JP2018095152A - Slide rail support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a force required for sliding a seat while eliminating any play of an upper rail with respect to a lower rail at the time when locking in a slide rail support structure.SOLUTION: In a slide rail support structure, a brake mechanism including the upper and lower brakes 50, 60 is supported on the side plate 23 of an upper rail, and a lock arm 30 swinging around a pivot shaft 34 as a center in the directions approaching to and seceding from an inner side plate 14 is added to an upper rail 20. The claw 31 of the top of the lock arm 30 is inserted between the taper faces 51a, 61a facing the upper and lower brakes 50, 60 when approaching the inside plate 14 of a lower rail 10, raises the upper brake 50 and sends down the lower brake 60, press the brake shoes 52, 62 to the top and bottom plates 11, 12 of the lower rail 10, respectively and then, eliminates play at the time when locking. Since it is unnecessary to add a slide member to the upper rail 20, a slide operation at the time when unlocking is smoothly performed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a slide rail support structure.

  Patent Documents 1 and 2 are provided with a lower rail supported on the vehicle floor and an upper rail supported on the vehicle seat and slidable in the longitudinal direction with respect to the lower rail. 2. Description of the Related Art A slide rail support structure that enables a seat to slide with respect to a direction is known.

  In such a slide rail support structure, in order to smoothly slide the seat, a roller made of a rolling bearing or the like is attached to the upper rail, and the roller is inserted into the lower rail and rolls in the lower rail. It is designed to guide the upper rail.

  In this case, if there is a gap between the lower rail and the upper rail, when the roller rolls in the lower rail when the seat is slid, the roller repeatedly collides with the wall surface of the lower rail, causing a collision sound. It is harsh.

  Further, when positioning the seat in the front-rear direction, a lock arm attached to the upper rail and a lock hole provided in the lower rail and into which a claw at the tip of the lock arm is inserted (the lock mechanism of Patent Document 1) 4c) Although the upper rail is locked with respect to the lock arm, if there is a gap between the claw of the lock arm and the lock hole, the seat will rattle when seated on the seat, and the ride comfort is poor.

  Therefore, as in Patent Documents 1 and 2, a resin sliding member (a shoe 14 of Patent Document 1 and a resin slide shoe 50 of Patent Document 2) is attached to the upper rail, and the lower rail and the upper are attached by the sliding member. Attempts have been made to fill the gaps between the rails and eliminate rattling.

JP 2013-23039 A Japanese Patent No. 5708530

However, when the gap between the upper rail and the lower rail is filled with the sliding member, even if the sliding property of the sliding member is excellent, compared to the case without the sliding member, the frictional resistance is generated. When a sheet is slid, a large force is required.
In particular, in recent years, in vehicles such as minivans and SUVs (Sport Utility Vehicles), the seat can be slid long by increasing the length of the lower rail in order to improve the comfort of the interior space while realizing various seat arrangements. For vehicles with a long slide function of such a seat, if a sliding member that fills the gap between the upper rail and the lower rail is used, the lower rail is long, The force required to slide the seat is further increased.

  Therefore, the problem to be solved by the present invention is to reduce the force required to slide the seat while eliminating the rattling when the upper rail is locked to the lower rail in the slide rail support structure.

In order to solve the above-described problems, a slide rail support structure according to the invention is supported on a floor side of a vehicle and has a top rail and a bottom plate facing up and down, and is supported on a seat side of the vehicle. On the other hand, an upper rail slidable in the longitudinal direction, a brake mechanism supported on the upper rail between the top plate and the bottom plate of the lower rail, attached to the upper rail, and a claw at the tip end of the brake It is provided with a lock arm that can be switched between a lock position approaching the mechanism and an unlock position where the claw at the tip of the mechanism is separated from the brake mechanism.
In addition, the brake mechanism includes an upper brake and a lower brake that are opposed to each other in the vertical direction and are slidable in directions approaching and separating from each other.
Further, the lock arm has a claw at a tip portion thereof inserted between the upper brake and the lower brake facing surfaces at the lock position, so that the upper brake is placed on the top plate of the lower rail and the lower brake is placed on the lower brake. It is pressed against the bottom plate of the lower rail, and the claw at the tip is pulled out from the opposing surface of the upper brake and the lower brake at the unlock position.

With this configuration, at the lock position of the lock arm, the upper brake and the lower brake of the brake mechanism supported on the side plate of the upper rail are pressed against the top plate and the bottom plate of the lower rail, respectively. Since there is no gap between the upper rail and the lower rail, rattling of the upper rail with respect to the lower rail is prevented.
Since no sliding member for preventing rattling is provided on the upper rail, a large force is not required when sliding the upper rail.

  Further, the brake mechanism includes a spring that biases the upper brake and the lower brake toward each other, so that the upper brake is moved from the top plate of the lower rail by the biasing of the spring, and the lower brake is moved toward the lower rail. It is possible to more preferably perform the separation from the bottom plate.

Similarly, in the slide rail support structure according to the invention, the brake mechanism is slidable in a direction opposite to the upper and lower sides and fixed to the upper rail so as not to move, and in a direction toward and away from the stator. And an upper brake located above the stator.
The lock arm has a claw at a tip thereof inserted between the opposed surfaces of the stator and the upper brake at the lock position, thereby pressing the upper brake against the top plate of the lower rail, and at the unlock position. The claw at the tip is extracted from the opposing surface of the stator and upper brake.
Even if comprised in this way, since an upper brake is pressed on the top plate of a lower rail, since the clearance gap between an upper rail and a lower rail is lose | eliminated, rattling with respect to the lower rail of an upper rail is prevented.

  Further, the brake mechanism has a spring that urges the upper brake toward the stator so that the upper brake is separated from the top plate of the lower rail by the urging of the spring. It can be carried out.

Alternatively, in the slide rail support structure according to the invention, the brake mechanism is disposed below the stator fixed so as not to move with respect to the upper rail and the stator slidable in a direction approaching and separating from the stator. And a lower brake that is positioned.
Then, the lock arm, in the locked position, the claw at the tip thereof is inserted between the opposed surfaces of the stator and the lower brake, thereby pressing the lower brake against the bottom plate of the lower rail, in the unlocked position, The claw at the tip is extracted from the opposing surface of the stator and the lower brake.
Even if comprised in this way, since a gap between an upper rail and a lower rail is lost because a lower brake is pressed against a bottom plate of a lower rail, rattling with respect to a lower rail of an upper rail is prevented.

  Furthermore, the brake mechanism has a spring that biases the lower brake toward the stator so that the lower brake is separated from the bottom plate of the lower rail by the bias of the spring. Can do.

In the slide rail support structure of the present invention, at least one of the opposed surfaces of the upper brake and the lower brake, or at least one of the opposed surfaces of the stator and the upper brake or the lower brake is a difference in the claw of the lock arm. It is preferably a tapered surface whose interval narrows in the insertion direction.
This makes it easier to insert the lock arm claw between the opposing surfaces of the brake mechanism, and when the lock arm claw is inserted between the opposite surfaces, the upper brake is pushed up smoothly and the lower brake is pushed down smoothly. To be done.

In the slide rail support structure of the present invention, the lower rail has a side plate that connects the top plate and the bottom plate, and a lock hole is formed on the side plate in parallel in the longitudinal direction. The upper rail can swing in a direction approaching and moving away from the side plate about a swinging shaft whose axial center and the direction of the axis coincide with each other. It is preferable that the hook is inserted into the lock hole, and the claw at the tip of the lock hole is extracted from the lock hole of the lower rail at the unlock position.
In this way, the upper rail and the lower rail are more firmly fixed at the time of locking.

In the slide rail support structure of the present invention, it is preferable that the lock arm has a tapered shape in which a thickness of the lock arm decreases toward a tip.
This makes it easier to insert the lock arm claw between the opposing surfaces of the brake mechanism, and when the lock arm claw is inserted between the opposite surfaces, the upper brake is pushed up smoothly and the lower brake is pushed down smoothly. To be done.

  Since the slide rail support structure according to the present invention is configured as described above, it is possible to reduce the force required to slide the seat while eliminating rattling when the upper rail is locked to the lower rail.

Partially broken side view of slide rail support structure 1 is an enlarged view of the main part of FIG. (a) is AA sectional drawing of FIG. 2, (b) is the principal part enlarged view of (a). BB sectional view of FIG. Perspective view of slide rail support structure excluding lower rail Lock arm perspective view (a) is a figure which shows the unlocking state in Fig.3 (a), (b) is a principal part enlarged view of (a). CC sectional view of FIG. 7 (b) The principal part enlarged view which shows the other example of a slide rail support structure The principal part enlarged view which shows the other example of a slide rail support structure

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the slide rail support structure 1 of the embodiment includes a lower rail 10 that is attached to a floor surface F of a vehicle, an upper rail 20 that is attached to a seat S and is slidable along the longitudinal direction of the lower rail 10, The lock arm 30 and the brake mechanisms 40 to 70 are switchable between a state in which the seat S can be slid and a state in which the seat S cannot be slid.
The action of the lock arm 30 and the brake mechanisms 40 to 70 suppresses the rattling of the seat S when the seat S is stationary, that is, when the upper rail 20 is locked to the lower rail 10.

As shown in FIG. 1 to FIG. 3, the lower rail 10 includes a top plate 11 and a bottom plate 12 that face each other vertically, an outer plate 13 positioned on a pair of left and right sides, and an inner plate 14 positioned on the inside. Become. The pair of outer plates 13 connect the left and right edges of the top plate 11 and the left and right edges of the bottom plate 12, respectively.
In the top plate 11, an opening 11 a extending along the longitudinal direction of the lower rail 10 is formed at the center in the width direction. The pair of inner plates 14 hang downward from the left and right edges of the opening 11 a of the top plate 11.
The bottom plate 12 of the lower rail 10 is attached to the floor F of the vehicle by appropriate means such as bolting. In this attached state, the longitudinal direction of the lower rail 10 coincides with the longitudinal direction of the vehicle.
As shown in FIGS. 3 to 5, one inner plate 14 of the lower rail 10 is provided with a lock hole 14 a that is a rectangular through hole in parallel in the longitudinal direction of the lower rail 10.
Further, the ceiling plate 11 of the lower rail 10 has a regulation slope 11b at the boundary with the outer plate 13.

As shown in FIG. 1 to FIG. 3 and FIG. And a pair of left and right side plates 23 folded back.
The base 21 of the upper rail 20 is attached to the bottom surface of the seat S by appropriate means such as bolting. In this attached state, the longitudinal direction of the upper rail 20 coincides with the front-rear direction of the seat S.
As shown in FIG. 3, the branch portion 22 and the side plate 23 of the upper rail 20 are inserted into the inside through the opening 11 a of the lower rail 10.
In this state, the pair of left and right side plates 23 of the upper rail 20 are positioned between the left outer plate 13 and the left inner plate 14 of the lower rail 10, and between the right outer plate 13 and the right inner plate 14, respectively. ing.
A roller 24 is attached to each of the front end portion and the rear end portion of the left and right side plates 23 of the upper rail 20. When the upper rail 20 is slid, each roller 24 rolls around a rotation shaft 24 a perpendicular to the longitudinal direction of the upper rail 20 to guide the upper rail 20. Although the kind of roller 24 is not specifically limited, The rolling bearing which consists of an inner ring | wheel, an outer ring | wheel, and the rolling element which rolls between the rolling surfaces which an inner ring | wheel and an outer ring | wheel oppose can be illustrated.

As shown in FIGS. 1 to 3 and 5, one side plate 23 of the upper rail 20 is provided with a plurality of rectangular windows 23 a parallel to the longitudinal direction of the upper rail. The number of windows 23a is not particularly limited, but is three in the figure. Here, the window 23a of the upper rail 20 and the lock hole 14a of the lower rail 10 face each other.
A predetermined range between the front and rear rollers 24 on the left and right sides of the upper rail 20 is cut out from the base portion 21 to the branch portion 22 to form a cutout portion 25. A pair of front and rear flanges 25a projecting perpendicularly to the longitudinal direction of the upper rail 20 is formed on the front edge and the rear edge.
The cutout portion 25 formed from the base portion 21 to the branch portion 22 and the window 23a formed in the side plate 23 face each other in the left-right direction of the upper rail 20.

As shown in FIGS. 1 to 3 and 5, the lock arm 30 is accommodated in the notch 25 of the upper rail 20.
As shown in FIG. 6, the lock arm 30 is curved in a substantially arc shape with respect to the vertical direction, although the whole is square. A plurality of claws 31 are provided at the front end portion located at the lower end of the lock arm 30, and the connecting portion 32 connected directly or indirectly to an operation lever (not shown) at the rear end portion located at the upper end. Is provided.
The claw 31 of the lock arm 30 has a tapered shape in which the thickness gradually decreases toward the tip.
The number of claws 31 of the lock arm 30 is not particularly limited, but is three in the figure.
Here, the interval between the claws 31 in the lock arm 30 and the interval between the lock holes 14 a arranged in parallel along the longitudinal direction of the lower rail 10 are substantially equal.

As shown in FIG. 6, a pair of flanges 33 are provided on both sides of the lock arm 30. As shown in FIGS. 2 and 6, the flange 33 is overlapped with a pair of front and rear flanges 25a provided at the edge of the notch 25 of the upper rail 20, and both the flanges 33 and 25a penetrate the plate surface. Are coupled by a pair of front and rear swing shafts 34.
Here, the direction of the axis of the swing shaft 34 coincides with the longitudinal direction of the upper rail 20 and the lower rail 10.
For this reason, by operating an operation lever (not shown), the lock arm 30 moves to the locked position as shown in FIG. It can swing up and down with respect to the lock position.

As shown in FIG. 3, a swing spring 35 is built in each cylindrical base portion 21 of the upper rail 20, and one leg portion 35 a is formed on the protrusion 21 a provided on the inner surface of the base portion 21, and the other side. The leg portions 35 a are respectively engaged with the cut and raised portions 36 of the lock arm 30.
In this locked state, the swinging spring 35 is twisted in a direction in which the leg portions 35a at both ends approach each other, and therefore a restoring force is generated in a direction in which the leg portions 35a at both ends are separated from each other. As a result, the lock arm 30 is biased toward the lock position.
That is, in a normal state where no external force is applied, the lock arm 30 is in the locked position.

  As shown in FIGS. 2 to 5, the brake mechanism includes a casing 40 positioned on the outer surface of the side plate 23 of the upper rail 20, an upper brake 50 accommodated in the casing 40 on the upper side, and a lower brake accommodated in the lower side. 60 and a slide spring 70.

The casing 40 has a U-shape including a top plate 41 and a bottom plate 42 that are vertically opposed to each other, and a side plate 43 that connects one of the left and right side edges of the top plate 41 and the bottom plate 42. In the casing 40, the side edges of the top plate 41 and the bottom plate 42 that are not connected to the side plate 43 are brought into contact with the outer surface of the side plate 23 of the upper rail 20, and are fixed by appropriate means such as welding.
The side plates 43 of the casing 40 are formed with windows 43a that are arranged in parallel in the longitudinal direction, and the windows 43a are opposed to the windows 23a provided on the side plate 23 of the upper rail 20 on a one-to-one basis.
The top plate 41 and the bottom plate 42 of the casing 40 are provided with insertion holes 41a and 42a, respectively.

The upper brake 50 and the lower brake 60 include brake main bodies 51 and 61 extending in the longitudinal direction of the upper rail 20, and brake shoes 52 and 62 extending perpendicularly to the brake main bodies 51 and 62 from intermediate portions of the brake main bodies 51 and 61. T-shaped shape consisting of
The upper brake 50 and the lower brake 60 have their brake bodies 51 and 61 accommodated in the casing 40, respectively, and part of their brake shoes 52 and 62 project outside the casing 40 through the insertion holes 41a and 42a.
Pin-shaped stoppers 53 and 63 projecting in the front-rear direction are continuously provided at locations outside the casing 40 of the brake shoes 52 and 62.
The stoppers 53 and 63 and the brake main bodies 51 and 52 in the casing 40 prevent the upper brake 50 and the lower brake 60 from coming off from the insertion holes 41a and 42a of the casing 40, and the vertical sliding amount is restricted. .

The bottom surface of the brake main body 51 of the upper brake 50 and the top surface of the brake main body 61 of the lower brake 60 are vertically opposed to each other, and taper surfaces 51a and 61a that become narrower as the distance from the side plate 23 of the upper rail 20 decreases. ing.
The inclination angles of the tapered surfaces 51a and 61a are not particularly limited, but can be exemplified as being 10 to 15 degrees with respect to the horizontal plane.

The brake main body 51 of the upper brake 50 and the brake main body 61 of the lower brake 60 are provided with locking pins 54 and 64 protruding in the front-rear direction, and the slide spring 70 is extended at both ends thereof. Are locked to the locking pins 54 and 64, respectively.
Due to the restoring force of the slide spring 70, the upper brake 50 and the lower brake 60 are urged in a direction in which the tapered surfaces 51a and 52a approach each other.

The brake main body 51 of the upper brake 50 has a tapered lower surface side of the tapered surface 51a (a side close to the side plate 23 of the upper rail 20) cut obliquely to form a guide surface 51b continuous with the tapered surface 51a. . The inclination angle of the guide surface 51b with respect to the horizontal plane is larger than the inclination angle of the tapered surface 51a with respect to the horizontal plane.
Further, the brake shoe 52 of the upper brake 50 has a chamfered portion 52a formed by notching the outside of the top surface obliquely. The inclination angle of the chamfered portion 52a with respect to the horizontal plane is substantially equal to the inclination angle of the regulation slope 11b of the top plate 11 of the lower rail 10 with respect to the horizontal plane.
The material and manufacturing method of the upper brake 50 and the lower brake 60 are not particularly limited, but the material is preferably a material having a high friction effect, and examples of the manufacturing method include sintering, forging, and pressing.

The configuration of the slide rail support structure according to the embodiment is as described above. Next, the operation thereof will be described.
As shown in FIGS. 3 and 4, when the lock arm 30 is in the locked position, the pawl 31 is connected to the upper brake 50 and the lower brake 60 through the lock hole 14 a of the lower rail 10, the window 23 a of the upper rail 20, and the window 43 a of the casing 40. It is inserted between the tapered surfaces 51a, 61a facing each other.
7 and 8, at the unlocked position of the lock arm 30, the pawl 31 is extracted from between the tapered surfaces 51a, 61a facing the upper brake 50 and the lower brake 60, and the window 43a of the casing 40, It is also extracted from the window 23 a of the upper rail 20 and the lock hole 14 a of the lower rail 10.

As shown in FIGS. 3 and 4, when the lock arm 30 is in the locked position, the upper rail 20 is prevented from sliding with respect to the lower rail 10 due to the engagement between the claw 31 and the lock hole 14 a.
When the lock arm 30 is in the locked position, the upper brake 50 is pushed up to the claw 31 against the bias of the slide spring 70 by the wedge action of the tapered surfaces 51 a and 61 a, and the lower brake 60 is moved to the claw 31. Pushed down.
As a result, the brake shoe 52 of the upper brake 50 is pressed against the top plate 11 of the lower rail 10 and the brake shoe 62 of the lower brake 60 is pressed against the bottom plate 12 of the lower rail 10.
At this time, the entire surface of the chamfered portion 52 a provided on the brake shoe 52 of the upper brake 50 is in contact with the regulation slope 11 b of the top plate 11 of the lower rail 10.

Only the fit between the claw 31 of the lock arm 30 and the lock hole 14a of the lower rail 10 causes rattling of the gap between the claw 31 and the lock hole 14a. However, the brake mechanism causes the upper rail 20 and the lower rail 10 to As a result, there is no vertical gap between the upper rail 20 and the upper rail 20 when the lock is locked.
In addition, the frictional action between the brake shoes 52 and 62 and the top plate 11 and the bottom plate 12 of the lower rail 10 prevents backlash in the front-rear direction and the left-right direction of the upper rail 20 when locked.
In addition, the entire surface of the chamfered portion 52a of the upper brake 50 and the regulation slope 11b of the lower rail 10 come into contact with each other, so that one of the left and right directions of the upper rail when locked (the insertion direction of the claw 31 of the lock arm 30). Shaking back is also prevented.

By grasping an operating lever (not shown) connected to the connecting portion 32 of the lock arm 30, the lock arm 30 is moved from the lock position shown in FIGS. When the swing operation is performed toward such an unlock position, the claw 31 comes out from between the tapered surfaces 51 a and 61 a of the upper brake 50 and the lower brake 60 facing each other.
Since the nail | claw 31 comes out in the direction where the space | interval between the taper surfaces 51a and 61a expands, the switching to an unlocking position is performed smoothly.
When the pawl 31 comes out, the upper brake 50 is lowered and the lower brake 60 is raised by the urging of the slide spring 70, and is separated from the top plate 11 and the bottom plate 12 of the lower rail 10. As a result, the pressing between the upper brake 50 and the top plate 11 of the lower rail 10 and the pressing between the lower brake 60 and the bottom plate 12 of the lower rail 10 are released.
At the unlocked position of the lock arm 30, the claw 31 also comes out of the lock hole 14 a provided in the inner plate 14 of the lower rail 10.
Brake by the upper brake 50 and the lower brake 60 is released, and the engagement between the claw 31 of the lock arm 30 and the lock hole 14a of the inner plate 14 of the lower rail 10 is released, so that the upper rail 20 is in contact with the lower rail 10. The unlocked state is established, and the upper rail 20 is slidable in the longitudinal direction of the lower rail 10.

After the seat S attached to the upper rail 20 is moved to an appropriate position and then the operation lever is released, the lock arm 30 is automatically swung from the unlock position to the lock position by the bias of the swing spring 35. And return.
Then, the upper brake 50 and the lower brake 60 are automatically pressed against the lower rail 10 by the urging force of the swing spring 35, and the upper rail 20 is locked again with respect to the lower rail 10. Because the spring automatically returns, the operation force is small.
When the claw 31 of the lock arm 30 is inserted between the tapered surfaces 51a, 61a facing the upper brake 50 and the lower brake 60, the claw 31 has a tapered shape in which the thickness gradually decreases toward the tip. In addition, since the guide surface 51b of the upper brake 50 exists at the starting end of the insertion, smooth insertion is realized.

  The embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, and includes all modifications and variations that fall within the scope of the claims and equivalents thereto.

In the embodiment, the lock arm 30 is swingable. However, the present invention is not limited to this. For example, the lock arm 30 is configured to be linearly movable, and the claw 31 is inserted into the lock hole 14a of the lower rail 10 when moving forward. The claw 31 may be extracted from the lock hole 14 a of the lower rail 10.
The formation position of the lock hole 14a in the lower rail 10 is not limited to the inner plate 14 and may be the outer plate 13 or the like. In that case, the lock arm 30 is configured to be able to approach and separate from the outer side plate 13, and the claw 31 can be inserted into and removed from the lock hole 14 a of the inner side plate 14.

The slide spring 70 in the brake mechanism is not limited to a coil shape or a bellows shape as in the embodiment, and may be a leaf spring, for example, as shown in FIG.
In FIG. 9, a leaf spring-like slide spring 70 that is bent in a dogleg shape has one end provided on the top surface of the brake body 51 of the upper brake 50 and the bottom surface of the brake body 61 of the lower brake 60. It fixes to the groove bottom of groove | channel 51c, 61b by appropriate means, such as fixing pin 71, and the contact part 72 which the other end curves is contact | abutted to the top plate 41 and the bottom plate 42 of the casing 40, respectively.
For this reason, the upper brake 50 and the lower brake 60 are urged so as to approach each other.
FIG. 9 shows an unlocked state. In the locked state, the spring 70 is accommodated in the spring grooves 51c and 61b as the upper brake 50 is raised and the lower brake 60 is lowered.

  In the embodiment, the brake mechanism includes both the upper brake 50 and the lower brake 60. However, the brake mechanism may include only one of them.

For example, in FIG. 10A, the brake mechanism includes a casing 40, an upper brake 50, a slide spring 70, and a stator 80. About the casing 40, the upper brake 50, and the slide spring 70, it is the structure similar to embodiment.
The stator 80 is accommodated below the upper brake 50 in the casing 40 and is fixed to the bottom plate 42 so as not to move by appropriate means.
On the top surface of the stator 80 facing the bottom surface of the brake main body 51 of the upper brake 50, a tapered surface 81 is provided whose interval is narrowed away from the side plate 23 of the upper rail 20.
One end of the slide spring 70 is locked to the locking pin 54 of the upper brake 50, and the other end is fixed to the bottom plate 42 of the casing 40 by appropriate means. Thereby, the upper brake 50 is urged in a direction approaching the stator 80, that is, in a downward direction.
When the pawl 31 of the lock arm 30 is inserted between the opposing tapered surfaces 51a and 81 of the upper brake 50 and the stator 80, the upper brake 50 rises against the bias of the slide spring 70, and the brake shoe 52 It is pressed against the top plate 11 of the lower rail 10.
The roller 24 of the upper rail 20 that has been pushed down comes into contact with the bottom plate 12 of the lower rail 10 due to the weight of the upper rail 20 or the reaction force accompanying the pressing of the brake shoes 52 against the top plate 11 of the lower rail 10. The vertical gap is eliminated between the upper rail 20 and the lower rail 10.

For example, in FIG. 10B, the brake mechanism includes a casing 40, a lower brake 60, a slide spring 70, and a stator 80. About the casing 40, the lower brake 60, and the slide spring 70, it is the structure similar to embodiment.
The stator 80 is housed on the upper side of the lower brake 60 in the casing 40, and is fixed to the top plate 41 so as not to move by appropriate means.
On the bottom surface of the stator 80 facing the top surface of the brake main body 61 of the lower brake 60, a tapered surface 81 is provided in which the interval is narrowed away from the side plate 23 of the upper rail 20.
In addition, the inclined lower end side of the tapered surface 81 is cut obliquely, and a guide surface 82 that is continuous with the tapered surface 81 is formed. The inclination angle of the guide surface 82 with respect to the horizontal plane is larger than the inclination angle of the tapered surface 81 with respect to the horizontal plane.
One end of the slide spring 70 is locked to the locking pin 64 of the lower brake 60, and the other end is fixed to the top plate 41 of the casing 40 by appropriate means. Thereby, the lower brake 60 is urged in a direction approaching the stator 80, that is, in a rising direction.
When the pawl 31 of the lock arm 30 is inserted between the opposing tapered surfaces 61a and 81 of the lower brake 60 and the stator 80, the lower brake 60 descends against the bias of the slide spring 70, and the brake shoe 62 is It is pressed against the bottom plate 12 of the lower rail 10.
The top rail 11 of the lower rail 10 is brought into contact with the roller 24 of the upper rail 20 that is pushed up by the reaction force accompanying the pressing of the brake shoe 62 against the bottom plate 12 of the lower rail 10. There is no gap in the vertical direction.

In the embodiment, the tapered surfaces 51a and 61a are provided on both the upper brake 50 and the lower brake 60, but may be provided only on one side. The same applies to the combination of the upper brake 50 and the stator 80, and the lower brake 60 and the stator 80.
In the embodiment, the regulation slope 11b is provided on the top plate 11 of the lower rail 10 and the chamfered portion 52a is provided on the upper brake 50 of the brake mechanism. However, the regulation slope is provided on the bottom plate 12 of the lower rail 10 and the chamfered portion is provided on the lower brake 60. May be provided.
In the embodiment, the brake mechanism is provided only on one of the left and right sides of the upper rail 20. However, as long as the sliding operation of the seat S and the seating on the seat S are not hindered, the brake mechanism may be provided on both the left and right sides. it can.
The slide spring 70 and the swinging spring 35 can be omitted.

DESCRIPTION OF SYMBOLS 1 Slide rail support structure 10 Lower rail 11 Top plate 11a Opening 11b Restricted slope 12 Bottom plate 13 Outer plate 14 Inner plate 14a Lock hole 20 Upper rail 21 Base 21a Protrusion 22 Branching portion 23 Side plate 23a Window 24 Roller 24a Rotating shaft 25 Notch 25a Flange 30 Lock arm 31 Claw 32 Connecting portion 33 Flange 34 Oscillating shaft 35 Oscillating spring 35a Leg portion 36 Cutting and raising 40 Casing 41 Top plate 41a Insertion hole 42 Bottom plate 42a Insertion hole 43 Side plate 43a Window 50 Upper brake 51 Brake body 51a Tapered surface 51b Guide surface 51c Spring groove 52 Brake shoe 52a Chamfer 53 Stopper 54 Lock pin 60 Lower brake 61 Brake body 61a Tapered surface 61b Spring groove 62 Brake shoe 63 Stopper 64 Lock pin 70 Slide Roots 71 fixed pin 72 abutting portion 80 stator 81 taper surface 82 guide surface S seat F floor

Claims (11)

A lower rail supported on the floor side of the vehicle and having a top plate and a bottom plate facing up and down;
An upper rail supported on the vehicle seat side and slidable in the longitudinal direction with respect to the lower rail;
A brake mechanism supported on the upper rail between the top and bottom plates of the lower rail;
A lock arm attached to the upper rail and switchable between a locked position where a claw at the tip of the claw approaches the brake mechanism and an unlock position where a claw at the tip of the claw separates from the brake mechanism; Prepared,
The brake mechanism is
It has an upper brake and a lower brake that are slidable in the directions facing each other and approaching and separating from each other,
The lock arm is
In the locked position, the claw at the tip is inserted between the opposed surfaces of the upper brake and the lower brake, so that the upper brake is pressed against the top plate of the lower rail, and the lower brake is pressed against the bottom plate of the lower rail,
A slide rail support structure in which a claw at a tip of the claw at the unlocked position is extracted from a facing surface of the upper brake and the lower brake.   2. The slide rail support structure according to claim 1, wherein at least one of opposing surfaces of the upper brake and the lower brake is a tapered surface whose interval is narrowed toward a direction in which the claw of the lock arm is inserted. The brake mechanism is
A spring that urges the upper brake and the lower brake to approach each other;
2. The slide rail support structure according to claim 1, wherein the upper brake is separated from the top plate of the lower rail and the lower brake is separated from the bottom plate of the lower rail by urging of the spring. 3. A lower rail supported on the floor side of the vehicle and having a top plate and a bottom plate facing up and down;
An upper rail supported on the vehicle seat side and slidable in the longitudinal direction with respect to the lower rail;
A brake mechanism supported on the upper rail between the top and bottom plates of the lower rail;
A lock arm attached to the upper rail and switchable between a locked position where a claw at the tip of the claw approaches the brake mechanism and an unlock position where a claw at the tip of the claw separates from the brake mechanism; Prepared,
The brake mechanism is
A stator fixed immovably to the upper rail;
An upper brake located above the stator that is slidable in a direction approaching and separating from the stator;
Have
The lock arm is
In the locking position, the claw at the tip is inserted between the opposing surfaces of the stator and the upper brake, thereby pressing the upper brake against the top plate of the lower rail,
A slide rail support structure in which a claw at a tip of the claw is pulled out from a facing surface of the stator and an upper brake at the unlock position.   5. The slide rail support structure according to claim 4, wherein at least one of the opposing surfaces of the stator and the upper brake is a tapered surface whose interval is narrowed in a direction in which the claw of the lock arm is inserted. The brake mechanism further includes a spring that biases the upper brake in a direction approaching the stator,
The slide rail support structure according to claim 4, wherein the upper brake is separated from the top plate of the lower rail by the biasing of the spring. A lower rail supported on the floor side of the vehicle and having a top plate and a bottom plate facing up and down;
An upper rail supported on the vehicle seat side and slidable in the longitudinal direction with respect to the lower rail;
A brake mechanism supported on the upper rail between the top and bottom plates of the lower rail;
A lock arm attached to the upper rail and switchable between a locked position where a claw at the tip of the claw approaches the brake mechanism and an unlock position where a claw at the tip of the claw separates from the brake mechanism; Prepared,
The brake mechanism is
A stator fixed immovably to the upper rail;
A lower brake positioned below the stator that is slidable in a direction toward and away from the stator,
The lock arm is
In the locked position, the claw at the tip is inserted between the opposing surfaces of the stator and the lower brake, thereby pressing the lower brake against the bottom plate of the lower rail,
A slide rail support structure in which a claw at the tip of the claw is pulled out from a facing surface of the stator and a lower brake at the unlock position.   The slide rail support structure according to claim 7, wherein at least one of the opposing surfaces of the stator and the lower brake is a tapered surface whose interval is narrowed in a direction in which the claw of the lock arm is inserted. The brake mechanism further includes a spring that biases the lower brake in a direction approaching the stator,
The slide rail support structure according to claim 7, wherein the lower brake is separated from the bottom plate of the lower rail by the biasing of the spring. The lower rail has a side plate that connects the top plate and the bottom plate, and a lock hole arranged in parallel in the longitudinal direction is formed on the side plate,
The lock arm is swingable in a direction approaching and moving away from the side plate around a swing shaft whose axial center coincides with the longitudinal direction of the upper rail. The slide rail support structure according to any one of claims 1 to 9, wherein a claw is inserted into a lock hole of the lower rail, and a claw at a tip of the claw is extracted from the lock hole of the lower rail at the unlock position. .   The slide rail support structure according to any one of claims 1 to 10, wherein the lock arm has a tapered shape in which a thickness of a claw decreases toward a tip.

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