JPS621167Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a print medium feeding mechanism in a printer device.

In an inserter printer device that prints on media such as bankbooks and slips, when the media is inserted into an insertion slot, a sensor detects the printed line on the media, and the next line to be printed is automatically sent and set. When the printing process is completed, the medium is delivered to the insertion slot. FIG. 1 shows an outline of the printer device, in which a is a front view and b is a side view. Side frame 1A, 1
Rollers 2A, 2B, 2C, and 2D are fixed to the shafts 4A, 4B, and 4C supported between the shafts B, respectively, and the rollers 2A, 2B, 2C, and 2D are in contact with each other. By sandwiching the medium 10 between the rollers 2A, 2B, 2C, and 2D and rotating the shaft 4A, the medium 10 is transported along the pathway formed by the guide plates 6 and 7. The shaft 4B and roller 2B are driven by a motor (not shown) to be moved to the open position shown by the dotted line or to the closed position shown by the solid line. In conjunction with this opening and closing, the stopper 13 opens and closes the pathway. Therefore, when the medium 10 is inserted into the insertion port 12, the roller 2B is opened and the medium 10 is inserted until the leading end reaches the stopper 13 that closes the pathway. When the medium 10 is inserted, the roller 2B
is closed, the stopper 13 opens the pathway, and the shaft 4A is rotated to transport the medium. At this time, the sensor 11 detects, for example, a hyphen mark printed between the year, month, and day numbers in the first date column of the print line on the medium 10, and the line with this hyphen mark is regarded as a printed line. , the line to be printed this time is moved to the printing position. There, the shaft 4A stops. During this transfer, in order to prevent the leading edge of the medium 10 from jumping out of the pathway formed by the guide plates 8 and 9 due to curling of the medium 10 after passing the rollers 2C and 2D and being fed into the print head 5 side, The guide plate 9 slides up to the state shown by the dotted line. The guide plate 9 that has been slid up slides down and returns to its original position at the same time as the rollers 2C and 2D stop. Once the medium 10 is set in a predetermined position, the print head 5 is moved from side to side by a carriage (not shown), and then
The platen 3 and the medium 10 are protruded so as to be sandwiched therebetween, and printing is performed via an ink ribbon. When printing within one line is completed, the print head 5 returns to the home position, performs line feed by rotating the shaft 4A, and prints again as described above. When all printing is completed in this way, the print head 5 returns to the home position, and the medium 10 is moved between the rollers 2A, 2B, 2
C, 2D to the insertion port 12, and the medium 1
When the tip of the 0 reaches the stopper 13, the transfer is stopped. Then, the stopper 13 closes the pathway and the roller 2B becomes open. Therefore, the printed medium 10 can be taken out from the insertion slot 12. In such a device, when inserting the medium 10 into the insertion port 12, the side surface of the medium 10 abuts against the side walls of the guide plates 6 and 7 so that the initial printing position is always at a predetermined position. . However, if you are not careful when setting it up, it will move away from the side wall, resulting in the initial printing position being misaligned. Particularly, when the printing position on the medium 10 is determined in advance, there is a problem that printing errors may occur due to printing misalignment.

Conventionally, such a medium feeding mechanism uses a mechanism shown in FIG. 2, in which a1 and a2 are plan views of conical rollers, and b1 and b2 are plan views of clampers. A1 and a2 are provided with conical rollers 14A and 14B formed of a soft material so as to face each other with the medium 10 in between, and are interlocked with the opening and closing of the aforementioned roller 2B, and the rollers 14A and 14B
The medium 10 is sandwiched between the two. medium 1
When set to 0, it is open, but medium 10
At the same time as the setting is completed, the discs are closed, and the tips 14A', 14B' of the conical rollers 14A, 14B pinch the medium 10 and deform it into a2, becoming 14A'', 14B''. This deformation allows the side surface 10' of the medium 10 to be moved so as to abut against the side wall 6' of the guide plates 6, 7. Therefore, when the medium 10 is inserted, even if the medium 10 is not abutted against the side wall 6' of the insertion opening 12, the conical rollers 14A and 14B can align the medium 10 at a predetermined position at the same time as the roller 2B is closed. b1 and b2 are provided with clampers 15A and 15B rotatably held by a shaft 16 so as to face each other with the medium 10 in between, and are interlocked with the closing and opening of the roller 2B as described above, so that the clampers 15A and 15B The medium 10 is sandwiched therebetween. When the medium 10 is set, it is open, but as soon as the setting of the medium 10 is completed, it is closed, and the medium 10 is clamped at the arrow points A' and B' of the clampers 15A and 15B. This clamping force is caused by moment force acting around the shaft 16, so that the clampers 15A and 15B are rotated in the directions of arrows A and B, respectively. As a result, as shown in b2, the medium 1 sandwiched between the clampers 15A and 15B
The side surface 10' of 0 can be moved so as to abut against the side wall 6'. With this configuration, medium 10
can be moved to a predetermined position, but the former has a limited amount of movement, and is good if the deviation is small, but
If the amount of deviation is large, it may not be possible to move it to the specified position, and the rear rollers 2A, 2B,
When the rollers 2C and 2D are rotated and the medium 10 is transferred, the clampers 15A and 15B need to be opened, and an opening mechanism is provided separately from the closing and opening of the roller 2B, which has the drawback of complication.

The purpose of the present invention is to eliminate the above-mentioned problems, and in such a media feeding mechanism, at least one of the roller sets is held by a universal joint movable in the X and Y directions, and a motor for opening and closing is driven. Accordingly, the roller set is made to swing in a predetermined direction horizontally to the left and right with respect to the printing medium transport direction.

The present invention will be described in detail below with reference to the accompanying drawings. FIG. 3 shows a perspective view of the media feeding mechanism according to the present invention. A roller 2B provided so as to come into contact with a roller 2A fixed to a shaft 4A is held by the shaft 4B, and the shaft 4B is further supported by an arm 21. One end of this arm 21 is rotatably attached to the frame side via a universal joint 20, and the universal joint 20 is composed of rotary pins 20A and 20B. They are each swingable in the X direction.
The tip 21' at the other end is locked to a spring 22 stretched from a lever 23 fixed to a drive shaft of a motor 24 via a guide 1C. Guide 1C
is fixed to the frame 1, and when the motor 24 is rotated, the lever 23 is rotated, and the arm 21 can be swung along the guide 1C by the tension of the spring 22. FIG. 4 is an explanatory diagram showing the swinging steps of the rollers by . This is a case where the roller 2B is open and the medium 10 is inserted between the guide plates 6 and 7. In this case, the tension of the spring 22 is applied in the direction shown by the arrow E1, the tip 21' of the arm 21 is located at the corner of the a and d surfaces of the guide 1C, and therefore the roller 2B supported by the arm 21 is remains open. 〓 is a case where the roller 2B operates to close upon completion of insertion of the medium 10. In this case, the tension of the spring 22 acts in the direction of arrow E2, the tip 21' moves upward along the a plane of the guide 1C, and is located at the corner of the a and b planes, and the roller 2B holds the medium 10. I can do it. The tension of the spring 22 acts in the direction of arrow E3, the tip 21' moves along the b plane of the guide 1C, and the side surface 10' of the medium 10 held is brought into contact with the side wall 6'. Further, due to the action of the tension of the spring 22 in the direction of the arrow E3, the tip 21' separates from the b-plane and falls into the convex portion along the c-plane.
As a result, the rollers 2A and 2B are closed while holding the medium 10 between them. Since the medium 10 is transferred in this state, the medium 10 can be transferred while always being in contact with the side wall 6'. This is a case where after printing is completed, the medium 10 is ejected and the roller 2B is opened. In this case, the tension of the spring 22 is arrow E4
The tip 21' moves downward along the c-plane and is lowered down the roller 2B. is the case when the opening is completed, and the tension of the spring 22 is as shown by arrow E.
Acting in five directions, the tip 21' is located at the corner of the C and A planes, and maintains the rollers 2A and 2B in an open state.

The state returns to the following state and the same operation is repeated. Therefore, the medium 10 is inserted into the guide plate 6,
Even if it is done without hitting the side wall 6' of 7,
When the roller 2B closes, the side surface 1 of the medium 10
Transfer is performed with the end 0' abutting against the side wall 6'.

As explained above, in the present invention, the roller 2B is held by the universal joint 20, and is linked to the motor 24 that opens and closes the roller 2B, and upon closing, moves the roller 2B horizontally to remove the medium 1
It is designed to be held in place. As a result, the medium 10 can be always set at a predetermined position and transported, thereby preventing the printing position from shifting.

[Brief explanation of drawings]

Fig. 1 is a front view of the printer device, b is a side view, Fig. 2 is a plan view of conventional media feeding mechanisms a1 and a2 with conical rollers, b1 and b2 are a plan view of clampers, and Fig. 3 is a plan view of the printer device. FIG. 4 is a perspective view of the invented medium feeding mechanism, and is an explanatory diagram of the swinging steps of the roller. In the figure, 2A and 2B are rollers, 6 and 7 are guide plates, 20 is a universal joint, 21 is an arm, and 22
23 is a spring, 23 is a lever, 24 is a motor, 1 is a frame, and 1C is a guide.

Claims (1)

[Claims for Utility Model Registration] A guide for forming a printing medium transport path, a roller set protruding into the transport path, and a drive source for closing or opening the roller set, the roller In a medium feeding mechanism that transports the print medium along the guide by rotationally driving a roller set, an arm that holds a roller shaft of at least one roller of the roller set is connected to one end of the arm. a swingable universal joint, and
The drive source includes a lever that is rotated and a spring that is stretched around the lever so that the direction of tension changes as the lever is rotated. a guide member that guides the other end of the arm, and the guide member closes or opens the roller, and when the roller is in the open state, the roller moves and positions the print medium. A medium feeding mechanism characterized in that it is configured to guide the other end of the arm that moves under the tension of the arm.