JP6423380B2 - Shaft locking device and shaft locking component - Google Patents

Description

  The present invention relates to a shaft locking device and a shaft locking component for positioning a shaft in the longitudinal direction of the shaft.

  A paper feeding unit for paper feeding in a printing machine, a copier, or the like includes a roller, a shaft, a power transmission gear, and support parts or locking parts thereof. Each component included in the paper feed unit needs to be fixed at a predetermined position. The support component or the locking component provides a function such as a shaft, a bearing, a locking mechanism, or a fitting mechanism with respect to some components. As a result, some parts are fixed at a specific position or restricted from moving in a specific direction. However, after the entire sheet feeding unit excluding the shaft (hereinafter referred to as “roller unit”) is moved to a predetermined position in the longitudinal direction on the shaft, an additional position for regulating the longitudinal position of the shaft of the roller unit is added. The locking part may be used to restrict movement or to be fixed at a predetermined position.

  The locking component is, for example, an E ring. The E-ring is a hollow disk opened in one direction, and is fitted into a groove formed in the circumferential direction of the shaft, thereby restricting the movement of the part into which the shaft is inserted in one of the longitudinal directions of the shaft. . The locking component is, for example, a screw. By installing the screw on the surface of the shaft, the movement of the part into which the shaft is inserted in one of the longitudinal directions of the shaft is restricted. Alternatively, the screw is installed in the roller unit and clamps the shaft, thereby fixing the component into which the shaft is inserted to the shaft.

  Since the roller is a consumable item, it may be removed from the paper supply unit and replaced or cleaned. However, when the shaft is locked using a locking part such as an E-ring or a screw in the paper feeding unit, the removed locking part is easily lost.

  An example of a technique related to a locking mechanism is disclosed in Patent Document 1. The pivotal support structure of Patent Document 1 includes a first tongue piece, a first slot, and a second tongue piece. The first tongue piece has an opening having an inner diameter through which a head portion and a main body portion of a pivot having a reduced diameter neck portion and an enlarged head portion can be inserted at one end. The first slot is a rectangular hole through which the head of the pivot can be inserted from the upper side after the head of the pivot is inserted through the opening of the first tongue piece. The second tongue piece has a width substantially equal to the outer diameter of the neck portion downward from the first slot and can be inserted only through the neck portion. The second slot has a lower end portion slightly wider than the intermediate portion. Have As a result of the above configuration, the pivot structure of Patent Document 1 positions the pivot in the longitudinal direction of the pivot so as to be detachable in the vertical direction of the pivot structure.

  Another example of the technology related to the locking mechanism is disclosed in Patent Document 2. The retaining member of Patent Document 2 has a longitudinal shape and includes a first notch and a second notch. The first cutout is a U-shaped cutout in the longitudinal direction formed at one end of the retaining member. The second notch is a U-shaped notch formed at the other end of the retaining member and substantially perpendicular to the longitudinal direction. Each of the first pin and the second pin is inserted into a hole formed in the shoe web. The retaining member is moved in the longitudinal direction and rotated around the first pin in a state where the first notch is fitted in the annular groove of the first pin, and the second notch is the second pin. Is fitted into the annular groove. As a result of the above operation, the retaining member disclosed in Patent Document 2 uses a single retaining member to prevent a plurality of pins from being detached.

Japanese Utility Model Publication No. 01-144515 JP 2001-140830 A

In the pivot structure of Patent Document 1, the first tongue piece and the second tongue piece can be separated. That is, in the pivot structure of Patent Document 1, the second tongue piece is easily lost when disassembled. Moreover, in the retaining member of Patent Document 2, the shoe web and the retaining member can be separated. That is, the retaining member of Patent Document 2 is likely to be lost when disassembled. Therefore, the techniques of Patent Document 1 and Patent Document 2 have a problem that the locking parts (the second tongue piece of Patent Document 1 and the retaining member of Patent Document 2) are easily lost during disassembly.
(Object of invention)
A main object of the present invention is to provide a shaft locking device and a shaft locking component capable of preventing loss of a shaft locking component for positioning a shaft detachable with respect to a bearing in the longitudinal direction of the shaft. is there.

  The shaft locking device of the present invention is configured such that the shaft is fitted in the longitudinal direction of the shaft by fitting the bearing portion having a shaft hole capable of detaching the shaft in the longitudinal direction and the shaft-side fitting portion provided at one end of the shaft. It is characterized by comprising a shaft locking component that is fixed in the longitudinal direction with respect to the bearing portion to be positioned, and that is movable and fixedly connected in a direction substantially perpendicular to the longitudinal direction.

  The shaft locking component of the present invention is included in a shaft locking device including a bearing portion having a shaft hole in which a shaft can be attached and detached in the longitudinal direction, and one end is fitted to a shaft side fitting portion provided on the shaft. The shaft is positioned in the longitudinal direction of the shaft, and is fixed to the bearing portion in the longitudinal direction, and is connected to be movable and fixed in a direction substantially perpendicular to the longitudinal direction.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the loss of the shaft locking component which positions the shaft which can be attached or detached with respect to a bearing in the longitudinal direction of a shaft can be prevented.

It is a figure which shows an example of a structure of the shaft latching apparatus of the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the roller unit of the 2nd Embodiment of this invention. It is a figure which shows an example of a structure of the roller unit of the 2nd Embodiment of this invention. It is a figure which shows an example of a structure of the roller unit of the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement of the roller unit of the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement of the roller unit of the 2nd Embodiment of this invention. It is a figure which shows an example of a structure of the roller unit of the 3rd Embodiment of this invention. It is a figure which shows an example of a structure of the roller unit of the comparative example which is not included in this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In all the drawings, equivalent components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
(First embodiment)
A configuration in the present embodiment will be described.

  FIG. 1 is a diagram illustrating an example of a configuration of a shaft locking device according to a first embodiment of the present invention. Specifically, FIG. 1A is a perspective view showing an appearance of the shaft locking device in a state where the shaft is positioned. FIG. 1B is a perspective view showing the appearance of the shaft locking device in a state where the positioning of the shaft is released and the shaft is slightly pulled out.

  The shaft locking device 100 according to the first embodiment of the present invention positions the shaft 200 in the longitudinal direction X of the shaft 200. The shaft locking device 100 provides a specific function at a predetermined position on the shaft 200 after positioning the shaft 200. The shaft locking device 100 is, for example, a roller component for feeding or discharging paper of a printing machine or a copying machine. The shaft 200 has a rod shape or a bendable rod shape. The shape of the cross section of the shaft 200 is arbitrary, but is, for example, a polygon or a circle. The material of the shaft 200 is arbitrary, but is, for example, metal or plastic. The shaft 200 includes a shaft-side fitting portion 210 installed in the middle of the shaft 200. The shaft-side fitting portion 210 has an arbitrary shape that can position the shaft 200 in the longitudinal direction X. The shape of the shaft-side fitting portion 210 is, for example, a plate having an outer diameter larger than the outer diameter of the shaft 200, a groove having an outer diameter smaller than the outer diameter of the shaft 200, a protrusion on the side surface of the shaft 200, or the shaft 200. It is a hole on the side. The shaft 200 is a shaft that holds, for example, a paper feeding component or a paper discharging component of a printing machine or a copying machine. The shaft locking device 100 includes a bearing portion 110 and a shaft locking component 150.

  The bearing portion 110 has a shaft hole 120 into which the shaft 200 can be inserted in the longitudinal direction X.

  The shape of the shaft hole 120 is an arbitrary shape in which a portion of the shaft 200 excluding the shaft side fitting portion 210 can be inserted. The shape of the shaft hole 120 is, for example, a hole having an inner diameter thicker than the outer diameter of the portion of the shaft 200 excluding the shaft-side fitting portion 210.

  The shaft locking component 150 is connected to the bearing portion 110 so as to be movable or rotatable. The shaft locking component 150 positions the shaft 200 in the longitudinal direction X of the shaft 200 with respect to the shaft locking device 100 by fitting one end of the shaft locking component 150 into the shaft side fitting portion 210. For example, the shaft locking component 150 is movable in a plane substantially perpendicular to the shaft 200 with respect to the bearing portion 110 (direction Y and direction Y ′ in FIG. 1). Alternatively, for example, the shaft locking component 150 can rotate in a plane substantially perpendicular to the shaft 200 with respect to the bearing portion 110. The shaft locking component 150 includes a locking component side fitting portion 160. The shaft locking component 150 has a position fixing mechanism 170.

  The locking component side fitting portion 160 is installed at one end of the shaft locking component 150 and is fitted to the shaft side fitting portion 210. When the shape of the shaft-side fitting portion 210 is a plate having an outer diameter that is thicker than the outer diameter of the shaft 200, the shape of the locking component-side fitting portion 160 is, for example, approximately the width to be fitted to the shaft 200. It is a board which has a U-shaped notch and the board thickness around a notch is thin. In this case, the outer diameter of the notch is thicker than the outer diameter of the portion of the shaft 200 excluding the shaft-side fitting portion 210 and thinner than the outer diameter of the shaft 200. In addition, the outer diameter of the portion where the plate thickness is thin is larger than the outer diameter of the shaft-side fitting portion 210. That is, the shape of the thin plate portion is such that the plate of the shaft side fitting portion 210 is accommodated in the shaft locking component 150 when the shaft side fitting portion 210 and the locking component side fitting portion 160 are fitted. It is the shape that is done. In FIG. 1, there is a thin part around the engaging part side fitting portion 160, and the thickness of the shaft engaging part 150 in the thin part is larger than the thickness of the shaft engaging part 150 in the other part. However, it is thin by the thickness of the board.

  Further, when the shape of the shaft side fitting portion 210 is a groove having an inner diameter thinner than the outer diameter of the shaft 200, the shape of the locking component side fitting portion 160 is, for example, a width that fits the shaft 200. This is a plate having a substantially U-shaped notch and a ridge on the inner surface of the notch. In this case, the outer diameter of the notch is larger than the outer diameter of the portion of the shaft 200 excluding the shaft side fitting portion 210. Further, the inner diameter of the flange is thinner than the outer diameter of the portion of the shaft 200 excluding the shaft-side fitting portion 210 and larger than the outer diameter of the shaft-side fitting portion 210. That is, the shape of the flange is such that the flange is accommodated in the groove of the shaft 200 when the shaft side fitting portion 210 and the locking component side fitting portion 160 are fitted.

  Further, when the shape of the shaft-side fitting portion 210 is a protrusion on the side surface of the shaft 200, the shape of the locking component-side fitting portion 160 is, for example, a plate having a hole on one side surface. In this case, the outer diameter of the hole is slightly larger than the outer diameter of the protrusion on the side surface of the shaft 200.

  Moreover, when the shape of the shaft side fitting part 210 is a hole on the side surface of the shaft 200, the shape of the locking part side fitting part 160 is, for example, a plate having a protrusion on one side surface. In this case, the outer diameter of the protrusion is slightly thinner than the outer diameter of the hole on the side surface of the shaft 200.

  The position fixing mechanism 170 fixes or releases the position of the shaft locking component 150 with respect to the bearing portion 110. However, the position fixing mechanism 170 may be fixed so that the position of the shaft locking component 150 is not easily changed, and the position of the shaft locking component 150 may not be completely fixed. The position of the shaft locking component 150 with respect to the bearing portion 110 can be moved or rotated by using a tool or manually. The position fixing mechanism 170 includes, for example, a through hole 180 and a fixing screw 190. Alternatively, the position fixing mechanism 170 is, for example, fixed in the longitudinal direction X of the shaft 200 to the bearing portion 110 of the shaft locking component 150, and a movable or rotatable connection in another direction, and the shaft locking component. It may be realized by a frictional force at the time of close contact between 150 and the bearing portion 110. Alternatively, the position fixing mechanism 170 may be, for example, fixed in the longitudinal direction X of the shaft 200 to the bearing portion 110 of the shaft locking component 150, and movable or rotatable in other directions, and the locking component side. It may be realized by a frictional force when play at the time of fitting between the fitting portion 160 and the shaft side fitting portion 210 is small.

  The through hole 180 is connected to the fixing screw 190 to connect the shaft locking member 150 to the bearing portion 110 so as to be movable or rotatable. When the shaft locking component 150 is movable with respect to the bearing portion 110, the through hole 180 is, for example, a long hole that is long in the movable direction. Alternatively, when the shaft locking component 150 is rotatable with respect to the bearing portion 110, the through hole 180 is, for example, a round hole that becomes the center of rotation.

  The fixing screw 190 fixes or releases the position of the shaft locking part 150 in a state where the shaft side fitting part 210 and the locking part side fitting part 160 are fitted. The fixing screw 190 has, for example, a retaining washer or a sufficient length so as not to be unintentionally removed. The fixing screw 190 is, for example, a screw that can be tightened or loosened using a tool, or a knurled screw that can be manually tightened or loosened.

  Note that the shaft locking device 100 may be capable of attaching and detaching the plurality of shafts 200 and may position the plurality of shafts 200. Further, the shaft locking device 100 may position the plurality of shafts 200 by using one shaft locking component 150 including the plurality of locking component side fitting portions 160. Further, the shaft locking device 100 may position one shaft 200 by linking a plurality of shaft locking components 150. For example, one shaft locking component 150 may be provided on the front side and the back side in FIG. 1 and the two may be linked to lock the shaft 200. Further, the shaft locking component 150 may have a plurality of through holes 180. Further, the shaft locking component 150 may include a plurality of fixing screws 190 for one through hole 180. Further, the shaft locking component 150 may include one or more fixing screws 190 and one or more guide pins (not shown) for one through hole 180. The guide pin restricts the movable direction of the shaft locking component 150.

  The operation in this embodiment will be described. In addition, operation | movement of the shaft locking device 100 is demonstrated about an example of a structure of the shaft locking device 100 shown by FIG. 1 here.

  First, the shaft 200 is positioned in the longitudinal direction X of the shaft 200 by the shaft locking device 100 (FIG. 1A).

  Next, the fixing screw 190 is loosened.

  Subsequently, the shaft locking component 150 is moved in the Y ′ direction. As a result, the engagement between the locking component side fitting portion 160 and the shaft side fitting portion 210 is released, so that the positioning of the shaft 200 with respect to the shaft locking device 100 is released.

  As a result of the above operation, the shaft 200 can be removed from the shaft locking device 100 in the longitudinal direction X (FIG. 1B).

  When the shaft 200 is inserted into the shaft locking device 100 in the longitudinal direction X ′ of the shaft 200, the reverse operation is performed.

  As described above, in the shaft locking device 100 of this embodiment, the shaft locking component 150 is connected to the bearing portion 110. That is, the shaft locking component 150 is not separated from the shaft locking device 100. Further, the position of the shaft locking component 150 is fixed by the position fixing mechanism 170 in the longitudinal direction X of the shaft 200 and the direction substantially perpendicular to the longitudinal direction X of the shaft 200 with respect to the bearing portion 110. Further, the position of the shaft side fitting portion 210 is fixed in the longitudinal direction X of the shaft 200 with respect to the shaft locking component 150 by the locking component side fitting portion 160. As a result, the position of the shaft 200 can be fixed with respect to the shaft locking device 100 in the longitudinal direction X of the shaft 200. Therefore, the shaft locking device 100 according to the present embodiment has an effect that it is possible to prevent the loss of the shaft locking component for positioning the shaft detachable with respect to the bearing in the longitudinal direction of the shaft.

Further, in the shaft locking device 100 of the present embodiment, when the shaft locking component 150 is movable or rotatable manually with respect to the bearing portion 110, the shaft 200 is attached to and detached from the shaft locking device 100. It can be executed manually. Therefore, in the shaft locking device 100 of the present embodiment, when the shaft locking component 150 is movable or rotatable with respect to the bearing portion 110 by hand, the shaft 200 is attached to and detached from the shaft locking device 100. There is an effect that a tool is unnecessary. In the shaft locking device 100, when a tool is required, a space for inserting and operating a tool such as a screwdriver or a hexagon wrench is required. That is, in the shaft locking device 100, when a tool is not required, a space necessary for installing the shaft locking device 100 or a space around the shaft locking device 100 necessary for operating the shaft locking device 100 is provided. There is an effect that it can be reduced.
(Second Embodiment)
Next, a roller unit according to a second embodiment of the present invention based on the shaft locking device 100 according to the first embodiment described above will be described. The roller unit of this embodiment is used in a paper feeding unit or a paper ejection unit of a printing machine or a copying machine. The rollers in the roller unit are parts that require replacement and cleaning.

  A configuration in the present embodiment will be described.

  2, 3 and 4 are views showing an example of the configuration of the roller unit 101 according to the second embodiment of the present invention. Specifically, FIG. 2 is a top view showing an appearance of the roller unit 101. FIG. 3 is a perspective view showing the appearance of the roller unit 101. FIG. 4 is a perspective view showing the appearance of the shaft locking component 151 of the roller unit 101.

  The roller unit 101 according to the present embodiment includes a feeding roller 301, a pickup roller 302, a power transmission gear 303, a power transmission gear 304, a power transmission gear 305, a power transmission gear 306, an intermediate shaft 202, and a holder. 111, a shaft locking part 151, and an E ring 157.

  The feeding roller 301 is a roller that feeds a sheet material. The roller surface of the feeding roller 301 is made of rubber, for example, and is a component that needs to be cleaned or replaced. The feeding roller 301 is formed integrally with the gear, and rotates by the rotational force transmitted from the gear. A power shaft 201 is pierced through the feed roller 301 so as to be inserted and removed. The feed roller 301 rotates about the power shaft 201 as a rotation axis.

  The pickup roller 302 is a roller that picks up a sheet material. The roller surface of the pickup roller 302 is made of rubber, for example, and is a component that needs to be cleaned or replaced. The pickup roller 302 is formed integrally with the gear and the rotation shaft, and rotates by the rotational force transmitted from the gear.

  The power transmission gear 303, the power transmission gear 304, the power transmission gear 305, and the power transmission gear 306 each transmit a rotational force and adjust the rotational speed ratio and distance between the feeding roller 301 and the pickup roller 302. Intermediate gear for. In the roller unit 101, the feeding roller 301 is rotated by transmitting the rotational force in the order of the power transmission gear 303, the power transmission gear 304, and the feeding roller 301. At the same time, the pickup roller 302 is rotated by transmitting the rotational force in the order of the power transmission gear 303, the power transmission gear 304, the power transmission gear 305, the power transmission gear 306, and the pickup roller 302. The power transmission gear 304 and the power transmission gear 306 are each formed integrally with the rotating shaft.

  The power transmission gear 303 is rotated in conjunction with the rotation of the power shaft 201. The power shaft 201 is rotated in conjunction with the rotation of the external power gear 205. The power gear 205 is attached to an external device (not shown) such as a printing machine or a copying machine, and is rotated by a power source such as a motor mounted on the device. The power shaft 201 is inserted into the power gear 205 so as to be insertable / removable. The power shaft 201 is inserted into the power transmission gear 303 so that it can be inserted and removed.

  The intermediate shaft 202 is a rotating shaft of the power transmission gear 305. Note that the rotation shaft of the power transmission gear 305 may be formed on the holder 111 or the like, and in this case, the intermediate shaft 202 is not necessary. The intermediate shaft 202 does not need to be removed from the holder 111 when the feeding roller 301 or the pickup roller 302 is removed from the holder 111. Therefore, the position of the intermediate shaft 202 is regulated in the longitudinal direction of the intermediate shaft 202 by fitting the E ring 156 and the E ring 157 into the grooves on both ends. The intermediate shaft 202 is a rotating shaft of the shaft locking component 151. The intermediate shaft 202 sandwiches the shaft locking component 151 between the E-ring 157 and the holder 111, and thereby arranges the shaft locking component 151 rotatably at a predetermined position in the longitudinal direction of the intermediate shaft 202.

  The holder 111 includes a feeding roller 301, a pickup roller 302, a power shaft 201, an intermediate shaft 202, a power transmission gear 303, a power transmission gear 304, a power transmission gear 305, and a power transmission gear 306. Arrange at a predetermined position. The positions of the parts arranged in the holder 111 are regulated by being arranged so that the parts fit each other. First, the positional restriction of the power shaft 201 in the longitudinal direction will be described. The position of the power transmission gear 303 is regulated by the holder 111, the power transmission gear 304, and the paper feed roller 301. The position of the power transmission gear 304 is regulated by the power transmission gear 303 and the power transmission gear 305. The position of the power transmission gear 305 is regulated by the holder 111 and the power transmission gear 306. The position of the power transmission gear 306 is regulated by the holder 111, the power transmission gear 305, and the pickup roller 302. The position of the pickup roller 302 is regulated by the holder 111 and the power transmission gear 306. The position of the feeding roller 301 is regulated by the holder 111 and the power transmission gear 304. Next, position restriction in a direction orthogonal to the longitudinal direction of the power shaft 201 will be described. The rotation shaft of the power transmission gear 304 is fixed by the holder 111. The transmission shaft of the power transmission gear 305 is fixed by the intermediate shaft 202. The feed roller 301 has a rotating shaft fixed by the power shaft 201. The holder 111 has a recess 113.

  The pickup roller 302 is a component that needs to be cleaned and replaced in the same manner as the feeding roller 301. However, both ends of the rotation shaft of the pickup roller 302 are supported by shaft holes formed in the holder 111. Therefore, the pickup roller 302 can be removed by elastically deforming the holder 111. However, from the viewpoint of strength and the like, the rotation shaft of the pickup roller 302 may be a shaft. When the rotation shaft of the pickup roller 302 is a shaft, it is necessary to be locked by a shaft locking component in the same manner as the feeding roller 301 in order to regulate the position of the shaft.

  The power shaft 201 is a shaft having a groove 211 and a groove 212. The distance between the groove 211 and the groove 212 is a distance obtained by adding a tolerance to the longitudinal width of the power shaft 201 of the roller unit 101. The power shaft 201 includes a lever 204 and an E ring 158.

  The lever 204 is a lever for fixing and releasing the paper feeding unit (including the roller unit 101 and the power shaft 201 and excluding the power gear 205) with respect to an external device (not shown). By operating the lever 204, the paper feeding unit can be detached from an external device.

  The E-ring 158 is fitted in the groove 212 and regulates the position in the longitudinal direction of the power shaft 201 of the roller unit 101 in one direction.

  The shaft locking component 151 regulates the position of the power shaft 201 with respect to the roller unit 101 in the longitudinal direction of the power shaft 201. The shaft locking component 151 includes a protrusion 153, a hook 161, and a through hole 181. As shown in FIG. 4, the protrusion 153 and the hook 161 are provided on opposite sides of the through hole 181. The shaft locking component 151 is attached to the holder 111. The shaft locking component 151 is rotatably connected to the holder 111 by inserting the intermediate shaft 202 into the through hole 181 and being sandwiched between the holder 111 and the E ring 157. The position of the power shaft 201 in the longitudinal direction with respect to the holder 111 is regulated by the hook 161 of the shaft locking component 151 being locked in the groove 211 of the power shaft 201. The locking state of the hook 161 with the groove 211 is maintained by the protrusion 153 being locked with the recess 113. In FIG. 3, the protrusion 153 is on the back side and is not visible. The protrusion on the near side in FIG. 3 is a protrusion for the user to operate the shaft locking component 151. In FIG. 4, the protrusion 153 is a substantially hemispherical protrusion that is visible on the front side. In FIG. 3, the recess 113 is locked to the protrusion 153 and is not visible, but is a substantially hemispherical recess formed at the center of the raised pedestal portion. The projection 153 and the recess 113 are locked by fitting a substantially hemispherical projection and a substantially hemispherical recess with elasticity.

  The E-ring 157 restricts the position of the shaft locking component 151 in the longitudinal direction of the power shaft 201.

  Other configurations in the present embodiment are the same as those in the first embodiment.

  The operation in this embodiment will be described.

  5 and 6 are diagrams for explaining the operation of the roller unit 101 according to the second embodiment of the present invention. Specifically, FIG. 5 shows the roller unit 101 in a state where the engagement with the power shaft 201 is released. FIG. 6 shows the roller unit 101 with the power shaft 201 removed and the feeding roller 301 removed.

  First, the operation of the shaft locking component 151 will be described.

  In a state where the locking with respect to the power shaft 201 is released (FIG. 5), the shaft locking component 151 is rotated around the intermediate shaft 202 (rotated clockwise in FIG. 5). When the protrusion 153 is locked to the recess 113, the position of the shaft locking component 151 in the rotation direction with respect to the holder 111 is fixed. In a state where the position in the rotational direction is fixed, the hook 161 is locked in the groove 211, whereby the position in the longitudinal direction of the power shaft 201 with respect to the holder 111 is regulated (FIG. 3).

  Next, the operation of releasing the locked state between the shaft locking component 151 and the power shaft 201 and the operation of removing the feeding roller 301 from the holder 111 will be described.

  First, by operating the lever 204, the paper feeding unit is removed from the external device (FIG. 3).

  Subsequently, the shaft locking component 151 is rotated around the intermediate shaft 202 (rotated counterclockwise in FIG. 3). The locking of the protrusion 153 locked to the recess 113 is released, and the fixing of the position of the shaft locking component 151 in the rotational direction with respect to the holder 111 is released. In the state where the position fixing in the rotational direction is released, the position restriction in the longitudinal direction of the power shaft 201 with respect to the holder 111 is released by releasing the engagement between the hook 161 and the groove 211 (FIG. 5). In the state where the longitudinal position restriction of the power shaft 201 with respect to the holder 111 is released, the power shaft 201 can be pulled out in the X direction of FIG. When the power shaft 201 is pulled out in the X direction, the feeding roller 301 is released from the holder 111 and can be removed from the holder 111 (FIG. 6).

  Note that the fixing force and the releasing force in the position fixing mechanism 171 (the recess 113 and the protrusion 153) between the shaft locking component 151 and the holder 111 are the positional relationship, shape, height, and depth of the recess 113 and the protrusion 153. Alternatively, it can be adjusted by changing the cross-sectional areas of the recess 113 and the protrusion 153.

  Other operations in the present embodiment are the same as those in the first embodiment.

  FIG. 8 is a diagram showing an example of a configuration of a roller unit of a comparative example not included in the present invention.

  In the roller unit 109 of the comparative example not included in the present invention, the shaft locking component 151 of the roller unit 101 of this embodiment is replaced with an E-ring 159.

  When the E-ring 159 is removed from the roller unit 109, it is separated from the holder 119. Therefore, when the E-ring 159 is removed from the power shaft 201, the E-ring 159 may be lost. Further, the E-ring 159 requires a tool to be removed from the power shaft 201 and cannot be removed manually.

  As described above, in the roller unit 101 of the present embodiment, the shaft locking component 151 is connected to the holder 111. That is, the shaft locking component 151 is not separated from the holder 111. Further, the shaft locking component 151 is fixed in position in the longitudinal direction X of the power shaft 201 with respect to the holder 111 by the position fixing mechanism 171, and is centered in a direction substantially perpendicular to the longitudinal direction X of the power shaft 201. Is fixed. Further, the position of the groove 211 is fixed in the longitudinal direction X of the power shaft 201 with respect to the shaft locking component 151 by the hook 161. As a result, the position of the power shaft 201 can be fixed with respect to the roller unit 101 in the longitudinal direction X of the power shaft 201. Therefore, the roller unit 101 of the present embodiment has an effect that it is possible to prevent the loss of the shaft locking component that positions the shaft detachable with respect to the bearing in the longitudinal direction of the shaft.

Further, in the roller unit 101 of the present embodiment, the shaft locking component 151 can be rotated manually with respect to the holder 111. Therefore, the attachment and detachment of the power shaft 201 with respect to the roller unit 101 can be performed manually. Therefore, the roller unit 101 according to the present embodiment has an effect that no tool is required to attach / detach the power shaft 201 to / from the roller unit 101.
(Third embodiment)
Next, a roller unit according to a third embodiment of the present invention based on the roller unit 101 according to the second embodiment of the present invention described above will be described. In the roller unit of the present embodiment, in the roller unit 101 of the second embodiment, the pickup roller 302 is held by the additional shaft so that the additional shaft is positioned by the shaft locking component in addition to the power shaft 201. Be changed.

  A configuration in the present embodiment will be described.

  FIG. 7 is a diagram showing an example of the configuration of the roller unit 102 according to the third embodiment of the present invention. Specifically, FIG. 7 is a perspective view showing the appearance of the roller unit 102.

  In the roller unit 102 of the present embodiment, the pickup roller 302 in the roller unit 101 of the second embodiment is replaced with a pickup roller 307 including a shaft 203 that is a rotating shaft. Further, in the roller unit 102 of the present embodiment, the shaft locking component 151 in the roller unit 101 of the second embodiment is replaced with a shaft locking component 152 that locks the power shaft 201 and the shaft 203.

  The shaft 203 has a groove 213. The groove 213 is formed in a portion protruding to the outside of the holder 112.

  The shaft 203 is removably inserted into the pickup roller 307. The pickup roller 307 rotates around the shaft 203 as a rotation axis.

  The shaft locking component 152 regulates the position of the shaft 203 in the longitudinal direction of the shaft 203. The shaft locking component 152 includes a protrusion 153, a hook 161, a hook 162, and a through hole 181. The shaft locking part 152 is attached to the holder 112. The shaft locking component 152 is rotatably connected to the holder 112 by inserting the intermediate shaft 202 into the through hole 181 and sandwiching the shaft with the holder 112 and the E ring 157. The position of the shaft 203 in the longitudinal direction with respect to the holder 112 is regulated by the hook 162 of the shaft locking part 152 being locked in the groove 213 of the shaft 203. The locking state of the hook 162 to the groove 213 is maintained by the protrusion 153 being locked to the recess 113.

  The hook 161 and the hook 162 of the shaft locking part 152 are formed in opposite directions to each other, and when the shaft locking part 152 rotates with respect to the holder 112, the power shaft 201 and the shaft 203 are simultaneously locked or The lock is released.

  Other configurations in the present embodiment are the same as those in the second embodiment.

  The operation in this embodiment will be described.

  First, the operation of the shaft locking component 152 will be described.

  In a state where the locking with respect to the power shaft 201 is released (FIG. 7), the shaft locking component 152 is rotated (clockwise in FIG. 7) about the intermediate shaft 202. When the protrusion 153 is locked in the recess 113, the position of the shaft locking component 152 in the rotation direction with respect to the holder 112 is fixed. In the state where the position in the rotation direction is fixed, the hook 162 is locked in the groove 213, whereby the longitudinal position of the shaft 203 with respect to the holder 112 is regulated.

  Next, the operation of releasing the locked state between the shaft locking component 152 and the shaft 203 and the operation of removing the pickup roller 307 from the holder 112 will be described.

  First, by operating the lever 204, the paper feeding unit is removed from the external device.

  Next, the shaft locking component 152 is rotated around the intermediate shaft 202 (counterclockwise in FIG. 7). The locking of the protrusion 153 locked to the recess 113 is released, and the fixing of the position of the shaft locking component 152 in the rotational direction with respect to the holder 112 is released. In the state where the position fixing in the rotational direction is released, the locking of the hook 162 and the groove 213 is released, so that the position restriction in the longitudinal direction of the shaft 203 with respect to the holder 112 is released. In a state where the longitudinal position restriction of the shaft 203 with respect to the holder 112 is released, the shaft 203 can be pulled out in the X direction or the X ′ direction in FIG. 7. When the shaft 203 is pulled out in the X direction or the X ′ direction, the pickup roller 307 is unlocked from the power transmission gear 306 and the holder 112 and can be detached from the holder 112.

  Other operations in the present embodiment are the same as those in the second embodiment.

  As described above, the function of the roller unit 102 of the present embodiment includes the function of the roller unit 101 of the second embodiment of the present invention. Therefore, the effect of the roller unit 102 of this embodiment includes the effect of the roller unit 101 of the second embodiment of the present invention.

  Further, in the roller unit 102 of this embodiment, the power shaft 201 and the shaft 203 are simultaneously positioned and released from positioning. Therefore, the roller unit 102 of the present embodiment has an effect that the two shafts (the power shaft 201 and the shaft 203) can be positioned and released using one shaft locking part 152.

  In each of the above-described embodiments of the present invention, the position fixing mechanism of the shaft locking component has been described. However, the position fixing mechanism of the present invention is not limited to the above-described position fixing mechanism.

  For example, the shaft that supports the shaft locking component may be formed directly on the holder. Alternatively, for example, the shaft that supports the shaft locking component may be formed as a stud shaft on the side surface of the holder, and the shaft locking component may be fixed to the stud shaft using an E-ring, a screw, a claw, or the like.

  Moreover, the attachment method with respect to the holder of a shaft latching component is not limited to the attachment method which can be translated or rotated between a position fixed state and a position fixed release state. For example, the shaft locking component may be connected to the holder with a wire or the like and can be fitted to the shaft from any direction. The fitting state is maintained by, for example, the elasticity of the shaft locking part or the frictional force when the play at the time of fitting between the shaft locking part and the shaft is small.

  In each of the above-described embodiments of the present invention, the fitting mechanism between the shaft locking component and the shaft has been described. However, the fitting mechanism of the present invention is not limited to the above-described fitting mechanism.

  The fitting mechanism of the present invention is a fitting mechanism in which there is no independently separable shaft locking component when fitting and when releasing the fitting. For example, the concavo-convex shape of the fitting portion on each of the fitting device side and the shaft side may be opposite to the above description, or may be a shape different from the above description. For example, the fitting portions on the fitting device side and the shaft side may have shapes that are fitted or released by elasticity. Alternatively, for example, the fitting state of the fitting portion on the fitting device side and the shaft side may be maintained or released using the contraction force of the spring or the magnetic force of the magnet.

  Further, the application target of the shaft locking component of the present invention is not limited to a paper feeding unit such as a printing machine or a copying machine. The object to be removed from the shaft locking device of the present invention is not limited to the roller. The subject of application of the shaft locking component of the present invention is any device that is positioned and attached to the shaft, including components that may be replaced.

  The present invention has been described above by way of example using the above-described embodiment and its examples. However, the technical scope of the present invention is not limited to the scope described in the above-described embodiment and its examples. It will be apparent to those skilled in the art that various modifications and improvements can be made to such embodiments. In such a case, new embodiments to which such changes or improvements are added can also be included in the technical scope of the present invention. This is clear from the matters described in the claims.

  INDUSTRIAL APPLICABILITY The present invention can be used in applications in which components including replacement parts such as rollers are positioned and mounted on a shaft in devices such as multifunction machines, copiers, printers, and fax machines.

DESCRIPTION OF SYMBOLS 100 Shaft locking device 101 Roller unit 102 Roller unit 109 Roller unit 110 Bearing part 111 Holder 112 Holder 113 Recessed part 119 Holder 120 Shaft hole 150 Shaft locking part 151 Shaft locking part 152 Shaft locking part 153 Protrusion 156 E ring 157 E Ring 158 E-ring 159 E-ring 160 Locking part side fitting portion 161 Hook 162 Hook 170 Position fixing mechanism 171 Position fixing mechanism 180 Through hole 181 Through hole 190 Fixing screw 200 Shaft 201 Power shaft 202 Intermediate shaft 203 Shaft 204 Lever 205 Power gear 210 Shaft side fitting portion 211 Groove 212 Groove 213 Groove 301 Feed roller 302 Pickup roller 303 Power transmission gear 304 Power Transmission gear 305 Power transmission gear 306 Power transmission gear 307 Pickup roller

Claims (4)

A bearing portion having a shaft hole capable of detaching the shaft in the longitudinal direction;
The shaft is positioned in the longitudinal direction of the shaft by fitting one end into a shaft-side fitting portion provided on the shaft. The shaft is fixed in the longitudinal direction with respect to the bearing portion, and substantially in the longitudinal direction. A roller unit comprising a shaft locking part that is movable and fixably movable in a vertical direction ,
The shaft locking component, roller unit according to claim <br/> that is rotatable in a substantially plane perpendicular to the shaft relative to the bearing portion. The roller unit according to claim 1, wherein the shaft locking component positions a plurality of the shafts in a longitudinal direction of the shaft. Included in the roller unit including a bearing portion having a shaft hole in which the shaft can be attached and detached in the longitudinal direction;
The shaft is positioned in the longitudinal direction of the shaft by fitting one end into a shaft-side fitting portion provided on the shaft. The shaft is fixed in the longitudinal direction with respect to the bearing portion, and substantially in the longitudinal direction. A shaft locking part connected in a vertically movable and fixed manner,
A shaft locking component, wherein the shaft locking component is rotatable in a plane substantially perpendicular to the shaft with respect to the bearing portion . The shaft locking component according to claim 3 , wherein the plurality of shafts are positioned in a longitudinal direction of the shaft.

Images