JP2013043593A - Window shade device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy and strength of a screw part, when forming the screw part with a resin, wherein the screw part supports a winding shaft so as to move in the shaft direction thereof.SOLUTION: A window shade device for a vehicle is provided with a window shade, a winding shaft 40, a screw support shaft 50 as one example of a pair of support shafts, and a biasing-side support shaft. A screw hole 42s is formed in at least one end of the winding shaft 40. The screw support shaft 50 is formed with a resin, and a screw part 51, which is screwed into the screw hole 42s, and a center hole along the center shaft of the screw part 51 are formed. A reinforcement shaft 70 is inserted into the center hole. A biasing mechanism, which biases the winding shaft 40 in a winding direction, is provided at least at one end of the winding shaft 40.

Description

  The present invention relates to a vehicle window shade device that covers a vehicle window so as to be shieldable and openable.

  A typical vehicle window shade device includes a winding shaft disposed along a lower edge of the window, and a shade wound around the winding shaft. And the shade pulled out from the winding shaft shields the window.

  By the way, when the side edge part of a window inclines with respect to the lower edge part of a window, the clearance gap between the side edge part of a shade and the side edge part of a window changes according to the pulling-out degree of a shade. For this reason, depending on the pulling-out degree of a shade, a big clearance gap will arise between the side edge part of a shade, and the side edge part of a window.

  Therefore, Patent Documents 1 and 2 disclose a technique for moving the winding shaft along the axial direction in accordance with the withdrawal of the shade.

  In patent documents 1 and 2, the winding shaft is rotatably supported by screwing a screw into a screw hole formed in the winding shaft. When the winding shaft rotates in accordance with the withdrawal of the shade, the winding shaft moves along the axial direction by the screwed structure of the screw and the screw hole. As a result, the winding shaft is moved along the axial direction in accordance with the degree of withdrawal of the shade, so that the gap between the side edge of the shade and the side edge of the window is made as small as possible.

Japanese Patent Laid-Open No. 2-16284 JP 2006-274792 A

  By the way, from the viewpoint of weight reduction and the like, it is preferable to form the screw with a resin. However, if the entire screw is filled with resin, the problem of resin sinking will be prominent and it will be difficult to form an accurate screw groove. That is, there is a restriction on the resin thickness in order to form the screw groove with high accuracy. Therefore, in order to form a highly accurate screw groove, it is preferable to hollow the inside of the screw.

  However, if the inside of the screw is made hollow, the strength will be inferior, and it will be difficult to rotatably support the winding shaft with sufficient support strength.

  Therefore, the present invention aims to improve the accuracy of the screw portion and the strength of the screw portion when the screw portion that supports the winding shaft so as to move in the axial direction is formed of resin. To do.

  In order to solve the above-mentioned problem, a first aspect is a vehicle window shade device that covers a window so that the window can be shielded and opened, and a window shade that can shield the window, and a winding that can wind the window shade. A shaft and a pair of support shafts rotatably supporting both ends of the take-up shaft, screw holes are formed in at least one end of the take-up shaft, and at least one of the pair of support shafts is made of resin A screw support shaft that is formed and has a screw portion screwed into the screw hole and a center hole along a center axis of the screw portion, and a reinforcing shaft is disposed in the center hole, and the winding shaft An urging mechanism for urging the winding shaft in the direction of winding the window shade is provided on at least one end side.

  A 2nd aspect is a window shade apparatus for vehicles which concerns on a 1st aspect, Comprising: The said reinforcement shaft is metal.

  A 3rd aspect is a vehicle window shade apparatus which concerns on the 1st or 2nd aspect, Comprising: The said screw support shaft is integral with a shaft support part in the protrusion attitude | position which supports the said winding shaft rotatably. The reinforcing shaft is inserted into the central hole of the screw support shaft through the shaft support portion, and a head is formed on the reinforcement shaft that contacts the shaft support portion from the outside.

  A 4th aspect is a window shade apparatus for vehicles which concerns on any one 1st-3rd aspect, Comprising: A shaft support part with the protrusion attitude | position which the said screw support shaft supports the said winding shaft rotatably The reinforcement shaft is inserted into the center hole of the screw support shaft through the shaft support portion, a cap receiving portion is provided on the outer surface of the shaft support portion, and is attached to the cap receiving portion. A cap member is further provided that presses the reinforcing shaft toward the center hole.

  A 5th aspect is a window shade apparatus for vehicles which concerns on a 4th aspect, Comprising: The said cap member is inserted in the direction orthogonal to the axial direction of the said reinforcement shaft with respect to the said cap receiving part. And attached to the cap receiving portion.

  A sixth aspect is a vehicle window shade device according to any one of the first to fifth aspects, wherein at least one of the pair of support shafts is inserted into at least one end of the winding shaft. One end portion of the biasing mechanism is connected to the biasing side support shaft so as not to rotate relative to the biasing side support shaft, and the other end portion is connected to the inside of the winding shaft so as not to rotate relative to the biasing side support shaft. An urging member inserted into the winding shaft in a state and an elastic tube covering the urging member are provided, and an elastic ring is positioned and fixed to the urging side support shaft.

  According to the vehicle window shade device according to the first aspect, at least one end portion of the winding shaft has a screw hole, and at least one of the pair of support shafts has a screw portion that is screwed into the screw hole. Therefore, the winding shaft can be moved along the axial direction according to the pulling degree of the window shade by the screwing structure. In addition, since at least one of the pair of support shafts is made of resin and has a center hole along the center axis of the threaded portion, the thickness of the threaded portion can be reduced to improve accuracy. Can do. Moreover, since the reinforcement shaft is arrange | positioned in the center hole, the strength improvement of a thread part can be aimed at.

  According to the 2nd aspect, since the reinforcement shaft is metal, the strength improvement of a thread part can be aimed at more.

  According to the third aspect, since the reinforcement shaft is inserted through the shaft support portion into the center hole in a state where the head portion of the reinforcement shaft is in contact with the shaft support portion from the outside, the screw support shaft is used. The support strength of the winding shaft is further improved.

  According to the fourth aspect, it is possible to easily prevent the reinforcing shaft from being removed by the cap member.

  According to the fifth aspect, the cap member is attached to the cap receiving portion by being inserted in a direction perpendicular to the axial direction of the reinforcing shaft with respect to the cap receiving portion. It can be more easily and reliably retained.

  According to the sixth aspect, the contact sound between the urging member and the take-up shaft inner peripheral surface can be suppressed by the elastic tube. Further, when the winding shaft moves along the axial direction, the elastic tube easily moves along the axial direction in the winding shaft. Therefore, the state where the elastic tube covers the urging member can be more reliably maintained by the elastic ring positioned and fixed to the urging side support shaft.

It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is a permeation | transmission perspective view which shows the window shade apparatus for vehicles. It is a disassembled perspective view of the one end side part of the window shade apparatus for vehicles. It is a disassembled perspective view of the other end side part of the window shade apparatus for vehicles. It is a longitudinal cross-sectional view which shows the one end side part of the window shade apparatus for vehicles. It is explanatory drawing which shows the example of a manufacturing process of a screw support shaft. It is a disassembled perspective view which shows a cap receiving part and a cap member. It is a disassembled perspective view which shows a cap receiving part and a cap member. It is a longitudinal cross-sectional view which shows the other end side part of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles.

  Hereinafter, the window shade device for vehicles concerning an embodiment is explained.

  For convenience of explanation, the overall operation of the vehicle window shade device will be described first. 1 to 3 are explanatory views showing a state in which the vehicle window shade device 20 is attached to the vicinity of the window 10 of the vehicle, FIG. 1 is a state in which the window shade 30 is completely wound, and FIG. FIG. 3 shows a state where the shade 30 is pulled out partway, and FIG. 3 shows a state where the window shade 30 is completely pulled out. In the present embodiment, the case where the window 10 is a side window on the side of the rear seat, that is, a side window between the B pillar and the C pillar will be described. It may be.

  The window 10 has an upper edge 12a of the door panel 12 that is a first frame, and one side frame that is a second frame that is inclined with respect to the edge 12a (here, inclined at an obtuse angle). 14a is disposed inside.

  More specifically, the window 10 is disposed in a window frame 14 above the door panel 12 so as to be opened and closed. That is, a window frame 14 is disposed above the upper edge portion 12a of the door panel 12 so as to surround both sides and the upper three sides of the upper region. One side frame portion 14a of the window frame 14 (the left side in FIGS. 1 to 3 and the rear side in the vehicle) has an oblique posture that forms an obtuse angle from the rear end portion of the upper edge portion 12a of the door panel 12, in this case, the vehicle rear side. It extends upward in a posture inclined to the side. Further, the other side frame portion 14b of the window frame 14 (the right side in FIGS. 1 to 3, the front side in the vehicle) has an oblique posture that is an acute angle from the front end portion of the upper edge portion 12a of the door panel 12, here the vehicle rear It extends upward in a posture inclined to the side. That is, one side frame portion 14a and the other side frame portion 14b are in a parallel posture. However, it is not essential that the side frame portions 14a and 14b are in a parallel posture. The upper frame portion 14c of the window frame 14 is disposed in an oblique (slightly oblique) posture with respect to the upper edge portion 12a of the door panel 12 and spaced from the upper edge portion 12a. But the upper frame part 14c of the window frame 14 may be a parallel attitude | position with respect to the edge part 12a.

  The window 10 is provided so as to be openable and closable from the door panel 12 into the window frame 14. In a state where the window 10 is closed so as to cover the entire inside of the window frame 14, the exposed area of the window 10 is an internal area surrounded by the edge 12 a of the door panel 12 and the window frame 14.

  Usually, with the occupant seated in the rear seat, the occupant's face is positioned inside the one side frame portion 14a, so that the occupant's face can be shielded from the outside in the vicinity of the one side frame portion 14a. It is preferable to do. The vehicle window shade device 20 relates to a technique for reducing the gap between the window shade 30 and the one side frame portion 14a in the vicinity of the one side frame portion 14a as much as possible.

  That is, in this embodiment, the winding shaft 40 that winds up the window shade 30 is disposed along the edge portion 12 a of the door panel 12. The take-up shaft 40 moves in the axial direction, that is, along the upper edge 12 a of the door panel 12 in accordance with the degree of drawing out of the window shade 30. That is, in a state where the window shade 30 is completely wound around the winding shaft 40, the winding shaft 40 exists at a position away from the one side frame portion 14a. In this state, a gap is formed between the winding shaft 40 and the one side frame portion 14a, and the window shade 30 is wound around the winding shaft 40 in a state of extending to the gap. (See FIG. 1).

  When the window shade 30 is pulled out from this state and the window shade 30 closes partway in the vertical direction of the window 10, the winding shaft 40 moves toward the one side frame portion 14a along the axial direction. In accordance with this movement, the edge portion along the one side frame portion 14a of the window shade 30 moves to the one side frame portion 14a side. By this movement, a gap between the side edge portion on the one side frame portion 14a side of the window shade 30 and the one side frame portion 14a can be narrowed (see FIG. 2).

  When the window shade 30 is further pulled out from the above state and the window shade 30 shields almost the entire window 10, the winding shaft 40 further moves toward the one side frame portion 14a along the axial direction thereof. Concurrently with this movement, the edge portion of the window shade 30 along the one side frame portion 14a further moves to the one side frame portion 14a side. By this movement, a gap between the side edge portion on the one side frame portion 14a side of the window shade 30 and the one side frame portion 14a can be narrowed (see FIG. 3).

  For this reason, the gap between the side edge part on the one side frame part 14a side of the window shade 30 and the one side frame part 14a in both the state where the window shade 30 is being pulled out and the state in which the window shade 30 is completely pulled out. Can be made as small as possible.

  In order to realize the above, a configuration for moving the winding shaft 40 according to the pulled-out state of the window shade 30 in the vehicle window shade device 20 according to the present embodiment will be described. 4 is a transparent perspective view showing the vehicle window shade device 20, FIG. 5 is an exploded perspective view of one end portion of the vehicle window shade device 20, and FIG. 6 is the other end side of the vehicle window shade device 20. It is a disassembled perspective view of a part. In addition, the window shade 30 is abbreviate | omitted in each following figure.

  The vehicle window shade device 20 includes a window shade 30, a winding shaft 40, a screw support shaft 50 and an urging side support shaft 60 as a pair of support shafts, a reinforcing shaft 70, and an urging mechanism 80. I have.

  The window shade 30 is a sheet-like member formed by cutting and sewing materials such as a mesh-like cloth and a resin sheet (see FIG. 3). Here, the window shade 30 is formed in a size and shape that covers an exposed portion surrounded by the edge 12 a of the door panel 12 and the window frame 14 in the window 10. The window shade 30 preferably has a size and a shape that can shield almost the entire window 10, but can have a shape and size that shields a part of the window 10, or a plurality of windows can be shielded collectively. It may be formed in a shape and size. The drawer length of the window shade 22 is 400 mm to 500 mm, for example.

  A stay 32 is attached to the end of the window shade 30 in the drawing direction. Here, since the window shade 30 is wound up by the winding shaft 40 and is drawn upward along the window 10 from the winding shaft 40, the upper end portion of the window shade 30 is the drawing direction side end portion. . When the window shade 30 is wound up, the stay 32 is disposed in a drawer slit 46h of the case 46 described later or in an opening thereof. By pulling the stay 32 along the window 10 from this state, the window shade 30 is pulled out along the window 10 through the drawing slit 46h. Further, the stay 32 is provided with a hook portion (not shown) that can be locked to a locked portion provided in the upper frame portion 14 c of the window frame 14. And in the state which pulled out the window shade 30, the window shade 30 is maintained in the state pulled out by latching the said hook part to the said to-be-latched part.

  The winding shaft 40 is configured to be able to wind the window shade 30. More specifically, the winding shaft 40 includes a shaft main body 41, a screw support bearing 42, and a bearing 43. The length dimension of the winding shaft 40 is smaller than the length dimension of the edge 12a of the door panel 12 and the length dimension of the case 46 described later. Therefore, the winding shaft 40 can be moved along the longitudinal direction of the edge portion 12a and the case 46 in a state where the winding shaft 40 is disposed in a posture along the longitudinal direction of the edge portion 12a and the case 46.

  The shaft main body 41 is formed in a cylindrical member made of metal or the like. On the inner peripheral portion of the shaft main body 41, a ridge extending along the longitudinal direction is formed.

  The screw support bearing 42 is formed in a cylindrical shape that can be inserted into one end of the shaft body 41 (see FIG. 5). A spline groove 42 a is formed in the outer peripheral portion of the screw support bearing 42 along the axial direction thereof. In a state where the main screw support bearing 42 is inserted into one end of the shaft main body 41, the protrusion on the inner peripheral portion of the shaft main body 41 is fitted into the spline groove 42 a, and the screw support bearing 42 is inserted into the shaft main body 41. On the other hand, the rotation is stopped. Further, a flange 42 b is formed at one end of the screw support bearing 42. In a state where the screw support bearing 42 is inserted into one end portion of the shaft main body portion 41, the flange portion 42b contacts the one end side opening portion of the shaft main body portion 41, whereby the screw support bearing 42 is positioned in the axial direction. ing. Further, a screw hole 42 s formed with a screw groove into which a screw portion 51 of a screw support shaft 50 described later can be screwed is formed in the inner peripheral portion of the screw support bearing 42.

  The bearing 43 is formed in a cylindrical shape that can be inserted into the other end of the shaft body 41 (see FIG. 6). A spline groove 43 a is formed in the outer peripheral portion of the bearing 43 along the axial direction thereof. In a state where the main bearing 43 is inserted into the other end portion of the shaft main body 41, the protrusion on the inner peripheral portion of the shaft main body 41 is fitted into the spline groove 43 a, and the bearing 43 rotates with respect to the shaft main body 41. It has come to be stopped. A flange 43 b is formed at one end of the bearing 43. In a state where the bearing 43 is inserted into the other end portion of the shaft main body portion 41, the flange portion 43b contacts the other end side opening portion of the shaft main body portion 41, thereby positioning the bearing 43 in the axial direction. . In addition, an insertion hole 43h through which an urging-side support shaft 60 described later can be rotatably inserted is formed in the inner peripheral portion of the bearing 43.

  The take-up shaft 40 is accommodated in the case 46. The case 46 is a long member formed of a metal such as aluminum, a cylindrical portion 47 that can accommodate the winding shaft 40 and the window shade 30 wound around the winding shaft 40, and a pair of flange portions. 48 (see FIGS. 5 and 6). A slit is formed in one side portion of the cylindrical portion 47, and a pair of flange portions 48 are formed so as to extend outward from both side edge portions sandwiching the slit. An extraction slit 46 h is formed by the space formed between the slit formed in the tubular portion 47 and the pair of flange portions 48. The window shade 30 is pulled out and wound up through the main drawing slit 46h, and the stay 32 is disposed in the opening of the drawing slit 46h or inside the window shade 30 in a state where the window shade 30 is completely wound up.

  The case 46 is formed with a screw stop 45 to which the screw S can be screwed (see FIG. 6). Here, in order to easily process the case 46 by making the cross-sectional shape of the case 46 the same, the screwing portion 45 projects a part of the case 46 into a thin cylindrical shape extending along the longitudinal direction thereof. This is not essential. Then, a shaft support portion 54 of the screw support shaft 50 and a shaft support portion 54B of the urging side support shaft 50, which will be described later, are screwed and fixed using the main screw fixing portion 45. That is, the case 46 has a role of fixing the shaft support portions 54 and 54B in a state in which the rotation is restricted at both ends of the winding shaft 40.

  The one end side portion of the vehicle window shade device 20, that is, the portion on the screw support shaft 50 side will be described. FIG. 7 is a longitudinal sectional view showing one end portion of the vehicle window shade device 20, and FIGS. 9 and 10 are exploded perspective views showing the cap receiving portion 56 and the cap member 74.

  As shown in FIGS. 4, 5, 7, 9, and 10, the screw support shaft 50 is configured to rotatably support one end portion of the winding shaft 40.

  More specifically, the screw support shaft 50 is formed as a rod-shaped member made of resin. Nylon resin etc. can be used as resin. A screw groove is formed in the entire longitudinal direction of the outer periphery of the screw support shaft 50, and the entire longitudinal direction of the screw support shaft 50 is a screw portion 51. However, a part of the screw support shaft 50 may be a screw portion. The length dimension of the screw part 51 is determined by the length dimension (for example, 40 mm) to which the winding shaft 40 is to be moved. A central hole 52 is formed along the central axis of the screw support shaft 50. Here, the center hole 52 is opened at one end of the screw support shaft 50 (the end facing the outside in the support state of the winding shaft 40) and closed at the other end. That is, the center hole 52 is a non-through hole. However, the center hole 52 may be a hole that penetrates the screw support shaft 50. However, in the actual operation state of the vehicle window shade device 20, it is preferable that the center hole 52 is formed in a portion of the screw portion 51 that is screwed with the screw hole 42s. This is because it is preferable to reduce the thickness of this portion to increase the accuracy of the screw portion 51. The diameter of the screw support shaft 50 is set according to a length dimension or the like where the window shade 22 is to be wound by one winding of the winding shaft 40. The diameter of the center hole 52 is set according to the thickness or the like that is preferable for the screw support shaft 50 in terms of accuracy when processing the resin. An example of the diameter of the screw support shaft 50 is 8 mm, and the diameter of the hollow hole 52 in this case is 3 mm, for example. In this case, the thickness of the screw support shaft 50 can be about 2.5 mm, and the screw portion 51 having a groove depth of about 1 mm can be formed with high accuracy. The center hole 52 does not need to be a circular hole and may be a square hole or the like.

  The screw support shaft 50 is integrally formed with a shaft support portion 54 by a resin. The shaft support portion 54 is a member that can be fixed to one end portion of the case 46 by screws or the like. The screw support shaft 50 is integrally formed in a projecting posture with respect to the shaft support portion 54, thereby supporting the winding shaft 40 in a rotatable manner.

  Here, the shaft support portion 54 is formed as a plate-like member capable of closing the one end side opening of the case 46. More specifically, the shaft support portion 54 is formed in a plate shape in which the protruding plate portion 54b protrudes from the outer peripheral portion of the disc portion 54a (see FIGS. 9 and 10). The disc portion 54a is formed in a plate-like portion that can close one end of the cylindrical portion 47, and the protruding plate portion 54b is formed in a plate-like portion that can close one-end openings of the pair of flange portions 48. . The screw support shaft 50 protrudes from the central portion of the disc portion 54a in a posture orthogonal to the disc portion 54a. Further, a screw retaining piece 54c having a screw insertion hole is provided on the outer periphery of the shaft support portion 54 so as to project. Then, with the shaft support portion 54 disposed so as to close the opening on the one end side of the case 46, the screw S is inserted into the screw stop piece 54c and screwed into the screw stop portion 45 of the case 46. The shaft support portion 54 is attached and fixed to one end portion of the case 46. In this state, the screw support shaft 50 projecting from the shaft support portion 54 is disposed along the central axis of the tubular portion 47. The screw support shaft 50 is screwed into the screw hole 42 s of the screw support bearing 42 of the take-up shaft 40, so that one end of the take-up shaft 40 can be rotated in the cylindrical portion 47 and accompanying the rotation. It is supported so as to be movable in the axial direction.

  In order to form the screw support shaft 50 with respect to the shaft support portion 54, for example, as shown in FIG. 8, a hole-like mold surface 104 in which screw grooves are formed is formed in the mold 102. The outer shape of the screw support shaft 50 may be formed on the mold surface 104. The mold 102 can be released from the outer peripheral surface of the screw support shaft 50 by rotating the mold 102 relative to the screw support shaft 50 along the spiral direction A of the screw.

  As shown in FIGS. 4, 5, and 7, the reinforcing shaft 70 is configured to be able to pass through the center hole 52. That is, the reinforcing shaft 70 is formed as a rod-shaped member that can be inserted into the center hole 52 without a gap. The length of the reinforcing shaft 70 is preferably the same as the length of the central hole 52, but this is not essential. For example, the reinforcing shaft 70 may have a length dimension that reaches the middle of the center hole 52. When the center hole is a through hole, the reinforcing shaft may be longer than the center hole and protrude from the tip of the screw support shaft. The reinforcing shaft 70 is preferably formed of a metal such as iron or steel, but this is not essential and may be formed of resin or the like. Here, the reinforcing shaft 70 will be described with an example made of metal.

  A head 72 is formed at one end of the reinforcing shaft 70. Here, the head 72 is formed in a disk-like portion that protrudes over the entire outer periphery of one end of the reinforcing shaft 70. When the reinforcing shaft 70 is inserted into the center hole 52 of the screw support shaft 50 through the shaft support portion 54, the head 72 comes into contact with the shaft support portion 54 from the outside. . Thereby, the reinforcing shaft 70 is more reliably maintained in the orthogonal posture with respect to the shaft support portion 54. Further, the screw support shaft 50 through which the reinforcement shaft 70 is inserted is also more reliably maintained in the orthogonal posture with respect to the shaft support portion 54 by the support structure of the reinforcement shaft 70.

  The head 72 also has a role of positioning the reinforcing shaft 70 in the direction of insertion into the center hole 52.

  As shown in FIGS. 4, 5, 7, 9, and 10, a cap receiving portion 56 is provided on the outer surface of the shaft support portion 54, and a cap member 74 is attached to the cap receiving portion 56. It is like that. The cap member 74 presses the head 72 toward the center hole 52, thereby preventing the reinforcing shaft 70 from coming off. Note that the presence of the head 72 is not essential. Even when there is no head 72, the outward end of the reinforcing shaft 70 is pressed toward the center hole 52 by the same configuration as the cap receiving portion 74 and the cap member 74, so that the reinforcing shaft 70 can be prevented from being detached. it can.

  More specifically, a semicircular receiving wall portion 56a is formed on the outer surface of the shaft support portion 54 so as to surround the opening of the center hole 52 opened to the outer surface (see FIG. 9). The head 72 is brought into contact with the outer surface of the shaft support portion 54 in the receiving wall portion 56a. Moreover, the protrusion part 56b which protrudes toward the inner peripheral side is formed in the part away from the outer surface of the shaft support part 54 among the inner peripheral parts of the receiving wall part 56a. The protruding portion 56b protrudes outward (upward in FIG. 9) at both end portions of the receiving wall portion 56a.

  The cap member 74 is a member formed of resin or the like, and includes a cap main body 74a and a protrusion 74c (see FIGS. 9 and 10). The cap main body 74 a is formed so as to be disposed in the receiving wall portion 56 a and has a recess 74 b that can accommodate the head 72. The protrusion 74c is provided so as to protrude from one main surface of the cap main body 74a and can be disposed in the protrusion 56b.

  Then, the cap member 74 is inserted into the cap receiving portion 56 in a state where the reinforcing shaft 70 is inserted into the center hole 52 and the head 72 is disposed so as to contact the outer surface of the shaft support portion 54. More specifically, the cap member 74 is inserted in a direction perpendicular to the axial direction of the reinforcing shaft 70 with respect to the cap receiving portion 56 (see arrow B in FIGS. 9 and 10), and the cap body portion 74a is inserted. It arrange | positions in the receiving wall part 56a, and the protrusion 74c is arrange | positioned in the protrusion part 56b. Thereby, positioning in the removal direction is achieved by the cap main body 74a in a state where the head 72 is accommodated in the recess 74b.

  It is not essential to employ the cap receiving part 56 and the cap member 74. For example, the reinforcing shaft 70 may be fixed in the center hole 52 by an adhesive, screwing, or the like. Further, when forming the screw support shaft 50 as a mold, the reinforcing shaft 70 may be inserted as an insert.

  The other end portion of the vehicle window shade device 20, that is, the portion on the urging side support shaft 60 side will be described. FIG. 11 is a longitudinal sectional view showing the other end portion of the vehicle window shade device 20.

  As shown in FIGS. 4, 5, 6, and 11, the urging-side support shaft 60 is configured to rotatably support the other end portion of the take-up shaft 40.

  More specifically, the urging side support shaft 60 is formed as a rod-shaped member made of resin. Unlike the screw support shaft 50, no screw groove is formed on the outer peripheral portion of the urging side support shaft 60. A central hole 62 is formed along the central axis of the urging side support shaft 60. Here, the center hole 62 is opened at one end of the urging-side support shaft 60 (the end facing outward when the winding shaft 40 is supported) and closed at the other end. That is, the center hole 62 is a non-through hole. However, the center hole 52 may be a hole that penetrates the urging side support shaft 60. In addition, the center hole 62 may not be formed in the biasing side support shaft 60.

  The urging side support shaft 60 is integrally formed with a mold together with a shaft support portion 54B. As the resin, nylon resin or the like can be used similarly to the screw support shaft 50. The shaft support portion 54B is a member having a plane symmetrical structure with the shaft support portion 54. The urging side support shaft 60 is integrally formed in a projecting posture with respect to the shaft support portion 54B. Similarly to the shaft support portion 54, the shaft support portion 54 </ b> B is attached and fixed to the other end portion of the case 46 with a screw S so that the other end side opening of the case 46 is closed. In this state, the urging-side support shaft 60 protruding from the shaft support portion 54 </ b> B is disposed along the central axis of the tubular portion 47. The urging-side support shaft 60 is fitted into the insertion hole 43h of the bearing 43 of the take-up shaft 40, so that the other end of the take-up shaft 40 can be rotated in the tubular portion 47 and moved in the axial direction thereof. Supported by In this state, the urging-side support shaft 60 is inserted into one end portion of the winding shaft 40.

  Further, similarly to the screw support shaft 50, the reinforcing shaft 70 </ b> B is inserted into the center hole 62 of the bias side support shaft 60, and the strength of the bias side support shaft 60 is improved. The reinforcing shaft 70B may be made of a metal such as iron or steel in the same manner as the reinforcing shaft 70. Further, a cap receiving portion 56B is provided on the outer surface of the shaft support portion 54B, and the cap member 74B is attached to the cap receiving portion 56. Thereby, the reinforcing shaft 70B is prevented from coming off.

  The shaft support portion 54B, the reinforcing shaft 70B, the cap receiving portion 56B, and the cap member 74B are members having a plane symmetrical structure with the shaft supporting portion 54, the reinforcing shaft 70, the cap receiving portion 56, and the cap member 74, respectively. Then, those detailed explanations are omitted.

  As shown in FIGS. 4, 6, and 11, the winding shaft 40 is attached to the end of the winding shaft 40 that is supported by the biasing support shaft 60, and the window shade 30 is attached. An urging mechanism 80 for urging in the winding direction is provided.

  The urging mechanism 80 includes a coil spring 82 as an urging member and an elastic tube 86 that covers the coil spring 82.

  One end portion of the coil spring 82 is connected to one end portion of the urging side support shaft 60 in the shaft main body portion 41 of the winding shaft 40. Here, the tip of the L-shaped portion at one end of the coil spring 82 (see FIG. 6) is inserted through a hole formed at the tip of the urging-side support shaft 60 (see FIG. 11). One end portion of 82 is connected to the tip end portion of the urging-side support shaft 60 so as not to be relatively rotatable.

  The other end of the coil spring 82 is connected to the inside of the winding shaft 40 so as not to be relatively rotatable. Here, the connection is performed using a spring connecting member 88. The spring connecting member 88 is formed as a long member that can be inserted into the shaft main body 41. A spline groove 88a is formed along at least a part of the outer peripheral portion of the spring connecting member 88 along the axial direction thereof. Then, in a state where the spring connecting member 88 is disposed in the shaft main body 41, the protrusion on the inner peripheral portion of the shaft main body 41 is fitted into the spline groove 88a. Thereby, the spring connecting member 88 is prevented from rotating in a state in which the spring connecting member 88 can move along the axial direction in the shaft main body 41. Further, a hole extending along the radial direction is formed at one end portion of the spring coupling member 88, and the tip end portion (see FIG. 6) of the L-shaped portion at the other end portion of the coil spring 82 is inserted into the hole. As a result (see FIG. 11), the other end of the coil spring 82 is connected to the spring connecting member 88 so as not to be relatively rotatable.

  Then, with the end portions of the coil spring 82 connected to the biasing support shaft 60 and the spring connection member 88, the distal ends of the spring connection member 88, the coil spring 82 and the biasing support shaft 60 are placed in the shaft main body 41. Insert and place. In this state, when the winding shaft 40 rotates with respect to the urging-side support shaft 60, the spring coupling member 88 also rotates together with the winding shaft 40. As a result, the coil spring 82 is twisted between the biasing side support shaft 60 and the spring connecting member 88. The spring connection member 88 and the take-up shaft 40 are urged in the opposite direction to the urging-side support shaft 60 by the force for returning the twist of the coil spring 82 to the original state. This urging force acts as a force for winding the window shade 30.

  The elastic tube 86 is a member formed of an elastomer such as rubber, and is formed in a cylindrical member that covers the coil spring 82. The elastic tube 86 is formed in a length dimension that is larger than the natural length of the coil spring 82.

  Further, an annular groove 62g is formed at a position intermediate from the portion where the coil spring 82 is connected in the urging side support shaft 60 (see FIG. 11), and the annular groove 62g is formed of an elastic material such as rubber. The ring 89 is positioned and fixed. The spring connecting member 88 is formed with a step portion 88s facing the coil spring 82 between a portion where the spline groove 88a is formed and a portion where the coil spring 82 is connected. In a state where the elastic tube 86 is externally fitted to the coil spring 82, both ends of the elastic tube 86 are also attached to one end of the spring connecting member 88 and the end of the biasing side support shaft 60 on the side where the coil spring 82 is connected. It is fitted and disposed between the step 88s and the elastic ring 89. The elastic tube 86 is regulated by the step 88s and the elastic ring 89 so as to be positioned between them.

  The operation of the vehicle window shade device 20 configured as described above will be described.

  First, in the initial state, the window shade 30 is completely wound around the winding shaft 40, and the entire window 10 is exposed (see FIGS. 1 and 4). In this state, the winding shaft 40 exists at a position away from the one side frame portion 14a. Here, the other end portion of the winding shaft 40 reaches the other end portion of the case 46 and is located near the shaft support portion 54B.

  When the window shade 30 is pulled out along the window 10 from the initial state, the winding shaft 40 is rotated along with the pulling out. Then, the winding shaft 40 moves to one side frame portion 14a side by screwing the screw hole 42s of the screw supporting bearing 42 at one end of the winding shaft 40 and the screw supporting shaft 50 (FIGS. 2 and 2). 12). And the winding shaft 40 is located in the intermediate part of case 46, and the window shade 30 will be in the state pulled out to the up-down direction intermediate part of the window 10. FIG.

  When the window shade 30 is further pulled out along the window 10, the winding shaft 40 is further rotated along with the drawing. The winding shaft 40 is further moved to one side frame portion 14a side by screwing the screw hole 42s of the screw supporting bearing 42 at one end of the winding shaft 40 and the screw supporting shaft 50 (FIGS. 3 and 13). reference). The take-up shaft 40 reaches one end of the case 46 and is located near the shaft support 54. In this state, the window shade 30 is pulled out so as to cover almost the whole of the window 10, and the stay 32 at the leading end side in the pulling direction is attached to the upper frame portion 14c, so that the window shade 30 is maintained in the pulled-out state. Is done.

  When the window shade 30 is pulled out as described above, the winding shaft 40 is rotated relative to the urging-side support shaft 60, so that the spring is attached to the winding shaft 40 so as not to rotate relative thereto. The coil spring 82 is twisted between the connecting member 88 and the biasing support shaft 60. Accordingly, when the force for pulling out the window shade 30 is released, the take-up shaft 40 is rotated in the direction for taking up the window shade 30 by the force for eliminating the twist of the coil spring 82, and the window shade 30 is taken up by the take-up shaft 40. Rolled up. At this time, the winding shaft 40 is moved in the opposite direction to the initial state by screwing with the screw hole 42 s of the screw support bearing 42 at one end of the winding shaft 40, and returns to the initial position.

  Further, along with the movement of the winding shaft 40, the bearing 43 on the winding shaft 40 side moves around the biasing side support shaft 60, and the spring connecting member 88 moves in the shaft main body 41. At this time, since the elastic tube 86 is regulated so as to be positioned between the step portion 88s and the elastic ring 89, the state of covering the coil spring 82 is more reliably maintained.

  According to the vehicle window shade device 20 configured as described above, the window shade 30 is pulled out by screwing between the screw hole 42 s formed in one end portion of the winding shaft 40 and the screw portion 51 of the screw support shaft 50. The winding shaft 40 can be moved along the axial direction according to the degree, that is, the degree of rotation of the winding shaft 40. Thereby, when the winding shaft 40 is disposed along the edge portion 12a which is the first frame portion, one side frame portion which is the second frame portion which is inclined with respect to the edge portion 12a. It is possible to make the gap between the side edge portion on the side frame portion 14a side of the window shade 30 as small as possible.

  Further, since the screw support shaft 50 is made of resin, the weight can be reduced. At this time, since the center hole 52 is formed in the screw support shaft 50, the thickness of the screw support shaft 50 is made as small as possible to suppress resin sinking and the like, and the accuracy of the screw portion 51 formed in the screw support shaft 50 is improved. Can be achieved. In addition, since the reinforcing shaft 70 is inserted into the center hole 52, the strength of the screw portion 51 can be improved.

  Further, since the reinforcing shaft 70 is made of metal, the strength of the screw portion 51 can be further improved.

  Moreover, since the reinforcement shaft 70 is inserted through the shaft support portion 54 and into the center hole 52 with the head 72 of the reinforcement shaft 70 in contact with the shaft support portion 54 from the outside, the screw support shaft 50 is inserted. Can be more reliably supported in an orthogonal posture with respect to the shaft support portion 54, and the support strength of the winding shaft 40 by the screw support shaft 50 is further improved.

  Further, the cap receiving portion 56 is provided on the outer surface of the shaft support portion 54, and the cap member 74 attached to the cap receiving portion 56 presses the head 72 toward the center hole 52. 70 can be secured.

  Moreover, since the cap member 74 is inserted in the direction orthogonal to the axial direction of the reinforcing shaft 70 with respect to the cap receiving portion 56, the reinforcing shaft 70 can be more easily and reliably retained.

  In addition, since the reinforcing shaft 70B, the cap receiving part 56B, and the cap receiving part 56B are provided on the urging side support shaft 60 side, the same effects as described above can be obtained on the urging side support shaft 60 side. it can.

  Further, since the coil spring 82 is covered by the elastic tube 86, the contact sound between the coil spring 82 and the inner peripheral portion of the shaft main body 41 is suppressed. Further, in the configuration in which the urging side support shaft 60 and the coil spring 82 move with respect to the shaft main body 41 as in the present embodiment, the elastic tube 86 covering the coil spring 82 may be displaced. Therefore, as in the present embodiment, the elastic ring 89 is positioned and fixed to the biasing side support shaft 60, whereby the displacement of the elastic tube 86 toward the biasing side support shaft 60 can be suppressed. Thereby, the state in which the elastic tube 86 covers the coil spring 82 is more reliably maintained, and the contact sound by the coil spring 82 is more reliably maintained. Since the elastic ring 89 itself is formed of an elastomer such as a spring, it is difficult to generate a contact sound with the inner peripheral portion of the shaft main body 41. Further, the displacement of the elastic tube 86 to the inside of the shaft main body 41 is suppressed by the step portion 88 s of the spring connecting member 88.

  In the above embodiment, screw support shafts 50 may be provided on both sides of the winding shaft 40.

  Further, the urging mechanism 80 may be incorporated on the screw support shaft 50 side. Further, it may be incorporated only on the screw support shaft 50 side.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Window 12 Door panel 12a Edge 14 Window frame 14a, 14b Side frame 20 Vehicle window shade apparatus 30 Window shade 40 Winding shaft 41 Shaft body part 42 Screw support bearing 42s Screw hole 43 Bearing 43h Insertion hole 46 Case 50 Screw support Shaft 51 Screw part 52 Center hole 54, 54B Shaft support part 56, 56B Cap receiving part 60 Energizing side support shaft 62 Center hole 62g Annular groove 70, 70B Reinforcement shaft 72 Head part 74, 74B Cap member 80 Energizing mechanism 82 Coil spring 86 Elastic tube 88 Spring connecting member 89 Elastic ring

Claims (6)

A vehicle window shade device for covering and releasably covering a window,
A window shade capable of shielding the window;
A winding shaft capable of winding the window shade;
A pair of support shafts rotatably supporting both ends of the winding shaft;
With
A screw hole is formed in at least one end of the winding shaft,
At least one of the pair of support shafts is made of resin, and is a screw support shaft having a screw portion screwed into the screw hole and a center hole along the center axis of the screw portion,
A reinforcing shaft is disposed in the center hole,
A window shade device for a vehicle, wherein an urging mechanism for urging the take-up shaft in a direction to take up the window shade is provided on at least one end side of the take-up shaft. The vehicle window shade device according to claim 1,
The vehicle window shade device, wherein the reinforcing shaft is made of metal. The vehicle window shade device according to claim 1 or 2,
The screw support shaft is integrally formed with the shaft support portion in a projecting posture to rotatably support the winding shaft;
The vehicle window shade, wherein the reinforcing shaft is inserted through the shaft support portion into the center hole of the screw support shaft, and a head portion is formed on the reinforcement shaft so as to come into contact with the shaft support portion from the outside. apparatus. The vehicle window shade device according to any one of claims 1 to 3,
The screw support shaft is integrally formed with the shaft support portion in a projecting posture to rotatably support the winding shaft;
The reinforcing shaft is inserted through the shaft support portion into the center hole of the screw support shaft;
A cap receiving part is provided on the outer surface of the shaft support part,
A vehicle window shade device further comprising a cap member that presses the reinforcing shaft toward the center hole in a state of being attached to the cap receiving portion. The vehicle window shade device according to claim 4,
The window shade device for a vehicle, wherein the cap member is attached to the cap receiving portion by being inserted in a direction orthogonal to the axial direction of the reinforcing shaft with respect to the cap receiving portion. A vehicle window shade device according to any one of claims 1 to 5,
At least one of the pair of support shafts is an urging side support shaft inserted into at least one end of the winding shaft,
The biasing mechanism is inserted into the winding shaft with one end connected to the biasing support shaft in a relatively non-rotatable manner and the other end connected to the inside of the winding shaft in a relatively non-rotatable manner. A biasing member, and an elastic tube covering the biasing member,
A vehicle window shade device in which an elastic ring is positioned and fixed to the biasing side support shaft.

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