JP2782295B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus, and more particularly, to the structure of a reading unit.

[0002]

2. Description of the Related Art Generally, the structure of a reading section in a facsimile apparatus of this type includes a contact sensor for reading a document, a reading roller for feeding a document in close contact with the contact sensor, and a pressure contact between the reading roller and the contact sensor. The reading roller is rotatably supported by a bearing portion of the frame, while the contact sensor is supported by a cover that can be opened and closed by the frame, and attached to the frame when the cover is closed. Due to the biasing force of the leaf spring, the contact sensor presses against the reading roller to read the document, causing a document jam or the like. When the cover is opened, the contact sensor moves away from the reading roller in conjunction with the cover. It has become.

[0003]

In the structure of the conventional reading unit described above, the reading roller and the contact sensor are supported by different members, so that the contact accuracy between the reading roller and the contact sensor is as follows. Since the manufacturing errors of these different members are accumulated, in order to increase the close contact accuracy, a strict tolerance range for the manufacturing of each component is strictly required.
There is an inconvenience that high-precision parts processing is required, which is not suitable for mass production. In addition, since the adjustment for improving the close contact accuracy must be performed after assembling different members supporting the reading roller and the close contact sensor, there are also problems that the number of adjustment points increases and the adjustment work becomes complicated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned inconveniences or problems, and it is an object of the present invention to provide a facsimile apparatus which requires almost no adjustment of a reading unit and has high adhesion accuracy. Is to provide.

[0005]

In order to achieve the above object, a facsimile apparatus according to the present invention includes a reading unit including a contact sensor for reading a document, and a reading roller for pressing the contact sensor to feed the document. In the facsimile apparatus, a holding bracket having a supporting shaft protruding is attached to both side surfaces of the contact sensor, and a pair of side surfaces formed with a supporting groove for pivotally supporting the supporting shaft of the holding bracket and the rotation shaft of the reading roller. A mounting bracket having a portion is provided, and the contact sensor and the reading roller are mounted on the mounting bracket to form a unit.

[0006]

In the present invention, since the contact sensor and the reading roller are mounted on the mounting bracket which is the same member, a stacking error in assembly due to members other than these two members is eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of a facsimile apparatus according to the present invention, FIG. 2 is an exploded perspective view of a reading unit, FIG. 3 is a front sectional view illustrating a method of assembling the reading unit, and FIG. 5 is a side sectional view for explaining the operation of the reading unit, FIG. 6 is an exploded perspective view of the printing unit, and FIG. 7 is a side sectional view for explaining the operation of the printing unit.

In these figures, a facsimile apparatus denoted by reference numeral 1 has a main body 2 having a facsimile function.
And a display unit 3 for displaying processing contents with a center connected by a communication line. In the upper part of the main body 2,
An original insertion opening 11 formed between the display unit 3 and the display unit 3 is provided. The inserted original 5 is guided by an original guide unit 12 connected to the original insertion opening 11, and a terminal end of the original guide unit 12 is provided. The document is read by a document reading unit 40 composed of a contact sensor 45 and a reading roller 41 provided in the printer 10, and is discharged from a document discharge port 14 formed in the housing 10.

At the center of the front surface of the main body 2, there is provided a roll storage portion 15 formed in a concave shape for storing the roll 16, and the recording paper 17 of the roll 16 is provided with a pair of recording paper guides 125 and 155. And the print head 13
And a printing unit 100 including a platen roller 150
And is discharged from the recording paper discharge port 18. Further, in the main body 2, there are disposed printed boards 20 and 21, a motor 22 serving as a rotation drive source of the reading roller 41 and the platen roller 150, and a power supply 23.

A display panel 31 is provided on the front of the display unit 3. A touch panel 32, a liquid crystal panel 33, and a printed circuit board 34 are provided behind the display panel 31. The display unit 3 is provided with a pair of guide members 36 and 37 constituting the guide unit 12. The display unit 3 is supported by the main unit 2 so as to be openable and closable so as to open the document insertion opening 11 side with its lower end as a center. , This display section 3
By opening, the one guide member 37 also opens the front side of the roll storage portion 15, and the roll 16 can be replaced.

Hereinafter, a detailed configuration of the reading section 40 will be described. The reading unit 40 includes a reading roller 41, a contact sensor 4
5, the mounting bracket 50, the leaf spring 65, and the operation lever 70. A bearing 43 having an outer peripheral surface formed in an H-cut shape is provided on a rotation support shaft 42 of the reading roller 41.
The rotation drive from the motor 22 is transmitted to the rotation support shaft 42 by a gear train (not shown) to rotate the reading roller 41. On both sides of the contact sensor 45,
A substantially L-shaped holding bracket 46 having a stepped support shaft 47 and a receiving portion 48 is attached, and a tongue piece 49 is attached to the center of the back surface.

The mounting bracket 50 includes a pair of side portions 51.
And a connecting portion 52 for connecting the both side surface portions 51 to each other. An opening 54a is provided at the center of the side portion 51, and as shown in detail in FIG. 5 (a), the bearing 54 has the same shape as the bearing 43 and the center axis is shifted by α, and the width is narrower than the bearing 54. The support groove 53 is formed of a gently curved bearing groove 55 formed by the above.
7, a screw hole 58 and a dowel 59 are provided respectively. The connecting portion 52 has a cut and raised piece 6 having a gap h slightly larger than the surface of the connecting portion 52 and a thickness of a leaf spring 65 described later.
0 is cut and raised, and an engagement opening 61 is provided at a root of the cut and raised piece 60, and a cut and raised opening 62 is provided to face the cut and raised piece 60. 63 is a dowel and 64 is a slit.

The leaf spring 65 comprises a base 66 having a narrow end portion 66a and an inclined pressing portion 67.
An engagement protrusion 68 is provided upright at the tip of 6, and a positioning hole 69 is formed in the center. The operation bracket 70 is
The operation plate 71 includes an operation plate 71 on the front side and an operation lever 72 forming a side surface, and the operation plate 71 is formed to have substantially the same length as the close contact sensor 45, although illustration of the left half is omitted. At the center lower surface of the operation lever 72, a contact portion 73 that contacts the receiving portion 48 of the holding bracket 46, a support hole 74 formed at one end, and a regulating piece 7 formed at the other end.
5 is provided.

The reading section 40 is configured as described above, and an assembling method will be described below. First, as shown in FIG. 3A, the leaf spring 65 is attached to the mounting bracket 50.
The engaging projection 68 of the leaf spring 65 is inserted obliquely from above into the cutting opening 62, and the engaging projection 68 is engaged with the engaging hole 61 of the cutting and raising piece 60 from below.
The base 66 is positioned and temporarily mounted on the connecting portion 52 of the mounting bracket 50 so as to extend in the longitudinal direction of the connecting portion 52 as shown by a two-dot chain line in the drawing.

At this time, since the distal end portion 66a of the base portion 66 of the leaf spring 65 is formed to have a narrow width, the leaf spring 65 can be easily inserted into the cut-and-raised hole 62, and the temporarily placed leaf spring 65 is placed.
Since the wide portion of the base 66 is placed on the connecting portion 52, it is sandwiched between the cut-and-raised piece 60 and the connecting portion 52 and is stably placed. Further, the leaf spring 65 as the pressing means is
Since it is arranged to extend in the longitudinal direction of the connecting portion 52,
The space in the longitudinal direction of the contact sensor 45 can be effectively used, and a dead space does not occur and the device does not increase in size as compared with the conventional case where the sensor is arranged in a direction perpendicular to the contact sensor 45. .

Next, as shown in FIG. 1B, the support shaft 47 of the holding bracket is inserted from the opening 54a of the support groove 53, and is inserted and held in the bearing groove 55, as shown by a two-dot chain line. Then, the contact sensor 45 is supported by the mounting bracket 50.
At this time, the tongue piece 49 of the contact sensor 45 is inserted into the slit 64 of the mounting bracket 50 to prevent the contact sensor 45 from rotating around the support shaft 47.

Next, the rotation support shaft 42 of the reading roller 41 is positioned at the bearing 54, and the bearing 43 is attached to the mounting bracket 50.
From the outside of the side portion 51 of the rotary shaft 4 along the axial direction.
2 and fitted in the bearing portion 54, and as shown in FIG. 4C, the reading roller 41 is rotatably supported on both side portions 51 of the mounting bracket 50, and
1 is brought into close contact with the contact sensor 45. At this time, FIG.
As shown in (a), the bearing 43 fitted to the bearing portion 54
Is fixed to the bearing portion 54 with its vertical and horizontal movements restricted, so that the contact sensor 45 is held between the reading roller 41 and the leaf spring 65 so as to be sandwiched. At the same time, the leaf spring 65 is also pressed by the pressing force from above the contact sensor 45 so that the base 66 is brought into contact with the cut-and-raised piece 60 and the surface of the connecting portion 52.
It is pinched and held.

The side surface 51 of the unitized mounting bracket 50 is supported by supporting the contact sensor 45 and the reading roller 41.
Is fitted and fixed to the frame 80 in the facsimile machine 1 by fitting the dowel 59 into the positioning hole 83 and screwing the screw 81 into the screw hole 58. Thereafter, the contact portion 73 of the operation lever 72 is moved to the receiving portion 4 of the holding bracket 46.
8, the sleeve push screw 84 inserted from the mounting hole 82 of the frame 80 is inserted into the support hole 57 and the support hole 74, and is fastened with the nut 76. It is swingably supported.

The operation bracket 7 incorporated as described above
0, as shown in FIG.
The operation plate 71 can be operated from the document discharge port 14, and the operation plate 71 functions as a document discharge guide.

As described above, the leaf spring 65, the contact sensor 45, and the reading roller 4 are attached to the mounting bracket 50.
1 are assembled so as to be stacked from one direction, and the contact sensor 45 is held and assembled by being sandwiched between the leaf spring 65 and the reading roller 41. Therefore, assembly can be performed only by insertion and stacking, and assembly is extremely easy. Becomes In addition, the contact sensor 4
Since the reading roller 41 and the reading roller 41 are supported by the mounting bracket 50, which is the same member, a stacking error due to assembly is eliminated, the adhesion between the contact sensor 45 and the reading roller 41 is improved, and reading errors are reduced.

Next, when the paper jam of the document 5 occurs in the reading section 40 and the jam is removed, the operation bracket 7 is removed.
The operation of separating the contact sensor 45 from the reading roller 41 by 0 will be described. The operation plate 71 is moved from the document discharge port 14 in FIG.
As shown in (b), when pressed downward, the operation lever 7 is pressed.
2 swings counterclockwise about the screw 84, and the abutting portion 73 connects the receiving portion 48 of the holding bracket 46 to the leaf spring 65.
To move the support shaft 47 downward along the bearing groove 55, the contact sensor 45 is separated from the reading roller 41, and the jammed document is removed from the document discharge port 14. Becomes possible.

As described above, since the document discharge port 14 is also used as an operation window when a document is jammed, and the clogged document is removed from the document discharge port, the opening / closing mechanism of the apparatus is not required. The simplification is greatly simplified, the number of parts and the number of assembling steps can be significantly reduced, the size of the apparatus can be reduced, and the usability can be improved. Further, the operation plate 71 can also be used as a document discharge guide, so that a new guide mechanism is not required, so that the number of components can be reduced.

Next, a detailed configuration of the printing unit 100 will be described. The printing unit 100 includes a mounting bracket 110, a leaf spring 122, a pair of upper and lower recording paper guides 125 and 155,
It is roughly composed of a print head 130, an operation bracket 140, and a platen roller 150. The mounting bracket 110 includes a pair of both side surfaces 111 and a connecting portion 112 for connecting the two.
H-shaped bearing portion 114 having 14a and mounting plate 11
5 are provided, and the mounting plate 115 is provided with a guide mounting hole 116 and a mounting hole 117 for mounting to an apparatus frame (not shown). The connecting portion 112 has a mounting hole 1
18, 119 and a slit 120 are formed.

Leaf spring 1 having inclined pressing portion 122a
22 is screwed into the mounting hole 118. The upper recording paper guide 125 includes a mounting portion 126 and a guide portion 127 curved in a side view, and the mounting portion 126 has a mounting hole 119.
And is attached to the mounting bracket 110. A holding bracket 131 having a U-shaped bearing groove 132 and a receiving portion 133 is provided on both side surfaces of the print head 130.
However, a regulating piece 135 having an engaging projection 136 at the tip is attached to the center.

The operation bracket 140 has a pair of side surfaces 141 and 146 provided with U-shaped bearing grooves 142 and 147 and cam portions 143 and 148, respectively, and the front surface of one side surface 141 is extended. An operation section 144 is provided, and forms an operation lever 141. The lower recording paper guide 155 has a guide 156 curved in the same shape as the guide 127 of the upper recording paper guide 125.
And a rectangular window 157 from which the platen roller 150 protrudes.
And one pair of mounting portions 158 and 159. One of the mounting portions 158 is screwed into the mounting hole 116 to be mounted on the mounting bracket 110, and the other mounting portion 159 is provided.
Are attached to a frame of a device (not shown). The rotating shaft 151 of the platen roller 150 has the bearing 11
A bearing 152 having the same outer shape as that of No. 4 is inserted. The rotation from the motor 22 is transmitted to the rotating shaft 151 by a gear train (not shown) to rotate the platen roller 150.

The printing unit 100 is configured as described above, and the assembling method will be described below. First, the rotating shaft 151 of the platen roller 150 inserted from the opening 114 a is positioned in the bearing 114 of the mounting bracket 110 to which the upper and lower recording paper guides 125 and 155 are attached, and the bearing 152 is inserted into the rotating shaft 151. The platen roller 150 is rotatably supported by the mounting bracket 110 by being fitted and fixed to the bearing portion 114. Next, the U-shaped bearing groove 132 of the holding bracket 131 is inserted into the bearing 152, and
The engagement protrusion 136 of the 35 is inserted into the slit 120, and the contact sensor 130 is supported by the mounting bracket 110 so as to face the platen roller 150.

Next, the U-shaped bearing grooves 142 and 147 of both side portions 141 and 146 are inserted into the bearing 152 so that the cam portions 143 and 148 abut the receiving portion 133 of the holding bracket 131, and the operation bracket 155 is attached. It is swingably supported by the mounting bracket 110. Finally, the pressing portion 122
The leaf spring 122 is attached to the mounting bracket 110 by pressing the print head 130 against the platen roller 150 in FIG.
Attach to

As described above, since the print head 130 is directly supported by the bearing 152 of the platen roller 150, a stacking error in assembly does not occur and the print head 13
0 and the platen roller 150 are improved in adhesion, and printing errors are reduced. With respect to the mounting bracket 110, the leaf spring 122, the print head 135, and the platen roller 15
Since the print heads 135 are assembled by being stacked in one direction, and the print head 135 is held and assembled by being sandwiched between the leaf spring 122 and the platen roller 150, assembly can be performed only by insertion and stacking, and assembly is extremely easy. Becomes

Hereinafter, a method of operating the operation bracket 140 will be described. When the recording paper 17 is set in the printing unit 100, or when the recording paper 17 is jammed in the printing unit 100, when the display unit 3 is opened as shown in FIG. Then, the roll storage section 15 is opened. In this state, the operation unit 144 of the operation bracket 140
Is lifted upward in the figure, the operation bracket 140
It swings clockwise around the bearing 152, and the cam portion 1
43 presses the receiving portion 133 upward against the leaf spring 122, moves the print head 130 upward, and separates the print head 130 from the platen roller 150. In this separated state, the recording paper 1
Set 7 or remove the paper jam.

In the second embodiment of the printing portion shown in FIGS. 8 and 9, four cut and raised pieces 167 are cut and raised in the connecting portion 162 of the mounting bracket 160.
An engagement hole 169 is provided at the base of the cut-and-raised portion.
On the other hand, the leaf spring 170 attached to the cut and raised piece 167
Has a base 172 and an inclined pressing portion 171. A convex portion 173 is formed at the center of the base 172, and an L-shaped projection 174 is formed at the tip.

Bearing portions 161a into which the bearings 152 are fitted are provided on both side surfaces 161 of the mounting bracket 160.
A lower recording paper guide (not shown) is mounted on the screw hole 163a of the mounting plate 163, and a mounting bracket is mounted on a frame of an apparatus (not shown) via the screw hole 163b. , An upper recording paper guide (not shown) is attached.

The height h ₁ of the convex portion 173 and the cut and raised piece 1
The gap h between the 67 and the connecting portion 162 is such that when h ₁ > h, the length L ₁ of the base portion 172 and the cut and raised piece 16 from the end face of the connecting portion 162
7, the distance L to the head of the projection 7 is L ₁ > L, and the horizontal projection amount l ₁ of the projection 174 and the distance 1 between the end face of the cut and raised piece 167 and the end face of the cut and raised hole 168 are: l> l ₁ .

The leaf spring 170 configured as described above extends in the longitudinal direction of the connecting portion 162 so that the projection 1 at the distal end thereof extends.
74 is inserted obliquely from above into the cutout opening 168, and the projection 173 is inserted.
Is held between the cut-and-raised piece 167 and the surface of the connecting portion 162, and is engaged with the engaging port 169 to be fixed. The leaf spring 170 is extended in the longitudinal direction of the connecting portion 162 so that the mounting bracket 160
The dead space in the direction orthogonal to the longitudinal direction of the print head 130 is eliminated by fixing the print head 130, and the size of the printing unit can be reduced.

FIG. 10 shows another structure for holding the leaf spring 185. In the third embodiment, the cut-and-raised piece 181 is formed so as to protrude below the mounting bracket 180, and the projection 188 of the leaf spring 185 is cut and raised. Insert from obliquely below the mouth 183 and dowel 18
4, a positioning hole 189 is fitted, an engaging hole 182 is engaged with a projection 188, and the base 187 is held between the cut and raised piece 181 and the back surface of the mounting bracket 180. With such a configuration, it is possible to reduce the height in the height direction as compared with the above-described second embodiment.

[0035]

As described above, according to the present invention, there is provided a pair of support grooves formed on support brackets mounted on both side surfaces of the contact sensor and formed with support grooves for pivotally supporting the support shaft and the rotation shaft of the reading roller. A mounting bracket having side surfaces of the contact bracket and a reading roller are coaxially supported by the mounting bracket, and a stacking error in manufacturing and a stacking error in assembly are eliminated. This makes it extremely easy to adjust the close contact. In addition, since the contact sensor and the reading roller are attached to the mounting bracket, and the reading unit is unitized and independent, restrictions on the shape of the device housing are removed, so that the external appearance of the device can be designed freely. It is possible to increase the target value.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a facsimile apparatus according to the present invention.

FIG. 2 is an exploded perspective view of a reading unit of the facsimile apparatus according to the present invention.

FIG. 3 is a front sectional view showing a method of assembling a reading unit of the facsimile apparatus according to the present invention.

FIG. 4 is a back sectional view of a reading unit of the facsimile apparatus according to the present invention.

FIG. 5 is a side sectional view showing an operation state of a reading unit of the facsimile apparatus according to the present invention.

FIG. 6 is an exploded perspective view of a printing unit of the facsimile apparatus according to the present invention.

FIG. 7 is a side sectional view showing an operation state of a printing unit of the facsimile apparatus according to the present invention.

FIG. 8 shows a second example of a printing unit of the facsimile apparatus according to the present invention.
FIG. 3 is an exploded perspective view showing the embodiment of FIG.

FIG. 9 shows a second example of the printing unit of the facsimile apparatus according to the present invention.
(A) is a perspective view of a main part, and (b) is a back sectional view.

FIGS. 10A and 10B show a printing section of a facsimile apparatus according to a third embodiment of the present invention, wherein FIG. 10A is a perspective view of a main part, and FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 facsimile apparatus 5 document 11 document insertion port 14 document discharge port 17 recording paper 18 recording paper discharge port 40 reading unit 41 reading roller 45 contact sensor 50 mounting bracket 65 leaf spring 70 operation bracket 100 printing unit 110 mounting bracket 122 leaf spring 130 printing Head 140 Operation bracket 150 Platen roller 160 Mounting bracket 170 Leaf spring 180 Mounting bracket 185 Leaf spring

Claims (1)

(57) [Claims] 1. A facsimile apparatus having a reading unit including a contact sensor for reading a document and a reading roller for pressing the contact sensor to send the document, a holding bracket having a support shaft protruding from both side surfaces of the contact sensor. And attach
A mounting bracket having a pair of side surfaces formed with a support groove for pivotally supporting the support shaft of the holding bracket and the rotation shaft of the reading roller, and attaching the close contact sensor and the reading roller to the mounting bracket; A facsimile machine characterized in that