JP6213149B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device.

2. Description of the Related Art Conventionally, a vehicle seat slide device configured to be able to adjust a vehicle seat position in the front-rear direction of the vehicle is known.
The vehicle seat slide device is arranged in a lower rail corresponding to the first rail, an upper rail corresponding to the second rail movably connected to the lower rail, and a space formed between the lower rail and the upper rail. A locking member.

  Specifically, as shown in FIG. 11, the locking member 120 has a plurality of locking claws 124 protruding in the width direction W on the tip side. Locking claw holes 149 are formed on two surfaces of the upper rail 130 facing the width direction W. With the locking member 120 installed in the upper rail 130, the locking claws 124 protrude from the upper rail 130 in the width direction W through the locking claw holes 149. Therefore, the tip of each locking claw 124 is exposed to the outside of the upper rail 130.

  In addition, the locking member 120 has a rotation shaft portion 128 that protrudes on both sides in the width direction W at substantially the center in the longitudinal direction. The rotary shaft 128 is formed by punching through a press.

  In addition, shaft holes 131 are formed in the side walls 130 a and 130 b facing the width direction W in the upper rail 130. Both rotating shaft portions 128 of the locking member 120 are inserted into the shaft through holes 131. Thereby, the locking member 120 is rotatably supported in the upper rail 130 (see, for example, Patent Document 1).

  In addition, as a support configuration of the locking member 120, there is a configuration in which a support pin is inserted into the side walls 130a and 130b of the upper rail 130 and the locking member 120 (see, for example, Patent Document 2).

JP 2013-52843 A JP 2008-184033 A

In the configurations of Patent Documents 1 and 2, the configuration for rotatably supporting the locking member is complicated.
The present invention has been made in view of such circumstances, and an object thereof is to provide a seat slide device that rotatably supports a locking member with a simpler configuration.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
A seat slide device that solves the above problems includes a first rail that extends in a longitudinal direction, a second rail that is connected to the first rail so as to be relatively movable along the longitudinal direction, and the second rail. The first and second side wall portions that are configured to face the width direction orthogonal to the longitudinal direction and in which the shaft receiving hole is formed, and rotate between the first and second side wall portions. A locking member that is supported and the locking member are configured, and are formed in a curved shape along the longitudinal direction, and an end portion in the width direction is formed in the shaft receiving hole. A rotating shaft portion formed to be rollable, and the locking member, the main body portion extending in the longitudinal direction and formed in a plate shape, and the locking member through the rotating shaft portion Engaging with the first rail according to the rotational position of the Position and and a locking claw to be moved between a spaced release position from said first rail, wherein the rotational shaft portion and the body portion is formed from a single plate material, the rotary shaft portion , Formed by bending from the plate material, formed in a concave shape when viewed from the width direction, and a projecting portion protruding outward in the width direction is formed to be able to roll in the shaft receiving hole. The rotating shaft portion is formed to be able to roll in the shaft receiving hole in a state where the protruding portion is in contact with the inner surface of the shaft receiving hole .

  According to this configuration, the rotation shaft portion is formed in a curved shape along the longitudinal direction. The locking member including the rotating shaft portion can be easily manufactured by bending, for example, from a single plate material. Further, in the seat slide device, the locking member can be rotatably supported in the second rail with a simpler configuration.

For the seat slide device, before a constitutes a Kigakaritome member preferably comprises a shaft shifting portion formed in a convex shape on both sides of the rotation shaft in the longitudinal direction.

  According to this configuration, the rotation shaft portion is formed in a concave shape when viewed from the width direction, and the axis-alignment portion is formed in a convex shape on both sides of the rotation shaft portion in the longitudinal direction. For this reason, a rotating shaft part can be closely approached to the main body side of a locking member through an axis alignment part. Thereby, the rotation locus | trajectory of a locking member can be made small.

For the seat slide device, the rotation shaft and the shaft pulling portion, the Rukoto such formed more curved shape bending out of a plate material is preferred.
In bending, it is necessary to make the curved curved surface at least the minimum radius from the viewpoint of the strength of the processed product. In particular, under the condition regarding the minimum radius, the rotating shaft portion is likely to be spaced apart from the main body portion of the locking member in the height direction. It can be close to the main body side.

  According to the present invention, in the seat slide device, the locking member can be rotatably supported with a simpler configuration.

The perspective view which shows the structure of a seat slide apparatus. The side view of a sheet | seat and a seat slide apparatus. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. (A) is a top view of the locking member, (b) is a side view of the locking member, and (c) is a partially enlarged view of (b). Sectional drawing of a locking member. Sectional drawing of a locking member. (A) is sectional drawing of an upper rail, (b) is sectional drawing of an upper rail at the time of inserting a latching claw in the hole for latching claws. (A) is sectional drawing of an upper rail, (b) is sectional drawing of an upper rail at the time of inserting a rotating shaft part in a shaft accommodation hole. The partial side view of the locking member in other embodiment. The perspective view of the upper rail and locking member in background art.

An embodiment of the present invention will be described with reference to FIGS.
<Outline configuration>
As shown in FIG. 1, the vehicle seat slide device 1 includes a lower rail 30 corresponding to a first rail, an upper rail 40 corresponding to a second rail, a locking member 20, and a spring 50.

  The lower rail 30 extends in the longitudinal direction L and is fixed on the vehicle floor 2. The longitudinal direction L is the same direction as the longitudinal direction of the vehicle. The upper rail 40 is attached to the lower rail 30 so as to be movable relative to the lower rail 30 in the longitudinal direction L.

  The lower rail 30 and the upper rail 40 are arranged in pairs in the width direction W orthogonal to the longitudinal direction L. As shown in FIG. 2, a seat 5 that forms a seating portion for an occupant is fixed on a pair of upper rails 40.

  A release handle 60 is connected between the upper rails 40. The release handle 60 extends operably from the upper rails 40 to the front of the seat 5. When the release handle 60 is pushed in the direction of the vehicle floor 2, the upper rail 40 can move relative to the lower rail 30 together with the seat 5. Hereinafter, the configuration of the vehicle seat slide device 1 will be described in detail.

<Lower rail>
As shown in FIG. 3, the lower rail 30 includes a lower connecting wall portion 32, a pair of lower side wall portions 31, and a pair of lower folded wall portions 33.

  The lower connecting wall 32 is formed in a rectangular plate shape and is fixedly installed on the vehicle floor 2. The lower side wall portion 31 is formed so as to be bent at a substantially right angle from both sides of the lower connecting wall portion 32 in the width direction W. Further, the lower folded wall portion 33 is formed so that the front end side of the lower side wall portion 31 is bent inside the lower rail 30.

  As shown in FIG. 1, a plurality of rectangular lock holes 33 a are formed along the longitudinal direction L at the base ends (upper ends) of the lower folded wall portions 33 of the lower rail 30. These lock holes 33a are formed at regular intervals and open upward in the height direction H (direction perpendicular to the width direction W and the longitudinal direction L).

  As shown in FIG. 4, each lock hole 33 a is formed in a substantially trapezoidal shape in which the hole width Wh <b> 1 decreases as it goes in the direction of the vehicle floor 2 when viewed from the width direction W. That is, the distance between both side surfaces 33 b and 33 c facing the width direction W in the lock hole 33 a is formed to be smaller toward the vehicle floor 2.

  The angles at which the two side surfaces 33b and 33c facing the longitudinal direction L in the lock hole 33a intersect with the height direction H are defined as tooth pressure angles θa1 and θa2. In this example, the tooth pressure angle θa2 is an angle rotated clockwise by a predetermined angle with respect to the height direction H. The tooth pressure angle θa1 is an angle rotated counterclockwise by a predetermined angle with respect to the height direction H.

<Upper rail>
As shown in FIG. 3, the upper rail 40 includes an upper connecting wall portion 45, first and second upper side wall portions 44 a and 44 b, and a pair of upper folding wall portions 46.

  The upper connecting wall 45 is formed in a rectangular plate shape like the lower connecting wall 32. Both the upper side wall portions 44a and 44b are formed so as to be bent substantially at right angles in the direction of the vehicle floor 2 from both sides of the upper connecting wall portion 45 in the width direction W. Further, the upper folding wall portion 46 is formed so that the front end sides of the upper side wall portions 44 a and 44 b are bent to the outside of the upper rail 40.

  In a state where the upper rail 40 is assembled to the lower rail 30, the lower folded wall portion 33 of the lower rail 30 is positioned between the upper side wall portions 44 a and 44 b and the upper folded wall portion 46 in the upper rail 40. In a state in which the upper rail 40 is assembled to the lower rail 30, the upper rail 40 can move along the lower rail 30, and the upper rail 40 is prevented from coming off from the lower rail 30 in a direction away from the lower rail 30.

  As shown in FIG. 1, a plurality (three) of locking claw holes 49 a to 49 c arranged in parallel in the longitudinal direction L are formed in the middle of the longitudinal direction L of the upper rail 40. The intervals between the locking claw holes 49a to 49c are substantially the same as the intervals between the lock holes 33a. The locking claw holes 49a to 49c are formed in a substantially rectangular shape that penetrates in the width direction W, is long in the height direction H, and is slightly curved. Further, the locking claw holes 49 a to 49 c are formed over a range extending from each of the upper side wall portions 44 a and 44 b to a part of the upper connection wall portion 45.

  Further, a plurality (three) of insertion grooves 46a arranged in parallel in the longitudinal direction L are located at positions corresponding to the respective locking claw holes 49a to 49c at the tip (upper end) of each upper folding wall portion 46. Is formed. These insertion grooves 46a are open upward. The fitting groove 46a and the locking claw holes 49a to 49c are arranged at positions that can be matched with a plurality (three) of locking holes 33a adjacent to the lower rail 30.

  Each upper side wall 44a, 44b is formed with a shaft receiving hole 47 opened in the width direction W. The shaft accommodating hole 47 is formed closer to the release handle 60 than the locking claw holes 49a to 49c.

  As shown in FIG. 4, the shaft receiving hole 47 is formed in a substantially trapezoidal shape in which the hole width Wh <b> 2 becomes smaller toward the direction of the vehicle floor 2 in the height direction H. That is, the distance between the side surfaces 47 a and 47 b facing the width direction W in the shaft accommodation hole 47 is formed to be smaller toward the vehicle floor 2.

  The angle at which the two side surfaces 47a and 47b opposed to the longitudinal direction L in the shaft receiving hole 47 with respect to the height direction H intersect is defined as shaft portion pressure angles θb1 and θb2. In this example, the shaft pressure angle θb2 is an angle rotated clockwise by a predetermined angle with respect to the height direction H. The shaft portion pressure angle θb1 is an angle rotated counterclockwise by a predetermined angle with respect to the height direction H. The shaft pressure angles θb1 and θb2 are set larger than the tooth pressure angles θa1 and θa2.

  Further, as shown in FIG. 1, a spring holding hole 48 is formed in a boundary portion between the upper side wall portions 44 a and 44 b and the upper connecting wall portion 45 in the upper rail 40. The spring holding hole 48 is formed closer to the release handle 60 than the shaft receiving hole 47.

  As shown in FIG. 8 (a), the lower right corner in the locking claw hole 49a of the second upper side wall 44b and the upper left corner in the locking claw hole 49a of the first upper side wall 44a The length of the connecting straight line is defined as the nail side allowable length L1. The claw-side allowable length L1 is necessary for inserting locking claws 22aR to 22cR and 22aL to 22cL, which will be described later, into the locking claw hole 49a while rotating the locking member 20 along the longitudinal direction L. Length. The claw-side allowable length L1 of the other locking claw holes 49b and 49c is larger than that of the locking claw hole 49a.

  As shown in FIG. 9A, the length of a straight line connecting the lower right corner of the shaft receiving hole 47 of the second upper side wall 44b and the upper right corner of the shaft receiving hole 47 of the first upper side wall 44a. This is defined as the shaft-side allowable length L2. The claw-side allowable length L1 is a length necessary for inserting the rotating shaft portion 26 described later into the shaft accommodating hole 47 while rotating the locking member 20 along the longitudinal direction L.

<Rolling member>
Further, as shown in FIG. 3, a pair of front and rear rolling members 16 is provided between each upper folding wall portion 46 and the lower side wall portion 31 opposed thereto. The upper rail 40 is supported so as to be slidable in the longitudinal direction L with respect to the lower rail 30 in such a manner that the rolling member 16 rolls between the upper rail 40 and the lower rail 30.

<Locking member>
As shown in FIG. 1, the locking member 20 is installed along the longitudinal direction L in a space formed between the lower rail 30 and the upper rail 40.

  As shown in FIG. 5 (a), the locking member 20 includes a main body portion 21, two sets of locking claws 22aR to 22cR, 22aL to 22cL, a rotating shaft portion 26, a pivoting portion 27, and an input portion. 28 is formed integrally. For example, the locking member 20 is manufactured by pressing a metal plate.

  The main body 21 is formed in a substantially rectangular plate shape extending in the longitudinal direction L. Further, each of the locking claws 22aR to 22cR and 22aL to 22cL is formed at the distal end portion 23 (the end portion opposite to the release handle 60) of the main body portion 21. Specifically, the locking claws 22aR to 22cR and 22aL to 22cL are formed on both side surfaces 29L and 29R extending in the longitudinal direction L at the distal end portion 23 and are formed in a square bar shape protruding in the width direction W. . Three locking claws 22aR to 22cR are formed on one side surface 29R, and three locking claws 22aL to 22cL are formed on the other side surface 29L. The locking claws 22aR to 22cR and 22aL to 22cL are arranged along the longitudinal direction L at the same intervals as the lock holes 33a of the lower rail 30.

  As shown in FIG. 6, when viewed from the longitudinal direction L, the length of the diagonal line formed by the distal end portion 23 and the locking claw 22aL is defined as the claw side maximum rotation length L3. When the claw-side maximum rotation length L3 is equal to or greater than the above-described claw-side allowable length L1, the locking claws 22aR to 22cR and 22aL to 22cL can be inserted into the locking claw holes 49a to 49c. A specific assembling method will be described later.

As shown in FIG. 1, the input unit 28 is formed at the end of the main body 21 opposite to the tip 23.
As shown in FIG. 5 (b), the rotation shaft portion 26 is U-shaped and opens in the height direction H in the figure, and is formed at the approximate center of the locking member 20 in the longitudinal direction L. Further, the shaft-aligning portion 27 is formed in a U-shape that opens downward in the figure in the height direction H, and is formed on both sides of the rotating shaft portion 26 in the longitudinal direction L. That is, the rotation shaft portion 26 is formed in a concave shape, both the shaft alignment portions 27 are formed in a convex shape, and the rotation shaft portion 26 and each shaft alignment portion 27 are connected by a smooth curved surface.

As shown in an enlarged view in FIG. 5 (c), the curvature radii R1 and R2 of the rotary shaft portion 26 and the both-axis alignment portions 27 are set to be at least the minimum radius required from the viewpoint of the strength of the processed product. Has been.
As shown in FIG. 5A, the rotating shaft portion 26 has a protruding portion 26 a that protrudes from the main body portion 21 in the width direction W. As shown in FIG. 4, the lower surface of the projecting portion 26 a is inscribed at two points P 1 and P 2 on both sides in the longitudinal direction L with respect to the two side surfaces 47 a and 47 b of the shaft accommodating hole 47. Therefore, even if there is a variation in assembly between the shaft receiving hole 47 and the rotating shaft portion 26 due to manufacturing variations of the upper rail 40 or the locking member 20, the shaft receiving hole 47 on one side and the rotating shaft portion 26 are in contact with each other. The points P1 and P2 are supported by one point or two points where the shaft receiving hole 47 and the rotating shaft portion 26 on the opposite side come into contact with each other. Therefore, rattling of the locking member 20 in the upper rail 40 can be suppressed.

  As shown in FIG. 7, when the rotation shaft portion 26 is viewed from the longitudinal direction L, a diagonal line having the maximum length in the rotation shaft portion 26 is defined as an axial maximum rotation length L4. When the maximum rotation length L4 is equal to or greater than the above-described shaft-side allowable length L2, the rotation shaft portion 26 can be assembled to the shaft receiving hole 47 as described later. A specific assembling method will be described later.

  As shown in FIG. 4, both rotating shaft portions 26 are inserted into shaft receiving holes 47, respectively. The protruding portions 26 a of both the rotating shaft portions 26 are in contact with both side surfaces 47 a and 47 b facing the longitudinal direction L of the shaft receiving hole 47. For this reason, the protrusion part 26a rolls the both side surfaces 47a and 47b of each accommodation hole 47, so that the locking member 20 can be rotated around the both rotation shaft parts 26 (rotation center O1). With the rotation of the locking member 20, the locking claws 22aR to 22cR and 22aL to 22cL of the locking member 20 are engaged with the locking hole 33a of the lower rail 30 and the release from the locking hole 33a. It can move between positions.

<Spring>
As shown in FIG. 1, the spring 50 is formed by bending one wire rod into a substantially U shape. The spring 50 is a space formed between the lower rail 30 and the upper rail 40 and is located on the upper surface of the locking member 20 (surface on the upper connecting wall 45 side).

  The spring 50 has two holding parts 51, two urging parts 52, two contact parts 53, and two escape parts 54 each. The spring 50 is formed so as to be elastically deformable in a direction in which these parts are separated from each other.

  The holding portion 51 is formed in a substantially U shape that protrudes outward in the width direction W in the middle of the wire extending in the longitudinal direction L. That is, the holding part 51 is formed in a semicircular shape having a certain radius. Each holding portion 51 is inserted into each spring holding hole 48 from the inside of the upper rail 40. As a result, the spring 50 is held in the upper rail 40. 1 shows a state when the spring 50 is held in the upper rail 40. As shown in FIG.

The urging portion 52 is formed on the distal end side of the spring 50 and is an upper surface of the locking member 20 and urges the distal end portion 23 of the locking member 20 in the direction of the vehicle floor 2.
The contact portion 53 is located between the urging portion 52 and the holding portion 51 and is located on the outermost side on the urging portion 52 side of the holding portion 51 in the spring 50. Therefore, when the spring 50 is positioned in the upper rail 40, each contact portion 53 is urged against each upper side wall portion 44a, 44b in the width direction W. This urging force determines the position of the spring 50 in the width direction W. Moreover, the position with respect to the upper surface of the latching member 20 of the urging | biasing part 52 can be made into a desired position because the contact part 53 is set to the position close | similar to latching claw 22aR-22cR, 22aL-22cL.

  The escape portion 54 is formed by bending the wire on both sides of the holding portion 51 in the longitudinal direction L inward in the width direction W. When each holding portion 51 is inserted into each spring holding hole 48 through the escape portion 54, both sides of the holding portion 51 in the spring 50 are suppressed from coming into contact with the peripheral edge portion of each spring holding hole 48. For example, if both sides of the holding portion 51 of the spring 50 abut against the peripheral edge portion of each spring holding hole 48, the postures of the abutting portion 53 and the urging portion 52 may be deviated from the locking member 20. In this respect, by forming the escape portion 54, the contact portion 53 and the biasing portion 52 can be set in desired postures, and accordingly, the biasing force can be appropriately applied to the locking member 20 through the spring 50.

<Operation related to seat position adjustment>
Next, an operation when the position of the sheet 5 is adjusted will be described.
In a state where no operating force is applied to the release handle 60, the locking claws 22aR to 22cR and 22aL to 22cL of the locking member 20 are held in the lock holes 33a of the lower rail 30 through the biasing force from the spring 50. ing. Thereby, the movement of the upper rail 40 with respect to the lower rail 30 is regulated.

  Here, when the release handle 60 is operated to be lifted, the distal end portion 61 of the release handle 60 presses the input portion 28 of the locking member 20 toward the vehicle floor 2. Thereby, the counterclockwise force of FIG. 4 centering on the rotating shaft portion 26 of the locking member 20 is applied to the spring 50 and the locking member 20. When a force exceeding the urging force of the spring 50 to the locking member 20 is input through the input portion 28 of the locking member 20, the locking claws 22aR to 22cR and 22aL to 22cL are separated from the lower rail 30, and the locking claw 22aR. ˜22cR and 22aL˜22cL escape from the lock hole 33a. At this time, the movement of the upper rail 40 with respect to the lower rail 30 is allowed. Therefore, the position of the seat 5 in the vehicle front-rear direction can be adjusted.

<Operation Related to Assembly of Locking Member 20 to Upper Rail 40>
In order to assemble the locking member 20 to the upper rail 40, the locking claws 22aR to 22cR and 22aL to 22cL are inserted into the locking claw holes 49a to 49c, and the rotary shaft portions 26 are inserted into the shaft receiving holes 47. It is necessary to insert. These insertions are performed simultaneously.

Here, first, the operation when the respective locking claws 22aR to 22cR and 22aL to 22cL are inserted into the respective locking claw holes 49a to 49c will be described.
As shown in FIG. 8B, first, the respective locking claws 22aR to 22cR on one side are inserted into the respective locking claw holes 49a of the first upper side wall portion 44a from the inside of the upper rail 40. At this time, the locking member 20 is inclined in the upper rail 40. When the insertion is completed, the engaging claws 22aL to 22cL on the other side are inserted into the respective engaging claw holes 49a of the second upper side wall portion 44b as shown by arrows in FIG. The stop member 20 is rotated clockwise in the drawing with each of the locking claws 22aR to 22cR on one side as fulcrums. At this time, the claw-side allowable length L1 is set to be larger than the claw-side maximum rotation length L3, so that the other-side locking claws 22aL to 22cL become the locking claw holes 49a in the second upper side wall 44b. This prevents the latching claws 22aL to 22cL from being inserted into the latching claw holes 49a by being in contact with the lower edge portion of the bracket. Therefore, the other side locking claws 22aL to 22cL can be inserted into the locking claw holes 49a in the second upper side wall portion 44b.

  For example, when the claw-side allowable length L1 is equal to or less than the claw-side maximum rotation length L3, when the locking member 20 is rotated clockwise in the figure, the tips of the other locking claws 22aL to 22cL The second upper side wall portion 44b contacts the lower edge portion of the locking claw hole 49a. Therefore, the locking member 20 cannot be assembled to the upper rail 40.

Next, an operation when each rotating shaft portion 26 is inserted into each shaft receiving hole 47 will be described.
As shown in FIG. 9B, first, the rotation shaft portion 26 on one side is inserted into the shaft accommodating hole 47 of the first upper side wall portion 44a from the inside of the upper rail 40. At this time, the locking member 20 is inclined in the upper rail 40. When the insertion is completed, as shown by the arrow in FIG. 9 (b), the locking member 20 is moved to the other side so that the rotation shaft portion 26 on the other side is inserted into the shaft receiving hole 47 of the second upper side wall portion 44b. The rotation shaft 26 on the side is rotated in the clockwise direction in the figure with the fulcrum as a fulcrum.

  At this time, the shaft-side allowable length L2 is set to be larger than the shaft-side maximum rotation length L4, so that the other-side rotation shaft portion 26 has a lower edge portion of the shaft accommodation hole 47 in the second upper side wall portion 44b. This prevents the rotation shaft portion 26 from being prevented from being inserted into the shaft accommodation hole 47 by being in contact therewith. Therefore, the rotation shaft portion 26 on the other side can be inserted into the shaft accommodation hole 47 in the second upper side wall portion 44b.

  For example, when the shaft-side allowable length L2 is equal to or less than the shaft-side maximum rotation length L4, when the locking member 20 is rotated clockwise in the drawing, the other-side rotation shaft portion 26 is It contacts the lower edge of the shaft accommodating hole 47 in the upper side wall 44b. Therefore, the locking member 20 cannot be assembled to the upper rail 40.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) The rotating shaft portion 26 is formed in a curved shape along the longitudinal direction L. The locking member 20 including the rotating shaft portion 26 can be easily manufactured by bending, for example, from a single plate material. Further, the locking member 20 can be rotatably supported on the upper rail 40 with a simpler configuration.

  Furthermore, since both the rotating shaft parts 26 can be formed simultaneously, the coaxiality of both the rotating shaft parts 26 can be improved compared with the structure which provided the both rotating shaft parts separately. For this reason, the locking member 20 rotates smoothly.

  (2) The rotation shaft portion 26 is formed in a concave shape when viewed in the width direction W, and the shaft alignment portion 27 is formed in a convex shape on both sides of the rotation shaft portion 26 in the longitudinal direction. For this reason, the rotation shaft portion 26 can be brought closer to the main body portion 21 side of the locking member 20 through the shaft alignment portion 27. Thereby, the rotation locus | trajectory of the locking member 20 can be made small. For this reason, the space between the upper rail 40 and the lower rail 30 required for the rotation of the locking member 20 can be reduced. Therefore, the seat slide device 1 can be configured more compactly.

  (3) The radii of curvature R1 and R2 of the rotating shaft portion 26 and the both shaft-aligning portions 27 are set to be at least the minimum radius required from the viewpoint of the strength of the processed product. Under the condition of the minimum radius or more, as shown in FIG. 10, the rotation shaft portion 26, and hence the rotation center O <b> 1 of the locking member 20, is located away from the main body portion 21 of the locking member 20 in the height direction H. Although it is easy, as described above, the rotation shaft portion 26 can be brought close to the main body portion 21 of the locking member 20 through the shaft alignment portion 27.

  (4) When the locking member 20 is assembled to the upper rail 40, the rotary shaft portion 26 on one side is inserted into the shaft receiving hole 47 of the first upper side wall portion 44a from the inside of the upper rail 40. After the insertion, the locking member 20 is rotated so that the rotation shaft portion 26 on the other side is inserted into the shaft accommodation hole 47 of the second upper side wall portion 44b. At this time, the shaft-side allowable length L2 is set to be larger than the shaft-side maximum rotation length L4, so that the rotation shaft portion 26 on the other side is located at the edge of the shaft accommodation hole 47 in the second upper side wall portion 44b. It is suppressed that the insertion of the rotating shaft part 26 is prevented by contact. Therefore, the rotation shaft portion 26 on the other side can be inserted into the shaft accommodation hole 47 in the second upper side wall portion 44b. For this reason, the locking member 20 can be easily assembled to the upper rail 40.

  (5) In the shaft accommodating hole 47, the distance between the two side surfaces 47a and 47b in contact with the rotating shaft portion 26 becomes smaller toward the vehicle floor 2 in the height direction H. According to this configuration, both curved surfaces 26 b of the rotating shaft portion 26 are inscribed at two points P 1 and P 2 on both sides in the longitudinal direction L with respect to the two side surfaces 47 a and 47 b of the shaft receiving hole 47. Therefore, even if there is a variation in assembly between the shaft receiving hole 47 and the rotating shaft portion 26 due to manufacturing variations of the upper rail 40 or the locking member 20, the shaft receiving hole 47 on one side and the rotating shaft portion 26 are in contact with each other. The points P1 and P2 are supported by one point or two points where the shaft receiving hole 47 and the rotating shaft portion 26 on the opposite side come into contact. Therefore, rattling of the locking member 20 in the upper rail 40 can be suppressed.

  (6) When the locking member 20 is assembled to the upper rail 40, the locking claws 22aR to 22cR on one side are inserted into the locking claw holes 49a to 49c of the first upper side wall portion 44a from the inside of the upper rail 40. Go. After the insertion, the locking member 20 is rotated so that the other locking claws 22aL to 22cL are inserted into the locking claw holes 49a to 49c of the second upper side wall portion 44b. At this time, the claw-side allowable length L1 is set to be larger than the claw-side maximum rotation length L3, so that the other-side locking claws 22aL to 22cL become the locking claw holes 49a in the second upper side wall 44b. It is suppressed that insertion of latching claw 22aL-22cL is prevented by contacting the edge part of -49c. Therefore, the other side locking claws 22aL to 22cL can be inserted into the locking claw holes 49a to 49c in the second upper side wall portion 44b. For this reason, the locking member 20 can be easily assembled to the upper rail 40.

  (7) The shaft pressure angles θb1 and θb2 are set larger than the tooth pressure angles θa1 and θa2. Here, as the pressure angles θa1, θa2, θb1, and θb2 of the side surfaces 33b, 33c, 47a, and 47b are larger, the locking claws 22aR to 22cR and 22aL to 22cL or the rotation shaft portion 26 are moved to the side surfaces 33b, 33c, 47a, and 47b. The applied force increases, and accordingly, the reaction force applied to the locking claws 22aR to 22cR, 22aL to 22cL or the rotating shaft portion 26 also increases. For this reason, for example, even when an impact is applied to the locking member 20, the reaction force applied to the rotating shaft portion 26 is applied to the locking claws 22aR to 22cR and 22aL to 22cL by setting the pressure angle to the above relationship. It becomes larger than the reaction force applied. Therefore, when an impact is applied, the locking claws 22aR to 22cR and 22aL to 22cL can be held in the lock hole 33a by allowing the rotary shaft portion 26 to escape from the shaft housing hole 47 first. Thereby, it is suppressed that the latching claws 22aR to 22cR and 22aL to 22cL unintentionally escape from the lock hole 33a and the lower rail 30 can move relative to the upper rail 40.

  (8) The tooth pressure angles θa1 and θa2 on the two side surfaces 33b and 33c of the lock hole 33a are set to be the same, and the shaft pressure angles θb1 and θb2 on the two side surfaces 47a and 47b of the shaft receiving hole 47 are the same. Is set to Thereby, the shape of the lock hole 33a and the shaft accommodation hole 47 in the longitudinal direction L is symmetric. Therefore, formation of the lock hole 33a and the shaft accommodation hole 47 becomes easy.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the lower rail 30 is fixed to the vehicle floor 2, and the upper rail 40 is configured to be movable relative to the lower rail 30. However, the upper rail 40 and the lower rail 30 may be reversed.

-You may apply the vehicle seat slide apparatus 1 in the said embodiment other than a vehicle.
-The number of the latching claws 22aR-22cR, 22aL-22cL, and the latching claw holes 49a-49c of the latching member 20 in the said embodiment can be changed suitably.

  In the above-described embodiment, the shaft alignment portions 27 are formed on both sides of the rotating shaft portion 26. However, as shown in FIG. 10, the both shaft alignment portions 27 may be omitted. Even in this case, the locking member 20 can be configured simply from a single plate.

In the above embodiment, the shaft receiving hole 47 is formed in a substantially trapezoidal shape, but may be formed in a circular shape.
-The locking member 20 in the said embodiment may be manufactured using casting. In this case, unlike the bending process, there is no condition equal to or greater than the minimum radius. Therefore, the rotating shaft portion 26 can be provided in the vicinity of the main body portion 21 while omitting the both-axis aligned portions 27.

Next, the technical idea that can be grasped from the embodiment will be described together with the effects.
(A) One end portion in the height direction orthogonal to the longitudinal direction and the width direction in the shaft receiving hole of the first side wall portion, and the other in the height direction in the shaft receiving hole of the second side wall portion. The length of the imaginary straight line connecting the end portions is the shaft side allowable length, and the rotation formed on one side surface and the other side surface of the two side surfaces where the rotation shaft portion is formed in the main body portion. A seat slide device in which a length of an imaginary straight line connecting the tip of the shaft portion is defined as a shaft-side maximum rotation length, and the shaft-side allowable length is set larger than the shaft-side maximum rotation length.

  In assembling the locking member to the second rail, the rotation shaft portion on one side is inserted into the shaft receiving hole of the first side wall portion from the inside of the second rail. After the insertion, the locking member is rotated so that the other rotating shaft portion is inserted into the shaft receiving hole of the second side wall portion. At this time, the shaft-side allowable length is set to be larger than the shaft-side maximum rotation length, so that the rotation shaft portion on the other side comes into contact with the edge of the shaft receiving hole in the second side wall portion and the rotation shaft portion It is suppressed that insertion is prevented. Therefore, the rotation shaft portion on the other side can be inserted into the shaft accommodating hole in the second side wall portion. For this reason, the locking member can be easily assembled to the second rail.

(B) The locking claw extends from the both side surfaces extending in the longitudinal direction of the main body of the locking member to the outside of the second rail through the locking claw hole,
One end portion in the height direction orthogonal to the longitudinal direction and the width direction in the locking claw hole in the first side wall portion and the other end in the height direction in the locking claw hole in the second side wall portion. The length of the imaginary straight line connecting the parts is the nail side allowable length,
The length of a virtual straight line connecting one side surface of the both side surfaces of the locking member main body and the tip of the locking claw formed on the other side surface is the claw side maximum rotation length, A seat slide device in which a claw side allowable length is set larger than the claw side maximum rotation length.

  When the locking member is assembled to the second rail, the locking claw on one side is inserted into the locking claw hole in the first side wall portion from the inside of the second rail. After the insertion, the locking member is rotated so that the locking claw on the other side is inserted into the locking claw hole in the second side wall portion. At this time, the claw-side allowable length is set to be larger than the claw-side maximum rotation length, so that the other side locking claw comes into contact with the edge of the locking claw hole in the second side wall and is locked. Preventing the insertion of the nail is suppressed. Therefore, the other side locking claw can be inserted into the locking claw hole in the second side wall portion. For this reason, the locking member can be easily assembled to the second rail.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle seat slide apparatus, 2 ... Vehicle floor, 5 ... Seat, 16 ... Rolling member, 20 ... Locking member, 21 ... Main-body part, 22aL-22cL, 22aR-22cR ... Locking claw, 23 ... Tip part 26 ... Rotating shaft part, 26a ... Projection part, 28 ... Input part, 30 ... Lower rail, 31 ... Lower side wall part, 32 ... Lower connecting wall part, 33 ... Lower folded wall part, 33a ... Lock hole, 40 ... Upper rail, 44a ... first upper side wall portion, 44b ... second upper side wall portion, 45 ... upper connecting wall portion, 46 ... upper folding wall portion, 46a ... insertion groove, 47 ... shaft receiving hole, 48 ... spring holding hole, 49a ˜49c: hole for locking claw, 50: spring, 51: holding portion, 52: biasing portion, 53: abutting portion, 54: escape portion, 60: release handle.

Claims (3)

A first rail extending in the longitudinal direction;
A second rail coupled to the first rail so as to be relatively movable along the longitudinal direction;
First and second side wall portions that constitute the second rail and face the width direction orthogonal to the longitudinal direction, and in which a shaft receiving hole is formed,
A locking member rotatably supported between the first and second side wall portions;
A rotating shaft portion that constitutes the locking member and is formed in a curved shape along the longitudinal direction, and an end portion in the width direction is formed to be able to roll in the shaft receiving hole. When,
A main body portion that constitutes the locking member and extends in the longitudinal direction and is formed in a plate shape;
A locking claw that moves between a locking position locked to the first rail and a release position spaced apart from the first rail in accordance with a rotation position of the locking member through the rotating shaft. Prepared ,
The rotating shaft portion and the main body portion are formed from a single plate material,
The rotating shaft portion is formed by bending from the plate material, is formed in a concave shape when viewed from the width direction, and is formed so that a protruding portion protruding outward in the width direction can roll in the shaft receiving hole. Having as an end in the width direction,
The rotary shaft portion is a seat slide device that is formed so as to be able to roll in the shaft receiving hole in a state in which the protruding portion is in contact with an inner surface of the shaft receiving hole . The seat slide device according to claim 1,
It is those constituting the front Kigakaritome member, seat slide device provided with a shaft shifting portion formed in a convex shape on both sides of the rotation shaft in the longitudinal direction. The seat slide device according to claim 2,
The rotation shaft and the shaft pulling portion, the Ru seat slide device name is formed more curved shape bending from a single plate material.