This application is based on and claims priority under 35 U.S.C. ยง119 to Japanese Patent Application 2011-096173, filed on Apr. 22, 2011, the entire content of which is incorporated herein by reference.
This disclosure generally relates to a sheet winding apparatus for a vehicle.
A known sheet winding apparatus for a vehicle is disclosed in JP2004-250225A (hereinafter referred to as Patent reference 1). The known sheet winding apparatus for the vehicle disclosed in the Patent reference 1 includes a fixed shaft, a winding shaft formed into a hollow cylindrical shape and rotatably supported at the fixed shaft, a sheet whose one end is secured to an outer peripheral portion of the winding shaft, and a torsion spring inserted between an outer peripheral surface of the fixed shaft and an inner peripheral surface of the winding shaft and biasing the winding shaft in a direction in which the sheet is wound up. The known sheet winding apparatus for the vehicle disclosed in the Patent reference 1 also includes a first soundproof tube which is provided with plural contacting protrusions contactable with an inner peripheral portion of the torsion spring and which is mounted on the outer peripheral surface of the fixed shaft. The known sheet winding apparatus for the vehicle disclosed in the Patent reference 1 also includes a second soundproof tube which is provided with plural contacting protrusions contactable with an outer peripheral portion of the torsion spring and which is mounted on the inner peripheral surface of the winding shaft. Thus, in a case where, for example, the torsion spring is torsionally deformed, the plural protrusions provided at the first soundproof tube or at the second soundproof tube, with which the torsion spring, for example, collides, are elastically deformed, and thus occurrence of abnormal noises is restricted.
According to the known sheet winding apparatus for the vehicle disclosed in the Patent reference 1, one of leg portions of the torsion spring is locked at a free end of the fixed shaft, and the other one of the leg portions of the torsion spring is locked at a supporting member that is fixed to the winding shaft so as to be integrally rotatable with the winding shaft. Anti-rotation locking of the supporting member relative to the winding shaft is achieved by a caulking process. Because the caulking process is included in a manufacturing process, manufacturing costs increase. Alternatively, strength of the winding shaft decreases as a result of performing the caulking.
An outer peripheral surface of the second soundproof tube is closely fitted to the inner peripheral surface of the winding shaft and an end portion of the second soundproof tube is tightly inserted between an outer peripheral surface of a bearing member that is fixed to the winding shaft so as to be integrally rotatable with the winding shaft and the inner peripheral surface of the winding shaft, and thus the rotation of the second soundproof tube relative to the winding shaft is locked. However, for example, the winding shaft and the second soundproof tube are fitted to each other by means of the fitting between the peripheral surfaces of the winding shaft and the second soundproof tube. Thus, anti-rotation locking of the second soundproof tube relative to the winding shaft may be insufficient.
A need thus exists for a sheet winding apparatus for a vehicle, which is not susceptible to the drawback mentioned above.
According to an aspect of this disclosure, a sheet winding apparatus for a vehicle includes a fixed shaft, a winding shaft formed into a tubular shape and rotatably supported at the fixed shaft, the winding shaft including a winding shaft-side fitting portion provided at an inner peripheral portion of the winding shaft and extending in an axial direction of the winding shaft, a sheet whose end portion is fixed to the winding shaft, a supporting member inserted into the winding shaft, a torsion spring including a coil portion inserted in the winding shaft between the fixed shaft and the supporting member in the axial direction of the winding shaft, the torsion spring includes leg portions engaged with the fixed shaft and with the supporting member respectively and biases the winding shaft in a winding-up direction of the sheet, a soundproof tube placed between the inner peripheral portion of the winding shaft and an outer peripheral portion of the coil portion, a supporting member-side fitting portion formed at the supporting member and engaging with the winding shaft-side fitting portion, thereby locking a rotation of the supporting member relative to the winding shaft, a tube-side fitting portion formed at the soundproof tube and engaging with the winding shaft-side fitting portion, thereby locking a rotation of the soundproof tube relative to the winding shaft, a holding portion formed at the supporting member and protruding in an axial direction of the supporting member in a direction of the torsion spring, and a position-setting portion provided at the soundproof tube in a predetermined range in a circumferential direction of the soundproof tube in a protruding manner in an axial direction of the soundproof tube in a manner that the position-setting portion faces the supporting member, the position-setting portion is folded back in the axial direction of the soundproof tube inwardly and covers an edge portion of the coil portion, the position-setting portion is sandwiched and held by the coil portion and the holding portion.
The foregoing and additional features and characteristics of this disclosure will become more apparent from the following detailed description considered with the reference to the accompanying drawings, wherein:
An embodiment of a sheet winding apparatus for a vehicle of this disclosure will be explained with reference to
As illustrated in
As illustrated in
On the other hand, as illustrated in
The bearing portion 24b of the fixed shaft 24 is rotatably inserted into one end portion of a winding shaft 26, whose axis line extends in the width direction, made of aluminum alloy extruded material and having a substantially hollow cylindrical shape. The rotating shaft 25 is fitted into the other end portion of the winding shaft 26 by insertion so as not to rotate relative to the winding shaft 26. Thus, the winding shaft 26 is rotatably supported at the brackets 13, that is, one end portion of the winding shaft 26 is rotatable about the bearing portion 24b of the fixed shaft 24 and the other end portion of the winding shaft 26 is rotatable about the bearing hole 15 via the rotating shaft 25.
One end portion of the sheet 21 is fixedly attached to an outer peripheral portion of the winding shaft 26 and the sheet 21 is wound around the outer peripheral portion of the winding shaft 26. Thus, the sheet 21 is wound out when the winding shaft 26 rotates in one direction (that is, a winding-out direction) and the sheet 21 is wound up when the winding shaft 26 rotates in an opposite direction (that is, a winding-up direction).
A supporting member 27 which is made of, for example, resin material and is formed into a substantially cylindrical shape is inserted and fitted into the winding shaft 26 at an intermediate portion in an axial direction of the winding shaft 26. Specifically, as illustrated in
As shown in
As illustrated in
A soundproof tube 29, which is made of, for example, extruded molding material and has a hollow, substantially cylindrical shape, is inserted and fitted into the winding shaft 26 to be positioned at an outer peripheral side of the coil portion 28a. Specifically, as illustrated in
As illustrated in
Further, as schematically illustrated in
Here, a manner of forming the position-setting portion 29b by folding back the protruding configuration P will be explained. As illustrated in
In the temporarily assembled state where the outer peripheral portion of the torsion spring 28 (the coil portion 28a), whose leg portions 28b and 28c are engaged at the fixed shaft 24 and at the supporting member 27, is inserted into the soundproof tube 29, the supporting member 27 and the soundproof tube 29 are fitted into the winding shaft 26 by insertion, and thus, the fixed shaft 24 and other temporarily assembled parts are assembled on the winding shaft 26.
Next, an operation of this embodiment will be explained. While the pair of shoes 23 together with the garnish 22 move along the pair of guide rails 12 in the front direction, the winding shaft 26 (the supporting member 27) rotates in the one direction against the biasing force of the torsion spring 28, and thus the sheet winding apparatus 20 winds out the sheet 21 that is in a wound-up state. Thus, the roof panel 11 is covered and shaded with the sheet 21. On the other hand, the sheet winding apparatus 20 allows the winding shaft 26 (the supporting member 27) to be rotated in the opposite direction by the biasing force of the torsion spring 28, and thus the pair of shoes 23 together with the garnish 22 move along the pair of guide rails 12 in the rear direction, thereby winding up the sheet 21 that is in a wound-out state (a deployed state).
At this time, a rotation of the supporting member 27 relative to the winding shaft 26 is locked by means of the engagement of the pair of winding shaft-side fitting portions 26a and the pair of supporting member-side fitting portions 27a. On the other hand, the rotation of the soundproof tube 29 relative to the winding shaft 26 is locked because the pair of winding shaft-side fitting portions 26a engages with the pair of tube-side fitting portions 29a, and because the position-setting portion 29b is sandwiched and held between the coil portion 28a and the second spring holding portion 27d. In addition, the soundproof tube 29 is locked from moving in the axial direction in the direction closer to the fixed shaft 24 because the position-setting portion 29b is sandwiched and held between the coil portion 28a and the second spring holding portion 27d.
As described in detail above, according to the embodiment, the following effects and advantages are attained. (1) According to the embodiment, the rotation of the supporting member 27 relative to the winding shaft 26 is locked by means of the engagement of the pair of winding shaft-side fitting portions 26a and the pair of supporting member-side fitting portions 27a. This eliminates the need of, for example, a caulking process, and thus reduces manufacturing workload or restricts a reduction in a strength of the winding shaft 26 which may be caused by the caulking process. On the other hand, the rotation of the soundproof tube 29 relative to the winding shaft 26 is locked more reliably because the pair of winding shaft-side fitting portions 26a engages with the pair of tube-side fitting portions 29a, and because the position-setting portion 29b is sandwiched and held between the coil portion 28a and the second spring holding portion 27d. In addition, the soundproof tube 29 is locked from moving in the axial direction in the direction closer to the fixed shaft 24 because the position-setting portion 29b is sandwiched and held by, that is, between the coil portion 28a and the second spring holding portion 27d. Thus, in the temporarily assembled state where the outer peripheral portion of the torsion spring 28, whose leg portions 28b and 28c are engaged at the fixed shaft 24 and at the supporting member 27, is inserted into the soundproof tube 29, when the supporting member 27 and the other temporarily assembled parts are inserted and fitted into the winding shaft 26, it is restricted that the soundproof tube 29 is positionally offset in the axial direction due to deformation of the torsion spring 28 caused by expansion and contraction thereof. Consequently, assemblability improves. It is restricted that the soundproof tube 29 is positionally offset in the axial direction due to a rotation of the winding shaft 26 or due to the deformation of the torsion spring 28, and thereby it is restricted that the soundproof tube 29 is caught in and rolled in the fixed shaft 24. Consequently, it is restricted that, for example, the winding shaft 26 becomes unable to rotate.
(2) According to the embodiment, when the supporting member 27 and the soundproof tube 29 are inserted and fitted into the winding shaft 26 in the temporarily assembled state where, for example, the outer peripheral portion of the torsion spring 28 (the coil portion 28a), whose leg portions 28b and 28c are engaged at the fixed shaft 24 and at the supporting member 27, is inserted into the soundproof tube 29, the protrusions 29c come to be elastically in contact with the inner peripheral portion of the winding shaft 26. Thus, a sliding resistance while the soundproof tube 29 is being inserted and fitted into the winding shaft 26 is reduced compared to a case where, for example, an entire outer peripheral portion of the soundproof tube 29 is in contact with the inner peripheral portion of the winding shaft 26. Consequently, the assemblability improves.
(3) According to the embodiment, in order to cut the protruding configuration P, which protrudes from the soundproof tube 29 in the axial direction and defines the position-setting portion 29b, out of the extrusion molding material W, the protruding configuration P is cut out in a state where the extrusion molding material W is folded along the guiding groove 29d. Accordingly, the protruding configuration P is easily defined or formed so that the range (the angular position) at which the protruding configuration P (the position-setting portion 29b) is to be formed is not positionally offset in the circumferential direction of the soundproof tube 29.
(4) According to the embodiment, in order to assemble the supporting member 27 on the winding shaft 26, in the temporarily assembled state, for example, where the outer peripheral portion of the torsion spring 28 (the coil portion 28a) is inserted into the soundproof tube 29, the leg portion 28c of the torsion spring 28 is engaged at the supporting member 27 in a manner that the portion of the guide portion 27e, the portion whose protruding length is smaller, comes closer to the protruding configuration P that protrudes from the soundproof tube 29 in the axial direction for forming the position-setting portion 29b. While maintaining the above-explained state, the supporting member 27 is rotated about the engaging position (the locking hole 27c) of the leg portion 28c of the torsion spring 28 and the supporting member 27 in the aforementioned rotational direction, and thus the protruding configuration P positioned on the rotational path of the second spring holding portion 27d is guided by the guide portion 27e and comes to be gradually folded inwardly back in the axial direction. As the supporting member 27 rotates, the second spring holding portion 27d comes to be inserted into the coil portion 28a, and thereby the protruding configuration P is folded back in the axial direction and comes to be sandwiched and held between the coil portion 28a and the second spring holding portion 27d so as to serve as the position-setting portion 29b. Accordingly, the position-setting portion 29b is defined or formed from the protruding configuration P, and is sandwiched and held between the coil portion 28a and the second spring holding portion 27d in a smooth manner.
(5) According to the embodiment, each of the winding shaft-side fitting portions 26a, the supporting member-side fitting portions 27a and the tube-side fitting portions 29a is formed into an extremely simple planar configuration. (6) According to the embodiment, the position-setting portion 29b (the protruding configuration P) is protrudingly provided so as to correspond to the angular position of one of the tube-side fitting portions 29a. Accordingly the position-setting portion 29b is used as a mark for positioning when inserting and fitting, for example, the soundproof tube 29 into the winding shaft 26.
(7) According to the embodiment, the rotation of the soundproof tube 29 relative to the winding shaft 26 is locked. Thus, it is restricted that an unintentional gap is generated between the winding shaft 26 and the soundproof tube 29 due to the aforementioned rotation, and thus it is restricted that abnormal noises are caused by the unintentional gap. It is restricted that the winding shaft 26 and the soundproof tube 29 are closely in contact with each other, which may lead to a difficulty in the assembly.
The aforementioned embodiment may be changed as follows. The guiding groove 29d of the soundproof tube 29 may be provided at a first angular position positioned in the circumferentially central portion of the position-setting portion 29b instead of the second angular position that faces the first angular position in the radial direction. Alternatively, the guiding groove 29d may be provided at both first and second angular positions.
In the aforementioned embodiment, a configuration of fitting or engagement of the winding shaft 26, the supporting member 27 and the soundproof tube 29 is an example. For example, each of the winding shaft-side fitting portions 26a, the supporting member-side fitting portions 27a and the tube-side fitting portions 29a may be provided at one position of the winding shaft 26, the supporting member 27 and the soundproof tube 29, respectively so that corresponding fitting portions fit or engage with each other.
In the aforementioned embodiment, the sheet 21 may be wound out of the winding shaft 26 by means of an electric operation or a manual operation. In the aforementioned embodiment, the sheet winding apparatus 20 may be supported at a front edge portion of the roof opening portion 10a and the sheet 21 may be wound out toward the rear direction. Alternatively, the sheet winding apparatus 20 may be provided at, for example, a windshield G (refer to
Next, technical ideas grasped from the aforementioned embodiment and from the other examples will be described below. (A) According to the sheet winding apparatus for the vehicle of the aforementioned embodiment, the winding shaft-side fitting portion 26a is defined by forming the inner peripheral portion of the winding shaft 26 into the planar shape, the supporting member-side fitting portion 27a is defined by forming the outer peripheral portion of the supporting member 27 into the planar shape, and the tube-side fitting portion 29a is defined by forming the outer peripheral portion of the soundproof tube 29 into the planar shape. According to the aforementioned structures, each of the winding shaft-side fitting portion 26a, the supporting member-side fitting portion 27a and the tube-side fitting portion 29a is formed into the extremely simple planar configuration.
According to the aforementioned embodiment, the sheet winding apparatus for the vehicle includes the fixed shaft 24, the winding shaft 26 formed into the tubular shape and rotatably supported at the fixed shaft 24, the winding shaft 26 including the winding shaft-side fitting portion 26a provided at the inner peripheral portion of the winding shaft 26 and extending in the axial direction of the winding shaft 26, the sheet 21 whose end portion is fixed to the winding shaft 26, the supporting member 27 inserted into the winding shaft 26, the torsion spring 28 including the coil portion 28a inserted in the winding shaft 26 between the fixed shaft 24 and the supporting member 27 in the axial direction of the winding shaft 26, the torsion spring 28 includes the leg portions 28b, 28c engaged with the fixed shaft 24 and with the supporting member 27 respectively and biases the winding shaft 26 in the winding-up direction of the sheet 21, the soundproof tube 29 placed between the inner peripheral portion of the winding shaft 26 and the outer peripheral portion of the coil portion 28a, the supporting member-side fitting portion 27a formed at the supporting member 27 and engaging with the winding shaft-side fitting portion 26a, thereby locking the rotation of the supporting member 27 relative to the winding shaft 26, the tube-side fitting portion 29a formed at the soundproof tube 29 and engaging with the winding shaft-side fitting portion 26a, thereby locking the rotation of the soundproof tube 29 relative to the winding shaft 26, the second spring holding portion 27d formed at the supporting member 27 and protruding in the axial direction of the supporting member 27 in the direction of the torsion spring 28, and the position-setting portion 29b provided at the soundproof tube 29 in the predetermined range in the circumferential direction of the soundproof tube 29 in a protruding manner in the axial direction of the soundproof tube 29 in a manner that the position-setting portion 29b faces the supporting member 27, the position-setting portion 29b is folded back in the axial direction of the soundproof tube 29 inwardly and covers an edge portion of the coil portion 28a, the position-setting portion 29b is sandwiched and held by the coil portion 28a and the second spring holding portion 27d.
According to the above-described structure, the rotation of the supporting member 27 relative to the winding shaft 26 is locked by means of the engagement of the pair of winding shaft-side fitting portions 26a and the pair of supporting member-side fitting portions 27a. This eliminates the need of, for example, the caulking process, and thus reduces the manufacturing workload or restricts the reduction in the strength of the winding shaft 26 which may be caused by the caulking process. On the other hand, the rotation of the soundproof tube 29 relative to the winding shaft 26 is reliably locked because the pair of winding shaft-side fitting portions 26a engages with the pair of tube-side fitting portions 29a, and because the position-setting portion 29b is sandwiched and held between the coil portion 28a and the second spring holding portion 27d of the supporting member 27. In addition, the soundproof tube 29 is locked from moving in the axial direction in the direction closer to the fixed shaft 24 because the position-setting portion 29b is sandwiched and held between the coil portion 28a and the second spring holding portion 27d. Thus, for example, in the temporarily assembled state where the outer peripheral portion of the torsion spring 28, whose leg portions 28b and 28c are engaged at the fixed shaft 24 and at the supporting member 27, is inserted into the soundproof tube 29, when the supporting member 27 and the other temporarily assembled parts are inserted and fitted into the winding shaft 26, it is restricted that the soundproof tube 29 is positionally offset in the axial direction due to the deformation of the torsion spring 28 caused by the expansion and contraction thereof. Consequently, the assemblability improves. It is restricted that the soundproof tube 29 is positionally offset in the axial direction due to the rotation of the winding shaft 26 or due to the deformation of the torsion spring 28, and thereby it is restricted that the soundproof tube 29 is caught in and rolled in the fixed shaft 24. Consequently, it is restricted that, for example, the winding shaft 26 becomes unable to rotate.
According to the above-described structure, the sheet winding apparatus for the vehicle, where the increase in the manufacturing load is restricted, and where the rotation of the soundproof tube 29, which is interposed between the inner peripheral portion of the winding shaft 26 and the outer peripheral portion of the torsion spring 28, relative to the winding shaft 26 is more reliably locked, is provided.
According to the aforementioned embodiment, the sheet winding apparatus for the vehicle further includes the protrusion 29c protrudingly provided at the outer peripheral portion of the soundproof tube 29 and being elastically in contact with the inner peripheral portion of the winding shaft 26, the protrusion 29c is provided at the other portion of the outer peripheral portion of the soundproof tube 29 than the tube-side fitting portion 29a.
According to the above-described structure, for example, when the supporting member 27 and the soundproof tube 29 are inserted and fitted into the winding shaft 26 in the temporarily assembled state where the outer peripheral portion of the torsion spring 28, whose leg portions 28b and 28c are engaged at the fixed shaft 24 and at the supporting member 27, is inserted into the soundproof tube 29, the protrusions 29c come to be elastically in contact with the inner peripheral portion of the winding shaft 26. Thus, the sliding resistance while the soundproof tube 29 is being inserted and fitted into the winding shaft 26 is reduced compared to a case where, for example, the entire outer peripheral portion of the soundproof tube 29 is in contact with the inner peripheral portion of the winding shaft 26. Consequently, the assemblability improves.
According to the aforementioned embodiment, the sheet winding apparatus for the vehicle further includes the guiding groove 29d provided at the inner peripheral portion of the soundproof tube 29 and extending in the axial direction of the soundproof tube 29, the guiding groove 29d is provided at least one of the first angular position positioned at the central portion of the position-setting portion 29b in the circumferential direction of the soundproof tube 29 and the second angular position facing the first angular position in the radial direction of the soundproof tube 29.
According to the above-described structure, in order to cut the protruding configuration P, which protrudes from the soundproof tube 29 in the axial direction and defines or forms the position-setting portion 29b, out of the extrusion molding material W from which the soundproof tube 29 is made, the protruding configuration P is cut out in a state where the extrusion molding material W is folded along the guiding groove 29d. Accordingly, the protruding configuration P is easily defined or formed without causing the positional offset, in the circumferential direction of the soundproof tube 29, of the range (the angular position) at which the protruding configuration P (the position-setting portion 29b) is to be formed.
According to the aforementioned embodiment, the second spring holding portion 27d includes the guide portion 27e of which protruding length in the axial direction of the guide portion 27e toward the torsion spring 28 gradually decreases toward the rotational direction in which the guide portion 27e rotates about the locking hole 27c of the leg portion 28c of the torsion spring 28 and the supporting member 27 to move away from the position-setting portion 29b.
According to the above-described structure, for example, in the temporarily assembled state where the outer peripheral portion of the torsion spring 28 is inserted into the soundproof tube 29, the corresponding leg portion of the torsion spring 28 is engaged at the supporting member 27 in a manner that the portion of the guide portion 27e, the portion whose protruding length is smaller, comes closer to the protruding configuration P that protrudes from the soundproof tube 29 in the axial direction for forming the position-setting portion 29b. While maintaining the above-explained state, the supporting member 27 is rotated about the locking hole 27c of the corresponding leg portion of the torsion spring 28 and the supporting member 27 in the rotational direction, and thus the protruding configuration P positioned on the rotational path of the second spring holding portion 27d is guided by the guide portion 27e and comes to be gradually folded inwardly back in the axial direction. As the supporting member 27 rotates, the second spring holding portion 27d comes to be inserted into the coil portion 28a, and thereby the protruding configuration P folded back in the axial direction comes to be sandwiched and held between the coil portion 28a and the second spring holding portion 27d. Accordingly, the position-setting portion 29b is defined or formed from the protruding configuration P, and is sandwiched and held between the coil portion 28a and the second spring holding portion 27d in a smooth manner.
The principles, preferred embodiment and mode of operation of the present invention have been described in the foregoing specification. However, the invention which is intended to be protected is not to be construed as limited to the particular embodiments disclosed. Further, the embodiments described herein are to be regarded as illustrative rather than restrictive. Variations and changes may be made by others, and equivalents employed, without departing from the spirit of the present invention. Accordingly, it is expressly intended that all such variations, changes and equivalents which fall within the spirit and scope of the present invention as defined in the claims, be embraced thereby.
Number | Date | Country | Kind |
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2011-096173 | Apr 2011 | JP | national |