JPH06100777B2 - Optical support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention stably mounts an optical unit, such as a light source and a reflecting mirror, which moves reciprocally for scanning a document placed on a document table on a guide member. The present invention relates to a support device for an optical unit.

<Prior Art> Conventionally, in order to achieve downsizing and speedup of the entire copying machine, an optical part including a light source and a reflecting mirror is reciprocally moved below a contact glass which is a fixed document table. As a result, many documents in which a document set on the contact glass is scanned and exposed are provided.

In order to reciprocate the optical part in this way, slide members that are moving members are attached to the lower surfaces of both ends of the support frame to which the optical part is attached, and the slide members at each end are respectively used as guide members. In addition to the structure in which a driving force is transmitted to both sides of the support frame by supporting it on a slider and connecting drive wires to both ends, each slide member is mounted in a state of vertically penetrating the support frame. By adjusting the downward projecting length of the screw member, the levelness of the support frame, that is, the levelness of the optical member attached to the support frame can be adjusted. There is one which corrects the dimensional error and the assembly error so that the horizontality of the optical member can be accurately set (see Japanese Utility Model Laid-Open No. 58-138932).

<Problems to be Solved by the Invention> In the configuration described above, the slide members attached to both ends of each support frame body change the downward protruding length of the screw member that vertically penetrates the support frame body. By doing so, the vertical position of the support frame main body can be adjusted.

However, because there are multiple screw members and there are many adjustment points,
Because it takes time to adjust the support frame to keep it level, and screwing or loosening it from above,
Since it is necessary to remove the contact glass, there is a problem that workability is poor.

<Object of Invention> The present invention has been made in view of the above problems,
It is an object of the present invention to provide an optical unit support device that can easily adjust the levelness of a support frame to which an optical unit is attached without removing the document table.

<Means for Solving Problems> In order to achieve the above-mentioned object, an optical unit supporting device of the present invention is a supporting frame having an optical unit that reciprocates for scanning an original placed on an original table. A moving member is attached to both ends of the support member, and one of the moving members is attached so as to be vertically adjustable via an eccentric cam mechanism, and the eccentric cam mechanism includes a shaft protruding horizontally from one end of the support frame. , An adjusting member having a circular outer surface eccentric to the shaft and rotatably fitted to the outer periphery of the shaft, and rotatably fitted to the circular outer surface with the moving member attached. End member and the end portion of the shaft that is screwed into the tip of the shaft, and the adjustment member is sandwiched between the end frame and the support frame to restrict relative rotation of the adjustment member with respect to the support frame and removal from the shaft. Allows relative rotation of the And a lock member for restricting the removal of the end member from the circular outer surface in the closed state.

However, a pair of the moving members may be attached to both ends of the support frame.

<Operation> With the above configuration, the adjustment member can be allowed to rotate by rotating and loosening the lock member of the eccentric cam mechanism. By adjusting the rotation of the adjustment member, the adjustment member can be adjusted. It is possible to adjust the relative height between the support frame and the end member by eccentrically rotating the circular outer surface of the. Therefore, the end of the support frame on the side where the eccentric cam mechanism is provided can be adjusted to a desired height to adjust the level of the support frame, and thus the level of the optical section attached to the support frame.

Moreover, since the turning operation of the adjusting member can be performed from the lateral direction, it is not necessary to remove the document table for adjustment.

Further, after the adjustment work is completed, the lock member is tightened, and the adjustment member is sandwiched between the lock member and the support frame, so that the rotation of the adjustment member can be prevented.

Further, the locking member causes the adjusting member to move from the shaft,
Since it is possible to restrict the end members from coming out of the circular outer surface, the adjusting member is fitted to the shaft, and the lock member is fitted to the shaft while the end member is fitted to the circular outer surface of the adjusting member. The eccentric cam mechanism can be constructed simply by screwing. In addition, since the lock member that restricts the relative rotation of the adjusting member with respect to the support frame is screwed into the tip of the shaft,
The adjustment member can be downsized as compared with the case where the adjustment member is fixed to the fixed side member by a screw or the like radially outward of the shaft. As a result, the entire optical unit supporting device can be downsized. You can

In particular, in the case where the moving members are attached to the opposite ends of the supporting frame one by one, the pair of moving members rotate together with the end members around the shaft projecting from the supporting frame. The four moving members abut on the guide member without any gap,
It is possible to always ensure that the guide member is reliably supported.

<Examples> Hereinafter, detailed description will be given with reference to the accompanying drawings illustrating examples.

FIG. 8 is a schematic view showing the internal structure of a copying machine equipped with the optical part supporting device of the present invention.

Reference numeral 1 is the main body of the copying machine.
12 and a lower chamber 13, an optical system 2 for scanning and exposing a document is provided in the upper chamber 12, a copy processing unit 4 for forming a copied image on a copy paper in the lower chamber 13, and a copy paper transport unit. 8 are provided.

Here, as the optical system 2, the light source 21 including the light emitting body 31, the main reflection plate 32, and the sub reflection plate 33, the plane reflection mirrors 22, 23, and
24, a lens 25, and a plane reflecting mirror 26, the light source 21 and the plane reflecting mirrors 22, 23, 24 are moved in a direction indicated by an arrow A to scan the document D on the contact glass 14 which is a document table. It is a structure that enables exposure. And the light source
21 and the plane reflecting mirror 22 move integrally, and the plane reflecting mirror
23 and 24 also move integrally, and the former moving speed is set to be twice the latter moving speed. In the following description, the light source 21 and the plane reflecting mirrors 22, 23 and 24 will be described. Collectively referred to as an optical unit 2 '.

Further, the copy paper transport unit 8 includes a paper feed roller 81 and a paper feed path.
82, registration roller 83, conveyance roller 84, heat fixing roller
85 and a discharge roller 86, and by driving the paper feed roller 81, the copy paper P is fed one by one from the paper feed cassette 16 and guided to the copy processing section 4 to transfer the toner image, and the heat fixing roller 85 The toner image is heated and fixed by the above, and then discharged onto the receiving table 17, but the present invention is not limited to this structure, and for example, the paper feeding side and the discharging side are on the same side. It is also possible to use a copy paper transporting unit having another structure known in the art.

Further, as the copy processing unit 4, a charging charger 42, a developing device 43, a transfer charger 44, a separation belt 45, and a cleaner are provided around a photosensitive drum 41 that rotates in the direction indicated by C in the figure.
46 are arranged in this order, and an original image is formed on the outer surface of the photosensitive drum 41 uniformly charged by the charging charger 42 to form an electrostatic latent image, and the electrostatic latent image is not formed. After removing the electrostatic charge on the peripheral portion by a blank lamp (not shown), the developing device 43 visualizes the toner image, the transfer charger 44 transfers the toner image onto the copy paper P, and the cleaner 46 collects the residual toner. However, the present invention is not limited to this configuration, and it is also possible to use a copy processing unit having another conventionally known configuration such as one using a belt-shaped photoconductor.

FIG. 1 shows an optical section 2'having an optical section supporting device of the present invention.
2 is a plan view showing the structure of FIG.
And a first supporting frame main body 51 that supports the reflecting mirror 22, a second supporting frame main body 61 that supports the reflecting mirrors 23 and 24, and move to both ends of both supporting frame main bodies 51 and 61. It has a pair of drive wires 57, 58 for applying force. And the first
A slide member 52, which is a pair of moving members, and one drive wire connecting portion 53 are attached to a predetermined position on one end of the support frame main body 51, and a drive wire connecting portion (not shown) is attached to a predetermined position on the other end. It is installed. Also, the first support frame main body
A slide member 55, which is a pair of moving members, is attached to a predetermined position of an end member 54 that is rotatably connected to the 51.

More specifically, the slide members 52, 55 are small pieces formed of a fluororesin such as polytetrafluoroethylene or other material having a small friction coefficient, and the one end and the end member of the support frame main body 51. 54 is projected downward from each bottom surface. In the end member 54, an upward bent portion 54a is formed in an intermediate portion of both slide members 55, and a circular through hole 54b is formed in the central portion of the upward bent portion 54a, but the circular through hole is formed. A pair of rotation restricting protrusions 54c are formed close to 54b.

A shaft 51b having a diameter smaller than that of the circular through hole 54b is horizontally projected at a predetermined position of the end of the first support frame main body 51, and the shaft 51b is brought close to the shaft 51b to rotate the shaft. A stopper portion 51c with which the restriction protrusion 54c can be engaged is formed. Then, as shown in FIG. 5, the circular outer surface 5 of the adjusting member 56 having the circular outer surface 56a fitted in the circular through hole 54b.
The shaft 51b is inserted into a shaft hole 56b formed in an eccentric state with respect to 6a, and in the inserted state, the lock member 51d having a large diameter flange portion is screwed into the end of the shaft 51b. Is rotatably held in a state in which it is prevented from coming off from the shaft 51b. Incidentally, 56d is a knob for rotating the adjusting member 56.

As shown in FIG. 3, the depth of the circular outer surface 56a is larger than the thickness of the upward bending portion 54a of the end member 54, and the protruding length of the shaft 51b is smaller than the depth of the shaft hole 56b. I am trying to become. Therefore, the lock member 51d
By screwing in, the adjusting member 56 can be sandwiched between the stopper portion 51c and fixedly fixed to the shaft 51b, and the end member 54 can be freely rotated about the shaft 51b. , By this, the slide member 5
2, 55 always come into contact with the upper surfaces of the sliders 77, 78, which are guide members attached to the copying machine main body 1, at four points without any gaps.

The interval between the slide members 52 fixedly attached to the first support frame main body 51 is made large in order to improve stability during movement, and the slide members 52 are attached so as to be rotatable. The interval between the slide members 55 is made considerably smaller than the interval between the slide members 52.

A slide member 62, which is a moving member, and one pulley 63 are attached to a predetermined position on one end of the second support frame main body 61, and one pulley 63 'is attached to a predetermined position on the other end.
Is installed. Then, a pair of slide members 65, which are moving members, are attached to predetermined positions of the end member 64 rotatably connected to the second support frame main body 61.

More specifically, the second support frame main body 61 is
Reflector mounting part with both ends of a flat plate bent at right angles 67
And a slide support portion in which a lower end portion of one flat plate material is bent at a right angle to form a pulley attachment portion, and an L-shaped bent slide member attachment portion 68a is attached to an upper end portion. 68 and the lower end of one flat plate are bent at a right angle to form a pulley mounting portion, the upper end is bent at a right angle, and further bent at a right angle to form an end member connecting portion. The slide support portion 69 is formed, and the reflecting mirror attachment portion 67 is provided.
And the slide support portions 68, 69 are fixedly connected by shafts 70, 71 and, if necessary, by welding (see area A in the drawing). Further, in the end member 64, an upward bending portion 64a is formed at an intermediate portion of both slide members 65, and a circular through hole 64b is formed in a central portion of the upward bending portion 64a.
Is formed, and moreover, the rotation restricting protrusion 64c is formed in the vicinity of the circular through hole 64b. Further, the circular through hole 64b is provided at a predetermined position on the end of the second support frame main body 61.
A shaft 61b having a diameter smaller than that of the shaft 61b is provided so as to project in the horizontal direction, and a stopper portion 61c is formed near the shaft 61b so that the rotation restricting protrusion 64c can be engaged with the stopper portion 61c. Further, the step portion 61e provided below the stopper portion 61c also acts as a rotation restricting portion. Then, of the adjusting member 66 having the circular outer surface 66a fitted into the circular through hole 64b, the shaft 61b is inserted into the shaft hole 66b formed in an eccentric state with respect to the circular outer surface 66a, and the shaft 61b is inserted in the inserted state. The end member 64 is rotatably held by screwing the lock member 61d into the end portion. Incidentally, 66d is a knob for rotating the adjusting member 66. Regarding the attachment of the end member 64 and the adjusting member 66, the end member 54 and the adjusting member 56 shown in FIG.
Therefore, detailed description will be omitted.

With the above structure, the slide members 62 and 65 are brought into contact with the upper surfaces of the sliders 77 and 78 attached to the copying machine main body 1, respectively, and the pulleys 63 and 63 'are located below the sliders 77 and 78. Further, the interval between the slide members 62 fixedly attached to the second support frame main body (61) is made large in order to improve stability during movement, and the slide members 62 are attached so as to be rotatable. The distance between the slide members 65 thus formed is considerably smaller than the distance between the slide members 62.

Further, at a predetermined position where the first supporting frame main body 51 and the second supporting frame main body 61 face each other, an engaging portion for positioning the two supporting frame main bodies when the drive wire is suspended.
59, 79 are formed.

With the optical unit support device having the above-described configuration, the horizontal degree of the first support frame main body 51 can be adjusted by grasping the knob 56d with the lock member 51d loose, as shown in FIG. This can be easily performed only by rotating 56 (rotating from the state shown by the two-dot chain line in FIG. 4 to the state shown by the solid line). In this way, the vertical position of the slide member 55 with respect to the support frame main body 51 can be adjusted. However, the horizontality of the light source 21 and the reflecting mirrors 22, 23, 24 can be adjusted.

Further, the levelness of the second support frame main body 61 can be adjusted in the same manner.

After the adjustment of the levelness is completed, the lock member
It suffices to fix the adjusting member 56 by screwing in the 51d, whereby the levelness of the support frame main body 51 can be reliably maintained for a long period of time.

As is clear from the above description, the levelness can be easily adjusted from the front or the back of the copying machine (the direction perpendicular to the paper surface of FIG. 8), so that it is absolutely necessary to remove the contact glass 14. Will be significantly improved.

Further, the lock member 51d causes the adjustment member 56 to move to the shaft 51b.
It is possible to restrict the removal of the end member 54 from the circular outer surface 56a as well as the removal of the adjustment member 56 with respect to the shaft 51b. The eccentric cam mechanism can be configured simply by simply fitting the lock members 51d onto the shafts 51b after fitting them to the circular outer surfaces 56a. Moreover, since the end member 54 is rotatably attached to the first support frame main body 51, the end member 54 can freely rotate around the shaft 51b even when the lock member 51d is tightened. By rotating the end member 54 in this manner, it is possible to ensure a state in which each pair of slide members 52, 55, that is, a total of four slide members 52, 55, reliably contact the upper surfaces of the sliders 77, 78. (See FIG. 6) Further, since the end member 64 is rotatably attached to the second support frame main body 61, each pair of slide members 62 is arranged in the same manner as the slide members 52 and 55. ,
It is also possible to secure a state in which 65 is in contact with the upper surfaces of the sliders 77, 78 without a gap (see FIG. 7).

The mounting state of the other slide member 52, 62 to the support frame main body 51, 61 is accurately set in advance by, for example, a combination of a slot and a screw (not shown).

As described above, after adjusting the levelness of the support frame main body portions 51 and 61 and the abutting condition with respect to the sliders 77 and 78, the connection state of the drive wires 57 and 58 with respect to the drive wire connecting portion 53 is adjusted to obtain the light source. 21 and the reflecting mirror 22 can be adjusted so as to maintain a right angle with respect to the moving direction of the optical section, and by adjusting the winding state of the drive wires 57, 58 around the pulleys 63, 63 ', the reflecting mirror 23, Since 24 can be adjusted so as to maintain a right angle with respect to the moving direction of the optical part, even when it is moved forward for image formation by the both drive wires 57 and 58, the occurrence of blurring is surely prevented. As a result, a high quality copied image can be obtained. However, in order to adjust the image distortion, the position where the drive wire is fixed by a screw or the like is changed in a state where the drive wire is wound around the drive pulley (not shown) and the pulley of the second support frame main body 61 is changed. 63 'may be moved so that the reflecting mirrors 23, 24 are adjusted so as to maintain a right angle with respect to the moving direction of the optical section. Also, when the focus is adjusted, the connection of the drive wire connecting portion 53 to the drive wire 58 can be adjusted.

Further, in the state where the optical section 2'is returned to the home position side, as shown in FIG. 2, the slide member 52 having a large gap and the slide member 65 having a small gap are close to each other, and the slide member 62 having a large gap is arranged. Since the slide member 55 having a small distance is close to the slide member 55, the first support frame main body 51 and the second support frame main body 61 can be brought close to each other (specifically, the drive wire winding is performed). Both engaging parts when hanging
By engaging 59 and 79 in advance, it is possible to bring the two engaging parts into close proximity to each other), and as a result, the copying machine main body 1 can be downsized. In addition, the lock members 51d, 61d for restricting the relative rotation of the adjusting members 56, 66 with respect to the support frames 51, 61 are screwed into the tip portions of the shafts 51b, 61b, so that the adjusting members can be moved radially outward of the shafts. As compared with the case where the adjustment members 56 and 66 are made smaller than the case where the adjustment members 56 and 66 are fixed to the fixed side member with screws or the like, the entire optical unit supporting device can be made small. Can contribute to downsizing.

Further, the support frame main body portions 51, 61 of the present embodiment are the end members 5
Since 4,64 are attached to the respective support frame bodies in a state in which the rotation range is restricted, it is possible to surely prevent the inconvenience that the end members are turned upside down when the optical portion 2'is assembled. be able to.

<Effects of the Invention> As described above, according to the present invention, since one of the moving members attached to both ends of the support frame body to which the optical portion is attached is supported by the eccentric cam mechanism so that the vertical position can be adjusted, Leveling can be easily adjusted simply by operating the eccentric cam mechanism.

Moreover, since the above adjustment can be performed in the lateral direction without removing the document table, workability can be improved.

Further, after the adjustment work is completed, by tightening the lock member around the shaft, it is possible to prevent the adjustment member from rotating, so that the levelness of the support frame can be reliably maintained for a long period of time.

Further, the locking member causes the adjusting member to move from the shaft,
Since it is possible to restrict the end member from coming out of the circular outer surface, the locking member is fitted to the shaft, and the end member is fitted to the circular outer surface of the adjusting member. The eccentric cam member can be simply constructed by simply screwing it into. In addition, the lock member that restricts the relative rotation of the adjustment member with respect to the support frame is screwed into the tip of the shaft, so compare the case where the adjustment member is fixed to the fixed-side member with screws or the like radially outward of the shaft. As a result, the adjustment member can be downsized, and as a result, the entire optical unit support device can be downsized.

[Brief description of drawings]

 FIG. 1 is a perspective view of an optical part, FIG. 2 is a plan view, FIG. 3 is a longitudinal sectional view showing an eccentric cam mechanism, FIG. 4 is a view for explaining the operation of the eccentric cam mechanism, and FIG. 6 is a side view of the first support frame main body, FIG. 7 is a side view of the second support frame main body, and FIG. 8 is an internal mechanism of the copying machine. Schematic. 14 ... Contact glass, 21 ... Light source forming part of optical section, 22,23, 24 ... Reflecting mirror forming part of optical section, 51 ... First support frame main body section, 51b ... … Shaft 52,55 …… Slide member, 54 …… End member, 56 …… Adjustment member 56a …… Circular outer surface 51d …… Lock member 57,58 …… Drive wire 61 …… Second support frame body part, 61b …… Axis 62,65 …… Slide member, 64 …… End member, 66 …… Adjustment member 66a …… Circular outer surface 77,78 …… Slider

Claims (2)

[Claims] 1. A moving member is attached to both ends of a support frame having an optical unit reciprocating for scanning a document placed on a document table, and one moving member is provided through an eccentric cam mechanism. The eccentric cam mechanism has a shaft that horizontally projects from one end of the support frame and a circular outer surface that is eccentric to the shaft, and is rotatably mounted on the outer periphery of the shaft. The adjustment member is fitted between the fitting member, the end member rotatably fitted to the circular outer surface with the moving member attached, and the end of the shaft screwed into the support frame. The member is sandwiched to regulate the relative rotation of the adjustment member with respect to the support frame and the removal from the shaft, and the removal of the end member from the circular outer surface with the relative rotation allowed to the adjustment member. And a locking member that regulates Optic support device according to claim Rukoto. 2. The optical part supporting device according to claim 1, wherein the moving members are attached to the supporting frame at opposite ends thereof, respectively.