JP6451491B2 - Vehicle seat slide device - Google Patents

Description

  The present invention relates to a slide device for a passenger seat for mounting on a vehicle such as an automobile, an airplane, a ship, or a train.

  A vehicle seat that can move the seat in the front-rear direction is employed. There are various mechanisms for this movement, and one of them is one that moves the seat back and forth along the slide rail by winding a cable (see Patent Document 1 below). Specifically, the seat body was moved forward by winding the cable routed between the front end of the lower rail and the seat body onto the pulley, and was routed between the rear end of the lower rail and the seat body. The seat body is configured to move backward by winding the cable on a pulley.

JP-A-2005-247308

  In order to move the sheet main body in accordance with the rotation of the pulley, it is necessary to apply an appropriate tension to the cable so that the cable is wound around the pulley without delay in response to the rotation of the pulley. On the other hand, if the tension of the cable is too high, the support load at the portion that supports the cable becomes excessive.

  However, in practice, it is not easy to route the cable so as to give an appropriate tension to the cable, and the cable tension tends to vary.

  In view of such problems, an object of the present invention is to provide a vehicle seat in which the seat can be moved along the slide rail by winding a pulling member such as a cable routed between the seat and the floor around the pulley. In this case, the tension in the traction member is applied by another means, thereby suppressing variation in the tension of the traction member without increasing the difficulty level of the traction member wiring operation.

  According to a first aspect of the present invention, a traction member such as a cable routed between an occupant seating seat and a vehicle floor is wound around a pulley on the seat so that the seat is moved along a slide rail on the floor. A vehicle seat slide device that is movable, and includes a tension applying means that is provided on a routing path of the pulling member and applies a predetermined tension to the pulling member. A pulley that is in contact with the traction member on a surface, the rotation shaft is on the seat, and the rotation shaft is movable in a direction in which the length of the routing path of the traction member changes. Urging means for urging the rotating shaft in a direction to lengthen the routing path of the traction member.

  In the first invention, the moving direction of the seat is not limited to the front-rear direction. It may be in the left-right direction. Further, the pulling member is not limited to a cable. It may be a metal or resin band. Further, the pulley may also serve as a pulley that winds the traction member.

  According to the first aspect, since the tension in the pulling member is applied by the tension applying unit, the tension can be applied to the pulling member by the tension applying unit separately from the wiring operation of the pulling member. Therefore, it is possible to suppress variations in the tension of the traction member without increasing the difficulty level of the traction member wiring operation.

  According to a second aspect of the present invention, in the first aspect, the pulley is provided so as to be rotatable with respect to the seat, and the pulling member is fixed to the floor with both ends corresponding to both ends in the moving direction of the seat. An intermediate portion between both end portions is wound around the pulley, and the pulleys are provided in a pair so as to face each other, and each of the pulleys has the pulling members on both sides of the pulley on both sides of the pulley. The pulleys are biased toward each other, and the pulleys are movable in opposite directions to each other. The biasing means is disposed between the rotation shafts of the pulleys, and the rotation shafts are attached in directions approaching each other. Rush.

  According to the second invention, since the biasing means is provided between the pair of pulleys, the pair of pulleys can be biased together by one biasing means. Further, a space for fixing the urging means is not required on the seat, and the configuration can be simplified. Furthermore, the tension of the pulling members on both sides can be made uniform, and the winding operation of the pulling member around the pulley can be made smooth.

  According to a third aspect of the present invention, in the second aspect of the present invention, a rail is provided on the floor along the moving direction of the seat, the rail has a hook shape, and the path of the hook-shaped rail is in the moving direction of the seat. And each end on the floor side of the traction member is fixed to the inner bottom surface of the rail passage, and the pulleys are disposed above the rail passage and disposed on both sides of the pulleys. The traction member to be searched has an obtuse angle.

  According to the third invention, since each pulley is disposed outside the rail passage, it is possible to prevent the rail from becoming large. In addition, since the angle formed by the traction members arranged on both sides of each pulley is an obtuse angle, the pulley pulls when the pulley applies tension to the traction member as compared with the case where the angle is a right angle or an acute angle. The reaction force received from the member can be reduced, the axial load received by the pulley can be reduced, and the pulley can be reduced in weight.

It is a plane explanatory view of one embodiment of the present invention. It is side surface explanatory drawing of the said embodiment. It is the III-III sectional view taken on the line of FIG. It is a perspective view from diagonally backward of the drive mechanism in the said embodiment. It is a perspective view from the diagonal front of the drive mechanism in the said embodiment. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is explanatory drawing explaining the effect of the said embodiment. It is explanatory drawing explaining the movement state of the sheet | seat in the said embodiment.

  1-3 show an embodiment of the present invention. This embodiment shows an example in which the present invention is applied to an automobile seat (hereinafter simply referred to as a seat). The seat 10 in this case is a so-called captain seat, and is a long slide type seat in which the second row seat behind the front seat (not shown) is slidable in a traveling direction of the automobile at a relatively long distance. In each figure, each direction in the state which mounted | wore the motor vehicle with the arrow is shown by the arrow. In the following description, the description regarding the direction is made based on this direction.

  The seat 10 mainly includes a seat cushion 11 that supports the weight of the seated occupant and a seat back 12 that supports the back of the seated occupant from the back side. A pair of left and right slide rails 13 are provided on the lower floor 15 of the seat cushion 11, and the seat 10 is slidable in the front-rear direction along the slide rail 13. The slide rail 13 in this case is embedded in the floor 15 so that most of the slide rail 13 does not protrude from the floor 15 surface. Specifically, the floor 15 includes a body floor 15a made of an automobile body and a carpet 15b laid on the body floor 15a. The lower rail 13a constituting the slide rail 13 partially removes the carpet 15b. The removed portion is fixed on the body floor 15a. The lower portion of the upper rail 13b that is slidably movable back and forth with respect to the lower rail 13a is incorporated in the lower rail 13a, but the upper portion thereof is fixed to the lower portion of the seat cushion 11, so that it protrudes upward from the floor 15. ing. The upper surface of the lower rail 13a is covered with a resin rail cover 13c so that foreign matter does not enter the combined portion of the lower rail 13a and the upper rail 13b. A slit through which the protruding portion of the upper rail 13b can pass is formed at the center of the rail cover 13c, and the slit is formed long along the sliding direction so that the upper rail 13b can slide.

  A drive mechanism 20 for sliding the seat 10 back and forth is provided adjacent to the right side of the right slide rail 13 among the pair of left and right slide rails 13. The drive mechanism 20 includes a motor 21 serving as a power source, a pulley 50 that is rotationally driven by the motor 21, a cable (corresponding to a pulling member in the present invention) 60 wound around the outer peripheral surface of the pulley 50, and the like. Further, a hook-shaped rail 80 that is open on the upper side is provided on the right side of the lower rail 13a under the pulley 50, and the rail 80 is embedded in the floor 15 in parallel with the lower rail 13a. The drive mechanism 20 is covered with a shield 14 provided on the right side of the seat 10 so as not to be seen from the outside.

  Both ends of the cable 60 are fixed to the front and rear ends of the rail 80, and the pulley 50 is rotatably supported below the seat cushion 11 on the right side of the slide rail 13. Accordingly, when the pulley 50 that winds up the cable 60 is rotated, the position of the cable 60 that is extended between both ends of the rail 80 moves in the front-rear direction. The pulley 50 moves back and forth along the rail 80. As a result, the seat cushion 11 supporting the pulley 50 moves in the front-rear direction. This is schematically shown in FIG.

  Referring to FIG. 9, when the sheet 10 is in the position indicated by the solid line, when the pulley 50 is driven to rotate, the winding position of the cable 60 around the pulley 50 moves, and the sheet 10 is indicated by a virtual line. It shows moving to the position shown. If the rotation direction of the pulley 50 is reversed, the winding position of the cable 60 around the pulley 50 then moves in the opposite direction, and the seat 10 is a position indicated by an imaginary line. To the position indicated by the solid line.

  4 and 5 show an enlarged configuration around the pulley 50 in the drive mechanism 20. Hereinafter, details of the configuration of the drive mechanism 20 will be described with reference to FIGS.

  The pulley 50 is rotatably supported by a pulley bracket 51 fixed to the cushion frame of the seat cushion 11. Here, the pulley 50 is supported by the rotation shaft 41 and the support shaft 53 from both sides of the rotation axis. The rotation shaft 41 is coupled to be engaged with the pulley 50 in the rotation direction. When the rotation shaft 41 is driven to rotate by the motor 21, the pulley 50 is driven to rotate. On the other hand, the support shaft 53 is fixed to the pulley bracket 51 and rotatably supports the pulley 50.

  The rotating shaft 41 is connected to the reduction gear 30 that is rotationally driven by the motor 21 via the torque diode 40. The torque diode 40 is a well-known one, and the rotational driving force from the rotating shaft 31 in the reduction gear 30 is transmitted to the rotating shaft 41, but the rotating force is not transmitted from the rotating shaft 41 toward the rotating shaft 31. Has been. Therefore, when the motor 21 is driven and the rotation shaft 31 of the reduction gear 30 is driven to rotate, the torque diode 40 rotates the pulley 41 by rotating the rotation shaft 41. Therefore, the seat 10 is moved in the front-rear direction by the rotation drive of the motor 21 as described above. On the other hand, when the seat 10 is manually moved in the front-rear direction along the slide rail 13 in a state where the motor 21 is not driven, the pulley 50 is rotated by the cable 60. At this time, the rotating shaft 41 is also rotated together with the pulley 50. However, since the torque diode 40 does not transmit the rotating force of the rotating shaft 41 to the rotating shaft 31, the rotating shaft 41 is in a state in which the rotating shaft 31 does not rotate. Can rotate freely and does not hinder the rotation of the pulley 50. Therefore, the seat 10 can be slid back and forth by either the motor 21 or manually.

  A spiral groove 54 is formed on the outer peripheral surface of the pulley 50 so as to wind the cable 60 in parallel. The groove 54 is formed in such a size that more than half of the cross-sectional area of the cable 60 fits into the surface of the pulley 50. The cable 60 is wound around the groove 54 by four turns.

  Both ends of the cable 60 are fixed to the bottoms of the front and rear ends of the bowl-shaped rail 80 by bolts 61. The middle of the cable 60 is routed by pulleys (corresponding to tension applying means in the present invention) 71, 72 on both sides of the pulley 50. Have been guided. The pulleys 71 and 72 are rotatably supported separately on the pulley bracket 52 coupled to the lower side of the pulley bracket 51. At this time, the pulleys 71 and 72 guide the route so that most of the cable 60 from the pulley 50 toward both ends is accommodated in the bowl-shaped passage of the rail 80. That is, the pulleys 71 and 72 are disposed immediately above the rail 80. Further, the left and right positions of the pulleys 71 and 72 are shifted in the left and right direction with respect to the left and right positions of the cable 60 wound on the pulley 50 (see FIG. 3).

  6 and 7 show the attached state of the pulleys 71 and 72 in an enlarged manner. In the pulley bracket 52, a long hole 52a for supporting the pulleys 71 and 72 is formed as a through hole. On the other hand, stepped pins 71c, 72c are provided through the central holes of the pulleys 71, 72. The stepped pins 71c and 72c have their screw portions 71a and 72a passed through the long holes 52a, and fasten nuts 71b and 72b to the screw portions 71a and 72a. As a result, the pulleys 71 and 72 penetrated by the stepped pins 71 c and 72 c are slidable in the front-rear direction within the long hole 52 a of the pulley bracket 52.

  On the opposite side of the stepped pins 71c and 72c from the threaded portions 71a and 72a, hooking portions 71d and 72d having an annular groove are formed. Between the annular grooves of the hooking portions 71d and 72d, a coil spring (main 73 (corresponding to the tension applying means and the urging means in the invention) is stretched by hooking both ends thereof. Therefore, the pulleys 71 and 72 are urged by the coil spring 73 in a direction approaching each other (direction in which the cable 60 is routed longer), and the tension of the cable 60 is increased by the urging force of the coil spring 73. Yes.

  Thus, the tension in the cable 60 is urged by the coil spring 73 in the direction in which the relative positions of the pulleys 71 and 72 that guide the cable 60 routing path approach each other (the direction that lengthens the cable 60 routing path). Is enhanced by. Therefore, tension can be applied to the cable 60 independently of the cable 60 routing operation. Therefore, it is possible to suppress variations in the tension of the cable 60 without increasing the difficulty of the cable 60 routing operation.

  Moreover, since the coil spring 73 is provided between the pair of pulleys 71 and 72, the pair of pulleys 71 and 72 can be urged together by one coil spring 73. Further, a space for fixing the coil spring 73 is not required on the seat, and the configuration can be simplified. Furthermore, the tension of the cable 60 on both sides of the pulley 50 can be made uniform, and the winding operation of the cable 60 around the pulley 50 can be made smooth.

  FIG. 8 illustrates the operation of the present embodiment. Since the pulleys 71 and 72 are arranged outside the path of the rail 80 as indicated by solid lines, the pulleys 71 and 72 are indicated by virtual lines. Thus, compared with the case where it arrange | positions in the path | route of the rail 80, it can suppress that the rail 80 enlarges. In addition, since the angle θ formed by the cables 60 arranged on both sides of the pulleys 71 and 72 is an obtuse angle as shown by a solid line, the angle is a right angle or an acute angle as shown by an imaginary line. In comparison, the reaction force received from the cable 60 when the pulleys 71 and 72 apply tension to the cable 60 can be reduced, the axial load received by the pulleys 71 and 72 is reduced, and the pulleys 71 and 72 are reduced in weight. be able to.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, in the above embodiment, the tension urging means is constituted by a pair of pulleys provided on the floor side of the pulleys and a spring hung between the pulleys. You may make it provide the urging | biasing force of a spring. Even when a pair of pulleys is used as the tension urging means, a spring may be provided independently for each pulley. Furthermore, in the above embodiment, the present invention is applied to a car seat, but may be applied to a seat mounted on an airplane, a ship, a train, or the like.

DESCRIPTION OF SYMBOLS 10 Seat 11 Seat cushion 12 Seat back 13 Slide rail 13a Lower rail 13b Upper rail 13c Rail cover 14 Shield 15 Floor 15a Body floor 15b Carpet 20 Drive mechanism 21 Motor 30 Deceleration gear 31 Rotating shaft 40 Torque diode 41 Rotating shaft 50 Pulley 51 Pulley bracket 52 Pulley bracket 52a Long hole 53 Support shaft 54 Groove 60 Cable (traction member)
61 Bolts 71 and 72 Pulleys 71a and 72a Screw portions 71b and 72b Nuts 71c and 72c Stepped pins 71d and 72d Hooking portions 73 Coil springs (tension applying means)
80 rails

Claims (1)

A traction member such as a cable routed between a passenger seat and a vehicle floor is wound around a pulley on the seat, so that the seat can be moved along a slide rail on the floor. A vehicle seat slide device,
Provided on the routing path of the traction member, and provided with a tension applying means for applying a predetermined tension to the traction member;
The tension applying means includes
A pulley that is in contact with the traction member on an outer peripheral surface, the rotation shaft is on the seat, and the rotation shaft is movable in a direction in which the length of the routing path of the traction member is changed;
Urging means for urging the rotation shaft of the pulley in a direction in which the routing path of the pulling member is lengthened;
With
The pulley is provided to be rotatable with respect to the seat,
The pulling member is fixed to the floor with its both ends corresponding to both ends in the moving direction of the seat, and an intermediate portion between both ends is wound around the pulley,
A pair of the pulleys are provided opposite to each other, and each of the pulleys is biased on both sides on the floor side from the pulleys, on the side where the pulling members on both sides of the pulleys are brought closer to each other,
Each of the pulleys is movable in the opposite direction to each other,
The urging means is disposed between the rotation shafts of the pulleys, and urges the rotation shafts in directions approaching each other,
A rail is provided on the floor along the moving direction of the seat,
The rail has a bowl shape, and a path of the bowl-shaped rail is formed along the moving direction of the seat,
Each end of the traction member on the floor side is fixed to the inner bottom surface of the passage of the rail,
Each pulley is disposed above the rail passage, and
The vehicle seat sliding device in which the traction members arranged on both sides of each pulley are obtuse.

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