JPH0494351A - Sheet-shaped member feeding positioning device for card and sheet for printing/copying and the like - Google Patents

Abstract

PURPOSE:To stop a sheet-shaped member promptly and accurately at a preset feeding position by providing a roller separating means for separating a pressure roller from a driving roller according to the detection output of a sensor. CONSTITUTION:A roller separating means 14 for separating a pressure roller 5 from a driving roller 4 according to the detection output of a sensor 16, is provided, and under a condition where the pressure roller 5 is separated, since the frictional power between a sheet-shaped member 2 and a guide member 1 is larger than that between the sheet-shaped member 2 and the driving roller 4, the sheet-shaped member 2 is stopped. The sheet-shaped member 2 can thus be stopped at a preset feeding position promptly and accurately, without stopping a driving motor, based on the difference in the frictional power between the sheet-shaped member 2 and the guide member 1, and that between the sheet-shaped member 2 and the driving roller 4, due to the separational operation of the pressure roller 5.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applied to cards used in time recorders, printers, copying machines, etc., for positioning the feeding of time cards, printing paper, copying paper, etc., printing/copying paper, etc. The present invention relates to a sheet-like member feeding and positioning device.

[Prior Art] Conventionally, as this type of sheet-like member feeding and positioning device for cards, printing/copy paper, etc., the sheet-like member is held between a drive roller and a pressing roller, and the drive roller is driven by a stepping motor or a pressure roller. There are known devices that are driven and stopped by a servo motor or a DC motor.

As shown in FIG. 5, in a device using a stepping motor, a sheet-like member 51 such as printing/copying paper is pressed by a driving roller 53 which is driven by a stepping motor 52 serving as a driving motor and a pressing roller placed opposite the driving roller 53. It is held between the rollers 54 and run along the guide member 55, for example,
The sensor 56 detects the reference position of the sheet-like member 51, for example, the front end of the sheet-like member 51, and adjusts the distance from the reference position to a predetermined feeding position. The control circuit 5
7 to the stepping motor 52, the driving roller 53 is rotated and stopped in accordance with the input signal, and the sheet-like member 51 is stopped at the corresponding feeding position, thereby determining the feeding position of the sheet-like member 51.

The pressing roller 54 is rotatably supported by the other end of an arm member 58 that rotates about one end as a fulcrum.
The sent member 51 is pressed against the drive roller 53 by a spring member 59 that biases the member to rotate.

In addition, in the figure, 60 is a belt that transmits the rotation of the stepping motor 52 to the drive roller 53.

As shown in FIG. 6, the one using a servo motor controls the feeding position of the sheet-like member 51 in conjunction with a sensor 56.
An encoder 62 detects the amount of rotation of a servo motor 61 forming a drive motor, and the detection output is fed back to the servo motor 61 via a control circuit 63, thereby controlling the servo motor 61 to control the sheet member 51. The feed positioning is done in this way.

In addition, in the case of using a DC motor, a sensor is provided at the stop position of the sheet-like member, and the DC motor is stopped according to the detection output of the sheet-like member by this sensor to determine the feeding position of the sheet-like member. There is.

[Problems to be Solved by the Invention] Incidentally, in the conventional sheet-like member feeding and positioning device for cards, printing/copy paper, etc., the stepping motor 52 and servo motor 61 used therein are themselves expensive. In addition, when the stepping motor 52 is used, complex control such as so-called trapezoidal control is required to start or stop the motor gradually, respectively, in order to prevent step-out. Even when the servo motor 61 is used, an encoder 62, a feedback circuit, etc. are required, and the device and circuit become complicated, which poses a problem.

On the other hand, in the case of a DC motor, although it is not expensive per se, in order to stop the motor instantaneously when detected by a sensor, the DC motor is slowed down before the stop position, and a sudden electric current is generated at the stop position. In this case, the control circuit is complicated and expensive, and there are problems.

In this way, in any case, only the pressure roller 54 and drive roller 53 require complicated motor control.
The problem lies in the fact that inertial rotation of the motor must be prevented when stopping the rotation of the motor in order to stop the sheet-like member 51 held between the two at a predetermined position.

The present invention has been made in view of the above conventional problems, and its purpose is to provide a device with a simple structure that does not require control of the motor itself, does not require complicated devices or control circuits, and
It is an object of the present invention to provide a sheet-like member feeding and positioning device for cards, printing/copy paper, etc., which can easily, quickly and accurately position the sheet-like member.

[Means for solving the problems 1 In the present invention, in order to solve the above conventional problems,
A guide member that contacts and guides a sheet-like member such as a card, printing/copying paper, etc., a drive roller that is rotationally driven by a drive motor, and a guide member that is arranged opposite to the drive roller and guides the sheet-like member. The driving roller and the pressing roller work together to sandwich the sheet-like member between the image rollers and make it run along the guide member and transport the sheet-like member. In a sheet-like member feeding and positioning device for cards, printing/copy paper, etc., in which the feeding position is detected by a sensor and the sheet-like member is fed to a predetermined position, the pressing roller is moved to the drive roller in accordance with the detection output of the sensor. A roller separating means is provided for separating the roller from the pressing roller, and when the pressing roller is in a separated state, the frictional force between the sheet-like member and the guide member is made larger than the frictional force between the sheet-like member and the drive roller. A card characterized by a structure in which the sheet-like member is stopped,
This paper proposes a positioning device for feeding and positioning a sheet-like member such as copy paper.

Furthermore, there has been proposed a structure in which the drive roller is disposed at a non-contact position with respect to the sheet-like member when the pressing roller is in a separated state when the sheet-like member is fed in a horizontal direction.

Furthermore, a structure is proposed in which the sheet-like member is provided with a friction applying means that is always pressed against the sheet-like member so as to constantly apply running resistance to the sheet-like member while the sheet-like member is running.

Furthermore, there has been proposed a structure in which a brake means is provided which moves as the pressing roller moves away and presses the sheet-like member against the guide member to suppress the traveling of the sheet-like member.

be done.

[Function] With the above configuration, the present invention is provided with a roller separating means for separating the pressing roller from the drive roller according to the detection output of the sensor, and in the separated state of the pressing roller, the sheet-like member and the guide The frictional force between the sheet-like member and the drive roller is made larger than the frictional force between the sheet-like member and the drive roller to stop the sheet-like member, so that the pressing force can be applied without stopping the drive motor. Due to the separation action of the rollers, the sheet-like member is quickly and accurately fed to its predetermined position based on the difference between the frictional force between the sheet-like member and the guide member and the frictional force between the sheet-like member and the driving roller. There is no need to take into account the inertial rotation caused by the stop of the drive motor (no complicated equipment or control circuit is required, and a device with a simple structure can easily feed a sheet-like member with good performance). Make positioning.

Further, when the feeding direction of the sheet-like member is horizontal, the driving roller is disposed at a non-contact position with respect to the sheet-like member when the pressing roller is in a separated state;
Furthermore, the sheet-like member is provided with a friction applying means that is always pressed against the sheet-like member so as to constantly apply running resistance to the sheet-like member while the sheet-like member is running. The structure includes a brake means that presses the sheet-like member against the guide member in conjunction with the separation operation to suppress the traveling of the sheet-like member. The feeding position of the sheet-like member can be stopped at a suitable feeding position.

[Embodiment] First, a first embodiment of a positioning device for feeding and positioning a sheet-like member such as a card, printing/copying paper, etc. according to the present invention will be described with reference to FIG.

In the figure, reference numeral 1 denotes a guide member, which is disposed with a pair of gaps above and below.
A sheet-like member 2 such as copy paper comes into contact with a guide surface 3 of a lower guide member 1 and is guided.

4 is a drive roller, 5 is a pressure roller, and in the middle of the guide member 1, the drive roller 4 is disposed below with a sheet-like member 2 interposed therebetween, and the pressure roller 5 is disposed above it, facing each other. .

The drive roller 4 is rotationally driven by a drive motor 6 such as a DC motor (direct current motor). Note that 7 is a belt that transmits the rotation of the drive motor 6 to the drive roller 4.

The suppression roller 5 is rotatably supported at the end of one arm 1) of an L-shaped two-arm arm member 10 that is rotatably supported by a support portion 9, and is rotatably supported by the end of one arm 1). 1) is rotated counterclockwise in the figure by a spring member 12, thereby pressing the sheet-like member 2 against the drive roller 4.

In such a pressed state, the sheet-like member 2 is held by the driving roller 4 and the pressing roller 5 in cooperation with each other and travels along the guide member I, and is transported, for example, in the direction indicated by arrow A in the figure. be done.

At the end of the other arm 13 of the arm member 10, a solenoid l:1 is installed.
When the solenoid 14 is activated and the plunger 15 is retracted, the arm member 10 rotates clockwise against the spring member 12, as shown by the chain line, and presses. The roller 5 separates from the drive roller 4 and constitutes a roller separating means.

In this state where the pressing roller 5 is separated, the sheet-like member 2
is only in contact with the drive roller 4, and the sheet-like member 2
The frictional force between the sheet-like member 2 and the guide member 1 is small compared to this frictional force.

Therefore, when the suppression roller 5 separates from the driving roller 4 and the sheet-like member 2, and the pressing state of the press roller 5 against the sheet-like member 2 is released, the sheet-like member 2
Based on the difference between the frictional force between the sheet-like member 2 and the guide member 1 and the frictional force between the sheet-like member 2 and the drive roller 4, the traveling of the sheet-like member 2 is suppressed and the sheet-like member 2 stops. become.

I6 is a sensor that detects the feeding position of the sheet-like member 2, and is attached to the guide member I, and in this embodiment, it detects the front end of the sheet-like member 2.

17 is a control circuit which operates the solenoid 13 according to the detection output detected by the sensor I6;
The pressure roller 5 is separated.

Note that when the pressing roller 5 is in the separated state, the drive motor 6
The solenoid 14 may be rotated continuously or may be stopped. In the case of stopping, the solenoid 14 is activated and the drive motor 6 is stopped in accordance with the detection output.

With the above configuration, a roller separating means for separating the pressing roller 5 from the driving roller 4 according to the detection output of the sensor 16 is provided, and when the pressing roller 5 is in a separated state, the friction force between the sheet-like member 2 and the guide member 1 is provided. is made larger than the frictional force between the sheet-like member 2 and the drive roller 4 to stop the sheet-like member 2, so that the drive motor 6
There is no need to take into account the inertial rotation of the motor when it stops (there is no need to control the motor itself, there is no need for complicated devices or control circuits, and for example, there is no need to take into account the inertial rotation of the motor when it stops). By using this, the sheet-like member 2 can be accurately fed and positioned with a device having a simple structure and low cost.

Next, a second embodiment will be explained based on FIG. 2.

In this embodiment, the drive roller 4 is arranged in a non-contact position with respect to the sheet-like member 2 when the pressing roller 5 is in a separated state shown by a solid line in the figure.

That is, the rotating circumferential surface of the drive roller 4 is positioned below the guide surface 3 of the guide member 1, and when the press roller 5 presses the sheet-like member 2 as shown by the chain line in the figure. It is pressed against the drive roller 4 in a manner that it is warped.

According to this configuration, when the pressure roller 5 is in the separated state,
Since there is no frictional force between the sheet-like member 2 and the drive roller 4, the frictional force between the sheet-like member 2 and the guide member 1 directly acts to stop the sheet-like member 2.

Next, a third embodiment will be described based on FIG. 3.

In the figure, reference numeral 31 denotes a leaf spring member constituting the friction imparting means, which is disposed between the guide members 1. Its base end is locked to the upper guide member 1, and its distal end is always in pressure contact with the sheet-like member 2, and while the sheet-like member 2 is running,
It is designed to provide constant running resistance. This results in
Frictional force is generated between the sheet-like member 2 and the leaf spring member 31, and the sheet-like member 2 is pressed against the guide surface 3 of the lower guide member 1. Frictional force increases.

Note that the pressing force of the leaf spring member 31 against the sheet-like member 2 or the accompanying frictional force between the sheet-like member 2 and the leaf spring member 31 and between the sheet-like member 2 and the guide member l. However, the size is such that there is no problem in transporting the sheet-like member 2 when the pressing roller 5 is pressed, which is shown by a solid line in the figure.

Next, a fourth embodiment will be explained based on FIG. 4.

In this embodiment, the arm member 41 is integrally formed into a three-arm inverted T-shape, and is placed on the opposite side of the arm 1) that supports the pressure roller 5 via the rotation support part 9. Extended arm 42
A brake part 43 is provided at the end of the guide member l, and by pulling the arm 13 clockwise with the plunger 15 of the solenoid 14, as shown by the chain line in the figure, the sheet-like member 2 is positively pushed against the guide surface 3 of the guide member l. It constitutes a brake means that presses the sheet-like member 2 in conjunction with the separation movement of the pressing roller 5.
We are trying to suppress the running of cars.

As a result, the frictional force between the sheet-like member 2 and the guide member 1 does not need to be considered to be large enough to cause no hindrance to the conveyance of the sheet-like member 2 when the pressure roller 5 presses the sheet-like member 2. , increases when the pressure roller 5 separates.

According to the second to fourth embodiments described above, the sheet-like member 2 can be quickly and accurately stopped at its predetermined feeding position, and furthermore, the first to fourth embodiments described above
Further effects can be expected by combining the respective embodiments. Further, the second embodiment is effective when the feeding direction of the sheet-like member 2 is horizontal, that is, when gravity does not apply to the feeding direction of the sheet-like member 2, and other embodiments The device according to the above can sufficiently cope with the case where the sheet-like member 2 is fed in either a horizontal or vertical direction, and in particular, the device according to the third and fourth embodiments can cope with the case where the sheet-like member 2 is fed in the horizontal or vertical direction. It is effective when it is perpendicular, that is, when it coincides with the direction of gravity.

Further, in each of the second to fourth embodiments described above, descriptions of structures similar to those of the first embodiment and similar effects are omitted.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the embodiments described above, and can be modified in various ways without changing the gist thereof.

[Effects of the Invention] As explained above, according to the sheet-like member feeding and positioning device for cards, printing/copy paper, etc. according to the present invention,
A roller separating means is provided for separating the pressing roller from the drive roller in accordance with the test output of the sensor, and when the pressing roller is in a separated state, the frictional force between the sheet-like member and the guide member is Since the friction force between the sheet-like member and the driving roller is greater than the friction force between the sheet-like member and the drive roller, and the sheet-like member is stopped, the separation action of the pressing roller can be performed without stopping the drive motor.
Based on the difference between the frictional force between the sheet-like member and the guide member and the frictional force between the sheet-like member and the drive roller,
A device that can quickly and accurately stop a sheet-like member at its predetermined feeding position, does not require consideration of its inertial rotation due to the stop of the drive motor, does not require complicated equipment or control circuits, and has a simple structure. This provides various effects such as easy and good feeding positioning of the sheet-like member.

Further, when the feeding direction of the sheet-like member is horizontal, the driving roller is disposed at a non-contact position with respect to the sheet-like member when the pressing roller is in a separated state;
Furthermore, the sheet-like member is provided with a friction imparting means that is always pressed against the sheet-like member so as to constantly apply running resistance (-1) while the sheet-like member is running; With a configuration including a brake means that presses the sheet-like member against the guide member to suppress the traveling of the sheet-like member in conjunction with the separation operation of the pressing roller,
- The sheet-like member can be quickly and accurately stopped at its predetermined feeding position, and good feeding positioning of the sheet-like member can be achieved.

[Brief explanation of drawings]

1 to 4 are longitudinal cross-sectional views of essential parts respectively showing first to fourth embodiments of a sheet-like member feeding and positioning device for cards, printing/copy paper, etc. according to the present invention, and FIGS. 5 and 6 FIG. 2 is a vertical cross-sectional view of a main part of a conventional device. 1... Guide member 2... Sheet-like member 4-
- Drive roller 5... Press roller 10... Arm member 14... Solenoid 31... Leaf spring member 43... Brake means Fig. 3 Fig. 4 Fig. 1 Fig. 2 Fig. 5 Fig. 6

Claims (4)

[Claims] (1) A guide member that contacts and guides a sheet-like member such as a card, printing/copying paper, etc., a drive roller that is rotationally driven by a drive motor, and a guide member that is arranged opposite to the drive roller and that guides the sheet-like member. A pressure roller that presses the sheet-like member is provided, and the sheet-like member is sandwiched between the two rollers and conveyed along the guide member by the cooperation of these drive rollers and the press roller, and the sheet-like member is conveyed by running along the guide member. In a sheet-like member feed positioning device for cards, printing/copying paper, etc., which detects the feed position of the sheet-like member using a sensor and determines the predetermined feed position of the sheet-like member, the pressing roller is moved in accordance with the detection output of the sensor. A roller separation means for separating the drive roller from the drive roller is provided, and when the pressing roller is in the separation state, the friction force between the sheet-like member and the guide member is reduced to the friction force between the sheet-like member and the drive roller. A card characterized in that it is made larger and the sheet-like member is stopped.
Positioning device for feeding sheet-like materials such as printing/copy paper. (2) The card according to claim 1, wherein when the feeding direction of the sheet-like member is horizontal, the driving roller is disposed at a non-contact position with respect to the sheet-like member when the pressing roller is in a separated state. Positioning device for feeding sheet-like materials such as printing/copy paper. (3) The card according to claim 1, further comprising a friction applying means that is always pressed against the sheet-like member so as to apply running resistance to the sheet-like member while the sheet-like member is running. Positioning device for feeding sheet-like materials such as printing/copy paper. (4) The card according to claim 1, further comprising a brake means that presses the sheet-like member against the guide member in conjunction with the separation operation of the pressing roller to suppress the traveling of the sheet-like member. - Positioning device for feeding sheet-like materials such as copy paper.