 2 is a perspective view of the printer, FIG. 3 is a longitudinal side view showing its printing mechanism and paper conveyance path, and FIG. 5 is a longitudinal side view showing the printer when the movable part is closed, and FIG. 5 is a longitudinal side view showing the printer when the movable part is open. 1... Printer, 2... Support part, 3... Movable part,
6... paper jam detection means, 7... movable part release means,
8, 9...Lock means application Person Tokyo Electric Co., Ltd. Above diagram

Claims (1)

[Claims] In a printer comprising a movable part that is disposed in a support part so as to be openable and closable and faces the support part while sandwiching a conveyance path of a roll of paper when the movable part is closed, the movable part is moved to the support part when the movable part is closed. a locking means for locking, a paper jam detection means for detecting a paper jam in the conveyance path, a lock release means for releasing the lock by the lock means based on a detection signal from the paper jam detection means, and a lock by the lock release means. A printer comprising a movable part opening means for opening the movable part when released.