JPH1067445A - Gap adjusting mechanism of printing device for bankbook and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure automatic adjustment and fixation for latch and gap of an upper carrying guide by implementing a mechanism giving no change in a gap caused by an external force to the upper carrying guide by use of a bracket fixing the upper carrying guide, an elecromagnet, and a cam provided for a step motor. SOLUTION: In opening an image sensor 2, a switch is pushed to make uneffective the magnetic force of an electromagnet 13 keeping a sensor box 17 close to thereby enable it to be opened easily. When the box 17 is closed to a certain position, a sensor 11 detects it to blink a lamp 12 for informing an operator that the box 17 is closed, and the according to the detection a pulse motor 15 rotates a cam 16 to make a gap of an image sensor 2 a certain distance. The motor 15 fixes the cam 16 by the method at the time of exitation and restrain fluctuation in the size of gap generated by an external force. Accordingly, the mounting position of the image sensor can be determined accurately by the automatic adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a need to maintain a uniform gap in a conveyance path for conveying a form or the like, reading an image, etc., and uses a conveyance guide for removing paper jams and cleaning a conveyance system. This invention is highly useful for a form handling apparatus having a mechanism for opening and closing.

[0002]

2. Description of the Related Art The prior art is disclosed in Japanese Patent Application Laid-Open No. 5-405.
There is a mechanism as shown in FIG. 24, and efforts have been made in the means for setting the mounting position and height that greatly affect the sensor reading accuracy. However, the prior art described above requires a complicated mechanism, does not take into account gap variations due to external force, and is not easy to maintain.

[0003]

A form handling device used as a terminal of a bank or the like has functions such as printing on a form, writing and reading on a magnetic stripe, and character recognition. The function of (1) may degrade the quality of reading or the like due to an irregular conveyance path gap or a gap change due to an external force. Also, in the form handling apparatus, the form is liable to be jammed in the form due to its work, and in order to improve the usability, it is necessary to open and close the upper transfer guide which constitutes the transfer path. It causes fluctuation.

An object of the present invention is to provide a mechanism that satisfies the above different conditions.

[0005]

According to the present invention, a problem is solved by providing a latch structure for fixing the upper conveyance guide, a sensor for judging the position of the upper conveyance guide and a lamp for notifying the operator on the conveyance path side. doing.

Specifically, as a latch structure, a bracket for fixing the upper conveyance guide to a specific position, and a switch for selecting the presence or absence of a magnetic force of an electromagnet for automatically adjusting the position of the upper conveyance guide are provided on the bracket. An electromagnet capable of selecting the presence or absence of a magnetic force according to the above, and the above-mentioned sensor are provided in addition to a pulse motor that rotates by a required amount after a position of the upper conveyance guide is detected by the above-mentioned sensor and a cam associated therewith, etc.

By closing the upper transport guide, the above-mentioned mechanisms automatically and automatically perform the transmission to the operator by the ramp, the latch of the upper transport guide, the adjustment of the gap, and the fixing, thereby achieving the desired purpose.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described with reference to FIGS. FIG. 1 is a diagram showing a main part of an embodiment applied to a passbook printer of the present invention. In order to convey the medium 1 to the medium reading section immediately below the image sensor 2, the upper conveyance guide 4 and the lower conveyance guide 5 are arranged facing each other at a fixed interval.
The lower transport guide is fixed to a side frame (not shown).
In FIG. 1, the space surrounded by the upper and lower transport guides is called a transport path. Also, a set of transport rollers 7a,
7b, 7a ', 7b', 7a ", 7b", 7a "', 7
In order to move the medium 1 in the transport path by b ″ ′, the medium 1 is arranged as shown in the drawing, and is rotationally driven by a known driving technique. Further, an image sensor 2 for optically reading characters and marks printed on the medium 1 is disposed in front of the apparatus, and individual information of the medium 1 is read by the image sensor 2.
A conveying roller set 7 immediately below a print head 9 of a printing means including a print head 9 and a platen 10 arranged at the center of the apparatus.
The operation is performed in which the desired printing is performed on the medium 1 and then the medium 1 is ejected to the insertion slot.

In this embodiment, a guide plate 3 on the lower transport guide is further provided.
A sensor 11 for detecting the closed state of the image sensor unit, a lamp 12 for transmitting the state to the operator, an electromagnet 13 for holding the closed state of the image sensor unit, a switch 14 for switching the presence or absence of the magnetic force, a gap required for image reading accuracy A pulse motor 15 and a cam 16 for automatically adjusting are provided, and the image sensor unit is rotatably (open / closed) supported at the same position.

2 to 4, the structure and operation of the positioning mechanism of the image sensor 2 will be described. The image sensor 2 is fixed in a housing called a sensor BOX 17, and the sensor BOX 17 is a rotation fulcrum 1 provided on a side wall of the conveyance path.
8 is rotatable. Also, sensor B
A switch 14 for selecting the presence or absence of a magnetic force of the electromagnet 13 for maintaining the closed state of the sensor BOX 17 provided on the transport path side wall and a bracket 19 fixed by the magnetic force of the electromagnet 13 are fixed to the OX 17. Below the electromagnet 13, there is a cam 16, a pulse motor 15 for driving the cam 16,
The rotation of the pulse motor 15 causes the cam 16 to move the electromagnet 13 up and down.

Since the reading position (gap) of the image sensor 2 has a great influence on the reading accuracy, and also has an effect on the accuracy of paper transport, it is necessary to always maintain a constant gap and suppress the gap fluctuation due to external force. In addition, it is necessary to remove dust, dirt, and the like attached to the sensor reading unit when a failure such as a conveyance jam occurs in the image sensor 2 of the apparatus.

FIG. 3 shows an operation state when the image sensor is opened. When the image sensor 2 is opened, when the operator presses the switch 14 in the direction A, the magnetic force of the electromagnet 13 that has closed the sensor box 17 disappears, and the sensor box 17 is easily opened.

FIG. 4 shows an operation state when the image sensor is closed. When the maintenance is completed and the sensor box 17 is closed to a certain position by the operator, the sensor 11 detects and the lamp 12 is turned on or blinks to notify the operator that the sensor box 17 is closed. Upon detection of the sensor 11, the pulse motor 15 rotates the cam 16 in the B direction in the gap of the image sensor 2 to make the gap a constant distance. Further, the pulse motor 15 has a mechanism in which the cam 16 is fixed by a method at the time of excitation and the like, and the gap fluctuation due to the external force is suppressed, so that the image sensor 2 is accurately positioned and the gap does not fluctuate due to the external force.

[0014]

According to the present invention, the mounting position of the image sensor, which affects the reading accuracy of the image sensor, can be determined by automatic adjustment, and the gap fluctuation due to external force can be suppressed. This facilitates maintenance of the apparatus, such as cleaning of the sensor unit and the like, and accurate and automatic positioning of the image sensor afterwards.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of the present invention.

FIGS. 2A and 2B are a plan view and a side view showing an image sensor mounting portion shown in the claims; FIGS.

FIG. 3 is a side view showing an operation state when the image sensor shown in the claims is opened.

FIG. 4 is a side view showing an operation state when the image sensor is closed as shown in the claims.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Medium, 2 ... Image sensor, 3 ... Guide plate, 4 ... Upper conveyance guide, 5 ... Lower conveyance guide, 6 ...
Insertion port, 7: transport roller set, 8: print head, 9:
Platen, 11 sensor, 12 lamp, 13 electromagnet, 14 switch, 15 pulse motor,
16: cam, 17: sensor box, 18: rotation fulcrum, 19: bracket.

Claims (1)

[Claims] An apparatus provided with an upper and lower transport guide facing each other, which continuously forms an insertion slot and a transport path, and a mechanism for opening and closing the upper transport guide, for inserting and transporting a passbook, a slip, and the like. A mechanism for automatically adjusting a gap between the upper and lower transport guides each time the upper transport guide is opened and closed, and a gap that does not fluctuate even when an external force is applied to the upper transport guide; a bracket for fixing the upper transport guide and an electromagnet; And a gap adjustment mechanism for a passbook printing apparatus, which is achieved by a step motor and a cam attached to the step motor.