JPS5924044Y2 - Document placement mechanism in electrostatic copying machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a document placement mechanism in an electrostatic copying apparatus.

The document placement mechanism in an electrostatic copying device includes a transparent plate for placing the document to be copied and a document holding member for covering the document placed on the transparent plate. has been widely put into practical use.

The document holding member is attached so as to be able to rotate freely between a closed position that covers the transparent plate and an open position that exposes the transparent plate. First, the document holding member that is in the closed position is pivoted to the open position, and then the document is placed on a predetermined position on the transparent plate, and then the document holding member is returned to the closed position, and thus the transparent An operation of covering the plate and the original placed thereon with the original holding member is performed.

In the conventional document placing mechanism, the following disadvantages and inconveniences have arisen due to the fact that the entire document holding member is integrally formed.

Firstly, even if the original to be copied is quite small compared to the area of the transparent plate or document holding member (for example, in the case of an original that is approximately half the area of the transparent plate), the original can be placed exactly as required. In order to do this, it is necessary to pivot the entire document holding member from the closed position to the open position and then from the open position to the closed position, and the rotating operation of the document holding member is not necessarily easy enough.

Second, when the original to be copied is a predetermined page of a book, and particularly if rapid copying is desired, the original can be simply placed on the transparent plate and the original pressing member is Copying is often carried out with the transparent plate in the open position (therefore, the transparent plate and the original placed on it are not covered with the original holding member), but in such cases, the size of the transparent plate is larger than the size of the original. When the size of the exposure area (i.e., the area on the transparent plate that is irradiated with light) is larger, a considerable amount of light leaks out through the transparent plate and has a negative impact on the operator.
Furthermore, in the obtained copy, undesirable so-called solid black portions occur over a considerable range outside the area corresponding to the original.

Therefore, in order to avoid or reduce the above-mentioned inconvenience, the document holding member is divided into at least two parts, and gripping parts are provided on one side and the other, and when one gripping part is gripped and rotated, one of the original holding members is divided into two parts. There has also been proposed a document placement mechanism that is opened separately from the other side, and when the other side is gripped and rotated, the other side and one side are opened together (Japanese Patent Application Laid-Open No. 53 -128329).

However, in such a document placement mechanism, since the document holding member is provided with two gripping portions, it is difficult for the operator to grip which gripping portion to rotate the document holding member when opening and moving the document holding member. Inconveniences such as confusion, or inconveniences such as one side of the original holding member and the other not being connected reliably, making it difficult to ensure that the two are interlocked, especially if the original holding member is moved rapidly when closing. occurs.

The present invention has been made in view of the above facts, and its purpose is to avoid or reduce the above-mentioned inconveniences, and to reliably connect and interlock the divided document holding members with easy operation. An object of the present invention is to provide an improved document placement mechanism.

According to the present invention, there is a transparent plate 10 for placing a document to be copied, and a document mounted so as to be rotatable between a closed position that covers the transparent plate 10 and an open position that exposes the transparent plate 10. In the original document placing mechanism 4 of an electrostatic copying apparatus, which includes a pressing member 12; the original pressing member 12 is divided into at least two parts 12a and 12b, one of which is located in the closed position. Alternatively, a gripping piece 28a is provided for positioning the gripping piece 28H in the open position, and the gripping piece 28H is normally held in the non-acting position by the biasing action of a spring. An interlocking member 30 is provided which can be moved into the operative position against the biasing action of the interlocking member 30; A portion 36 is provided to hold the interlocking member 30 in the non-operating position and press the one side 12 of the original pressing member 12.
When a is rotated, the one 12a turns into the other 12b.
The gripping piece 28
When the interlocking member 30 is held in the operating position while gripping the interlocking member 12a and the one 12a is rotated, the interlocking member 30
is engaged with the receiving portion 36, and the one 12a is engaged with the other 12
A document placement mechanism is provided which is characterized in that it can be opened and closed integrally with the document placement mechanism b.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A document placement mechanism configured according to the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 to 4, which illustrate an electrostatic copying apparatus equipped with a document placement mechanism according to the present invention, the illustrated electrostatic copying apparatus includes a substantially rectangular housing 2; The upper surface of the housing 2 is equipped with a document placement mechanism 4 constructed according to the present invention.

A copy paper cassette 6 is inserted into the housing 2 from one end wall thereof, and a receiving tray 8 for receiving copy paper discharged from the housing 2 is provided at the other end wall of the housing 2. There are various components (see figure) necessary for forming a copy image corresponding to the image of the original document (not shown) held in the mounting mechanism 4 on the copy paper fed from the copy paper printers 1 to 6. (not shown) is provided, but the document placement mechanism 4 in the illustrated electrostatic copying apparatus is
Other configurations are not related to the gist of the present invention,
Since any suitable configuration well known to those skilled in the art may be used, detailed description of configurations other than the document placement mechanism 4 will be omitted in this specification.

The document placement mechanism 4 included in the illustrated electrostatic copying apparatus includes a transparent plate 10 on which a document to be copied is placed.
(FIG. 2) and a document holding member 12 for covering a document (not shown) placed on the transparent plate 10.

The transparent plate 10 is individually defined in a rectangular opening formed in an upper wall 14 defining the upper surface of the housing 2 in an appropriate manner.

The document holding member 12 has two positions: a closed position (position shown in FIG. 1) that covers the transparent plate 10 and the document placed thereon (not shown), and an open position (second position) that exposes the transparent plate 10.
It is necessary that the transparent plate 10 be rotatably mounted around an axis extending along one edge of the transparent plate 10 and in the vicinity thereof.

To this end, in the embodiment shown, a pair of mounting pieces 1 are fixed at a distance on the upper wall 14 of the housing 2.
A support shaft 18 is attached to extend along and near the rear edge of the transparent plate 10 via 6a and 16b, and the rear edge portion of the document holding member 12 is rotatably attached to the support shaft 18. .

The document holding member 12 itself may be of any suitable form such as a flexible plate, but in the illustrated example, it is made of a relatively rigid frame 20 made of a suitable synthetic resin material and a sponge. The elastic body (FIG. 2 shows a seam I. 23 attached to this elastic body) is made of an elastic material such as C.I.

The frame body 20 has a box shape having a top wall and four side walls,
In the closed position, the lower surface facing the transparent plate 10 is open.

The elastic body (not shown) is housed in a box-shaped frame 20, and its exposed surface, that is, the surface facing the transparent plate 10 in the closed position, is coated with a suitable material such as vinyl chloride or urethane. A thin white sheet 23 made of synthetic resin is attached.

In such a document holding member 12, when the document placed on the transparent plate 10 is thick such as a book, the document holding member 12 is moved to the closed position and the document placed on the transparent plate 10 and the document placed on it are moved. When the placed original is covered by the original pressing member 12, the elastic body 22 is compressed according to the thickness of the original, thereby absorbing the thickness of the original.

In the document placement mechanism 4 having the configuration as described above, the overall area is substantially the same as or larger than the effective area of the transparent plate 10 (in other words, the area of the opening formed in the upper wall 14). The original holding member 12, which is important to be somewhat large, has two parts 12a and 12b having approximately the same area.
The rear edges of each of these two parts 12a and 12b are separately and independently rotatably mounted on the support shaft 18.

A gripping piece 28a is provided on one of the two portions 12a and 12b.

One of the two parts 12a and 12b 12a
A gripping piece 28a provided on one side 12a is fixed to the upper surface of one side 12a near the front edge of one side 12a and near the boundary between one side 12a and the other side 12b, and
It has a part that protrudes towards.

Therefore, the gripping piece 28a actually consists of two parts 12a
Although it is fixed only to one of the parts 12a and 12b, it is arranged as if it were provided astride both of the two parts 12a and 12b.

As shown in FIG. 4, this gripping piece 28a has a knob 32 extending below the upper part of the gripping piece 28a, and a gripping part 32 extending downwardly through the upper wall of the frame 20 of the document holding member 12. An interlocking member 30 having an extending retaining portion 34 is attached.

Such interlocking member 30 is usually a spring (not shown).
Although it is held in the non-operating position shown in FIG. 4 by the biasing action of the knob 32, by applying force to the knob 32, it can be turned counterclockwise in FIG. 4 to the operating position. The gripping piece 28 a
It is attached so that it can rotate freely.

On the other hand, when the interlocking member 30 is rotated to the operating position, the other interlocking member 12b of the document holding member 12
A receiving portion 36 is provided which is formed from a concave portion that receives the tip of the retaining portion 34 of 0.

Note that the illustrated document holding member 12 is provided with the interlocking member 30 as described above and the receiving portion 36 that cooperates with the interlocking member 30, so that the elastic body (not shown) housed in the frame 20 is A space is provided in the housing corresponding to the engaging portion 34 and receiving portion 36 of the interlocking member 30.

In the illustrated original holding member 12, when opening the original holding member 12 by simply gripping the gripping piece 28a provided on one of the two parts 12a and 12b, two parts are used. Of the portions 12a and 12b, only one 12a is moved open independently of the other 12b, while the other 12b remains in the closed position.

However, when gripping the gripping piece 28 a and putting one's fingers on the knob 32 of the interlocking member 30, the interlocking member 30 is rotated to the operating position against the biasing action of a spring (not shown), and the original is held down. When the member 12 is not opened, the engaging portion 34 of the interlocking member 30 is connected to the two portions 12a and 12.
Since the two parts 12a and 12b are connected to each other by engaging with the receiving part 36 formed on the other part 12b of the two parts 12b, both of the two parts 12a and 12b can be opened as a unit. Get wet.

Next, the usage of the document placement mechanism 4 as described above will be exemplified, and its effects will be explained.

For convenience of explanation, the overall size of the above-mentioned effective area of the transparent plate 10 corresponds to B4 (or A3) in the JIS standard, and half of the above-mentioned effective area of the transparent plate 10 (therefore, two of the original holding members 12) Assuming that the dimensions of the area covered by each of portions 12a and 12b correspond to B5 (or A4) in the JIS standard, during normal copying operations, the original to be copied is B5 ( or A4) In the following cases, first, press the document holding member 12.
The user grips the gripping piece 28a provided on one of the two portions 12a and 12b to open the document holding member 12 in the closed position.

As a result, only one of the two portions 12a and 12b of the document holding member 12 in the closed position is opened, and only half of the effective area of the transparent plate 10 is exposed.

Next, the original is placed at a desired position on the exposed portion of the transparent plate 10, and then two of the original holding members 12 are pressed.
One of the portions 12a and 12b is moved closed to cover the transparent plate 10 and the document placed thereon.

Then, for example, a copy start button is pressed to start the copy cycle of the device.

On the other hand, if the original to be copied is larger than B5 (or A4), first, one side of the original holding member 12 is
2 grips the gripping piece 28a provided on the gripping piece 28a, and the knob 3 of the interlocking member 30 attached to the gripping piece 28a
2 to rotate the interlocking member 30 to the operating position to open the document holding member 12 which is in the closed position.

In this way, the engaging portion 34 of the interlocking member 30 engages with the receiving portion 36 formed on the other side 12b of the document holding member 12, and the two portions 12a and 12b of the document holding member 12 are held together.
Both are opened and the entire effective area of the transparent plate 10 is exposed.

Next, the original is placed at a desired position on the transparent plate 10, and then the gripping piece 28a is gripped as described above, and the interlocking member 30 is rotated to the operating position, so that the original holding member 12 is in the open position. two parts 12a and 12b of
Both are moved closed, thus covering the transparent plate 10 and the document placed thereon.

The copying cycle of the device is then initiated.

In the document placement mechanism 4 having the above-described configuration, when the document to be copied is considerably smaller than the above-mentioned effective area of the transparent plate 10 (in the illustrated case, it is smaller than half of the above-mentioned effective area of the transparent plate 10). case), one of the two parts 12a and 12b, rather than the entire document holding member 12.
The document can be placed as required by opening and closing only 2a, and therefore, the operation of the document holding member 12 is easy and convenient.

Further, the document holding member 12 has two parts 12a and 12b.
When opening the entire document holding member 12, one side 12a and the other side 12b of the original holding member 12 are reliably connected by positioning the interlocking member 30 at the operating position. This allows the document holding member 12 to be separated into two parts 12a and 12.
Inconvenient or inconvenient (for example,
The opening/closing operation becomes complicated, the opening/closing cannot be done reliably as a unit, etc.).

Furthermore, an interlocking member 30 for connecting the two parts 12a and 12b of the document holding member 12 is attached to the ejection piece 28a.
Since the gripping piece 28a is provided in the document holding member 12, the operation of gripping the gripping piece 28a and the operation of rotating the interlocking member 30 to position it in the operating position can be easily performed with one hand. Both parts 12a and 12b can be easily opened and closed as a unit.

Although the document placement mechanism configured according to the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such specific examples, and various modifications and variations can be made without departing from the scope of the present invention. Needless to say, it is obvious that modifications are possible.

For example, in the specific example shown, the document placement mechanism composed of a transparent plate and a document holding member is a stationary document placement mechanism that is not moved during the document exposure process (therefore, the document placement mechanism is a stationary document placement mechanism that does not move during the document exposure process). During the process, part or all of the optical system disposed in the housing moves to scan and expose the document, or an exposure method is performed in which the entire document is exposed at once) However, the present invention provides a movable document placement mechanism in which a document placement mechanism composed of a transparent plate and a document holding member is moved as required during the document exposure process, thereby achieving scanning exposure of the document. It can also be applied to a mounting mechanism.

In addition, in the illustrated example, the original holding member 12 has two parts.
Although it is divided into equal parts, it is also possible to divide it into three or more parts if desired.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an electrostatic copying apparatus equipped with a document placement mechanism according to the present invention. FIG. 2 is a partial perspective view of the electrostatic copying apparatus shown in FIG. 1, showing a state in which the document holding member of the document placement mechanism is opened. FIG. 3 is a partial perspective view showing a document holding member of the document placement mechanism. FIG. 4 is a partial perspective view showing an interlocking member and a receiving portion provided on the original pressing member. 4...Document holding mechanism, 10...Transparent plate, 12...Document holding member, 12a and 12b
... Each divided part of the document holding member, 28
a...Gripping piece, 30...Interlocking member, 3
6...Ukebe.

Claims (1)

[Claims for Utility Model Registration] A transparent plate 10 for placing an original to be copied, and a transparent plate 10 mounted so as to be rotatable between a closed position covering the transparent plate 10 and an open position exposing the transparent plate 10. In the document placement mechanism 4 of an electrostatic copying apparatus, the document holding member 12 is provided with at least two portions 12a,
12b, one of which is provided with a gripping piece 28a for positioning it in the closed position or the open position. The gripping piece 28 a
An interlocking member 30 is provided which can be moved to the operating position against the biasing action of the spring while gripping the interlocking member 30. Thus, when the interlocking member 30 is held in the inactive position and the one side 12a of the document holding member 12 is rotated, the one side 12a is engaged with the other side 12b. When the interlocking member 30 is held in the operating position while gripping the gripping piece 28a and the one side 12a is rotated, the interlocking member 30 is moved to the receiving portion 36. A document placement mechanism characterized in that the one side 12a is engaged with the other side 12b so that the one side 12a and the other side 12b are opened together.