JP2018045124A - Fastening member, fastening structure, fixation device and image formation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening member which can suppress breakage of a fastening member and a fastening object member fastened to the fastening member in comparison to a case where fastening is performed by using a screw, and also provide a fastening structure, a fixation device and an image formation apparatus.SOLUTION: A fastening member 130 includes: a shaft part 140; an operation part 132 which is connected to the shaft part 140 and has an operation part side contact surface 134 brought into contact with one fastening object member 170 on the shaft part 140 side; and a fastening part 150 which has a fastening part side contact surface 152 brought into contact with another fastening object member 180 on the shaft part 140 side. The fastening part 150 is rotated with rotation of the operation part 132 after the shaft part 140 is arranged in a state of penetrating the one fastening object member 170 and the other fastening object member 180. In the fastening member, fastening is performed by sandwiching the one fastening object member 170 and the other fastening object member 180 by the operation part side contact surface 134 and the fastening part side contact surface 152.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a fastening member, a fastening structure, a fixing device, and an image forming apparatus.

  As an invention relating to mounting of a fixing device or the like in an image forming apparatus, for example, Japanese Patent Application Laid-Open Publication No. 2003-228542 has a structure for preventing a screw from dropping from a unit for fastening a unit detachable from the apparatus main body to the main body. A part of which is bent into a loop shape and includes a wire for rotatably holding the screw around an axis thereof, and a fixing member for fixing the wire to the unit. A screw drop prevention structure is disclosed in which the screw is elastically supported by the fixing member via the wire when the screw is not made.

JP 2013-092234 A

  When a fastening member such as a screw is used for fixing the fixing device or the like, there is a problem that a screw hole groove for fastening the screw is crushed and the fastening member cannot be stopped.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fastening member, a fastening structure, a fixing device, and an image forming apparatus that can suppress breakage as compared with the case of fastening using screws.

  According to a first aspect of the present invention, there is provided an operating portion having an operating portion side contact surface that is connected to the shaft portion, and is connected to one of the fastened members on the shaft portion side, and the shaft. A fastening portion having a fastening portion side abutting surface that comes into contact with the other fastened member on the part side, and the shaft portion penetrates the one fastened member and the other fastened member After the operation portion is rotated, the fastening portion is rotated, and the operation portion side contact surface and the fastening portion side contact surface are connected to the one fastened member and the The fastening member is configured to be fastened by sandwiching the other fastened member.

  According to a second aspect of the present invention, the shaft portion is formed of a rod-like body protruding from the operation portion side contact surface side of the operation portion, and the fastening portion is in an axial direction of the shaft portion. The other fastening target is formed by a rod-like body extending in a direction perpendicular to the shaft portion so as to protrude from the shaft portion, and being rotated with respect to the insertion hole through which the fastening portion is inserted. It is a fastening member of Claim 1 contact | abutted with a member.

  The present invention according to claim 3 is the fastening member according to claim 1 or 2, wherein the fastening portion is chamfered at a corner portion of a fastening portion side abutting surface that abuts on the other fastened member. is there.

  The present invention according to claim 4 is characterized in that the fastening portion can be fitted into at least one hole portion formed on a side surface of the other fastening member on the fastening portion side contact surface. The fastening member according to any one of claims 1 to 3, wherein a portion is formed.

  According to a fifth aspect of the present invention, at least one hole in which the fastening portion can be fitted into at least one protrusion formed on a side surface of the other fastening member on the fastening portion side contact surface. The fastening member according to any one of claims 1 to 3, wherein a portion is formed.

  The present invention according to claim 6 is the fastening member according to any one of claims 1 to 3, wherein the fastening portion is formed with at least one convex portion that presses the fastening portion side contact surface.

  The present invention according to claim 7 is characterized in that the fastening portion can be fitted into at least one hole formed on a side surface of the other fastened member on the fastening portion side contact surface. And at least one convex portion that presses the fastening portion side contact surface, and the protrusion has a height higher from the fastening portion side contact surface than the convex portion. The fastening member according to any one of 1 to 3.

  According to the eighth aspect of the present invention, the one fastened member, the other fastened member, the shaft portion, and the shaft portion, which is connected by the shaft portion, are brought into contact with the one fastened member. A fastening member having an operation part having an operation part side contact surface and a fastening part having a fastening part side contact surface that comes into contact with the other fastened member on the shaft side. The fastening member is inserted into an insertion hole through which the fastening portion formed in the one fastened member and the other fastened member can be inserted, and the shaft portion is inserted into the one fastened member and the After being arranged in a state of being penetrated through the other fastened member, the operation part is rotated, so that the fastening part is rotated, and the operation part side contact surface and the fastening part side contact surface, Fastening that is configured to be fastened by sandwiching the one fastened member and the other fastened member It is an elephant.

  According to a ninth aspect of the present invention, the other fastening member on the fastening member side is formed with a restricting portion for stopping the rotation of the fastening portion of the fastening member at a fastening position. The fastening structure described in 1.

  In the tenth aspect of the present invention, the other fastening member on the side of the fastening member is formed with a preventing portion that prevents the fastening member from rotating in the direction opposite to the correct rotational direction for fastening. The fastening structure according to claim 7 or 8.

  According to the eleventh aspect of the present invention, there is provided a pressurizing portion, a heating portion provided to face the pressurizing portion, and at least one fastened member fastened to the other fastened member by a fastening member. The fastening member is connected to the shaft portion by the shaft portion, and has an operation portion side contact surface on the shaft portion side to be in contact with the one fastened member; A fastening portion having a fastening portion side abutting surface abutted with the other fastening member on the shaft side, and the fastening member includes the one fastening member and the other fastening member. After the fastening portion formed in each is inserted into an insertion hole through which the fastening portion can be inserted and the shaft portion is disposed in a state of passing through the one fastening member and the other fastening member, the operation portion Is rotated, the fastening part is rotated, and the operation part side contact surface and the fastening part side contact surface are Wherein the structure and fuser device which is fastened by sandwiching one of the other of the fastening member and the fastened member.

  According to a twelfth aspect of the present invention, an image forming apparatus main body, an image holding body for holding an image, a pressurizing unit, a heating unit provided facing the pressurizing unit, and a fastening member are used to form the image. A fixing device having at least one fastened member fastened to the other fastened member of the apparatus main body, and the fastening member is connected to the shaft portion by the shaft portion, An operation portion having an operation portion side contact surface that comes into contact with the one fastened member on the shaft portion side, and a fastening portion side contact surface that comes into contact with the other fastened member on the shaft portion side. And the fastening member is inserted into an insertion hole through which the fastening portion formed in the one fastened member and the other fastened member can be inserted, and the shaft portion is After the one to-be-fastened member and the other to-be-fastened member are disposed in a penetrating manner, The fastening part is rotated by rotating the part, and the operation part side contact surface and the fastening part side contact surface are fastened by sandwiching the one fastened member and the other fastened member. An image forming apparatus configured as described above.

  According to the first aspect of the present invention, it is possible to suppress damage to the fastening member as compared with the case of fastening using a screw.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it can be formed with a simple structure as compared with the case where the fastening portion has a shape other than the rod-shaped body.

  According to the third aspect of the present invention, in addition to the effect of the present invention according to the first or second aspect, it is easier to rotate the fastening portion than when the corner portion of the fastening portion side contact surface is not chamfered. Become.

  According to the fourth aspect of the present invention, in addition to the effect of the present invention according to any one of the first to third aspects, the fastening portion can be stopped at the fastening position.

  According to the fifth aspect of the present invention, in addition to the effect of the present invention according to any one of the first to third aspects, the fastening portion can be stopped at the fastening position.

  According to the sixth aspect of the present invention, in addition to the effect of the present invention according to any one of the first to third aspects, it is possible to eliminate a gap in which the fastening member is fastened and to suppress rattling.

  According to the seventh aspect of the present invention, in addition to the effect of the present invention according to any one of the first to third aspects, the height of the protrusion from the fastening portion side contact surface is lower than that of the convex portion. Compared to the case, the fastening portion can be stopped at the fastening position, and a gap in which the fastening member is fastened can be eliminated and rattling can be suppressed.

  According to the eighth aspect of the present invention, it is possible to provide a fastening structure that can suppress damage to the fastening member and the fastened member to which the fastening member is fastened, as compared to the case of fastening using a screw.

  According to the present invention of claim 9, in addition to the effect of the present invention of claim 8, the fastening portion can be stopped at a predetermined fixing position.

  According to the present invention of claim 10, in addition to the effect of the present invention of claim 8 or 9, the fastening portion can be rotated in the correct direction.

  According to the eleventh aspect of the present invention, it is possible to provide a fixing device capable of suppressing breakage of a fastening member and a member to be fastened to which the fastening member is fastened, as compared with the case of fastening using a screw.

  According to the twelfth aspect of the present invention, it is possible to provide an image forming apparatus capable of suppressing damage to a fastening member and a member to be fastened to which the fastening member is fastened, as compared with the case of fastening using a screw.

1 is a side sectional view showing an image forming apparatus according to an embodiment. FIG. 3 is a side cross-sectional view illustrating the fixing device according to the embodiment. FIG. 2 is a perspective view illustrating the fixing device housed in the image forming apparatus main body according to the embodiment and fastened by a fastening member. 4A is a perspective view illustrating a state in which the fixing device is removed from the image forming apparatus main body according to the embodiment, and FIG. 4B is a perspective view illustrating a state before the fixing device is fastened in the image forming apparatus main body. It is a perspective view which shows the fastening structure which concerns on embodiment, FIG. 5A is a perspective view which shows the state before fastening, FIG. 5B is the perspective view which looked at the state after fastening from one side, FIG. 5C is FIG. It is the perspective view which looked at the state from the other. 6A is a perspective view of the fastening member of the embodiment, FIG. 6B is a front view, FIG. 6C is a side view seen from one side, and FIG. 6D is a front view of the fastening member in a state rotated to the fastening position. FIG. 6E is a side view seen from one side. FIG. 7A is a cross-sectional view showing a state before fastening, and FIG. 7B is a cross-sectional view showing a state in which a fastening member is inserted into a fastened member. 7C is a front view seen from the fastening portion side, FIG. 7D is a cross-sectional view showing a state where the fastening member is fastened to the fastened member, and FIG. 7E is a front view seen from the fastening portion side. 8A is a perspective view showing a fastening member of Modification 1, FIG. 8B is a cross-sectional view showing a state in which the fastening member is inserted into the fastened member, and FIG. 8C is an enlarged view of a VIIIC portion of FIG. 8B. FIG. 8D is a perspective view showing another modification. FIG. 9A is a perspective view showing a fastening member of Modification Example 2, and FIG. 9B is a front view showing a second fastened member of Modification Example 2. FIG. 10A is a cross-sectional view showing a state in which the fastening member of Modification 2 is inserted into the fastened member, and FIG. 10B is a cross-sectional view showing a state in which the fastening member is fastened to the fastened member. FIG. 11A is a perspective view showing a fastening member of Modification 3 and FIG. 11B is a front view showing a second fastened member of Modification 3. FIG. 12A is a cross-sectional view showing a state in which the fastening member of Modification 3 is inserted into the fastened member, and FIG. 12B is a cross-sectional view showing a state in which the fastening member is fastened to the fastened member. 13A is a perspective view showing a fastening member according to Modification 4, FIG. 13B is a cross-sectional view showing a state in which the fastening member is fastened to the fastened member, and FIG. 13C is an enlarged view of the XIIIC portion of FIG. 13B. . 14A is a front view showing a second fastened member of Modification 5, FIG. 14B is a front view showing a state in which the fastening member is fastened, and FIG. 14C is a state in which the fastening member is fastened to the fastened member. FIG. 15A is a perspective view showing a fastening member according to Modification 6. FIG. 15B is a cross-sectional view showing a state in which the fastening member is fastened to the fastened member. FIG. 15C is an enlarged view of the XVC portion of FIG. 15B. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a fastening member, a fastening structure, a fixing device, and an image forming apparatus for embodying the technical idea of the present invention, and is intended to specify the present invention. And is equally applicable to other embodiments within the scope of the claims.

[Embodiment]
First, an image forming apparatus 10 according to an embodiment will be described with reference to FIG. As shown in FIG. 1, the image forming apparatus 10 according to the embodiment includes an image forming apparatus main body 12, and supplies a recording medium 104 such as recording paper as a transfer material into the image forming apparatus main body 12. A recording medium supply device 18, an image forming unit 14 that forms an image to be transferred to the recording medium 104, and a fixing device 36 are mounted, and a discharge unit 16 that discharges the recording medium 104 is provided above the image forming apparatus main body 12. And a conveyance path 56 for conveying the recording medium 104 so as to pass through these. In the embodiment, the fixing device 36 is detachably attached to the image forming apparatus main body 12, and the image forming apparatus main body 12 and the fixing device 36 are fastened using a fastening member 130. A structure 120 is provided (see FIGS. 3 and 5). Each configuration will be described below.

  The recording medium supply device 18 extracts the recording medium storage container 50 that stores the recording media 104 in a stacked state, and the uppermost recording medium 104 stored in the recording medium storage container 50, and extracts the extracted recording medium 104. A conveyance roll 52 that conveys toward the image forming unit 14 and a retard roll 54 that rolls the recording medium 104 and prevents a plurality of recording media 104 from being conveyed in an overlapping state on the image forming unit 14 are provided. ing.

  The image forming unit 14 includes, for example, a process cartridge 20 corresponding to four colors of yellow (Y), magenta (M), cyan (C), and black (K), an optical writing device 22, and a transfer device 24. Has been. The process cartridge 20 and these components have the same configuration except for the color of the image to be formed.

  Each of the process cartridges 20 is used as an exchange member and is detachably provided to the image forming apparatus main body 12. For example, Y, M are sequentially arranged from the rear side (right side in FIG. 1) of the image forming apparatus main body 12. , C, K in this order.

  The process cartridge 20 is of an electrophotographic type that forms a color image, for example. Each of the process cartridges 20 includes a process cartridge main body 26. A drum-shaped image holding body 28 for holding a developer image and a charging roll for uniformly charging the image holding body 28 are provided in the process cartridge main body 26. For example, the charging device 30 as charging means, the developing device 32 for developing the latent image written on the image holding body 28 with a developer (toner), and the waste developer remaining on the image holding body 28 are scraped off, for example. A cleaning device 34 for cleaning is provided.

  The developing device 32 develops the latent image formed on the corresponding image carrier 28 using Y, M, C, and K developers stored therein.

  The optical writing device 22 is used as a latent image forming device, and is formed of, for example, a scanning type laser exposure device, and forms a latent image on each surface of the image carrier 28. The optical writing device 22 may use an LED, a surface emitting laser, or the like as another embodiment.

  The transfer device 24 includes a transfer member 38 used as a transfer member, a primary transfer roll 40 used as a primary transfer device, a secondary transfer roll 42 used as a secondary transfer device, and a cleaning device 44. ing.

  The transferred member 38 has an endless belt shape, for example, and is supported by five support rolls 46a, 46b, 46c, 46d, and 46e so as to be able to rotate in the direction indicated by the arrow in FIG. In addition, at least one of the support rolls 46a, 46b, 46c, 46d, and 46e is connected to a power source (illustrated) such as a motor, and is rotated by receiving a drive transmission from the power source. The transfer member 38 is driven to rotate.

  The support roll 46a is disposed so as to face the secondary transfer roll 42, and functions as a backup roll of the secondary transfer roll 42. A portion sandwiched between the secondary transfer roll 42 and the support roll 46a is a secondary transfer position. It has become.

  The primary transfer roll 40 transfers the developer image formed on the surface of the image holding member 28 by the corresponding developing device 32 to the member to be transferred 38.

  Further, the secondary transfer roll 42 transfers the Y, M, C, and K developer images transferred to the transfer target member 38 to the recording medium 104.

  The cleaning device 44 has a scraping member 48 that scrapes off the developer of each color remaining on the surface of the transferred member 38 after the developer image of each color is transferred to the recording medium 104 by the secondary transfer roll 42. . Then, the developer scraped off by the scraping member 48 is collected in the main body of the cleaning device 44.

  The conveyance path 56 includes a main conveyance path 56a and a reverse conveyance path 56b.

  The main conveyance path 56 a conveys the recording medium 104 supplied from the recording medium supply device 18 to the image forming unit 14 and discharges the recording medium 104 on which the image is formed to the discharge unit 16. In the main conveyance path 56a, a conveyance roll 52, a retard roll 54, a registration roll 58, a transfer device 24, a fixing device 36, and a discharge roll 60 are arranged in this order from the upstream side in the conveyance direction of the recording medium 104.

  The registration roll 58 temporarily stops the leading end portion of the recording medium 104 conveyed from the recording medium supply device 18 side, and sends the recording medium 104 toward the transfer device 24 so as to coincide with the image formation timing. .

  The fixing device 36 includes a pressure unit 70 and a heating unit 80 that faces the pressure unit 70. The recording medium 104 passing between the pressure unit 70 and the heating unit 80 is heated and pressurized to fix the developer image on the recording medium 104. The details of the fixing device 36 will be described later.

  The discharge roll 60 discharges the recording medium 104 on which the developer is fixed by the fixing device 36 to the discharge unit 16.

  The reverse conveyance path 56b is a conveyance path that reversely feeds the recording medium 104 having the developer image formed on one surface thereof to the image forming unit 14, and includes, for example, a reverse conveyance path 56b. Two reverse conveying rolls 62a and 62b are arranged.

  The recording medium 104 is transported from the main transport path 56 a to the discharge roll 60, and the discharge roll 60 rotates in the reverse direction with the rear end portion of the recording medium 104 being sandwiched between the discharge rolls 60. It is supplied to the reverse conveyance path 56b. The recording medium 104 supplied to the reverse conveyance path 56b is conveyed to a position upstream of the registration roll 58 by the reverse conveyance rolls 62a and 62b.

  Next, the fixing device 36 of the embodiment will be described. As illustrated in FIG. 2, the fixing device 36 includes a pressure unit 70 and a heating unit 80 that faces the pressure unit 70. The heating unit 80 includes an induction heater (hereinafter referred to as an IH (induction heating) heater) 82 and a heating member 88 heated by the IH heater 82.

  The pressurizing unit 70 has a cylindrical roll unit 72, is provided so as to face the heating member 88, is pressed against the outer surface of the heating member 88, and rotates in the direction of arrow A in FIG. Then, the pressing region 102 is formed in a state where the heating member 88 is sandwiched between the pressing unit 70 and the pressing member 92, and a recording medium holding an unfixed developer image is passed through the pressing region 102, thereby And pressure is applied to fix the unfixed developer image on the recording medium.

  The roll portion 72 includes a core 74 made of a metal material such as iron, stainless steel, and aluminum, an elastic layer 76 covering the core 74, and a release layer 78 coated or applied on the elastic layer 76. It is a soft roll. The release layer 78 is made of an insulating material having excellent release properties, such as PFA.

  The heating member 88 of the heating unit 80 is an endless strip having a cylindrical outer shape, and has a multilayer structure, for example. In addition, for example, a circular support member 89 that supports the heating member 88 is provided at both ends in the longitudinal direction of the heating member 88, and the heating member gear that rotates the heating member 88 is provided on the support member 89. (Not shown) is provided, and one side of the heating member gear is connected to driving means (not shown) such as a motor in the image forming apparatus main body 12.

  Inside the heating member 88 of the heating unit 80, a temperature-sensitive magnetic body 90 is provided on the IH heater 82 side with a gap from the heating member 88. A shielding member 98 that shields the magnetic force leaking from the temperature-sensitive magnetic body 90 is disposed inside the temperature-sensitive magnetic body 90. The shielding member 98 is made of, for example, aluminum. In addition, a holding body 100 is provided inside the heating member 88, and a pressing member 92 is provided at a position facing the pressing portion 70 of the holding body 100.

  Further, a frame 94 is provided between the shielding member 98 and the pressing member 92 to support the temperature-sensitive magnetic body 90, the shielding member 98, and the holding body 100 provided with the pressing member 92. Further, a temperature sensor 96 that measures the temperature of the heating member 88 is provided on the inner surface of the heating member 88. The heating member 88 itself may also have a magnetic layer and may be directly heated by induction.

  The IH heater 82 includes a coil 84 for induction heating and a magnetic body 86 on the opposite side of the coil 84 from the heating member 88. When the coil 84 is energized, a magnetic field is formed, and the heating member 88 and the temperature-sensitive magnetic body 90 generate heat. The heating member 88 is rotated in the direction of arrow C, and the developer image on the paper conveyed in the direction of arrow B is heated (see FIG. 2).

  The pressing member 92 is formed of, for example, a resin material such as silicone rubber, and is provided in contact with the inner surface of the heating member 88 at a position facing the pressure unit 70 with the heating member 88 interposed therebetween.

  The pressing member 92 of the heating unit 80 is in pressure contact with the pressing unit 70 to form a pressing region 102, and the developer image is fixed on the recording medium 104 by the pressing region 102.

  In the image forming apparatus according to the embodiment, the case where the heating unit uses the IH heater has been described. However, the present invention is not limited to this, and a lamp heater may be used.

  An inlet chute 106 is provided on the upstream side of the pressing region 102. The recording medium 104 conveyed in the direction of arrow B is guided to the inlet chute 106, and the leading end of the recording medium 104 is guided to the pressing area 102 (see FIG. 2). An outlet chute 108 is provided on the downstream side of the pressing region 102. Note that the peeling member 110 is disposed in the fixing device 36 so as to maintain a predetermined distance from the surface of the heating member 88.

  The fixing device 36 of the embodiment is provided so as to be detachable from the image forming apparatus main body 12 (see FIGS. 3 and 4). In other words, the fixing device 36 is provided with a pair of first fastened members 170 as one fastened member as a member to be mounted in the image forming apparatus main body 12 below both ends of the fixing device 36. Further, the image forming apparatus main body 12 is provided with a second fastened member 180 as the other fastened member to which the fixing device 36 is attached. The fixing device 36 is attached to and detached from the image forming apparatus main body 12 leaving the IH heater 82 (see FIG. 4A).

  A hooking portion (not shown) that can be hooked in the image forming apparatus main body 12 is provided above the fixing device 36. Then, the fixing device 36 hooks the upper hooking portion of the fixing device 36 into the image forming apparatus main body 12, and the lower first fastening member 170 and the second fastening member 130 of the image forming apparatus main body 12 are fastening members. By being fastened by 130, the image forming apparatus main body 12 is attached. At this time, the 1st to-be-fastened member 170, the 2nd fastening member 130, and the fastening member 130 come to comprise the fastening structure 120 of embodiment.

  Next, the fastening structure 120 of the embodiment will be described with reference to FIGS. In the fastening structure 120 of the embodiment, a first fastened member 170 included in the fixing device 36 and a second fastened member 180 provided in the image forming apparatus main body 12 are configured by a fastening member 130 (FIG. 3). To FIG. 5).

  First, the fastening member 130 of the embodiment will be described mainly with reference to FIG. The fastening member 130 is a member for fastening a plurality of, for example, two first to-be-fastened members 170 and second to-be-fastened members 180 when operated by an operator. In the embodiment, as the operation of the fastening member 130, the first fastened member 170 and the second fastened member 180 can be fastened by rotating the fastening member 130 by a predetermined angle (see FIG. 5). ). The first fastened member 170 and the second fastened member 180 may be collectively referred to as the fastened members 170 and 180.

  As shown in FIG. 6, the fastening member 130 includes an operation unit 132 that is operated by an operator, a shaft unit 140 that extends from one of the operation units 132, and an operation unit of the shaft unit 140. The fastening part 150 is formed on the opposite side of the fastening part 150, and the fastening part 150 connected to the shaft part 140 is rotated by rotating the operation part 132.

  The operation unit 132 is formed in a columnar shape having a certain size diameter and length, and is a portion where an operator performs operations such as rotation by picking, for example. In the embodiment, the operation unit 132 is provided with a knob 136 in which a plurality of projections and recesses are alternately formed along the axial direction of the operation unit 132 on the outer periphery of the columnar operation unit 132 so that the operation can be easily performed. It is formed to become. Moreover, the operation part 132 is formed so that it may become a diameter larger than the diameter of the axial part mentioned later. The surface of the operation portion 132 on the side where the shaft portion 140 extends is an operation portion side contact surface 134 for contacting and supporting a first fastened member 170 described later. The operation unit 132 is not limited to this shape, and various shapes can be applied as long as the operation unit 132 can be rotated.

  The shaft portion 140 is formed as a rod-like body that is thinner than the diameter of the operation portion 132, and extends from the central portion of the operation portion 132. The shaft portion 140 is a portion that is arranged in a state of being inserted through the fastened members 170 and 180. In addition, the length of the shaft portion 140 is formed such that all of the fastening portions 150 to be described later are penetrated and protruded through the fastened members 170 and 180 to be fastened. The shaft portion 140 is not limited to a cylindrical shape, and may be formed in other shapes, such as a polygonal column shape.

  The fastening portion 150 is formed on the opposite side of the operation portion 132 of the shaft portion 140, is a rod-like body provided in a direction orthogonal to the axial direction of the shaft portion 140, and is symmetric with respect to the shaft portion 140. In this way, it is formed extending from the shaft portion 140. That is, the fastening portion 150 is provided with the shaft portion 140 substantially at the center. In addition, the fastening part 150 of embodiment is a rectangular parallelepiped provided so that a plane may be arrange | positioned at the operation part 132 side. A flat surface on the shaft portion 140 side of the fastening portion 150 is a fastening portion side abutting surface 152 that abuts and supports a second fastening member described later. The fastening portion 150 is formed so as to be larger than the diameter of the shaft portion 140.

  The fastening member 130 according to the embodiment includes an operation portion side contact surface 134 provided on the shaft portion 140 side of the operation portion 132 and a fastening portion side contact surface 152 provided on the shaft portion 140 side of the fastening portion 150. As a result, the fastened members 170 and 180 are fastened by the fastening member 130.

  In addition, as for the fastening member 130, the operation part 132 is formed with the resin material, for example, and the axial part 140 and the fastening part 150 are formed with the metal material.

  Next, the first fastening member 170 of the fixing device 36 and the second fastening member 130 of the image forming apparatus main body 12 will be described with reference to FIGS. 4, 5, and 7. A first insertion hole 172 and a second insertion hole 182 through which the fastening portion 150 of the fastening member 130 is inserted are respectively formed in the first fastening member 170 of the fixing device 36 and the second fastening member 180 of the image forming apparatus main body 12. Is formed. The first insertion hole 172 and the second insertion hole 182 have shapes that allow the fastening portion 150 of the fastening member 130 of the embodiment to be inserted, that is, rectangular holes. At this time, since the first insertion hole 172 and the second insertion hole 182 are also portions where the shaft portion 140 is disposed, the first insertion hole 172 and the second insertion hole 182 are formed with a size that allows the shaft portion 140 to be inserted. In addition, since the axial part 140 of the fastening member 130 of embodiment is formed small compared with the fastening part 150, the 1st insertion hole 172 and the 2nd insertion hole 182 are formed in a rectangular parallelepiped shape.

  Next, with reference to FIGS. 3, 4, and 7, fastening of the fastened members 170 and 180 by the fastening member 130 will be described. First, as shown in FIGS. 4B and 7A, first, the upper hooking portion of the fixing device 36 is hooked, and then the lower first fastening member 170 is attached to the second fastening member 180 of the image forming apparatus main body 12. Match. At this time, the position of the first insertion hole 172 of the first fastened member 170 and the second insertion hole 182 of the second fastened member 180 are combined.

  Next, as shown in FIGS. 7B and 7C, the fastening portion 150 of the fastening member 130 is inserted from the first insertion hole 172 of the first fastened member 170. By this insertion, the operation portion side contact surface 134 on the shaft portion 140 side of the operation portion 132 is brought into contact with the first side surface 174 on the outer side of the first fastened member 170, and the fastening portion 150 of the second fastened member 180. It protrudes from the second insertion hole 182. At this time, since the length of the shaft portion 140 is formed so as to penetrate the first fastened member 170 and the second fastened member 180, the fastening portion side abutment on the shaft portion 140 side of the fastening portion 150 The surface 152 is disposed at substantially the same position as the second side surface 184 outside the second fastened member 180.

  Thereafter, as shown in FIGS. 7D and 7E, by rotating the operation portion 132 in one direction, the fastening portion 150 is rotated together with the shaft portion 140, and the fastening portion 150 is the second insertion hole 182 of the second fastened member 180. The fastening part-side contact surface 152 of the fastening part 150 is brought into contact with and supported by the second side surface 184 on the outer side of the second fastened member 180.

  At this time, in the embodiment, the first insertion hole 172 and the second insertion hole 182 are formed in a rectangular shape, and the fastening portion 150 of the fastening member 130 is formed in a straight rectangular parallelepiped with the shaft portion 140 interposed therebetween. It stops at a position rotated approximately 90 ° with respect to the second insertion hole. By doing in this way, it becomes a position substantially orthogonal to the 2nd penetration hole 182, and it becomes possible to support a part with high intensity farthest from the opened part.

  Thus, the fastening of the fastened members 170 and 180 by the fastening member 130 is completed.

  The fastening is released by rotating the operation part 132 of the fastening member 130 so that the fastening part 150 and the second insertion hole 182 coincide with each other, and then pulling out the fastening member 130.

  By adopting such a configuration, the fastening by the fastening member 130 of the embodiment is suppressed from damaging the fastening member and each fastening member as compared with the case of using a conventional screw.

  In addition, in the fastening member 130 of the embodiment, the case where the fastening portion 150 is formed by a rectangular parallelepiped rod was shown, but the configuration of the fastening portion 150 of the fastening member 130 and each fastening member 170, 180 is not limited thereto. It may be changed. Hereinafter, modifications of the embodiment will be described.

[Modification 1]
As shown in FIGS. 8A to 8C, the fastening member 130 </ b> A according to the first modification of the embodiment is formed by chamfering the corners of the fastening portion side contact surface 152 </ b> A of the fastening portion 150 </ b> A of the fastening member 130 </ b> A and forming a taper 154. Yes.

  With such a configuration, in the fastening structure 120A of the first modification, the second insertion hole 182 is opened when rotated from the state of protruding from the second insertion hole 182 of the second fastened member 180. After the taper 154 is brought into contact with the corner, the corner of the second insertion hole 182 can be passed along the angle of the chamfered taper 154, so that the fastening member 130A can be smoothly rotated. become able to.

  Note that, as in the fastening member 130A ′ shown in FIG. 8D, the taper 154 ′ may be formed only on the rotational direction side of the fastening portion 150A ′.

[Modification 2]
In addition, as shown in FIG. 9A, the fastening member 130B of Modification 2 has at least one fastening portion side contact surface 152B of the fastening portion 150B, and in Modification 2 a pair of protrusions 156 are formed. Furthermore, as shown in FIG. 9B, a pair of positions facing each other across the second insertion hole 182 is formed on the second side surface 184B on the outer side of the second fastened member 180B on which the fastening portion 150B of the fastening member 130B is supported. A hole 186 is formed.

  And in the fastening structure 120B of the modified example 2, as shown in FIG. 10, when fastening the fastening member 130B to each fastening member 170, 180B, the pair of protrusions 156 of the fastening portion 150B of the fastening member 130B are: By fitting into the pair of holes 186 formed in the second fastened member 180B, sound and vibration are generated, so that the operator can be notified that the fastening has been completed.

  By setting it as such a structure, in the fastening structure 120B of the modification 2, the fastening member 130B can be arrange | positioned correctly in a fastening position.

[Modification 3]
In addition, as shown in FIG. 11A, the fastening member 130 </ b> C of Modification 3 is at least one on the fastening portion side contact surface 152 </ b> C of the fastening portion 150 </ b> C, as opposed to the fastening member 130 </ b> B of Modification 2. A pair of holes 157 are formed. Further, as shown in FIG. 11B, the second side surface 184C outside the second fastened member 180C on which the fastening portion 150C of the fastening member 130C of the third modified example is supported is shown in FIG. 11B. A pair of protrusions 188 are formed at positions facing each other across the second insertion hole 182, opposite to the outer second side surface 184 </ b> B.

  And in the fastening structure 120C of the modification 3, as shown in FIG. 12, when fastening the fastening member 130C to each fastening member 170, 180C, the pair of hole portions 157 of the fastening portion 150C of the fastening member 130C, By fitting the pair of protrusions 188 formed on the second fastened member 180C, sound and vibration are generated, so that the operator can be notified that the fastening has been completed.

  By setting it as such a structure, in the fastening structure 120C of the modification 3, the fastening member 130C can be correctly arrange | positioned in a fastening position.

[Modification 4]
Further, as shown in FIG. 13, the fastening member 130 </ b> D of Modification 4 is formed with at least one part of the fastening portion side contact surface 152 </ b> D of the fastening portion 150 </ b> D, and in Modification 4 a pair of convex portions 158 is formed. Has been. In addition, since the pair of convex portions 158 are formed on the fastening portion 150D of the fastening member 130D, in the fastening structure 120D of Modification 4, when the fastening member 130D is fastened to each of the fastened members 170 and 180, fastening is performed. The pair of convex portions 158 of the member 130D are pressed against the second side surface 184 on the outer side of the second fastened member 180 (see FIG. 13C).

  Therefore, in the fastening structure 120D of Modification 4, the gap between the operation portion side contact surface 134 of the fastening member 130D and the first fastened member 170, the gap between the first fastened member 170 and the second fastened member 180, And the clearance gap between the 2nd to-be-fastened member 180 and the fastening part 150 of the fastening member 130 is no longer formed, and each rattling comes to be suppressed.

[Modification 5]
Moreover, in the fastening structure 120E of the modification 5, as shown in FIG. 14, the control part protruded by the 2nd side surface 184E of the outer side of the 2nd to-be-fastened member 180E by which the fastening part 150 of the fastening member 130 is arrange | positioned. The regulation protrusion 160 is formed. The restricting protrusion 160 is formed at a position where the fastening portion 150 of the fastening member 130 is brought into contact when the fastening portion 150 is rotated to the fastening position, and stops the fastening portion 150 at the fastening position, so that the fastening member 130 is moved from the fastening position. It is what regulates rotating. By forming the regulation protrusion 160, the fastening portion 150 of the fastening member 130 can be accurately arranged at the fastening position.

  The restricting protrusion 160 can be formed in a shape that can restrict the rotation of the fastening member 130, for example, a rod-like body or a protrusion.

  Moreover, the reverse rotation prevention part 162 as a prevention part which prevents the fastening member 130 from rotating in the opposite direction at the time of fastening can also be formed. The reverse rotation preventing portion 162 can also be formed in a shape that can prevent the fastening member 130 from rotating, for example, a rod-like body or a protrusion.

[Modification 6]
In addition, the structure of the said embodiment and the modifications 1-5 can also be used in combination, respectively. For example, the fastening member 130F of Modification 6 is configured by combining Modifications 2 and 4, and as shown in FIG. 15, a pair of fastening members 130F on the fastening part side contact surface 152F of the fastening part 150F of the fastening member 130F. The protrusion 156 and the pair of protrusions 158 are formed, and the pair of holes 186 are formed on the second side surface 184F outside the second fastened member 180F.

  With such a configuration, in the fastening structure 120F of Modification 6, the pair of protrusions 156 formed on the fastening portion 150F of the fastening member 130F is formed on the second side surface 184F outside the second fastened member 180F. By fitting into the pair of holes 186, it is possible to notify the operator of the completion of the fastening by sound or vibration, and the pair of convex portions 158 formed on the fastening portion 150 are outside the second fastened member 180. By pressing the second side surface 184, each gap is eliminated, and rattling can be suppressed. In particular, in the fastening structure 120F of the modified example 6, the gap formed when the pair of protrusions 156 of the fastening member 130F are fitted into the pair of holes 186 of the second fastened member 180F can be eliminated. .

  In the case of the fastening structure 120F of Modification 6, the pair of convex portions 158 are formed so that the height from the fastening portion side contact surface 152 is lower than the pair of protrusions 156. In this way, after the pair of protrusions 156 are fitted into the pair of holes 186, the second fastened member 180F can be pressed by the pair of protrusions 158 (see FIG. 15C). .

  In addition, since the structure other than a fastening part is common in embodiment, the fastening member of each said modification 1-6 attaches | subjects the same code | symbol to a common structure, and abbreviate | omits detailed description.

  In the embodiments, the fastening structure using the fastening member has been described as a representative case where the fixing device is attached to the image forming apparatus. However, the fastening structure is not limited to this, and a structure in which a plurality of fastened members are fastened by the fastening member. It can be applied to.

  Further, in the embodiment, the case where the first fastening member and the second fastening member are fastened by the fastening member has been described. However, the present invention is not limited to this, and the length of the shaft portion of the fastening member is adjusted. By forming an insertion hole through which a fastening portion is inserted into another fastening member sandwiched between the first fastening member and the second fastening member, it is possible to fasten three or more fastening members.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 12 Image forming apparatus main body 14 Image forming means 24 Transfer apparatus 28 Image holding body 36 Fixing apparatus 70 Pressure part 80 Heating part 120, 120A-120F Fastening structure 130, 130A-130D, 130F Fastening member 132 Operation part 134 Operation part side contact surface 136 Knob part 140 Shaft part 150, 150A-150D, 150F Fastening part 152, 152A-152D, 152F Fastening part side contact surface 154 Taper 156 Protrusion part 158 Convex part 160 Restriction protrusion (regulation part)
162 Reverse rotation prevention part (prevention part)
170 First fastened member (one fastened member)
172 1st insertion hole 174 1st side surface 180, 180B, 180C, 180E, 180F 2nd to-be-fastened member (other to-be-fastened member)
182 Second insertion hole 184, 184B, 184C, 184E, 184F Second side surface 186 Hole

Claims (12)

The shaft,
Connected by the shaft,
An operation portion having an operation portion side contact surface that is in contact with one of the fastened members on the shaft portion side;
A fastening portion having a fastening portion side abutting surface to be brought into contact with the other fastened member on the shaft portion side,
After the shaft portion is disposed in a state of passing through the one fastened member and the other fastened member, the fastening portion is rotated by rotating the operating portion, and the operating portion side A fastening member configured such that the contact surface and the fastening portion side contact surface are fastened by sandwiching the one fastened member and the other fastened member. The shaft portion is formed of a rod-like body protruding from the operation portion side contact surface side of the operation portion,
The fastening part is a direction perpendicular to the axial direction of the shaft part, and is formed of a rod-like body extending so as to protrude from the shaft part,
The fastening member according to claim 1, wherein the fastening member is brought into contact with the other fastening member by being rotated with respect to the insertion hole through which the fastening portion is inserted.   The fastening member according to claim 1 or 2, wherein the fastening portion is chamfered at a corner portion of a fastening portion side abutting surface that abuts on the other fastened member.   2. The fastening portion is formed with at least one protrusion that can be fitted into at least one hole formed in a side surface of the other fastening member on the fastening portion side contact surface. The fastening member in any one of thru | or 3.   2. The fastening portion is formed with at least one hole that can be fitted into at least one protrusion formed on a side surface of the other fastened member on the fastening portion side contact surface. The fastening member in any one of thru | or 3.   The fastening member according to any one of claims 1 to 3, wherein the fastening part is formed with at least one convex part that presses the fastening part side contact surface. The fastening portion includes at least one protrusion that can be fitted into at least one hole formed on a side surface of the other fastening member on the fastening portion side contact surface;
And at least one convex part that presses the fastening part side contact surface,
The fastening member according to any one of claims 1 to 3, wherein the protrusion is higher in height from the fastening portion side contact surface than the convex portion. One fastened member;
The other fastened member;
The shaft,
Connected by the shaft,
An operation portion having an operation portion side contact surface that is in contact with the one fastened member on the shaft portion side;
A fastening part having a fastening part side contact surface that comes into contact with the other fastened member on the shaft part side, and
The fastening member is inserted into an insertion hole through which the fastening portion formed in each of the one fastened member and the other fastened member can be inserted, and the shaft portion has the one fastened member and the other fastened member. After being placed in a state where the member to be fastened is penetrated,
When the operation portion is rotated, the fastening portion is rotated, and the one fastening member and the other fastening member are sandwiched between the operation portion side contact surface and the fastening portion side contact surface. The fastening structure made into the structure fastened by this.   The fastening structure according to claim 8, wherein a restriction portion for stopping the rotation of the fastening portion of the fastening member at a fastening position is formed on the other fastening member on the fastening member side.   The prevention part which prevents that the said other to-be-fastened member by the side of the said fastening member is rotated in the opposite direction to the correct rotation direction for the said fastening member to fasten is formed. Fastening structure. A pressure unit;
A heating unit provided to face the pressing unit;
And at least one fastened member fastened to the other fastened member by the fastening member,
The fastening member is
The shaft,
Connected by the shaft,
An operation portion having an operation portion side contact surface that is in contact with the one fastened member on the shaft portion side;
A fastening portion having a fastening portion side abutting surface to be brought into contact with the other fastening member on the shaft portion side;
The fastening member is inserted into an insertion hole through which the fastening portion formed in each of the one fastened member and the other fastened member can be inserted, and the shaft portion has the one fastened member and the other fastened member. After being placed in a state where the member to be fastened is penetrated,
When the operation portion is rotated, the fastening portion is rotated, and the operation portion side contact surface and the fastening portion side contact surface sandwich the one fastened member and the other fastened member. The fixing device is configured to be fastened with a screw. An image forming apparatus main body;
An image carrier for holding an image;
A pressure unit;
A heating unit provided to face the pressing unit;
A fixing device having at least one fastened member fastened to the other fastened member of the image forming apparatus main body by a fastening member;
The fastening member is
The shaft,
Connected by the shaft,
An operation portion having an operation portion side contact surface that is in contact with the one fastened member on the shaft portion side;
A fastening portion having a fastening portion side abutting surface to be brought into contact with the other fastening member on the shaft portion side;
The fastening member is inserted into an insertion hole through which the fastening portion formed in each of the one fastened member and the other fastened member can be inserted, and the shaft portion has the one fastened member and the other fastened member. After being placed in a state where the member to be fastened is penetrated,
When the operation portion is rotated, the fastening portion is rotated, and the operation portion side contact surface and the fastening portion side contact surface sandwich the one fastened member and the other fastened member. An image forming apparatus configured to be fastened by the above.

Images