JPS59188624A - Automatic original feeding device of overhead projector - Google Patents

Abstract

PURPOSE:To execute automatically carrying and discharge of an original by button operation by providing a feed-out device provided with a motor for driving a feed-out roll, and a discharge device provided with a motor for driving a discharge roll, and providing a start switch for operating both motors. CONSTITUTION:The first and the second motors M1, M2 are connected in parallel to a power source 13, and a start switch 6 and a microswitch 7 are connected in parallel. In case of replacing an original 3, when an explainer turns on a start button 6 of an operating box which he has at hand, the first and the second motors M1, M2 starts to drive synchronously, and a feed-out roll 9 and a discharge roll 11 connected to said motors start to rotate simultaneously. In this case, the lowest original 3 among a lot of stored originals 3 is fed into the feed- out roll 9 by a feed roll 10 from a feed-out device 4 and a feeding part 8, the original is carried onto an original placing plate 2 from this feed-out roll 9, and at the same time, the discharge roll 11 discharges the projected original 3 to the outside of a machine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an overherad projector (-), and more particularly to an automatic document feeder that automatically feeds a document onto a document table.

[Prior art]

In the conventional OHP projector (hereinafter referred to as OHP), when explaining the content projected on the screen, the explainer or an explanation assistant manually replaces the OHP original one after another and explains at the same time. Because I was going
When the next document (-) is to be changed, the user's attention is focused on replacing the document, resulting in problems such as interruptions in the explanation, or the timing of replacement is delayed, making it difficult to explain smoothly.

[Purpose of the invention]

The present invention is intended to eliminate and improve the above-mentioned drawbacks of the prior art. An object of the present invention is to provide an OHP automatic document feeder that can automatically replace a document with the next document, thereby solving the above-mentioned problems.

[Structure of the invention]

The automatic document feeder for an OHP according to the present invention includes a feeder, which is provided with a feed roll and a first motor, and a feed roll and a second motor, respectively, at the front and back positions of a document table formed on the top surface of the main body of the OHP in the document transport direction. A discharge device equipped with a motor is provided, and the first and second motors are driven by a start switch to discharge the original on the document table by the discharge roll, and at the same time, the next document is placed on the document table by the delivery roll. The first and second motors are stopped by detecting passage of the document by a microswitch.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

1 and 2 show an OHP automatic document feeder, and the automatic document feeder of the present invention has an OHP main body (1
) The document (8) on the document table (2) on the upper surface of ), and a microswitch (7) that detects passage of the original (3) and stops the driving of the feeding device (4) and the ejecting device (5). .

The feeding device (4) includes a feeding unit (8) that stores a plurality of originals (8) and separates and feeds the originals one by one, and a feeding unit (8) that transports the fed originals (3) onto the original platen (2). The ejecting device (5) includes a ejecting roll α for ejecting the document (3) to the outside of the machine, and a first motor (Ml) for driving the ejecting roll (9). The second motor to drive (
Ml).

The feeding section (8) is a well-known device commonly used in copying machines and the like, and is equipped with a feeding roller αQ for separating and feeding the original documents (3) one by one.

In this embodiment, the starting switch (6) is provided in one operation box α for remote control pulled out from the 0I (P main body (1)), and the explainer holds these nine operation boxes at hand when starting the operation. The switch (6) can be operated.The microswitch (7) is installed near the delivery roll (9) in the OHP main body (1), and the microswitch (7) is installed near the delivery roll (9) in the OHP main body (1). In this embodiment, it is operated by being mechanically pressed by the weight of the document (8).

Next, the operation of an embodiment of the present invention will be explained using FIG. 8, which is an electric circuit diagram thereof.

The first and second motors (Ml) and (Ml) are powered by a power supply α1
A starting switch (6) and a microswitch (7) are connected in parallel to one connection terminal between these motors and the power source α).

When replacing the original (8), when the explainer turns on the start button (6) on the operation box 0 held at hand, the first and second motors (M, ) and (Ml) start. The driving starts synchronously, and the delivery roll (9) and delivery roll 0 connected to this start rotating at the same time.At this time, the delivery device (4) and the delivery roll from the feeding unit (8) Among the many manuscripts (3) stored by 00, the lowest manuscript (
3) to the delivery roll (9), and this delivery roll (
9), the original (3) is conveyed onto the original platen (2), and at the same time, the ejection roll αQ ejects the already projected original (8) out of the machine. 1. Also, during this time, the leading edge of the document (3) sent to the document table (2) passes over the microswitch (7), so the microswitch detects this, turns ONL, and the explainer presses the start switch α in the operation box. Even after the start switch is turned off by releasing the pressure in (6), the motor (Ml) and .

Since the microswitch is closed in the circuit between (Ml) and power supply 01), the motors (Ml) and (Ml) continue to rotate until the delivery roll (9) is completely replaced with the original (3). and discharge roll αη are driven.

When the end of the document (3) being conveyed onto the document table (2) passes over the microswitch (7), the microswitch (7) turns OFF and the circuit opens, causing the motor (Ml
) and (Ml) stop, and the delivery roll (9) and discharge roll 0υ stop rotating.

The above operations are automatically performed every time you turn on the start switch on the operation box, and the original (on which the explanation has been completed) is projected.
3) is ejected from the document table (2), and the next document is sent to the document table (2) and replaced.

〔Effect of the invention〕

The present invention has the above-described configuration, and the document can be automatically conveyed and ejected by pressing the button manually, so the operator can view the screen on the screen without having to worry about operating the projector. This has the effect of allowing you to focus on explaining the image.

[Brief explanation of the drawing]

'Figure 1 is an overall perspective view showing one embodiment of the present invention, Figure 2 is a perspective view of the entire embodiment of the present invention.
The figure is a schematic sectional view showing the main mechanism of FIG. 1, and FIG. 3 is an electric circuit diagram showing the electrical connections of the present invention. Code explanation

Claims (1)

[Claims] a sending device provided in front of a document table formed on the upper surface of the main body of the Overherad projector in the document conveyance direction, and comprising a feed roll for feeding the document onto the document table and a first motor for driving the feed roll; an ejecting device provided behind the document table in the document conveying direction and including a discharge roll that discharges the document on the document table and a second motor that drives the discharge roll; and a discharge device that operates the first and second motors. 1. An automatic document feeder for an Overherad projector, characterized in that it has a start switch that activates the document feeder, and a microswitch that operates upon detecting the passage of any of the documents described above.