JP2013227816A - Support roller of slide door, and roller unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support roller secured in durability and improved in shock absorptivity, and a roller unit.SOLUTION: A support roller 30 includes a ball bearing 31 and a jacket 35 covering the outer periphery of the ball bearing 31. The jacket 35 has a first jacket part 36 extending in a circumferential direction along the outer peripheral surface of the ball bearing 31 and a second jacket part 37 extending in a circumferential direction along the outer peripheral surface of the first jacket part 36. The second jacket part 37 is formed of a material which is harder than that of the first jacket part 36. The first jacket part 36 and the second jacket part 37 are recess-projection fitted to each other. A fitting part extending in the circumferential direction is formed on the outer peripheral surface of the first jacket part 36, and the second jacket part 37 is fitted to the fitting part of the first jacket part 36. A fitting part extending in the circumferential direction is formed on the outer peripheral surface of the ball bearing 31, and the first jacket part 36 is fitted to the fitting part of the ball bearing 31.

Description

  The present invention relates to a support roller for a slide door, and more particularly to a support roller and a roller unit that can absorb an impact received from a rolling surface during rolling.

  Conventionally, as described in, for example, Patent Document 1 and Patent Document 2 below, a support roller that supports a slide door is known. The support roller includes a ball bearing that is assembled to a support shaft provided on the slide door and rotates around the support shaft when the door is opened and closed. The outer periphery of the ball bearing is covered with a synthetic resin outer skin. The impact received from the rolling surface when the support roller rolls is absorbed by the synthetic resin outer skin. Thereby, the vibration of the door main body at the time of door opening / closing operation is suppressed, and the quietness at the time of opening / closing the sliding door is improved.

JP-A-8-276743 JP-A-11-334369

  The outer skin of the conventional support roller is made of a hard synthetic resin in order to ensure durability such as load resistance, creep characteristics, and wear resistance. Therefore, the impact absorption of the conventional support roller is not sufficient, and it is necessary to further improve the quietness when the sliding door is opened and closed.

  The present invention has been made to cope with the above-described problems, and an object of the present invention is to provide a support roller and a roller unit that ensure durability and improve shock absorption. In addition, in the description of each constituent element of the present invention below, in order to facilitate understanding of the present invention, reference numerals of corresponding portions of the embodiment are described in parentheses, but each constituent element of the present invention is The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the embodiments.

  In order to achieve the above object, a feature of the present invention is that it is assembled to a support shaft (22) provided on a slide door (13) of a vehicle to support the slide door and around the support shaft when the slide door is opened and closed. A support roller (30, 40, 40A) that rotates and smoothly opens and closes the slide door, and is a bearing member (31, 41) assembled to the support shaft, and a skin member (35 that covers the outer periphery of the bearing member) , 45, 45A), and the outer skin member has a first outer skin portion (36, 46) extending in the circumferential direction along the outer peripheral surface of the bearing member and a peripheral surface along the outer peripheral surface of the first outer skin portion. 2nd skin part (37, 47) extended in the direction, the 2nd skin part is formed with a material harder than the 1st skin part, and the 1st skin part and the 2nd skin part are uneven It is in fitting.

  A feature of the present invention is a roller unit (20) that supports a slide door of a vehicle so as to be movable along a slide rail provided in the vehicle main body, and is assembled to the support shaft and the support shaft. A support roller that rotates around the support shaft when the slide door is opened and closed to facilitate the opening and closing operation of the slide door. The support roller includes a bearing member that is assembled to the support shaft, and a skin member that covers the outer periphery of the bearing member. The outer skin member includes a first outer skin portion extending in the circumferential direction along the outer peripheral surface of the bearing member, and a second outer skin portion extending in the circumferential direction along the outer peripheral surface of the first outer skin portion. The second skin part is formed of a material harder than the first skin part, and the first skin part and the second skin part are in an uneven fit.

  According to the support roller and the roller unit configured as described above, when a load in the radial direction (a direction perpendicular to the rotation center axis direction) acts on the outer peripheral surface of the second outer skin portion, the load causes the second outer skin portion to move. Is transmitted to the first outer skin portion, and the first outer skin portion is slightly deformed. Since the first outer skin portion is formed of a softer material than the second outer skin portion, the first outer skin portion absorbs the impact received from the rolling surface at the time of rolling, and the vibration of the support roller itself, the vibration of the door body, and the vibrations thereof. Generation of sound can be suppressed. Further, since the second outer skin portion is formed of a material harder than the first outer skin portion, the first outer skin portion can be protected, and the load resistance, creep characteristics, wear resistance, etc. of the support roller can be protected. Durability can be ensured. Therefore, according to the present invention, it is possible to ensure durability such as load resistance, creep characteristics, and wear resistance of the support roller, and to improve quietness when the sliding door is opened and closed.

  In addition, since the first outer skin part and the second outer skin part are concavo-convexly fitted, it is possible to prevent the first outer skin part and the second outer skin part from shifting due to the load acting on the outer peripheral surface of the second outer skin part. .

  Another feature of the present invention is that a fitting portion (36e, 46e) including one or both of a groove portion and a protruding portion extending in the circumferential direction is formed on the outer peripheral surface of the first outer skin portion, and the second outer skin portion is formed. The part is that it is fitted in the fitting part of the first outer skin part.

  In a sliding door of a vehicle, when the door is opened and closed, the door body moves not only in the vehicle front-rear direction but also in the vehicle width direction. Specifically, when the door is opened, it is pushed out of the passenger compartment, and conversely, when the door is closed, it is drawn into the passenger compartment. Therefore, a load acts on the outer peripheral surface of the support roller in the thrust direction (direction parallel to the rotation center axis direction). Thus, even if a load acts on the outer peripheral surface of the support roller in the thrust direction, according to the present invention, the second outer skin portion is fitted in the circumferentially extending fitting portion provided on the outer periphery of the first outer skin portion. Can be prevented from shifting in the thrust direction with respect to the first outer skin portion.

  In addition, another feature of the present invention is that a fitting portion (33a, 43a) including one or both of a groove portion and a protruding portion extending in the circumferential direction is formed on the outer peripheral surface of the bearing member. It is in being fitted to the fitting part of the bearing member.

  According to this, even if a load acts on the outer circumferential surface of the outer skin member in the thrust direction, the first outer skin portion is fitted to the circumferentially extending fitting portion provided on the outer circumferential surface of the bearing member. Therefore, it is possible to prevent the outer skin member from shifting in the thrust direction with respect to the bearing member.

  Another feature of the present invention is that the distance from the innermost portion (37a, 47c) of the inner peripheral surface of the second outer skin portion to the rotation center axis (CA) of the bearing member is the outer periphery of the bearing member. The distance is smaller than the distance from the outermost portion of the surface to the rotation center axis of the bearing member. In the present invention, the inner side is the inner side in the radial direction of the support roller, that is, the side close to the rotation center axis of the support roller, and the outer side is the outer side in the radial direction of the support roller, that is, the rotation center axis of the support roller. On the far side.

  According to this, at least a part of the orthogonal projection of the second outer skin portion onto the plane perpendicular to the thrust direction overlaps with the orthogonal projection of the bearing member onto the plane. That is, the second outer skin portion is fitted in the fitting portion of the bearing member. Therefore, even if a load acts on the outer peripheral surface of the outer skin member in the thrust direction and the first outer skin portion is deformed, it is possible to prevent the second outer skin portion from being largely displaced in the thrust direction with respect to the bearing member.

  Another feature of the present invention resides in that the rotation center axis direction end portions (37b, 47b) of the second outer skin portion are in contact with the rotation center axis direction end portion of the bearing member.

  According to this, since the edge part in the rotation center axis direction (thrust direction) of the 2nd outer skin part formed with the material harder than the 1st outer skin part is comprised so that it may contact | abut to a bearing member, a sliding door This load mainly acts on the second skin portion, not the first skin portion. Therefore, the first skin portion is hardly deformed by the load (static load) of the slide door, and is deformed mainly by the impact (dynamic load) received from the rolling surface when the support roller rolls. Thereby, the load resistance of the support roller, creep characteristics, etc. can be improved.

  Another feature of the present invention is that the fitting portion of the first outer skin portion has a protruding portion (46a1) extending in the circumferential direction, and the protruding height of the protruding portion constituting the fitting portion of the first outer skin portion. However, it is different depending on the circumferential position where the protrusion is provided.

  According to this, even if a load acts on the outer periphery of the second outer skin part in the circumferential direction, the protrusion height of the protrusion provided on the outer periphery of the first outer skin part varies depending on the position in the circumferential direction. Therefore, it can prevent that the 2nd outer skin part shifts to the peripheral direction to the 1st outer skin part.

  Another feature of the present invention is that the fitting portion of the first skin portion has a groove portion extending in the circumferential direction, and the depth of the groove portion constituting the fitting portion of the first skin portion is provided by the groove portion. It is different depending on the circumferential position.

  According to this, even if a load acts on the outer periphery of the second outer skin portion in the circumferential direction, the depth of the groove portion provided on the outer periphery of the first outer skin portion is different depending on the position in the circumferential direction. Therefore, it can prevent that the 2nd outer skin part shifts to the peripheral direction to the 1st outer skin part.

It is the schematic which shows the outline of the sliding door of the vehicle to which the support roller which concerns on one Embodiment of this invention was applied. It is AA sectional drawing of FIG. It is a perspective view of a roller unit. It is sectional drawing which cut | disconnected the support roller which concerns on 1st Embodiment of this invention by the plane containing a rotation center axis line. It is the enlarged view to which the part of the outer ring | wheel of FIG. 4 was expanded. It is the enlarged view to which the part of the 1st outer skin part of FIG. 4 was expanded. It is the enlarged view to which the part of the 2nd outer skin part of FIG. 4 was expanded. It is sectional drawing which cut | disconnected the support roller which concerns on 2nd Embodiment of this invention by the plane containing a rotation center axis line. It is the enlarged view to which the part of the outer ring | wheel of FIG. 8 was expanded. It is the enlarged view to which the part of the 1st outer skin part of FIG. 8 was expanded. It is sectional drawing which equally divided the support roller which concerns on 2nd Embodiment of this invention into the plane perpendicular | vertical to a rotation center axis line. It is the enlarged view to which the part of the 2nd outer skin part of FIG. 8 was expanded. It is sectional drawing which cut | disconnected the support roller which concerns on the modification of this invention by the plane containing a rotation center axis line.

(First embodiment)
A support roller 30 according to an embodiment of the present invention will be described. First, an outline of a vehicle to which the support roller 30 is applied will be described. As shown in FIG. 1, an entrance 11 is formed at a side portion of the vehicle main body 10. Rails 12 extend in the vehicle front-rear direction along the upper and lower edges of the entrance 11. Further, a rail 12 extends in the vehicle front-rear direction near the center of the vehicle height direction behind the entrance 11. The slide door 13 is supported by the rails 12 via the roller units 20, and is configured to be movable in the vehicle front-rear direction along the rails 12.

  As shown in FIG. 2, the rail 12 includes a vertical wall portion 12a, an upper wall portion 12b, a vertical wall portion 12c, and a lower wall portion 12d. The vertical wall portion 12a extends in the vehicle longitudinal direction and the vehicle vertical direction. The lower portion of the vertical wall portion 12a in the vehicle vertical direction is formed so as to protrude toward the vehicle main body portion 10, and the protruding portion is joined to the vehicle main body portion 10 using the bolts BT and nuts NT, whereby the rail 12 Is assembled to the vehicle body 10. The upper wall portion 12b extends horizontally from the upper end of the vertical wall portion 12a to the slide door 13 side. The vertical wall portion 12c extends vertically downward from the end portion of the upper wall portion 12b on the slide door 13 side. The lower wall portion 12d extends horizontally from the lower end of the vertical wall portion 12a to the slide door 13 side. A gap D1 is formed between the lower end of the vertical wall portion 12c and the lower wall portion 12d. The rear part of the vertical wall part 12a, the upper wall part 12b, the vertical wall part 12c and the lower wall part 12d is formed linearly in the vehicle front-rear direction, and the front part extends from the intermediate part. It is formed so as to be bent so as to slightly enter the vehicle interior side. That is, the rail 12 includes a straight portion that linearly extends in the vehicle front-rear direction and a lead-in portion that curves from the front end of the straight portion toward the vehicle interior. The rail 12 is covered with a cover member CV. However, a gap D <b> 2 is provided between the lower end portion of the cover member CV and the vehicle main body portion 10. The end of the roller unit 20 on the vehicle main body 10 side enters the space S formed between the cover member CV and the vehicle main body 10 through the gap D2.

  As shown in FIG. 3, the roller unit 20 includes a pedestal 21 assembled to the slide door 13, a horizontal support shaft 22 extending horizontally from the pedestal 21 toward the vehicle main body 10, and the pedestal 21 on the vehicle main body 10 side. It consists of vertical support shafts 23, 23 extending vertically upward from the end, horizontal support shaft 22, and support rollers 30 rotatably assembled to the vertical support shafts 23, 23. The pedestal 21 includes a lower wall portion 21a that extends in the vehicle width direction, a vertical wall portion 21b that extends vertically upward from the rear end of the lower wall portion 21a in the vehicle width direction, and a vertical wall portion 21b. An upper wall portion 21c that extends horizontally forward from the upper end, a vertical wall portion 21d that extends vertically upward from an end of the lower wall portion 21a in the vehicle width direction, and a front portion of the vertical wall portion 21d And horizontal wall portions 21e, 21e extending horizontally from the upper end of the rear portion toward the vehicle main body 10 side. The outer portion of the lower wall portion 21a in the vehicle width direction is formed horizontally. On the other hand, the vehicle width direction inner side portion of the lower wall portion 21a is curved so as to be able to enter the space S from the gap D2. The lower wall portion 21a and the upper wall portion 21c are respectively provided with a through hole H1 and a through hole H2 that penetrate between the upper and lower surfaces. The central axes of the through hole H1 and the through hole H2 are common. The pin PN is inserted into the through hole H1 and the through hole H2.

  Further, as shown in FIG. 2, a bracket BR is assembled to the inner surface of the slide door 13 in the vehicle width direction. The bracket BR is assembled to the base 21 via the pin PN inserted into the through hole H1 and the through hole H2. Therefore, the slide door 13 can be rotated around the axis of the pin PN via the bracket BR. The horizontal support shaft 22 is assembled to the vertical wall 21d, and the vertical support shafts 23 and 23 are assembled to the horizontal wall portions 21e and 21e, respectively. The horizontal support shaft 22 and the vertical support shafts 23, 23 are inserted into the rail 12 through the gap D1.

  The support roller 30 assembled to the horizontal support shaft 22 is configured to support the slide door 13 and to roll on the upper surface of the lower wall portion 12d, that is, on the rolling surface in the vehicle front-rear direction. The support rollers 30 assembled to the vertical support shafts 23 and 23 are guided by the vertical wall portion 12a and the vertical wall portion 12c, and move in the vehicle front-rear direction and the vehicle width direction. When the roller unit 20 is located at the rear end of the linear portion of the rail 12, the slide door 13 is fully opened, and when the roller unit 20 is located at the front end of the retracting portion of the rail 12, the slide door 13 is fully opened. Closed. When the slide door 13 is opened from the fully closed state, the roller unit 20 moves rearward along the curved pull-in portion as described above, so that the slide door 13 is pushed out of the vehicle compartment. On the other hand, when the slide door 13 is closed from the fully open state, the roller unit 20 moves forward along the curved lead-in portion as described above, so that the slide door 13 is drawn into the vehicle interior side. When the roller unit 20 moves along the linear portion of the rail 12, the slide door 13 moves in parallel to the side surface of the vehicle main body portion 10. Further, as described above, the slide door 13 is configured to be rotatable around the axis of the pin PN, and even when the roller unit 20 moves along the retracting portion of the rail 12, the slide door 13 is configured. Is configured to be movable in parallel with the side surface of the vehicle main body 10.

  As shown in FIG. 4, the support roller 30 includes a metal ball bearing 31 and a resin outer shell 35 provided integrally on the outer periphery of the ball bearing 31. The ball bearing 31 has an inner ring 32 and an outer ring 33. The rotation center axis CA of the support roller 30 coincides with the rotation center axes of the inner ring 32 and the outer ring 33. The tip of the horizontal support shaft 22 or the vertical support shaft 23 is inserted into the inner ring 32, and the support roller 30 is assembled to the horizontal support shaft 22 or the vertical support shaft 23.

  The outer ring 33 is rotatably mounted on the outer periphery of the inner ring 32 via a metal ball BA. A seal member 34 is mounted between the inner ring 32 and the outer ring 33 to prevent foreign matter from entering between the inner ring 32 and the outer ring 33 and to prevent leakage of lubricant applied between the inner ring 32 and the outer ring 33. It is preventing. As shown in FIG. 5, a groove portion 33 a is formed along the outer periphery of the outer ring 33 at the center portion in the thrust direction (rotation center axis direction) on the outer peripheral surface of the outer ring 33. In the cross section including the rotation center axis CA of the support roller 30 as shown in FIG. 4, the bottom 33 a 1 of the groove 33 a is parallel to the thrust direction, and the side wall 33 a 2 of the groove 33 a is directed outward in the radial direction of the outer ring 33. Curved in a convex shape.

  The outer skin 35 includes a first outer skin portion 36 made of elastomer and a second outer skin portion 37 made of nylon. That is, the second skin portion 37 is formed of a material harder than the first skin portion 36. The first outer skin portion 36 is formed in an annular shape along the outer peripheral surface of the outer ring 33 and covers the periphery of the intermediate portion in the thrust direction of the outer ring 33. Specifically, as shown in FIG. 6, the first skin portion 36 is formed continuously from the inner plate portion 36 a that contacts the bottom portion 33 a 1 of the groove portion 33 a and both ends in the thrust direction of the inner plate portion 36 a, and the side wall of the groove portion 33 a. The side plate portions 36b and 36b that are in contact with the portions 33a2 and 33a2 and the end portions in the thrust direction of the side plate portions 36b and 36b are formed continuously, and are located at both ends in the thrust direction of the outer ring 33 and adjacent to the groove portion 33a. It consists of the outer plate parts 36c and 36c which touch. In the present embodiment, the inner plate portion 36a, the side plate portions 36b and 36b, and the outer plate portions 36c and 36c have the same thickness, but may not be the same. A thrust portion 36 d that protrudes toward the outer ring 33 side and extends in the circumferential direction is formed at the center portion in the thrust direction on the inner peripheral surface side of the first outer skin portion 36, and the protrusion portion 36 d is formed in the groove portion 33 a of the outer ring 33. It is mated. In addition, a groove portion 36e that is recessed toward the outer ring 33 side and extends in the circumferential direction is formed in the central portion in the thrust direction on the outer peripheral surface side of the first outer skin portion 36.

  As shown in FIG. 7, the second outer skin portion 37 is formed in an annular shape along the outer peripheral surface of the first outer skin portion 36 and the outer peripheral surfaces of both ends in the thrust direction of the outer ring 33, and the first outer skin portion 36 and the outer ring 33. Covering the surroundings. That is, the central portion in the thrust direction on the inner peripheral surface side of the second skin portion 37 is formed with a protrusion portion 37a that protrudes toward the first skin portion 36 and extends in the circumferential direction. The first outer skin portion 36 is fitted in the groove portion 36 e and the first outer skin portion 36 is fitted in the groove portion 33 a of the outer ring 33. That is, the tip of the protruding portion 37 a is configured to enter the groove portion 33 a via the first outer skin portion 36.

  At both ends in the thrust direction of the second outer skin portion 37, projecting portions 37b and 37b projecting toward the outer ring 33 are formed. The protrusions 37b and 37b are in contact with the outer peripheral surfaces of both ends of the outer ring 33 in the thrust direction. Thereby, the thrust direction end surfaces of the outer plate portions 36c, 36c of the first outer skin portion 36 are covered with the protruding portions 37b, 37b. Therefore, the outer periphery of the first skin portion 36 is covered with the second skin portion 37. Further, the central portion in the thrust direction of the outer peripheral surface of the second outer skin portion 37 is slightly curved so as to be positioned on the radially outer side than both end portions in the thrust direction.

  As described above, the outer skin 35 includes the first outer skin portion 36 and the second outer skin portion 37 that covers the outer periphery of the first outer skin portion 36. Accordingly, when the sliding roller 13 is opened and closed, the support roller 30 rolls on the rail 12, and when the radial action is applied to the outer peripheral surface of the second skin portion 37 by this rolling, the second skin portion 37 is slightly deformed. As a result, the first skin portion 36 is also slightly deformed. Since the first outer skin portion 36 is made of an elastomer having excellent shock absorption, it can sufficiently absorb the impact received from the rolling surface during rolling. Therefore, it is possible to suppress the vibration of the support roller 30 itself, the vibration of the slide door 13, and the generation of these vibration sounds. Further, since the second skin portion 37 is made of nylon that is harder and more durable than the first skin portion 36, the first skin portion 36 can be protected. Therefore, according to the support roller 30 of the present embodiment, it is possible to ensure durability such as load resistance, creep characteristics, and wear resistance, and to improve the quietness when the sliding door 13 is opened and closed.

  Further, as described above, since the retracting portion of the rail 12 is curved, when the roller unit 20 moves along the retracting portion of the rail 12, the outer peripheral surface of the support roller 30 assembled to the horizontal support shaft 22 is provided. The load acts in the thrust direction. Thus, even if a load acts on the outer peripheral surface of the support roller 30 in the thrust direction, the protrusion 37a is fitted in the groove 36e, and the protrusion 37b of the second outer skin 37 is the first outer skin. Since they are in contact with both end faces of 36, it is possible to prevent the second outer skin portion 37 from being displaced in the thrust direction with respect to the first outer skin portion 36.

  In some cases, the sliding door 13 is configured such that the sliding door 13 has a different inclination angle with respect to the vehicle main body when viewed from the front-rear direction of the vehicle, depending on whether the sliding door 13 is fully open or fully closed. In this case, the axes of the vertical support shafts 23 and 23 are inclined with respect to the vertical wall portion 12a and the vertical wall portion 12c, and the outer peripheral surface of the support roller 30 assembled to the vertical support shafts 23 and 23 is in the thrust direction. A load acts. However, also in this case, since the protruding portion 37a is fitted in the groove portion 36e, the second outer skin portion 37 can be prevented from shifting in the thrust direction with respect to the first outer skin portion 36.

  Further, a groove portion 33 a extending in the circumferential direction is provided in the central portion in the thrust direction of the outer peripheral surface of the outer ring 33, and a protruding portion 36 d extending in the circumferential direction is provided in the central portion in the thrust direction of the inner peripheral surface of the first outer skin portion 36. Is provided. And the protrusion part 36d is fitted in the groove part 33a. Further, a groove portion 36e extending in the circumferential direction is provided in the central portion in the thrust direction on the outer peripheral surface of the first outer skin portion 36, and a protrusion extending in the circumferential direction is provided in the central portion in the thrust direction on the inner peripheral surface of the second outer skin portion 37. A portion 37d is provided. And the protrusion part 37d is fitted in the groove part 36e. Further, the protruding portion 37 a is fitted in the groove portion 33 a through the first outer skin portion 36. That is, the distance in the radial direction from the innermost circumferential surface of the second outer skin portion 37 (projecting portion 37 a) to the rotation center axis CA is the outermost radial outermost surface of the outer ring 33. It is comprised so that it may become shorter than the distance in the radial direction from the part located in (in the thrust direction both ends part of the outer ring | wheel 33) to rotation center axis line CA.

  When the support roller 30 is configured as described above, at least part of the orthogonal projection of the second outer skin portion 37 on the plane perpendicular to the thrust direction overlaps the orthogonal projection of the outer ring 33 on the plane. Therefore, even if the second outer skin portion 37 tries to move in the thrust direction with respect to the outer ring 33, the protrusion 37 a interferes with the side wall portion 33 a 2 of the outer ring 33, so that the relative movement of the second outer skin portion 37 is restricted. Therefore, even if a load acts on the outer peripheral surface of the support roller 30 in the thrust direction and the first outer skin portion 36 is deformed, the second outer skin portion 37 is prevented from being greatly displaced in the thrust direction.

  In addition, since the projecting portions 37b of the second outer skin portion 37 made of a material harder than the first outer skin portion 36 are configured to abut against both end portions in the thrust direction of the outer ring 33, the load on the slide door 13 is horizontal. The support roller 30 assembled to the support shaft 22 mainly acts on the protruding portion 37b of the second outer skin portion 37, not the first outer skin portion 36. Therefore, the first outer skin portion 36 is hardly deformed by the load (static load) of the slide door 13 and is deformed mainly by the impact (dynamic load) received from the rolling surface during rolling. Thereby, the load resistance of the support roller 30, a creep characteristic, etc. can be improved.

(Second Embodiment)
Next, the support roller 40 according to the second embodiment of the present invention will be described. As shown in FIG. 8, the support roller 40 includes a metal ball bearing 41 and a resin outer skin 45 integrally provided on the outer periphery of the ball bearing 41. The configuration of the ball bearing 41 is substantially the same as that of the ball bearing 31, but the cross-sectional shape of the outer ring 43 in the cross section including the rotation center axis CA of the support roller 40 is different from the cross-sectional shape of the outer ring 33 shown in FIG.

  As shown in FIG. 9, a groove 43a and grooves 43b and 43b are formed on the outer peripheral surface of the outer ring 43 along the circumferential direction. In the cross section shown in FIG. 9, the bottom 43a1 of the groove 43a is slightly curved so that the central portion in the thrust direction protrudes radially outward. Further, the side wall parts 43a2 and 43a2 of the groove part 43a are formed substantially perpendicularly from both ends in the thrust direction of the bottom part 43a1.

  The groove portions 43b and 43b are formed on both sides in the thrust direction of the groove portion 43a. The groove 43b is shallower than the groove 43a. The width of the groove 43b in the thrust direction is narrower than the width of the groove 43a in the thrust direction. In the cross section shown in FIG. 9, the bottom 43b1 of the groove 43b is parallel to the thrust direction. Further, the side wall portions 43b2 and 43b2 of the groove portion 43b are formed substantially perpendicularly from the thrust direction end portion side and the central portion side of the bottom portion 43b1. Of the side wall portions 43b2 and 43b2, the length in the radial direction of the side wall portion 43b2 (height of the side wall portion 43b2) located on the thrust direction end portion side is the radial direction of the side wall portion 43b2 located on the thrust direction center portion side. Shorter than length.

  The outer skin 45 includes a first outer skin portion 46 made of elastomer and a second outer skin portion 47 made of nylon. The first outer skin portion 46 is formed in an annular shape along the outer peripheral surface of the outer ring 43 and covers the periphery of the intermediate portion in the thrust direction of the outer ring 43. Specifically, as shown in FIG. 10, the first outer skin portion 46 is formed continuously from an inner plate portion 46a that contacts the bottom portion 43a1 of the groove portion 43a and both ends in the thrust direction of the inner plate portion 46a. The side plate portions 46b and 46b abutting against the side wall portions 43a2 and 43a2 and the thrust plate end portions of the side plate portions 46b and 46b are formed continuously, and the thrust portions of the outer ring 43 are adjacent to the groove portion 43a. The outer plate portions 46c and 46c are in contact with each other. A thrust portion 46 d that protrudes toward the outer ring 43 side and extends in the circumferential direction is formed at the center portion in the thrust direction on the inner peripheral surface side of the first outer skin portion 46. The protrusion portion 46 d is formed in the groove portion 43 a of the outer ring 43. It is mated. A groove portion 46e that is recessed toward the outer ring 43 side and extends in the circumferential direction is formed at the central portion in the thrust direction on the outer peripheral surface side of the first outer skin portion 46. Further, a protruding portion 46a1 that protrudes outward in the radial direction and extends in the circumferential direction is formed in the central portion in the thrust direction on the outer peripheral surface side of the inner plate portion 46a. As shown in FIG. 11, the protrusion 46a1 has a different protrusion amount depending on the position in the circumferential direction where the protrusion 46a1 is provided. Specifically, in the cross section shown in FIG. 11, the first outer skin portion 46 is configured such that the apex of the protruding portion 46 a 1 periodically exhibits rectangular irregularities along the circumferential direction.

  Further, both end portions in the thrust direction of the first outer skin portion 46 protrude to the outer ring 43 side, and are fitted in the groove portions 43 b of the outer ring 43. That is, on the inner peripheral surface of the outer plate portion 46c, of the thrust direction end portion of the outer plate portion 46c, slightly protrudes radially inward from the end portion on the opposite side to the end portion connected to the side plate portion 46b, And the protrusion part 46c1 extended in the circumferential direction is formed. The protrusion 46c1 is in contact with the bottom 43b1 of the groove 43b and the side wall 43b2 located on the groove 43a side (thrust direction center side) among the side walls 43b2 constituting the groove 43b.

  On the other hand, on the outer peripheral surface of the outer plate portion 46c, a protruding portion 46c2 that protrudes slightly outward in the radial direction from the connecting portion between the outer plate portion 46c and the side plate portion 46b and extends in the circumferential direction is formed.

  The second outer skin portion 47 is formed in an annular shape along the outer peripheral surface of the first outer skin portion 46 and the outer peripheral surfaces of both end portions of the outer ring 43 in the thrust direction, and covers the periphery of the first outer skin portion 46 and the outer ring 43. That is, as shown in FIG. 12, a protruding portion 47 a that protrudes toward the first outer skin portion 46 side and extends in the circumferential direction is formed at the central portion in the thrust direction on the inner peripheral surface side of the second outer skin portion 47. . The protruding portion 47 a is fitted into the groove portion 46 e of the first outer skin portion 46, and is fitted to the groove portion 43 a of the outer ring 43 via the first outer skin portion 46. That is, the tip of the protrusion 47a enters the groove 43a. A groove 47a1 that fits into the protrusion 46a1 of the first outer skin 46 is formed at the center in the thrust direction of the protrusion 47a. As described above, the protruding portion 46a1 is configured so that the protruding amount varies depending on the position in the circumferential direction. Correspondingly, the depth of the groove portion 47a1 varies depending on the position in the circumferential direction. The protrusion 46a1 is fitted in the groove 47a1. Further, on both sides of the protruding portion 47a, groove portions 47b and 47b that fit into the protruding portions 46c2 and 46c2 of the first outer skin portion 46 are formed.

  Protrusions 47c and 47c projecting to the outer ring 43 side are formed at both ends in the thrust direction of the second outer skin part 47, and the projecting parts 47c and 47c cover the outer periphery of both ends in the thrust direction of the outer ring 43, It covers the end faces in the thrust direction of the outer plate portions 46c, 46c of the first outer skin portion 46. Furthermore, the protrusions 47 c and 47 c are fitted in the grooves 43 b and 43 b of the outer ring 43. Further, the central portion in the thrust direction of the outer peripheral surface of the second outer skin portion 47 is slightly curved so as to be positioned on the outer side in the radial direction from both end portions in the thrust direction.

  Further, the distance in the radial direction from the innermost circumferential surface of the second outer skin portion 47 (protrusion 47 c) to the rotation center axis CA is the outermost radial outermost surface of the outer ring 43. It is comprised so that it may become shorter than the distance in the radial direction from the part located in (side wall part 43a2 and the side wall part 43b2 located in the thrust direction center part side) to rotation center axis line CA.

  The effect similar to that of the support roller 30 can be obtained by the support roller 40 configured as described above. Furthermore, according to the support roller 40, in addition to the same effects as the support roller 30, the following effects can be obtained. That is, in the support roller 40, the protruding portion 46a1 is configured such that the protruding amount varies depending on the position in the circumferential direction, and the depth of the groove portion 47a1 varies depending on the position in the circumferential direction corresponding to the protruding portion 46a1. Therefore, even if a load acts on the outer periphery of the support roller 40 in the circumferential direction, the second outer skin portion 47 can be prevented from being displaced in the circumferential direction with respect to the first outer skin portion 46.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  For example, in the support roller 40, the first outer skin portion 46 is configured to cover the outer periphery of the intermediate portion in the thrust direction of the outer ring 43. However, like the support roller 40A shown in FIG. You may comprise so that it may cover entirely. That is, in the cross section including the rotation center axis CA of the support roller 40 </ b> A as shown in FIG. 13, both ends in the thrust direction of the first outer skin portion 46 </ b> A are positioned on both ends in the thrust direction of the outer ring 43. In this case, the second outer skin portion 47 </ b> A does not contact the outer ring 43. In the support roller 40 </ b> A configured as described above, since the second outer skin portion 47 made of a hard material is not in contact with the outer ring 43, the shock absorption is superior to the support roller 40. However, since the load of the slide door main body acts on the first outer skin portion 46A, the support roller 40A is slightly inferior in load resistance and creep characteristics as compared to the support roller 40. In the support roller 30 as well, the first outer skin portion 36 may be configured to entirely cover the outer periphery of the outer ring 33.

  Further, in the support roller 40, the protruding amount of the protruding portion 46c1 is configured to be different according to the position in the circumferential direction, and the depth of the groove portion 47b is set according to the position in the circumferential direction corresponding to the protruding portion 46c1. You may comprise so that it may differ. According to this, even if a larger load acts on the outer periphery of the support roller 40 in the circumferential direction, the second outer skin portion 47 can be prevented from being displaced in the circumferential direction with respect to the first outer skin portion 46.

  Further, in the support roller 30 and the support roller 40, the depth of the groove portion 33a and the groove portion 43a is different depending on the position in the circumferential direction, and the protrusion portion 36d and the protrusion portion correspond to the groove portion 33a and the groove portion 43a. You may comprise so that the protrusion amount of 46d may change with the positions of the circumferential direction. According to this, even when a larger load is applied to the outer periphery of the support roller 30 and the support roller 40 in the circumferential direction, the outer skin 35 and the outer skin 45 are displaced in the circumferential direction with respect to the outer ring 33 and the outer ring 43. Can be prevented.

  Moreover, the material of the 1st outer skin part 36,46,46A and the 2nd outer skin part 37,47,47A is not ask | required. However, if a material having an elastic modulus of 2000 MPa or less is selected as the material of the first skin portions 36, 46, 46A, the impact received from the rolling surface during rolling is sufficiently absorbed by the first skin portions 36, 46, 46A. Thus, quietness when opening and closing the door is improved.

DESCRIPTION OF SYMBOLS 12 ... Rail, 13 ... Sliding door, 20 ... Roller unit, 22 ... Horizontal support shaft, 30, 40, 40A ... Support roller, 31, 41 ... Ball bearing, 33a, 43a ... groove, 35, 45, 45A ... outer skin, 36d, 46d ... projection, 36e, 46e ... groove, 37a, 47a ... projection, 46a1 ... projection, 47a1 ... Groove, CA ... Rotation center axis

Claims (8)

A support roller that is assembled to a support shaft provided on a slide door of a vehicle, supports the slide door, and rotates around the support shaft when the slide door is opened and closed to smoothly open and close the slide door. There,
A bearing member assembled to the support shaft;
An outer skin member covering the outer periphery of the bearing member,
The outer skin member is
A first skin portion extending in the circumferential direction along the outer peripheral surface of the bearing member;
A second skin portion extending in the circumferential direction along the outer peripheral surface of the first skin portion;
The second skin portion is formed of a material harder than the first skin portion,
A support roller in which the first outer skin part and the second outer skin part are concavo-convexly fitted. The support roller according to claim 1,
On the outer peripheral surface of the first outer skin part, a fitting part consisting of one or both of a groove part and a projecting part extending in the circumferential direction is formed,
The second outer skin part is a support roller that is fitted in the fitting part of the first outer skin part. The support roller according to claim 1 or 2,
On the outer peripheral surface of the bearing member, a fitting portion formed of either or both of a groove portion and a protruding portion extending in the circumferential direction is formed,
The first outer skin part is a support roller that is fitted in the fitting part of the bearing member. The support roller according to claim 3,
The distance from the innermost part of the inner peripheral surface of the second skin part to the rotation center axis of the bearing member is the rotation of the bearing member from the outermost part of the outer peripheral surface of the bearing member. Support roller smaller than the distance to the central axis. The support roller according to any one of claims 2 to 4,
The support roller in which the rotation center axial direction end part of the said 2nd outer skin part is in contact with the rotation center axial direction end part of the said bearing member. The support roller according to any one of claims 2 to 5,
The fitting portion of the first outer skin portion has a protruding portion extending in the circumferential direction,
The support roller in which the protrusion height of the protrusion part which comprises the fitting part of a said 1st outer skin part changes with the circumferential position in which the said protrusion part is provided. The support roller according to any one of claims 2 to 5,
The fitting portion of the first outer skin portion has a groove portion extending in the circumferential direction,
The support roller in which the depth of the groove part which comprises the fitting part of a said 1st outer skin part changes with the circumferential position where the said groove part is provided. A roller unit that supports a slide door of a vehicle so as to be movable along a slide rail provided in a vehicle main body,
A support shaft;
A support roller that is assembled to the support shaft, rotates around the support shaft when the slide door is opened and closed, and smoothes the opening and closing operation of the slide door;
The support roller is
A bearing member assembled to the support shaft;
An outer skin member covering the outer periphery of the bearing member,
The outer skin member is
A first skin portion extending in the circumferential direction along the outer peripheral surface of the bearing member;
A second skin portion extending in the circumferential direction along the outer peripheral surface of the first skin portion;
The second skin portion is formed of a material harder than the first skin portion,
A roller unit in which the first outer skin part and the second outer skin part are concavo-convexly fitted.

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