JP6094454B2 - 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.
A vehicle seat slide device is arranged in a lower rail corresponding to a first rail, an upper rail corresponding to a second rail mounted movably on the lower rail, and a space formed between the lower rail and the upper rail. A locking member.

  Specifically, as shown in FIG. 10, 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 and can be fitted to the lower rail (not shown). The locking member 120 has a substantially columnar rotating shaft 128.

  The upper rail 130 is configured by combining a first member 130a and a second member 130b in the width direction W. When the locking member 120 is assembled to the upper rail 130, the locking member 120 is installed between the first member 130a and the second member 130b with the first member 130a and the second member 130b spaced apart in the width direction W. Then, by bringing the first member 130 a and the second member 130 b closer, each locking claw 124 passes through the locking claw hole 149 of the upper rail 130. The rotating shaft 128 of the locking member 120 also passes through the shaft through hole 131 formed in both members 130a and 130b.

  In this way, by configuring the upper rail 130 so as to be split in the width direction W, the locking member 120 can be assembled to the upper rail 130 regardless of the length of the locking claws 124 and the rotating shaft 128 in the width direction W. (For example, refer to Patent Document 1).

JP 2013-52843 A

  In the configuration of FIG. 10 described above, when the locking member 120 is assembled to the upper rail 130, it is necessary to assemble the members 130a and 130b with the locking member 120 installed between the first and second members 130a and 130b. The assembly of the locking member 120 to the upper rail 130 was not easy.

  The present invention has been made in view of such circumstances, and an object of the invention is to provide a seat slide device in which a locking member can be easily assembled to a second rail.

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, which face each other in the width direction orthogonal to the longitudinal direction and in which a hole for a locking claw is formed, are formed between the first and second side wall portions. A locking member that is rotatably supported, and constitutes the locking member, from the both side surfaces extending in the longitudinal direction in the main body portion of the locking member through the locking claw hole. A mechanism that extends to the outside of the second rail and moves between a locking position locked to the first rail and a release position spaced apart from the first rail according to the rotation position of the locking member. A pawl and the locking member, wherein both A rotation shaft portion that is formed on a surface and is rotatably inserted into a shaft housing hole formed in the first and second side wall portions, and the shaft housing hole in the first side wall portion A length of a virtual straight line connecting one end portion in the height direction orthogonal to the longitudinal direction and the width direction in the shaft and the other end portion in the height direction in the shaft receiving hole of the second side wall portion. The length of a virtual straight line connecting one side surface of the both side surfaces where the rotation shaft portion is formed and the tip end of the rotation shaft portion formed on the other side surface is defined as a side allowable length. As the rotation length, the shaft-side allowable length is set to be 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.

  About the said seat slide apparatus, the one end part of the said height direction in the hole for latching claws of the said 1st side wall part and the other end part of the said height direction in the hole for latching claw of the said 2nd side wall part are made. An imaginary straight line to be connected is defined as a claw-side allowable length, and one side of the both side surfaces of the main body of the locking member is connected to the tip of the locking claw formed on the other side. It is preferable that the length of the straight line is the claw side maximum rotation length, and the 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.

  In the seat slide device, the two rotary shaft portions are formed so as to be bent with respect to the main body portion so as to face each other in the width direction, and a tip surface of the rotary shaft portion forms the shaft receiving hole. It is preferable that at least a part is formed in a curved shape so as to be able to roll along.

  According to this configuration, the rotating shaft portions are formed so as to be bent with respect to the main body portion of the locking member in such a manner that they face each other in the width direction. Further, at least a part of the tip surface is formed in a curved shape so that the tip surface of the rotating shaft portion can roll along the peripheral surface of the shaft receiving hole. The rotary shaft portion can be formed by pressing from a plate material integral with the main body portion of the locking member. Therefore, the locking member having the rotating shaft portion can be easily manufactured.

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 structure is configured to face in the width direction orthogonal to the longitudinal direction, and have two side wall portions in which a locking claw hole is formed, and a support that is rotatably supported between the two side wall portions. A locking member and the locking member, which extends from the both side surfaces of the locking member main body extending in the longitudinal direction to the outside of the second rail through the locking claw hole. And a locking claw that moves between a locking position locked to the first rail and a release position spaced apart from the first rail according to the rotation position of the locking member, locking pawl hole of the side wall portions, of the first rail side Part takes the closed shape, the locking member in a state in which the locking pawl piece side on an end portion opposite the first rail is pressed against the locking pawl in the bore of the other of said side wall portion Is formed in a size that allows the locking claw on the opposite side to enter when rotated about the longitudinal direction.

According to this configuration, when the locking member is assembled to the second rail, the locking claw on one side is inserted into the locking claw hole on the other 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 on the one side wall. Thereby, the other side locking claw can be inserted into the locking claw hole in the one side wall portion. For this reason, the locking member can be easily assembled to the second rail.
About the said seat slide apparatus, the one end part of the said height direction in the hole for latching claws of the said 1st side wall part and the other end part of the said height direction in the hole for latching claw of the said 2nd side wall part are made. An imaginary straight line to be connected is defined as a claw-side allowable length, and one side of the both side surfaces of the main body of the locking member is connected to the tip of the locking claw formed on the other side. It is preferable that the length of the straight line is the claw side maximum rotation length, and the claw side allowable length is set larger than the claw side maximum rotation length.

  According to the present invention, in the seat slide device, the locking member can be easily assembled to the second rail.

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. The top view of a locking member. Sectional drawing of CC of FIG. Sectional drawing of DD of FIG. (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 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 locking 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, the locking member 20 includes a body portion 21, two sets of locking claws 22 a R to 22 c R, 22 a L to 22 c L, a rotating shaft portion 26, and an input portion 28 that are integrally formed. Become. 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. 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, the length of the diagonal line formed by the distal end portion 23 and the locking claws 22aL to 22cL when viewed from the longitudinal direction L is defined as the claw side maximum rotation length L3. In this example, the claw side maximum rotation length L3 is the length of a diagonal line connecting the lower left corner of the tip 23 in the figure and the upper right corner of the locking claw 22a. When the claw-side maximum rotation length L3 is larger 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. The input unit 28 is formed at the end of the main body 21 opposite to the tip 23.

  As shown in FIG. 1, the rotation shaft portion 26 of the locking member 20 is curved in the direction of the vehicle floor 2 with respect to the main body portion 21 of the locking member 20 so that the front end surface 26 a is along the longitudinal direction L. Formed. Both rotary shaft portions 26 face each other in the width direction W.

  As shown in FIG. 4, the distal end surface 26 a of the rotating shaft portion 26 is formed as a curved surface 26 b at both ends in the longitudinal direction L, and a flat surface 26 c extending between the curved surfaces 26 b in the longitudinal direction L. As shown by a two-dot chain line in FIG. 4, both the curved surfaces 26 b are formed along the same circular arc drawn around the rotation center O <b> 1 of the locking member 20. A flat surface 26c is formed so that a part of the arc on the vehicle floor 2 side is removed.

  Both curved surfaces 26b of the rotating shaft portion 26 are inscribed at two points P1 and P2 on both sides in the longitudinal direction L with respect to the two side surfaces 47a and 47b 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.

  As shown in FIG. 7, when viewed from the longitudinal direction L, the maximum straight line length among the straight lines connecting the vertices of the outer shape formed by the main body portion 21 and the one rotation shaft portion 26 is defined as an axial maximum rotation length L4. Stipulate. In this example, the shaft-side maximum rotation length L4 is a length connecting the lower left corner of one rotation shaft portion 26 and the upper right corner of the main body 21.

  When the maximum rotation length L4 is larger than the shaft-side allowable length L2 described above, the rotation shaft portion 26 can be assembled to the shaft receiving hole 47 as will be 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 distal end surfaces 26 a (particularly both curved surfaces 26 b) of both 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, each curved surface 26b rolls on both side surfaces 47a and 47b of each shaft accommodation hole 47, so that the locking member 20 can be rotated around both rotation shaft portions 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) When the locking member 20 is assembled to the upper rail 40, the one rotation shaft portion 26 is inserted into the shaft accommodating 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.

  (2) 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.

  (3) The rotating shaft portion 26 is formed to be curved with respect to the main body portion 21 of the locking member 20 so that the distal end surface 26a thereof is along the longitudinal direction L. In addition, curved surfaces 26 b are formed at both ends in the longitudinal direction L of the distal end surface 26 a so that the distal end surface 26 a of the rotation shaft portion 26 can roll along the peripheral surface of the shaft accommodating hole 47. The rotating shaft portion 26 can be formed by pressing from a plate material integral with the main body portion 21 of the locking member 20. Therefore, the locking member 20 having the rotating shaft portion 26 can be easily manufactured.

  (4) Since the front end side of the rotation shaft portion 26 is removed along the longitudinal direction L, the shaft-side maximum rotation length L4 can be reduced. Therefore, the shaft-side allowable length L2, which is a condition for inserting the rotating shaft portion 26 into the shaft receiving hole 47, can be easily set larger than the shaft-side maximum rotation length L4.

  Further, the function as the rotation axis is realized through the two curved surfaces 26 b in the rotation shaft portion 26. In this configuration, a simpler configuration can be realized while functioning in the same manner as the columnar rotation axis drawn around the rotation center O1 indicated by the two-dot chain line in FIG.

  (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) 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.

  (7) 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.

  (8) The locking member 20 is in a state where the locking claws 22aR to 22cR on one side are pressed against the upper end of FIG. 8B in the locking claw hole 49a of the first upper side wall 44a. When rotated in the clockwise direction with the longitudinal direction L as the rotation axis, the locking claw hole 49a of the second upper side wall portion 44b is formed to a size that allows the other locking claw 22aL to 22cL to enter. . The locking claw hole 49a of the first upper side wall 44a is also formed from the same viewpoint. With this configuration, the locking member 20 can be easily assembled to the upper rail 40.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
-In the above-mentioned embodiment, although both the rotating shaft parts 26 were curved and formed with respect to the main-body part 21, you may form the rotating shaft part 26 in the column shape extended in the width direction W, for example. . In this case, the shaft receiving hole is also formed in a columnar shape corresponding to the tip portion 23.

  In the embodiment described above, the rotating shaft portion 26 of the locking member 20 is inserted into the shaft receiving hole 47 of the upper rail 40 in the manner shown in FIG. 9B, but the rotating shaft portion 26 is not attached to the upper rail 40. You may press-fit in the shaft accommodation hole 47. FIG. Specifically, an external force is applied to both rotary shaft portions 26 in a manner that causes both rotary shaft portions 26 to approach each other. With this external force, the locking member 20 is compressed in the width direction W and inserted into the upper rail 40. Thereby, the rotating shaft part 26 can be inserted into the shaft accommodating hole 47 of the upper rail 40. The rotation shaft portion 26 has a shape that is easily bent in the width direction W as compared with the columnar rotation shaft portion in the background art. For this reason, the rotating shaft part 26 can be easily inserted into the shaft accommodating hole 47 of the upper rail 40 through this press-fitting.

  In the above embodiment, the rotating shaft portion 26 is formed to be curved in the direction of the vehicle floor 2 with respect to the main body portion 21 of the locking member 20 so that the front end surface 26a thereof is along the longitudinal direction L. However, the rotating shaft portion 26 may be bent at a substantially right angle with respect to the main body portion 21.

  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.

Next, the technical idea that can be grasped from the embodiment will be described together with the effects.
(A) The locking claw hole is a seat slide device that penetrates in the width direction in each of the side wall portions and does not penetrate in the height direction.

  According to this configuration, since the locking claw hole does not penetrate in the height direction, the locking claw is held in the locking claw hole after the locking member is assembled to the second rail. Therefore, it is suppressed that a locking member remove | deviates from a 2nd rail.

  (B) The seat slide device in which the distance between the two side surfaces of the shaft accommodation hole in contact with the two curved surfaces of the rotating shaft portion is set to be smaller toward the first rail side in the height direction.

  According to this configuration, the distance between the two side surfaces of the shaft accommodation hole is set to be smaller toward the first rail side in the height direction. On the two side surfaces of the shaft accommodation hole, the rotation shaft portion can be inscribed at two points on both sides in the longitudinal direction. Therefore, even if there is a variation in assembly between the shaft receiving hole and the rotating shaft due to manufacturing variations of the second rail or the locking member, the opposite of the two points where the shaft receiving hole and the rotating shaft on one side abut. It is supported at one point or two points where the side shaft housing hole and the rotating shaft portion come into contact. Therefore, rattling of the locking member in the second rail can be suppressed.

  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 ... Tip surface, 26b ... Curved surface, 26c ... Plane, 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, 44b ... Second upper side wall, 45 ... Upper connecting wall, 46 ... Upper folded wall, 46a ... Insertion groove, 47 ... Shaft receiving hole 48 ... Spring holding holes, 49a to 49c ... Locking claw holes, 50 ... Spring, 51 ... Holding part, 52 ... Biasing part, 53 ... Abutting part, 54 ... Relief part, 60 ... Release handle.

Claims (5)

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, facing the width direction orthogonal to the longitudinal direction, and having a hole for a locking claw,
A locking member rotatably supported between the first and second side wall portions;
The locking member is configured to extend from the both side surfaces extending in the longitudinal direction of the locking member in the longitudinal direction to the outside of the second rail through the locking claw hole, and A locking claw that moves between a locking position locked to the first rail and a release position spaced from the first rail in accordance with a rotation position of the locking member;
A rotating shaft portion that constitutes the locking member, is formed on the both side surfaces, and is rotatably inserted into shaft receiving holes formed in the first and second side wall portions, With
One end portion in the height direction perpendicular to the longitudinal direction and the width direction in the shaft accommodation hole of the first side wall portion, and the other end portion in the height direction in the shaft accommodation hole of the second side wall portion The length of the imaginary straight line that connects
The length of a virtual straight line connecting one side surface of the both side surfaces on which the rotation shaft portion is formed and the tip of the rotation shaft portion formed on the other side surface is defined as an axial maximum rotation length,
A seat slide device in which the shaft-side allowable length is set to be larger than the shaft-side maximum rotation length. The seat slide device according to claim 1,
An imaginary straight line connecting one end in the height direction of the locking claw hole in the first side wall and the other end in the height direction in the locking claw hole in the second side wall. Let the length be 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. The seat slide device according to claim 2,
The two rotating shaft portions are formed so as to be bent with respect to the main body portion so as to face each other in the width direction, and the tip surfaces thereof can roll along side surfaces forming the shaft receiving holes. A seat slide device in which at least a part is formed in a curved surface. 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;
Two side walls that constitute the second rail and face the width direction orthogonal to the longitudinal direction and in which a hole for a locking claw is formed;
A locking member rotatably supported between the two side wall parts;
The locking member is configured to extend from the both side surfaces extending in the longitudinal direction of the locking member in the longitudinal direction to the outside of the second rail through the locking claw hole, and A locking claw that moves between a locking position locked to the first rail and a release position spaced apart from the first rail according to the rotation position of the locking member,
One side wall portion of the locking claw hole has a closed end on the first rail side, and the other side wall portion of the locking claw hole has an end opposite to the first rail. when the locking member in a state in which the locking pawl piece side is pressed against the part is rotated the longitudinal direction rotation axis, the locking pawl on the opposite side is formed in a size capable of entering Seat slide device.   The seat slide device according to claim 4,
  An imaginary straight line connecting one end in the height direction of the locking claw hole in the first side wall and the other end in the height direction in the locking claw hole in the second side wall. Let the length be 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.