JPH0690401B2 - Document Platen Moving Scanning Copy Machine Document Platen Mounting Method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a platen moving scanning type copying machine.

(B) Conventional technology In a conventional platen moving / scanning type copying machine, a platen corresponding to the specific platen is mounted on a specific model, and inevitably the maximum copyable size can be set according to the size of the platen. The manuscript size is also determined.

For example, it is assumed that there is an existing copying machine that can copy a letter size original document in the longitudinal direction. In such a case, if there is a need for a copier that can copy a legal size document (width is equal to letter size and length is about 76 mm longer than letter size) in the longitudinal direction, the copier body is Of course, even the control means for the copying operation had to be changed.

(C) Problems to be Solved by the Invention As described above, in the conventional copying machine, the maximum manuscript size that can be copied is determined according to the size of the manuscript table. When a machine is required, for example, when it is desired to increase the maximum manuscript size that can be copied, another completely new copier is required.

(D) Means for Solving the Problems The present invention includes a document table and a copying machine main body having a mounting portion for mounting the document table, and the document table moves to scan a document. A method of mounting a document table of a scanning copying machine, comprising: a mounted portion mounted on the mounting portion.
A document table and a second document table having at least the mounted portion and having a maximum document size different from the maximum document size that can be placed on the first document table are selectively attached to the copying machine main body. This is a method of mounting a document table of a movable document scanning table copying machine.

(E) Action In the movable platen moving type copying machine, the maximum allowable document size of the copying machine can be easily changed by appropriately changing the platen.

Further, in this case, by providing the control timing signal generating means for the copying operation on the document table, the copying machine main body can be used as it is without changing its main part.

(F) Embodiment FIG. 1 is a constitutional view showing an embodiment in which the present invention is used in an electronic copying machine of a type in which a document table moves, and FIG. 2 is a rear view showing the back surface of the document table.

In these figures, (1) is a copying machine main body, and (2) is a document table mounted on the upper surface so as to be slidable in the left-right direction. A rack (3) extending along the scanning direction is fixedly attached to the back surface of the document table (2).
Is connected to a drive motor (6) via a pinion (4) and a clutch (5) installed in the copying machine body (1). (22) is a handle for transportation.

On the back surface of the document table (2), a second
5 as a control timing signal generating means as shown in the figure
Individual projections (7), (8), (9), (10) and (11) are formed so as to project downward. These protrusions (7) (8) (9) (1
0) and (11) are arranged in two rows, and in FIG. 2, the first projection (7) provided in the upper first row corresponds to the home position (HP) of the document table (2). , The second protrusions (8) provided in the same row are the cue position (SP) of the document table (2).
It corresponds to. The third protrusions (9) provided in the first row are the fifth protrusions (11) provided in the second row below.
At the same time, the platen (2) corresponds to the backward movement reverse position (FP) in which the original table is reversed from the backward movement to the forward movement. Further, the fourth protrusions (10) provided in the second row correspond to the forward movement reversing position (RP) in which the document table (2) is reversed from the forward movement to the backward movement.

The micro switch (12) (13) has the protrusion (7).
The first microswitches (12) are provided at the portions corresponding to the columns (8), (9), (10), and (11), and the first microswitch (12) is provided on the platen (2)
Is located at the home position (HP),
The second micro switch (13) is fixedly provided at a position where it abuts on the protrusion (7), and the second micro switch (13) is juxtaposed with the first micro switch (12).

The third protrusion (9) and the fifth protrusion (11) are provided at substantially the same position along the scanning direction of the document table (2), and the first protrusion (7) and the second protrusion (8) are provided. ), 4th protrusion (10)
Are provided at positions separated from each other along the scanning direction.

FIG. 3 is a diagram showing the scanning position of the document table (2) and the positions of the micro switches (12) and (13). The relationship between the outputs from the micro switches (12) and (13) and the position of the document table (2) will be described with reference to this figure.

When the platen (2) is located at the home position (HP), only the first protrusion (7) contacts the first micro switch (12), and only the first macro switch (12) reads ""0" is output (in this embodiment, "0" is output when the microswitches (12) and (13) are in the on state, and "1" is output when they are in the off state). Next, when the platen (2) is once moved back to the left and reaches the backward movement reverse position (FP), the third protrusion (9) is attached to the first micro switch (12) and the fifth protrusion (9). 11) is second
The micro switches (13) come into contact with each other, and "00" is output from each of the micro switches (12) and (13). After that, the scanning direction of the document table (2) is reversed, and the document table (2) starts to move forward, and when it reaches the indexing position (SP), only the second protrusion (8) comes into contact with the first micro switch (12). ,
Only the first micro switch (12) outputs "0". When it is detected that the document table (2) has reached the cueing position (SP), the copy paper waiting at a certain position is fed, and the edge of the document and the edge of this copy paper are transferred. Time to match.

Then, when the exposure scanning of the document is completed and the document table (2) reaches the forward reversal position (FP), only the fourth protrusion (10) contacts the second micro switch (13), and the second micro switch (13) is contacted.
"0" is output only from the micro switch (13). Then, the scanning direction of the platen (2) is reversed to start the backward movement, and when the home position (HP) is reached, the platen (2) is stopped. When a plurality of originals are continuously copied, the original platen (2) that has moved backward does not stop at the home position (HP), but returns to the backward movement reverse position (FP) at once.

The position of the document table (2) and the micro switch (12)
The following table shows the relationship with the output from (13) as a logical value. The home position (HP) and the cue position (SP) have the same logical value, but the moving direction of the platen (2) is different (the order in which the logical values are changed is different) as described later. , Both positions (HP) (SP) can be identified.

Next, the sequence of this embodiment will be described with reference to FIGS. In these figures, the sheet feeding solenoid (14) is operated to rotate the sheet feeding roller to start the sheet feeding operation, and the copy sheet is conveyed to the cueing shutter section and stopped. The cue-out shutter solenoid (15) operates to open the cue-out shutter, and the copy paper is re-fed toward the photoconductor. Further, when the forward solenoid (16) is operated, the document table (2) is moved forward, and when the backward solenoid (17) is operated, the document table (2) is returned.

Also, when the exposure lamp (18) lights up, the original is exposed,
When the charging high-voltage unit (19) operates, the photoconductor is charged by the charging corotron. Further, when the transfer bias high-voltage unit (20) is operated, the toner image on the photoconductor is transferred onto the copy paper.

When the start key (21) is operated by the operator, first, the drive motor (6), the transfer bias high voltage unit (20), and the paper feeding solenoid (14) are operated,
The copy paper feeding operation is started. At this time, the original table (2) is placed at the first and second micro switches (1
2) It is detected by the logic state of (13),
When the platen (2) is already in the backward movement reverse position (FP), that is, when the logic of the micro switch is "00", it is not necessary to move the platen (2) back. However, if it is not in the backward reversal position (FP), it is necessary to operate the backward solenoid (17) to move the platen (2) to the backward reversal position (FP).

And by operating the forward solenoid (16),
While moving the document table (2) forward, the exposure lamp (18) and the charging high-voltage unit (19) are operated to form a document image on the photoconductor. Is blocked by the advance.

Next, since the original image on the photoconductor and the edge of the copy paper coincide with each other, the original table (2) reaches the indexing position (SP), and the logic of the microswitches (12) and (13) changes to " Wait until it becomes 01 ”. When the document table (2) reaches the cueing position (SP), the cueing shutter is opened and the copy paper is re-fed.

At this time, the transfer bias high-voltage unit (20) operates to sequentially transfer the original images on the photoconductor onto the copy sheet. During this transfer, the original table (2) continues to move and scan. When the dynamic reversal position (RP) is reached, the micro switch (1
2) The logic of (13) becomes "10" and the forward solenoid (1
6) is inoperative. At this time, the exposure lamp (1
8), the charging high voltage unit (19) is also inoperative.
Then, when the return solenoid (17) is operated,
When the platen (2) moves back and reaches the home position (HP), the logic of the micro switch (12) (13) becomes "0".
1 ”and all operations stop.

The first micro switch (12) is provided between the home position (HP) and the backward reversing position (FP), and between the cueing position (SP) and the forward reversing position (RP). A signal is output (see the dotted line in Fig. 5), and the logic of this micro switch (12) (13) is "01".
And become the same. However, from the home position (HP) to the backward reversal position (FP), the FP signal "00"
Waiting for and waiting for the RP signal "10" from the cue position (SP) to the forward reverse position (RP), the SP signal "01" and HP signal "01" are input. Is also ignored and the normal sequence is executed.

In this embodiment, the micro switch is used as the sensor of the detection member, but the present invention is not limited to this, and a magnetic sensor or a photo sensor can be used.

Next, a case where the maximum allowable document size is changed in the copying machine will be described.

FIG. 7 is a schematic view of the copying machine (1) viewed from a direction perpendicular to the moving direction of the document table, and the initial maximum allowable document size of this copying machine is the letter size (longitudinal direction).
As shown in the figure, the letter-size platen (2) has almost the same length as the main body of the copying machine (1), and the copy operation is controlled near the side edge of the back side of the platen (2) as described above. Five protrusions (7) (8) as timing signal generating means
(9), (10) and (11) are formed so as to project downward. When the maximum allowable document size of this copying machine is expanded to the legal size, the document table (2) may be changed to the legal size document table (2) 'as shown in the drawing. This legal-size manuscript table (2) 'has five protrusions (7)' on its back surface, like the letter-size manuscript table (2).
(8) '(9)' (10) '(11)' is formed to project, but the projection (9) '(1
The distance between 1) ′ and the protrusion (10) ′ for detecting the forward / reverse position is increased by the distance X. This distance X is the difference between the legal size and the letter size and is approximately 76
mm. In this embodiment, the distance between the forward reversal position detecting protrusion (10) 'and the home position detecting protrusion (7)' is expanded by X. As described above, it is apparent from the above description that a legal size original can be copied without any problem in the copying operation even when the original size is changed to the legal size original table (2) '. That is, since the copy operation control timing signal generating means is provided on the document table, the copy operation control means provided in the main body of the copying machine is directly applied even when the document table is changed to have a different maximum allowable document size. can do.

Even if the document table is not provided with the control timing signal generating means for the copying operation, the main part of the copying machine main body can be used as it is by only changing a part of the operation sequence program.

However, it goes without saying that the size of the transfer paper also has to be changed in accordance with the change of the document size.

Further, when the size of the transfer paper is changed, there may be a problem in detecting a jam of the transfer paper during the copying operation. In this case, it is possible to deal with the jam by simply replacing the micro computer controlling the copying machine. But,
By using the following method, it is possible to detect a jam regardless of the transfer paper size by changing only the document table. That is, this method is based on the fact that the time required for the transfer paper to pass a certain distance in the copying machine is determined by the size of the transfer paper, and the passage time of the transfer paper is determined by the jam sensor provided in the transfer paper passage. It is judged as a jam if the time is measured and the vehicle does not pass within the specified time. In this method, if the predetermined time is set on the basis of the maximum size of the transfer papers that can be exchanged, the jam can be surely detected even when the size of the transfer paper is changed. By doing so, even when the platen is changed, it can be used without changing the main body of the copying machine and the program of the microcomputer.

Further, as shown in FIG. 7, when the letter-size platen is changed to the legal-size platen, one end of the platen in the direction of movement of the platen may protrude from the main body of the copying machine, which may occur when the copying machine is transported. Alternatively, the document table may be damaged during installation. Therefore, when the length of the platen in the moving direction of the platen becomes longer than the length of the main body of the copying machine in the same direction, as shown in FIG. 8, the length of the platen is almost equal to the difference between the two. The platen protection member (23) can be attached to the side wall (24) of the copying machine body (1) so that only the end of the document table (2) 'does not protrude from the copying machine body (1). desirable. In this case, in the case having the handle (22) for transporting the copying machine as in the present embodiment, the document table protruding side is on the same side as the side wall on which the handle (22) is provided, and is shown in that state. Not only can the copy machine be transported more safely if it is constructed so that the movement of the platen is blocked by an appropriate locking means, the copy machine should be placed with the other side surface (25) as the bottom surface. You can also

FIG. 9 is an embodiment showing a method of mounting the document table on the main body of the copying machine, as seen from the moving direction of the document table. The manuscript table (26) includes a base table (27), a manuscript placing glass plate (28) integrally attached thereto, and a rotation fulcrum (29).
A manuscript cover (30) joined to the base by
It is composed of a guide rail (31) for reciprocating the document table. The guide rail (31) is configured such that the upper rail (32) and the lower rail (33) slide independently (the sliding direction is vertical to the drawing), and the upper rail (32) is The lower surface of the base (27) is fixed by screws or the like, and the lower surface of the lower rail (33) has a plurality of protrusions (34) along the sliding direction.
Are formed. A rack (35) extending along the sliding direction and projections (36) (37) as the control timing signal generating means are fixed to the lower surface of the base (27). With the above structure, the protrusion (34) is inserted into the hole (39) formed in the copying machine body (38),
By fixing the engaging portion between the hole (39) and the protrusion (34) by an appropriate method, the document table (26) is slidably attached to the copying machine body (38). Further, in this state, the micro switches (40) (41) provided on the main body (38) of the copying machine are positioned so as to correspond to the protrusions (36) (37), respectively, and the pinion for driving the platen is driven. (42) is in mesh with the rack (35), and the lower surface (43) at one end of the glass plate (28) is a sliding surface provided at one end of the copying machine body (38). Held by (44). If the platen (26) and the copying machine main body (38) are combined with each other with a simple structure in this way, the platen (26) can be easily replaced with another platen having a similar size. If the both mounting methods are further simplified, the user can replace the platen by himself.

In the embodiment, the case where the document table size is increased has been described, but it goes without saying that the case where the document table size is decreased can be similarly performed.

(G) Effect According to the present invention, the first document table having the mounted part mounted on the mounting part and the maximum document size having at least the mounted part and capable of being placed on the first document table are By selectively mounting the second manuscript table with a different maximum manuscript size on the copier body, the copying ability can be substantially changed, and a copier with a copy size that meets the needs of the user can be easily realized. can do.

[Brief description of drawings]

The drawings are all for explaining the embodiments of the present invention. FIG. 1 is a block diagram of a document table drive of a copying machine, FIG. 2 is a rear view of the document table, and FIG. 3 is each position of the document table. FIG. 4 is a schematic view showing the position, FIG. 4 is a control circuit, FIG. 5 is a time chart, FIG. 6 is a flow chart, FIG. 7 is a comparative view of a document table, and FIG. 8 is a side view with a protective member attached. FIG. 9 is an embodiment showing a method of mounting the document table. (1) (38) ... copier body, (2) (26) ... document table,
(7)-(11), (7) '-(11)', (36) (37) ...
Protrusion

Claims (1)

[Claims] 1. A method of mounting a document table of a document table moving scanning copying machine, comprising: a document table; and a copying machine main body having a mounting section for mounting the document table, wherein the document table moves to scan a document. A maximum document size different from a first document table having a mounted part mounted on the mounting part and a maximum document size having at least the mounted part and capable of being placed on the first document table. A method of mounting a manuscript table of a manuscript table moving scanning type copying machine, characterized in that a second manuscript table is selectively mounted to the copying machine body.