JP2001350391A - Document reading/recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document reading/recording device which can generate optimum restoring force for supporting a reading frame with a support spring simple in configuration and can keep the reading frame open even when the initial restoring force is not obtained due to deterioration of the support spring with time. SOLUTION: The device has a main body frame 3 and the reading frame 6 which is turnably supported at the top 4 of the main body frame 3 so that the frame 6 is selectively opened and closed. The device also has a support spring 7 which presses the reading frame 6 upwards. The device further has a document reading part 9 which is arranged inside the reading frame 6 and has a reading carriage 8 which scans an image of a document while moving horizontally. When the reading frame 6 is opened, the reading carriage 8 is moved to a predetermine position and stopped in the position. After the stop of the reading carriage 8, its driving power source is cut off. The stopped position of the reading carriage 8 can be altered in accordance with setting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading / recording apparatus such as a copying machine or a multi-function facsimile machine, and more particularly to a reading unit frame supported on an upper portion of a main body frame. The present invention relates to a document reading / recording device capable of performing the same.

[0002]

2. Description of the Related Art Generally, in a document reading and recording apparatus,
When a recording unit cover is provided on the upper surface of the main body frame so as to be openable and closable for maintenance of the recording unit disposed inside the main body frame, the recording unit cover is provided with a document reading unit integrally. There are many cases. For example, in the document reading and recording apparatus 1 shown in FIG.
The reading unit frame 6 is placed on the upper surface of the main body frame 3 on which the recording paper storage unit 13 and the like are arranged. The reading unit frame 6 is supported by one end of the upper surface 4 of the main body frame 3. , Which functions as a recording unit cover that opens and closes the upper surface 4 of the main body frame 3 by being supported so as to be able to open and close. Here, a document reading unit 9 including a reading carriage 8 that scans an image of a document while moving in the horizontal direction is disposed inside the reading unit frame 6, and integrally with the opening and closing operation of the reading unit frame 6. It will open and close.

A support spring 7 is disposed between the reading section frame 6 and the main body frame 3 to urge the reading section frame 6 upward. The support spring 7 urges the reading unit frame 6 upward, so that when the reading unit frame 6 is opened, the reading unit frame 6 can be lifted upward with a light force, and supports the reading unit frame 6. It is provided to maintain the open state. Normally, the opening / closing operation of the reading unit frame 6 is performed during maintenance such as replenishment of toner to the recording unit 2 inside the main body frame 3 or replacement of the photosensitive drum, and removal of a paper jam generated in the recording unit 2. The frequency of the opening / closing operation is not very high. Therefore,
Since the use frequency of the support spring 7 is not so high, a simple spring is often used as the support spring 7.

[0004] At this time, if the restoring force of the support spring 7 is too large, the force for urging the reading unit frame 6 upward will be too large, and it is dangerous to jump up when the reading unit frame 6 is opened. On the other hand, if the restoring force of the support spring 7 is too small, the force for urging the reading unit frame 6 upward is insufficient, and the reading unit frame 6 cannot be held in an open state. Therefore, the supporting spring 7 has a restoring force enough to generate a moment slightly larger than the downward moment exerted on the supporting unit 5 by the reading unit frame 6, so that the reading unit frame 6
It is optimal to apply the minimum force that can be held in the open state.

[0005]

However, the original reading section 9 disposed inside the reading section frame 6 has a reading carriage 8 which moves in the horizontal direction, and the reading carriage 8 has a considerable weight. Therefore, when the reading carriage 8 moves in a direction perpendicular to the support shaft of the supporting unit 5, that is, in the left-right direction in FIG. 1, the reading unit frame 6 is moved to the supporting unit 5 by the position of the reading carriage 8. The resulting downward moment will be different. That is, when the reading carriage 8 is at a position close to the support unit 5, the moment by the reading unit frame 6 is small. Conversely, when the reading carriage 8 is at a position far from the support unit 5, the moment by the reading unit frame 6 is small. Becomes larger. Therefore, if the support spring 7 is selected in accordance with the case where the reading carriage 8 is located far from the support section 5, the restoring force of the support spring 7 is too large when the reading carriage 8 is located near the support section 5. Conversely, when the support spring 7 is selected in accordance with the case where the reading carriage 8 is located at a position close to the support section 5, the restoring force of the support spring 7 is small when the reading carriage 8 is located at a position far from the support section 5. Therefore, there is a problem that it is very difficult to select a support spring 7 that always generates an optimal restoring force.

[0006] Even if the supporting spring 7 initially generates an optimal restoring force, if the restoring force is reduced due to aging and the initial restoring force cannot be obtained, the reading unit frame 6 is re- moved. There is also a problem that the support spring 7 cannot be held in the open state and the support spring 7 needs to be replaced.
On the other hand, if the supporting spring 7 having a large restoring force is used in combination with a damper (not shown), when the reading unit frame 6 is opened while having a sufficient restoring force to hold the reading unit frame 6 in an open state. Can be prevented, but the configuration around the support spring 7 becomes complicated,
Since the extra space is required, there is a problem that the cost and size of the document reading and recording apparatus 1 are prevented.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and supports a reading unit frame serving as an upper surface cover of a main body frame by a support spring having a simple structure that does not require an additional structure such as a damper. In addition to the above, it is possible to generate an optimal restoring force, and to keep the reading unit frame open even when the initial restoring force cannot be obtained due to aging of the support spring. It is an object of the present invention to provide a document reading and recording apparatus.

[0008]

Means for solving the above problems are as follows. That is, the document reading and recording apparatus according to claim 1 is capable of opening and closing and pivoting on a main body frame having a recording section therein and a support section provided on an upper surface of the main body frame and provided at one end of the upper surface. A supported reading section frame, a support spring disposed on the support section to bias the reading section frame upward, and disposed inside the reading section frame;
A document reading unit having a reading carriage that scans a document image while moving in the horizontal direction, wherein the reading carriage is moved to a predetermined position and stopped when the reading unit frame is opened. It is.

According to a second aspect of the present invention, in the document reading and recording apparatus according to the first aspect, the power supply for driving the reading carriage is shut off after the reading carriage stops at a predetermined position. is there.

According to a third aspect of the present invention, in the document reading and recording apparatus according to the first or second aspect, the stop position of the reading carriage can be changed by setting.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an original reading and recording apparatus according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a document reading and recording apparatus 1 according to an embodiment of the present invention includes a main body frame 3 having a recording unit 2 therein,
A reading unit frame 6 mounted on an upper surface 4 of the main body frame 3 and supported by a support unit 5 provided at one end of the upper surface 4 so as to be openable and closable; A document reading unit 9 having a support spring 7 for urging the frame 6 upward, a reading carriage 8 disposed inside the reading unit frame 6 and scanning a document image while moving in the horizontal direction; And a cover opening sensor 10 for detecting that the reading carriage 6 is opened.
Is moved to a predetermined position and then stopped. This will be described in more detail below.

The main body frame 3 is a box-shaped member surrounding each part constituting the main body of the document reading and recording apparatus 1, and an opening 11 is provided on the upper surface 4 thereof. Further, inside the main body frame 3, a recording unit 2 for recording the image of the read original on a recording paper 12, a recording paper storage unit 13 for storing the recording papers 12 in a predetermined size in a stacked state, A recording paper transport unit 14 that transports the recording paper 12 from the unit 13 to the recording unit 2, a control unit 15 that controls the operation of each unit of the document reading and recording apparatus 1, and the like are arranged. The recording unit 2 is disposed immediately below the opening 11, and maintenance such as toner supply and replacement of the photosensitive drum, and removal of a paper jam generated in the recording unit 2 can be performed from the opening 11. I can do it. A recording paper discharge tray 16 is provided at a position adjacent to the recording section 2 on the side of the main body frame 3, and the recording paper 12 on which an image has been recorded after passing through the recording section 2 is recorded on the recording paper discharge tray. It is discharged to 16.

The reading section frame 6 is a box-shaped member surrounding the document reading section 9 housed therein, and is mounted on the upper surface 4 of the main body frame 3. The support portion 5 provided at one end of the upper surface 4 of the main body frame 3 is supported so as to be capable of opening and closing and rotatable, thereby serving as a recording portion cover for opening and closing the opening 11 of the upper surface 4 of the main body frame 3. . That is, by lifting the reading unit frame 6 upward, the opening 11 on the upper surface 4 of the main body frame 3 is opened, and maintenance of the recording unit 2 can be performed. The opening 11 can be closed by bringing the opening 11 into close contact with the upper surface 4.

The support portion 5 is provided on the upper surface 4 of the main body frame 3.
And a support shaft 18 is set along a side of one end of the upper surface 4 of the main body frame 3 so as to rotatably connect one end of the main body frame 3 to one end of the lower surface 17 of the reading unit frame 6. Then, the reading unit frame 6 is opened and closed about the support shaft 18. Further, a support spring 7 is disposed on the support portion 5.

The support spring 7 urges the reading section frame 6 upward so that the reading section frame 6 can be lifted upward with a light force when the reading section frame 6 is opened. It is provided to support and maintain an open state. Here, the opening and closing of the reading unit frame 6 is performed for maintenance such as replenishment of toner to the recording unit 2 and replacement of the photosensitive drum, and for recording unit 2.
Since the frequency of the removal of paper jams caused by the above is not so high, the support spring 7 is provided with a simple configuration and the installation space in order to reduce the size and cost of the document reading and recording apparatus 1. It is preferable to use a spring having a small size.

Accordingly, in the present embodiment, a torsion bar spring using a wire is used as the support spring 7. More specifically, the support spring 7 is a linear spring body 1.
9 and two mounting ends 20 formed by bending both ends of the spring main body 19 at substantially right angles to the spring main body 19 and in different directions. And the spring body 1
9 are arranged along the support shaft 18 of the support portion 5 and the mounting ends 20 on both sides are respectively attached to the lower surface 1 of the reading unit frame 6.
7 and is fixed to the upper surface 4 of the main body frame 3 to be attached to a predetermined position. Here, by arranging the two support springs 7 in mirror symmetry, a uniform restoring force in the direction of the support shaft 18 can be obtained. The form of the support spring 7 is not limited to this, and other springs such as a coil spring can be used.

An end of the reading section frame 6 opposite to the supporting section 5 is connected to the end of the upper surface 4 of the main body frame 3 opposite to the supporting section 5 to the main body frame 3 to maintain the closed state. A latch 21 is provided for holding.
The latch 21 prevents the reading unit frame 6 from being opened carelessly. The latch 21 is released by operating a lever 22 provided on a side surface of the main body frame 3 to open the reading unit frame 6. To make it possible. The latch 21 is provided with the reading unit frame 6.
Is provided with a cover open sensor 10 for detecting that is opened.

The cover open sensor 10 includes a latch 2
The one that outputs a signal by detecting the movement of the lever 22 due to the operation of the lever 22 by the user or the one that outputs a signal by detecting that the user touches the lever 22 itself is used. can do. Specifically, when the movement of the lever 22 is detected, an optical sensor is arranged in the operating direction of the lever 22 or a limit switch that is activated by the operation of the lever 22 is arranged. In addition, when detecting that the user has touched the lever 22, the lever 22 itself is configured by disposing an electrostatic sensor or the like for sensing contact. This makes it possible to detect that the user has operated the lever 22 of the latch 21 to open the reading unit frame 6.

The original reading section 9 is an original mounting plate 2 which is a transparent flat plate provided on the upper surface of the reading section frame 6.
3, a reading carriage 8 that is arranged inside the reading section frame 6 and scans the original placed on the original placing plate 23, and horizontally moves the reading carriage 8 along the lower surface of the original placing plate 23. And a driving unit 24 for reciprocating in the direction. The reading carriage 8 scans the image of the original placed on the original placing plate 23 using a contact image sensor or a charge-coupled image sensor using a CCD, and outputs the read image as an electric signal. It is a device to do. The drive unit 24 includes a pair of pulleys 25 and 26 disposed at both ends of the movement range of the reading carriage 8.
And the belt 2 wound between the pulleys 25 and 26
7 and a step motor 28 for rotating one pulley 26. The reading carriage 8 is fixed to the belt 27. Then, the belt 27 is rotated by the step motor 28, and the reading carriage 8 scans the original while moving in the horizontal direction along the lower surface of the original placing plate 23.

On the upper part of the reading section frame 6, a holding lid 29 is provided so as to be capable of opening and closing and rotating. The holding lid 2
Reference numeral 9 denotes a function of pressing the document so as not to move by placing it on the document placed on the document placing plate 23, and also preventing the shadow from being generated around the document as a background of the document. . An automatic document feeder (ADF) 30 is provided on the upper surface of the presser lid 29.
Is provided. The automatic document feeder 30 separates a plurality of documents placed on the document tray 31 one by one and automatically supplies the documents to the document reading unit 9. The document passes over a transparent light-transmitting plate 32 provided adjacent to the document placing plate 23 on the upper surface of the document, and at this time, the image is scanned and read by the reading carriage 8. Here, when scanning the original supplied by the automatic original supply unit 30, the reading carriage 8 is moved below the light transmitting plate 32 by the driving unit 24. The scanned document is then discharged to a document discharge tray 33 provided below the document tray 31.

Next, a circuit configuration of the document reading and recording apparatus 1 according to the present embodiment will be described with reference to FIG. FIG.
Will copy and copy the original reading and recording apparatus 1 according to the present embodiment.
This shows a case where the present invention is embodied in a facsimile multifunction peripheral. Therefore, a modem 34 and a network control unit (NCU) 35 are provided as communication means for performing a facsimile function. Also, a ROM (read only memory) 36
Various programs necessary for the operation of the document reading and recording apparatus 1 are stored. A RAM (random access memory) 37 temporarily stores data and the like obtained by executing various programs. The image memory 38 temporarily stores image data of a document scanned by the document reading unit 9 and received image data when a facsimile is used.

The original reading section 9 scans an image of an original placed on the original placing plate 23 or an original supplied by the automatic original supply section 30 by scanning with the reading carriage 8, and reads the image.
The image data is output to the control unit 15. At this time, when scanning the original placed on the original placing plate 23, the reading carriage 8 scans the original while moving in the horizontal direction along the lower surface of the original placing plate 23 by the driving unit 24, When scanning the original supplied by the automatic original supply unit 30, the reading carriage 8 is driven by the driving unit 24 to transmit the light to the light transmitting plate 32.
, And stops at that position to scan the original (see FIG. 1). The image data sent to the control unit 15 is stored in the image memory 38.

The recording unit 2 receives image data of a document read by the document reading unit 9 and received image data when a facsimile is used from the control unit 15 and records it on the recording paper 12. The recording paper storage unit 13 stores the recording paper 12 of a predetermined size.
Receiving a command from the control unit 15 to send out the recording paper 12 of an appropriate size selected according to the document size or the like to the recording paper transport unit 14. Recording paper transport unit 1
4 is a recording paper storage unit 13 which receives an instruction from the control unit 15.
The recording paper 12 is conveyed to the recording unit 2 from. The latch 21
A lever 2 provided on a side surface of the main body frame 3 prevents the reading unit frame 6 from being opened carelessly.
It is released by operating 2. In addition, the latch 21
Has a cover open sensor 10, which detects that the reading unit frame 6 is opened and outputs the information to the control unit 15. The power supply unit 39 is connected to an external power supply and supplies a current to each unit inside the document reading and recording apparatus 1. The control unit 15 controls the operation of each unit and the information transfer as described above.

The display unit 40 includes a liquid crystal display panel, an LED, and the like. The display unit 40 receives information from the control unit 15, performs various setting states and operation states of the apparatus, and reads the reading carriage 8 when the reading unit frame 6 is opened. Also displays the setting of the stop position of. The operation unit 41 includes a start key, a numeric keypad for inputting the number of copies, a magnification setting key, and other various operation keys for setting a stop position of the reading carriage 8 and the like. 15 is output. The display unit 40 and the operation unit 41 are arranged at a position on the upper front of the document reading and recording apparatus 1 where the user can easily operate and check (see FIG. 2).

Next, the operation of the document reading and recording apparatus 1 according to this embodiment will be described with reference to the flowchart shown in FIG. First, it is determined whether or not the opening of the reading unit frame 6 is detected by the cover opening sensor 10 of the latch 21 (S1). When it is not detected that the reading unit frame 6 is opened (S1: NO), the process returns to the beginning. If it is detected that the reading unit frame 6 is opened (S1: YES), then the current position PP of the reading carriage 8 and a preset stop position P
The relationship with S is determined (S2). At this time, as shown in FIG. 1, the reference position PH set at one end of the movable range of the reading carriage 8, in this embodiment, at the end on the support portion 5 side (see FIG. 1), is set to the other end. If the current position PP is on the reference position PH side of the stop position PS when the positive coordinate axis X is taken toward the end of the current position PP, the current position PP becomes a value smaller than the stop position PS (current position PP <stop position). Conversely, if the stop position PS is closer to the reference position PH than the current position PP, the current position PP becomes a value larger than the stop position PS (current position PP> stop position PS). The reference position P in the movable range of the reading carriage 8
A limit position PL is set at the end opposite to H. When it is detected that the reading unit frame 6 is opened (S1: YES), the reading carriage 8 is temporarily stopped at the current position PP, and then the relationship between the current position PP of the reading carriage 8 and the stop position PS is determined. Yes (S2)
It is also possible.

When the current position PP of the reading carriage 8 is on the reference position PH side of the stop position PS (S2:
PP <PS), the reading carriage 8 is moved in the direction of the limit position PL, that is, in the direction opposite to the reference position PH by the value of the difference between the stop position PS and the current position PP, that is, the value of "PS-PP" (S3). ), Whereby the current position PP of the reading carriage 8 is made the same as the stop position PS. on the other hand,
When the stop position PS of the reading carriage 8 is closer to the reference position PH than the current position PP (S2: PP> P
S), the reading carriage 8 is moved from the current position PP to the stop position P.
The reading carriage 8 is moved in the direction of the reference position PH by the value of the difference from S, that is, the value of "PP-PS" (S4). If the current position PP of the reading carriage 8 is substantially the same as the stop position PS (S2: PP = PS),
The reading carriage 8 does not move. Here, the reading carriage 8 is directly moved from the current position PP to the stop position PS. However, in order to simplify the control, the reading carriage 8 is always moved to the reference position PH, and thereafter, It is also possible to move to the stop position PS.

After moving the reading carriage 8 to the stop position PS as described above, the drive unit 24 is stopped to stop the reading carriage 8 at the stop position PS (S5).
Thereafter, the supply of the high-voltage current of a certain level or more from the power supply unit 39 is immediately interrupted (S6). Here, the current for driving a motor or the like mainly corresponds to the high-voltage current of a certain level or more that is interrupted. Such interruption of the current is achieved by opening the reading unit frame 6 to supply toner to the recording unit 2, replace the photosensitive drum, perform maintenance such as replacement of the photosensitive drum, or remove a paper jam generated in the recording unit 2. This is performed because it is dangerous if a high-voltage current flows through the recording unit 2 or the like inside the recording apparatus 1.

Therefore, it is desirable that the supply of the high-voltage current be interrupted by the time when the reading unit frame 6 is opened, but after the cover opening sensor 10 detects that the reading unit frame 6 is opened (S1: YES), it takes about several seconds to move the reading carriage 8 and cut off the supply of the high-voltage current (S6).
It is also assumed that the reading unit frame 6 is opened before interrupting the high-voltage current. Therefore, even when the user attempts to open the reading unit frame 6 by operating the lever 22 of the latch 21 or the like, the latch 21 does not receive a signal indicating that the high-voltage current has been cut off from the control unit 15. It is also possible to adopt a structure that is not released while fixing. By doing so, the user may have to wait for several seconds after trying to open the reading unit frame 6, but it is possible to surely avoid the danger such as electric shock of the user.

In this embodiment, the latch 21
When it is detected that the reading unit frame 6 is opened by the cover opening sensor 10 (S1), the reading carriage 8 is moved to a predetermined stop position PS and stopped there. In the case where the frame 6 is reliably opened, that is, when the document reading and recording apparatus 1 cannot be used unless the reading section frame 6 is opened and maintenance is performed, the reading carriage 8 is similarly moved. It is preferable to perform control so as to move to a predetermined stop position PS and stop. In such a situation, for example, when a paper jam occurs in the recording unit 2 and the reading unit frame 6 has to be opened to remove the jammed paper, the reading unit frame 6 has to be removed because the toner has completely run out. In some cases, it is necessary to open the reading unit frame 6 to supply toner, and in other cases, it is necessary to open the reading unit frame 6 for repair due to a failure in the apparatus.

Next, the stop position PS of the reading carriage 8
The process for setting is described with reference to the flowchart shown in FIG. First, on the setting screen for setting the stop position of the reading carriage 8, the currently set stop position PS of the reading carriage 8 is displayed (S1).
1). The display at this time is performed by a distance from the reference position PH, for example, “「 mm from the reference position ”. Next, it is determined which setting key operation has been performed on the operation unit 41 (S12).

When the plus key of the setting key is operated (S12: plus key), it is determined whether or not the currently set stop position PS of the reading carriage 8 is at the limit position PL (S13). If the currently set stop position PS is the limit position PL (S13: YES), the setting of the stop position PS is not changed, the process returns to S11, and the currently set reading carriage 8 is again set. Is displayed. If the currently set stop position PS is smaller than the limit position PL (S1
3: NO), the stop position PS is changed to a position moved by the unit distance D in the plus direction, that is, the direction of the limit position PL (S14). This unit distance D can be any value. In the present embodiment, “D = 1 mm” can be set in units of 1 mm. However, in consideration of operability, values larger than this, for example, “D = 5 mm”, “D = 1”
0 mm "or the like. After the stop position PS is changed, the process returns to S11, and the changed stop position PS of the reading carriage 8 is displayed (S11).

When the minus key of the setting key is operated (S12: minus key), it is determined whether or not the currently set stop position PS of the reading carriage 8 is at the reference position PH (S15). Stop position P currently set
If S is the reference position PH (S15: YES),
The setting of the stop position PS is not changed, the process returns to S11, and the currently set stop position PS of the reading carriage 8 is displayed again. If the currently set stop position PS is greater than the reference position PH (S
15: NO), the stop position PS is changed to a position moved by the unit distance D in the minus direction, that is, the direction of the reference position PH. Thereafter, the process returns to S11, and the changed stop position PS of the reading carriage 8 is displayed (S11).
When the end key of the setting key is operated (S
12: end key), the process ends.

When the stop position PS of the reading carriage 8 set as described above is set to a position close to the support portion 5 (see FIG. 1), that is, a position close to the reference position PH, a considerable amount of time is obtained. Read carriage 8 with weight
However, when the reading unit frame 6 is opened, the reading unit frame 6 is always located near the support unit 5. Therefore, the moment required to hold the reading unit frame 6 in an open state can be reduced, the support spring 7 having a small restoring force can be used, and the reading unit frame 6 can be prevented from jumping up. . Therefore, from such a point, the stop position PS of the reading carriage 8 becomes the reference position PH.
It can be said that the closer to, the better.

On the other hand, when the restoring force is reduced due to the deterioration of the support spring 7 over time and the initial restoring force cannot be obtained, the reading carriage 8 is appropriately moved in the direction of the support portion 5, that is, in the direction of the reference position PH. By moving the reading unit frame 6 by an appropriate distance, the moment required for holding the reading unit frame 6 in an open state can be reduced, and adjustment can be performed so as to balance the restoring force of the aged support spring 7. However, when the stop position PS of the reading carriage 8 is set to be very close to the reference position PH, the amount that can be adjusted in this way becomes small, and thus the stop position PS of the reading carriage 8 is separated from the reference position PH to some extent. It is desirable to set the position.

Since the position of the reading carriage 8 when the reading section frame 6 is opened is different each time, the stop position PS of the reading carriage 8 is set to one end of the movable range of the reading carriage 8. In this case, the time from the detection of the opening of the reading unit frame 6 to the completion of the movement of the reading carriage 8 to the stop position PS varies greatly, so that the stop position PS of the reading carriage 8 is set within the movable range. Is desirably set near the central portion of. In the present embodiment, in view of these points, the stop position PS of the reading carriage 8 is set at a position slightly above the reference position PH from the center of the movable range. The stop position PS of the reading carriage 8
Is not limited to this, and an appropriate position can be set in view of the above points.

[0036]

As described above, according to the first aspect of the present invention,
According to the document reading / recording apparatus, when the reading unit frame mounted on the upper surface of the main body frame and supported to be openable and closable is opened, the reading carriage that moves in the horizontal direction inside the reading unit frame Is moved to a predetermined position and stopped, so that the moment required to hold the reading unit frame in an open state becomes constant, so that it is possible to prevent the reading unit frame from jumping up and to optimize the support spring. Since the restoring force is fixed, a simple spring having no additional structure such as a damper can be used as the support spring. Further, even when the reading section frame is lifted and opened, the reading section frame can always be opened with a constant force, so that the reading section frame can be easily and safely opened and closed.

According to the document reading / recording apparatus according to the second aspect of the present invention, in addition to the above-described effects, the drive power of the reading carriage is cut off after the reading carriage is stopped at a predetermined position, thereby enabling the user to perform the operation. When opening the reading unit frame to supply toner to the recording unit, replace the photosensitive drum, perform maintenance such as replacing the paper jam, etc., it is possible to reliably avoid the danger of electric shock. it can.

According to the document reading / recording apparatus according to the third aspect of the present invention, in addition to the above-mentioned effects, the stop position of the reading carriage can be changed by setting.
Even if the initial restoring force cannot be obtained due to the aging of the support spring, the moment required for moving the reading carriage to hold the reading unit frame open is reduced, and the aging of the supporting spring is reduced. It is possible to maintain the open state of the reading unit frame without replacing the supporting spring by adjusting the restoring force to balance with the restoring force.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a document reading and recording apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a document reading and recording apparatus according to the embodiment of the present invention.

FIG. 3 is a block diagram showing a circuit configuration when the document reading and recording apparatus according to the embodiment of the present invention is used in a multifunction facsimile machine.

FIG. 4 is a flowchart showing an operation of the document reading and recording apparatus according to the embodiment.

FIG. 5 is a flowchart illustrating a process for setting a stop position of a reading carriage in the document reading and recording apparatus according to the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 document reading and recording device 2 recording unit 3 body frame 5 support unit 6 reading unit frame 7 support spring 8 reading carriage 9 document reading unit 10 cover open sensor 15 control unit 21 latch PH reference position of reading carriage PP current position of reading carriage PS Stop position of reading carriage PL Limit position of reading carriage

Claims (3)

[Claims] A body frame having a recording unit therein;
A reading unit frame mounted on an upper surface of the main body frame and supported by a supporting unit provided at one end of the upper surface so as to be openable and closable, and a reading unit frame disposed on the supporting unit and urging the reading unit frame upward A reading spring disposed inside the reading unit frame and having a reading carriage that scans a document image while moving in the horizontal direction, wherein the reading carriage is opened when the reading unit frame is opened. A document reading and recording apparatus, wherein the document is moved to a predetermined position and stopped. 2. The document reading and recording apparatus according to claim 1, wherein the drive power of the reading carriage is shut off after the reading carriage stops at a predetermined position. 3. The reading carriage according to claim 1, wherein a stop position of the reading carriage can be changed by setting.
Document reading and recording device according to the description.