JPH01317934A - Paper delivery device - Google Patents

Abstract

PURPOSE:To enable the grip power of paper to be set at an optimum value automatically only by designating the kind or the size of paper, by providing a memory at which pressurization force data most suitable for the kinds or the sizes of a variety of paper sheets are memorized. CONSTITUTION:When paper data such as the kinds or the sizes or the like or paper sheets are inputted at a controller, pressurization force data in opposition to the paper data are selected by means of a selection means 58 out of pressurization force data previously memorized at a memory 48, on the basis of this inputted data. The pressure of a pressurizing roller 70 against a drive roller 78 is set at an optimum value on the basis of the selected pressurization force data. As a result, the grip power of paper by both rollers 70, 78 can be set at a proper value, and paper can be delivered surely to a predetermined direction by the rotation of the drive roller 78.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper feeding device used in a paper-driven automatic drafting machine or the like.

[Conventional technology]

This type of paper feeding device is shown in Japanese Utility Model Application Publication No. 128092/1983.

In this conventional device, as shown in FIG. 5, a swinging arm 72 supporting a pressure roller 70 is biased counterclockwise about a shaft 74 by a tension spring 76, and a pressure a-rough 0 is applied to a drive roller 78. is forcing it on.

[Problem that the invention attempts to solve]

In the conventional device described above, the paper gripping force of the pressure roller 70 and the drive roller 78 is constant due to the elasticity of the spring 76.
Therefore, depending on the type and/or size of the paper, the gripping force is too strong, which may damage the paper or cause misalignment in paper feeding.The purpose of the present invention is to eliminate the above-mentioned defects. It is something to do.

[Means to solve problems]

In order to achieve the above object, the present invention provides an apparatus in which a pressure roller is pressed against a drive roller, and the paper sandwiched between the drive roller and the pressure roller is sent in a predetermined direction by rotation of the drive roller under the control of a controller. A pressure adjusting means for changing the pressure applied by the pressure roller to the drive roller is provided, and the controller includes a memory storing optimum pressure data corresponding to the types and/or dimensions of various types of paper, and selection means for selecting the pressurizing force data corresponding to the type and/or dimension data, and setting the pressurizing force of the pressurizing force adjusting means based on the selected pressurizing force data. This is what I did.

[Effect]

In the above configuration, when paper data such as paper type and/or dimensions is input to the controller, the pressure force data most suitable for the paper is selected, and the pressure of the pressure roller against the drive roller is adjusted based on this pressure force data. Set to the optimal value. As a result, the gripping force of the paper by both rollers is set to an appropriate value, and the paper is accurately fed in a predetermined direction by the rotation of the drive roller.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes a paper mounting member fixed to the body 3 of the automatic drafting machine, and as shown in FIG. It is arranged so that it can rotate freely.

Reference numeral 6 denotes a Y rail, which is disposed diagonally above and parallel to the drive roller 4.

A bracket 8 is attached to the Y rail 6 so as to be slidable along it.

Reference numeral 10 denotes a swinging arm, and a shaft 12 is supported at a substantially middle portion of the swinging arm to be rotatable on the body 3 about an axis parallel to the drive roller 4, and a pressure roller 14 is mounted at the tip of the arm 10.
is supported by a shaft 16 so as to be rotatable about an axis parallel to the drive roller 4.

The pressure roller attachment of the arm 10 is located between the end opposite to the side and the rotation center of the arm 10, and the swing arm 10 has a shaft 18 that rotates in a right angle direction. The shaft body 18 is freely supported, and is loosely fitted into a hole formed in the projecting piece of the bracket 8.

A molding 20 and a rotation stopper nut 22 fixed to the molding 20 are screwed into the threaded portion formed on the shaft body 18, and are located between the lower surface of the molding 20 and the upper surface of the protruding piece of the bracket 8. A coil spring 24 fitted into the shaft body 18 is compressed.

Reference numeral 30 denotes a guide cylinder provided upright on the upper surface of the projecting piece of the bracket 8. A slide groove 32 of a predetermined width is bored in the # direction on both sides of the inner wall surface of the guide tube, and the nut 22 is inserted into the groove 32.
Projecting pieces protruding from both sides are slidably fitted in the axial direction. Reference numeral 34 denotes a stopper fixed to the upper end of the guide cylinder 28, and a reference position detection sensor 36 consisting of a limit switch is disposed on this stopper so as to be located on the upward locus of the nut 22 along the groove 32. There is. 38 is a stepping motor fixed to the body 3 of the automatic drafting machine via a bracket, and a gear 40 is fixed to the output shaft of this stepping motor.
It meshes with 2. Reference numeral 26 denotes a pressure roller vertical cam, which is rotatably disposed at a fixed position on the upper surface of one end of the swing arm 10 by operating a lever (not shown) or by a drive device (not shown).

The stepping motor 38 is connected to a controller built in the body 3 of the automatic drafting machine, and the controller is configured to:
It includes an operation panel 44 and is configured to be connectable to a host computer 46 via an interface.

In the memory 48 of the controller, optimal gripping force, ie, pressing force data for paper corresponding to the type and size of the paper is stored in advance in a table form.

The input shaft of a pulse encoder 50 is connected to the output shaft of the stepping motor 38.
A pulse output terminal of is connected to a pulse counter 54 which is connected to a difference detection comparator 52.

Next, the operation of this embodiment will be explained.

The shaft body 18 is rotated by the elastic force of the coil spring 24.

The swinging arm 10 is urged upward in FIG. It is in bullet contact. When the cam 26 is rotated by a drive device or lever operation and its eccentric enlarged portion presses one end of the swinging arm 10 downward, the swinging arm 10 swings clockwise about the shaft 12, and the pressure roller 14 is separated from the drive roller 4 for a predetermined period. In this state, the paper 28 is inserted between the rollers 4 and 14, and the paper 18 is placed on the paper placement member 2. Next, when the cam 26 is rotated in the pressing force release direction to release the pressing force of the cam 26 against the arm 1o, the arm 10 is swung counterclockwise about the shaft 12 by the elastic force of the coil spring 24. Pressure arm 14
comes into elastic contact with the drive roller 4 from above the paper 28. Next, when the drive roller 4 is driven to rotate in the forward and reverse directions, the paper 28 is moved from side to side in FIG. Move along the top surface of 2. When the shaft body 18 is rotated to lower the molding 20, the coil 24 is compressed and the repulsive force increases,
On the contrary, when the shaft 18 is rotated in the opposite direction to raise the molding 20, the length of the coil spring 24 is lengthened and the repulsive force is reduced. However, the gripping force of the paper 28 with the pressure roller 4 is reduced.

Next, the above-mentioned automatic adjustment operation of the grip force is shown in Figs. 3 and 4.
This will be explained with reference to the figures.

First, after setting the paper 28 in the automatic drafting machine, the operator operates the operation panel 44 based on the message displayed on the display section of the operation panel 44, and specifies the type and size of the paper in an interactive manner ( Block 1). This designation data is input to the pressing force selection circuit 58 via the OR circuit 56. The selection circuit 58 reads out pressure force data most suitable for the paper to be used from the memory 48 based on the specified data, and inputs this data to the rotation speed selection circuit 60. On the other hand, when the type and size of the paper to be used is specified on the operation panel 44, the controller supplies a drive signal to the motor driver 62 to drive the stepping motor 38.
is driven to raise the molding 20, and when the top surface of the nut 22 is detected by the sensor 36, the stepping motor 38 is stopped, the molding 20 is set to the reference position, and the counter 54 is reset to zero. (Block 2).

The rotation speed selection circuit 60 converts the pressurizing force data into rotation speed data of the stepping motor 38.

This rotation speed data is input to the difference detection comparator 52. The difference detection comparator 52 outputs the difference between this rotational speed data and the rotational speed data from the counter 54, and the motor driver 62 drives the stepping motor 38 based on this differential output. This stepping motor 3
8, the molding 20 is lowered along the shaft 18, the coil spring 24 is compressed, and the paper grip force is increased. The rotational movement of the output shaft of the stepping motor 38 is converted into a pulse signal by a pulse encoder 50, and this pulse is counted by a counter 54.
The pulse count value of 4 is fed back to the difference detection comparator 52 as rotation speed data, and when the fed-back rotation speed data matches the rotation speed data output from the rotation speed selection circuit 60, the driving of the stepping motor 38 is stopped. Then, the grip force of the paper is set to an optimal value (block 3).Next, the controller controls the rotation of the drive roller 4 to automatically perform the initial setting of the paper (block 4). .

In the above embodiment, the paper type and size data are input to the controller of the automatic drafting machine by operating the operation panel of the controller of the automatic drafting machine, but they may also be input using the output of the host computer 46. The input method is not particularly limited.

〔effect〕

As mentioned above, the present invention stores in advance the optimal pressure roller pressure according to the paper type and/or size, so that it is automatically applied just by specifying the paper type and/or size. Another advantage is that the paper grip force can be set to an optimal value.

[Brief explanation of the drawing]

1 is a side view, FIG. 2 is an external view, FIG. 3 is a flowchart, FIG. 4 is a block diagram, and FIG. 5 is a conventional side view. 2...Paper placement member, 3...Body, 4...Drive roller, 6...Y rail, 8...Bracket, 10...
... Swinging arm, 12... Shaft, 14... Pressure roller, 16... Shaft, 18... Shaft body, 20... Molding,
22...Nut, 24...Coil spring, 30...
Guide tube, 32...Groove, 34...Stopper, 36
...Sensor, 38...Stepping motor, 40.
... Gear, 44 ... Operation panel, 46 ... Host computer, 48 ... Memory, 50 ... Pulse encoder, 52 ... Comparator, 54 ... Counter, 70 ... Pressure roller , 72... swinging arm, 74
...Axis, 76...Tension spring, 78...Drive roller, Patent applicant: Muto Kogyo Co., Ltd. Representative Patent Attorney Aya Nishijima Figure 1, 3rd, Figure 2, Figure 3

Claims (1)

[Claims] (1) In an apparatus in which a pressure roller is pressed into contact with a drive roller, and the paper sandwiched between the drive roller and the pressure roller is sent in a predetermined direction by rotation of the drive roller under the control of a controller, the drive of the pressure roller A pressing force adjusting means for changing the pressing force on the roller is provided, and the controller includes a memory storing optimum pressing force data corresponding to various paper types and/or sizes, and paper type and/or size data. a selection means for selecting the pressurizing force data corresponding to the data based on the pressurizing force data, and setting the pressurizing force of the pressurizing force adjusting means based on the selected pressurizing force data. Device.