JP2010081755A - Motor mounting structure and image forming device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor mounting structure that responds to space saving of a mounting part and prevents the occurrence of backlash in the thrust direction and the occurrence of the falling-down of a rotary shaft of a motor so as to surely fix the motor, and an image forming device using the same. <P>SOLUTION: The motor mounting structure includes: a motor; a member to be mounted to which the motor is freely attachably/detachably mounted; an insertion recessed part which is provided in the member to be mounted and to which a part of the motor or a mounting auxiliary member attached to the motor is inserted in a positioned state; and a fixing means that fixes the motor by fitting a first fixing part, provided on the side of the member to be mounted, to a second fixing part provided in the motor or on the side of the mounting auxiliary member, relative to each other by rotating the motor or the mounting auxiliary member around a drive shaft of the motor while inserting a part of the motor or the mounting auxiliary member attached to the motor into the insertion recessed part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor mounting structure and an image forming apparatus using the same.

JP-A-10-336940 Japanese Patent Laid-Open No. 11-127551 JP 2001-096500 A

  Conventionally, as a technique related to this type of motor mounting structure, for example, those disclosed in Japanese Patent Application Laid-Open No. 10-336940, Japanese Patent Application Laid-Open No. 11-127551, Japanese Patent Application Laid-Open No. 2001-096500, and the like have already been proposed. .

  The motor mounting structure according to the above-mentioned JP-A-10-336940 is a motor mounting structure for mounting a motor case to a bracket that supports the motor. A pair of binding sites overlapping each other is formed, and the pair of binding sites are integrally coupled by an elastic coupling body having an elastic restoring force.

  In addition, the motor mounting structure according to the above-mentioned Japanese Patent Application Laid-Open No. 11-127551 is a motor mounting structure for mounting a motor case to a bracket that supports the motor. An elastic piece that is elastically deformable along a direction, and an engagement portion that is provided on the bracket and that can be engaged with the elastic piece by elastically deforming the elastic piece inward in the radial direction of the case. It is comprised so that it may become.

  Further, the fixing structure of the miniature motor according to the above-mentioned Japanese Patent Application Laid-Open No. 2001-096500 is a fixing structure for attaching the miniature motor to a housing of an apparatus, and the like. A male screw part region that forms a screw part, and at least one end side of the housing case of the motor has a cylindrical shape, and is screwed into the female screw part at least on the drive shaft side end part of the outer peripheral surface of the cylindrical part. And the male screw part is screwed into the female screw part, whereby the motor is mechanically held and fixed to the housing or the drive part frame.

  By the way, the problem to be solved by the present invention can cope with the space saving of the mounting portion, and the motor can be prevented from generating backlash in the thrust direction or falling down of the rotating shaft of the motor. It is an object of the present invention to provide a motor mounting structure that can be securely fixed and an image forming apparatus using the same.

That is, the invention described in claim 1 includes a motor,
A member to which the motor is detachably attached;
An insertion recess provided in the attached member and inserted in a state in which a part of the motor or an attachment auxiliary member mounted on the motor is positioned;
By rotating the motor or the mounting auxiliary member around the drive shaft of the motor in a state where a part of the motor or the mounting auxiliary member attached to the motor is inserted into the insertion recess, the motor A first fixing portion provided on the attached member side and a second fixing portion provided on the motor or the auxiliary mounting member side are relatively fitted and fixed; The motor mounting structure is characteristic.

  According to a second aspect of the present invention, the insertion recess is an insertion hole into which a cylindrical portion provided so as to protrude from a base end portion of the drive shaft of the motor is inserted. The motor mounting structure according to claim 1.

  Furthermore, the invention described in claim 3 is the motor according to claim 1, wherein the insertion recess is an insertion hole into which an outer shell member formed in a cylindrical shape of the motor is inserted. It is a mounting structure.

  The invention described in claim 4 is characterized in that the insertion recess is an insertion recess into which an outer shell member formed in a cylindrical shape of the motor is inserted. The motor mounting structure described.

  Further, in the invention described in claim 5, the second fixed portion provided on the motor side is connected to the end of the outer shell member formed in a cylindrical shape of the motor on the driving shaft protruding side. The motor mounting structure according to any one of claims 1 to 4, wherein the motor mounting structure comprises a convex portion provided in a substantially hemispherical shape on an outer peripheral surface of a protruding portion provided so as to protrude in the same direction as the shaft. .

  According to a sixth aspect of the present invention, the second fixing portion provided on the motor side is a convex provided in a substantially hemispherical shape on the outer peripheral surface of the outer shell member formed in the cylindrical shape of the motor. The motor mounting structure according to any one of claims 1 to 4, wherein the motor mounting structure comprises a portion.

  Furthermore, in the invention described in claim 7, the second fixing portion provided on the motor side is provided in a substantially hemispherical shape on the outer peripheral surface of the annular mounting auxiliary member press-fitted into the outer periphery of the motor. The motor mounting structure according to any one of claims 1 to 4, wherein the motor mounting structure comprises a convex portion.

  In the invention described in claim 8, the first fixing portion provided on the attached member side has a substantially hemispherical concave portion into which the second fixing portion on the motor side is fitted. The motor mounting structure according to claim 5, wherein the motor mounting structure is characterized in that

  Furthermore, in the invention described in claim 9, the first fixing portion provided on the attached member side is inserted from the insertion portion into which the second fixing portion on the motor side is inserted and the insertion portion. A guide passage portion for guiding the motor-side second fixing portion in a circumferential direction centering on a drive shaft of the motor, and a substantially hemispherical recess portion into which the motor-side second fixing portion is fitted. The motor mounting structure according to claim 8, comprising:

  According to a tenth aspect of the present invention, the first fixing portion provided on the attached member side is provided so as to be elastically deformable in an outer peripheral direction centering on a drive shaft of the motor. The motor mounting structure according to claim 9, wherein the motor mounting structure is characterized in that:

Furthermore, the invention described in claim 11 is a motor for driving at least a part of the image forming member;
A frame member to which the motor is detachably attached;
A recess for insertion that is provided in the frame member and is inserted in a state where a part of the motor or an attachment auxiliary member mounted on the motor is positioned;
By rotating the motor or the mounting auxiliary member around the driving shaft of the motor in a state where a part of the motor or the mounting auxiliary member attached to the motor is inserted into the insertion recess, the motor The first fixing portion provided on the frame member side and the second fixing portion provided on the motor or the auxiliary mounting member side are relatively fitted and fixed. An image forming apparatus.

  According to the first aspect of the present invention, it is possible to cope with space saving of the mounting portion, and there is no play in the thrust direction or the rotation shaft of the motor does not fall down. It can be securely fixed.

  In addition, according to the invention described in claim 2, it is easy to process the attached member.

  Furthermore, according to the invention described in claim 3, the outer shell member of the motor can be fixed securely.

  According to the fourth aspect of the invention, the outer shell member of the motor can be more reliably fixed.

  Furthermore, according to the invention described in claim 5, the fixing portion can be easily provided.

  Moreover, according to the invention described in claim 6, the fixing portion can be easily provided.

  Furthermore, according to the seventh aspect of the present invention, the fixing portion can be easily provided without specially processing the motor.

  According to the eighth aspect of the invention, the second fixing portion on the motor side can be fixed securely.

  Furthermore, according to the invention described in claim 9, the motor mounting operation can be simplified.

  According to the invention described in claim 10, the force required to attach and detach the motor can be reduced.

  Furthermore, according to the invention described in claim 11, it is possible to cope with the space saving of the mounting portion, and there is no occurrence of backlash in the thrust direction, or the rotation shaft of the motor does not fall, An image forming apparatus capable of securely fixing a motor can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
FIG. 13 is a block diagram showing an image forming apparatus to which the motor mounting structure according to Embodiment 1 of the present invention is applied.

  As shown in FIG. 13, the image forming apparatus includes an image forming apparatus main body 100 formed in a box shape. Inside the image forming apparatus main body 100, a photosensitive drum, a charger, and an image exposure device are provided. Image forming members such as a device, a developing device, a transfer device, a fixing device, and a paper feeding device are disposed. In FIG. 13, reference numeral 1 denotes a drive motor. By this drive motor 1, for example, a sheet feeding device, another photosensitive drum, an image exposure device, and a developing device disposed inside the image forming apparatus main body 100. Image forming members such as a transfer device and a fixing device are driven.

  The drive motor 1 is attached from the outside of the frame constituting the image forming apparatus main body 100, and is difficult to be screwed from the inside of the image forming apparatus main body 100.

1 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 1 of the present invention.
As shown in FIG. 2, the drive motor 1 includes a case 2 that is a cylindrical outer shell member made of metal such as iron, stainless steel, or aluminum, and the drive motor 1 is provided on one end surface of the case 2. The drive shaft (rotary shaft) 3 is provided so as to protrude, and the outer diameter of the drive shaft 3 that rotatably holds the drive shaft 3 is smaller than the outer diameter of the case 2 on the outer periphery of the base end portion of the drive shaft 3. A cylindrical inlay portion 4 is provided so as to protrude. The other end surface 2a of the case 2 is closed.

  Further, as shown in FIG. 2, the case 2 of the drive motor 1 is positioned at an angle of 120 degrees along the outer circumferential direction at the end portion on which the drive shaft 3 protrudes. In addition, a total of three mounting projections 5, 5, 5 constituting the second fixing portion are provided. These mounting protrusions 5, 5, 5 make a part of the case 2 protrude in a rectangular shape, and on the back side of the case 2, one of the lids 6 made of synthetic resin or the like of the drive motor 1. The part is configured to project integrally in the same shape as the projecting part 5 of the case 2.

  Further, as shown in FIG. 2, each of the mounting projections 5, 5, 5 is provided with a substantially hemispherical convex portion 7 on the outer peripheral surface thereof in the radially outward direction from the outer peripheral surface of the case 2. It has been. The convex portion 7 may project the protruding portions 5, 5, 5 of the case 2 into a substantially hemispherical shape by press molding or the like, or a substantially hemispherical convex member to the protruding portions 5, 5, 5 of the case 2. It may be formed by being fixed. In this embodiment, the projecting portions 5, 5, and 5 of the case 2 are formed so as to project into a substantially hemispherical shape by press molding or the like.

  On the other hand, as shown in FIG. 1, a frame 10 as a member to be attached to the image forming apparatus to which the drive motor 1 is attached is space-saving along with the downsizing of the image forming apparatus. The drive motor 1 and a rectangular or rectangular shape having a necessary minimum area including a drive circuit and a control circuit attached to the frame 10 as necessary, and have a predetermined thickness. It is formed of a synthetic resin or the like in a flat plate shape. The thickness of the frame 10 is set to be substantially equal to the length of the mounting projection 5 of the drive motor 1, for example, but it is needless to say that the frame 10 may be thicker or thinner in some cases.

  Further, as shown in FIG. 3, the frame 10 has a circular insertion hole that is fixed in alignment with the state in which the spigot 4 of the drive motor 1 is inserted at the center of the mounting position of the drive motor 1. 11 is formed, and the first fixing portion 12 is fixed to the outer periphery of the insertion hole 11 by rotating in a state where the three mounting protrusions 5, 5, 5 of the drive motor 1 are inserted. , 12 and 12 are provided at three positions so as to form 120 ° with respect to each other along the circumferential direction around the drive shaft 3 of the drive motor 1.

  As shown in FIGS. 3, 4, and 5, the second fixing portions 12, 12, and 12 provided on the frame 10 are fitted with the mounting protrusions 5, 5, and 5 of the drive motor 1. An arc-shaped groove 13 for turning is provided, and the width of the groove 13 is that of the mounting protrusions 5, 5, 5 (including the thickness of a part of the lid 6) of the drive motor 1. It is set larger than the thickness.

  The arc-shaped groove 13 has an insertion portion 14 in which a substantially hemispherical convex portion 7 constituting a second fixing portion of the drive motor 1 is inserted in the vicinity of one end portion along the circumferential direction thereof. It is formed as a semicircular concave portion having a radius larger than the radius of the convex portion 7. Further, as shown in FIG. 5, the arc-shaped groove portion 13 has a substantially hemispherical convex portion 7 of the drive motor 1 inserted from the insertion portion 14 on the back surface side of the insertion portion 14. A groove-shaped guide passage portion 15 for guiding the drive shaft 3 in the circumferential direction is provided. The guide passage portion 15 has a depth d2 in the outer peripheral direction centered on the drive shaft 3 of the drive motor 1 and gradually becomes shallower toward the tip than the depth d1 on the entrance side. Is set to Further, a ¼ spherical concave portion 16 in which the substantially hemispherical convex portion 7 of the drive motor 1 is fitted is provided at the distal end portion of the guide passage portion 15.

  Furthermore, an arc-shaped groove portion 17 formed concentrically with the arc-shaped groove portion 13 is provided on the outer periphery of the arc-shaped groove portion 13. The outer circumferential arc-shaped groove portion 17 is formed by inserting the mounting protrusions 5, 5, 5 and the substantially hemispherical convex portion 7 of the drive motor 1 into the inner arc-shaped groove portion 13. When the substantially hemispherical convex portion 7 is fitted into the guide passage portion 15 of the groove portion 13, the member 18 of the frame 10 positioned between the arc-shaped groove portion 13 and the arc-shaped groove portion 17 is elastic. Is provided to allow deformation in the outer circumferential direction.

  The frame 10 may be formed to have the same thickness as a whole, but in order to reduce the amount of resin while maintaining the rigidity of the frame 10, the arc-shaped groove 13 and the circle 10 Only the inner periphery and the outer periphery of the arc-shaped groove portion 17 may be formed thick, and others may be formed relatively thin except for the outer periphery of the frame 10.

  In the above configuration, the motor mounting structure according to the present embodiment can cope with the space saving of the mounting portion as follows, and the backlash occurs in the thrust direction, or the rotation shaft of the motor The motor can be securely fixed without falling down.

  That is, in the motor mounting structure according to this embodiment, as shown in FIG. 1, the drive motor 1 is held substantially perpendicular to the frame 10 as the mounted member, and the inlay portion 4 of the drive motor 1 is framed. The inlay portion 4 of the drive motor 1 is inserted into the insertion hole 11 of the frame 10 in alignment with the insertion hole 11 of the drive motor 1, and the end surface of the case 2 of the drive motor 1 is abutted against the surface of the frame 10.

  At this time, as shown in FIG. 6, the drive motor 1 has mounting protrusions 5, 5, 5 of the drive motor 1 provided on the outer periphery of the case 2 in the arcuate groove 13 of the frame 10. In addition, by aligning the substantially hemispherical projections 7 of the mounting projections 5, 5, and 5 with the position of the insertion portion 14 of the frame 10, the inlay portion 4 of the drive motor 1 is framed. 10 insertion holes 11.

  In FIG. 3, the drive motor 1 is the drive shaft of the drive motor 1 in a state where the operator grips the case 2 of the drive motor 1 by hand or the case 2 of the drive motor 1 by a machine. 3, the substantially hemispherical convex portion 7 provided on the mounting protrusions 5, 5, 5 of the drive motor 1 is rotated in the clockwise direction about the arcuate groove portion 13 of the frame 10. As shown in FIG. 3, the substantially hemispherical convex portion 7 moves into a ¼ spherical concave portion 16 provided at the distal end portion of the guiding passage portion 15. It fits and is fixed.

  At this time, the depth d along the outer circumferential direction of the guide passage portion 15 is set so as to gradually become shallower (smaller) as it goes to the tip portion, so that the substantially hemispherical convex portion 7 is formed on the frame 10. It moves to the recessed part 16 provided in the front-end | tip part of the guide path part 15, pressing the outer peripheral surface of this guide path part 15. However, since the member 18 of the frame 10 provided with the guide passage portion 15 is provided with an arc-shaped groove portion 17 on the outer periphery thereof and is elastically deformable in the outer peripheral direction, the substantially hemispherical convex portion. 7 is movable toward the tip of the guide passage 15 without excessively pressing the outer peripheral surface of the guide passage 15.

  Moreover, the 1/4 spherical concave portion 16 is pressed against the substantially hemispherical convex portion 7 of the drive motor 1 by the elastic deformation force of the member 18 of the frame 10. Even if the counterclockwise torque in FIG. 3 is applied to the drive motor 1 by the attached gear or the like (not shown), there is no possibility that the drive motor 1 moves.

  Therefore, the direction in which the guide passage portion 15 and the recess 16 are provided is such that the substantially hemispherical projection 7 of the drive motor 1 fits into the recess 16 of the frame 10 even when torque is applied to the drive motor 1. It is desirable to set it in the full direction.

  As described above, in the motor mounting structure according to the above-described embodiment, it is possible to cope with the space saving of the mounting portion, the backlash occurs in the thrust direction, and the drive shaft 3 of the drive motor 1 falls down. In this way, the drive motor 1 can be securely fixed.

Embodiment 2
FIG. 7 shows a second embodiment of the present invention. The same reference numerals are given to the same parts as those of the first embodiment. In the second embodiment, as shown in FIG. Between the end face of the case 2 of the drive motor 1 and the frame 10, a disc-shaped rubber sheet 20 as a buffer material is interposed.

  Therefore, in the second embodiment, the vibration vibration of the drive motor 1 can be absorbed by the rubber sheet 20, and the vibration is prevented from being transmitted to the members provided on the frame 10 and other members via the frame 10. can do.

  In the second embodiment, the length of the mounting protrusions 5, 5, 5 of the drive motor 1 is set longer than that in the first embodiment in consideration of the thickness of the rubber sheet 20.

  Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

Embodiment 3
FIG. 8 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those in the first embodiment. In the third embodiment, as shown in FIG. Instead of inserting only the inlay portion 4 of the drive motor 1 into the frame 10, the insertion recess 30 of the frame 10 is formed in a cylindrical shape, and the case 2 of the drive motor 1 is formed in the insertion recess 30. While being configured to be inserted, the spigot 4 of the drive motor 1 is configured to be inserted into the end face of the insertion recess 30.

  The insertion recess 30 may be formed in a cylindrical shape, but corresponds to the arc-shaped groove 13 and the arc-shaped groove 17 of the frame 10 because the frame 10 is integrally formed of synthetic resin. Three cutout portions 31 are provided along the circumferential direction in the portion that has been cut out by a predetermined angle along the outer circumferential direction of the drive motor 1.

  In the case of the third embodiment, since the case 2 of the drive motor 1 can be inserted into the insertion recess 30 of the frame 10 and can be positioned and held, it is suitable for a large drive motor 1 or a drive motor 1 with a large load. ing.

  Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

Embodiment 4
11 and 12 show a fourth embodiment of the present invention. The same reference numerals are given to the same parts as those in the first embodiment. In the fourth embodiment, FIG. As shown in FIG. 12, the second fixing portion is not directly provided on the drive motor 1, but a synthetic resin motor fixing ring 40 is attached to the outer periphery of the drive motor 1 as a mounting auxiliary member. The motor fixing ring 40 is provided with a second fixing portion.

  In the fourth embodiment, there is no need to provide the mounting protrusions 5, 5, 5 and the substantially hemispherical convex portion 7 on the drive motor 1, and the drive motor 1 can be applied as it is to the existing drive motor 1. It is very versatile.

  Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

1 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 1 of the present invention. FIG. 2 is a perspective configuration diagram showing the drive motor. FIG. 3 is a rear view showing a frame as a member to be attached. FIG. 4 is an enlarged perspective view showing a main part of the front surface of the frame as the attached member. FIG. 5 is an enlarged perspective view showing the main part of the back surface of the frame as the attached member. FIG. 6 is a rear view showing a mounting state of the drive motor to the frame as the mounted member. FIG. 7 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 2 of the present invention. FIG. 8 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 3 of the present invention. FIG. 9 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 3 of the present invention. FIG. 10 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 3 of the present invention. FIG. 11 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 4 of the present invention. FIG. 12 is a perspective configuration diagram showing a motor mounting structure according to Embodiment 4 of the present invention. FIG. 13 is an external perspective view showing the main body of the image forming apparatus to which the motor mounting structure according to the embodiment of the present invention is applied.

Explanation of symbols

  1: drive motor, 2: case (outer shell member), 3: drive shaft (rotary shaft), 5: protrusion for mounting (second fixed portion), 7: convex portion (second fixed portion), 10: frame, 12: first fixing part.

Claims (11)

A motor,
A member to which the motor is detachably attached;
An insertion recess provided in the attached member and inserted in a state in which a part of the motor or an attachment auxiliary member mounted on the motor is positioned;
By rotating the motor or the mounting auxiliary member around the drive shaft of the motor in a state where a part of the motor or the mounting auxiliary member attached to the motor is inserted into the insertion recess, the motor A first fixing portion provided on the attached member side and a second fixing portion provided on the motor or the auxiliary mounting member side are relatively fitted and fixed; Characteristic motor mounting structure. The motor mounting structure according to claim 1, wherein the insertion recess is an insertion hole into which a cylindrical portion provided so as to protrude from a base end portion of a drive shaft of the motor is inserted. 2. The motor mounting structure according to claim 1, wherein the insertion recess is an insertion hole into which an outer shell member formed in a cylindrical shape of the motor is inserted. The motor mounting structure according to claim 1, wherein the insertion recess is an insertion recess into which an outer shell member formed in a cylindrical shape of the motor is inserted. The second fixing portion provided on the motor side is provided at the end of the outer shell member formed in the cylindrical shape of the motor on the driving shaft protruding side so as to protrude in the same direction as the driving shaft. The motor mounting structure according to any one of claims 1 to 4, wherein the motor mounting structure comprises a convex portion provided in a substantially hemispherical shape on an outer peripheral surface of the protruding portion. The second fixing portion provided on the motor side includes a convex portion provided in a substantially hemispherical shape on an outer peripheral surface of an outer shell member formed in a cylindrical shape of the motor. 4. The motor mounting structure according to any one of 4 above. 2. The second fixing portion provided on the motor side includes a convex portion provided in a substantially hemispherical shape on an outer peripheral surface of an annular mounting auxiliary member press-fitted into the outer periphery of the motor. The motor attachment structure in any one of thru | or 4. The first fixing portion provided on the attached member side has a substantially hemispherical concave portion into which the second fixing portion on the motor side is fitted. The motor mounting structure described. The first fixing portion provided on the attached member side includes an insertion portion into which the second fixing portion on the motor side is inserted, and a second fixing portion on the motor side inserted from the insertion portion. 9. The guide passage portion for guiding in a circumferential direction centering on a drive shaft of the motor, and a substantially hemispherical recess portion into which the second fixing portion on the motor side is fitted. Motor mounting structure. 10. The motor mounting structure according to claim 9, wherein the first fixing portion provided on the mounted member side is provided so as to be elastically deformable in an outer peripheral direction centering on a drive shaft of the motor. . A motor for driving at least a part of the image forming member;
A frame member to which the motor is detachably attached;
A recess for insertion that is provided in the frame member and is inserted in a state where a part of the motor or an attachment auxiliary member mounted on the motor is positioned;
By rotating the motor or the mounting auxiliary member around the drive shaft of the motor in a state where a part of the motor or the mounting auxiliary member attached to the motor is inserted into the insertion recess, the motor A first fixing portion provided on the frame member side and a second fixing portion provided on the motor or the auxiliary mounting member side are relatively fitted and fixed. An image forming apparatus.

Images