JP2015205652A - Seat rail device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat rail device enabled to prevent the backlash of an upper rail by pushing a lower rail.SOLUTION: A seat rail device for making a vehicular seat slidable, comprises: upper rails 30 having moving rollers 34 disposed on the two lower sides, and backlash preventing rollers 35 for preventing at least vertical backlashes; and lower rails made longer than the upper rails 30 and having a bottom face, on which the moving rollers 34 roll, and a contact face consisting of a horizontal upper face or an oblique upper face for abutting against the backlash preventing rollers 35, wherein said backlash preventing rollers 35 are biased onto said contact face.

Description

  The present invention relates to a seat rail device, and more particularly to a seat rail device that can prevent rattling of an upper rail.

  Conventionally, as a seat rail device having a function of preventing rattling of the upper rail, it is held between the lower rail extending in the front-rear direction and the bottom wall and the top wall formed on the lower rail so as to be able to roll. A vehicle seat slide device comprising: an upper rail connected to the lower rail via a plurality of rollers so as to be relatively movable; and a seat body fixed to the upper rail moving in the vehicle longitudinal direction along the lower rail The rollers are disposed at three or more locations including the front and rear end portions of the upper rail, and two of the rollers are connected to each other via a fixed shaft prohibited from moving on the upper rail. In a sliding device in which the other roller is supported by a movable shaft that is allowed to move in the vertical direction on the upper rail, A technique for preventing rattling of the upper rail 25 is disclosed by offsetting a roller located in the middle of the upper rail among the rollers arranged at a position below the rollers located at the front and rear ends by a gap. (Patent Document 1).

  However, with the configuration of the above technique, it is very difficult to reliably offset by the gap. If the offset is too much, a gap is generated and it causes rattling. There was a problem that the slide load became too high and the movement became very heavy. In addition, there is a problem that when the cross sections of the lower rail and the upper rail have variations, the variations cannot be dealt with. Furthermore, if a large unscheduled force is applied in an unscheduled direction with respect to the upper rail, for example, if a force is applied in a horizontal direction perpendicular to the longitudinal direction, the roller will be damaged if there is no gap. There was also a problem that there was a possibility.

JP 2011-201471 A

  The present invention has been made in view of these problems, and an object of the present invention is to prevent rattling by pressing the upper rail against the lower rail with a constant pressure, and between the lower rail and the upper rail. It is an object of the present invention to provide a seat rail device that can make the sliding load of the upper rail constant even if there is a variation in the above.

  In order to achieve the above-mentioned object, the present invention employs the following means.

A seat rail device according to the present invention is a seat rail device for slidably providing a vehicle seat,
An upper rail having a movement roller provided on both lower sides, and a rattling prevention roller that prevents at least vertical rattling;
A lower rail that is formed longer than the upper rail and has a bottom surface on which the moving roller rolls, and a contact surface formed by a horizontal or inclined surface that contacts the backlash prevention roller;
With
The backlash prevention roller is urged against the contact surface.

  By adopting such a configuration, the backlash prevention roller presses the contact surface formed by the upper surface formed on the horizontal or inclined surface of the lower rail, thereby pressing the upper rail at least in the downward direction. Thereby, it is reduced that the upper rail rattles up and down. Also, the rattling prevention roller is urged by the contact surface but can move in a direction toward or away from the contact surface, so even if there are variations in the cross section of the lower rail and the upper rail. The contact surface can be pressed with a constant force. For this reason, when the upper rail moves relative to the lower rail, it is possible to reduce the weight and weight of the upper rail, and a constant slide load can be obtained at all times. In addition, even if an unexpected large force is applied to the upper rail in an unscheduled direction, the backlash prevention roller can move up and down to damp, so the moving roller or backlash prevention roller Can be prevented from being damaged.

  In the seat rail device according to the present invention, the rattling prevention roller may be characterized in that a roller rotation shaft is horizontally disposed on the upper rail and pressed upward. By adopting such a configuration, the force of the rattling prevention roller can be concentrated in the upward direction, so that it is possible to effectively reduce the upper rail from rattling up and down.

  Further, in the seat rail device according to the present invention, the backlash prevention roller is disposed on the upper rail obliquely so that the end of the roller rotation shaft is upward or downward, and the backlash prevention roller is applied. It may be characterized by being biased by the contact surface. By adopting such a configuration, the rattling prevention roller can press the upper rail in the vertical direction and the horizontal direction perpendicular to the longitudinal direction, and simultaneously reduce the shakiness in these directions. Can do. Further, by providing anti-rattle rollers on both sides of the upper rail, the horizontal force is applied in the opposite direction from both sides, so that the upper rail can be arranged at the center of the lower rail.

  Furthermore, in the seat rail device according to the present invention, the rattling prevention roller is arranged on a linear rigid member and is urged upward by the elastic force of the rigid member. There may be. By adopting such a configuration, it is possible to easily apply a biasing force to the rattling prevention roller using a rigid metal wire such as a piano wire.

  Furthermore, in the seat rail device according to the present invention, the rattling prevention roller is provided on the eccentric shaft member, and is in contact with the contact surface when the eccentric shaft member is biased. It may be. By adopting such a configuration, it is possible to prevent rattling without increasing the slide sliding load even if the cross sections of the lower rail and the upper rail vary.

  According to the seat rail device according to the present invention, it is possible to provide a seat rail device that can prevent rattling of the upper rail by pressing the lower rail.

FIG. 1 is a perspective view showing a seat rail device 100 according to the first embodiment. FIG. 2 is a cross-sectional view of the seat rail device 100 according to the first embodiment. FIG. 3 is a perspective view showing a main configuration of the upper rail of the seat rail device 100 according to the first embodiment. FIG. 4 is an exploded perspective view of the upper rail 31 according to the first embodiment. FIG. 5 is a cross-sectional view showing another embodiment of the seat rail device 100 according to the first embodiment. FIG. 6 is a perspective view showing the seat rail device 100 according to the second embodiment. FIG. 7 is a cross-sectional view of the seat rail device 100 according to the second embodiment. FIG. 8 is a perspective view showing a main configuration of the upper rail of the seat rail device 100 according to the second embodiment. FIG. 9A is a perspective view of the rattling-preventing rail 35 of the seat rail device 100 according to the second embodiment, and FIG. 9B is an exploded perspective view.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations. Moreover, the same or similar code | symbol is attached | subjected to the corresponding component in each figure. In the following description, for the sake of convenience, “front”, “rear”, “right”, and “left” indicate directions of arrows in FIG.

  The seat rail device 100 according to the present embodiment supports a vehicle seat (not shown) so as to be slidable in the front-rear direction, and is used by being fixed to a vehicle floor (not shown). As shown in FIG. 1, the seat rail device 100 according to the present embodiment mainly includes a lower rail 10 that is directly or indirectly attached to a vehicle floor, and a moving roller 34 (see FIG. 3)).

  The lower rail 10 is formed as a long rail, and a lower bottom surface portion 11 that is directly or indirectly fixed to the vehicle floor, and a pair of lower side surface portions 12 that are erected from both sides of the lower bottom surface portion 11. , 12 and a pair of lower upper surface portions 13, 13 extending substantially horizontally from the upper ends of the lower side surface portions 12, 12 toward the center. In addition, a movement roller 34 and a backlash prevention roller 35, which will be described later, are arranged in a roller arrangement region 16 surrounded by the lower upper surface portion 13 (see FIG. 2). In either one or both of the lower side surface portions 12, a plurality of lock member fitting holes 15 to be fitted with lock members 50 (see FIG. 3) described later are formed along the longitudinal direction. The inner surfaces of the lower upper surface portions 13 and 13 are formed on a horizontal upper surface and form an abutting surface 13a (see FIG. 2) with which the anti-rattle roller 35a abuts.

  As shown in FIG. 3, the upper rail 30 includes an upper rail base portion 31 and an upper rail standing portion 32 that stands vertically from the upper rail base portion 31. The upper rail base portion 31 is a portion disposed inside the lower rail 10, and the vicinity of the front end portion and the rear end portion of the upper rail 30 is partially cut off on both right and left sides. Two moving rollers 34 are provided at the front and rear. As the moving roller 34 rolls on the lower bottom surface portion 11 of the lower rail 10, the upper rail 30 moves along the longitudinal direction of the lower rail 10.

  Further, unlike the moving roller 34 on both sides of the upper rail 30, unlike the moving roller 34, a backlash preventing roller 35 for mainly preventing the upper rail 30 from rattling in the vertical direction is provided. doing. As shown in FIG. 4, the rattling prevention roller 35 is placed on a linear rigid member 36, and when the upper rail 30 is disposed in the lower rail 10, the rattling prevention roller 35. The rigid member 36 is arranged in a state of being slightly bent by being pressed by the 35 roller rotation shaft 35b. Therefore, the backlash prevention roller 35 is always urged upward by the elastic force of the bent rigid member 36 to return to a straight line. Specifically, for example, both side end portions 36a of a linear rigid member 36 obtained by bending a piano wire into a substantially U shape are fixed to the upper rail base 31, and a substantially U-shaped bottom surface of the rigid member 36 is provided. The roller rotation shaft 35b of the rattling prevention roller 35 is placed on the center portion 36b corresponding to the center portion 36b, and the center portion 36b of the rigid member 36 functions as an elastic member so that the rattling prevention roller 35 is attached upward. It is fast. In addition, when the roller 35 for rattling prevention is arrange | positioned in the roller arrangement | positioning area | region 16 of the lower rail 10, it presses the contact surface 13a formed in the horizontal surface of the lower upper surface parts 13 and 13, and the upper rail 30 is made into a lower rail. 10 is pressed against the bottom surface side of the upper rail 30 to reduce the upper rail 30 from rattling in the vertical direction. In the first embodiment, the rattling-preventing roller 34 is provided on the front side as a whole, and the backlash on the front side is particularly reduced. Alternatively, it may be provided on the rear side or near the center. Further, only one rattling prevention roller 35 is provided, but a plurality of rattling prevention rollers 35 may be provided. Further, the rattling-preventing roller 35 is disposed inside the pair of moving rollers 34 disposed at the front and rear, but may be disposed outside the moving roller 34.

  Further, the upper rail base 31 is provided with a right / left rattling prevention roller 38 for preventing the upper rail 30 from rattling in the left or right direction. The left and right wobble prevention rollers 38 are attached to the upper rail base 31 with a linear rigid member 38b having a roller 38a that rotates in the horizontal direction at the end, and the roller 38a is biased in a direction away from the upper rail 30. Has been. Therefore, when the right and left rattling preventing roller 38 is arranged in the roller arrangement region 16, it is possible to reduce the upper rail 30 from rattling in the left and right directions within the lower rail by pressing the lower side surface portion 12. The number of the left and right rattling preventing rollers 38 is not particularly limited, and may be one or a plurality.

  As shown in FIG. 3, the upper rail standing portion 32 includes a vehicle seat attachment portion 39 for attaching a vehicle seat and a lock member 50 that locks the upper rail 30 from sliding back and forth. The vehicle seat attachment portion 39 is not particularly limited, and can be appropriately changed according to the vehicle seat to be attached.

  As shown in FIG. 3, the lock member 50 includes a lock piece member 51 having a plurality of lock pieces 51a and a movable portion 51b for moving the lock pieces 51a, and a helical spring that biases them in the lock direction. And an urging spring 52 made of

  The lock piece member 51 is rotatably provided so that the plurality of lock pieces 51a can be moved into a fitted state and a non-fitted state in the lock member fitting hole 15, and an external force is applied by the biasing spring 52. In a state where no is applied, the lock piece 51a is biased so as to be fitted into the lock member fitting hole 15. Therefore, when the force is not applied, the upper rail 30 is in a locked state that is prevented from moving in the front-rear direction. The movable portion 51b is a member for releasing the lock piece 51 in the locked state from the lock member fitting hole 15, and the locked state can be released by pressing the movable portion 51b downward.

  In the seat rail device 100 configured as described above, the upper rail 30 is always pressed downward with respect to the lower rail 10 because the backlash prevention roller 35 always presses the contact surface 13a. As a result, it is possible to prevent rattling in the vertical direction. In addition, since the member being pressed is the roller 35a, it is possible to move back and forth even in the pressed state, and play at the time of movement can be reduced. At this time, even if there is a variation between the upper rail 30 and the lower rail 10, the variation degree can be buffered by the rigid member 36, so that the influence on the sliding load at the time of sliding can be minimized. In addition, since the backlash in the horizontal direction is prevented by the left and right backlash prevention roller 38, backlash in the top, bottom, left and right is prevented.

  In the first embodiment, the linear rigid member 36 is used as means for urging the rattling-preventing roller 35 upward. However, the present invention is not limited to this. For example, as shown in FIG. The rattling prevention roller 35 may be biased upward using a helical spring 36c or an elastic member.

(Second Embodiment)
A seat rail device 100 according to a second embodiment is shown in FIG. The seat rail device 100 according to the second embodiment includes a lower rail 10 and an upper rail 30 as in the first embodiment.

  The lower rail 10 is formed in the shape of a long rail as in the first embodiment. As shown in FIG. 6, the lower bottom surface portion 11 fixed to the vehicle floor and the lower bottom surface portion 11 stand up from both sides. And a pair of lower side surface portions 12 and 12 and a pair of lower upper surface portions 13 and 13 extending from the upper ends of the lower side surface portions 12 and 12 toward the center. 11, a roller arrangement region 16 surrounded by the lower side surface portion 12 and the lower upper surface portion 13 is formed. In either one of the lower side surface portions 12, a plurality of lock member fitting holes 15 to be fitted to a lock member 50 described later are formed along the longitudinal direction. In the lower rail 10 according to the second embodiment, as shown in FIG. 7, the contact surface 13 a formed on the inner surface of the lower upper surface portion 13 is formed on the upper surface formed of a slope having a high inner center and a low outer side. .

  As shown in FIG. 8, the upper rail 30 includes an upper rail base portion 31 and an upper rail standing portion 32 that stands vertically from the upper rail base portion 31. The upper rail base 31 is a portion disposed inside the lower rail 10 and is formed of a long member. Further, the vicinity of the front end portion and the rear end portion of the upper rail 30 is partially cut out on both right and left sides, and two pairs of moving rollers 34 are provided in the cut out portion in the front and rear.

Further, unlike the moving roller 34 on both sides of the upper rail 30, unlike the moving roller 34, a backlash preventing roller 35 for mainly preventing the upper rail 30 from rattling in the vertical direction is provided. doing.

  As shown in FIG. 7, the pair of rollers 35a of the anti-rattle roller 35 according to the second embodiment is arranged such that the upper width A of the both-side rollers 35a is wide and the lower width B is narrow. . As shown in FIG. 9, the rattling prevention roller 35 mainly includes a roller 35a, an eccentric shaft member 35d, and a spring member 35e. The roller 35a is a normal roller that rotates about a roller rotation shaft 35f. The eccentric shaft member 35d has a roller rotation shaft 35f serving as an axis of the roller 35a, a spring member mounting portion 35g to which the spring member 35e is attached, and a self shaft 35h for rotating the eccentric shaft member 35d itself. The roller rotation shaft 35f is formed in a cylindrical shape, and the roller 35a is provided to be freely rotatable. The spring member attachment portion 35g is fixedly attached so that the spring member 35e does not rotate, and has a function of urging the eccentric shaft member 35d to rotate in a fixed direction around the own shaft 35h of the eccentric shaft member 35d. The own shaft 35h is formed in a columnar shape, and is disposed obliquely with respect to the upper rail base 31 so that the roller rotation shaft 35f side is lower than the own shaft 35h side as shown in FIG. In other words, the rattling prevention roller 50 is disposed obliquely on the upper rail 30 so that the end of the roller rotation shaft 35f faces downward. Thereby, the roller 35a is arrange | positioned diagonally in the state which opened upwards outside. The roller rotation shaft 35f and the own shaft 35h of the eccentric shaft member 35d have an eccentric structure in which the shaft centers are shifted. By rotating about the own shaft 35h, the roller 35a is rotated as shown by the arrow in FIG. It moves so as to draw a circle around its own axis 35h. That is, the own shaft 35h is urged by the spring member 35e so that the roller 35a rotates upward, as shown by an arrow in FIG. 8, so that the roller 35a rotates clockwise. The contact surface 13a formed on the contact surface 13a is contacted and pressed.

  In the seat rail device 100 configured as described above, since the rattling prevention roller 35 always presses the contact surface 13a of the lower rail 10 upward and obliquely, the upper rail 30 is always lower than the lower rail 10. In other words, it is pressed inward and prevents rattling in the vertical and horizontal directions. In addition, since the member being pressed is the roller 35a, it is possible to move back and forth even in the pressed state, and play at the time of movement can be reduced. Furthermore, since the two anti-rare rollers 35 in the second embodiment both press the upper rail 30 in the inner direction, the upper rail 30 can be disposed at the center of the left and right. In addition,

  The present invention is not limited to the above-described embodiments, and can be implemented in various modes as long as they belong to the technical scope of the present invention.

  As shown in the above-described embodiment, the present invention can be industrially used as a seat rail device for attaching a vehicle seat.

DESCRIPTION OF SYMBOLS 10 ... Lower rail, 11 ... Lower bottom surface part, 12 ... Lower side surface part, 13 ... Lower upper surface part, 13a ... Contact surface, 15 ... Lock member fitting hole, 16 ... Roller arrangement area, 30 ... Upper rail, 31 ... Upper Rail base, 32 ... Upper rail standing part, 34 ... Moving roller, 35 ... Prevention roller, 35a ... Roller, 35b ... Roller rotation shaft, 35d ... Eccentric shaft member, 35e ... Spring member, 35f ... Roller rotation shaft, 35g ... Spring member mounting portion, 35h ... Self shaft, 36 ... Rigid member, 36a ... Both end portions, 36b ... Center portion, 38 ... Rolling prevention roller, 38a ... Roller, 38b ... Rigid member, 39 ... Vehicle seat mounting 50: Lock member 51: Lock piece member 51a: Lock piece 51b: Movable part 100: Seat rail device

Claims (5)

In a seat rail device for slidably providing a vehicle seat,
An upper rail having a movement roller provided on both lower sides, and a rattling prevention roller that prevents at least vertical rattling;
A lower rail that is formed longer than the upper rail and has a bottom surface on which the moving roller rolls, and a contact surface formed by a horizontal or inclined surface that contacts the backlash prevention roller;
With
The seat rail device according to claim 1, wherein the backlash prevention roller is urged against the contact surface.   2. The seat rail device according to claim 1, wherein the rattling prevention roller is configured such that a roller rotation shaft is horizontally disposed on the upper rail and is pressed upward.   The backlash prevention roller is disposed on the upper rail obliquely so that the end of the roller rotation shaft is upward or downward, and the backlash prevention roller is urged against the contact surface. The seat rail device according to claim 1 or 2.   3. The seat rail device according to claim 1, wherein the backlash prevention roller is disposed on a linear rigid member and is urged upward by an elastic force of the rigid member.   The backlash prevention roller is provided on an eccentric shaft member, and is in contact with the contact surface when the eccentric shaft member is biased. The seat rail device according to item.

Images