JP6003101B2 - Motor, motor drive device, image forming apparatus, peripheral device of image forming apparatus - Google Patents

Description

  The present invention relates to a motor, a motor driving device, an image forming apparatus, and a peripheral device of the image forming apparatus.

  Image forming apparatuses that fix a toner image on a sheet-like recording medium such as paper, recording paper, transfer paper, and peripheral devices (hereinafter referred to as “peripheral machines”) of image forming apparatuses that convey the sheet-like recording medium are widely used. Are known.

  Such image forming apparatuses and peripheral devices include various pickup rollers such as a pickup roller that feeds a sheet-like recording medium from a storage unit, a photosensitive drum that forms an electrostatic latent image, and a transfer roller that transfers a toner image to the sheet-like recording medium. These rotating bodies are provided, and these rotating bodies are rotationally driven by a plurality of motors.

  In addition, since it is necessary to control the feed amount of the sheet-like recording medium in the image forming apparatus and the peripheral device, a known stepping motor capable of controlling the rotation speed and the rotation amount (rotation angle) is used as the motor. Has been.

  Incidentally, a motor such as a stepping motor mounted on an image forming apparatus or a peripheral device includes a motor housing formed in a bottomed cylindrical shape, and an attachment member provided on the bottom of the motor housing. The attachment member is attached to a motor fixing portion of an image forming apparatus or a peripheral machine by a screw member such as a bolt or a screw (for example, see Patent Document 1 or Patent Document 2).

  Further, as shown in FIGS. 20 to 22, the screw member 215 inserted through the insertion hole 211 of the motor fixing portion 209 is inserted into the screw hole 207 provided in the bottom portion of the motor housing 202 formed in the bottomed cylindrical shape. There is a motor 201 that is screwed into the screw hole 207 and fixed to the motor fixing portion 209.

  However, the conventional motor shown in Patent Document 1 or Patent Document 2 and the conventional motor 202 as shown in FIGS. 20 to 22 are provided with a motor fixing unit 209 during the manufacture of an image forming apparatus or a peripheral device. Therefore, the screwing is performed only from the direction facing the motor 202, that is, the screwing is performed from only one direction. Therefore, the degree of freedom of the assembling work is limited, and the assembling property of the motor 202 at the time of manufacture is low.

  As described above, since the screw is fixed only in one direction, when removing the motor 202 at the time of repair or the like, the motor 202 can be removed only from one direction, and the degree of freedom of the removal work is limited, and the motor at the time of repair or the like is limited. The removability of 202 is low. In addition, since the motor 202 fixed to the motor fixing unit 209 is accessed only from one direction, it takes time until the motor 202 becomes accessible. As a result, there is a limit to shortening the repair time.

  The present invention aims to solve this problem. That is, the present invention improves assembly by making it possible to attach from both sides of the motor fixing part, and improves detachability and shortens repair time by making it removable from both sides of the motor fixing part. An object of the present invention is to provide a motor, a motor drive device, an image forming apparatus, and a peripheral device for the image forming apparatus.

  In order to solve the above-described problems and achieve the object, a motor of the present invention includes a motor housing in which a rotor is inserted, an attachment member that is overlapped on the outside of the bottom of the motor housing and fixed to the motor housing, The mounting member is formed with a protruding portion that protrudes in a direction perpendicular to the motor housing from the bottom of the motor housing when the mounting member is fixed on the outside of the bottom of the motor housing. The attachment member is provided with a first screw hole that is screwed into the screw portion of the first screw member, and a second insertion hole through which the screw portion of the second screw member is inserted, and the first screw hole is The second insertion hole is communicated with a second screw hole provided in the motor fixing portion, and the second screw hole is connected to the second screw hole. Part The screw portion of the first screw member is inserted into the first insertion hole, the screw portion of the second screw member is inserted into the second insertion hole, and the bottom portion of the motor housing is inserted into the first insertion hole. Is provided with a receiving hole for receiving a tip portion of the screw portion of the first screw member, the receiving hole is inserted into the first screw hole, and the second insertion hole is provided in the protruding portion. It is characterized by being.

  In the motor of the present invention, the mounting member is provided with a first screw hole and a second insertion hole, the first screw hole is communicated with a first insertion hole provided in the motor fixing portion, and the second insertion hole is formed in the first insertion hole. Communicating with a second screw hole provided in the motor fixing portion, screwing the second screw hole into the screw portion of the second screw member, and inserting the screw portion of the first screw member into the first insertion hole. The screw portion of the second screw member is inserted into the second insertion hole, and a receiving hole for receiving the tip portion of the screw portion of the first screw member is provided in the bottom portion of the motor housing, and the receiving hole is formed in the first hole. Since the second insertion hole is provided in the protruding portion through the screw hole, the first screw member is inserted into the first screw hole of the mounting member through the first insertion hole of the motor fixing portion. The second insertion hole of the protruding portion is inserted into the second screw hole of the motor fixing portion. Flip can screwing the member.

  As described above, the first screw hole can be inserted into the first screw hole of the mounting member through the first insertion hole of the motor fixing portion, and the motor fixing portion can be inserted through the second insertion hole of the protruding portion. Since the second screw member can be screwed into the second screw hole, the first screw member can be screwed from one surface side of the motor fixing portion, and the second screw member can be screwed to the other of the motor fixing portion. The motor can be attached to the motor fixing part from both sides of the motor fixing part. As a result, the workability of the assembling work is improved and the motor is assembled at the time of manufacture. Can be improved.

  Further, since the motor can be attached to the motor fixing part from both sides of the motor fixing part, the workability of the removal work is improved, the time taken to remove the motor can be shortened, and the repair time can be shortened. .

It is a perspective view for demonstrating the structure of the motor concerning the 1st Embodiment of this invention. It is a perspective view from the other viewpoint of the motor shown in FIG. It is a perspective view for demonstrating the structure of the motor main body and attachment member which comprise the motor shown in FIG. It is explanatory drawing for demonstrating the state which attaches a motor from one side of a motor fixing | fixed part. It is explanatory drawing for demonstrating the state which attached the motor from the one side of a motor fixing | fixed part. It is explanatory drawing for demonstrating the state which attaches a motor from the other side of a motor fixing | fixed part. It is explanatory drawing for demonstrating the state which attached the motor from the other side of the motor fixing | fixed part. It is a perspective view for demonstrating the structure of the motor concerning the 2nd Embodiment of this invention. It is a perspective view for demonstrating the structure of the motor main body and attachment member which comprise the motor shown in FIG. It is a perspective view for demonstrating the structure of the motor concerning the 3rd Embodiment of this invention. It is a perspective view for demonstrating the structure of the motor main body and attachment member which comprise the motor shown in FIG. It is a perspective view for demonstrating the structure of the motor concerning the 4th Embodiment of this invention. It is explanatory drawing for demonstrating the state which attaches a motor to a motor fixing | fixed part. (A) is the figure of the state positioned, (B) is the figure of the state fixed temporarily. It is explanatory drawing of the state by which the motor was fixed to the motor fixing | fixed part. It is explanatory drawing for demonstrating the structure of the motor drive device concerning the 5th Embodiment of this invention. It is explanatory drawing for demonstrating the control structure of the motor drive device shown in FIG. It is explanatory drawing for demonstrating the structure of the image forming apparatus concerning the 6th Embodiment of this invention. FIG. 18 is an explanatory diagram for explaining a configuration of a process unit in the image forming apparatus shown in FIG. 17. It is explanatory drawing for demonstrating the structure of the original document conveying apparatus concerning the 7th Embodiment of this invention. It is a perspective view of the conventional motor. It is explanatory drawing of the state which attaches the conventional motor to a motor fixing | fixed part. It is explanatory drawing of the state which attached the conventional motor to the motor fixing | fixed part.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiments of the present invention described below are merely representative embodiments of the present invention, and the present invention is not limited to the embodiments. Therefore, the present invention can be implemented in various modifications without departing from the gist of the present invention, that is, those that can be easily conceived by those skilled in the art, substantially the same, and so-called equivalent ranges.

(First embodiment)
1 to 3 are configuration diagrams of the motor 131 according to the first embodiment of the present invention. The motor 131 according to the first embodiment of the present invention is used in, for example, an image forming apparatus such as a copying machine, a printer, or a facsimile, and can control the rotation speed and the rotation amount (rotation angle). It is a stepping motor or an inner rotor type DC brushless motor with an encoder.

  As shown in FIG. 1, the motor 131 according to the first embodiment of the present invention includes a motor housing 157, a motor main body 156 having a rotor rotatably supported in the motor housing 157, and the motor And an attachment member 159 fixed to the bottom portion (see FIG. 3) 157b of the housing 157.

  As shown in FIG. 2, the motor body 156 includes an encoder disk 149, a photo sensor 151, and a drive circuit (not shown) that sequentially switches the current of each phase of the stator winding in synchronization with the rotation of the rotor. Is provided. The motor body 156 may employ a known brushless DC motor configuration such as a radial gap type or an axial gap type.

  The encoder disk 149 is formed in a disk shape with a metal material or a synthetic resin material, and a plurality of slits extending in the radial direction are provided at equal intervals over the entire circumference in the peripheral portion. The encoder disk 149 is fitted to one end of the output shaft 133 of the motor 131.

  The photo sensor 151 is fixed so as to sandwich the encoder disk 149. The photosensor 151 includes two sets of light-emitting elements and light-receiving elements, and is arranged so that each pulse signal phase difference is a predetermined amount (π / 2 [rad] in this embodiment).

  The light receiving element is composed of, for example, a light emitting diode, and the light receiving element is composed of, for example, a phototransistor. The photo sensor 151 reflects light at a portion of the encoder disk 149 where there is no slit, detects light with a light receiving element, generates a pulse signal based on the presence or absence of the detection, and sends the pulse signal to the control circuit. introduce.

  As shown in FIG. 3, the motor housing 157 includes a cylindrical peripheral wall portion 157a and a bottom portion 157b that closes one edge of the peripheral wall portion 157a, and is formed in a bottomed cylindrical shape. Yes. The motor housing 157 is made of alloy steel such as stainless steel, for example.

  The peripheral wall 157a of the motor housing 157 is provided with a connector 154 for supplying a motor driving current from the driver circuit.

  The bottom portion 157b is formed in a circular shape, and the output shaft 133 protrudes from the center portion. The bottom portion 157b is provided with a receiving hole 181 for receiving a tip portion of a screw portion (see FIG. 4) 175b of the first screw member 175.

  A gear 135 is formed at the tip of the output shaft 133. The output shaft 133 is made of, for example, an alloy steel such as carbon steel for machine structure, and the strength is improved by a treatment such as quenching. Note that a gear member may be provided at the tip of the output shaft 133.

  A plurality (four in the illustrated example) of receiving holes 181 are provided on the concentric circle of the output shaft 133. The receiving hole 181 is formed in a circular shape that is slightly larger than the outer diameter of the screw portion 175b of the first screw member 175, and is set to a depth that does not contact the tip of the screw portion 175b of the first screw member 175. Yes. The receiving hole 181 is provided corresponding to the opening position of the first screw hole 183 of the mounting member 159 described later.

  The attachment member 159 is formed in a thin plate-like rhombus shape, and is made of, for example, an alloy steel such as stainless steel. The attachment member 159 is integrally fixed to the bottom portion 157b of the motor housing 157 by welding.

  The mounting member 159 has a protruding portion 159 a that protrudes from the bottom portion 157 b of the motor housing 157 in a direction perpendicular to the motor housing 157 when the mounting member 159 is fixed to the outside of the bottom portion 157 b of the motor housing 157. Has been.

  A first screw hole 183 that is screwed into a screw portion (see FIG. 4) 175b of the first screw member 175 and a screw portion (see FIG. 6) 176b of the second screw member 176 are inserted into the mounting member 159. A second insertion hole 165 and an opening 167 through which the output shaft 133 is inserted are provided.

  A plurality of (four in the illustrated example) first screw holes 183 are provided on the concentric circle of the output shaft 133. The first screw hole 183 is formed with a screw thread that engages with the screw portion 175 b of the first screw member 175. The first screw hole 183 is formed through the attachment member 159.

  The first screw hole 183 is provided corresponding to the receiving hole 181 of the bottom portion 157b of the motor housing 157. When the mounting member 159 is fixed to the bottom portion 157b, the receiving hole 181 communicates with the first screw hole 183. It has come to be. The first screw hole 183 is a first screw hole inserted through the first insertion hole 173 of the motor fixing portion 171 when the mounting member is screwed to the motor fixing portion (see FIG. 4) 171 by the first screw member 175. Screwed with the screw member 175.

  A plurality (two in the illustrated example) of the second insertion holes 165 are also received, and one second insertion hole 165 is provided in each protruding portion 159a. The second insertion hole 165 is formed in a circular shape that is slightly larger than the outer shape of the threaded portion 176 b of the second screw member 176. The second insertion hole 165 communicates with the first insertion hole 173 of the motor fixing portion 171 when the attachment member 159 is screwed to the motor fixing portion 171 with the second screw member 176.

  The motor fixing part 171 to which the motor 131 is attached is formed in a plate shape, for example, as shown in FIGS. The motor fixing portion 171 is not limited to a plate shape, for example, a panel member constituting a housing of an image forming apparatus or a peripheral machine, a bracket member for fixing the motor 131, and the mounting location is appropriately set. Can be set.

  The motor fixing portion 171 includes an opening 179 through which the output shaft 133 of the motor 131 is inserted and a screw portion 175b of the first screw member 175 for fixing the motor 131 by screwing from the one surface 171a side. A first insertion hole 173 and a second screw hole 177 that is screwed into the screw portion 176b of the second screw member 176 for fixing the motor 131 by screwing from the other surface 171b side are provided.

  The first insertion hole 173 is formed in a circular shape that is slightly larger than the outer shape of the threaded portion 175 b of the first screw member 175. The first insertion hole 173 is provided corresponding to the opening position of the first screw hole 183 of the attachment member 159.

  The second screw hole 177 is provided corresponding to the opening position of the second insertion hole 165 of the attachment member 159. In the second screw hole 177, a screw thread that is screwed into the screw portion 176b of the second screw member 176 is formed.

  Next, with reference to FIGS. 4 and 5, the attachment of the motor 131 configured as described above to the motor fixing portion 171 according to the first embodiment of the present invention will be described. 4 and 5 are diagrams showing an attachment method when the motor 131 is attached by the first screw member 175 from the one surface 171a side.

  As shown in FIG. 4, the motor 131 is disposed on the other surface 171 b side of the motor fixing portion 171, and the first insertion hole 173 of the motor fixing portion 171 is inserted into the first insertion hole 173 from the one surface 171 a side of the motor fixing portion 171. The screw member 175 is inserted, and the first screw member 175 is screwed into the first screw hole 183 of the mounting member 159.

  At this time, the screw portion 175 b of the first screw member 175 passes through the first insertion hole 173 of the motor fixing portion 171 and is screwed into the first screw hole 183 of the mounting member 159.

  Then, by tightening the first screw member 175, as shown in FIG. 5, the attachment member 159 is fastened to the motor fixing portion 171, and the motor 131 is attached to the motor fixing portion 171.

  In this way, the assembling work for attaching the motor 131 to the motor fixing portion 171 is completed from the one surface 171a side of the motor fixing portion 171. In addition, when performing the removal work which removes the motor 131 from the motor fixing | fixed part 171, the procedure of the above-mentioned assembly work is performed reversely.

  Next, with reference to FIGS. 6 and 7, attachment of the motor 131 configured as described above to the motor fixing portion 171 according to the first embodiment of the present invention will be described. FIG. 6 and FIG. 7 are diagrams showing an attachment method when the motor 131 is attached by the second screw member 176 from the other surface 171b side.

  As shown in FIG. 6, the motor 131 is disposed on the other surface 171 b side of the motor fixing portion 171, and the second screw member is inserted into the second insertion hole 165 of the mounting member 159 from the other surface 171 b side of the motor fixing portion 171. 176 is inserted, and the second screw member 176 is screwed into the second screw hole 177 of the motor fixing portion 171.

  At this time, the screw portion 176 b of the second screw member 176 passes through the second insertion hole 165 of the attachment member 159 and is screwed into the second screw hole 177 of the motor fixing portion 171.

  Then, by tightening the second screw member 176, as shown in FIG. 7, the attachment member 159 is fastened to the motor fixing portion 171, and the motor 131 is attached to the motor fixing portion 171.

  In this manner, the assembling work for attaching the motor 131 to the motor fixing portion 171 is completed from the other surface 171b side of the motor fixing portion 171. In addition, when performing the removal work which removes the motor 131 from the motor fixing | fixed part 171, the procedure of the above-mentioned assembly work is performed reversely.

  The first screw member 175 and the second screw member 176 use the same type of screw member, but it is also possible to use screw members having different screw lengths, outer diameters, and other forms. Further, since it is sufficient that the attachment member 159 can be fastened to the motor fixing portion 171, a fastening means such as a bolt can be used.

  4 to 7, the motor fixing portion 171 is not provided with the second screw hole 177 when the first insertion hole 173 is provided in the motor fixing portion 171. When the second screw hole 177 is provided in the motor fixing portion 171, the first insertion hole 173 is not provided, but the first insertion hole 173 and the second screw hole 177 are provided. It may be.

  When the motor insertion portion 171 is provided with the first insertion hole 173 and the second screw hole 177, from the direction (one surface 171a side or the other surface 171b side) in which workability is better for the worker. The motor 131 can be attached to the motor fixing portion 171. In addition, the motor 131 can be firmly attached by the motor fixing portion 171 by fastening the attachment member 159 more firmly by the first screw member 175 and the second screw member 176, respectively.

  As described above, the motor 131 can be assembled from the one surface 171a side of the motor fixing portion 171 and the motor 131 can be assembled from the other surface 171b side of the motor fixing portion 171, thus improving the workability of the assembling work. Assembling performance of the motor 131 at the time of manufacture is improved by improving workability, and it takes less time to remove the motor 131 by improving workability of removing work, thereby shortening repair time. Can do.

  As described above, the motor 131 according to the first embodiment of the present invention is overlapped with the motor housing 157 into which the rotor is inserted and the outside of the bottom portion 157b of the motor housing 157. In the motor 131 having the mounting member 159 fixed to the motor housing 157, when the mounting member 159 is fixed to the mounting member 159 so as to overlap the outside of the bottom portion 157b of the motor housing 157, the bottom portion 157b of the motor housing 157 is removed. A protruding portion 159 a that protrudes in a direction orthogonal to the motor housing 157 is formed. The mounting member 159 has a first screw hole 183 and a second screw member 176 that are screwed into the screw portion 175 b of the first screw member 175. A second insertion hole 165 through which the screw portion 176b of the first screw hole 176b is inserted. 3 is communicated with a first insertion hole 173 provided in the motor fixing portion 171, and the second insertion hole 165 is communicated with a second screw hole 177 provided in the motor fixing portion 171, and the second screw The hole 177 is screwed with the screw portion 176b of the second screw member 176, the screw portion 175b of the first screw member 175 is inserted into the first insertion hole 173, and the second insertion hole 165 is The screw portion 176b of the second screw member 176 is inserted, and a receiving hole 181 for receiving the tip portion of the screw portion 175b of the first screw member 175 is provided in the bottom portion 157b of the motor housing 157, and the receiving hole 181 is The second insertion hole 165 is inserted into the first screw hole 183 and provided in the protruding portion 159a.

  That is, the mounting member 159 is provided with a first screw hole 183 and a second insertion hole 165, the first screw hole 183 is communicated with the first insertion hole 173 provided in the motor fixing portion 171, and the second insertion hole 165 is communicated with a second screw hole 177 provided in the motor fixing portion 171, the second screw hole 177 is screwed into a screw portion 176 b of the second screw member 176, and the screw of the first screw member 175 is The portion 175b is inserted through the first insertion hole 173, the screw portion 176b of the second screw member 176 is inserted through the second insertion hole 165, and the screw portion of the first screw member 175 is inserted into the bottom portion 157b of the motor housing 157. A receiving hole 181 for receiving the distal end portion of 175, the receiving hole 181 being inserted into the first screw hole 183, and the second inserting hole 165 being provided in the protruding portion 159a. Therefore, the first screw hole 173 of the mounting member 159 can be screwed into the first screw hole 183 of the mounting member 159 through the first insertion hole 173 of the motor fixing portion 171, and the second insertion hole 165 of the protruding portion 159 a can be formed. The second screw member 176 can be screwed into the second screw hole 177 of the motor fixing portion 171 by being inserted.

  Accordingly, the first screw member 175 can be screwed into the first screw hole 183 of the mounting member 159 through the first insertion hole 173 of the motor fixing portion 171, and the second insertion hole 165 of the protruding portion 159 a can be inserted. Since the second screw member 176 can be screwed into the second screw hole 177 of the motor fixing portion 171, the first screw member 175 can be screwed from the one surface 171 a side of the motor fixing portion 171. The second screw member 176 can be screwed from the other surface 171b side of the motor fixing portion 171. For this reason, the motor 131 can be attached to the motor fixing portion 171 from both sides of the motor fixing portion 171. As a result, the workability of the assembly work can be improved, and the ease of assembly of the motor 131 at the time of manufacture can be improved.

  Further, since the motor 131 can be attached to the motor fixing portion 171 from both sides of the motor fixing portion 171, the workability of the removal work is improved, the time taken to remove the motor 131 is shortened, and the repair time is shortened. can do.

  Further, since the motor 131 according to the first embodiment of the present invention is an inner rotor type DC brushless motor with an encoder or a stepping motor, it can be controlled to a desired rotational speed or rotational angle.

(Second Embodiment)
Next, a motor 131A according to a second embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 8 is a configuration diagram of a motor 131A according to the second embodiment of the present invention. FIG. 9 is a configuration diagram of the motor main body 156A and the attachment member 159A. Note that the same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, the motor 131A according to the second embodiment of the present invention has a mounting member 159A fixed to the bottom (see FIG. 9) 157b of the motor housing 157A.

  As shown in FIG. 9, the bottom portion 157b of the motor housing 157 is provided with a first screw hole 161 that is screwed with a screw portion of a first screw member (not shown).

  A plurality of (four in the illustrated example) first screw holes 161 are provided on concentric circles of the output shaft 133. The first screw hole 161 is formed with a screw thread that is screwed into the screw portion of the first screw member. The first screw hole 161 is provided corresponding to the opening position of the first insertion hole 163 of the attachment member 159A.

  The mounting member 159A has a protruding portion 159a that protrudes in a direction orthogonal to the motor housing 157A from the bottom portion 157b of the motor housing 157A when the mounting member 159A is fixed to the outside of the bottom portion 157b of the motor housing 157A. Has been.

  A first insertion hole 163 through which the screw portion of the first screw member is inserted, a third insertion hole 166 through which the screw portion of the second screw member (not shown) is inserted, and the output shaft 133 are inserted into the mounting member 159A. An opening 167 is provided for this purpose.

  A plurality (four in the illustrated example) of the first insertion holes 163 are also received on the concentric circle of the output shaft 133. The first insertion hole 163 is formed through the attachment member 159. The first insertion hole 163 is formed in a circular shape that is slightly larger than the outer shape of the threaded portion of the first screw member. The first insertion hole 163 is provided corresponding to the first screw hole 161 of the bottom portion 157b of the motor housing 157A. When the mounting member 159A is fixed to the bottom portion 157b, the first screw hole 161 is inserted into the first insertion hole 163. The hole 163 communicates.

  A plurality of (three in the illustrated example) third insertion holes 166 are provided, and one third insertion hole 166 is provided for each protruding portion 159a. The third insertion hole 166 is formed in a circular shape that is slightly larger than the outer shape of the threaded portion of the second screw member. The third insertion hole 166 is screwed into the second screw hole (see FIG. 7) 177 of the motor fixing portion 171 when the attachment member 159A is screwed to the motor fixing portion 171 by the second screw member.

  A motor fixing portion (not shown) to which the motor 131A is attached has an opening for inserting the output shaft 133 of the motor 131A and a screw of a first screw member for fixing the motor 131A by screwing from one surface side. And a second screw hole that is screwed into a screw portion of a second screw member for fixing the motor 131A by screwing from the other surface side.

  The second insertion hole is formed in a circular shape that is slightly larger than the outer shape of the threaded portion of the first screw member. The second insertion hole is provided corresponding to the opening position of the first screw hole of the mounting member 159A.

  The second screw hole is provided corresponding to the opening position of the third insertion hole 166 of the attachment member 159A. The second screw hole is formed with a screw thread that is screwed into the screw portion of the second screw member.

  As described above, the motor 131A according to the second embodiment of the present invention is superimposed on the motor housing 157A in which the rotor is inserted, and the outside of the bottom portion 157b of the motor housing 157A. In the motor 131A having the attachment member 159A fixed to the first member, the bottom portion 157b of the motor housing 157A is provided with a first screw hole 161 that engages with the screw portion of the first screw member, and the attachment member 159A has When the mounting member 159A is fixed on the outside of the bottom portion 157b of the motor housing 157A, a protruding portion 159a protruding from the bottom portion 157b of the motor housing 157A in a direction perpendicular to the motor housing 157A is formed. In 159A, the thread portion of the first screw member is inserted. A first insertion hole 163 and a third insertion hole 166 through which the screw portion of the second screw member is inserted, and the first insertion hole 163 is provided in the first screw hole 161 and the motor fixing portion. The third insertion hole 166 communicates with each of the second insertion holes provided, the third insertion hole 166 communicates with a second screw hole provided in the motor fixing portion 171, and the first screw member communicates with the second insertion hole. The screw portion of the second screw member is inserted into the third insertion hole 166, and the third insertion hole 166 is provided in the protruding portion 159a.

  Therefore, the first screw member 175 can be screwed into the first screw hole of the bottom portion 157b of the motor housing 157A by inserting the second insertion hole of the motor fixing portion and the first insertion hole of the mounting member 159A. In addition, since the second screw member can be screwed into the second screw hole of the motor fixing portion through the third insertion hole 166 of the protruding portion 159a, one of the motor fixing portions can be inserted by the first screw member. The motor 131A can be screwed from the surface side, and the motor 131A can be screwed from the other surface side of the motor fixing portion 171 by the second screw member. 131A can be attached to the motor fixing portion. As a result, the workability of the assembling work is improved, and the assembling property of the motor 131A at the time of manufacture can be improved.

  In addition, since the motor 131A can be attached to the motor fixing portion from both sides of the motor fixing portion, the workability of the removal work is improved, the time taken to remove the motor 131A is shortened, and the repair time is shortened. Can do.

  Further, when it is determined that the first screw hole 161 in the bottom portion 157b of the motor housing 157A is fixed, the motor 131A can be directly attached to the motor fixing portion without using the attachment member 159A.

(Third embodiment)
Next, a motor 131B according to a third embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 10 is a configuration diagram of a motor 131B according to the third embodiment of the present invention. FIG. 11 is a configuration diagram of the motor main body 156B and the attachment member 159B. The same parts as those in the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 10, the motor 131B according to the third embodiment of the present invention has a mounting member 159B fixed to the bottom (see FIG. 11) 157b of the motor housing 157B.

  The mounting member 159B has a protruding portion 160 that protrudes from the bottom portion 157b of the motor housing 157B in a direction perpendicular to the motor housing 157B when the mounting member 159B is fixed to the outside of the bottom portion 157b of the motor housing 157B. Has been.

  The protruding portion 160 of the attachment member 159B has a first screw hole 185 screwed with a screw portion of a first screw member (not shown), and a second insertion hole 187 through which the screw portion of a second screw member (not shown) is inserted. , Is provided.

  The first screw holes 185 are provided point-symmetrically around the output shaft 133. The 1st screw hole 185 is provided corresponding to the 1st penetration hole provided in the motor fixed part which is not illustrated. The first screw hole 185 is formed with a screw thread to be screwed with the screw portion of the first screw member.

  The second insertion hole 187 is provided point-symmetrically with the output shaft 133 as the center. The 2nd penetration hole 187 is provided corresponding to the 2nd screw hole provided in the motor fixed part which is not illustrated. The second insertion hole 187 is formed in a circular shape that is slightly larger than the outer shape of the threaded portion of the second screw member.

  The motor fixing portion to which the motor 131B is attached includes an opening for inserting the output shaft 133 of the motor 131B and a screw portion of a first screw member for fixing the motor 131B by screwing from one surface side. A first insertion hole and a second screw hole to be screwed with a screw portion of a second screw member for fixing the motor 131B by screwing from the other surface side are provided.

  The first insertion hole is formed in a circular shape that is slightly larger than the outer shape of the threaded portion of the first screw member. The first insertion hole is provided corresponding to the opening position of the first screw hole 185 of the attachment member 159B.

  The second screw hole is provided corresponding to the opening position of the second insertion hole 187 of the attachment member 159B. The second screw hole is formed with a screw thread that is screwed into the screw portion of the second screw member.

  As described above, the motor 131B according to the third embodiment of the present invention is overlapped with the motor housing 157B in which the rotor is inserted and the outside of the bottom portion 157b of the motor housing 157B. In the motor 131B having the mounting member 159B fixed to the motor housing 157B, when the mounting member 159B is fixed to the mounting member 159B so as to overlap the outside of the bottom portion 157b of the motor housing 157B, the bottom of the motor housing 157B is fixed. A protruding portion 160 that protrudes in a direction orthogonal to the motor housing 157B is formed. The mounting member 159B has a first screw hole 185 screwed with the screw portion 175b of the first screw member 175, and a second screw member. A second insertion hole 187 through which the screw portion is inserted, and the first insertion hole The through hole 185 communicates with a first insertion hole provided in the motor fixing portion, and the second insertion hole 187 communicates with a second screw hole provided in the motor fixing portion. The screw portion of the first screw member is inserted, the screw portion of the second screw member is inserted into the second insertion hole 187, and each of the first screw hole 185 and the second insertion hole 187 is The protruding portion 160 is provided.

  For this reason, the first screw member 175 can be screwed into the first screw hole 185 of the mounting member 159B through the first insertion hole of the motor fixing portion, and the second insertion hole of the mounting member 159B can be inserted. Since the second screw member can be screwed into the second screw hole of the motor fixing portion, the first screw member can be screwed from one surface side of the motor fixing portion, and the second screw member is fixed to the motor. Can be screwed from the other surface side of the part, so that the motor 131B can be attached to the motor fixing part from both sides of the motor fixing part. As a result, the workability of the assembling work is improved, Assembling property of the motor 131B can be improved.

  Further, since the motor 131B can be attached to the motor fixing portion from both sides of the motor fixing portion, the workability of the removal work is improved, the time taken to remove the motor 131B is shortened, and the repair time is shortened. Can do.

  Further, since a screw hole, a receiving hole, or the like is not provided in the bottom portion 157b of the motor housing 157B of the motor 131B, the axial space of the output shaft 133 in the motor housing 157B can be used effectively, or The axial direction of the output shaft 133 of the motor housing 157B can be reduced in size.

(Fourth embodiment)
Next, a motor 131C according to a fourth embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 12 is a configuration diagram of a motor 131C according to the fourth embodiment of the present invention. FIG. 13 is an explanatory diagram of a mode in which the motor 131C is temporarily fixed to the motor fixing portion 171. FIG. 14 is a view showing a state where the motor 131C is fixed to the motor fixing portion 171 via the mounting member 159C. The same parts as those in the first to third embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 12, the motor 131C according to the fourth embodiment of the present invention includes a positioning member 191 for positioning the motor 131C with respect to the motor fixing portion (see FIG. 13A) 171; The provision of the engaging claw 193 for temporarily fixing the motor 131C with respect to the motor fixing portion 171 on the mounting member 159C results in the motors 131, 131A, 131B according to the first to third embodiments described above. And different. That is, the motor 131 </ b> C according to the fourth embodiment of the present invention is temporarily fixed to the motor fixing unit 171 in a state where the motor 131 </ b> C is positioned with respect to the motor fixing unit 171, thereby attaching the motor 131 </ b> C to the motor fixing unit 171. The purpose is to further improve the workability during assembly.

  As shown in FIG. 12, the motor 131C has a mounting member 159C fixed to the bottom of the motor housing 157C. The mounting member 159C has a first screw hole that is screwed with a screw portion of a first screw member (not shown), and a second insertion hole 165 through which a screw portion (see FIG. 14) 176b of the second screw member 176 is inserted. A positioning member 191 for positioning the mounting position with the motor fixing portion (see FIG. 13A) 171, and an engaging claw 193 for temporarily fixing the motor 131C to the motor fixing portion 171 , Is provided.

  The 1st screw hole which is not illustrated is provided in point symmetry centering on the output axis 133, for example. The first screw hole is provided corresponding to a first insertion hole (not shown) opened in the motor fixing portion (see FIG. 13A) 171. The first screw hole is formed with a screw thread that is screwed with a screw portion of a first screw member (not shown).

  The second insertion holes 165 are provided point-symmetrically around the output shaft 133. The second insertion hole 165 is provided corresponding to a second screw hole (see FIG. 13A) 177 formed in the motor fixing portion 171. The second insertion hole 165 is formed in a circular shape slightly larger than the outer diameter of the threaded portion (see FIG. 14) 176b of the second screw member 176.

  The positioning member 191 is provided so as to protrude from the mounting member 159 </ b> C, and is formed in an annular shape centering on the output shaft 133. The outer diameter of the positioning member 191 is slightly smaller than an opening (see FIG. 13A) 179 that is formed in a circular shape in a motor fixing portion 171 described later.

  The engaging claw 193 is provided so as to protrude in the radial direction from the outer peripheral surface 191a of the positioning member 191, and is formed to be smaller than the notch portion (see FIG. 13A) 179a formed in the motor fixing portion 171. Yes. The engaging claw 193 is formed so that the circumferential side of the output shaft 133 is wide. The engaging claw 193 is formed with an engaging surface 193 a that engages with one surface 171 a (see FIG. 14) of the motor fixing portion 171.

  The engagement surface 193a is formed on the opposite side of the front surface 193b connected to the end surface of the positioning member 191, and the engagement claw 193 gradually becomes thinner from one end to the other end on the circumferential side of the output shaft 133. It is formed as an inclined surface in which the gap with the surface of the mounting member 159C gradually widens. Note that the engaging surface 193a engages with the other surface 171b when the mounting direction of the motor 131C with respect to the motor fixing portion 171 is opposite to the illustrated example of FIG.

  As shown in FIG. 13A, the motor fixing portion 171 is screwed with an opening 179 through which the output shaft 133 of the motor 131C is inserted and the motor 131C from one side (see FIG. 14) 171a side. And a second screw member 176 for screwing and fixing the motor 131 from the first insertion hole (not shown) of the screw portion of the first screw member for fixing the motor 131 from the other surface (see FIG. 14) 171b side. And a second screw hole 177 to be screwed with the screw portion (see FIG. 14) 176b.

  A first insertion hole (not shown) is formed in a circular shape that is slightly larger than the outer diameter of the threaded portion of the first screw member. The first insertion hole is provided corresponding to the opening position of the first screw hole of the attachment member 159C.

  The second screw hole 177 is provided corresponding to the opening position of the second insertion hole 165 of the attachment member 159C. The second screw hole 177 is formed with a screw thread that is screwed into the screw portion 176 b of the second screw member 176.

  As described above, since the first screw hole and the second insertion hole 165 are provided in the mounting member 159C, and the first insertion hole and the second screw hole 177 are provided in the motor fixing portion 171, the one surface 171a or the other The motor 131C can be attached to the motor fixing portion 171 from any of the surfaces 171b.

  Next, the form which attaches the motor 131C concerning 4th Embodiment comprised as mentioned above to the motor fixing | fixed part 171 is demonstrated with reference to FIG. 13 and FIG. FIG. 13 is an explanatory diagram of a state in which the motor 131C is positioned with respect to the motor fixing portion 171 and a state in which the motor 131C is temporarily fixed. FIG. 14 is a diagram showing a state in which the temporarily fixed motor 131C is permanently fixed by the second screw member 176.

  As shown in FIG. 13A, the output shaft 133 is inserted through the opening 179 from the other surface 171b side, and the engaging claw 193 is inserted through the notch 179a. At this time, the positioning member 191 is inserted into the opening 179, the positioning member 191 is pivotally supported by the opening 179, and the motor 131C can rotate in the circumferential direction of the output shaft 133. Further, the positioning member 191 is pivotally supported in the opening 179, and the motor 131C is positioned at the mounting position of the motor fixing portion 171.

  Subsequently, as shown in FIG. 13B, the motor 131C is rotated clockwise on the paper surface until the second insertion hole 165 and the second screw hole 177 coincide with each other. At this time, as shown in FIG. 14, the engaging surface 193 a of the engaging claw 193 is engaged with one surface 171 a of the motor fixing portion 171, and the motor 131 </ b> C is temporarily fixed to the motor fixing portion 171. At this time, since the positioned motor 131C is temporarily fixed to the motor fixing portion 171, it is possible for an operator to perform work with one hand, and the workability is greatly improved.

  Subsequently, as shown in FIG. 14, the screw portion 176b of the second screw member 176 is inserted into the second insertion hole (see FIG. 13B) 165 from the other surface 171b side, and the screw of the second screw member 176 is inserted. The part 176b is screwed into the second screw hole 177 to fix the motor 131C to the motor fixing part 171.

  As described above, the motor 131C is positioned by the positioning member 191 inserted through the opening 179 using the opening 179 of the motor fixing portion 171. Therefore, the structure of the motor 131C is not complicated and provided at low cost. can do. In addition, since the motor 131C is positioned by the positioning member 191 inserted through the opening 179 using the opening 179 of the motor fixing portion 171, the second screw hole 177 of the motor fixing portion 171 and the first screw 131 of the motor 131C are positioned. The two insertion holes 165 can be aligned with each other reliably.

  In addition, since the motor 131C can be temporarily fixed to the motor fixing portion 171 by the engaging claws 193 while the motor 131C is positioned by the positioning member 191, the mounting position of the motor 131C can be easily aligned. The worker does not have to continue to support the motor 131C by hand, and workability is greatly improved.

  As described above, the motor 131C according to the fourth embodiment of the present invention overlaps the motor housing 157C in which the rotor is inserted and the outside of the bottom portion of the motor housing 157C. In the motor 131C having the mounting member 159C to be fixed, the mounting member 159C includes a positioning member 191 for positioning the mounting position of the motor 131C, and the motor 131C for temporarily fixing the motor 131C to the motor fixing portion 171. Engaging claws 193 are provided.

  For this reason, the motor 131C according to the fourth embodiment of the present invention can be temporarily fixed while being positioned at the mounting position of the motor fixing portion 171. Therefore, the motor 131C is screwed to the motor fixing portion 171. The workability of the assembling work is greatly improved, and the assembling ability of the motor 131C at the time of manufacture can be greatly improved.

(Fifth embodiment)
Next, a motor driving device 52 according to a fifth embodiment of the present invention will be described with reference to the accompanying drawings. 15 and 16 are configuration diagrams of a motor driving device 52 according to the fifth embodiment of the present invention. The same parts as those in the first to fourth embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 15 and 16, a motor drive device 52 according to a fifth embodiment of the present invention includes a motor 131 as a drive source, a power transmission mechanism 54 that transmits the drive force of the motor 131, A roller 147 rotated by the power transmission mechanism 54, a control circuit 152 as a control unit for controlling the motor 131, and a driver for driving the motor 131 based on a signal from the control circuit 152 A circuit 153.

  As the motor 131, any of the motors 131, 131A, 131B, 131C according to the first to fourth embodiments of the present invention described above is used. In the example of illustration, the structure of the inner rotor type | mold DC brushless motor with an encoder is employ | adopted.

  The encoder disk 149 provided in the motor 131 has 100 pulses per revolution. An excessive number of pulses per revolution of the encoder disk 149 leads to an increase in cost, so it is preferable that the number of pulses is 200 or less per revolution.

  Further, the number of pulses per revolution of the encoder disk 149 is preferably 12 × N pulses (N is a natural number) or 50 × N pulses in order to facilitate replacement of a DC brushless motor with a stepping motor.

  The power transmission mechanism 54 meshes with the first reduction gear 137 that meshes with the gear 135 of the output shaft 133 of the motor 131, the second reduction gear 139 that meshes with the first reduction gear 137, and the second reduction gear 139. A third reduction gear 141, a fourth reduction gear 143 that meshes with the third reduction gear 141, and a fifth reduction gear 145 that meshes with the fourth reduction gear 143 are provided.

  The roller 147 is provided on the rotation shaft of the fifth reduction gear 145. The roller 147 is suitably used as various rotating bodies as drive rollers, such as a pickup roller, a photosensitive drum, a transfer roller, and other transport rollers mounted on an image forming apparatus or a peripheral device.

  The control circuit 152 generates an operation signal of the motor 131 based on a signal from a target drive signal generation device (not shown) and the photosensor 151 and sends the operation signal to the driver circuit 153.

  The control circuit 152 includes a target position / speed calculation circuit, a motor position / speed calculation circuit, and a position / speed tracking controller. The control circuit 152 is configured by a one-chip microcomputer, for example.

  The target position / velocity calculation circuit receives a rotation direction signal and a number of movement pulses as a target drive signal from a target drive signal generator (not shown). The target position / speed calculation circuit derives the target position and target speed from the obtained information and time information of an oscillator (not shown), and transmits the target position signal and target speed signal to the position / speed tracking controller. It has become.

  The motor position / speed calculation circuit receives an encoder pulse signal from the photosensor 151. The motor position / speed calculation circuit derives the motor position and motor rotation speed from the input encoder pulse signal, and transmits the motor position signal and motor rotation speed signal to the position / speed tracking controller. It has become.

  The position / speed tracking controller uses the obtained target position, target speed, motor position, and motor rotation speed information so that the target position matches the motor position, and the target speed matches the motor speed. As described above, signals such as pulse width modulation (PWM) output, rotation direction, start, stop, and brake are controlled to be sent to the driver circuit 153 as necessary.

  The driver circuit 153 controls the motor current and the PWM voltage in accordance with each signal from the position / speed tracking controller. Note that the driver circuit 153 may be mounted on the substrate of the motor 131. In this case, the number of harnesses can be reduced, leading to cost reduction.

  Since the motor drive device 52 configured as described above uses the motor 131 (131A, 131B, 131C) according to the first to fourth embodiments of the present invention, the workability of the assembly work of the motor 131 is improved. It is possible to improve the assembling property of the motor 131 at the time of manufacture. Further, the workability of the motor 131 removal work is improved, the time taken to remove the motor 131 can be shortened, and the repair time can be shortened.

  Further, since the gear 135 is directly cut on the output shaft 133 of the motor 131, the reduction ratio of the first stage of the motor can be increased, and the number of parts can be reduced to reduce the cost. In addition, since a ball bearing is used as the bearing of the motor 131 and the frictional force is reduced as compared with the case where a sintered bearing or the like is used, the efficiency is further improved by using the motor 131 which is a DC motor. High durability can be achieved.

  Further, the control circuit 152 can measure the pulse signal from the photosensor 151 to derive the rotation amount and rotation speed of the motor 131 and obtain the position and speed information of the roller 147. The position and speed information of the sheet-like recording medium (see FIG. 17) S conveyed by the roller 147 can be obtained from the information.

  As described above, the motor driving device 52 according to the fifth embodiment of the present invention includes the motor 131, the power transmission mechanism 54 that transmits the driving force of the motor 131, and the control that controls the motor 131. The motor driving device 52 includes a circuit 152, and the motor 131 is one of the motors 131, 131A, 131B, and 131C according to the first to fourth embodiments of the present invention. As a result, the workability of the work of assembling the motor 131 (131A, 131B, 131C) is improved, and the ease of assembling of the motor 131 at the time of manufacture can be improved. Further, the workability of the removal work of the motor 131 (131A, 131B, 131C) is improved, the time taken to remove the motor 131 (131A, 131B, 131C) can be shortened, and the repair time can be shortened. .

(Sixth embodiment)
Next, an image forming apparatus 1 according to a sixth embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 17 is a configuration diagram of an image forming apparatus 1 according to the sixth embodiment of the present invention. FIG. 18 is a configuration diagram of the process unit 5Y in the image forming apparatus 1. The same parts as those in the first to fifth embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  An image forming apparatus 1 according to a sixth embodiment of the present invention includes a copying machine, a printer, a facsimile machine, or a complex machine for fixing a toner image on a sheet-like recording medium S such as paper, recording paper, or transfer paper. It is used as such. In this embodiment, a tandem full-color image forming apparatus is described. However, a 4-cycle full-color image forming apparatus may be used.

  The image forming apparatus 1 includes an exposure device 3 that irradiates a laser beam L, a process unit 5 that forms an electrostatic latent image with the laser beam L and forms a toner image from the electrostatic latent image, and the process unit 5. The intermediate transfer unit 7 to which the toner image is transferred, the secondary transfer unit 8 for transferring the toner image from the intermediate transfer unit 7 to the sheet-like recording medium S, and the transferred toner image to the sheet-like recording medium S. A fixing device 9 for fixing the sheet image, a stock tray 11 for temporarily holding the sheet-like recording medium S on which the toner image is fixed, a paper feed tray 13 for accommodating a plurality of sheet-like recording media S, and a toner bottle. A bottle housing portion 43 for housing.

  The exposure device 3 irradiates the surface of the photosensitive drum 15 charged by the charging device 17 described later with a laser beam L to form an electrostatic latent image corresponding to the image data. The exposure apparatus 3 includes a light source composed of a semiconductor laser that emits laser light L, an optical deflector that deflects the laser light L in the main scanning direction, and a photosensitive drum 15 that uses the deflected laser light L as a surface to be scanned. And an optical scanning optical system that collects light toward the surface.

  The process unit 5 is a process for charging the surface of the photoconductive drum 15, a process for developing a latent electrostatic image on the surface of the photoconductive drum 15 to form a toner image, and a transfer residual toner on the surface of the photoconductive drum 15 is removed. The process is repeated in sequence.

  The process unit 5 applies toner images of yellow, cyan, magenta, and black (hereinafter, “Y”, “C”, “M”, and “K” are attached to members corresponding to the respective colors). Process cartridges 10Y, 10M, 10C, and 10K for generation are provided.

  Each of the process cartridges 10Y, 10M, 10C, and 10K is configured to be detachable from the main body of the image forming apparatus 1, and the corresponding process cartridge can be replaced when the life is reached or exhausted. Yes.

  As shown in FIG. 18, the process cartridge 10Y includes a photosensitive drum 15Y on which an electrostatic latent image is formed by the laser light L emitted from the exposure device 3, a charging device 17Y that charges the photosensitive drum 15Y, A developing device 19Y that develops the electrostatic latent image to form a toner image, and a cleaning device 21Y that cleans the surface of the photosensitive drum 15Y are provided. The process cartridge 10Y contains yellow toner corresponding to the color separation component of the color image.

  The process cartridges 10M, 10C, and 10K have the same configuration as the process cartridge 10Y described above. The process cartridge 10M stores magenta toner corresponding to the color separation component of the color image, and the process cartridge 10C includes The cyan toner corresponding to the color separation component of the color image is accommodated, and the black toner corresponding to the color separation component of the color image is accommodated in the process cartridge 10K.

  The photoconductor drum 15 is made of an aluminum base tube formed in a cylindrical shape, and an organic photoconductor layer is provided on the outer peripheral surface of the aluminum base tube. On the photosensitive drum 15, an electrostatic latent image is formed on the organic photosensitive layer by the laser light L scanned according to the image forming signal, and a toner image as an unfixed image is formed by toner of the developing device 19 described later. It is formed.

  The organic photoreceptor layer includes an undercoat layer coated on the outer peripheral surface of the aluminum base tube, a charge generation layer that generates positive charges and negative charges by photoelectric conversion, and positive charges generated in the charge generation layer. And a charge transport layer for neutralizing negative charges charged on the surface, and an overcoat layer for improving durability.

  The charging device 21 includes a charging member that uniformly charges the surface of the photosensitive drum 15 to a desired polarity and a desired potential by applying a charging bias. As the charging member, for example, a charging roller made of an elastic body, a scorotron charger having a wire electrode and a grid electrode, or the like can be used.

  The developing device 19 performs development by attaching toner to the electrostatic latent image formed on the surface of the photosensitive drum 15. The developing device 19 includes a developing roller as a toner carrier. The developing roller is provided with a magnet roller as a magnetic field generating means. The developing roller rotates while carrying the toner on the surface thereof, thereby conveying the toner to a developing area facing the photosensitive drum 15.

  A developing bias is applied to the developing roller from a developing bias power source. For this reason, in the developing area, a potential difference is generated between the potential on the surface of the developing roller and the potential on the electrostatic latent image portion on the surface of the photosensitive drum 15, and is affected by the developing electric field formed by this potential difference. The toner adheres to the electrostatic latent image portion. As a result, the electrostatic latent image on the photosensitive drum 15 becomes a toner image as an unfixed image. The developing device 19 is not limited to such a configuration, and a known device can be used.

  The cleaning device 21 removes transfer residual toner remaining on the surface of the photosensitive drum 15 without being transferred to the intermediate transfer unit 7 described later from the surface of the photosensitive drum 15. The cleaning device 21 includes a blade member that scrapes off and removes transfer residual toner on the surface of the photosensitive drum 15.

  The blade member is made of a synthetic resin such as polyurethane resin, and is attached to the metal support of the cleaning device 21. The blade member is in a counter direction with respect to the rotation direction of the photosensitive drum 15 and is in contact with the surface of the photosensitive drum 15. In addition to the transfer residual toner, the blade member is included in the paper powder of the sheet-like recording medium S, the discharge product when the photosensitive drum 15 is charged by the charging device 17, the additive added to the toner, and the toner. Impurities and the like are removed from the surface of the photosensitive drum 15.

  The intermediate transfer unit 7 is for transferring the toner image on the surface of the photosensitive drum 15 to the surface of the sheet-like recording medium S. As shown in FIG. 17, the intermediate transfer unit 7 includes an endless intermediate transfer belt 27, a cleaning backup roller 25 and a secondary transfer backup roller on which the intermediate transfer belt 27 is stretched and circulates. 12 and a plurality of primary transfer rollers 29Y, 29M, 29C, and 29K that face the respective photosensitive drums 15 corresponding to the respective colors and press the intermediate transfer belt 27 against the respective photosensitive drums 15 respectively. A belt cleaning device 33.

  The intermediate transfer belt 27 is rotated counterclockwise on the drawing while being held at a predetermined tension by the tension roller 35. The intermediate transfer belt 27 is composed of, for example, a single layer or a plurality of layers of vinylidene fluoride (PVDF) resin, tetrafluoroethylene-ethylene copolymer (ETFE) resin, polyimide (PI) resin, polycarbonate (PC) resin, or the like. In addition, a conductive material such as carbon black is dispersed.

  The primary transfer rollers 29Y, 29M, 29C, and 29K include a conductive material such as carbon black and are semiconductive. The primary transfer rollers 29Y, 29M, 29C, and 29K are biased with a polarity opposite to the polarity of the charge of the toner. Therefore, the toner is attracted from the surface of the photosensitive drum 15 to the intermediate transfer belt 27 side to primarily transfer the toner image to the intermediate transfer belt 27.

  The secondary transfer unit 8 includes a secondary transfer roller 31 that presses the sheet-like recording medium S against the intermediate transfer belt 27. The secondary transfer roller 31 is provided to face the secondary transfer backup roller 12.

  Similar to the primary transfer rollers 29Y, 29M, 29C, and 29K, the secondary transfer roller 31 includes a conductive material such as carbon black and is semiconductive, and has a polarity opposite to the polarity of the toner charge. A bias is applied. Therefore, the toner is attracted from the surface of the intermediate transfer belt 27 to the sheet-like recording medium S side, and the toner image is secondarily transferred to the sheet-like recording medium S.

  The belt cleaning device 33 includes a cleaning blade made of an elastic material such as urethane rubber that contacts the intermediate transfer belt 27. The cleaning blade is detachably held by a swingable blade holder. The cleaning blade contacts the intermediate transfer belt 27 in the counter direction with respect to the circumferential direction of the intermediate transfer belt 27, and dams and removes transfer residual toner on the surface of the intermediate transfer belt 27.

  For this reason, the cleaning blade removes paper powder of the sheet-like recording medium S, additives added to the toner, impurities contained in the toner, and the like from the surface of the intermediate transfer belt 27 in addition to the transfer residual toner. The toner removed from the intermediate transfer belt 27 is collected by a toner collecting unit by a conveying unit provided in the belt cleaning device 33.

  The fixing device 9 heats and pressurizes a toner image as an unfixed image on the sheet-like recording medium S to fix the toner image on the sheet-like recording medium S. The fixing device 9 includes a fixing roller 47 and a pressing roller 49 that presses the fixing roller 47 and rotationally drives the fixing roller 47.

  The fixing roller 47 includes heating means such as a ceramic heater and a halogen heater, and output control is performed based on the surface temperature of the fixing roller 47 detected by a temperature detection sensor (not shown), and the surface temperature of the fixing roller 47 is set to a predetermined level. Hold at temperature.

  The pressing roller 49 is rotationally driven by a driving device such as the motor 131 (131A, 131B, 131C) described above, and rotationally drives the fixing roller 47 that is disposed opposite to and pressed against.

  The paper feed tray 13 is provided in the lower part of the image forming apparatus 1. The sheet feed tray 13 accommodates a plurality of sheet-like recording media S such as recording paper. The sheet-like recording medium S is pulled out from the sheet feeding tray 13 one by one by the sheet feeding roller 37 and is conveyed along the sheet conveying path R formed in the image forming apparatus 1.

  The bolt housing part 43 is provided in the upper part of the image forming apparatus 1. In the bottle housing portion 43, a toner bottle 45Y filled with yellow toner corresponding to the color separation component of the color image, a toner bottle 45M filled with magenta toner corresponding to the color separation component of the color image, and a color A toner bottle 45C filled with cyan toner corresponding to the color separation component of the image and a toner bottle 45K filled with black toner corresponding to the color separation component of the color image are accommodated.

  The toner of each color in each of the toner bottles 45Y, 45M, 45C, and 45K is appropriately supplied to each developing device 19 of each of the process cartridges 10Y, 10M, 10C, and 10K by a toner supply / delivery device (not shown). The toner bottles 45Y, 45M, 45C, and 45K are configured to be detachable from the image forming apparatus 1 independently of the process cartridges 10Y, 10M, 10C, and 10K.

  Next, the basic operation of the image forming apparatus 1 configured as described above will be described.

  When the image forming operation is started in the image forming apparatus 1, each of the photosensitive drums 15 of the process cartridges 10Y, 10M, 10C, and 10K is, for example, the motor 131 according to the first to fourth embodiments described above. , 131A, 131B, and 131C are driven to rotate counterclockwise on the drawing by a motor driving device (see FIG. 15) 52, and the surface of each photoconductive drum 15 is predetermined by each charging device 17. It is uniformly charged to the polarity.

  Next, the surface of each charged photosensitive drum 15 is irradiated with laser light L from the exposure device 3 to form an electrostatic latent image on the surface of each photosensitive drum 15. At this time, the image information exposed to each photosensitive drum 15 is single-color image information obtained by separating a desired full-color image into color information of yellow, magenta, cyan, and black.

  Next, toner is supplied to each electrostatic latent image on the surface of each photosensitive drum 15 by each developing device 19, and a toner image is formed from the electrostatic latent image. Further, a bias having a polarity opposite to the charging polarity of the toner is applied to each of the primary transfer rollers 29Y, 29M, 29C, and 29K. As a result, a transfer electric field is formed between each primary transfer roller 29Y, 29M, 29C, 29K and each photoconductor drum 15, and the toner image formed on each photoconductor drum 15 is transferred by the transfer electric field. The images are sequentially superimposed and transferred onto the intermediate transfer belt 27 that rotates counterclockwise in the drawing. At this time, a full-color toner image is carried on the intermediate transfer belt 27.

  Next, transfer residual toner remaining on the surface of each photoconductive drum 15 after the toner image is transferred is removed from the surface of each photoconductive drum 15 by each cleaning device 21. Next, the surface of each photoconductive drum 15 is subjected to a static elimination action by a static elimination device (not shown), and the surface potential is initialized to prepare for the next image formation.

  Further, the sheet feeding roller 37 is rotated by the driving device 52, and one sheet-like recording medium S is sent out from the sheet feeding tray 13 to the sheet conveying path R. The sheet-like recording medium S sent to the paper transport path R is timed by a pair of registration rollers 39 and sent between the secondary transfer roller 31 and the secondary transfer backup roller 12 facing the secondary transfer roller 31. At this time, a transfer voltage having a polarity opposite to the charged polarity of the toner of the toner image on the intermediate transfer belt 27 is applied to the secondary transfer roller 31, thereby forming a transfer electric field.

  Next, the toner image on the intermediate transfer belt 27 is collectively transferred onto the sheet-like recording medium S by the transfer electric field. Further, the transfer residual toner remaining on the surface of the intermediate transfer belt 27 after the transfer of the toner image is removed by the belt cleaning device 33.

  Next, the sheet-like recording medium S to which the toner image has been transferred is conveyed to the fixing device 9, and the toner image is fixed to the sheet-like recording medium S by applying heat and pressure to the sheet-like recording medium S. The Thereafter, the sheet-like recording medium S is discharged from the fixing device 9 to the stock tray 11.

  The basic operation of the image forming apparatus 1 is an image forming operation when a full-color image is formed on the sheet-like recording medium S. Any one of the process cartridges 10Y, 10M, 10C, and 10K is used. It may be used to form a single color image, or two or three process cartridges may be used to form a two or three color image.

  As described above, the image forming apparatus 1 according to the sixth embodiment of the present invention is the image forming apparatus 1 including the motor 131, and the motor 131 is the first to fourth of the present invention. Since any one of the motors 131, 131A, 131B, and 131C according to the embodiment, the workability of the assembly work of the motor 131 is improved, and the ease of assembly of the motor 131 at the time of manufacture can be improved. Further, the workability of the motor 131 removal work is improved, the time taken to remove the motor 131 can be shortened, and the repair time can be shortened.

(Seventh embodiment)
Next, a peripheral unit 2 of the image forming apparatus 1 according to the seventh embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 19 is a configuration diagram of the peripheral device 2 of the image forming apparatus 1 according to the seventh embodiment of the present invention. The same parts as those in the first to sixth embodiments described above are denoted by the same reference numerals and description thereof is omitted.

  A peripheral device (hereinafter referred to as “peripheral device”) 2 of an image forming apparatus 1 according to a seventh embodiment of the present invention has a sheet-like recording medium S as a document to be read in a fixed reading device section. The apparatus is applied to a read original processing apparatus (hereinafter referred to as “ADF”) that conveys and reads an image recorded on the sheet-like recording medium S while conveying the sheet-like recording medium S at a predetermined speed. It is.

  As shown in FIG. 19, a document conveying device 51 as a peripheral device 2 constituting the ADF is disposed on the image forming device 1 described above or an image forming device such as a copying machine or a multifunction peripheral (MFP). Yes.

  The document conveying device 51 separates the sheet-like recording medium S from the document setting unit 53 on which a sheet-like recording medium S bundle as a document to be read is set, and the sheet-like recording medium S bundle that has been set. A separating and feeding unit 55 that feeds the sheet-like recording medium S that has been fed temporarily, a movement for abutting and aligning the sheet-like recording medium S, and a resist unit 57 that pulls out and conveys the aligned sheet-like recording medium S are conveyed. A turn part 59 that turns the sheet-like recording medium S and conveys the original surface toward the reading side (downward), and a first reading and conveying part 61 that reads the surface image of the sheet-like recording medium S from below the contact glass; The second reading and conveying unit 63 that reads the front and back images of the sheet-like recording medium S after reading, the paper discharge unit 65 that discharges the sheet-like recording medium S that has been read front and back to the outside of the apparatus, and the discharged sheet shape Recording medium S A stack unit 67 for loading the holding, and a.

  The document setting unit 53 includes a document table 69 on which the sheet-like recording medium S bundle is placed, and a movable document table 71. In the document setting section 53, the document surface of the sheet-like recording medium S is set upward.

  The document table 69 is provided with a side guide (not shown) for adjusting the width direction of the sheet-like recording medium S bundle in a direction perpendicular to the transport direction, and document length detection sensors 79 and 81.

  As the document length detection sensors 79 and 81, a reflection type sensor or an actuator type sensor that can be detected even when only one sheet-like recording medium S is set is used. The length in the conveyance direction is determined. Document length detection sensors 79 and 81 are arranged so as to be able to determine at least whether the document size is vertical or horizontal.

  The movable document table 71 is provided so as to be movable up and down in the directions of arrows a and b by a bottom plate raising motor. Further, when the set document 75 and the set sensor 73 detect that the sheet-shaped recording medium S bundle is set on the movable document table 71, the movable document table 71 rotates the bottom plate forward motor to rotate the sheet. The movable document table 71 is raised so that the uppermost surface of the medium S bundle comes into contact with the pickup roller 83.

  The separation feeding unit 55 is for feeding only the uppermost sheet bundle of sheet-like recording media S on the document table 69, and several sheets (ideally, the sheet-like recording medium S bundle on the document table 69). Pickup roller 83 for picking up one sheet), a paper feed belt 87 driven in the paper feed direction, a reverse roller 89 driven to rotate in a direction opposite to the paper feed direction, and several fed sheets And an abutment sensor 91 that detects the tip of the recording medium S.

  The reverse roller 89 is in contact with the paper feed belt 87 at a predetermined pressure, and when it is in direct contact with the paper feed belt 87 or through the sheet-like recording medium S, the reverse roller 89 rotates. Therefore, when two or more sheet-like recording media S enter between the sheet feeding belt 87 and the reverse roller 89, the twisting force is set to be lower than the torque of the torque limiter. Has been. For this reason, the reverse roller 89 rotates clockwise, which is the original driving direction, and exerts a function of pushing back the excess sheet-like recording medium S, thereby preventing double feeding.

  When the abutting sensor 91 detects the leading edge of the sheet-like recording medium S that is separated and fed, the abutting sensor 91 conveys the sheet-like recording medium S by a predetermined distance from the detection time, and the sheet The sheet feeding belt 87 is stopped at a predetermined timing so that the recording medium S is brought into contact with the pull-out roller 93. For this reason, the sheet-like recording medium S is pressed against the pull-out roller 93 with a predetermined amount of bending.

  The pull-out roller 93 retracts the pickup roller 83 from the upper surface of the sheet-like recording medium S, and sends the sheet-like recording medium S only by the conveying force of the paper feeding belt 87, so that the leading end portion of the sheet-like recording medium S is In order to enter the nip between the upper and lower roller pairs of the pull-out roller 93 and perform alignment (skew correction) of the leading end portion, the skew-corrected sheet-like recording medium S is conveyed to the intermediate roller 97. Is for.

  The pull-out roller 93 is driven by a reverse rotation of a paper feed motor (not shown). When the paper feed motor is reverse, the pull-out roller 93 and the intermediate roller 97 are driven, but the pickup roller 83 and the paper feed belt 87 are driven. Not.

  A plurality of document width sensors 95 are arranged in the depth direction on the drawing and detect the size in the width direction perpendicular to the transport direction of the sheet-like recording medium S transported by the pull-out roller 93. Further, the length of the sheet-like recording medium S in the transport direction is detected by reading the leading edge and the trailing edge of the sheet-like recording medium S by the abutting sensor 91 described above.

  When the sheet-like recording medium S is conveyed from the registration unit 57 to the turn unit 59 by driving the pull-out roller 93 and the intermediate roller 97, the conveyance speed at the resist unit 57 is higher than the conveyance speed at the first reading conveyance unit 61. Is set at a high speed, and the processing time for feeding the sheet-like recording medium S to the reading unit is shortened.

  When the leading edge of the sheet-like recording medium S is detected by the reading inlet sensor 99, the document conveying speed is read and conveyed before the leading edge of the sheet-like recording medium S enters the nip between the upper and lower roller pairs of the reading inlet roller 101. At the same time as the deceleration is started to achieve the same speed as the speed, a reading motor (not shown) is driven to rotate forward to drive the reading entrance roller 101, the reading exit roller 109, and the contact image sensor (CIS) exit roller 111.

  When the registration sensor 103 detects the leading edge of the sheet-like recording medium S, it decelerates over a predetermined conveyance distance, temporarily stops at the reading position 108 where the first reading unit 105 is disposed, and an interface (not shown) is provided. A registration stop signal is transmitted to the control unit.

  When the reading start signal is received from the control unit, the sheet-like recording medium S that has stopped registration is accelerated so as to rise to a predetermined conveyance speed until the leading end of the sheet-like recording medium S reaches the reading position 108. Are transported. In addition, a gate signal indicating an effective image area in the sub-scanning direction on the first surface is sent to the first reading unit 105 at a timing when the leading end detected by a pulse count of a reading motor (not shown) reaches the reading unit. It is transmitted to the control unit until the rear end of S comes off.

  In the case of reading a single-side original sheet-like recording medium S, the sheet-like recording medium S that has passed through the first reading and conveying unit 61 is conveyed to the paper discharge unit 65 via the second reading unit 113. At this time, when the leading edge of the sheet-like recording medium S is detected by the paper discharge sensor 111, a paper discharge motor (not shown) is driven to rotate forward to rotate the paper discharge roller 119 counterclockwise.

  Further, immediately after the trailing edge of the sheet-like recording medium S comes out of the nip between the upper and lower roller pairs of the paper discharge roller 119 by the pulse count of the paper discharge motor from the detection of the leading edge of the sheet-like recording medium S by the paper discharge sensor 111 It is controlled such that the sheet-like recording medium S discharged onto the paper discharge tray 121 does not jump out by making the paper discharge motor drive speed illusionary.

  In the case of double-sided original reading, the sheet-shaped recording medium S is detected from the reading unit at the timing when the leading end reaches the second reading unit 113 by the pulse count of the reading motor after the discharge sensor 111 detects the leading end of the sheet-like recording medium S. Until the trailing edge of the recording medium S is removed, a gate signal indicating an effective image area in the sub-scanning direction is transmitted from the ADF control unit to the second reading unit 113 configured by a CCD line sensor.

  The surface of the second reading unit 113 is coated with a coating material having a soil decomposition function or a hydrophilic coating material on the reading surface of the sheet-like recording medium S. These coating materials are known ones. Can be used.

  As described above, the peripheral device 2 according to the seventh embodiment of the present invention is the peripheral device 2 connected to the image forming apparatus 1, and the peripheral device 2 includes the first peripheral device 2 according to the first embodiment of the present invention. Since any one of the motors 131, 131A, 131B, and 131C according to the fourth embodiment is provided, the workability of the work of assembling the motor 131 is improved, and the ease of assembling of the motor 131 at the time of manufacture is improved. Can be improved. Further, the workability of the motor 131 removal work is improved, the time taken to remove the motor 131 can be shortened, and the repair time can be shortened.

  Note that the peripheral device 2 is connected to the subsequent stage of the image forming apparatus 1, and is a sheet post-processing such as a bookbinding apparatus that performs saddle stitching after the sheet-like recording medium S is saddle-stitched, and a cutting apparatus that trims the sheet-like recording medium S Any device and mechanism that conveys the sheet-like recording medium S, that is, a device having a driving roller may be used.

  Further, the motors 131, 131A, 131B, and 131C of the above-described embodiments are so-called inner rotor motors in which the rotor is housed in the motor housings 157, 157A, 157B, and 157C, but the so-called outer that the outer rotor rotates. A rotor motor may be used. In such a case, the mounting member 159 (159A, 159B, 159C) described above is provided in the outer rotor motor.

1 Image forming apparatus 2 Peripheral machine (peripheral machine of image forming apparatus)
52 motor drive device 54 power transmission mechanism 131, 131A, 131B, 131C motor 152 control circuit (control means)
157, 157A, 157B, 157C Motor housing 157b Bottom 159, 159A, 159B, 159C Mounting member 159a Protruding part 160 Protruding part 161 First screw hole 163 First insertion hole 165 Second insertion hole 166 Third insertion hole 171 Motor fixing part 171a One surface 171b The other surface 173 First insertion hole 175 First screw member 175b Screw portion 176 Second screw member 176b Screw portion 177 Second screw hole 179 Opening portion 181 Receiving hole 183 First screw hole 185 First screw hole 187 Second insertion hole L Laser light S Sheet-like recording medium

JP 2008-8922 A Japanese Patent Laid-Open No. 5-47166

Claims (8)

In a motor having a motor housing for interpolating a rotor, and an attachment member fixed to the motor housing by being overlapped on the outside of the bottom of the motor housing,
When the mounting member is overlapped and fixed to the outside of the bottom portion of the motor housing, a protruding portion that protrudes from the bottom of the motor housing in a direction perpendicular to the motor housing is formed on the mounting member.
The mounting member is provided with a first screw hole to be screwed with a screw portion of the first screw member, and a second insertion hole into which the screw portion of the second screw member is inserted,
The first screw hole is communicated with a first insertion hole provided in the motor fixing portion;
The second insertion hole is communicated with a second screw hole provided in the motor fixing portion;
The second screw hole is screwed with a screw portion of the second screw member;
The thread portion of the first screw member is inserted into the first insertion hole,
The thread portion of the second screw member is inserted into the second insertion hole,
The bottom of the motor housing is provided with a receiving hole for receiving a tip portion of the screw portion of the first screw member,
The receiving hole is inserted through the first screw hole; and
The motor, wherein the second insertion hole is provided in the protruding portion. In a motor having a motor housing for interpolating a rotor, and an attachment member fixed to the motor housing so as to overlap the outside of the bottom of the motor housing,
The bottom of the motor housing is provided with a first screw hole that engages with the screw portion of the first screw member,
When the mounting member is overlapped and fixed to the outside of the bottom of the motor housing, a protruding portion that protrudes from the bottom of the motor housing in a direction perpendicular to the motor housing is formed on the mounting member.
The mounting member is provided with a first insertion hole through which the screw portion of the first screw member is inserted, and a third insertion hole through which the screw portion of the second screw member is inserted,
It said first insertion hole, communicates with each of the first threaded hole and a second insertion hole provided in the motors fixed part,
The third insertion hole communicates with a second screw hole provided in the motor fixing portion;
The thread portion of the first screw member is inserted into the second insertion hole,
The thread portion of the second screw member is inserted into the third insertion hole, and
The motor, wherein the third insertion hole is provided in the protruding portion. In a motor having a motor housing for interpolating a rotor, and an attachment member fixed to the motor housing by being overlapped on the outside of the bottom of the motor housing,
When the mounting member is overlapped and fixed to the outside of the bottom portion of the motor housing, a protruding portion that protrudes from the bottom of the motor housing in a direction perpendicular to the motor housing is formed on the mounting member.
The mounting member is provided with a first screw hole to be screwed with a screw portion of the first screw member, and a second insertion hole into which the screw portion of the second screw member is inserted,
The first screw hole communicates with a first insertion hole provided in the motor fixing portion,
It said second insertion hole is communicated with the second screw hole provided in the motor fixing part,
The thread portion of the first screw member is inserted into the first insertion hole,
The thread portion of the second screw member is inserted into the second insertion hole, and
Each of the said 1st screw hole and the said 2nd penetration hole is provided in the said protrusion part, The motor characterized by the above-mentioned. The motor according to any one of claims 1 to 3 , wherein the motor is an inner rotor type DC brushless motor with an encoder. The motor according to any one of claims 1 to 3 , wherein the motor is a stepping motor. A motor drive device comprising a motor, a power transmission mechanism for transmitting the drive force of the motor, and a control means for controlling the motor,
The motor drive device according to claim 1, wherein the motor is the motor according to claim 1. An image forming apparatus including a motor,
The image forming apparatus according to claim 1, wherein the motor is the motor according to claim 1. A peripheral device of an image forming apparatus,
A peripheral device for an image forming apparatus, wherein the peripheral device is provided with the motor according to any one of claims 1 to 5 .

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