JPH03224835A - Seat slide device - Google Patents

Abstract

PURPOSE:To display high strength against an impact by applying the constitution wherein a lever fitting part for supporting an operation lever having a locking claw member secured to an axis and a rising wall for mounting a belt anchor are integrally formed with a bracket, and this bracket is fixed to a movable rail. CONSTITUTION:A pair of fixed rails 2 laid on the left and right side of the vehicle floor are constituted with a flat base 3 positioned at widthwise center, and inverted U-shape portions 4 and 5 at both sides of the base 3. Plural pairs of locking windows 17 and 18 on the vertical divisions 11 and 12 of one 4 of the inverted U-shape portions 4 and 5 are positioned at an equal pitch in a lengthwise direction. On the other hand, a movable rail 21 coupled to the fixed rail 2 is constituted with a flat portion 22 positioned at widthwise center, and U-shape portions 23 and 24 at both right and left sides thereof, and a bracket 40 is fixed to the top of the movable rail 21. This bracket 40 is formed by integrating the rising wall 42 for fitting a belt anchor, with lever fitting parts 43 and 44 for supporting an operation lever 55 having a locking claw member 50 fixed to an axis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seat slide device used for a seat of a vehicle such as an automobile.

[Prior Art] The anchor of the buckle portion of a seat belt used in an automobile seat is fixed to the floor of the vehicle body or connected to the movable rail side of a seat slide device. In the case of the latter, that is, the so-called belt-in-slide type in which the anchor is connected to the movable rail side, the anchor was conventionally fixed to the movable rail with rivets, etc., as seen in, for example, Japanese Patent Application Laid-open No. 81311. The seat slide device includes the above movable rail and a fixed rail that supports the movable rail so as to be slidable in the longitudinal direction, and the movable rail is moved to a desired longitudinal position with respect to the fixed rail by a locking mechanism. It can be fixed in place.

The mounting portion of the operating lever of this locking mechanism is provided on the movable rail.

[Problems to be Solved by the Invention] In the conventional seat slide device described above, the load input to the seat belt at the time of a collision is input to the movable rail, the fixed rail, etc. via the anchor. Therefore, this type of seat slide device must have sufficient strength to withstand the above-mentioned load, and these input load conditions tend to increase in recent years.

Conventionally, this type of seat slide device required a relatively large number of parts to increase its strength and was also heavy. For example, when an anchor bracket and a lever mounting bracket are separately provided on a movable rail, it is difficult to arrange the brackets because these brackets need to be provided at positions where they do not interfere with each other. Further, if a sturdy bracket is used that can suppress deformation of the movable rail or the like in the event of a collision, problems such as increased weight will arise.

Therefore, an object of the present invention is to provide a seat slide device that can exhibit high strength while using a relatively small number of parts.

[Means for Solving the Problems] A seat slide device of the present invention developed to achieve the above object is provided with inverted U-shaped portions facing inward on both sides of a fixed rail, and a pair of inverted U-shaped portions. Lock windows facing each other are provided in the vertical walls of the movable rail, and U-shaped portions are provided on both sides of the movable rail that are bent in a U-shape facing outward. Furthermore, the bracket fixed to the movable rail is integrally provided with a rising wall for attaching a seatbelt anchor, and the bracket is provided with an intermediate opening for positioning the movable rail in a desired longitudinal position relative to the fixed rail. A lever attachment part for a locking mechanism for fixing is provided, and a deformation-preventing convex part that protrudes from the bottom side of the bracket toward the inverted U-shaped part of the fixing rail is integrally provided on this bracket.
Further, the locking mechanism is provided with a claw member that can be inserted into both the pair of lock windows and the intermediate opening at the same time.

[Operation] Belt input caused by a collision or the like is applied to the movable rail via the bracket, and is further applied as a force that stretches the inverted U-shaped portion of the fixed rail upward. However, since the inverted U-shaped part of the lever is prevented from deforming in the above direction by the deformation suppressing convex part provided on the bracket, excessive plastic deformation that causes the inverted U-shaped part to come off the U-shaped part can occur. is prevented.

Also, when the pawl member is in the locked state, this pawl member is
It is inserted through both a pair of lock windows provided in the shaped part and an intermediate opening located between these lock windows,
Since the claw member is thereby supported on both sides, this locking mechanism can exhibit extremely high strength against loads in the front and rear directions.

[Example] An example of the present invention will be described below with reference to the drawings. The seat slide device 1 of this embodiment, like the conventional one, includes a pair of fixed rails 2 (only one of which is shown) installed on the left and right sides of the lower surface side of a seat seat (not shown).

The fixed rail 2 is made by bending a thick metal plate into the following shape by press working, and as shown in Fig. 1, it has a flat base 3 located at the center in the width direction, and a flat base 3 on both left and right sides of this base 3. It is comprised of a pair of inverted U-shaped portions 4.degree. 5 that are bent upwardly and inwardly into an inverted U-shape. Inverted U
The shaped portion 4.5 is formed along the longitudinal direction of the fixed rail 2.

As shown in FIG. 5, etc., connecting parts 6 and 7 are attached to the front and rear parts of the fixed rail 2, respectively, and a member 8 on the floor side of the vehicle body ( (only part shown).

The inverted U-shaped portion 4.5 has a pair of vertical walls 11°, 12.
13.14, and an upwardly convex curved portion 15.16.

A plurality of pairs of lock windows 17 and 18 are provided on the vertical walls 11 and 12 of one of the inverted U-shaped portions 4 in the longitudinal direction of the fixed rail 2 and arranged at equal pitches. As shown in FIG. 4, each pair of lock windows 17, 18 is
They are placed in positions facing each other. The inner lock window 18 has a slit shape with an open bottom end.

The movable rail 21 that is fitted onto the fixed rail 2 is also made of a thick metal plate pressed into the shape shown below, and as shown in FIG. It has a pair of U-shaped portions 23 and 24 that are bent in a U-shape toward the outside on both left and right sides of 22. The bent ends 25.26 of the U-shaped portions 23.24 extend inside the inverted U-shaped portions 4,5.

The bent end portion 25.26 of the U-shaped portion 23.24 and the inverted U-shaped portion 4,
Slide pieces 30 and 31 made of a material with a small coefficient of friction, such as a suitable synthetic resin, are provided between the movable rail 21 and the inner surface of the movable rail 21 to reduce the sliding resistance of the movable rail 21.

Moreover, a rotatable roller 32 is in rolling contact between the movable rail 21 and the fixed rail 2. A plurality of rollers 32 are arranged in the longitudinal direction of the fixed rail 2. The position of the movable rail 21 in the width direction with respect to the fixed rail 2 is regulated by the slide pieces 30 and 31. Fifth
As shown in the figure or FIG. 6, a support member 34 having a cylindrical portion 33 is fixed to the front end (right side in the figure) of the movable rail 21. As shown in FIG.

A bracket 40 is fixed to the upper surface of the movable rail 21 by welding or the like. This bracket 40 is made by pressing a thick metal plate into the following shape. As shown in FIGS. 1 to 3, the bracket 40 includes a flat bracket base 41 that is fixed to the movable rail 21, and a riser for attaching a belt anchor that is provided on one side of the bracket base 41. The wall 42 and the other side of the bracket base 41 are integrally provided with a pair of front and rear lever attachment parts 43 and 44 which are rolled into a cylindrical shape.

A reinforcing rib 45 is provided at a corner portion where the bracket base 41 and the rising wall 42 are connected to each other.

A bolt 47 for fixing the anchor of the buckle portion of the seat belt is attached to a hole 46 as an example of anchor attachment means provided in the rising wall 42. Also,
An auxiliary bracket 50 is fixed to the upper surface side of the bracket base 41 with bolts 51.

A shaft portion 56 of an operating lever 55 is rotatably inserted through the lever mounting portions 43, 44 and the cylindrical portion 33 of the support member 34. An operating portion 57 is provided at one end of the operating lever 55 and is bent into a shape that can be operated by hand.

A locking claw member 60 is fixed to the other end side of the shaft portion 56 of the operating lever 55. This claw member 6° is located between the lever mounting portions 43 and 44. A plurality of lock teeth 61 that can be inserted into and removed from the lock windows 17 and 18 described above are provided at the tip of the claw member 60. This pawl member 60 is connected to the shaft portion 56 between a position where the lock teeth 61 enter the lock window 17.18 (lock position) and a position where the lock teeth 61 are removed from the lock window 17.18 (release position). It is designed so that it can rotate as a unit.

A return spring 62 is wound around the end of the shaft portion 56. This return spring 62 urges the claw member 60 in the locking direction.

An intermediate opening 65 such as a slit is provided in one of the U-shaped portions 23 at a position corresponding to the lock teeth 61 (see FIG. 1).
is provided. Therefore, the lock teeth 61 are connected to the lock window 1.
7.18, it passes through the intermediate opening 65, and thus the lock tooth 61 is supported on both sides. These claw members 60 and operation lever 55
, the locking windows 17, 18, the intermediate opening 65, etc. constitute a locking mechanism 66 for fixing the movable rail 21 in a desired longitudinal position.

A bent edge 70 as an example of a deformation suppressing convex portion and an extruded portion 071 are integrally formed on the base 41 of the bracket 40 on the lower surface side of the bracket 40. An end surface 72 of the bent edge 70 protrudes to a position close to the curved portion 15 of one inverted U-shaped portion 4 . As shown in FIG. 2, the folded edge 70 in the illustrated example
0 in the longitudinal direction.

On the other hand, the top portion 73 of the extruded portion 71 protrudes to a position close to the curved portion 16 of the other inverted U-shaped portion 5 . The extrusion portions 71 in the illustrated example are provided at two locations each having a length L2 in the longitudinal direction of the bracket 40.

Next, the operation of the seat slide device 1 of the above embodiment will be explained.

When the operating portion 57 of the operating lever 55 is rotated in the upward direction, the lock teeth 61 of the claw member 60 engage the lock windows 17 and 18.
The puller moves in the exit direction (release direction) from the intermediate opening 65. Therefore, the movable rail 21 becomes movable in the longitudinal direction with respect to the fixed rail 2. After adjusting the position of the movable rail 21, when you release your hand from the operating section 57, the return spring 6
Bullet 1 of 2 The claw member 60 moves in the locking direction due to the force. This allows the locking tooth 61 to engage with the locking window 17.18 and the intermediate opening 65, so that the movable rail 21 can engage the fixed rail 2.
Fixed.

The load input to the seat belt at the time of a collision is applied in the direction of arrow F in FIG. This load acts through the bracket 40 in a direction that lifts the rear part of the movable rail 21. When this load is large, the inverted U-shaped portion 4.5
．． The U-shape is deformed while being pushed up in the extending direction by the ends 25° 26 of 24, and tends to disengage from the U-shape portions 23, 24.

Thus, a bent edge 70 is opposed above one inverted U-shaped portion 4, and an extruded portion 7 is provided in the other inverted U-shaped portion 5.
1 are facing each other, the bent edge 70 and the protruding portion 71 prevent the inverted U-shaped portion 4.5 from deforming in the above direction. Therefore, even if an excessive belt input is applied, the inverted U-shaped portion 4.5 and the U-shaped portion 23.24 do not come out of engagement, and the required strength is maintained.

2 Moreover, when the claw member 60 is in the locked state, the lock tooth 61
are a pair of lock windows 17.1 provided in the inverted U-shaped portion 4.
8 and the intermediate opening 65 located between these lock windows 17, 18, and thereby the lock teeth 61 are completely supported on both sides. rails 2 and 21 respectively
This locking mechanism 66
can exhibit extremely high strength against loads in the longitudinal direction.

Further, the lever mounting portions 43 and 44 that support the pawl member 60 and the rising wall 42 that supports the belt anchor are integrally provided in one bracket 40, and the lever mounting portions 43 and 44 and the rising wall 42 are mutually connected to each other. There is no interference. Therefore, the size of the bracket 40 can be increased, and great strength can be exhibited despite the small number of parts.

[Effects of the Invention] The seat slide device of the present invention includes a bracket integrally provided with a lever mounting portion 3 and a rising wall for mounting a belt anchor, as well as an inverted U-shaped portion provided on a fixed rail and a movable rail. By adopting a sturdy locking mechanism using a U-shaped portion or the like, great strength can be exhibited, and the required strength in the event of a collision can be fully satisfied, and the weight and number of parts can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view showing the locking mechanism part of the seat slide device, FIG. 2 is a right side view of the bracket, FIG. 3 is a front view of the bracket, and FIG. FIG. 5 is a plan view of the fixed rail, FIG. 5 is a left side view of the seat slide device, and FIG. 6 is a plan view of the seat slide device. 1... Seat slide device, 2... Fixed rail, 4
゜5...Inverted U-shaped part, 11.12... Vertical wall, 17.
18...Lock window, 21...Movable rail, 23.2
4... U-shaped part, 25.26... Bent end, 40...
・Bracket, 42...Rising wall, 43.44...
- Lever attachment means, 46... Anchor attachment means, 60
... Claw member, 61 ... 4 Lock tooth, 6 5 ... Intermediate opening, 6 ... Lock mechanism, 70° 1 ... Deformation prevention convex part.

Claims (1)

[Scope of Claims] A seat slide device comprising a fixed rail fixed to a floor side, a movable rail fitted to the fixed rail so as to be movable in the longitudinal direction, and a bracket fixed to the movable rail. Then, an inverted U-shaped part that is bent in an inverted U-shape facing inward is provided on both sides of the fixed rail along the longitudinal direction of this fixed rail, and a pair of vertical walls of this inverted U-shaped part are provided with mutually connected parts. Opposing lock windows are provided on both sides of the movable rail, and U-shaped portions are provided on both sides of the movable rail that are bent in a U-shape facing outward and whose bent ends enter the inverted U-shaped portion of the fixed rail. This U-shaped part is provided with an intermediate opening at a position corresponding to the lock window, and the bracket is also integrally provided with a rising wall for attaching a seatbelt anchor, and the movable rail is positioned at a desired longitudinal position relative to the fixed rail. A lever mounting part for the locking mechanism is provided for fixing the rail to the inverted U of the fixed rail.
A deformation-preventing convex portion protruding toward the lower surface of the bracket toward the shaped portion is integrally provided, and the locking mechanism is provided with a claw member that can be inserted into both the pair of lock windows and the intermediate opening at the same time. A seat sliding device characterized by: