JP2014148401A - Rotation transmission mechanism and cut sheet transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation transmission mechanism which can transmit rotation between two transport rollers whose rotation axes intersect with each other and can make the rotational speeds of the transport rollers different by a simple configuration, and to provide a cut sheet transport device using the rotation transmission mechanism.SOLUTION: In a rotation transmission mechanism 40, a relay roller 41 sandwiched by the most downstream transport roller 20K and a feed roller 30 has a rotation axis L3 parallel to the feed roller 30, and the relay roller 41 is brought into frictional contact with the feed roller 30 at a column-shaped large-diameter contact part 42 and brought into frictional contact with the most downstream transport roller 20K at an approximately circular truncated cone-shaped small-diameter contact part 43.

Description

  The present invention relates to a rotation transmission mechanism that transmits rotational power between a first conveyance roller and a second conveyance roller that are arranged adjacent to each other so that their rotation axes intersect, and a cut sheet conveyance device including the rotation transmission mechanism.

  As a conventional cut sheet transport device, a plurality of transport rollers are arranged obliquely with respect to the guide wall, and the transport roller group is driven by a common rotational drive source so that one side of the cut sheet is aligned with the guide wall and transported. What is known is known (for example, Patent Document 1). Further, in recent years, a feed roller perpendicular to the guide wall is provided on the downstream side of the transport roller group, and this feed roller is driven by a rotation drive source different from the transport roller group, and the rotation speed of the feed roller is controlled by the rotation of the transport roller. A cut sheet conveying apparatus having a speed larger than the speed has also been proposed.

JP 2007-106558 A ([0013], FIG. 1)

  However, the above-described cut sheet conveying device including the feeding roller has a problem that the number of rotational driving sources is increased. Also, even if the rotation of the transport roller group is transmitted to the delivery roller using, for example, a bevel gear, the number of gears is increased to make the rotational speeds of the transport roller and the delivery roller different, and the rotation transmission mechanism becomes complicated. There was a problem.

  The present invention has been made in view of the above circumstances, and has a simple configuration and can transmit rotation between two conveyance rollers whose rotation axes intersect with each other and can rotate the conveyance rollers at different rotation speeds. It is an object of the present invention to provide a transmission mechanism and a cut sheet conveying apparatus including the transmission mechanism.

  The rotation transmission mechanism according to the first aspect of the invention made to achieve the above object is such that the rotation axes of the rotation transmission mechanisms are adjacent to each other among a plurality of conveyance rollers that are arranged in parallel in the conveyance direction to form a conveyance surface. In the rotation transmission mechanism that transmits rotational power between the first conveyance roller and the second conveyance roller disposed in the outer diameter of the first conveyance roller and the second conveyance roller, the outer diameter is smaller than that of the first conveyance roller and the second conveyance roller. A transmission roller is disposed between the conveyance rollers in parallel with the first conveyance roller. The transmission roller is a cylindrical large-diameter contact portion that is in frictional contact with the first conveyance roller, and the first conveyance is larger than the large-diameter contact portion. It is arranged on the side where the gap between the roller and the second transport roller is narrow, and has a feature that it has a small diameter contact portion that is smaller in outer diameter than the large diameter contact portion and frictionally contacts the second transport roller. .

  According to a second aspect of the present invention, in the rotation transmission mechanism according to the first aspect, the small-diameter contact portion is connected to the large-diameter contact portion, and gradually decreases in diameter as the distance from the large-diameter contact portion increases and bulges outward. It is characterized by the R shape.

  A third aspect of the invention is characterized in that in the rotation transmission mechanism according to the first or second aspect, a transmission roller pressing means for pressing the transmission roller against both the first conveyance roller and the second conveyance roller is provided.

  According to a fourth aspect of the present invention, in the rotation transmission mechanism according to the third aspect, the transmission roller pressing unit includes a transmission roller urging unit that urges the transmission roller toward the second conveyance roller in the axial direction of the transmission roller, and transmission. It is characterized in that it comprises a rotation support portion that supports the roller so as to be rotatable about an axis parallel to the transmission roller and allows the transmission roller to move toward the first conveyance roller.

  According to a fifth aspect of the present invention, in the rotation transmission mechanism according to the fourth aspect, the transmission roller urging means rotatably supports the transmission roller at the tip portion and moves toward the second conveyance roller in the axial direction of the transmission roller. The urging leaf spring is characterized in that the rotation support portion is a leaf spring support portion that supports the base end portion of the leaf spring so as to be rotatable about an axis parallel to the transmission roller.

  According to a sixth aspect of the present invention, there is provided a cut sheet conveying apparatus including a guide wall extending in a lateral direction at a side of a conveying roller group having a plurality of conveying rollers arranged side by side, and a rotation axis of the conveying roller orthogonal to the guide wall. This is a cut paper transport device that is arranged so as to incline to the downstream side with respect to the shaft to be transported with one side of the square cut paper aligned with the guide wall, and is orthogonal to the guide wall on the downstream side of the transport roller group 6. The invention according to claim 1, wherein a feed roller having a rotating shaft is provided, and the rotation transmission mechanism between the feed roller and the most downstream transport roller located on the most downstream side in the transport roller group is defined in any one of claims 1 to 5. The rotation transmission mechanism described above is provided, and the large diameter contact portion is brought into frictional contact with the feed roller, and the small diameter contact portion is brought into friction contact with the most downstream conveying roller.

  According to a seventh aspect of the present invention, in the cut paper conveying device according to the sixth aspect, the cut paper conveying device includes a roller support frame that surrounds four sides of the plurality of conveying rollers and rotatably supports the rollers, and the length of the feeding roller is the maximum. It is characterized in that it is shorter than the length of the downstream conveying roller and the feeding roller is housed in a triangular gap sandwiched between the guide wall and the most downstream conveying roller.

  According to an eighth aspect of the present invention, in the cut sheet conveying device according to the seventh aspect, the side wall extending portion extending upward from the downstream side wall of the roller support frame is bent upstream to cover the transmission roller from above. It is characterized by having a roller cover.

[Inventions of Claims 1, 2, 6]
In the first aspect of the invention, the rotation transmission mechanism for transmitting rotational power between the first conveyance roller and the second conveyance roller has a smaller outer diameter than the first conveyance roller and the second conveyance roller, A transmission roller disposed parallel to the first conveyance roller is provided between the second conveyance roller and the second conveyance roller. The transmission roller is in frictional contact with the first conveyance roller at the large diameter contact portion having a cylindrical shape, and is in frictional contact with the second conveyance roller at the small diameter contact portion. Here, the small diameter contact portion is arranged on the side where the distance between the first conveyance roller and the second conveyance roller is narrower than the large diameter contact portion, and the outer diameter is smaller than the large diameter contact portion. The rotational speed of the first transport roller that is in frictional contact with the large diameter contact portion is greater than the rotational speed of the second transport roller that is in frictional contact with the small diameter contact portion.

  As described above, according to the present invention, the first and second transport rollers are driven by the common rotational drive source only by providing the transmission roller between the first transport roller and the second transport roller. The rotation speed of the transport roller can be varied. That is, it is possible to transmit the rotation between the first and second transport rollers whose rotation axes intersect with each other and to make the rotation speeds of the transport rollers different with a simpler configuration than in the past.

  Here, if the small-diameter contact portion is formed in an R shape that is connected to the large-diameter contact portion and gradually decreases in diameter as the distance from the large-diameter contact portion increases, the small-diameter contact portion and the second transport roller Can be point-contacted, and power transmission loss can be reduced (invention of claim 2). Even if the outer peripheral surface of the small diameter contact portion is tapered, the power transmission loss can be reduced if the contact area between the small diameter contact portion and the second transport roller is reduced.

  Further, the transmission roller may have a dumbbell shape as a whole, and one end of the transmission roller may have a cylindrical shape, and the other end may have a spherical shape. It is also possible to have a configuration.

  According to the cut sheet conveying apparatus of the sixth aspect, the feeding roller can be rotated using the rotation driving source of the conveying roller. Moreover, since the rotation speed of the feed roller is higher than the rotation speed of the most downstream conveyance roller, the cut sheet can be smoothly conveyed.

[Invention of claim 3]
According to the invention of claim 3, even when the transmission roller is worn, the transmission roller can be brought into frictional contact with the first conveyance roller and the second conveyance roller.

[Inventions of Claims 4 and 5]
In the invention of claim 4, when the small diameter contact portion and the large diameter contact portion of the transmission roller are worn, the transmission roller urging means pushes the transmission roller toward the second conveying roller in the axial direction of the transmission roller, and the small diameter contact portion is Pressed by the second transport roller. Here, in the present invention, since the transmission roller is supported by the rotation support portion so as to be rotatable about an axis parallel to the transmission roller, there is a gap between the large diameter contact portion and the first conveying roller. If there exists, a transmission roller will slide along the axial direction of a 2nd conveyance roller, and will move to the 1st conveyance roller side until a large diameter contact part contacts with a 1st conveyance roller. Thus, according to the present invention, the transmission roller can be pressed against both the first conveyance roller and the second conveyance roller only by urging the transmission roller in one direction by the transmission roller urging means.

  Here, a roller support block that rotatably supports the transmission roller is provided, and the transmission roller biasing means is a coil spring, a plate spring, a disc spring, or the like that is attached to the roller support block and biases the transmission roller in the axial direction. The rotation support portion may be configured to support the roller support block so as to be rotatable about an axis parallel to the transmission roller. As in the invention of claim 5, the transmission roller urging means includes: A leaf spring that rotatably supports the transmission roller at the distal end portion and urges the second conveyance roller side in the direction of the rotation axis of the transmission roller is used, and the rotation support portion is parallel to the transmission roller. It is good also as a structure made into the leaf | plate spring support part supported so that it can rotate to the periphery of a certain axis | shaft. According to the invention of claim 5, the transmission roller urging means and the rotation support portion can be made simple.

[Invention of Claim 7]
According to the seventh aspect of the invention, the distance between the feed roller and the transport roller group can be reduced to reduce the transmission roller.

[Invention of Claim 8]
According to invention of Claim 8, it can prevent that a conveyed product contacts the transmission roller rotated in a reverse direction with a conveyance roller and a sending-out roller. Further, since the roller cover can be formed integrally with the roller support frame, the strength of the roller cover can be improved.

The front view of the cut sheet conveying apparatus which concerns on 1st Embodiment of this invention. Perspective view of the cut paper transport device as seen from the front Plan view of cut paper transport device AA sectional view around the transport roller group Perspective view of roller support frame before bending side wall extension Plan view of rotation transmission mechanism Top view of transmission roller Side view of rotation transmission mechanism Front view of rotation transmission mechanism (A) Plan view of the transmission roller before being urged by the leaf spring, (B) Plan view of the transmission roller when in contact with the most downstream conveying roller Side sectional view of the rotation transmission mechanism according to the second embodiment of the present invention. BB cross section of rotation transmission mechanism Side sectional view of a rotation transmission mechanism according to a third embodiment of the present invention. CC cross section of rotation transmission mechanism The top view of the cut sheet conveying apparatus which concerns on 4th Embodiment of this invention. Plan view of rotation transmission mechanism The top view of the curve conveyor concerning a 5th embodiment of the present invention. Plan view of rotation transmission mechanism (A) Plan view of transmission roller according to modification, (B) Plan view of transmission roller according to modification, (C) Plan view of transmission roller according to modification (A) Plan view of transmission roller according to modification, (B) Plan view of transmission roller according to modification, (C) Plan view of transmission roller according to modification

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the cut sheet conveying apparatus 10 of the present embodiment is disposed between a cut sheet feeder 80 and a downstream apparatus 90, and has a rectangular cut sheet S (feed from the cut sheet feeder 80 ( 3) to the downstream apparatus 90.

  The cut sheet feeder 80 is formed by assembling various components to a base frame 82 fixed to the upper surface of the apparatus base 81, and a cut sheet stacking unit 83 capable of stacking a plurality of cut sheets S above and below the base frame 82. have. Then, the cut sheet feeder 80 feeds the cut sheets S from the lower end of the cut sheet group G stacked on the cut sheet stacking section 83 one by one by a feeding belt 84 provided below the cut sheet stacking section 83 (side by side). Pull it out (left side of FIG. 1) and feed it. A multi-feed regulating member 85 is provided on the downstream side of the cut sheet stacking portion 83 in the feeding direction of the cut sheet S so as to adjust the distance from the feeding belt 84 so that only one cut sheet 90 passes. It has been.

  In the downstream apparatus 90, for example, processing such as reading of a barcode written on the cut sheet S and printing on the cut sheet is performed. For this reason, in the cut sheet conveying apparatus 10, one side of the cut sheet S is aligned with the guide wall 11 described below and conveyed to the downstream apparatus 90. In this specification, unless otherwise specified, the term “upstream” refers to the cut sheet feeder 80 side (the right side in FIG. 1) in the left-right direction, and the term “downstream” refers to the downstream device in the left-right direction. The 90 side (the left side in FIG. 1) shall be pointed out.

  As shown in FIG. 2, the cut sheet conveying apparatus 10 includes a guide wall 11 extending in the left-right direction at the upper end of the rear end, and a group of conveying rollers in which a plurality of conveying rollers 20 are arranged side by side in front of the guide wall 11. 20G is provided. And the conveyance surface M1 (refer FIG.1 and FIG.4) is formed in the upper end of these conveyance roller groups 20G.

  Specifically, the plurality of transport rollers 20 are arranged on the upper part of the cut sheet transport device 10 and have a front side portion 15C and a rear side portion 15D (see FIG. 5) of the roller support frame 15 having a substantially rectangular frame shape in plan view. Is rotatably supported. The guide wall 11 described above stands from the rear side 15D of the roller support frame 15. Further, the right side 15A and the left side 15B of the roller support frame 15 are stepped higher than the front and back sides 15C and 15D. In detail, the upper surface of the right side portion 15A is disposed flush with or slightly above the transport surface M1, and the upper surface of the left side portion 15B is disposed slightly below the transport surface M1.

  As shown in FIG. 3, the rotation axis of each conveyance roller 20 has the same diameter as the conveyance roller 20, and the front end portion on the side away from the guide wall 11 with respect to the reference axis L <b> 1 orthogonal to the guide wall 11 is It arrange | positions so that it may incline only 5 degree | times downstream, for example. That is, the rotation shaft of the transport roller 20 is inclined downstream with respect to the reference axis L1.

  Next, a driving mechanism for the transport roller group 20G will be described. In the cut sheet conveying apparatus 10 of the present embodiment, the conveying roller group 20G is rotationally driven by a common rotational driving source. Specifically, as shown in FIG. 4, the cut sheet conveyance device 10 includes a conveyance roller drive motor 21 as the rotation drive source below the conveyance roller group 20 </ b> G, and the rotation of the conveyance roller drive motor 21. Is transmitted to each conveying roller 20 via a belt 25. The transport roller driving motor 21 is fixed to a bracket 29 attached to a pair of beam members 28 and 28 that are passed to the front and rear sides 15C and 15D of the roller support frame 15.

  More specifically, a plurality of transport pulleys 24 are arranged side by side so as to be parallel to the transport rollers 20 below the transport roller group 20G, and a pair of relay pulleys are disposed below the transport pulley group 24G. 23, and a driving pulley 22 that rotates integrally with an output rotation shaft 21A of a speed reducer 21G (see FIG. 3) of the transport roller driving motor 21 is disposed. The belt 25 described above is placed between the transport pulley group 24G, the pair of relay pulleys 23 and 23, and the drive pulley 22, and the belt 25 is in contact with the transport rollers 20 from below, thereby driving the transport rollers. The rotation of the motor 21 is transmitted to each conveyance roller 20.

  As shown in FIG. 3, the belt 25 is disposed obliquely such that the upstream end is disposed forward with respect to the downstream end, and when viewed from above, each of the transport rollers 20. It arrange | positions so that it may orthogonally cross with the rotating shaft.

  As shown in FIG. 3, a delivery roller 30 having a rotation axis L4 (see FIG. 6) parallel to the reference axis L1 is provided on the downstream side of the transport roller group 20G. The feed roller 30 has a shorter axial length than the transport roller 20, and is sandwiched between the most downstream transport roller 20K disposed on the most downstream side of the transport roller group 20G and the left end (downstream end) of the roller support frame 15. Is accommodated in a triangular gap 31 (see FIG. 6).

  Specifically, the feed roller 30 is disposed outside the left side portion 15B of the roller support frame 15, and is rotatably supported by the left side portion 15B. More specifically, as shown in FIG. 9, the left side 15B of the roller support frame 15 is reverse-viewed in a forward view in which end portions on the downstream side of the bottom wall 19B and the ceiling wall 18B are connected by a side wall 16B. It has a letter shape, and the feed roller 30 is supported by the bottom wall 19B.

  As shown in FIG. 5, the ceiling wall 18B is formed by bending the side wall extending portion 17B extending upward from the side wall 16B to the upstream side, and a plurality of support walls in which the right end portion of the ceiling wall 18B stands up from the bottom wall 19B. Supported by 19H.

  The side wall extending portion 17B has a trapezoidal shape in which the protruding height of the rear end portion is larger than the protruding height of the front end portion. Further, a substantially rectangular notch 32 is formed at the rear end of the side wall 16B and the side wall extending portion 17B so as to straddle both the parts 16B and 17B, and the downstream side of the feed roller 30 is provided in the notch 32 in the side wall 16B. The edge is received. And when the side wall extension part 17B is bent, the upper end part of the sending-out roller 30 is received by the notch part 32 in the side wall extension part 17B. As shown in FIG. 9, the feed roller 30 is disposed at the same height as the transport roller group 20G, and the upper end of the feed roller 30 constitutes a part of the transport surface M1.

  Further, as shown in FIG. 5, in this embodiment, the right side 15A of the roller support frame 15 includes a ceiling wall 18A and a side wall 16A, and the ceiling wall 18A is a side wall extending portion 17A, like the left side 15B. Are bent downstream. Contrary to the side wall extending portion 17B, the side wall extending portion 17A has a trapezoidal shape in which the protruding height of the rear end portion is smaller than the protruding height of the front end portion.

  As shown in FIG. 2, auxiliary rollers 26 </ b> A and 26 </ b> B are provided above the transport roller group 20 </ b> G and the delivery roller 30. As shown in FIG. 3, each of the auxiliary rollers 26 </ b> A and 26 </ b> B is rotatably supported by an auxiliary roller support portion 27 that extends forward from the rear side portion 15 </ b> D of the roller support frame 15 through the upper portion of the guide wall 11. . In the cut sheet conveying apparatus 10, the auxiliary rollers 26 </ b> A and 26 </ b> B hold the cut sheet S moving on the conveying roller group 20 </ b> G and the feeding roller 30 from above, thereby preventing the conveyed cut sheet S from being lifted. Yes.

  Specifically, the auxiliary roller support portion 27 can be attached to an arbitrary position on the rear side portion 15D of the roller support frame 15, and is configured to be rotatable around an end portion on the guide wall 11 side. Thereby, the position of the auxiliary rollers 26A and 26B in the left-right direction and the direction of the rotating shaft can be adjusted. In the example shown in FIG. 3, the rotation axis of the auxiliary roller 26 </ b> A on the upstream side is arranged so as to be parallel to the rotation axis of the transport roller 20, and the auxiliary roller 26 </ b> B on the downstream side is arranged above the delivery roller 30. The rotating shaft is parallel to the rotating shaft of the feed roller 30.

  Now, in the cut sheet conveying apparatus 10 of the present embodiment, the rotation of the most downstream conveying roller 20K (corresponding to the “second conveying roller” of the present invention) arranged on the most downstream side in the conveying roller group 20G. Is provided with a rotation transmission mechanism 40 (see FIG. 6) for transmitting the toner to the feed roller 30 (which also corresponds to the “first transport roller” of the present invention). Hereinafter, the rotation transmission mechanism 40 will be described.

  As shown in FIG. 6, the rotation transmission mechanism 40 includes a transmission roller 41 arranged in parallel with the delivery roller 30 between the most downstream conveyance roller 20 </ b> K and the delivery roller 30. The transmission roller 41 has a shape in which a front portion of a cylinder extending in the front-rear direction is reduced in diameter to a substantially truncated cone shape, and a front portion and a rear portion of the transmission roller 41 are respectively larger than the small diameter contact portion 43 of the present invention. A diameter contact portion 42 is formed. The large-diameter contact portion 42 is in frictional contact with the outer peripheral surface of the feed roller 30, and the small-diameter contact portion 43 is in frictional contact with the outer peripheral surface of the most downstream conveying roller 20K.

  Specifically, as shown in an enlarged view in FIG. 7, the outer peripheral surface of the small diameter contact portion 43 has an R shape that bulges outward. Specifically, the outer peripheral surface of the small diameter contact portion 43 is an arc surface that gently bulges outward. Therefore, even if the small diameter contact portion 43 is in point contact with the most downstream conveyance roller 20K or line contact with the most downstream conveyance roller 20K, the most downstream conveyance roller 20K among the outer peripheral surfaces of the small diameter contact portion 43. Only the part in the axial direction contacts the most downstream conveying roller 20K.

  As shown in FIGS. 6 and 9, when the transport roller group 20G is driven to rotate counterclockwise when viewed from the front by the transport roller driving motor 21 (see FIG. 4), the rotation of the most downstream transport roller 20K is It is transmitted to the transmission roller 41 through the small diameter contact portion 43, and the transmission roller 41 rotates clockwise as viewed from the front. The rotation of the transmission roller 41 is transmitted to the delivery roller 30 via the large-diameter contact portion 42. As a result, the delivery roller 30 rotates counterclockwise as viewed from the front, that is, in the same direction as the most downstream conveying roller 20K. To do. Thus, in the cut sheet conveying apparatus 10 of the present embodiment, the rotation of the most downstream conveying roller 20K is transmitted to the sending roller 30 by the transmission roller 41.

  As shown in FIG. 9, the transmission roller 41 is supported by the bottom wall 19B of the left side 15B of the roller support frame 15, and the rotation axis L3 of the transmission roller 42 is the rotation axis L4 of the most downstream conveying roller 20K and the delivery roller 30. Are arranged at the same height as the rotation axis L2. Further, the large-diameter contact portion 42 of the transmission roller 41 is smaller in diameter than the conveyance roller 20 and the delivery roller 30 (see FIG. 6), and the transmission roller 41 is covered at the top by the ceiling wall 18B. Thereby, it is possible to prevent the cut sheet S from coming into contact with the transmission roller 41 that rotates in the opposite direction (clockwise in FIG. 9) to the transport roller 20 and the feed roller 30.

  Thus, in this embodiment, the ceiling wall 18B corresponds to the “roller cover” of the present invention. Here, as described above, since the ceiling wall 18B is formed by bending the side wall extending portion 17B, the roller cover can be formed integrally with the roller support frame 15. Thereby, the strength of the roller cover can be improved.

  When the transmission roller 41 is worn, the frictional contact force between the transmission roller 41 and the most downstream conveyance roller 20K or the delivery roller 30 becomes small, and the rotation of the most downstream conveyance roller 20K cannot be transmitted to the transmission roller 41. There may be a problem that the rotation of 41 cannot be transmitted to the delivery roller 30. However, in the rotation transmission mechanism 40, the above problem is solved by the transmission roller pressing means 60 that presses the transmission roller 41 against both the most downstream conveyance roller 20K and the delivery roller 30. Hereinafter, the transmission roller pressing means 60 will be described.

  As shown in FIG. 8, the transmission roller pressing means 60 supports the transmission roller 41 in a rotatable manner and urges the plate springs 61 and 61 left and right to urge them forward in the direction of the rotation axis L3. It is comprised with the leaf | plate spring support part 62 supported so that rocking | fluctuation to a direction is possible. The leaf springs 61 and 61 correspond to the “transmission roller urging means” of the present invention, and the leaf spring support portion 62 also corresponds to the “rotation support portion” of the present invention.

  The plate springs 61, 61 are arranged opposite to each other in the front-rear direction behind the transmission roller 41, and the upper ends of the plate springs 61, 61 are connected by a connecting pin 63. And the transmission roller 41 is rotatably supported by the upper end part of the leaf | plate spring 61 arrange | positioned at the front side.

  The leaf spring support portion 62 includes a support block 64 fixed to the bottom wall 19B of the roller support frame 15 and bolts 65 and 65 for fixing the lower ends of the leaf springs 61 and 61 to the support block 64. . The plate springs 61 and 61 are both attached so that the upper end portion is bent backward, and urge the transmission roller 41 forward. In FIG. 8, the amount of bending of the leaf spring 61 is exaggerated.

  Here, as shown in FIG. 9, the bolts 65, 65 are arranged on an axis L <b> 5 parallel to the rotation axis L <b> 3 of the transmission roller 41, and each bolt 65 is attached to the support block 64 only at one place of the leaf spring 61. It is fixed. The leaf springs 61 and 61 are rotatable around the axis L5 with respect to the support block 64. Thereby, the upper end part of the leaf | plate spring 61 can rock | fluctuate in the left-right direction, and the transmission roller 41 can move to the delivery roller 30 side.

  Next, the operation of the transmission roller pressing means 60 will be described. As shown in FIG. 10A, when the large diameter contact portion 42 and the small diameter contact portion 43 of the transmission roller 41 are worn, first, the transmission roller 41 is moved forward in the direction of the rotation axis L3 by the urging force of the leaf springs 61 and 61. The small diameter contact portion 43 comes into contact with the most downstream conveying roller 20K. At this time, as shown in FIG. 10B, if there is a gap between the large-diameter contact portion 42 and the delivery roller 30, the transmission roller 41 is urged by the leaf springs 61 and 61 to convey the most downstream. It moves further forward in sliding contact with the roller 20K. As a result, the transmission roller 41 moves to the delivery roller 30 side in the left-right direction, and the large diameter contact portion 42 contacts the delivery roller 30. 10A and 10B, the leaf spring 61, the connecting pin 63, and the like are omitted.

  Thus, in the transmission roller pressing means 60 of the present embodiment, the leaf spring support portion 62 supports the lower end portion of the leaf spring 61 so as to be rotatable about an axis L5 parallel to the rotation axis L3 of the transmission roller 41. Therefore, it is possible to press the transmission roller 41 to both the most downstream conveying roller 20K and the delivery roller 30 only by urging the transmission roller 41 forward in the direction of the rotation axis L3 with the leaf springs 61, 61. .

  The description regarding the configuration of the cut sheet conveyance device 10 and the rotation transmission mechanism 40 of the present embodiment has been described above. Next, operational effects of the cut sheet conveyance device 10 and the rotation transmission mechanism 40 will be described.

  In the cut sheet conveyance device 10, the conveyance roller group 20 </ b> G is rotationally driven via the belt 25 when the conveyance roller driving motor 21 rotates. The rotation of the most downstream transport roller 20K is transmitted to the delivery roller 30 by the rotation transmission mechanism 40, and both the transport roller group 20G and the delivery roller 30 rotate in the same direction.

  Then, when the cut sheet S is fed from the cut sheet feeder 80 to the cut sheet transport apparatus 10, the cut sheet S moves downstream on the transport roller group 20G (see FIG. 3). Since the rotation shaft of each conveyance roller 20 is inclined downstream with respect to the reference axis L1, the cut sheet S is shifted to the guide wall 11 side during the conveyance, and the rear side of the cut sheet S (see FIG. 3) is aligned with the front surface 11 </ b> M of the guide wall 11. The cut sheet S is sandwiched between the upstream auxiliary roller 26 and the conveyance roller 20 in the upstream portion of the cut sheet conveyance device 10 to prevent the cut sheet S from being lifted.

  When the cut sheet S is conveyed to the downstream side of the conveyance roller group 20G, the cut sheet S is sandwiched in the vertical direction by the feed roller 30 and the downstream auxiliary roller 26 and is conveyed to the downstream device 90. Here, since the delivery roller 30 is parallel to the reference axis L1, the cut sheet S can be smoothly delivered to the downstream apparatus 90.

  By the way, in order to more smoothly convey the cut sheet S to the downstream side apparatus 90, the rotation speed (conveyance speed) of the feed roller 30 may be made larger than the rotation speed (conveyance speed) of the conveyance roller group 20G. Therefore, it is conceivable to drive the delivery roller 30 and the transport roller group 20G with separate rotational drive sources, but there is a problem that the number of rotational drive sources increases. Further, in order to prevent the rotation drive source from increasing, when the rotation of the transport roller group 20G is transmitted to the delivery roller 30 using a bevel gear, the number of gears is used to make the rotational speeds of the transport roller 20 and the delivery roller 30 different. This increases the complexity of the rotation transmission mechanism.

  However, in the cut sheet conveyance device 10 of the present embodiment, the rotation transmission mechanism 40 that transmits the rotation of the most downstream conveyance roller 20K to the delivery roller 30 has an outer diameter smaller than those of the most downstream conveyance roller 20K and the delivery roller 30 and those A transmission roller 41 disposed between the rollers 20K and 30 in parallel with the feeding roller 30 is provided, and the transmission roller 41 forms a cylindrical shape and a large-diameter contact portion 42 that is in frictional contact with the feeding roller 30 and a large-diameter contact. The outer diameter is smaller than the part 43, and the small diameter contact part 43 which frictionally contacts with the most downstream conveyance roller 20K is provided. Accordingly, the rotation speed of the feed roller 30 that is in frictional contact with the large diameter contact portion 42 is larger than the rotation speed of the most downstream conveying roller 20K that is in frictional contact with the small diameter contact portion 43.

  As described above, according to the rotation transmission mechanism 40 of the present embodiment, only the transmission roller 41 is provided between the most downstream conveying roller 20K and the delivery roller 30, and the rollers 20K and 30 are driven by a common rotational drive source. However, the rotational speeds of the rollers 20K and 30 can be varied. In other words, it is possible to transmit the rotation between the most downstream conveying roller 20K and the sending roller 30 whose rotation axes intersect with each other with a simpler configuration than before, and to make the rotation speeds of the rollers 20K and 30 different. Become.

  In addition, since the small diameter contact portion 43 is connected to the large diameter contact portion 42 and has an R shape that is gradually reduced in diameter as the distance from the large diameter contact portion 42 and bulges outward, the small diameter contact portion 43. And the most downstream conveying roller 20K can be brought into point contact, and power transmission loss can be reduced.

  Further, in the present embodiment, the length of the feed roller 30 is made shorter than the length of the most downstream transport roller 20K, and the feed roller is inserted into the triangular gap 31 sandwiched between the most downstream transport roller 20K and the roller support frame 15. 30 is accommodated, the distance between the feed roller 30 and the transport roller group 20G can be reduced, and the transmission roller 41 can be reduced.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 11, the rotation transmission mechanism 40V according to the present embodiment is a modification of the rotation transmission mechanism 40 of the first embodiment, and the configuration of the transmission roller pressing means is different.

  As shown in FIG. 11, the transmission roller pressing means 70 of the rotation transmission mechanism 40 </ b> V includes a transmission roller support block 73 behind the transmission roller 41, and is sandwiched between the transmission roller support block 73 and the transmission roller 41. The transmission roller 41 is urged forward by the compression coil spring 71.

  Specifically, a roller support pin 72 is fixed to the rear end portion of the transmission roller 41, and this roller support pin 72 penetrates the inside of the compression coil spring 71 from the front, and reaches the upper end portion of the transmission roller support block 73. The formed first pin insertion hole 73A is inserted.

  The transmission roller support block 73 is supported by a block support portion 75 fixed to the bottom wall 19B of the left side portion 15B of the roller support frame 15, and can rotate about an axis L6 parallel to the rotation axis L3 of the transmission roller 41. It has become.

  Specifically, in the block support portion 75, a pair of opposed walls 75A and 75A fixed to the bottom wall 19B and opposed in the front-rear direction, and a block that passes through the pair of opposed walls 75A and 75A in the front-rear direction. A support pin 74 is provided, and the block support pin 74 passes through a second pin insertion hole 73 </ b> B formed in the lower end portion of the transmission roller support block 73. As a result, the transmission roller 41 supported by the transmission roller support block 73 can rotate around the axis L6 (see FIG. 12), and can move to the delivery roller 30 side in the left-right direction.

  This completes the description of the configuration of the transmission roller pressing means 70. About the other structure of the rotation transmission mechanism 40V of this embodiment, since it is the same as the rotation transmission mechanism 40 of the said 1st Embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol. According to the rotation transmission mechanism 40V of the present embodiment, the same effects as those of the first embodiment can be obtained.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 13, the rotation transmission mechanism 40W according to the present embodiment is a modification of the rotation transmission mechanism 40V of the second embodiment, and the configuration of the transmission roller pressing means is different.

  As shown in FIG. 13, the transmission roller pressing means 170 of the rotation transmission mechanism 40 </ b> W includes a transmission roller support block 173 behind the transmission roller 41 as in the second embodiment, and a rear end portion of the transmission roller 41. The fixed roller support pin 72 passes through the compression coil spring 71 and passes through the first pin insertion hole 173A formed in the upper end portion of the transmission roller support block 173. The transmission roller 41 is urged forward by a compression coil spring 71 sandwiched between the transmission roller support block 173 and the transmission roller 41.

  As shown in FIG. 14, a guide groove 173M extending in the left-right direction is provided on the bottom surface of the transmission roller support block 173, and a guide rail 178 protruding from the bottom wall 19B is received in the guide groove 173M.

  Further, an upright wall 175 protruding upward from the bottom wall 19 is provided on the side of the transmission roller support block 173 (on the right side in FIG. 14), and the downstream side (transmission roller support block 173 side) of the upright wall 175 is provided. A block support pin 176 extends. The block support pin 176 passes through the second compression coil spring 179 and passes through a second pin insertion hole 173B formed in the lower end portion of the transmission roller support block 173. Thereby, the transmission roller support block 173 is urged to the downstream side, and the transmission roller 41 is urged to the delivery roller 30 side.

  This completes the description of the configuration of the transmission roller pressing means 170. Since the other configuration of the rotation transmission mechanism 40W of the present embodiment is the same as that of the rotation transmission mechanisms 440 and 40V of the first and second embodiments, description thereof will be omitted by attaching the same reference numerals. According to the rotation transmission mechanism 40W of the present embodiment, the same effects as those of the first and second embodiments can be obtained.

[Fourth Embodiment]
Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 15, the cut sheet conveyance device 110 of the present embodiment is a modification of the cut sheet conveyance device 10 of the first embodiment, and has the same diameter as the conveyance roller 20 on the upstream side of the conveyance roller group 20G. In addition, a pull-in roller 35 having a rotation axis L7 parallel to the reference axis L1 perpendicular to the guide wall 11 is provided. That is, the drawing roller 35 is adjacent to the most upstream conveying roller 20J disposed in the most upstream of the conveying roller group 20G, and the rotation axis L8 of the most upstream conveying roller 20J is downstream of the rotation axis L7 of the drawing roller 35. It is inclined to.

  The pull-in roller 35 has an axial length that is substantially the same as that of the transport roller 20, is disposed outside the right side 15 </ b> A of the roller support frame 15, and is rotatably supported by the right side 15 </ b> A. Specifically, in the right side portion 15A of the roller support frame 15 of the present embodiment, the end portions on the upstream side of the bottom wall 19A (see FIG. 16) and the ceiling wall 18A communicate with each other through the side wall 16A in the same manner as the left side portion 15B. The U-shaped front view is formed, and the drawing roller 35 is supported by the bottom wall 19A.

  In the cut sheet conveyance device 110 according to the present embodiment, the rotation transmission mechanism 40 described in the first embodiment is also applied to the rotation transmission mechanism for transmitting the rotation of the most upstream conveyance roller 20J to the drawing roller 35. Yes.

  Specifically, as shown in FIG. 16, the transmission roller 41 has a rotation axis L9 between the most upstream conveying roller 20J and the drawing roller 35 so that its rotation axis L9 is parallel to the rotation axis L8 of the most upstream conveying roller 20J. Is arranged. The large diameter contact portion 42 is in frictional contact with the most upstream conveying roller 20J, and the small diameter contact portion 43 is in frictional contact with the drawing roller 35. Accordingly, the rotational speed of the drawing roller 35 is smaller than the rotational speed of the most upstream conveying roller 20J (conveying roller 20). In the rotation transmission mechanism 40, the most upstream conveying roller 20J corresponds to the “first conveying roller” of the present invention, and the drawing roller 35 corresponds to the “second conveying roller” of the present invention.

  The above is the description of the rotation transmission mechanism between the most upstream conveying roller 20J and the drawing roller 35. Since the configuration of the other parts of the cut sheet conveying device 110 is the same as that of the cut sheet conveying apparatus 10 of the first embodiment, description thereof is omitted by attaching the same reference numerals.

  Next, the function and effect of the cut sheet conveyance device 110 of this embodiment will be described. In the cut sheet conveying device 110, when the cut sheet S is fed from the cut sheet feeder 80, the cut sheet S is first drawn into the cut sheet conveying apparatus 110 by the drawing roller 35 and the upstream conveying roller 20. (See FIG. 15). Here, in the present embodiment, the rotation transmission mechanism 40 provided on the upstream side causes the rotation speed of the most upstream conveyance roller 20J to be higher than the rotation speed of the drawing roller 35. It is possible to smoothly draw in the group 20.

  When the cut sheet S is drawn, it moves on the transport roller group 20G and is transported to the downstream apparatus 90 by the feed roller 30. As described in the first embodiment, the rotational speed of the delivery roller 30 is higher than that of the most downstream transport roller 20K by the downstream side rotation transmission mechanism 40, so that the cut sheet S is transferred to the downstream side device 90. Can be sent out smoothly.

  As described above, according to the cut sheet conveying device 110 of the present embodiment, the same effects as those of the first embodiment can be obtained, and the drawing of the cut sheet S from the cut sheet feeder 80 can be smoothly performed. .

[Fifth Embodiment]
Hereinafter, a fifth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the rotation transmission mechanism 40 described in the first embodiment is applied to a curve conveyor. Specifically, as shown in FIG. 17, the curve conveyor 100 according to the present embodiment includes a plurality of conveying rollers 20 arranged in an arc shape on the upper portion, and the rotation axes of the adjacent conveying rollers 20, 20 intersect each other. (Refer to the rotation axes L10 and L11 in FIG. 18). Then, a conveyance surface 101 curved in an arc shape is formed on the conveyance roller group 20G, and the curve conveyor 100 moves the conveyance object A fed from the feeding device 180 on the conveyance surface 101 to thereby form a downstream device. Send to 190.

  Below the conveyance roller group 20G, a belt 102 is stretched along an arc of the conveyance surface 101, and the belt 102 is driven by a conveyance roller driving motor 103 so that the first downstream disposed at the most downstream side. The plurality of transport rollers 20 except the transport roller 20L rotate in the same direction.

  Then, as shown in FIG. 18, the first downstream transport roller 20L (corresponding to the “first transport roller” of the present invention) and the second downstream transport located one upstream of the first downstream transport roller 20L. A rotation drive mechanism 40 is provided between the roller 20M (corresponding to the “second conveyance roller” of the present invention), and the rotation of the second downstream conveyance roller 20M is transmitted to the first downstream conveyance roller 20L. It is like that.

  Specifically, in the rotation transmission mechanism 40 of the present embodiment, as shown in FIG. 18, the transmission roller 41 has a rotation axis L12 between the first downstream conveyance roller 20L and the second downstream conveyance roller 20M. It arrange | positions so that it may become parallel to the rotating shaft L10 of the 1st downstream conveyance roller 20L. The large diameter contact portion 42 is in frictional contact with the first downstream conveyance roller 20L, and the small diameter contact portion 43 is in frictional contact with the second downstream conveyance roller 20M. Accordingly, the rotational speed of the first downstream transport roller 20L is higher than the rotational speed of the second downstream transport roller 20M.

  As shown in FIG. 17, a roller cover 105 is provided between the first downstream conveyance roller 20 </ b> L and the second downstream conveyance roller 20 </ b> M so as to cover the transmission roller 41. The transmission roller 41 that rotates in the direction is not in contact with the conveyed product A.

  The description regarding the curve conveyor 100 and the rotation transmission mechanism 40 of this embodiment is above. According to this embodiment, the same effect as the first embodiment can be obtained.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

(1) In the above embodiment, the small-diameter contact portion 43 of the transmission roller 41 has a substantially truncated cone shape. However, as shown in FIG. As shown, it may be hemispherical.

(2) As shown in FIG. 19C, the entire transmission roller 41 is formed in a dumbbell shape, and a portion on the rear side of the dumbbell intermediate shaft portion 44 is formed in a columnar shape to form a large-diameter contact portion 42. Alternatively, the small diameter contact portion 43 may be formed by making the portion on the front side of the intermediate shaft portion 44 into a spherical shape having a smaller diameter than the outer diameter of the large diameter contact portion 42.

(3) As shown in FIGS. 20 (A) to 20 (C), the shape of the small diameter contact portion 43 in the configuration of (2) is the same as the shape of the small diameter contact portion of the above embodiment (that is, a substantially truncated cone shape). ) Or the shape of the small-diameter contact portion shown in (1) above (that is, substantially conical or hemispherical).

  (4) In the first to third embodiments, the length of the feed roller 30 is smaller than the length of the transport roller 20, but may be equal to or longer than the length of the transport roller 20. In addition, according to the said 1st-3rd embodiment, the space | interval of the sending roller 30 and the conveyance roller group 20G can be made small, and the transmission roller 30 can be made small.

  (5) In the first to fourth embodiments, the example in which the rotation transmission mechanism of the present invention is applied to the cut paper transporting device 10 that transports the cut paper S with one side aligned is shown. You may apply to the conveying apparatus which arranges and conveys one side of this conveyed product.

  (6) In the fourth and fifth embodiments, the rotation transmission mechanism 40 may be replaced with the rotation transmission mechanisms 40V and 40W of the second and third embodiments. That is, in the fourth and fifth embodiments, the transmission roller pressing means 60 may be replaced with the transmission roller pressing means 70 and 170.

  (7) In the fourth embodiment, the rotation transmission mechanism 40 may be provided only between the drawing roller 35 and the most upstream conveying roller 20J.

10, 110 Cut paper transport device 11 Guide wall 15 Roller support frame 17B Side wall extension 18B Ceiling wall (roller cover)
20 transport roller 20G transport roller group 20J most upstream transport roller (first transport roller)
20K most downstream transport roller (second transport roller)
20L 1st downstream conveyance roller (1st conveyance roller)
20M Second downstream transport roller (second transport roller)
21 Transport roller drive motor (rotation drive source)
30 Delivery roller (first transport roller)
35 Pull-in roller (second transport roller)
40, 40 V, 40 W Rotation transmission mechanism 41 Transmission roller 42 Large diameter contact portion 43 Small diameter contact portion 60, 70, 170 Transmission roller pressing means 61 Leaf spring (transmission roller biasing means)
62 Leaf spring support (rotation support)
S cut paper

Claims (8)

Rotational power is transmitted between a first transport roller and a second transport roller that are arranged adjacent to each other in the transport direction so as to intersect with each other among a plurality of transport rollers that form a transport surface. In the rotation transmission mechanism that
An outer diameter smaller than that of the first conveying roller and the second conveying roller, and a transmission roller disposed in parallel with the first conveying roller between the first conveying roller and the second conveying roller,
The transmission roller has a cylindrical large-diameter contact portion that is in frictional contact with the first conveyance roller, and a side on which the gap between the first conveyance roller and the second conveyance roller is narrower than the large-diameter contact portion. A rotation transmission mechanism comprising a small-diameter contact portion that is disposed and has an outer diameter smaller than that of the large-diameter contact portion and that makes frictional contact with the second transport roller.   The said small diameter contact part is connected to the said large diameter contact part, and makes the R shape gradually diameter-reduced and bulging outside as it leaves | separates from the said large diameter contact part. Rotation transmission mechanism.   The rotation transmission mechanism according to claim 1, further comprising a transmission roller pressing unit that presses the transmission roller against both the first conveyance roller and the second conveyance roller.   The transmission roller pressing means is a transmission roller urging means for urging the transmission roller toward the second conveyance roller in the axial direction of the transmission roller, and the transmission roller is rotated about an axis parallel to the transmission roller. The rotation transmission mechanism according to claim 3, wherein the rotation transmission mechanism is configured by a rotation support portion that supports the transmission roller and allows the transmission roller to move toward the first conveyance roller. The transmission roller urging means is a leaf spring that rotatably supports the transmission roller at a tip portion and urges the transmission roller in the axial direction of the transmission roller toward the second conveyance roller.
5. The rotation transmission mechanism according to claim 4, wherein the rotation support portion is a plate spring support portion that supports a base end portion of the plate spring so as to be rotatable about an axis parallel to the transmission roller. A guide wall is provided that extends laterally on the side of a group of conveyance rollers formed side by side with a plurality of conveyance rollers, and the rotation axis of the conveyance roller is inclined downstream with respect to an axis orthogonal to the guide wall. A cut sheet conveying apparatus that arranges and conveys one side of a square cut sheet on the guide wall,
Provided on the downstream side of the transport roller group is a delivery roller having a rotation axis orthogonal to the guide wall;
The rotation transmission mechanism according to any one of claims 1 to 5 is provided as a rotation transmission mechanism between the most downstream conveyance roller located on the most downstream side in the conveyance roller group and the delivery roller. The cut sheet conveying apparatus, wherein the large diameter contact portion is brought into frictional contact with the feeding roller, and the small diameter contact portion is brought into friction contact with the most downstream conveying roller. A roller support frame that surrounds the four sides of the plurality of transport rollers and rotatably supports the rollers;
The length of the delivery roller is shorter than that of the most downstream conveyance roller, and the delivery roller is housed in a triangular gap sandwiched between the roller support frame and the most downstream conveyance roller. 6. The cut sheet conveying device according to 6.   8. The cut according to claim 7, further comprising a roller cover which is formed by bending a side wall extending portion extending upward from a downstream side wall of the roller support frame to cover the transmission roller from above. Paper transport device.

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