JP6676006B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device provided in a vehicle.

  2. Description of the Related Art A seat slide device is a device that enables a seat (seat) provided in a vehicle to move in a front-rear direction. The seat slide device has a lower rail fixed to the floor of the vehicle and an upper rail fixed to the bottom of the seat, and has a configuration in which the upper rail is movably supported with respect to the lower rail.

  In a normal state, the movement of the upper rail with respect to the lower rail is restricted, that is, the locked state. Only when the occupant operates the lever and the locked state is released, the seat can be moved in the front-rear direction together with the upper rail.

  In the seat slide device described in Patent Literature 1 below, when the seat is moved in the front-rear direction in the unlocked state, the sliding resistance when moving forward is smaller than the sliding resistance when moving backward. It is configured to be large. For this reason, even when the lower rail is slightly inclined downward toward the front side, it is possible to prevent a phenomenon in which the seat slides forward by its own weight due to the inclination. . That is, the stability of the sliding movement in the unlocked state can be improved.

International Publication No. WO 2016/009495

  Incidentally, the operation of moving the unlocked seat back and forth may be performed with the occupant seated on the seat, or may be performed with the occupant not seated. In the former case, if the moving speed of the seat becomes too high, the occupant may feel uneasy. For this reason, it is preferable that the sliding resistance during the movement is increased to some extent so that the moving speed of the sheet is appropriately suppressed. On the other hand, in the latter case, it is preferable that the sliding resistance during the movement is relatively low so that the occupant can perform the operation of moving the seat with a small force.

  Further, even when the occupant moves the seat back and forth with the occupant seated, if the occupant is a child, the sliding resistance at the time of movement is set so that even a weak child can easily move the seat. A lower one is preferred. As described above, the preferable magnitude of the sliding resistance during the movement of the sheet differs depending on the situation.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a seat slide device capable of changing a sliding resistance when a sheet is slid according to a situation.

  In order to solve the above problems, a seat slide device according to the present invention is a seat slide device provided in a vehicle, and a lower rail fixed to a floor of the vehicle, and a lower rail fixed to a seat of the vehicle and moved with respect to the lower rail. And an upper rail supported in a possible state. The upper rail is provided with a sliding member that comes into contact with the sliding surface of the lower rail from above, and when the upper rail is moved, the sliding resistance received by the sliding member depends on the vertical load received by the seat. It is configured to change.

  In the seat sliding device having such a configuration, a sliding member is provided on the upper rail as a member for generating sliding resistance when moving the seat. The sliding member is in contact with the sliding surface of the lower rail from above. The sliding resistance at the time of moving the seat is generated as a sliding resistance received by the sliding member when the upper rail is moved, that is, a frictional force. The sliding resistance changes depending on the vertical load applied to the sheet.

  Therefore, for example, when the occupant moves the seat in a state where the occupant is not seated on the seat, the vertical load applied to the seat is reduced, and the sliding resistance applied to the sliding member is also reduced. Similarly, when a light child is seated, the load on the seat in the vertical direction also decreases, and the sliding resistance on the sliding member also decreases. On the other hand, when an adult with a heavy weight is seated, the vertical load applied to the seat increases, and the sliding resistance applied to the sliding member also increases.

  As described above, in the seat slide device having the above configuration, the sliding resistance when the seat is slid can be appropriately changed according to the situation.

  ADVANTAGE OF THE INVENTION According to this invention, the seat slide apparatus which can change the sliding resistance at the time of sliding a sheet according to a situation is provided.

It is a figure showing the whole shape of the seat slide device concerning a 1st embodiment of the present invention. FIG. 2 is a diagram illustrating an internal structure of the seat slide device illustrated in FIG. 1. FIG. 2 is a cross-sectional view for explaining a function of a lock member of the seat slide device shown in FIG. 1. It is sectional drawing for demonstrating the function of a movable member. It is sectional drawing for demonstrating the function of a movable member. It is a perspective view which shows the shape of a movable member and a slider. It is a figure for explaining sliding resistance at the time of sliding a sheet. It is a figure showing the whole shape of the seat slide device concerning a 2nd embodiment of the present invention. It is a figure for explaining sliding resistance at the time of sliding a sheet. It is a figure showing the internal structure of the seat slide device concerning a 3rd embodiment of the present invention. It is a figure showing the internal structure of the seat slide device concerning a 3rd embodiment of the present invention. It is a figure showing the internal structure of the seat slide device concerning a 3rd embodiment of the present invention. It is a figure showing the shape of the part except the lower rail in the seat slide device concerning a 4th embodiment of the present invention. It is a figure showing the shape of the part except the lower rail in the seat slide device concerning a 4th embodiment of the present invention. It is a figure showing the shape of the part except the lower rail in the seat slide device concerning a 4th embodiment of the present invention. It is a figure showing composition of a plate member and a slide member of a seat slide device concerning a 4th embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description will be omitted.

  The configuration of the seat slide device 100 according to the first embodiment of the present invention will be described mainly with reference to FIG. The seat slide device 100 is provided between a floor of a vehicle and a seat (both not shown), and supports the seat so as to be movable (slidable) in the front-rear direction. The seat slide device 100 has a lower rail 1 and an upper rail 2. The combination of the lower rail 1 and the upper rail 2 is provided in two sets for one sheet.

  The lower rail 1 is a member fixed to the floor of the vehicle. The two lower rails 1 provided below one seat are provided so as to be aligned in the left-right direction with their respective longitudinal directions along the front-rear direction of the vehicle.

  In FIG. 1, the x-axis is set as the direction from the rear side to the front side of the vehicle as the x direction. The y-axis is set as the direction from the right side to the left side of the vehicle as the y direction. Further, the z-axis is set with the direction from the lower side to the upper side of the vehicle as the z-direction. In the following drawings, the x-axis, the y-axis, and the z-axis are similarly set.

  The upper rail 2 is a member fixed to a vehicle seat. The upper rail 2 is fixed to the bottom surface of the seat. The two upper rails 2 fixed to one seat are provided so as to be arranged in the left-right direction with their respective longitudinal directions along the front-rear direction of the vehicle. The upper rail 2 is supported movably along the x-axis with respect to the lower rail 1 provided below the upper rail 2.

  The configuration of the lower rail 1 will be described. As shown in FIGS. 3A and 3B, the lower rail 1 is entirely formed of a metal plate. The lower rail 1 has a bottom plate 3, a side plate 4, an upper plate 5, and a mouth plate 6.

  The bottom plate portion 3 is a portion of the lower rail 1 closest to the −z direction, and is a portion directly fixed to the floor. The bottom plate 3 has a substantially horizontal flat plate shape as a whole. The side plate portion 4 is a portion formed to extend in the z direction from each of the y-direction end portion and the −y-direction side end portion of the bottom plate portion 3. FIG. 1A shows a state in which a part of the side plate portion 4 is cut away so that the arm plate portion 14 and the like disposed inside the lower rail 1 can be seen.

  The upper plate portion 5 is a portion formed so as to extend from the end in the z direction of each side plate portion 4 toward the center in the y direction. The upper plate portion 5 is provided along a horizontal plane, and faces the bottom plate portion 3. The surface on the −z direction side, that is, the surface on the lower side of the upper plate portion 5 is a contact surface 5a with which a movable member 29 described later contacts. Note that FIG. 1B shows a state in which a part of the upper plate portion 5 is cut away so that an arm plate portion 14 and the like (described later) disposed inside the lower rail 1 can be seen.

  The mouth plate portion 6 is a portion formed to extend in the −z direction from an end of the upper plate portion 5 opposite to the side plate portion 4. The respective mouth plate portions 6 are separated from each other, and each faces the side plate portion 4. A gap is formed between the end portion on the −z direction side of the mouth plate portion 6 and the bottom plate portion 3.

  A plurality of rectangular openings 10 are formed on the side of the pair of mouth plate portions 6 arranged on the y direction side. As shown in FIG. 1A, the openings 10 are formed so as to be arranged in a line along the x direction. The opening 10 is a hole through which a claw 18a of the lock member 18 described later is inserted.

  In the space formed inside the lower rail 1, the space surrounded by the bottom plate 3, the side plate 4, the upper plate 5, and the mouth plate 6 is a space 9 in FIGS. 3 (a) and 3 (b). It is shown. A space sandwiched between the bottom plate 3 and the pair of mouth plates 6 is shown as a space 7 in FIGS. Further, an opening sandwiched between the pair of upper plate parts 5, that is, an opening formed on the upper end side of the space 7, is shown as an opening 8 in FIGS.

  The configuration of the upper rail 2 will be described. As shown in FIGS. 3A and 3B, the upper rail 2 is formed by combining two metal plates 11. The upper rail 2 has a side plate portion 13 and an arm plate portion 14 in a −z direction side portion thereof.

  The side plate portion 13 is a portion of the metal plate 11 that is inserted into the space 7 from the opening 8. The side plate portion 13 is provided so that most of the side plate portion 13 is parallel to the mouth plate portion 6 and faces the mouth plate portion 6. A plurality of rectangular openings 13a are formed on the side of the pair of side plate portions 13 arranged on the y direction side. The openings 13a are formed so as to be arranged in a line along the x direction. The shape and arrangement interval of each opening 13a are substantially equal to the shape and arrangement interval of opening 10. The opening 13 a is a hole through which the claw portion 18 a of the lock member 18 is inserted as in the opening 10. Note that the space sandwiched between the pair of side plate portions 13 is shown as the space 12 in FIGS.

  The vicinity of the end on the −z direction side of the side plate portion 13 is bent so as to expand outward along the y-axis. The arm plate portion 14 is a portion formed to extend from the bent portion in the space 9 toward the z direction. The arm plate portion 14 is provided in parallel with the mouth plate portion 6 so as to face the mouth plate portion 6 in the space 9. A plurality of rectangular openings 14a are formed on a side of the pair of arm plate portions 14 arranged on the y direction side. The openings 14a are formed so as to be arranged in a line along the x direction. The shape and arrangement interval of each opening 14 a are equal to the shape and arrangement interval of opening 10. Further, the x coordinate of the position where each opening 14a is formed is equal to the x coordinate of the position where the opening 13a is formed in the side plate portion 13. The opening 14a is a hole through which the claw 18a of the lock member 18 is inserted, similarly to the openings 10 and 13a.

  A sliding member 15 is fixed to a surface of the arm plate portion 14 facing the side plate portion 4. The sliding member 15 is a plate-shaped member formed of resin, and has a trapezoidal shape when viewed from the y direction. The lower surface 15S of the sliding member 15 is a flat surface and is a portion that becomes the base of the trapezoid. The lower surface 15 </ b> S protrudes further below the lower end of the arm plate portion 14. The lower surface 15 </ b> S is in a state of being in contact with the upper surface of the bottom plate 3 as a whole.

  A shaft SH which is a columnar member is fixed to the side plate portion 4. The shaft SH is provided so as to protrude outward from the side plate portion 4 with its central axis along the y-axis. Each sliding member 15 is formed with a circular through-hole, and the shaft SH is inserted into the through-hole. That is, each sliding member 15 is fixed to the side plate portion 4 of the upper rail 2 by being fitted into the shaft SH from the side.

  The sliding member 15 may be entirely formed of resin. However, only the portion that contacts the upper surface of the bottom plate 3 (a sliding surface 3S described later) is formed of resin, and other portions are formed. May be formed of another material.

  As shown in FIG. 1B, two sliding members 15 are arranged on the arm plate portion 14 on the y direction side so as to be arranged in the x direction. On the other hand, on the arm plate portion 14 on the −y direction side, one sliding member 15 is disposed at a position that is the center in the x direction. The upper rail 2 is supported from below by these three sliding members 15. Thus, a plurality of sliding members 15 are provided along the moving direction (x direction) of the upper rail 2.

  In the following description, a portion of the upper surface of the bottom plate portion 3 that contacts the lower surface 15S of the sliding member 15 is referred to as a “slidable surface 3S”. In addition, of the three sliding members 15, the one arranged on the x-direction side is also referred to as “sliding member 151”, and the one arranged at the center is also referred to as “sliding member 152”. Those arranged on the −x direction side are also referred to as “sliding members 153”.

  Each sliding member 15 is in contact with the sliding surface 3S of the lower rail 1 from above. When the seat moves in the front-rear direction, each sliding member 15 moves along the x-axis while sliding on the sliding surface 3S. At that time, since a frictional force is generated between the lower surface 15S and the slidable surface 3S, the upper rail 2 moves while receiving a sliding resistance caused by the frictional force. The effect of providing such a sliding member 15 will be described later.

  The lock member 18 will be described. The lock member 18 is a member that performs an operation of switching between a locked state in which the movement of the upper rail 2 is restricted and an unlocked state in which the movement of the upper rail 2 is permitted. FIG. 3A shows a locked state, and FIG. 3B shows an unlocked state. As shown in both figures, the lock member 18 is formed of a bent metal plate. The lock member 18 is attached via a bracket 17 to one of the pair of metal plates 11 arranged on the y direction side. The bracket 17 supports the lock member 18 in a rotatable state by a rotation shaft 19 parallel to the x-axis.

  The lock member 18 has a claw portion 18a and an operation portion 18b. A plurality of claw portions 18 a are formed at the end of the lock member 18. Each claw portion 18a has a strip shape and is arranged in a line along the x-axis. The width (dimension in the x direction) of each claw portion 18a is slightly smaller than the width of each of the openings 13a, 10 and 14a. Further, the arrangement interval of the claw portions 18a is equal to the arrangement interval of the openings 10 and the like. As shown in FIG. 3A, in the locked state, the claw portion 18a penetrates all of the openings 13a, 10 and 14a. As a result, the movement of the upper rail 2 with respect to the lower rail 1 is restricted.

  The operation portion 18b is a portion formed at an end of the lock member 18 opposite to the claw portion 18a with the rotation shaft 19 interposed therebetween. A handle 20 which is a part operated by an occupant is connected to the operation unit 18b. When the occupant operates the handle 20 from the locked state of FIG. 3A, the lock member 18 rotates around the rotation shaft 19, and the claw 18a is pulled out of the openings 13a, 10 and 14a. That is, an unlocked state is obtained (FIG. 3B). As a result, the restriction on the movement of the upper rail 2 with respect to the lower rail 1 is released, and the upper rail 2 can move along the x-axis.

  As shown in FIGS. 1A and 1B, one end of a coil spring 21 is connected to the lock member 18 in the vicinity of the operation portion 18b. The other end of the coil spring 21 is connected near the end of the upper rail 2 on the z direction side. The operating portion 18b is urged in the z direction by the coil spring 21. Therefore, when the occupant is not operating the handle 20, the state where the claw portion 18a is inserted through the opening 13a or the like, that is, the locked state of FIG. 3A is maintained.

  Subsequently, an internal configuration of the seat slide device 100 will be described mainly with reference to FIG. FIGS. 2A and 2B show a part of the pair of metal plates 11 arranged on the y-direction side and a part of the lower rail 1 in the y-direction side (side plate portion 4, upper plate portion). 5, a part of the mouth plate portion 6) is cut away. FIG. 2A shows a locked state, and FIG. 2B shows an unlocked state.

  A pair of levers 22 are provided at positions on both sides of the lock member 18 along the x-axis. Each lever 22 is a substantially flat member, and is attached to the metal plate 11 via the rotating shaft 23 with its normal direction along the y-axis. The rotation axis 23 is an axis along the y-axis. The lever 22 is attached so as to be rotatable around a rotation shaft 23. As shown in FIG. 3, the lever 22 is accommodated in a gap formed between the pair of metal plates 11. As shown in FIG. 2, the shapes of the respective levers 22 are symmetrical to each other.

  The lever 22 has an upper arm part 24, a transmission part 24a, and a lower arm part 25. The upper arm portion 24 is a portion at the z-side end of the lever 22 that further projects toward the z-direction. One end of a coil spring 28 is connected to the upper arm 24 of each lever 22. Due to the coil springs 28, the upper arms 24 receive a force in a direction approaching each other.

  The transmission portion 24a is a portion that protrudes toward the lock member 18 at a position lower than the upper arm portion 24. In the locked state of FIG. 2A, the transmission portion 24a and the lock member are separated from each other. The upper arms 24 are brought closer to each other by the force of the coil spring 28.

  The lower arm portion 25 is a portion protruding further toward the −z direction side at the −z side end of the lever 22. One end of a slider 26 is rotatably connected to each lower arm 25. The slider 26 is a rod-shaped member arranged with its longitudinal direction along the x-axis. A movable member 29 is provided at an end of the slider 26 opposite to the lower arm 25. Specific configurations of the slider 26 and the movable member 29 will be described later.

  As shown in FIG. 2B, when the operating portion 18b of the lock member 18 is lifted in the z-direction to be in the unlocked state, the lock member 18 contacts the transmission portion 24a, and the transmission portion 24a is lifted together with the lock member 18. Can be As a result, the upper arms 24 move away from each other while resisting the force of the coil spring 28. Further, since the lever 22 rotates, the lower arms 25 move in directions approaching each other. As a result, each slider 26 and movable member 29 move toward the lock member 18 side. When returning from the unlocked state to the locked state, each slider 26 and movable member 29 move in a direction away from the lock member 18.

  The configuration of the slider 26 and the movable member 29 will be described with reference to FIGS. Although the actual shapes of the slider 26 and the movable member 29 are the shapes shown in the perspective view of FIG. 6B, the shapes are schematically shown in FIGS. FIG. 6A is an exploded view showing a state in which a part of the movable member 29 (a hard member 35 described later) has been removed.

  As shown in FIGS. 6A and 6B, in the present embodiment, most of the movable member 29 (excluding the hard member 35) and the slider 26 are integrally formed of resin. The movable member 29 has an intermediate portion 30 and an arm portion 31.

  The intermediate portion 30 is a portion connected to the end of the slider 26 and supports the pair of arms 31. As shown in FIGS. 4A and 4B, the intermediate portion 30 (and the slider 26) is housed in the space 7.

  The arm portion 31 is provided on both the y direction side and the −y direction side of the intermediate portion 30. Each of the arm portions 31 and the intermediate portion 30 are connected by a support portion 301 extending along the y-axis from an end of the intermediate portion 30 on the −z direction side. As shown in FIGS. 4A and 4B, each arm 31 is housed in the space 9. Each support portion 301 is arranged at a position between the end of the mouth plate portion 6 on the −z direction side and the bottom plate portion 3.

  In FIGS. 4A and 4B and FIGS. 6A and 6B, a groove-shaped space surrounded by the arm portion 31, the support portion 301, and the intermediate portion 30 is shown as the passage 32. The mouth plate 6 of the lower rail 1 is accommodated in the passage 32.

  A through hole 33 having a rectangular cross section is formed in the arm portion 31 so as to extend substantially along the x-axis. The guide portion 16 formed at the end of the arm plate portion 14 is inserted into the through hole 33. As shown in FIGS. 5A and 5B, the dimension (width) of the guide portion 16 along the z-axis is smaller than other portions of the arm plate portion 14. The longitudinal direction of the guide portion 16 is inclined with respect to the x-axis so that the guide portion 16 approaches the upper plate portion 5 as it approaches the tip end side. An end surface on the z direction side of the guide portion 16 is an inclined surface 16 a formed on a part of the upper rail 2. The inclined surface 16a is a surface that is inclined with respect to the horizontal plane so as to move toward the z direction as the distance from the lock member 18 increases.

  The inner wall surface of the through hole 33 is substantially parallel to the surface of the guide portion 16 facing the inner wall. For this reason, the inner wall surface (that is, the top surface) of the through hole 33 on the z direction side is a surface that is inclined similarly to the inclined surface 16a. The same applies to the inner wall surface (that is, the bottom surface) of the through hole 33 on the −z direction side.

  In the arm 31, a through hole 31 a penetrating in the z direction is formed at a position opposite to the intermediate portion 30 with the through hole 33 interposed therebetween. The portion closer to the side plate portion 4 than the through hole 31a is an elastic wall 34. The elastic wall 34 is in contact with the inner wall surface of the side plate portion 4.

  Before the movable member 29 and the slider 26 are housed inside the lower rail 1, the width of the movable member 29 in the y direction is slightly larger than the width of the space sandwiched between the pair of side plate portions 4. I have. Therefore, when the movable member 29 and the slider 26 are accommodated inside the lower rail 1, the respective elastic walls 34 are elastically deformed toward the intermediate portion 30 side. Further, for the same reason, the support portion 301 is also slightly elastically deformed. Since most of the movable member 29 is formed of resin, the movable member 29 is configured to be able to absorb an error in dimensional accuracy by its elastic deformation.

  FIGS. 4 (a) and 5 (a) show a locked state, and FIGS. 4 (b) and 5 (b) show an unlocked state. In the unlocked state shown in FIG. 4B and the like, a gap is formed between the movable member 29 and the inner wall surface of the upper plate 5 (hereinafter, referred to as “contact surface 5a”). ing. That is, the movable member 29, which is a member held by the upper rail 2, is separated from the contact surface 5 a, which is a part of the lower rail 1. Therefore, no frictional force or the like is generated between the movable member 29 and the contact surface 5a, and the lower rail 1 can move smoothly along the x-axis.

  When the occupant operates the handle 20 to switch from the unlocked state to the locked state, the movable member 29 moves in a direction away from the lock member 18 as described above. At this time, as shown in FIG. 5A, since the movable member 29 moves along the inclined surface 16a, the gap between the movable member 29 and the abutted surface 5a gradually decreases. Eventually, it becomes zero. At this time, the movable member 29 is sandwiched between the inclined surface 16a and the abutted surface 5a like a wedge, and is in a state of being abutted and pressed against the abutted surface 5a. As a result, a state occurs in which a force along the z direction and a frictional force along the x direction are acting between the movable member 29 and the contact surface. Thereby, rattling (relative displacement along the z-axis) between the lower rail 1 and the upper rail 2 is suppressed.

  As described above, in the present embodiment, an interlocking mechanism (a mechanism including the lever 22, the slider 26, and the guide portion 16) that moves the movable member 29 along the moving direction of the upper rail 2 in conjunction with the movement of the lock member 18. It has. When the interlocking mechanism moves the movable member 29, the movable member 29 is guided along the inclined surface 16a formed on the upper rail 2, so that the distance between the movable member 29 and the contact surface 5a changes. Configuration. With such a configuration, it is possible to smoothly move the upper rail 2 in the unlocked state, but it is possible to suppress rattling of the upper rail 2 in the locked state.

  When the deformation of the movable member 29 causes almost no problem, the entire movable member 29 may be formed of resin. However, when the entire movable member 29 is formed of resin, a relatively soft resin is sandwiched between the inclined surface 16a and the contact surface 5a in the locked state. When the vehicle travels in this state, the movable member 29 made of resin is deformed by the influence of vibration, and may be pushed deeper between the inclined surface 16a and the contact surface 5a. In this case, the movable member 29 is sandwiched between the inclined surface 16a and the contact surface 5a with a strong force. After such a state, when the occupant attempts to switch from the locked state to the unlocked state by operating the steering wheel 20, the steering wheel 20 is strongly affected by the movable member 29 as described above. The force required for the operation of the vehicle, that is, the force to be applied by the occupant increases. As a result, the occupant may feel uncomfortable.

  Further, depending on how the movable member 29 is deformed or bent due to the vibration of the vehicle, a gap is generated between the movable member 29 and the abutted surface 5a, and an abnormal noise is generated due to the rattling of the upper rail 2. There is also a possibility. As a result, the occupant may be uncomfortable.

  Therefore, in the present embodiment, the above problem is solved by forming a part of the movable member 29 that is sandwiched between the inclined surface 16a and the abutted surface 5a with a member that is harder than the other parts. Has been resolved.

  As shown in FIG. 6A, a through-hole 310 is formed in a portion of the arm portion 31 on the z-direction side of the through-hole 33 along the z-axis. The through hole 310 is connected to the inside of the through hole 33. The hard member 35 is fitted into the through hole 310 from the z direction side. The through hole 310 is a stepped hole, and the hard member 35 does not fall into the inside of the through hole 33. In the present embodiment, the hard member 35 is formed of metal (harder than resin). The surface 351 on the z direction side of the hard member 35 faces the contact surface 5 a of the lower rail 1. That is, the surface 351 of the hard member 35 is a portion that comes into contact with the contact surface 5a in the locked state.

  Further, the surface 352 on the −z direction side of the hard member 35 is a surface that partitions the z direction side of the through hole 33. Therefore, as shown in FIGS. 4A and 4B and FIGS. 5A and 5B, the inclined surface 16a is in contact with the surface 352 of the hard member 35.

  In the locked state shown in FIGS. 4A and 5A, the hard member 35 is sandwiched between the inclined surface 16a and the contact surface 5a. The hard member 35 is less likely to be deformed than the resin, and is less likely to bend. Therefore, even if vibration of the vehicle occurs, the movable member 29 including the hard member 35 will not be pushed deeper between the inclined surface 16a and the abutted surface 5a. Since the movable member 29 is not pinched by a strong force, a state where the occupant can smoothly perform the operation for switching from the locked state to the unlocked state with a relatively light force is maintained.

  In addition, since the movable member 29 hardly deforms or bends due to the vibration of the vehicle, a gap does not occur between the movable member 29 and the contact surface 5a. For this reason, generation of abnormal noise due to rattling of the upper rail 2 is also reliably prevented in the present embodiment.

  In the present embodiment, a portion of the movable member 29 that is sandwiched between the inclined surface 16a and the contact surface 5a is formed of metal instead of resin. Instead of such a mode, the entire part of the movable member 29 sandwiched between the inclined surface 16a and the contact surface 5a may be formed of metal instead of resin.

  In the present embodiment, a plurality of movable members 29 are provided along the moving direction of the upper rail 2 (the direction along the x-axis). For this reason, there is no possibility of receiving a force in the direction in which the upper rail 2 rotates with the single movable member 29 as a fulcrum. As a result, rattling of the upper rail 2 with respect to the lower rail 1 is further prevented.

  The effect of the provision of the sliding member 15 will be described with reference to FIG. FIG. 7A schematically shows a state in which the occupant M moves the seat ST back and forth while unlocking the seat slide device 100 while sitting on the seat ST. Further, in FIG. 7B, the occupant M unlocks the seat slide device 100 in a state where the occupant M is not seated on the seat ST (a state in which the occupant M stands near the seat ST) and moves the seat ST back and forth. This is shown schematically.

  In the state of FIG. 7A, the vertical load applied to the seat ST is relatively large due to the addition of the weight of the occupant M. The load is a force for pressing the lower surface 15S of the sliding member 15 against the sliding surface 3S. Therefore, the frictional force applied between the sliding member 15 and the sliding surface 3S, that is, the sliding resistance received by the sliding member 15 when the upper rail 2 is moved back and forth is relatively large.

  In general, the floor to which the seat slide device 100 is attached is often inclined downward toward the front. For this reason, if the sliding resistance when moving the seat ST is too small, the seat ST in a state where the occupant M is seated may slide forward due to its own weight, causing the occupant M to feel uneasy. is there.

  However, in the seat slide device 100 according to the present embodiment, the sliding resistance when the occupant M is seated on the seat ST as shown in FIG. 7A is increased as described above. For this reason, even if it is in an unlocked state, it is possible to prevent the sheet ST from sliding under its own weight along the downward slope. Since the increase in the sliding resistance is such that the seat ST is prevented from sliding by its own weight, the work load for the occupant M to slide the seat ST does not become too large.

  In FIG. 7A, the force required to slide the sheet ST in the x direction is indicated by an arrow AR11. The force required to slide the sheet ST in the -x direction is indicated by an arrow AR12. The thickness of each arrow indicates the magnitude of the force. In the present embodiment, the magnitudes of the forces indicated by these arrows are the same. The “force required to slide the sheet ST” indicated by an arrow AR11 or the like is substantially equal to the sliding resistance received by the sliding member 15.

  In the state of FIG. 7B, the weight of the occupant M is not added to the seat ST. For this reason, the load on the sheet ST in the vertical direction is relatively small. Accordingly, the frictional force applied between the sliding member 15 and the sliding surface 3S, that is, the sliding resistance received by the sliding member 15 when the upper rail 2 is moved back and forth is relatively small. .

  As shown in FIG. 7B, when the occupant M is not seated on the seat ST, even if the seat ST in the unlocked state slides forward due to its own weight, the occupant M may feel uneasy. There is no. For this reason, as in the present embodiment, it is preferable to reduce the sliding resistance received by the sliding member 15 in the unlocked state and reduce the work load for the occupant M to slide the seat ST.

  In FIG. 7B, the force required to slide the sheet ST in the x direction is indicated by an arrow AR21. The force required to slide the sheet ST in the −x direction is indicated by an arrow AR22. The thickness of each arrow indicates the magnitude of the force. In the present embodiment, the magnitudes of the forces indicated by these arrows are the same. However, the force is smaller than the force indicated by the arrow AR11 in FIG.

  When the occupant M is, for example, a child, its weight is smaller than that of an adult. Therefore, the load applied to the sheet ST in the vertical direction is smaller than in the case of FIG. 7A and larger than in the case of FIG. 7B. Accordingly, the sliding resistance received by the sliding member 15 in the unlocked state is smaller than in the case of FIG. 7A and is larger than that in the case of FIG. 7B. Thereby, while ensuring the sliding resistance so that the seated occupant M does not feel uneasy, the work load for the occupant M to slide the seat ST is suppressed to such a level that even a weak child can easily operate. be able to.

  As described above, the seat slide device 100 according to the present embodiment is configured such that the sliding resistance received by the sliding member 15 when the upper rail 2 is moved changes according to the vertical load received by the seat ST. I have. For this reason, it is possible to appropriately change the sliding resistance when sliding the sheet ST according to the situation without requiring a complicated mechanism.

  In the present embodiment, three sliding members 15 are provided, but the number of sliding members 15 may be two or less, or four or more.

  In the present embodiment, a portion (the lower surface 15S) of the sliding member 15 that comes into contact with the sliding surface 3S is a flat surface. For this reason, the force applied from the sliding member 15 to the sliding surface 3S does not concentrate on a narrow range, and it is possible to prevent the sliding surface 3S from being damaged such as an indentation. As a result, the entire surface 3S to be slid is maintained in a flat state, and the state in which the upper rail 2 can smoothly move back and forth is maintained. Further, generation of abnormal noise when the upper rail 2 is moved is also prevented.

  A second embodiment of the present invention will be described. As shown in FIG. 8, the seat slide device 100A according to the second embodiment has a configuration in which the sliding members 152 and 153 in the first embodiment (FIG. 1) are each replaced with a roller 15R. ing. As a result, in the present embodiment, the two rollers 15 </ b> R are provided at positions on the rear side (−x direction side) of the sliding member 15 in the upper rail 2. The seat slide device 100A differs from the seat slide device 100 only in this point, and is the same as the seat slide device 100 in other points. Hereinafter, points different from the first embodiment will be mainly described, and description of points common to the first embodiment will be appropriately omitted.

  The roller 15 </ b> R is a wheel supported rotatably with respect to the arm plate 14. The roller 15R is placed on the upper surface of the bottom plate 3 (that is, the sliding surface 3S), and supports the upper rail 2 so as to be movable in a direction along the x-axis. That is, the upper rail 2 is supported on the sliding surface 3S. When the sheet ST is slid, the sliding resistance at the roller 15R is substantially zero.

  FIG. 9A schematically illustrates a state in which the occupant M moves the seat ST back and forth while unlocking the seat slide device 100A while sitting on the seat ST. Further, in FIG. 9B, the occupant M unlocks the seat slide device 100A in a state where the occupant M is not seated on the seat ST (a state where the occupant M stands near the seat ST) and moves the seat ST back and forth. This is shown schematically.

  In the state shown in FIG. 9A, the load applied to the sheet ST in the vertical direction is relatively large. The load is a force for pressing the lower surface 15S of the sliding member 15 against the sliding surface 3S. Therefore, the frictional force applied between the sliding member 15 and the sliding surface 3S, that is, the sliding resistance received by the sliding member 15 when the upper rail 2 is moved back and forth is relatively large. This is the same as the first embodiment shown in FIG.

  When the seat ST is moved to the front side, a force is applied to the seat ST in a direction to lean forward. For this reason, the force with which the sliding member 15 is pressed against the sliding surface 3S is larger than the force with which the roller 15R is pressed against the sliding surface 3S. However, the magnitude of the force is substantially the same as in the first embodiment. For this reason, the sliding resistance (arrow AR11) received by the sliding member 15 is approximately the same as that in the case of FIG.

  On the other hand, when the seat ST is moved rearward, a force is applied to the seat ST in a direction inclining rearward. For this reason, the force with which the sliding member 15 is pressed against the sliding surface 3S is smaller than the force with which the roller 15R is pressed against the sliding surface 3S. Although the roller 15R is strongly pressed against the sliding surface 3S, the sliding resistance does not increase accordingly. As a result, the magnitude of the sliding resistance received by the sliding member 15 (arrow AR12) becomes smaller than in the case of FIG.

  As described above, in the present embodiment, the sliding resistance when the sheet ST is moved in the x direction is greater than the sliding resistance when the sheet ST is moved in the −x direction. As described above, the floor on which the seat slide device 100 is mounted is often inclined downward toward the front. For this reason, according to the seat slide device 100A according to the present embodiment, the work load of the occupant M when moving the seat ST forward and the work load of the occupant M when moving the seat ST forward are reduced. , Can be approximately equal.

  In the state shown in FIG. 9B, the load applied to the sheet ST in the vertical direction is relatively small. Therefore, the frictional force applied between the sliding member 15 and the sliding surface 3S, that is, the sliding resistance received by the sliding member 15 when the upper rail 2 is moved back and forth is relatively small. This is the same as the first embodiment shown in FIG. 7B.

  9B, similarly to the above, the sliding resistance when moving the sheet ST in the x direction (arrow AR21) is the sliding resistance when moving the sheet ST in the −x direction (arrow AR21). It becomes larger than the arrow AR22). That is, the force indicated by the arrow AR21 in FIG. 9B is substantially the same as that in FIG. 7A, and the force indicated by the arrow AR22 in FIG. Smaller than the case.

  For this reason, when the occupant M is not seated, the work load of the occupant M when moving the seat ST forward is reduced while the sliding resistance is reduced as compared with when the occupant M is seated in FIG. The work load of the occupant M when moving the seat ST forward can be made substantially equal.

  In this embodiment, two rollers 15R are provided, but the number of rollers 15R may be one, or three or more. In any case, the roller 15 </ b> R may be provided at a position on the rear side (−x direction side) of the sliding member 15.

  When the floor to which the seat slide device 100 is attached is inclined downward toward the rear, contrary to the above, the roller 15R and the sliding member 15 shown in FIG. It may be. That is, the roller 15R may be provided at a position on the front side (x direction side) of the sliding member 15 in the upper rail 2. Even in such an embodiment, the work load of the occupant M when moving the seat ST forward and the work load of the occupant M when moving the seat ST forward can be made substantially equal. .

  A third embodiment of the present invention will be described with reference to FIGS. The seat slide device 100B according to the third embodiment differs from the first embodiment in a partial shape of the lever 22 and the like. Hereinafter, points different from the first embodiment will be mainly described, and description of points common to the first embodiment will be appropriately omitted.

  In FIGS. 10 to 12, the shape of the movable member 29 is schematically illustrated. Specifically, of the movable member 29, only a portion (a part of the arm portion 31) interposed between the upper plate portion 5 and the guide portion 16 is shaped like a wedge connected to the tip of the slider 26. It is drawn in. The actual specific shape of the portion is the same as the shape of the first embodiment shown in FIG.

  FIG. 10 shows the internal configuration of the seat slide device 100B in the locked state. In the present embodiment, the shape of the lever 22 provided on the x direction side and the shape of the lever 22A provided on the −x direction side are not symmetric as shown in FIG. ing. The transmission portion 24a is not formed on the lever 22A provided on the −x direction side, that is, on the rear side of the vehicle, and a connection portion 27 is formed instead. The connection portion 27 is formed so as to protrude upward from a portion of the lever 22A on the rear side of the upper arm portion 24. A wire WR is connected near the upper end of the connection portion 27.

  In the present embodiment, when the backrest portion of the seat ST is tilted forward as shown in FIG. 7B, the wire WR is pulled in the −x direction. In FIG. 10, the backrest portion of the seat ST is not tilted down, and the occupant M can be seated as shown in FIG.

  In the locked state shown in FIG. 10, the transmission portion 24a of the lever 22 is not lifted by the lock member 18. Therefore, the upper arms 24 of the lever 22 and the lever 22A are brought closer to each other by the force of the coil spring 28. Each movable member 29 receives a force in a direction away from the lock member 18. At this time, the front and rear movable members 29 are sandwiched between the inclined surface 16a and the contact surface 5a like a wedge, and are brought into contact with and pressed against the contact surface 5a. I have. Thereby, rattling (relative displacement along the z-axis) between the lower rail 1 and the upper rail 2 is suppressed.

  FIG. 11 shows the internal state of the seat slide device 100B in the unlocked state. In this state, the lever 22 rotates counterclockwise around the rotation shaft 23 by lifting the transmission portion 24a of the lever 22 by the lock member 18. As a result, the movable member 29 in the x direction moves to the −x direction side, and the movable member 29 is extracted from between the inclined surface 16a and the contact surface 5a. Thereafter, no frictional force is generated between the movable member 29 on the x direction side and the contact surface 5a.

  On the other hand, since the transmission portion 24a is not formed on the lever 22A, the lever 22A is not lifted by the lock member 18 even in the unlocked state shown in FIG. As the lever 22 rotates counterclockwise, the force in the x direction that the lever 22A receives from the coil spring 28 increases. Due to the force, the lever 22A rotates counterclockwise around the rotation shaft 23. As a result, the movable member 29 on the −x direction side moves to the −x direction side, and the movable member 29 is further pushed between the inclined surface 16a and the contact surface 5a. .

  In such a state, when the sheet ST moves to the x direction side (forward side), the frictional force from the contact surface 5a is applied to the −x direction side to the −x direction side movable member 29. Can be Accordingly, the movable member 29 on the −x direction side tends to relatively move in the −x direction side along the inclined surface 16a, so that the movable member 29 is further pushed between the inclined surface 16a and the contact surface 5a. . As a result, the frictional force between the movable member 29 and the contact surface increases, and the sliding resistance of the sheet ST during movement increases. The sliding resistance in this case is substantially equal to the sum of the frictional force between the movable member 29 and the contacted surface 5a plus the frictional force between the sliding member 15 and the sliding surface 3S.

  On the other hand, when the sheet ST moves in the −x direction side (rearward side), the frictional force from the contact surface 5a is applied to the −x direction side movable member 29 in the x direction side. As a result, the movable member 29 on the −x direction side tends to move relatively in the x direction along the inclined surface 16a, so that the movable member 29 is extracted from between the inclined surface 16a and the contact surface 5a. As a result, the frictional force between the movable member 29 and the contact surface becomes substantially zero, and the sliding resistance of the sheet ST during movement decreases. The sliding resistance in this case is substantially equal to the frictional force between the sliding member 15 and the sliding surface 3S.

  As described above, in the present embodiment, the sliding resistance when the sheet ST is moved in the x direction is greater than the sliding resistance when the sheet ST is moved in the −x direction. Therefore, according to the seat slide device 100B according to the present embodiment, the work load of the occupant M when moving the seat ST in the x direction and the work of the occupant M when moving the seat ST in the −x direction. The load can be substantially equalized.

  Further, similarly to the first embodiment, the present embodiment is configured such that the sliding resistance received by the sliding member 15 when the upper rail 2 is moved is changed by the vertical load applied to the sheet ST. For this reason, it is possible to appropriately change the sliding resistance when sliding the sheet ST according to the situation without requiring a complicated mechanism.

  FIG. 12 shows a state where the backrest of the seat ST is tilted forward and the wire WR is pulled rearward. In this state, the upper end of the connection portion 27 is pulled by the wire WR, so that the lever 22A rotates clockwise around the rotation shaft 23. As a result, the movable member 29 on the −x direction side moves to the x direction side, and the movable member 29 is extracted from between the inclined surface 16a and the contact surface 5a. In the state of FIG. 12, no frictional force is generated between the movable member 29 and the contact surface 5a on either the front side or the rear side. For this reason, the sliding resistance when moving the sheet ST is substantially equal to the frictional force between the sliding member 15 and the sliding surface 3S regardless of the moving direction.

  That is, in the present embodiment, the state in which the sliding resistance when moving the seat ST is different depending on the moving direction and the state where the sliding resistance is the same regardless of the moving direction are automatically switched by the tilt angle of the backrest. It has a configuration.

  For this reason, when the occupant M is sitting, the sliding resistance to the front side is increased, and it is possible to prevent the occupant from feeling uneasy. Further, when the occupant M is not seated, the sliding resistance can be reduced regardless of the moving direction of the seat ST, and the work load of the occupant M can be reduced.

  Note that, in the present embodiment, similarly to the second embodiment in FIG. 8, a configuration may be employed in which a roller 15 </ b> R is provided on the rear side (−x direction side) of the sliding member 15.

  A fourth embodiment of the present invention will be described with reference to FIGS. Hereinafter, points different from the first embodiment will be mainly described, and description of points common to the first embodiment will be appropriately omitted.

  FIGS. 13 to 15 show a configuration of a portion other than the lower rail 1 in the seat slide device 100C according to the present embodiment. The movable member 29 in the present embodiment has a configuration in which a first connection portion 302 and a second connection portion 303 are formed between a support portion 301 and an arm portion 31. The first connection portion 302 is a portion formed so as to extend from the outer end along the y-axis of the support portion 301 in the z-direction. The second connection portion 303 is a portion formed to extend outward from the z-direction end of the first connection portion 302 along the x-axis.

  The arm portion 31 in the present embodiment does not have the through hole 33 as in the first embodiment, but has a groove 330 instead. The groove 330 is a concave groove formed so as to retreat from the end surface on the −z direction side of the arm portion 31 toward the z direction. A vertical portion 420 described below is inserted into the groove 330 from the −z direction side.

  In this embodiment, an interlocking mechanism similar to that described in the first embodiment is also provided. Therefore, when the occupant operates the handle 20 and the operating portion 18b is pushed down in the −z direction to be in a locked state, each movable member 29 moves in a direction away from the lock member 18 along the x-axis. When the operating portion 18b is lifted in the z-direction to be in the unlocked state, each movable member 29 moves in the direction approaching the lock member 18 along the x-axis.

  Of the two metal plates 11 included in the upper rail 2, those arranged on the y-direction side are also referred to as “first metal plates 111” below. Further, of the two metal plates 11, the one arranged on the −y direction side is also referred to as “second metal plate 112” below. Further, a portion of the upper rail 2 where the lock member 18 is provided, that is, a portion formed by the first metal plate 111 and the second metal plate 112 is hereinafter referred to as a “main body portion 110”. write.

  The upper rail 2 in the present embodiment includes a pair of plate members 400 in addition to the main body 110. Further, in the present embodiment, the sliding member 15 is not provided on the arm plate portion 14, and the sliding member 500 is provided on the plate member 400 instead.

  The plate member 400 is provided on a portion on the x direction side and a portion on the −x direction side of the bottom surface of the main body 110. Further, each of the plate members 400 is provided with two sliding members 500. The shape of each plate member 400 is symmetric with respect to the yz plane. Hereinafter, the configuration of the plate member 400 arranged on the x direction side and the configuration of the sliding member 500 provided thereon will be mainly described, and the description of the configuration of the other plate member 400 and the like will be omitted.

  As shown in FIG. 16, the plate member 400 is a plate-shaped member formed by pressing a metal plate. The plate member 400 has a horizontal portion 410, a pair of vertical portions 420, and insertion portions 440 and 450.

  The horizontal portion 410 is a flat plate-shaped portion parallel to the bottom surface of the main body portion 110, that is, an end surface on the −z direction side (may be parallel to the xy plane). This is the part that abuts.

  The vertical portion 420 is a flat plate-shaped portion formed to extend toward the z-direction side (upper side) from each of the y-direction end and the −y-direction end of the horizontal portion 410. . The vertical portion 420 is a portion that abuts against the arm plate portion 14 from outside. An inclined surface 421 is formed at the tip of the vertical portion 420 on the z direction side. The inclined surface 421 is an inclined surface that goes toward the z direction as it goes toward the x direction. That is, it is a surface inclined like the inclined surface 16a in the first embodiment.

  The insertion portion 440 is a flat plate-shaped portion formed to extend from the x-direction end of the horizontal portion 410 toward the z-direction (upward). The insertion portion 440 is a portion inserted between the first metal plate 111 and the second metal plate 112, specifically, between the side plate portions 13 facing each other. The dimension (width) of the insertion portion 440 along the y-axis is substantially equal to the distance between the side plate portions 13 facing each other.

  The insertion portion 450 is a flat plate-shaped portion formed to extend from the end on the −x direction side of the horizontal portion 410 toward the z direction side (upward side). The insertion portion 450 is a portion inserted between the first metal plate 111 and the second metal plate 112, specifically, between the side plate portions 13 facing each other, similarly to the above-described insertion portion 440. I have. The dimension (width) of the insertion portion 450 along the y-axis is substantially equal to the distance between the side plate portions 13 facing each other.

  A protruding portion 411 that protrudes in the y direction is formed at a boundary portion between the horizontal portion 410 and the vertical portion 420 on the y direction side. In the horizontal portion 410, a pair of cutouts 412 extending in the −y direction side are formed at positions on both sides of the protruding portion 411 along the x-axis. Further, a concave portion 413 is formed so as to retreat toward the center side along the x-axis from a position which is an end on the −y direction side of each of the notches 412.

  Note that the shape of the plate member 400 is symmetric with respect to the xz plane. For this reason, the same protruding portion 411, notch 412, and concave portion 413 as described above are also formed at the boundary portion between the horizontal portion 410 and the vertical portion 420 on the −y direction side.

  The shape of the sliding member 500 will be described. In the present embodiment, the shapes of the respective sliding members 500 are the same as each other. Therefore, hereinafter, the shape of the sliding member 500 disposed on the y direction side will be mainly described, and the description of the shape of the sliding member 500 disposed on the −y direction side will be omitted. Note that FIG. 16 shows a state in which the sliding member 500 disposed on the y direction side is detached from the plate member 400 along the y axis.

  The sliding member 500 is a member entirely formed of resin, like the sliding member 15 in the first embodiment. The sliding member 500 has a horizontal portion 510 and a vertical portion 520. The horizontal portion 510 is a plate-shaped portion parallel to the horizontal portion 410 of the plate member 400. The surface of the horizontal portion 510 on the z direction side is a surface that contacts the surface of the horizontal portion 410 on the −z direction side. Further, the surface 514 on the −z direction side of the horizontal portion 510 contacts the upper surface (slidable surface 3S) of the bottom plate portion 3 of the lower rail 1 similarly to the lower surface 15S of the sliding member 15 in the first embodiment. It is a flat surface in contact.

  The vertical portion 520 is a plate-shaped portion parallel to the vertical portion 420 of the plate member 400. The vertical portion 520 is formed so as to extend from the end of the horizontal portion 510 on the y direction side toward the z direction. The surface of the vertical portion 520 on the −y direction side is a surface that contacts the surface of the vertical portion 420 on the y direction side.

  A pair of protrusions 511 are formed on the surface of the horizontal portion 510 on the z direction side. Each projection 511 is formed so as to protrude in the z-direction, and is formed so as to extend along the y-axis. Further, a projection 512 is formed at the tip of the projection 511 on the −y direction side so as to project toward the center along the x-axis. A through hole 513 is formed in the vertical portion 520 at a portion between the pair of protrusions 511 so as to penetrate the vertical portion 520 along the y-axis.

  The sliding member 500 may be entirely formed of a resin as in the present embodiment, but only a portion that contacts the sliding surface 3S is formed of a resin, and the other portions are formed of another resin. It may be formed of a material.

  The sliding member 500 arranged on the y-direction side can be fitted and fixed to the plate member 400 by moving from the position shown in FIG. 16 to the −y-direction side. At this time, the protrusion 411 of the plate member 400 is inserted into the through hole 513 of the sliding member 500. Further, a pair of projections 511 formed on the sliding member 500 are fitted into a pair of notches 412 formed on the plate member 400. At this time, the projection 512 formed on the projection 511 is in a state of being caught by the recess 413 formed on the notch 412, so that the sliding member 500 once fitted is prevented from coming off the plate member 400. Is done. The sliding member 500 arranged on the −y direction side is also fitted and fixed to the plate member 400 by the same configuration as described above.

  The plate member 400 in which the pair of sliding members 500 are fitted and fixed is welded and fixed to the bottom surface of the main body 110. In FIG. 14, a portion where the plate member 400 is welded to the main body 110 is indicated by a dotted line DL.

  As shown in the figure, at the lower end of the main body 110, the first metal plate 111 and the second metal plate 112 are separated from each other, and the plate member 400 is welded so as to connect these separated portions. Fixed. That is, the horizontal portion 410 of the plate member 400 is welded and fixed to both the first metal plate 111 and the second metal plate 112.

  In the seat slide device 100C according to the present embodiment, a total of four sliding members 500 are fixed by being fitted into the plate member 400. When the sheet moves in the front-back direction, each sliding member 500 moves along the x-axis while sliding on the sliding surface 3S. At this time, since a frictional force is generated between the surface 514 and the sliding surface 3S, the upper rail 2 moves while receiving a sliding resistance caused by the frictional force. The effect of providing such a sliding member 500 is the same as the effect already described with reference to FIG.

  In the present embodiment, the attachment of the sliding member 500 to the upper rail 2 can be performed more easily than in the first embodiment in which the attachment of the sliding member 15 is performed via the shaft SH. For this reason, the manufacturing cost of the seat slide device 100C can be suppressed.

  As shown in FIG. 15, in each of the arm portions 31, both the vertical portion 420 and the side plate portion 13 are inserted into the groove 330 from the −z direction side. In the present embodiment, the end surface of the vertical portion 420 on the z direction side, that is, the entire inclined surface 421 is disposed at a position further on the z direction side than the end surface of the side plate portion 13 on the z direction side. For this reason, the inner wall surface (that is, the top surface) of the groove 330 on the z direction side is in a state of contacting the inclined surface 421. Note that the inner wall surface of the groove 330 on the z direction side is substantially parallel to the inclined surface 421 facing this.

  When the occupant operates the handle 20 to switch from the unlocked state to the locked state, the movable member 29 moves in a direction away from the lock member 18 as described in the first embodiment. At this time, the arm 31 of the movable member 29 moves along the inclined surface 421 and is sandwiched between the inclined surface 421 and the contact surface 5a like a wedge. Thereby, rattling between the lower rail 1 and the upper rail 2 is suppressed. Thus, the inclined surface 421 of the plate member 400 in the present embodiment functions as a substitute for the inclined surface 16a in the first embodiment.

  The inclined surface 421 is formed on a part of the relatively small plate member 400. For this reason, the inclined surface 421 can be formed easily and accurately compared to a configuration in which the inclined surface 16a is formed in a part of a relatively large member as in the first embodiment.

  In order to realize the function of suppressing rattling, it is preferable that the distance from the surface 514 of the sliding member 500 to the inclined surface 421 is uniform for each sliding member 500. In the present embodiment, the distance is determined only by the plate member 400, which is a relatively small member, and the sliding member 500. For this reason, it is relatively easy to increase the accuracy of the distances and make the distances equal.

  On the other hand, in the first embodiment, the lower surface of the sliding member 15 is formed by the metal plate 11, which is a relatively large member having a complicated shape, the shaft SH provided on the metal plate 11, and the sliding member 15. The distance from 15S to the inclined surface 16a is determined. Therefore, it is difficult to equalize the distance as a whole as compared with the present embodiment. As described above, this embodiment is more preferable than the first embodiment in realizing the function of suppressing rattling.

  Each of the sliding members 500 in the present embodiment is provided at a position overlapping the movable member 29 in the vertical direction. As a result, the force in the z direction that the upper rail 2 receives from the sliding member 500 and the force in the −z direction that the upper rail 2 receives from the movable member 29 are applied to the upper rail 2 at substantially the same position along the x axis. It will be. Therefore, compared to a configuration in which each force is applied to the upper rail 2 at a different position along the x-axis, distortion generated in the upper rail 2 is smaller. As described above, in the present embodiment, the rigidity of the upper rail 2 is increased by devising the positional relationship between the sliding member 500 and the movable member 29.

  By the way, when the vehicle collides, a force for lifting the upper rail 2 in the z direction is applied to the upper rail 2 by the impact of the collision. The force tends to be applied particularly strongly at a position at the end along the x-axis of the upper rail 2, that is, in the vicinity of the portion where each plate member 400 is provided.

  When such a force is applied, the main body 110 of the upper rail 2 tends to deform so that the respective arm plate portions 14 open outward, and also attempts to deform such that the respective side plate portions 13 approach each other. That is, an attempt is made to deform in a direction in which the width W shown in FIG. 15 decreases.

  However, in the present embodiment, as described above, the horizontal portion 410 of the plate member 400 is welded and fixed to both the first metal plate 111 and the second metal plate 112 that are separated from each other. For this reason, the deformation in which the width W in FIG. 15 is reduced is suppressed by the horizontal portion 410. Furthermore, in the present embodiment, a part of the plate member 400 (insertion portions 440 and 450) is inserted between the first metal plate 111 and the second metal plate 112. For this reason, the deformation | transformation which the width | variety W of FIG. 15 becomes small hardly arises.

  Further, the outside of each arm plate portion 14 is sandwiched between a pair of vertical portions 420. For this reason, in the present embodiment, the deformation in which each arm plate portion 14 opens outward is less likely to occur.

  As described above, in the present embodiment, the deformation of the upper rail 2 when the vehicle collides can be suppressed by the plate member 400.

  The embodiment of the invention has been described with reference to examples. However, the present invention is not limited to these specific examples. That is, those in which those skilled in the art have appropriately modified the design of these specific examples are also included in the scope of the present invention as long as they have the features of the present invention. For example, the components included in each of the above-described specific examples and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, but can be appropriately changed. In addition, each element included in each of the embodiments described above can be combined as far as technically possible, and a combination of these elements is also included in the scope of the present invention as long as it includes the features of the present invention.

100, 100A, 100B, 100C: Seat slide device 1: Lower rail 2: Upper rail 15: Sliding member 3: Bottom plate 3S: Sliding surface M: Occupant ST: Seat

Claims (11)

A seat slide device provided in a vehicle,
A lower rail fixed to the floor of the vehicle,
An upper rail fixed to the vehicle seat and supported in a movable manner with respect to the lower rail,
The upper rail is provided with a sliding member that comes into contact with the sliding surface of the lower rail only from above,
The sliding resistance sliding member is subjected is, a shall be configured to change by the load in the vertical direction in which the sheet is subjected in the time of moving the upper rail,
A lock member that performs an operation of switching between a locked state in which the movement of the upper rail is restricted and an unlocked state in which the movement of the upper rail is permitted,
A member held by the upper rail, in the locked state, in a state in which it comes into contact with a contacted surface that is a part of the lower rail, and in the unlocked state, in a state separated from the contacted surface. A movable member,
Interlocking mechanism that interlocks with the movement of the lock member and moves the movable member along the moving direction of the upper rail,
When the interlocking mechanism moves the movable member, the movable member is guided along an inclined surface formed on the upper rail, so that a distance between the movable member and the contact surface changes. Is configured as follows. 2. The roller according to claim 1, wherein a roller that supports the upper rail with respect to the sliding surface is provided at a position on the front rail or the rear side of the sliding member in the upper rail. 3. Sheet slide device. The upper rail has a configuration in which a plate-shaped plate member is fixed to a main body portion where the lock member is provided,
The plate member,
A horizontal portion parallel to the bottom surface, the portion being in contact with the bottom surface of the main body portion,
A vertical portion extending upward from the horizontal portion,
The inclined surface is formed at the tip of the vertical portion, the seat slide apparatus according to claim 1 or 2. The seat slide device according to claim 3 , wherein the sliding member is fixed to the plate member. The seat sliding device according to claim 4 , wherein the sliding member is provided at a position overlapping the movable member in a vertical direction. At the lower end of the main body, the first metal plate and the second metal plate are separated from each other,
The seat slide device according to claim 3 , wherein the horizontal portion is welded and fixed to both the first metal plate and the second metal plate. The seat slide device according to claim 6 , wherein a part of the plate member is inserted between the first metal plate and the second metal plate. A seat slide device provided in a vehicle,
A lower rail fixed to the floor of the vehicle,
An upper rail fixed to the vehicle seat and supported in a movable manner with respect to the lower rail,
The upper rail is provided with a sliding member that comes into contact with the sliding surface of the lower rail from above,
When moving the upper rail, the sliding resistance received by the sliding member is configured to be changed by a vertical load received by the seat ,
A seat sliding device, wherein a roller that supports the upper rail with respect to the sliding surface is provided at a position on the upper rail that is either forward or rearward of the sliding member . The seat slide device according to any one of claims 1 to 8 , wherein a plurality of the slide members are provided along a moving direction of the upper rail. The seat slide device according to any one of claims 1 to 9 , wherein a portion of the sliding member that contacts the sliding surface is a flat surface.   11. The seat slide device according to claim 1, wherein at least a portion of the sliding member that contacts the sliding surface is formed of resin. 12.

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