JP2001238016A - Mounting structure of guide rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that there is a limit to improve the molding accuracy of a peripheral part such as a chassis and a guide rod and that cost also becomes high even though the molding accuracy and the assembling accuracy of the guide rod and a bracket supporting the guide rod are required to be improved because the distance between a scanner light source and platen glass (origin) has to be maintained to be constant in an image reader. SOLUTION: The image reader 6 makes a scanner 60 scan along the guide rod 61, the device is housed in a chassis 21 made of resin, the guide rod 60 is supported by mounting holes 31 and 32 of the both sides of the chassis, a mounting member 25 for fixing the guide rod to the chassis is provided at one end of the guide rod, and the mounting member is fixed by a plate 23L for supporting platen glass and a common fastning tool 25c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus, and more particularly, to a structure for attaching a guide rod for supporting a scanner to a chassis.

[0002]

2. Description of the Related Art An image reading apparatus is an apparatus for reading an image by scanning a stationary document with a scanner provided in a chassis. Is made of resin. The scanner is slidably supported by a guide rod provided horizontally in the chassis, and a sheet metal bracket is provided in the resin chassis to support the guide rod.

[0003]

In the above-described image reading apparatus, the light source of the scanner and the platen glass (original) are used.
Distance must be kept constant. Therefore, it is required to increase the molding accuracy of the guide rod and the bracket supporting the guide rod, and the assembly accuracy. However, there is a limit in increasing the molding accuracy of the peripheral parts such as the chassis and the guide rod, and There is a problem that the cost increases. In addition, when the chassis that houses the image reading device is made of resin as described above, it is necessary to configure the guide rod, which is a metal component, so that it is not electrically isolated. Is costly, and from the viewpoint of maintainability, it is desirable to prevent the number of members from increasing as much as possible.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, an image reading apparatus configured to read an image by causing a scanner to scan along a guide rod as described in claim 1, wherein the image reading apparatus is housed in a resin chassis, and the guide rod is mounted. It was configured to be supported by mounting holes provided on both sides of the chassis.

According to a second aspect of the present invention, an attachment member for fixing the guide rod to the chassis is provided at one end of the guide rod.

Further, the mounting member is fixed to the platen glass supporting plate by a common fastener.

[0007]

Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a facsimile apparatus which is an embodiment having an image reading apparatus according to the present invention, FIG. 2 is a front sectional view thereof, FIG. 3 is a plan view of a chassis accommodating the image reading apparatus, and FIG. FIG. 5 is a plan view showing a state in which a reinforcing plate is mounted on the upper portion of the chassis. FIG. 6 is a view showing mounting holes provided on the side surfaces of the chassis. FIG. 7 shows a state in which a guide rod is supported by a mounting member. FIG. 8 is a cross-sectional view, and FIG. 9 is a plan view of the reading unit.

First, a schematic configuration of a facsimile apparatus to which the image reading apparatus of the present invention is applied will be described with reference to FIGS. The facsimile apparatus F has a configuration in which a reading unit 2 serving as a reading unit is disposed above the recording unit 1, and the reading unit 2 is vertically rotatable about a rotation fulcrum 20 with respect to the recording unit 1. ing. An image forming apparatus 3 and a paper feed cassette 4 are provided inside the recording unit 1 at the top and bottom, respectively. The paper deposited in the paper feed cassette 4 is fed to the image forming apparatus 3 for recording, and then the recording paper is discharged. It is configured to discharge to the tray 5. In the following description, the arrow A shown in FIG. 1 and the like will be referred to as the front side (front side) of the facsimile apparatus F for convenience.

On the other hand, in the reading unit 2, an image reading device 6 including a scanner 60 and the like is housed in a reading case 13 having a transparent document mounting surface 14 on the upper surface. The original placed on the scanner is scanned by the scanner 60 to perform reading. Also,
A document pressing cover 7 configured to be openable and closable about one side thereof is disposed above the reading case 13, and the document pressing cover 7 presses a document placed on the document mounting surface 14 from above. And

At one end of the document holding cover 7, an automatic sheet feeding device (ADF device) 8 for automatically feeding a document is attached, and the automatic sheet feeding device 8 is controlled by a sheet feeding device 11 and a conveying device 12. It is configured. Then, the originals placed on the original supply tray 9 are picked up one by one by the paper feeding device 11 of the automatic paper feeding device 8, and the ADF reading unit provided at one end of the original loading surface 14 by the transport device 12. 17, the contents are read by the scanner 60, and then discharged to the document discharge tray 10 formed on the upper surface of the document pressing cover 7.

That is, the reading unit 2 is used as a flat bed type scanner for scanning a scanner 60 to read a still original, and is a sheet feed type scanner for reading while feeding the original with the scanner 60 fixed in position. It is configured so that it can be used as.

A key panel 15 is attached to the front of the reading case 13, and by operating various operation keys on the key panel 15, the contents of the document can be read,
A destination for facsimile transmission of the read content is set, and the received content and the read content are recorded by the image forming apparatus 3.

Next, the configuration inside the reading case 13 will be described. As shown in FIG. 2, the reading case 13 houses a resin chassis 21 inside, and the image reading device 6 including the scanner 60 and the like is arranged in the chassis 21. As shown in the plan view of FIG. 3 and the side view of FIG. 4, the chassis 21 has a box shape in which the bottom surface and four side surfaces are integrally formed. The weight is reduced. A reinforcing wing 22 is attached to the front of the chassis 21.

As shown in FIG. 3, the reinforcing wing 22 has a substantially trapezoidal bottom surface 22b in plan view, and ribs 2 provided in a lattice shape.
2r, the side surfaces 22a, 22a are integrally formed of resin, which reinforces the strength of the resin-integrated chassis 21. As shown in FIG. 9, the key panel 15 is provided above the reinforcing wing 22 so that the key panel 15 also serves as a support member.

On both sides on the rear side of the chassis 21, supporting stands 26 are provided. Supporting holes 26a provided in the supporting stands 26, 26a are provided with the document pressing cover 7 not shown. The document holding cover 7 is placed on the chassis 21 by inserting the support pins, and the document holding cover 7 can be opened and closed by a hinge (not shown) provided above the support pins.

As shown in FIG. 5, reinforcing plates 23F, 23B, 23L, 23R (hereinafter, abbreviated as reinforcing plates 23), which are sheet metal plates, are provided on upper portions of front and rear and right and left side surfaces of the chassis 21, respectively. It is attached by the tool. The reinforcing plate 23 has a role as a reinforcing member of the chassis 21 and a role as a support plate for the platen glass 24 constituting the document placing surface 14.

As shown in FIGS. 5 and 9, a guide rod 61 for scanning the scanner 60 is provided horizontally on the rear side of the chassis 21 in the left-right direction. The guide rods 61 are inserted into fitting holes 31 and 32 according to the present invention, which will be described later, provided on both side surfaces of the chassis 21, and are located at the positions of the left and right mounting holes 31 (the left side in this embodiment). It is configured to be fixed to the chassis 21 via a mounting member 25 for positioning.

The reinforcing plate 23F on the front side is shown in FIG.
Is a plate formed in a substantially U-shape in cross section as shown in FIG. 5, and a surface on the upper side of the reinforcing plate 23F is a platen glass support surface 23a for supporting the platen glass 24,
The lower surface is the scanner sliding surface 23 with the scanner 60.
b. On the other hand, as shown in FIG. 4, a guide hole 60a is provided at one end (rear end) of the scanner 60 provided in the front-rear direction in the chassis 21, and a guide rod 61 is inserted into the guide hole 60a. A sliding portion 60b is formed below the other end (front end) of the scanner 60.
The sliding portion 60b is mounted on the scanner sliding surface 23b of the reinforcing plate 23F.

In the above configuration, the motor 63
The scanner 60 driven by (shown in FIG. 9) has one end (rear end) side supported by a guide rod 61,
While the other end (front end) side is supported by the scanner sliding surface 23b, it can move in the left-right direction (scanner moving direction B) as shown in FIG. A still document is read while moving to B. When the automatic paper feeder 8 is used, the movement of the document is stopped at the position indicated by the arrow C, and the conveyed document is read. The scanner 60 has a unit configuration in which a fluorescent tube as a light source, an optical system, a CCD, and the like are provided.
In addition to supplying power to the fluorescent tube (light source), the configuration is such that data photoelectrically converted by the CCD is transmitted to a control unit (not shown) via the harness 62.

Next, the support structure of the guide rod 61 according to the present invention will be described. The mounting hole 31 is shown in FIG.
As shown in FIG. 6, the hole is a substantially circular hole provided on one end side (left side in this embodiment) of the chassis 21, and the hole diameter is larger than the hole diameter of the guide rod 61. On the other hand, the mounting hole 32 is provided on the other end side of the chassis 21 as shown in FIG. 6B, and the opening shape thereof has a shape in which a part of a circle is missing as shown in the figure. On the other hand, one end of the guide rod 61 also has a shape in which a part of a circle is chipped, and the end of the guide rod 61 is fitted to the mounting hole 32 side so as to regulate the rotation of the guide rod 61. .

In such a configuration, the guide rod 6
1 is inserted into the mounting holes 31 and 32 to be laterally installed in the chassis 21, and further, as shown in FIGS. 7 and 8, a mounting member 25 is covered from the outside of the chassis 21. Is fixed to the chassis 21 by bolts 25c that are common fasteners with the reinforcing plate 23L. A screw hole 61a is formed at the end of the guide rod 61.
The position of the guide rod 61 can be finely adjusted since the position of the guide rod 61 can be finely adjusted by aligning the position 1a with the position of the positioning hole 25a provided in the mounting member 25 with the bolt 25b. is there. The bolt 25b also functions as a stopper for the guide rod 61.

Further, if the mounting hole 31 is configured to have a hole diameter corresponding to the tolerance, the mounting of the guide rod 61 and the fine adjustment of the mounting position can be performed without positioning by the mounting member 25. In this case, the mounting member 25 functions only for the purpose of holding the guide rod 61 and improving the gland property, and the positioning can be performed by adjusting the position of the guide rod 61 within the range of the hole diameter of the mounting hole 31. . Further, when the resin is deformed for some reason, the hole diameter of the mounting hole 31 may be increased so that the guide member 61 is positioned and held by the mounting member 25.

As described above, the image reading device 6 is housed in the resin chassis 21 and the guide rod 61 is attached to the chassis 2.
(1) Since the guide rods 61 are supported by the mounting holes 31 and 32 provided on both side surfaces, the guide rod 61 can be easily removed from the inside and outside of the chassis 21. Configuration. Also,
At one end of the guide rod 61, a mounting member 25 for fixing the guide rod 61 to the chassis 21 is provided, so that the guide rod 61 is positioned by a jig from the outside of the chassis 21 so that an accurate position can be determined. It is possible to fix with the bolt 25b in the fitted state, and the assembling accuracy is improved. As a result, it is possible to prevent an error from occurring in the image reading by the scanner 60 and improve the reading accuracy.

The mounting member 25 is fixed to the chassis 21 by bolts 25c which are the same fasteners as the reinforcing plate 23L which is a platen glass supporting plate.
Since the guide rod 61 is connected to the ground side (reinforcement plate 23 side) via the mounting member 25, the entire chassis 21 is made of resin to reduce the weight, and the ground property of the guide rod 61 is enhanced. Configuration. Also, a member connected to the ground side is a guide rod 6.
By also using the mounting member for position determination 1, the number of parts can be reduced and a low-cost configuration can be achieved.

[0025]

As described above, the present invention has the following advantages. That is, an image reading apparatus configured to read an image by causing a scanner to scan along a guide rod as described in claim 1, wherein the image reading apparatus is housed in a resin chassis, and the guide rod is mounted. Since the configuration is such that the guide rods are supported by the mounting holes provided on both sides of the chassis, the guide rod can be easily removed, the parts can be easily replaced, and the maintenance is excellent.

Further, since an attaching member for fixing the guide rod to the chassis is provided at one end of the guide rod, fine adjustment of the positioning of the guide rod can be performed. Accuracy has improved.

Further, since the mounting member is fixed by a common fastener with the platen glass supporting plate, the grounding property of the guide rod is ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a facsimile apparatus as an embodiment having an image reading apparatus according to the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a plan view of a chassis that houses the image reading device.

FIG. 4 is a side sectional view of the same.

FIG. 5 is a plan view showing a state in which a reinforcing plate is attached to an upper portion of the chassis.

FIG. 6 is a view showing a mounting hole provided on a side surface of the chassis.

FIG. 7 is a side view showing a state where the guide rod is supported by the mounting member.

FIG. 8 is a sectional view of the same.

FIG. 9 is a plan view of the reading unit.

[Explanation of symbols]

 21 Chassis 23 Reinforcement Plate 25 Mounting Member 25a Positioning Hole 25b Bolt 25c Bolt (Common Stopper) 60 Scanner 61 Guide Rod

Claims (3)

[Claims] An image reading apparatus configured to read an image by causing a scanner to scan along a guide rod, wherein the image reading apparatus is housed in a resin chassis, and the guide rod is attached to both side surfaces of the chassis. A guide rod mounting structure, wherein the guide rod is supported by a mounting hole provided. 2. The guide rod support structure according to claim 1, wherein an attachment member for fixing the guide rod to a chassis is provided at one end of the guide rod. 3. The guide rod mounting structure according to claim 2, wherein said mounting member is configured to be fixed by a common fastener to said platen glass support plate.