JPS61121649A - Copying machine - Google Patents

Abstract

PURPOSE:To lower the height of the titled machine and to avoid hindrance to magnification by guiding a read head and a recording head with a common guide means and placing the recording head in the forward direction that the read head in the column scanning direction in magnification. CONSTITUTION:The recording head 4 and the read head 3 are guided and supported movably to common sub-scanning guide rails 13a and 13b in the sub-scanning direction Y. The read head 3 is guided by rails 13a, 13b, driven by a sub-scanning motor 15a via a sub-scanning wire 14a and moved and stopped up to the next main scanning position. This is similar to the recording head 4. In this case, the moving distance L1 at each movement of the read head 3 and the sub-scanning moving distance L2 at each movement of the recording head 4 are expressed as L1=L2 at unmagnification and the number of revolutions of motors 15a, 15b is set at (m) times magnification to obtain the relation of L2=mXL1.

Description

Detailed Description of the Invention [Technical Field] The present invention scans a document with a reading head, converts image information into an electric signal, controls the recording head in response to the electric signal, and copies the image onto a recording medium. The present invention relates to a type of copying device that obtains images.

[Prior art]

An example of a conventional copying apparatus of the type mentioned above is shown in FIG.

In FIG. 3, an original gi 19 is placed on the original platen glass 1 on a flat surface. A reading head 3 for reading a document 19 is guided and supported by main scanning guide rails 7a and 7b. The main scanning wire 9a is connected to pulleys lla and 12a.
Hung on.

It is driven by a main scanning motor 10a and is further coupled to the read head 3.

The sub-scanning tables 5a and 6a are connected to the main-scanning guide rails 7a and 7.
b, and the sub-scanning guide rails 13a and 13
Guided and supported by b. The sub-scanning wire 14a is hung between pulleys 17a and 16a, driven by a sub-scanning motor tSa, and further coupled to the sub-scanning table 6a.

The recording paper 18 is placed on the recording paper table 2 and is at a position where a copy image is printed by the recording head 4. The recording head 4 is guided and supported by main scanning guide rails 8a and 8b. Main scanning wire 9b is hung between pulleys llb and 12b.

It is driven by a main scanning motor lOb and is further coupled to the recording head 4. The sub-scanning platforms 5b and 6b are connected by main-scanning guide rails 8a and 8b, and are guided and supported by sub-scanning guide rails 13c and 13d. The sub-scanning wire 14b is hung between pulleys 17b and 16b and driven by a sub-scanning motor 15b, and is further connected to the sub-scanning table 6b.
is combined with

When attempting to obtain a copy image in this configuration, the reading head 3 reciprocates in the main scanning direction, reads image information on the original 19, and outputs an electrical signal. The recording head 4 driven based on the electric signal prints a copy image on the recording paper 18 while reciprocating in the main scanning direction.

Next, the recording head 4 on the reading head 3 moves in a direction perpendicular to the main scanning direction, that is, in the sub-scanning direction, to a position where the next main scanning is performed, and then stops.

Then, the main scanning and sub-scanning roughly described in Section 1 are repeated to obtain a copy image. However, this conventional configuration has a drawback in that it requires as many as t±2 pairs of sub-scanning guide rails. In addition, since the recording section above the reading section is stacked vertically, there is a drawback that there is a large restriction when it is desired to reduce the height of the device.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an 1,

[Summary of the invention]

In the present invention, the recording head on the reading head is guided by a common guide means, and during enlarged copying, the recording head is positioned ahead of the reading head in the direction of movement of both along the guide means. , both of the above heads are arranged.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings. 1 and 2 show an embodiment of a copying apparatus employing the present invention.

In FIG. 1, a document 19 is placed on the document table glass 1 in a flat manner. A reading head (CO
3 is a main scanning guide rail 7a, which has a solid-state image pickup device such as D and an imaging optical system that forms an original image on this device.
and 7b, it is movably guided and supported in the main scanning direction X parallel to the document table glass l.

The main scanning wire 9a is hung around pulleys lla and 12a provided on each of the four platforms 5a and 6a, driven by a main scanning motor loa provided on the platform 5a, and further coupled to the reading head 3.

The sub-scanning tables 5a and 6a are connected to the main-scanning guide rails 7a and 7.
fixedly connected by b, parallel to the document table crow l,
It is movably guided and supported by sub-scanning guide rails 13a and 13b in a sub-scanning direction Y perpendicular to the main-scanning direction. The sub-scanning wire 14a is hung on pulleys 17a and 18a provided at the orientation Z of the main body of the apparatus, respectively, and is connected to the sub-scanning motor 15.
a, and is further coupled to a sub-scanning table 6a.

The recording paper 18 is placed on the recording paper table 2, and the document platen glass 1 is placed with Il and H.
placed on a flat surface, facing parallel to the original that has been
It is located at a position where a copy image is printed by the recording head 4.

This recording head 4 has an inkjet mechanism, a thermal transfer mechanism, etc., and is driven in response to an electric signal generated by the reading head 3. The recording head 4 is movably guided and supported in the main scanning direction X by main scanning guide rails 8a and 8b. The main scanning wires 9b are hooked around pulleys llb and 12b provided on the stands 5b and 6b, respectively, and are driven by a main scanning motor tob provided on one stand 5b.
is combined with The sub-scanning platforms 5b and 6b are fixedly connected by main-scanning guide rails 8a and 8b, and are movably guided and supported in the sub-scanning direction Y by sub-scanning guide rails 13a and 13b.

The sub-scanning wire 14b is hung around pulleys 17b and 16b provided at fixed positions on the main body of the apparatus, driven by a sub-scanning motor 15b, and further coupled to a sub-scanning table 6b.

When attempting to obtain a copy image in this configuration, the reading head 3 is guided by the main scanning guide rails 7a and 7b, and is reciprocated in the main scanning direction by the operation of the main scanning motor 10b via the main scanning wire 9a. , reads the image information of the original 19 and outputs an electrical signal. Based on that electrical signal
The recording head 4 to be driven is guided by main scanning guide rails 8a and 8b, is driven by the operation of a main scanning motor lOb via a main scanning wire 9b, and is driven in the main scanning direction in synchronization with the movement of the reading head 3 in the main scanning direction. While reciprocating in the direction,
A copy image corresponding to the signal is printed on the recording paper 18.

Note that when the reading head 3 moves in the main scanning direction while reading the original image, and at the same time the recording head 3 moves in the main scanning direction while reproducing the image, the motors 15a
, 15b are inactive.

In addition, the moving speed (vl) of the reading head 3 in the main scanning direction and the moving speed (vl) of the recording head 4 in the main scanning direction at this time are
The ratio v2) corresponds to the selected copy magnification. That is, in this embodiment, it is possible to perform a same-size copy and an m-fold (m)l) copy.

When copying at the same size, Vl = V2, and when copying at m times (enlarged copy)
The time is V2xmXV1, and the motor 10a and the fob are rotationally driven at a speed that satisfies the above speed relationship according to the selected magnification.

Furthermore, the image sensor included in the reading head 3 is made up of a large number of microscopic photoelectric conversion elements arranged in a direction perpendicular to the main scanning direction, while the recording head 4 also has a large number of microscopic inkjet nozzles (in the case of an inkjet mechanism). ) and a large number of microscopic heating elements (in the case of a thermal transfer mechanism). The correspondence relationship between the recording actuating elements is also converted in accordance with the selected magnification. For example, when copying at the same magnification, if one signal from each minute photoelectric conversion element is used to drive each minute recording actuating element. ,
When copying m times, use the signal of one minute photoelectric conversion element to
The micro recording actuating elements adjacent to each other are driven.

However, this is not absolutely necessary; when making m-fold copies, it is also possible to drive every m-th microscopic recording actuating element using the signal of one microscopic photoelectric conversion element, or The imaging magnification of the original image on the image sensor by the imaging optical system (for example, a zoom lens) of the head 3 may be changed in accordance with the selected copying magnification. The signals from the photoelectric conversion elements may be used to drive each recording actuation element.

In any case, once the two heads that read the document and reproduce the image have completed one movement in the main scanning direction, the recording head 4 on the reading head 3 moves in the direction perpendicular to the main scanning direction.
That is, it moves in the sub-scanning direction to the position where the next main scanning is to be performed and then stops. At this time, the reading head 3 is guided by the sub-scanning guide rails 13a and 13b together with the sub-scanning tables 5a and 6a, and is connected to the sub-scanning motor 15 via the sub-scanning wire 14a.
&, moves to a predetermined position for the next main scan, and stops. Further, the recording head 4 is guided by sub-scanning guide rails 13a and 13b together with sub-scanning tables 5b and 6b,
It is driven by a sub-scanning motor 15b via a sub-scanning wire 14b, moves to a predetermined position where the primary main scanning is performed, and stops. At this time, the distance the reading head 3 moves each time (Lx
) The sub-scanning movement pressure l1l (L2
) is determined depending on the selected copy magnification.

That is, L1=L2 when copying at the same size, but L2=mXL1 when copying at m times. As such, the motors 15a, 1
The rotation amount of 5b is set.

In this manner, during enlarged copying, the sub-scanning movement distance of the recording head 4 each time is greater than that of the reading head 3.

Here, as shown in FIG. 2, the recording head 4 is moved in the sub-scanning direction Y, which is the direction of the arrow in the figure, with respect to the reading head 3.
Since they are placed in a position preceding the two, it is possible to copy at the same magnification or enlargement without any problem, even though both are guided by the same sub-scanning rails 13a, 13b.

In the above example, the sub-scanning guide rail is common to the reading and pre-recording heads, but the main scanning guide rail may be common to both heads. In this case, as shown in FIG. Then, the head 3.4 is rotated 90' from the direction shown in the figure, and the rails 13a and 13b are set as main scanning guide rails,
I/-/l/7&, 7b, 8a, 8b may be considered as sub-scanning guide rails.

〔Effect of the invention〕

As explained above, according to the present invention, the number of guide members can be reduced compared to conventional similar devices, the height of the device can be easily lowered, and mechanical interference between the two heads can be easily prevented even during enlarged copying. It has this effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention, FIG. 2 is a schematic sectional view showing the internal operating direction of the device during full-size and enlarged copying, and FIG. 3 is a conventional general device. Schematic perspective view. 1-111 Original platen glass, 2----1 Recording paper platen. 3-111 reading head, 4-111 recording head 5.5a, 5b---1 scanning table, 6.6a, 6b---1 scanning table. 7 a, 7 b------m1 scanning guide rail, 8 a, 8 b------m1 scanning guide rail 9, 9 a, 9 b---m1 scanning wire, 10, lOa , 1Ob----1 main scanning motor, 11
．． 11a, 1lb---Pulley, 12.12a, 12
b-1--Sub-scanning guide rails 13a, i3b, 13c
, 13d---1 sub-scanning guide rail 14.14a, 14b---1 scanning wire. 15.15a, 15b --- one sub-scanning motor. 16, L6a, 16b---Pulley, 17.17a,
17b---Pulley.

Claims (1)

[Claims] a document support means for supporting a document to be copied; a recording material support means for supporting a recording material on which an image is recorded; a reading head for reading the document image and forming an electrical signal corresponding to the image;
A recording head that reproduces an image on a recording material in response to the above-mentioned signals, a driving means that moves the reading head opposite to the document, a driving means that moves the recording head with respect to the recording material, and the reading head and the recording head. a common guide means for the heads;
A copying apparatus comprising: a copying apparatus in which both heads are arranged such that during enlarged copying, the recording head is in a position ahead of the reading head in the direction of movement of the both along the guide means.