JPH11205542A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assemblability and positioning accuracy of components and to shorten assembling work and detachment work time by making one surface of the case body of an image reader attachable and detachable and providing a driving unit for scanning-driving a scanning unit on the inner side of the surface. SOLUTION: This image reader is mounted on an image formation device for forming images read by the image reader on transfer paper and at least one surface 10a among the front, near, left and right surfaces of the case body of the image reader is made attachable and detachable. For instance, one surface 10a positioned on a front right side is made attachable and detachable in a direction horizontal to the other two surfaces of the case body. Then, on the inner side of the surface 10a, the driving unit 30 for scanning-driving the scanning unit 20 is provided. The driving unit 30 is mainly constituted of a driving motor 31 as a drive source for making the scanning unit 20 travel back and forth and a belt 33 as a drive transmission member for driving the scanning unit 20 by the driving force of the driving motor 31.

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 is applicable to a copying machine, a facsimile, a scanner, and the like.

[0002]

2. Description of the Related Art The housing of a conventional image reading apparatus has a box shape in which a plurality of parts are connected by welding, rivets, or the like. Therefore, components such as a lens, a mirror, a drive system, an imaging system, and a lamp are assembled into the housing from above the housing. Also, at the time of maintenance, the parts are removed from above the housing and maintenance is performed.

[0003]

However, since there are a document table and an automatic document feeder unit at the upper part of the housing, it is difficult to assemble and remove from the upper part of the housing. Parts such as pulleys require skilled work skills and work time of workers. In addition, components of the drive system and guide members are usually mounted inside the side of the housing, but since high positional accuracy is required, it is extremely difficult to assemble and remove from the top of the housing. In addition, a skilled work skill and work time of the worker are required.

When an image reading apparatus is mounted on an image forming apparatus and the image reading apparatus and the image forming apparatus are integrally formed, an operator must perform the above operation from a considerably high position. However, there is a problem that the work efficiency is extremely low and the work time is long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and makes it possible to attach and detach one surface of a housing of an image reading apparatus to improve the assembling property and positional accuracy of parts. It is another object of the present invention to provide an image reading apparatus capable of shortening an assembling work and a removing work time. Further, according to the present invention, by providing the drive unit and the guide member inside the detachable one surface, the assembling work and the removing work of the operator can be made easier and the working time can be shortened. It is an object to provide an image reading device. Further, the present invention provides an image reading apparatus in which a drive unit and a guide member are integrated, and a scanning unit is detachably attached to the drive unit and a guide member, thereby improving the assembling property and maintenance of parts. The purpose is to provide.

[0006]

According to the first aspect of the present invention,
In an image reading apparatus that scans by illuminating a document, at least one surface of a housing of the image reading apparatus is detachable, and a driving unit that scans and drives a scanning unit is provided inside the one surface. .

According to a second aspect of the present invention, in the first aspect of the present invention, the one surface is attached and detached in a horizontal direction.

According to a third aspect of the present invention, in the first aspect, a guide member for guiding the scanning of the scanning unit is provided inside the one surface.

According to a fourth aspect of the present invention, in the first aspect of the present invention, an image forming portion is provided inside the one surface.

According to a fifth aspect of the present invention, there is provided an image reading apparatus for scanning a document by illuminating the original, wherein the guide member for guiding the scanning unit to scan and the driving unit for scanning and driving the scanning unit are integrated. Wherein the scanning unit is detachable from the scanning drive unit, at least one surface of a housing of the image reading device is detachable, and the scanning drive unit is provided inside the one surface. It is characterized by.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, the guide member is a linear ball rolling slide rail.

According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the scanning unit illuminates and scans a document with a first scanning unit, and the first scanning unit is differentiated with respect to the first scanning unit to set an optical path length. A second scanning unit that keeps constant, wherein the first scanning unit is connected to a drive transmission member, and the second scanning unit is driven by the first scanning unit.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the second scanning unit has a pair of moving pulleys and a drive transmission member hung on the pair of moving pulleys,
A part of the drive transmission member is immovably fixed, and another part of the drive transmission member is connected to the first scanning unit.

According to a ninth aspect of the present invention, in the seventh aspect, the second scanning unit is urged in a direction pressed against the guide member.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an image reading apparatus according to the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes an image reading device that illuminates and scans a document. As shown in the figure, the image reading apparatus 1 is mounted on an image forming apparatus 2 that forms an image read by the image reading apparatus 1 on a transfer sheet.

FIG. 2 shows a housing 10 of the image reading apparatus 1. As shown in FIG. 2, a housing 10 of the image reading apparatus 1 is formed in a box shape having an open upper surface, and a contact glass (not shown) on which an original is placed is provided on the open upper surface. Can be attached. At least one of the front, rear, left and right surfaces of the housing 10 is detachable. In FIG. 2, one surface 10a located on the front right side is horizontally detachable from the other two surfaces 11a and 12a of the housing 10. The detachable one surface 10a is the entire surface of the image reading device 1 in consideration of operability at the time of maintenance and the like.

As shown in FIG. 2, another two surfaces 1 of the housing 10 are provided.
The upper end 11c, 12c and the lower part 11d, 12d are bent at substantially right angles toward the inside of the housing 10 at one end of each end of 1a, 12a which is in contact with one surface 10a. Lower part 11d, 12d
Are formed with screw holes f, respectively. The axial direction of the screw hole f is the same horizontal direction as the attaching / detaching direction of the one surface 10a.

Further, one surface 1 of the other two surfaces 11a and 12a
At one end in contact with 0a, two projections 11b and 12b are formed in the vertical direction, respectively, by cutting off a central portion between the upper portions 11c and 12c and the lower portions 11d and 12d. These projections 11b, 12b
As will be described later, they are fitted into respective square holes 10c formed on the detachable one surface 10a.
The protrusions 11b and 12b are for positioning one surface 10a and attaching it to the other two surfaces 11a and 12a of the housing 10.

Next, the other two surfaces 11a, 12a of the housing 10
The one surface 10a that can be attached to and detached from is described in detail. As shown in FIG. 2, both ends 10 of this one surface 10a are
b and 10b are each bent at a substantially right angle toward the side in contact with the other two surfaces 11a and 12a of the housing 10,
The inner surface of each end portion 10b is connected to the other two surfaces 1 of the housing 10.
It comes in contact with each outer surface of 1a and 12a.

On one surface 10a, holes 10d are formed at the four corners near the bent portions of both ends 10b and 10b, respectively. The axial direction of these holes 10d is the same horizontal direction as the attaching / detaching direction of the one surface 10a. Each of the holes 10d has upper portions 11c, 12c formed at one end of the other two surfaces 11a, 12a.
And the screw holes f of the lower portions 11d and 12d, respectively, and the screw 15 inserted into each hole 10d is screwed into each screw hole f. Thus, the screw 15
Is screwed in from the same horizontal direction as the attaching / detaching direction of the one surface 10a, and the one surface 10a is connected to the two surfaces 11a and 12a to form the housing 10.

Further, both ends 10b, 10b of one surface 10a
A square hole 10c is formed in the vicinity of the bent portion 10a and in the vicinity of the hole 10d located in the vertical direction. The square hole 10c has the protrusion 11b,
12b are fitted respectively. By fitting the projections 11b and 12b into the square holes 10c, one surface 10a is connected to the other two surfaces 11a
12a.

When attaching the one surface 10a to the housing 10, first, while moving the one surface 10a in the horizontal direction,
The inner surface of each end 10b of one surface 10a is brought into contact with the outer surface of each of the other two surfaces 11a and 12a of the housing 10, and the protrusion 1 formed at one end of the other two surfaces 11a and 12a.
1b and 12b are formed in square holes 10 formed on one surface 10a.
c. By this, one side 10a
Is positioned with respect to the other two surfaces 11a and 12a of the housing 10.

In this state, the hole 10d formed on one surface 10a and the screw holes f of the upper portions 11c, 12c and the lower portions 11d, 12d of the other two surfaces 11a, 12a respectively overlap, and this polymerization is performed. By attaching the screws 15 to the holes thus formed from the horizontal direction, one surface 10a can be fixedly attached to the other two surfaces 11a and 12a of the housing 10.

On the other hand, when removing the one surface 10a from the housing 10, the screws 15 are removed from the holes 10d and the screw holes f, respectively, and the projections 11b, 12b formed at one end of the other two surfaces 11a, 12a. Are removed from the square holes 10c formed on the one surface 10a, respectively.
The one surface 10a can be easily removed from the housing 10.

As described above, the housing 1 of the image reading device 1
By making the one surface 10a of the housing 10 detachable from the housing 10, maintenance of each component provided inside the housing can be easily performed. In addition, by making the attachment / detachment direction of the one surface 10a horizontal, when the one surface 10a is assembled, the one surface 10a can be easily positioned, and the one surface 10a can be easily attached.
Work efficiency can be improved. The number of detachable surfaces is not limited to one, but may be plural.

Further, in the above-described example, the projection is formed on the other two surfaces 1.
Although a square hole is formed on one surface 10a at one end of 1a, 12a, a protrusion may be formed on one surface 10a, and a square hole may be formed on the other two surfaces 11a, 12a. The number of the protrusions and the number of the square holes may be any number as long as the positioning of the one surface 10a can be performed.

Various components can be attached to the one surface 10a as described later. Hereinafter, a specific description will be given. As shown in FIG. 3, inside the one surface 10a,
A drive unit 30 that scans and drives the scanning unit 20 is provided. The drive unit 30 includes a drive motor 31 as a drive source for reciprocating the scanning unit 20.
And a belt 33 as a drive transmission member for driving the scanning unit 20 by the driving force of the drive motor 31.

As shown in FIGS. 2 and 3, the drive motor 31 has its base mounted outside the surface 10a, and the drive shaft of the drive motor 31 is disposed inside the surface 10a. However, the base of the motor 31 may be arranged inside the one surface 10a. The driving force of the driving motor 31 is transmitted through an appropriate transmission mechanism (not shown) connected to the driving shaft of the driving motor 31 so that the belt 3
3 so that the belt 33 is driven.

As shown in FIG. 3, the belt 33 is arranged in a substantially annular shape along the inside of the one surface 10a by a plurality of pulleys attached to the inside of the one surface 10a. The motor can be driven to rotate by the transmitted driving force of the driving motor 31.
This belt 33 is for driving the scanning unit 20 as described above.

A guide member 40 is provided inside the one surface 10a in addition to the drive unit 30. The guide member 40 guides the scanning of the scanning unit 20. As shown in FIG. 3, the guide member 40 is a long member extending in parallel to the traveling direction α of the scanning unit 20, and has a C-shaped cross section. The guide member 40 is fixed inside the one surface 10a by an appropriate fixing means.

The scanning unit 20 includes the first scanning unit 2
The first scanning unit 21 illuminates and scans a document placed on a contact glass attached to the upper surface of the housing 10.
It mainly comprises a light source 21a for illuminating the document and a first mirror (not shown) for reflecting light reflected from the document to the side.

The second scanning unit 22 mainly includes a second mirror 22a for reflecting the light reflected by the first mirror downward, and a third mirror (not shown) for turning the light reflected by the second mirror sideways. Is configured. The second scanning unit 22 runs at half the speed of the first scanning unit 21 so as to follow the first scanning unit 21. That is, the second scanning unit 22
Is for keeping the optical path length constant by making a difference with respect to the first scanning unit 21.

The first scanning unit 21 has one end connected to the belt 33 and slidably attached to the guide member 40, and the other end mounted on an appropriate guide frame (not shown). Has been supported. The second scanning unit 22 has one end slidably mounted on the guide member 40 and the other end mounted and supported on an appropriate guide frame (not shown). further,
The second scanning unit 22 is cooperated with the first scanning unit 21 via an adjustment means such as a belt (not shown) so that the second scanning unit 22 can travel at a speed half the traveling speed of the first scanning unit 21. I have.

Accordingly, when the belt 33 is driven by the driving force of the drive motor 31, the first scanning unit 21 having one end connected to the belt 33 is guided by the guide member 40 to scan and travels in the α direction. During this traveling, the other end of the first scanning unit 21 slides on the guide frame, so that the first scanning unit 21 can travel stably. Further, the second scanning unit 22 which is linked to the first scanning unit 21 with the intervention of the adjusting means,
As the first scanning unit 21 travels, the guide member 40 scans and travels in the α direction at a speed that is half the traveling speed of the first scanning unit 21. During this traveling, the other end of the second scanning unit 22 slides on the guide frame similarly to the first scanning unit 21, so that the second scanning unit 22 can travel stably.

As shown in FIG. 3, an image forming section 50 is provided inside one surface 10a in addition to the drive unit 30 and the guide member 40. More specifically, as shown in FIG. 3, one surface of the support plate 51 having an L-shaped cross section is screwed to the right side inside the one surface 10 a.
Is attached inside the one surface 10a. On the other surface of the support plate 51, one end of a mounting plate 52 to which the imaging unit 50 is mounted is attached by a screw 52a.

The image forming section 50 is illuminated by the light source 21a of the first scanning unit 21, and the first mirror of the first scanning unit 21, the second mirror 22a of the second scanning unit 22, and the third mirror in this order. An image forming lens (not shown) for forming an image of the reflected document light reflected by the document, and an image pickup device arranged on the image forming surface are provided. As this imaging device, for example, a line sensor including a charge imaging device (CCD) or the like can be used. The imaging element receives reflected light from the document surface formed by the imaging lens and photoelectrically reads image information of the document.

As described above, since the drive unit 30 including the drive motor 31 and the belt 33 is provided inside the one surface 10a detachable from the housing 10, the assemblability and the position of the drive unit 30 are provided. Accuracy can be improved. In addition, the time required for assembling, removing, and maintaining the drive unit 30 by the operator can be reduced, and the working time can be reduced.

One surface 1 detachable from the housing 10
0a, the guide member 4 in addition to the drive unit 30
Since 0 is provided, the assemblability and positional accuracy of the guide member 40 can be improved. Further, the assembling work, the removing work, and the maintenance time of the guide member 40 can be reduced.

One surface 1 detachable from the housing 10
0a, the drive unit 30 and the guide member 40
In addition to the above, the image forming unit 50 is provided.
Can be improved in assemblability and positional accuracy. In addition, it is possible to reduce the time required for assembling, removing, and maintaining the imaging unit 50. Furthermore, the positional accuracy of the drive unit 30, the guide member 40, and the imaging unit 50 can be improved.

Next, another embodiment will be described.
Note that, for convenience of explanation, the same reference numerals as those used in the above embodiment may be used for the same members and the like as in the above embodiment. The drawings used in the above embodiments may be referred to.

As shown in FIG. 4 and FIG.
Is detachable in the horizontal direction with respect to the housing 10 of the image reading device 1 (see FIG. 2), similarly to the above-described embodiment. Can be made in the same manner as described above. As will be described later, a scanning drive unit 60 in which a drive unit 30 that scans and drives the scanning unit 20 and a guide member 40 that guides the scanning unit 20 to scan is provided inside the one surface 10a. . The scanning unit 20 is provided detachably with respect to the scanning drive unit 60.

As shown in FIGS. 4 and 5, the driving unit 30 includes a driving motor 31 as a driving source for reciprocating the scanning unit 20, a transmission mechanism 32 for transmitting a driving force of the driving motor 31, It mainly comprises a toothed belt 33 as a drive transmission member for driving the scanning unit 30 with the driving force transmitted by the transmission mechanism 32.

As shown in FIG. 4, the drive motor 31 has its base mounted outside the surface 10a, and the drive shaft of the drive motor 31 is disposed inside the surface 10a. Again, the main body of the drive motor 31 has one surface 10a.
It may be attached inside. A drive gear 31a is mounted on a drive shaft of the drive motor 31, and a toothed transmission belt 32a, which is a part of the transmission mechanism 32, is hung on the drive gear 31a.

The transmission mechanism 32 includes a transmission belt 32a.
And a gear 32b integrally formed with a small-diameter gear 32b 'at the upper part thereof.
Is hung on the drive gear 31a and the gear 32b. A small-diameter gear 32b 'formed by being superimposed on the upper part of the gear 32b is engaged with a part of the belt 33. Accordingly, the driving force of the driving motor 31 is transmitted to the belt 33 via the transmission mechanism 32, and the belt 33 is driven by this.

The belt 33 is for driving the scanning unit 20 as described above, and includes a plurality of pulleys and the gears 32 mounted inside one surface 10a.
b ′, it is disposed in a substantially annular shape along the inside of the one surface 10a, and as described above, the gear 32 of the transmission mechanism 32
The drive motor 31 is driven to rotate by the drive force of the drive motor 31 transmitted to b ′.

As described above, the guide member 40 is for guiding the scanning of the scanning unit 20. As shown in FIG. 5, the guide member 40 is provided inside the one surface 10a integrally with the driving unit 30. The guide member 40 can be attached to the inside of the one surface 10a integrally with the drive unit 30 by appropriate fixing means (not shown).

As the guide member 40, a so-called linear ball rolling slide rail can be used.
The base body is a long one extending in parallel to the traveling direction α of the scanning unit 20, and its cross section is C
It is formed in a character shape. FIG. 6 shows an enlarged cross section of the guide member 40. As shown in FIG. 6, a plurality of balls 41 are arranged in a row in a longitudinal direction (α direction shown in FIG. 5) in guide portions 40a and 40b which are formed by bending the base of the guide member 40 up and down. The balls 41 are rotatably held by a second sliding member 62 integrally attached to the second scanning unit 22.

As shown in FIGS. 6 and 14, the second sliding member 62 is a plate-like member having the above-mentioned ridges 62a extending in the longitudinal direction at the upper and lower central portions.
c are bent at approximately 45 degrees, and the holes 6 into which the balls 41 fit are fitted to the bent upper end 62b and lower end 62c.
2d is a plurality formed in the longitudinal direction.
A part of the ball 41 is fitted into each hole 62d to support the ball 41, so that the ball 41
0 are respectively disposed in the curved guide portions 40a and 40b. In addition, the second sliding member 62 is in this state,
The guide member 40 can slide in the longitudinal direction. The second sliding member 62 is integrally attached to the second scanning unit 22 as described later.

Among the balls 41 arranged in the longitudinal direction, some of the balls 41 are supported by a first sliding member 61 integrally attached to the first scanning unit 21. As shown in FIGS. 6 and 14, the first sliding member 61 has a U-shaped cross section in which an upper end 61 b and a lower end 61 c are bent at approximately 90 degrees, respectively, and has two or three balls 41. It is a plate-like member having a certain width in the longitudinal direction so that it can be engaged. This first
The tip of the upper end 61b and the lower end 61c of the sliding member 61
The curved portion is formed so as to be able to come into contact with a part of the surface of the ball 41.
The first sliding member 61 is supported by the ball 41 while being in contact with a part of the surface of the ball 41 disposed in each of the curved guide portions 40a and 40b. On the other hand, it can slide in the longitudinal direction. The first sliding member 61 is integrally attached to the first scanning unit 21 as described later.

The scanning unit 20, as shown in FIG.
It comprises a first scanning unit 21 and a second scanning unit 22. The first scanning unit 21 illuminates and scans a document placed on a contact glass (not shown) attached to the upper surface of the housing 10. As shown in FIG. 8, a light source 21a illuminates the document. And a first mirror 21b and a light source 21a that reflect light reflected from the original document to the side.
And a reflection plate 21c that reflects the illumination light toward the original. FIG. 8A is a perspective view of the first scanning unit 21 partially omitted, and FIG. 8B is a side view of the first scanning unit 21. FIG. 9 shows the front of the first scanning unit 21.

As shown in FIGS. 7 and 9, a projection 21f is formed at a lower portion of one end (right side in the figure) of the base of the first scanning unit 21. This projection 21f
Is mounted on a guide frame 23 extending in parallel with the guide member 40 (see FIG. 5). More specifically, the guide frame 23 has a U-shaped cross section, and the protrusion 21f is placed on the upper end 23a. In this manner, one end side (the right side in the figure) of the base of the first scanning unit 21 is supported by the guide frame 23.

As shown in FIGS. 9 and 10, a first support member 21d having a substantially L-shaped cross section is integrally formed below the other end (left side in FIG. 9) of the base of the first scanning unit 21. Installed. One piece of the first support member 21d is
It is mounted integrally with the first sliding member 61. That is, the other end side (the left side in FIG. 9) of the base body of the first scanning unit 21 is supported by the guide member 40 via the first support member 21d and the first sliding member 61. The other piece of the first support member 21d attached to the lower portion on the other end side (the left side in FIG. 9) of the base of the first scanning unit 21 is formed in a step shape, and is formed in this step shape. A part of the belt 33 is detachably attached to a portion where the belt 33 is located. Thus, the first scanning unit 21
Are connected to a belt 33 as a drive transmission member. Therefore, the first scanning unit 21 includes the guide member 40
The scanning is driven by the driving of the belt 33 while being guided in the α direction (see FIG. 7) which is the scanning direction.

As shown in FIGS. 7, 11 and 12, the second scanning unit 22 includes a second mirror 22a for reflecting the light reflected by the first mirror downward, and a side mirror for reflecting the light reflected by the second mirror. And a third mirror 22b that is folded back to the center. The second scanning unit 22 runs at half the speed of the first scanning unit 21 so as to follow the first scanning unit 21. That is, the second scanning unit 22 is different from the first scanning unit 21 to keep the optical path length constant.

As shown in FIGS. 7 and 12, a protruding portion 22f is formed at a lower portion of one end (the right side in the drawing) of the base of the second scanning unit 22. This projection 22f
Is mounted on the lower end 23b of the guide frame 23. That is, one end side (the right side in the figure) of the base of the second scanning unit 22 is supported by the guide frame 23.

As shown in FIGS. 7, 11 to 14,
On the other end side (the left side in FIG. 12) of the mother body of the second scanning unit 22, two engagement portions 22c are provided at intervals in the α direction (see FIG. 7). The engaging portion 22c has a substantially L-shaped cross section, and a concave portion 22c ″ is formed below the piece 22c ′ along the α direction.
The concave portion 22c "is on the base of the guide member 40 and is engaged with the curved guide portion 40a.
By this engagement, the other end side (the left side in FIG. 12) of the mother body of the second scanning unit 22 is supported.

A hole 22d is formed near the other end (left side in FIG. 12) of the base of the second scanning unit 22 where the engaging portion 22c is formed.
A screw 25 is inserted into the second sliding member 62, and the tip of the screw 25 is screwed into a second support member 22g having an L-shaped cross section attached to the convex 62a of the second sliding member 62. Further, the screw 25 is provided with the second scanning unit 22.
A winding spring 25a is attached by being urged in the vertical direction between the other end of the base member and the second support member 22g.

Accordingly, the other end of the base body of the second scanning unit 22 is supported by the guide member 40 via the screw 25, the second support member 22g, and the second sliding member 62, and the one piece 22c is provided. 'Recess 22c "and guide member 4
0 and is also supported by the guide member 40 by engagement with the curved guide portion 40a. Further, the second scanning unit 22 is stably supported by being biased by the biasing force of the winding spring 25a in a direction pressed against the guide member 40. Further, since the second sliding member 62 can slide with respect to the guide member 40, the second scanning unit 22 is in the scanning direction while being supported by the guide member 40 as described above. It is guided in the α direction (see FIG. 7).

As described above, the second scanning unit 22 performs the first scanning by the adjusting means 70 described later so that the second scanning unit 22 can travel at half the traveling speed of the first scanning unit 21. It is connected to the unit 21.
With this connection, the second scanning unit 22 scans at a speed half the traveling speed of the first scanning unit 21 while being supported and guided by the guide member 40 with the driving of the first scanning unit 21. can do.

As shown in FIGS. 11, 12 and 15, the adjusting means 70 includes a pair of moving pulleys 71a and 71b,
It mainly comprises a belt 72 as a drive transmission member hung on the pair of moving pulleys 71a, 71b. As shown in FIG. 11, the pair of moving pulleys 71a and 71b
The second scanning unit 22 is attached so as to be rotatable at both ends (left and right ends in FIG. 11) of the mother body so that the second scanning unit 22 can be engaged.

As shown in FIG. 15, a part of the belt 72 is fixedly attached to a part 10g of the housing 10 (see FIG. 2) so as not to be movable. It is connected to the base of the first scanning unit 21. A part of the belt 72, a part 10g of the housing 10, and the base of the first scanning unit 21 can be connected by, for example, a clamp member.

When the first scanning unit 21 is driven to scan at the speed V, the belt 72 partially connected to the base of the first scanning unit 21 is rotated at the same speed V as the traveling speed V of the first scanning unit 21. However, since the belt 72 is hung on the pair of moving pulleys 71a and 71b, the second
The scanning unit 22 is driven to scan at a traveling speed that is の of the traveling speed V of the first scanning unit 21.

The first scanning unit 2 described so far
Scanning unit 20 including first and second scanning units 22
As described above, the drive unit 30 and the guide member 40
Are detachable from the scanning drive unit 60 in which are integrated. The first scanning unit 21 includes a belt 33
And the first support member 21d, and by disengaging the ball 41 from the first slide member 61 integrally attached to the first support member 21d (see FIG. 9 and the like), the scanning drive unit 60 Can be removed from On the other hand, the second scanning unit 22 includes an engaging portion 22c and a guide portion 40a which is on the base of the guide member 40 and is curved.
And disengage the screw 25 from the second support member 22g.
By removing from the scanning drive unit 60 (see FIG. 13 and the like), the scanning drive unit 60 can be removed.

Therefore, the drive unit 30 and the guide member 4
0 is integrated with the scanning drive unit 60 on one surface 10a.
Can be removed together with the scanning drive unit 6
Thus, it is possible to improve the ease of assembling, maintenance, and the like. Further, since the drive unit 30 and the guide member 40 are integrated, the number of assembly parts can be reduced, and the cost can be reduced.

Since the guide member 40 is a linear ball rolling slide rail, the sliding friction generated when the scanning unit 20 scans can be reduced, and the scanning unit 20 can be prevented from rattling during scanning. And the scanning travel of the scanning unit 20 can be performed with high accuracy.

Further, the first scanning unit 21 is connected to the belt 33
And the second scanning unit 22 is driven by the first scanning unit 21, so that it is only necessary to assemble the assembled units.
The ease of assembly and maintenance of the unit can be improved, the number of assembled parts can be reduced, and the cost can be reduced. In particular, the second scanning unit 22 is provided with a pair of moving pulleys 71a and 71b and a belt 72 as a drive transmission member that is hung on the pair of moving pulleys 71a and 71b. By connecting to one scanning unit 21, the assemblability and maintainability of the unit can be further improved, and the number of assembled parts can be reduced.
Costs can be reduced.

Further, as shown in FIG. 13 and the like, the second scanning unit 22 is biased in a direction of pressing against the guide member 40 by the biasing force of the winding spring 25a.
It is possible to prevent the scanning unit 20 from falling off during transportation or impact. In addition, it is possible to reduce the sliding friction generated when the scanning unit 20 scans, and to prevent the scanning unit 20 from rattling while scanning, thereby performing the scanning movement of the scanning unit 20 with high accuracy. be able to.

[0067]

According to the first aspect of the present invention, in an image reading apparatus for illuminating and scanning a document, at least one surface of a housing of the image reading device is detachable, and a scanning unit is provided inside the one surface. Since the scanning drive unit is provided, the assemblability and position accuracy of the drive unit can be improved. In addition, it is possible to reduce the operation time for assembling, removing, and maintaining the drive unit. Furthermore, maintenance of each component provided inside the housing can be easily performed.

According to the second aspect of the present invention, in the first aspect of the present invention, since the one surface is attached and detached in a horizontal direction, the one surface can be easily positioned when the one surface is assembled. Mounting on one side can be easily performed, and the work efficiency of assembly and maintenance can be improved.

According to the third aspect of the present invention, in the first aspect of the present invention, since the guide member for guiding the scanning unit for scanning is provided inside the one surface, the assemblability and positional accuracy of the guide member are provided. Can be improved.
Further, it is possible to reduce the work time for assembling, removing, and maintaining the guide member.

According to the fourth aspect of the present invention, in the first aspect of the present invention, since the imaging portion is provided inside the one surface, the assemblability and the positional accuracy of the imaging portion are improved. be able to. In addition, it is possible to reduce the work time for assembling, removing, and maintaining the imaging unit. Furthermore, it is possible to improve the positional accuracy of the drive unit, the guide member, and the imaging unit with respect to each other.

According to the fifth aspect of the present invention, in an image reading apparatus for illuminating and scanning a document, a guide member for guiding the scanning unit to scan and a driving unit for scanning and driving the scanning unit are integrated with the scanning unit. A driving unit, wherein the scanning unit is detachable from the scanning driving unit, at least one surface of a housing of the image reading device is detachable, and the scanning driving unit is provided inside the one surface. Therefore, it is possible to improve the ease of assembly and maintenance of the scanning drive unit. Further, since the drive unit and the guide member are integrated, the number of assembled parts can be reduced, and the cost can be reduced.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, since the guide member is a linear ball rolling slide rail, the sliding friction generated when the scanning unit scans is reduced. In addition to this, it is possible to prevent rattling of the scanning movement of the scanning unit, and it is possible to perform the scanning movement of the scanning unit with high accuracy.

According to a seventh aspect of the present invention, in the fifth aspect of the present invention, the scanning unit includes a first scanning unit for illuminating and scanning the original, and an optical path that is differential with respect to the first scanning unit. A second scanning unit for keeping the length constant, wherein the first scanning unit is connected to a drive transmission member, and the second scanning unit is driven by the first scanning unit. Since it is only necessary to assemble the units, the assemblability and maintainability of the unit can be improved, and the number of assembled parts can be reduced, and the cost can be reduced.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, the second scanning unit has a pair of moving pulleys and a drive transmission member hung on the pair of moving pulleys, A part of this drive transmission member is fixed immovably,
Since the other part of the drive transmission member is connected to the first scanning unit, assemblability and maintainability of the unit can be further improved, and the number of assembled parts can be reduced, thereby reducing costs. be able to.

According to the ninth aspect of the present invention, in the invention of the seventh aspect, the second scanning unit is urged in a direction pressed against the guide member, so that the second scanning unit can be transported or impacted. It is possible to prevent the scanning unit from falling off. In addition, it is possible to reduce sliding friction generated during scanning traveling of the scanning unit, and to prevent rattling of the scanning traveling of the scanning unit,
The scanning travel of the scanning unit can be performed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an example of an image reading apparatus mounted on an image forming apparatus.

FIG. 2 is a perspective view showing an example of a housing of an image reading apparatus applicable to the present invention.

FIG. 3 is a partially omitted perspective view showing an embodiment of the image reading apparatus according to the present invention.

FIG. 4 is a perspective view showing an example of a drive unit attached to a detachable surface in the embodiment.

FIG. 5 is a diagram showing another embodiment of the image reading apparatus according to the present invention.

FIG. 6 is a cross-sectional view illustrating an example of a guide member applicable to the embodiment.

FIG. 7 is a plan view showing an example of a scanning unit applicable to the embodiment.

8A is a cross-sectional view illustrating an example of a first scanning unit applicable to the above embodiment, and FIG. 8B is a partially omitted perspective view.

FIG. 9 is a front view showing the first scanning unit.

FIG. 10 is an enlarged cross-sectional view showing a connection portion between the first scanning unit and a guide member.

FIG. 11 is a perspective view showing a second scanning unit applicable to the embodiment.

FIG. 12 is a front view showing the second scanning unit.

FIG. 13 is an enlarged sectional view showing a connecting portion between the second scanning unit and a guide member.

FIG. 14 is a sectional view taken along the line AA in FIG.

FIG. 15 is a schematic diagram illustrating an example of a drive transmission member of the second scanning unit.

DESCRIPTION OF SYMBOLS 1 Image reading device 2 Image forming device 10 Housing 10a One surface 20 Scanning unit 21 First scanning unit 22 Second scanning unit 23 Guide frame 25 Screw 25a Winding spring 30 Drive unit 31 Drive motor 33 Belt 40 Guide member 41 Ball 50 imaging unit 60 scanning drive unit 61 first sliding member 62 second sliding member 71a moving pulley 71b moving pulley 72 belt

Claims (9)

[Claims] 1. An image reading apparatus for illuminating and scanning a document, wherein at least one surface of a housing of the image reading device is detachable, and a drive unit for scanning and driving a scanning unit is provided inside the one surface. An image reading device characterized by the above-mentioned. 2. The image reading apparatus according to claim 1, wherein the attachment / detachment direction of the one surface is a horizontal direction. 3. The image reading apparatus according to claim 1, wherein a guide member for guiding the scanning of the scanning unit is provided inside the one surface. 4. The image reading apparatus according to claim 1, wherein an image forming section is provided inside said one surface. 5. An image reading apparatus for illuminating and scanning a document, wherein a guide member for guiding a scanning unit to scan and a driving unit for scanning and driving the scanning unit are integrated to constitute a scanning drive unit, The unit is detachable with respect to the scanning drive unit, wherein at least one surface of a housing of the image reading device is detachable, and the scanning drive unit is provided inside the one surface. apparatus. 6. An image reading apparatus according to claim 5, wherein said guide member is a linear ball rolling slide rail. 7. The scanning unit includes: a first scanning unit that illuminates and scans a document; and a second scanning unit that is different from the first scanning unit and maintains a constant optical path length. The image reading device according to claim 5, wherein the first scanning unit is connected to a drive transmission member, and the second scanning unit is driven by the first scanning unit. 8. The second scanning unit has a pair of moving pulleys and a drive transmitting member hung on the pair of moving pulleys, and a part of the drive transmitting member is fixed to be immovable, and the driving transmission is performed. The image reading device according to claim 7, wherein another part of the member is connected to the first scanning unit. 9. The image reading apparatus according to claim 7, wherein the second scanning unit is urged in a direction pressed against the guide member.