JP6094557B2 - 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. 15, 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.
The seat slide device according to claim 1, a first rail, a second rail connected to the first rail so as to be relatively movable along a longitudinal direction of the first rail, and the second rail The second rail has first and second side wall portions facing in the width direction perpendicular to the longitudinal direction of the second rail, and A shaft receiving hole into which a part of the locking member is inserted is formed in the first and second side wall portions, and the locking member extends in a longitudinal direction of the main body portion and the main body portion. And a second side surface and a side surface extending from the main body portion along the width direction when viewed from the thickness direction of the main body portion, and a tip portion of the second side surface rolls along the side surface forming the shaft receiving hole. A rotating shaft portion at least partially formed in a curved shape, and the rotating shaft portion And a locking pawl to move between the spaced release position from the first rail a locking position engaged with the first rail in accordance with the rotational position of the locking member that.

  According to this configuration, the rotation shaft portion is formed to extend from the main body portion to both sides along the width direction. In addition, at least a part of the distal end surface is formed in a curved shape so that the distal end portion of the rotation shaft portion can roll along the side surface of the shaft accommodating hole. This rotating shaft part can be formed, for example, by pressing from a plate material integral with the main body part of the locking member. Therefore, the locking member can be easily manufactured. Further, in the seat slide device, the locking member can be rotatably supported with a simpler configuration.

Further, the seat slide device according to claim 1, of the first of said in said shaft receiving hole of the side wall portion longitudinally and one end and the second side wall portion in the height direction orthogonal to the width direction The length of a virtual straight line connecting the other end portion in the height direction in the shaft receiving hole is defined as a shaft-side allowable length, and one of the two side surfaces on which the rotating shaft portion is formed in the main body portion. When, virtual axis side maximum rotation length the length of the straight Satoshi, set the axis side allowable length greater than the axial side maximum rotation length connecting the distal end of the rotary shaft portion formed on the other side ing.

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.
In the seat slide device according to claim 2, the rotation shaft portion is formed to be bent with respect to the main body portion of the locking member so as to face the width direction.
According to this configuration, the rotation shaft portion can be shaped to be easily bent in the width direction. For this reason, a rotating shaft part can be easily press-fitted in the shaft accommodation hole of a 2nd rail.
Further, in the seat slide device according to claim 3, the rotation shaft portion has the main body portion at the same height as the main body portion from the main body portion along the width direction when viewed from the thickness direction of the main body portion. Extending at both sides of the main body so as to be coplanar with the plane extending in the width direction, and at least part of the main body is curved so that the tip can roll along the side surface forming the receiving hole. Is formed.

  With respect to the seat slide device, the front end surface of the rotation shaft portion includes a flat surface portion in which the front end side of the rotation shaft portion protruding in the height direction is removed along the longitudinal direction, and the flat surface portion in the longitudinal direction. It is preferable to have two curved surface portions that are formed on both sides and that are positioned on the same virtual arc as viewed from the width direction and that come into contact with the side surface of the shaft receiving hole facing the longitudinal direction so as to be able to roll. .

  According to this configuration, the shaft-side maximum rotation length can be reduced by forming the planar portion removed along the longitudinal direction on the distal end side of the rotation shaft portion. Therefore, it becomes easy to set the shaft-side allowable length, which is a condition for inserting the rotating shaft portion into the shaft receiving hole, to be larger than the shaft-side maximum rotation length.

  About the said seat slide apparatus, it is preferable that the distance between the two side surfaces in the said shaft accommodation hole which contact | connects the two curved-surface parts of the said rotating shaft part is set so small that it goes to the said 1st rail side in the said 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. For this reason, the rotating shaft can be inscribed at two points on both sides in the longitudinal direction on the two side surfaces of the shaft receiving hole. 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. The locking member is supported by the second rail at one 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.

  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 the seat slide apparatus in 1st Embodiment. The side view of the sheet | seat which mounted | wore the seat slide apparatus of FIG. 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 which shows the structure of the seat slide apparatus in 2nd Embodiment. (A) The top view of the locking member shown in FIG. 10, (b) The side view of the locking member shown in FIG. 10, (c) The bottom view of the locking member shown in FIG. (A) The upper surface side perspective view which looked at the locking member shown in FIG. 10 from diagonally upward, (b) The lower surface side perspective view which looked at the locking member shown in FIG. 11 from diagonally upward. The elements on larger scale of the rotating shaft part shown in FIG.12 (b). (A) Top view of the spring shown in FIG. 10, (b) Side view of the spring shown in FIG. The perspective view of the upper rail and locking member in background art.

<First Embodiment>
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, 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 claws 22aL to 22cL. When the claw-side allowable length L1 is larger than the claw-side maximum rotation length L3 described above, 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 portion 26 b at both ends in the longitudinal direction L, and is formed as a flat portion 26 c extending between the curved portions 26 b in the longitudinal direction L. Yes. As shown by a two-dot chain line in FIG. 4, both curved surface portions 26 b are formed along the same circular arc drawn around the rotation center O <b> 1 of the locking member 20. A flat portion 26c is formed so that a part of the arc on the vehicle floor 2 side is removed.

  Both curved surface portions 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.

  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 shaft-side allowable length L2 is larger than the maximum rotation length L4, 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 surface portions 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 accommodating hole 47. For this reason, each curved surface portion 26b rolls on both side surfaces 47a and 47b of each shaft receiving hole 47, so that the locking member 20 can rotate 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.

  Moreover, you may press-fit the rotating shaft part 26 in the shaft accommodation hole 47 of the upper rail 40 with the following method. 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.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) The rotation shaft portion 26 is formed to be curved 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. Further, curved surface portions 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 receiving 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. In addition, the locking member 20 can be rotatably supported in the upper rail 40 with a simpler configuration as compared with the prior art.

Further, since the rotation shaft portion 26 is formed to be curved with respect to the main body portion 21, the shaft-side maximum rotation length L4 can be reduced as compared with the case of the columnar rotation shaft portion.
(2) 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.

  (3) By removing the front end side of the rotation shaft portion 26 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.

  In addition, the function as the rotation shaft is realized through the two curved surface portions 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.

  (4) 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 surface portions 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.

  (5) 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.

  (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.

(9) The rotating shaft portion 26 is curved and formed so as to be easily bent in the width direction W with respect to the main body portion 21. For this reason, it becomes easy to press-fit the locking member 20 into the upper rail 40.
<Second Embodiment>
A second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 10, the vehicle seat slide device 1 of the present embodiment includes substantially the same components as those of the first embodiment. The first embodiment is different from the second embodiment particularly in the configuration of the locking member and the spring.

  Specifically, in the first embodiment, the rotating shaft portion 26 is curved. In the second embodiment, as shown in FIGS. 11A to 11C, FIG. 12A, and FIG. 12B, the rotation shaft portion 27 is provided in the longitudinal direction L of the locking member 20. Are formed in the shape of a rectangular flat plate extending to the main body 21 of the locking member 20. That is, the rotation shaft portion 27 is at the same height as the main body portion 21 as viewed from the width direction W of the main body portion 21 as shown in FIG. 11B, and its width from the main body portion 21 as shown in FIG. It extends linearly on both sides along the direction W. The two rotation shaft portions 27 extend from the main body portion 21 in opposite directions.

  As shown in FIG. 13, when viewed from the width direction W of the main body portion 21, each rotation shaft portion 27 includes a pair of side surfaces 27 c extending in the height direction of the main body portion 21. Each side surface 27 c includes a curved surface 27 b formed at an end portion close to the vehicle floor 2. The curved surface 27 b is formed so as to curve toward the center of the rotating shaft portion 27 as it goes toward the vehicle floor 2. Similar to the first embodiment, the two rotating shaft portions 26 are respectively inserted into the shaft receiving holes 47. At this time, both curved surfaces 27 b are in contact with the shaft side surface 47 b of the shaft receiving hole 47. Thereby, the locking member 20 of the second embodiment is also supported to be rotatable with respect to the upper rail 40. The vehicle seat slide device 1 according to the second embodiment operates in the same manner as in the first embodiment.

  As shown in FIGS. 14 (a) and 14 (b), in the second embodiment, the spring 50 includes a pair of tips 57 positioned at the tips thereof. Each tip 57 is bent inward in the width direction W, and extends substantially perpendicular to the longitudinal direction L of the spring 50. Each tip 57 is located adjacently along the longitudinal direction L of the spring 50.

As described above, according to the embodiment described above, the following operations and effects can be obtained particularly as compared with the first embodiment.
(9) In any of the embodiments, when a collision force along the vehicle front-rear direction (longitudinal direction L) is applied to the vehicle seat slide device 1, the rotary shaft portions 26, 27 are connected to the shaft receiving hole 47. A collision force is received below the main body 21 through the side surfaces 47a and 47b. For example, when the vehicle receives an impact from the rear, the rotating shaft portion 26 receives a collision force in the left direction in FIG. 4 with respect to the point P2 in FIG. 4 through the shaft side surface 47b. Thus, since the locking member 20 receives a collision force below the main body portion 21, the locking member 20 has a rotational moment in a direction in which the input portion 28 approaches the distal end portion 61 of the release handle 60. Arise. In the first embodiment, the collision member 20 is applied with the collision force on the rotating shaft portion 26 positioned toward the vehicle floor 2 with respect to the main body portion 21. In the second embodiment, the impact force is applied to the locking member 20 on the rotary shaft portion 27 that exists at the same position as the main body portion 21 in the height direction H of the vehicle. It is known that the rotational moment applied to the locking member 20 increases as the point of action where a collision force is applied approaches the vehicle floor 2 from the main body 21. Therefore, the moment applied to the locking member 20 at the time of the collision is smaller in the second embodiment than in the first embodiment. For this reason, in the second embodiment, since the moment applied to the locking member 20 is relatively small at the time of the collision, the locking member 20 is prevented from being deformed by the moment. Since deformation of the locking member 20 is suppressed, a collision load in the vehicle front-rear direction can be reliably received, and the stability of holding the locked state when a collision force is applied is improved.

  (10) The pair of tips 57 of the spring 50 extend inward in the width direction W. In this case, both the tips 57 can be in line contact with the locking member 20, respectively. Therefore, the area where the spring 50 contacts the locking member 20 is increased. Therefore, the locking member 20 is more stably held by the spring 50.

  (11) The rotation shaft portion 27 extends linearly from the main body portion 21 to both sides along the width direction W at the same height as the main body portion 21 when viewed from the width direction W of the main body portion 21. In this configuration, the rotation shaft portion 27 can be formed on the locking member 20 more easily. The shaft-side maximum rotation length L4, which is the length of the maximum straight line 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 when viewed from the longitudinal direction L, can be set short. .

In addition, each said embodiment can be implemented with the following forms which changed this suitably.
-In 1st Embodiment, the rotating shaft part 26 is curved and formed in the direction of the vehicle floor 2 with respect to the main-body part 21 of the latching member 20, so that the front end surface 26a may follow the longitudinal direction L. As shown in FIG. However, the rotating shaft portion 26 may be formed to be bent at a substantially right angle with respect to the main body portion 21.

  In each of the above embodiments, 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 each said embodiment other than a vehicle.
In the above embodiments, the numbers of the locking claws 22aR to 22cR, 22aL to 22cL and the locking claw holes 49a to 49c of the locking member 20 can be changed as appropriate.

  In the first embodiment, the flat surface portion 26 c is formed on the distal end surface 26 a of the rotation shaft portion 26. However, the flat surface portion 26c may be omitted, and the entire tip surface 26a of the rotating shaft portion 26 may be formed in a curved shape. In this case, the shaft accommodating hole 47 may be formed in a cylindrical shape.

-The locking member 20 in the said embodiment may be manufactured using casting.
Next, the technical idea that can be grasped from the embodiment will be described together with the effects.
(A) 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.

(B) The locking claw hole penetrates in the width direction in each side wall portion and does not open in the height direction.
According to this configuration, since the locking claw hole does not open 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.

  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, 27 ... rotating shaft part, 26a ... tip surface, 26b ... curved surface part, 26c ... flat part, 28 ... input part, 30 ... lower rail, 31 ... lower side wall part, 32 ... lower connecting wall part, 33 ... lower turn-back Wall part, 33a ... Lock hole, 40 ... Upper rail, 44a ... First upper side wall part, 44b ... Second upper side wall part, 45 ... Upper connecting wall part, 46 ... Upper folded wall part, 46a ... Insertion groove, 47 ... Shaft housing hole, 48 ... Spring holding hole, 49a-49c ... Locking claw hole, 50 ... Spring, 51 ... Holding part, 52 ... Biasing part, 53 ... Abutting part, 54 ... Escape part, 60 ... Release handle.

Claims (6)

The first rail;
A second rail coupled to the first rail so as to be relatively movable along a longitudinal direction of the first rail;
A locking member rotatably supported in the second rail,
The second rail includes first and second side wall portions facing in the width direction perpendicular to the longitudinal direction of the second rail,
The first and second side wall portions are formed with receiving holes into which a part of the locking member is inserted,
The locking member is
The main body,
As seen from the thickness direction of the main body, the main body extends from the main body to both sides along the width direction, and at least a part of the front end can roll along the side surface forming the receiving hole. A rotating shaft formed in a curved surface;
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 a rotation position of the locking member via the rotating shaft portion. Prepared ,
One end portion in the height direction perpendicular to the longitudinal direction and the width direction in the accommodation hole of the first side wall portion and the other end portion in the height direction in the accommodation hole of the second side wall portion are connected. Let the length of the virtual straight line be the allowable length on the axis side,
In the main body portion, the maximum rotation on the axial side is the length of an imaginary straight line connecting one side surface of the two side surfaces on which the rotation shaft portion is formed and the tip of the rotation shaft portion formed on the other side surface. 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 first rail;
A second rail coupled to the first rail so as to be relatively movable along a longitudinal direction of the first rail;
A locking member rotatably supported in the second rail,
The second rail includes first and second side wall portions facing in the width direction perpendicular to the longitudinal direction of the second rail,
The first and second side wall portions are formed with receiving holes into which a part of the locking member is inserted,
The locking member is
The main body,
As seen from the thickness direction of the main body, the main body extends from the main body to both sides along the width direction, and at least a part of the front end can roll along the side surface forming the receiving hole. A rotating shaft formed in a curved surface;
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 a rotation position of the locking member via the rotating shaft portion. Prepared ,
The seat slide device is formed such that the rotating shaft portion is bent with respect to the main body portion of the locking member so as to face the width direction . The first rail;
A second rail coupled to the first rail so as to be relatively movable along a longitudinal direction of the first rail;
A locking member rotatably supported in the second rail,
The second rail includes first and second side wall portions facing in the width direction perpendicular to the longitudinal direction of the second rail,
The first and second side wall portions are formed with receiving holes into which a part of the locking member is inserted,
The locking member is
The main body,
On both sides of the main body so as to be flush with the plane extending in the width direction of the main body at the same height as the main body along the width direction from the main body as viewed from the thickness direction of the main body. A rotating shaft portion that is extended and at least partially formed in a curved shape so that its tip portion can roll along the side surface forming the accommodation hole;
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 a rotation position of the locking member via the rotating shaft portion. Seat slide device provided. In the seat slide device according to any one of claims 1 to 3 ,
The tip surface of the rotating shaft is
A flat surface part in which the tip side of the rotating shaft part protruding in the height direction is removed along the longitudinal direction;
Two curved surfaces that are formed on both sides of the flat portion in the longitudinal direction, are positioned on the same virtual arc when viewed from the width direction, and are in contact with the side surface of the receiving hole facing the longitudinal direction so as to allow rolling. And a seat slide device. The seat slide device according to claim 4 ,
A seat slide device in which a distance between two side surfaces of the accommodation hole in contact with two curved surface portions of the rotation shaft portion is set to be smaller toward the first rail side in the height direction. In the seat slide device according to any one of claims 1 to 5 ,
A seat slide device in which only a part of the tip portion of the rotating shaft portion is formed in a curved surface shape .