JP2010255849A - Finite motion guide device and seat rail using this finite motion guide device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finite motion guide device with a position keeping mechanism which can brake a slider relatively to a base without enlarging the size in the longitudinal direction. <P>SOLUTION: In the finite motion guide device with the base which has a rolling element rotation face, the slider which is attached movably to the base and has a loaded rotating face of the rolling element to face the rolling element rotation face and a plurality of rolling elements intervened between the rolling element rotation face and the loaded rolling element rotation face, either the base or the slider is equipped with the position keeping mechanism which the slider can be braked relatively to the base. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a finite motion guide device including a position holding mechanism capable of fixing a slider at an arbitrary position, and a seat rail using the finite motion guide device.

  Conventionally, as a motion guide device, a base on which rolling element rolling surfaces are formed, a slider that is movably assembled to the base and includes a loaded rolling element rolling surface that faces the rolling element rolling surface, and the rolling 2. Description of the Related Art There is known a motion guide device that includes a plurality of rolling elements interposed between a rolling element rolling surface and the loaded rolling element rolling surface.

  Also, as described in Patent Document 1 below, in such a motion guide device, a motion guide device including a brake device that brakes and dampens a slider with respect to a base is also known.

  Further, conventionally, as described in Patent Document 2 below, as a vehicle seat rail, a lower rail fixed to the upper surface of the vehicle floor, and a lower surface fixed to the lower surface of the vehicle seat, in the front-rear direction. 2. Description of the Related Art There is known a vehicle seat rail including an upper rail that is assembled so as to be movable, and a restriction unit that restricts movement of the upper rail in a front-rear direction in a front-rear direction when the assembly of the lower rail and the upper rail is completed.

Japanese Utility Model Publication No. 7-12461 JP 2007-118660 A

  However, since the brake device used in the conventional motion guide device has a structure in which a brake device that holds the base from both ends is attached, the length of the base and the slider in the longitudinal direction is substantially the same, so that the base is There is a problem that it cannot be used for a finite motion guide device that is hidden by a stroke. In addition, if the brake device described above is applied to a finite motion guide device, it is necessary to design the base unnecessarily long in order to always expose the base, and the compact size in the longitudinal direction, which is a feature of the finite motion guide device. There was also a problem that it was not possible to make the most of it.

  In addition, since conventional seat rails for vehicles are manufactured by sheet-metal processing a flat plate made of iron for many of the constituent members such as the lower rail and the upper rail, the constituent members could not be formed into a free shape. . Moreover, in order to ensure the strength of the component member, the component member needs to be formed in a certain size, and there has been a problem that the component member cannot be downsized and the mounting position of the vehicle seat cannot be lowered.

  The present invention has been made to solve the above problems, and even with a finite motion guide device, the slider can be braked relative to the base without increasing the size in the longitudinal direction. An object of the present invention is to provide a finite motion guide device having a simple position holding mechanism.

  It is another object of the present invention to provide a vehicle seat rail that can freely set the size of components and the mounting position of a vehicle seat using such a finite motion guide device.

  A finite motion guide device according to the present invention includes a base including a rolling element rolling surface, a slider that is movably assembled to the base and includes a loaded rolling element rolling surface facing the rolling element rolling surface, In a finite motion guide device comprising a plurality of rolling elements interposed between a rolling element rolling surface and the loaded rolling element rolling surface, at a substantially central portion in the longitudinal direction of either the base or the slider Comprises a position holding mechanism capable of braking the slider relative to the base.

  According to the present invention, even if it is a finite motion guide device, a finite motion guide device provided with a position holding mechanism capable of braking the slider relative to the base without increasing the size in the longitudinal direction is provided. can do.

It is a partial cross section figure showing an example of a finite motion guidance device concerning a 1st embodiment of the present invention. It is a perspective view for demonstrating operation | movement of the finite motion guide apparatus which concerns on the 1st Embodiment of this invention. It is a perspective view for demonstrating operation | movement of the finite motion guide apparatus which concerns on the 1st Embodiment of this invention. It is AA sectional drawing in FIG. It is a perspective view which shows an example of the finite motion guide apparatus which concerns on the 2nd Embodiment of this invention. It is BB sectional drawing in FIG. It is a figure for demonstrating operation | movement of the finite motion guide apparatus which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows an example of the finite motion guide apparatus which concerns on the example of improvement of the 2nd Embodiment of this invention. It is sectional drawing of the finite motion guide apparatus which concerns on the example of improvement of 2nd Embodiment. It is a figure which shows an example of the seat rail using the finite motion guide apparatus which concerns on this invention.

  Hereinafter, a finite motion guide device including a position holding mechanism according to the present invention and a seat rail using the finite motion guide device will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

[First Embodiment]
FIG. 1 is a partial cross-sectional view showing an example of a finite motion guide device according to the first embodiment, and FIG. 2 is a perspective view for explaining the operation of the finite motion guide device according to the first embodiment. FIG. 3 is a perspective view for explaining the operation of the finite motion guide device according to the first embodiment, and FIG. 4 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 1, the finite motion guide device 1 according to the present embodiment includes a base 10 and a slider 20 that is movably assembled to the base 10 via a plurality of rolling elements 30 a and 30 b. The slider 20 includes a position holding mechanism 40 that can brake the slider 20 relative to the base 10.

  A plurality of rolling element rolling surfaces 11 extending in the longitudinal direction are formed on the outer surface of the base 10, and the rolling element rolling surfaces 11 can smoothly roll the plurality of rolling elements 30 a and 30 b. It is formed into a circular arc shape or a Gothic arch shape so that it can be made.

  Further, the base 10 is formed so that the cross section perpendicular to the longitudinal direction has the same shape of a substantially rectangular shape regardless of the location in the longitudinal direction. The reciprocating motion along can be performed stably.

  Furthermore, as shown in FIG. 3, the base 10 is formed with a plurality of mounting holes that open in the vertical direction from the center of the surface facing the slider 20. The finite motion guide device 1 according to the present embodiment can fix the base 10 by passing fastening bolts through the plurality of mounting holes and screwing the fastening bolts into a mounting base such as a base. ing.

  The slider 20 includes a pair of divided bodies 20a and 20b arranged along the longitudinal direction of the base 10, and each of the divided bodies 20a and 20b has a recess extending in the longitudinal direction so that the base 10 can be assembled. The cross section perpendicular to the longitudinal direction is formed in a substantially U-shaped bowl shape. In addition, a load rolling element rolling surface 21 is formed on each of the divided bodies 20 a and 20 b of the slider 20 so as to face the rolling element rolling surface 11 formed on the base 10. In addition, the load rolling-element rolling surface 21 is formed in the circular arc shape, the Gothic arch shape, etc. similarly to the rolling-element rolling surface 11 mentioned above. Further, the lengths in the longitudinal direction of the base 10 and the slider 20 are formed substantially the same.

  As shown in FIG. 2, the pair of divided bodies 20 a and 20 b are connected to each other via a position holding mechanism 40 at a substantially central portion in the longitudinal direction. Thus, if the slider 20 is comprised by a pair of division body 20a, 20b and it mutually connects with the position holding mechanism 40, the position holding mechanism 40 can be installed in the approximate center part of the slider 20, and a finite motion guide apparatus The total length of 1 can be formed short. Moreover, as above-mentioned, the load rolling-element rolling surface 21 is formed in a pair of division body 20a, 20b, and each load rolling-element rolling surface 21 consists of several rolling elements 30a, 30b. The rolling element row is arranged. Furthermore, a rolling element stopper (not shown) is formed at the end of each load rolling element rolling groove 21 formed in the pair of divided bodies 20a, 20b, and rolls the pair of divided bodies 20a, 20b. The rolling element rows composed of a plurality of rolling elements 30 a and 30 b are separated from each other and are formed so as not to fall off from the loaded rolling element rolling groove 21. In the present embodiment, spherical balls are used as the rolling elements 30a and 30b.

  Thus, when the rolling element row is formed in each of the pair of divided bodies 20a and 20b and is separated from each other, when the slider 20 slides with respect to the base 10, the rolling element row becomes one of the sliders 20. Without being biased to the end, the rolling element rows can always be arranged evenly on both sides from the approximate center in the longitudinal direction, and the balance of the load received by the slider 20 can be kept good.

  In the finite motion guide device 1 according to the present embodiment, a plurality of rolling elements 30a and 30b roll in the rolling element rolling path formed by the rolling element rolling surface 11 and the loaded rolling element rolling surface 21. The slider 20 is assembled to the base 10 so as to be smoothly movable. In addition, the rolling-element rolling path is formed in the finite circulation type which has both ends. Since such a finite motion guide device 1 does not need to form a complicated circulation path, it can be reduced in size as a whole.

  The base 10, the slider 20, and the rolling elements 30a and 30b can be made of steel, aluminum alloy, stainless steel, or the like. The base 10 or the slider 20 has a substantially rectangular cross section as described above by a processing method such as forging or casting. It can be formed into a free shape such as a shape and a cross-sectional shape.

  Next, the position holding mechanism 40 of the finite motion guide device 1 according to this embodiment will be described. As shown in FIGS. 2 and 3, the position holding mechanism 40 of the finite motion guide device 1 according to the present embodiment can operate to fix and release the position of the slider 20 by operating the operation lever 43. When the operation lever 43 is operated in the release direction as shown in FIG. 2, the slider 20 can move with respect to the base 10. Further, after the slider 20 is moved to a desired position, the slider 20 can be fixed and braked relative to the base 10 by operating the operation lever 43 in a fixed direction as shown in FIG. It can be done.

  As shown in FIG. 4, the position holding mechanism 40 of the finite motion guide device 1 according to the present embodiment is configured as a gripping member 40 a that is attached to the slider 20 and can grip the base 10 from both side surfaces.

  The gripping member 40 a includes a first movable member 41 that is attached to a substantially central portion of the slider 20 so as to connect the pair of divided bodies 20 a and 20 b of the slider 20 to each other, and is close to the first movable member 41. A second movable member 42 that is relatively movable in the separating direction, a lever shaft 44 that couples the first movable member 41 and the second movable member 42, and a cap 48 at one end of the lever shaft 44. And an operation lever 43 attached by a bolt 44a. The cap 48 prevents the operation lever 43 from coming off the lever shaft 44. Further, the lever shaft 44 is formed with a step 47 as a chamfer so as to prevent the operation lever 43 from idling. Further, a resin washer 46 is interposed between the first movable member 41 and the operation lever 43 in the lever shaft 44 in order to smoothly operate the operation lever 43.

  The first movable member 41 and the second movable member 42 are respectively disposed at both ends of the base 10 in the width direction, and the lever shaft 44 is electrically connected to the first movable member 41 and the second movable member. 42 is screwed. The gripping member 40a formed in this way operates the operation lever 43 to rotate the lever shaft 44 in the direction in which the screwing between the second movable member 42 and the lever shaft 44 is tightened. The movable member 42 and the first movable member 41 can be moved in a direction in which the movable member 42 and the first movable member 41 are relatively close to each other. As a result, the movable member 42 contacts the base 10 formed on the first movable member 41 and the second movable member 42. The position of the slider 20 can be fixed at an arbitrary position with respect to the base 10 by gripping the base 10 from both side surfaces by the contact surfaces 41a and 42a. Further, as described above, the base 10 is gripped from both side surfaces by the contact surfaces 41 a and 42 a formed on the first movable member 41 and the second movable member 42 in the substantially central portion of the slider 20. Even if it is a finite motion guide device, the position holding mechanism can be configured without unnecessary enlargement.

  Further, when the lever 43 is rotated in the direction in which the second movable member 42 and the lever shaft 44 are loosened by operating the operation lever 43, the second movable member 42 and the first movable member 41 are rotated. Can move in a relatively separated direction, and the fixing of the slider 20 described above can be released. An O-ring 45 having an elastic force is interposed between the first movable member 41 and the second movable member 42, and the second movable member 42 is caused by the elastic force of the O-ring 45. And the first movable member 41 are biased in a direction in which they are relatively separated from each other.

  The contact surfaces 41a and 42a may have any shape as long as the base 10 can be securely gripped. To increase the frictional force between the base 10 and the contact surfaces 41a and 42a, a tooth shape or the like is used. It can be formed into various shapes or subjected to surface treatment.

[Second Embodiment]
In the finite motion guide device 1 according to the first embodiment described above, the finite motion guide device 1 including the gripping member 40a as the position holding mechanism 40 has been described. The finite motion guide device 100 according to the second embodiment to be described next will explain an example of the position holding mechanism 140 having a form different from that of the first embodiment. Note that members that are the same as or similar to those in the first embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 5 is a perspective view showing an example of a finite motion guide device according to the second embodiment, FIG. 6 is a cross-sectional view taken along line BB in FIG. 5, and FIG. 7 is related to the second embodiment. It is a figure for demonstrating operation | movement of a finite motion guide apparatus. Note that, in order to clarify the configuration of the position holding mechanism 140 of the finite motion guide device 100 according to the present embodiment, in the finite motion guide device 1 according to the first embodiment described above, FIG. It was described with the top and bottom reversed so that the bottom surface of the base 10 located on the top surface was described on the top surface.

  As shown in FIG. 5, the finite motion guide apparatus 100 according to the present embodiment includes a position holding mechanism 140 attached to the base 10.

  As shown in FIG. 6, the position holding mechanism 140 includes a fixed member 141 attached to the base 10 and a movable member 142 rotatably attached to the fixed member 141 via a pivot 144. In addition, a tooth-shaped engaging portion 142a is formed on the surface of the movable member 142 facing the slider 20.

  In addition, a tooth-shaped engaged portion 121 is formed on a surface of the slider 20 that faces the movable member 142, and the engaging portion 142 a and the engaged portion 121 mesh with each other as an engaging surface. Thus, the slider 20 can be fixed at an arbitrary position relative to the base 10.

  The movable member 142 is biased by the leaf spring 143 so as to be held at a position where the engaging portion 142a and the engaged portion 121 are engaged with each other. The movable member 142 is engaged by the elastic force of the leaf spring 143. The engagement between the portion 142a and the engaged portion 121 is not inadvertently released. Further, as shown in FIG. 5, the pivot 144 is attached in parallel with the movement direction F of the slider 20, and the rotation axis of the pivot 144 is attached in parallel with the movement direction F of the slider 20. If formed in this way, the rotational direction R of the movable member 142 and the moving direction F of the slider 20 are arranged substantially orthogonally, and the engaging portion 142a and the engaged portion 121 are engaged. When the slider 20 receives a load in the moving direction F of the slider 20, the load does not act in the rotation direction R of the movable member 142, and therefore the engagement between the engaging portion 142a and the engaged portion 121 is released by the load. Therefore, a strong braking force can be given to the moving direction of the slider 20.

  As shown in FIG. 7, when the movable member 142 is rotated via the pivot 144 against the elastic force of the leaf spring 143, the engagement between the engaging portion 142 a and the engaged portion 121 can be released. The slider 20 can be moved relative to the base 10.

  As described above, the finite motion guide apparatus 100 according to the present embodiment rotates the movable member 142 to engage the engaging portion 142a formed on the movable member 142 and the engaged member formed on the side surface of the slider 20. The engagement and disengagement with the joint portion 121 can be performed, and the position of the slider 20 moved to a desired position can be fixed.

  Next, with reference to FIGS. 8 and 9, an improvement example of the finite motion guide apparatus 100 according to the second embodiment will be described. In addition, about the member same or similar to the case of 1st Embodiment and 2nd Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 8 is a perspective view showing an example of a finite motion guide device according to an improved example of the second embodiment, and FIG. 9 is a cross-sectional view of the finite motion guide device according to an improved example of the second embodiment. . In addition, in FIG.8 and FIG.9, the finite motion guide apparatus 1 which concerns on 1st Embodiment mentioned above so that the structure of position holding mechanism 140 'of the finite motion guide apparatus 100' concerning this improved example may become clear. In FIG. 2, the top and bottom of the base 10 positioned below is described with the top and bottom reversed. Further, in the description of FIGS. 8 and 9, the description will be made by defining the vertical direction shown in FIGS. 8 and 9 as the vertical direction.

  As shown in FIG. 8, the finite motion guide device 100 ′ according to the improved example of the present embodiment includes a position holding mechanism 140 ′ attached to the base 10.

  The position holding mechanism 140 ′ includes a fixed member 141 ′ attached to the bottom surface of the base 10, and a movable member 142 ′ attached to the fixed member 141 ′ so as to be rotatable via a pivot 144 ′. The movable member 142 ′ includes a central portion 151 that extends along the longitudinal direction of the base 10, and a pair of side plate portions 152 a and 152 b that extend from both ends in the longitudinal direction of the central portion 151 in a direction perpendicular to the longitudinal direction. It is formed in a substantially U-shape. Thus, movable member 142 'is provided with the recessed part formed of the center part 151 and the side-plate parts 152a and 152b by being formed in substantially U shape. The movable member 142 ′ includes an engaging portion 142 b that meshes with a tooth-shaped engaged portion 121 formed on the side surface of the slider 20.

  The engaging portion 142b is formed on the surface of the engaging member 142a 'that faces the base 10 of the engaging member 142a' that is attached to the lower surface (on the surface facing the base 10) of the movable member 142 'by bolt fastening. It is formed along the longitudinal direction and over a range of length L. This length L is formed along the direction orthogonal to the longitudinal direction of the base 10, and indicates the distance from the upper end surface of the engaged portion 121 to the lower end surface of the engaging member 142a 'in FIG. . Further, a hinge portion is formed at the tip of the side plate portions 152a and 152b to rotatably hold the pivot 144 '. As shown in FIG. 8, similarly to the pivot 144 of the finite motion guide device according to the second embodiment described above, the pivot 144 ′ is attached in parallel with the moving direction F of the slider 20, and the rotation axis of the pivot 144 Are attached in parallel with the moving direction F of the slider 20. If formed in this way, the rotational direction R of the movable member 142 ′ and the moving direction F of the slider 20 are arranged substantially orthogonal to each other, and the engaging portion 142 a ′ and the engaged portion 121 engage with each other. When the mechanism 140 ′ receives a load in the moving direction F of the slider 20, the load does not work in the rotation direction R of the movable member 142 ′. Therefore, the engagement between the engaging portion 142 a ′ and the engaged portion 121 is caused by the load. A strong braking force can be given to the moving direction of the slider 20 without being released.

  The attachment position of the engaging member 142a ′ will be further described with reference to FIG. As described above, the engaging member 142 a ′ is attached to the lower surface of the movable member 142 ′ in FIG. 8, and the engaging portion 142 b is engaged with the engaged portion 121 formed on the side surface of the slider 20. The engaging portion 142b meshes with the engaged portion 121 over a length L, and the engaging portion 142b and the engaged portion 121 are engaged with each other by being engaged to overlap each other over a range of the length L. ing. Further, the center point P of the pivot is located on a virtual band X obtained by extending a range overlapped over the range of the length L in a direction orthogonal to the engaging portion 142b. Furthermore, as shown in FIG. 9, the fixing member 141 ′ includes a horizontal portion attached to the base 10 and a vertical portion that hangs downward from one end of the horizontal portion. It is formed in a substantially L shape. The pivot 144 ′ is disposed so as to penetrate the vertical portion in the longitudinal direction, and the fixed member 141 ′ is configured to have a substantially L-shaped cross section so that the pivot 144 ′, the engaged portion 121, and the engaged portion are engaged. The parts 142b are respectively disposed below the upper surface of the horizontal part of the fixing member 141 ′.

  Thus, the center point P of the pivot 144 ′ is obtained by extending the range of the length L that overlaps when the engaging portion 142b and the engaged portion 121 are engaged with each other in the direction orthogonal to the engaging portion 142b. If it arrange | positions so that it may be located on the virtual belt | band | zone X and the pivot 144 ', the to-be-engaged part 121, and the engaging part 142b are each arrange | positioned below the upper surface of the horizontal part of fixing member 141', the slider 20 will be in base 10. On the other hand, when a collision load is received when moving, the collision load transmitted to the position holding mechanism 140 ′ can be directed in the direction along the extending direction of the virtual belt X, and the pivot 144 ′ of the movable member 142 ′ can be directed. The moment force centered at can be theoretically made zero. Therefore, the movable member 142 ′ can be prevented from rotating around the pivot 144 ′ due to the collision load, and the engagement between the engagement member 142 a ′ and the engaged portion 121 can be prevented from being released due to the collision load. can do.

  Next, with reference to FIG. 8 again, the arrangement relationship between the fixed member 141 ′ and the movable member 142 ′ will be described. As shown in FIG. 8, the fixed member 141 ′ is disposed in a recess formed in the movable member 142 ′, and both end surfaces 153a and 153b in the longitudinal direction of the fixed member 141 ′ are respectively side plate portions of the movable member 142 ′. It faces 152a and 152b. As described above, when the fixed member 141 ′ is disposed in the concave portion of the movable member 142 ′, when the collision load is received from the longitudinal direction of the rail 10 (the B direction in FIG. 8), the collision load received by the fixed member 141 ′ is the end face. It can be transmitted to the side plate portion 152b via the 153b, and stress concentration due to the collision load being transmitted to the pivot 144 'and the hinge portion where it is difficult to increase the structural rigidity can be prevented. Accordingly, it is possible to provide a highly reliable finite motion guide device capable of preventing the pivot 144 ′ and the hinge portion from being damaged even when a collision load is received.

  Further, a coil spring 143 ′ as an urging means is attached to the pivot 144 ′ constituting the position holding mechanism 140 ′, and the movable member 142 ′ is engaged with the engaging member 142a ′ by the elastic force of the coil spring 143 ′. And the engaged portion 121 are urged in a direction to hold the engagement. As described above, when the coil spring 143 ′ is applied to the biasing means, it is possible to increase the turning angle even with a strong return force.

  In the finite motion guide apparatus 100 ′ according to the second embodiment described above, the movable member 142 ′ is formed in a substantially U shape, and the fixed member is formed in the recess formed by the center portion 151 and the side plate portions 152 a and 152 b. By arranging 141 ′, when a collision load is received from the longitudinal direction of the rail 10 (direction B in FIG. 8), the collision load received by the fixing member 141 ′ is transmitted to the side plate portion 152b via the end surface 153b. Therefore, it is possible to prevent stress concentration due to the collision load being transmitted to the pivot 144 ′ and the hinge part, which are difficult to increase in rigidity structurally. As a means for further simplifying the complicated structure in which the end surfaces 153a and 153b of the fixing member 141 ′ and the side plate portions 152a and 152b are in direct contact with each other, the center portion 151 of the fixing member 141 ′ is opposed to the central portion 151. A second engaged portion having the same tooth profile as that of the engaged portion 121 formed on the slider 20 is formed on the surface, and an engaging member 142 a ′ attached to the movable member 142 ′ is formed on the slider 20. While engaging with the to-be-engaged part 121, you may form so that it may engage with the 2nd to-be-engaged part formed in fixing member 141 '. As described above, when the engaging member 142a ′ is formed to engage both the slider 20 and the fixed member 141 ′, when the collision load is received from the longitudinal direction of the rail 10, the collision load received by the fixed member 141 ′. Can be transmitted to the engaging member 142a 'via the second engaged portion, and the fixing member 141' and the side plate portions 152a and 152b can be transmitted in a simpler configuration without being formed so as to be in direct contact with each other. It can be set as the structure which can prevent the stress concentration by a collision load being transmitted to pivot 144 'and a hinge part.

[Third Embodiment]
Next, with reference to FIG. 10, the Example at the time of applying the finite motion guide apparatus 1,100,100 'which concerns on the 1st and 2nd embodiment mentioned above as a vehicle seat rail is described.

  As shown in FIG. 10, the vehicle seat rail according to the present embodiment is attached by fastening the base 10 to the floor 61 in the passenger compartment with bolts or the like, and fastening the slider 20 to the bottom surface of the seat 60 with bolts or the like. ing.

  As described above, when the finite motion guide device 1, 100, 100 'according to this embodiment is applied as a seat rail for a vehicle, components such as the base 10 and the slider 20 are manufactured by a processing method such as cutting, forging, and casting. Therefore, it is possible to reduce the size of the components while ensuring the strength compared to the seat rails that have been manufactured by sheet metal processing. The seat surface can be set at a lower position in the passenger compartment.

  Further, since the finite motion guide devices 1, 100, 100 ′ according to the present embodiment can load loads other than the vertical direction, the mounting direction of the vehicle seat rail is not limited to the bottom surface of the seat 60, and the seat It is also possible to set the seat seat surface in the vehicle interior to a lower position by attaching to the side surface.

  In the third embodiment, the case where the finite motion guide devices 1, 100, 100 ′ according to the present embodiment are applied as vehicle seat rails has been described. However, the finite motion guide device 1 according to the present embodiment is described. , 100, 100 ′ are not limited to this, and can be applied to applications for guiding the movement of members such as drawers and various rails.

  Furthermore, in the finite motion guide apparatus 1, 100, 100 ′ according to the present embodiment described above, the plurality of rolling elements 30a, 30b freely roll on the rolling element rolling surface 11 and the loaded rolling element rolling surface 21. Although the case where it was possible was demonstrated, you may form so that several rolling elements 30a and 30b may be hold | maintained with a holder | retainer, and it may roll integrally.

  Furthermore, although the finite motion guide device 1, 100, 100 ′ according to the above-described embodiment has been described with respect to the case where it is manufactured using a metal such as steel or stainless steel, the base may be used depending on the required strength, service life, or the like. , Sliders, rolling elements, etc. may be made of synthetic resin.

  In the finite motion guide devices 100 and 100 ′ according to the second embodiment described above, the case where the engaged portion 121 and the engaging portions 142a and 142b are formed on one side surface of the moving member 20 has been described. The positions of these members may be formed symmetrically on the other side surface of the moving member 20. Further, in the finite motion guide apparatus 100 ′ according to the second embodiment described above, the pivot 144 ′ is arranged on one side of the base 10, and the movable member 142 ′ crosses the upper surface of the base 10 and the other side of the slider 20. In the above description, the engaged portion 121 and the engaging portion 142b formed on the side engage with each other. However, the pivot 144 ′ is disposed on the same side as the engaged portion 121 and the engaging portion 142b, and the movable member 142 ′ is disposed. However, the movable member 142 ′ may be arranged to mesh with the engaged portion 121 and the engaging portion 142 b without traversing the upper surface of the base 10 by rotating around the pivot 144 ′.

  Furthermore, in the finite motion guide devices 100 and 100 ′ according to the second embodiment described above, the engaged portion 121 and the engaging portions 142a and 142b are formed in a direction orthogonal to the longitudinal direction of the base 10. However, you may arrange | position so that the direction which these members mesh may incline with respect to the direction orthogonal to the longitudinal direction of the base 10. FIG. As described above, when the engaged portion 121 and the engaging portions 142a and 142b are formed to be inclined with respect to the direction orthogonal to the longitudinal direction, the movable member 142 is moved by the rotational movement about the pivots 144 and 144 ′. When the engagement between the engaged portion 121 and the engaging portions 142a and 142b is released by rotating, the end portions of the engaged portion 121 and the engaging portions 142a and 142b interfere with each other to inhibit the release of the engagement. Therefore, smooth engagement and release of engagement can be realized. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The finite motion guide device provided with the position holding mechanism of the present invention can be provided with a position holding mechanism without increasing the size of the finite motion guide device, and further, the component parts can be obtained by processing methods such as cutting, forging, and casting. Since it can be manufactured, it can be formed into a free shape such as a rectangular cross-section or a cross-sectional shape. For example, if it is applied to a vehicle seat rail, the size can be reduced or the seat mounting position can be freely maintained while maintaining the strength. Can be set.

1, 100, 100 'finite motion guide device, 10 base, 11 rolling element rolling surface, 12 mounting hole, 20 slider, 20a, 20b divided body, 21 load rolling element rolling surface, 30a, 30b rolling element, 40, 140, 140 ′ position holding mechanism, 41 first movable member, 42 second movable member, 43 operation lever, 44 lever shaft, 45 O-ring, 143 leaf spring, 121 engaged portion, 141, 141 ′ fixing member , 142, 142 ′ movable member, 142a, 142a ′, 142b engaging portion, 144, 144 ′ pivot, 60 seats, 61 floor.

Claims (8)

A base with rolling element rolling surfaces;
A slider that is movably assembled to the base and includes a loaded rolling element rolling surface facing the rolling element rolling surface;
In a finite motion guide device comprising a plurality of rolling elements interposed between the rolling element rolling surface and the loaded rolling element rolling surface,
A finite motion guide device comprising a position holding mechanism capable of braking the slider relative to the base at a substantially central portion in a longitudinal direction of either the base or the slider. The finite motion guide device according to claim 1,
The position holding mechanism includes a fixed member attached to either the base or the slider, and a movable member attached to the fixed member via a pivot.
The finite motion guide device is characterized in that the pivot is attached in parallel with the moving direction of the slider, and the rotation axis of the pivot is parallel to the moving direction of the slider. The finite motion guidance apparatus according to claim 2,
The finite motion guide device according to claim 1, wherein the position holding mechanism includes a biasing unit that biases the movable member in a rotation direction of the pivot. The finite motion guide device according to claim 1,
The movable member includes an engaging portion facing a side surface along the longitudinal direction of either the base or the slider,
The engaging portion is formed with a predetermined length in a direction orthogonal to the longitudinal direction, and is engaged with an engaged portion formed on a side surface along the longitudinal direction of either the base or the slider. Together
The center point of the pivot in the cross section orthogonal to the longitudinal direction is obtained by extending the overlapping range by engaging the engaging portion and the engaged portion in the direction orthogonal to the engaging portion. A finite motion guide device characterized by being located on a virtual band. The finite motion guidance device according to claim 2,
The movable member has a recess formed by a central portion extending along the longitudinal direction and side plate portions extending from both ends of the central portion in the longitudinal direction in a direction perpendicular to the longitudinal direction,
The fixed member is disposed in the concave portion, and both end portions in the longitudinal direction of the fixed member are opposed to the side plate portions, respectively. The finite motion guide device according to claim 1,
The position holding mechanism is attached to one of the base and the slider and includes a gripping member capable of gripping the other of the base and the slider. The finite motion guide device according to claim 6,
The gripping member is connected to the first movable member in conjunction with a first movable member attached to one of the base and the slider and an operation lever attached to the first movable member. A relatively movable second movable member,
A finite motion guide device characterized in that either the base or the slider is gripped by the second movable member and the first movable member.   A seat rail comprising the finite motion guide device according to any one of claims 1 to 7.

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