JP2010179688A - Slide structure of vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a smooth slide of a seat even if a foreign matter exists on a lower rail without increasing the number of component parts and without making a structure complex, either, by making the head shapes of fasteners to be such a shape that the foreign matter can pass over. <P>SOLUTION: Lower rails of a long shape arranged at vehicle floor side and upper rails 10 arranged at seat side are arranged in a fitting state to make the seat slidable to the vehicle floor side. The lower rails are structured in a U shape open upward in cross section. At the position of bottom surface parts of this U shape in cross section, the lower rails are attached to vehicle side members by the fasteners of caulking pins 72 and location pins 70. The head shape of the caulking pins 72 are structured to be a moderate slope shape 72a1 that the foreign material 80 existing on the bottom surface of a lower rail can pass over when pressed by an upper rail 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sliding structure for a vehicle seat. Specifically, the present invention relates to a vehicle seat slide structure in which a seat installed in a vehicle compartment is slidable with respect to a vehicle floor, and even when a foreign object enters the slide structure, the seat is smoothly adjusted. Is to make it possible.

The vehicle seat slide structure installed in the interior of a vehicle such as an automobile has a long lower rail that is attached to the vehicle body floor via leg members and a long upper rail that is attached to the lower part of the seat. The seat is slidable with respect to the vehicle floor in the inserted and fitted state.
The long lower rail has a U-shaped cross-sectional shape with an opening upward, and the upper rail is slidable with a cross-sectional shape that fits along the inner surface of the U-shaped lower rail. Is fitted.
When attaching the lower rail to the vehicle floor via the leg member, a pin-like fastener such as a rivet is used for connecting and fixing the lower rail and the leg member in order to avoid deformation due to the thermal influence during the fixing. Yes. This pin-shaped fastener is a shaft-shaped member having a head at the end. And attachment by fasteners, such as this rivet, is normally performed in the edge part position of the longitudinal direction of a lower rail, and is performed in the bottom part position of a U-shape.
By the way, since the lower rail is U-shaped with an upper opening, foreign matter such as coins and writing instruments may fall and be positioned in the lower rail from the opening. When the upper rail slides, the foreign matter that falls and falls in the lower rail is pushed by the front end of the upper rail in the sliding direction and moves together.
The above-mentioned movement of the upper rail will not cause a problem if the slide is in a range that is not related to the position where the fastener is installed, but if the slide is moved to the position where the fastener is installed, it moves together with the upper rail. The foreign matter that has hit the side of the head of the fastener prevents further movement of the foreign matter. For this reason, sliding of the upper rail is also prevented, which may hinder the seat slide adjustment.
For this reason, as shown in Patent Document 1, when a foreign object has moved to the front position of the head of the fastening portion, a slide-like member having a loose inclined surface is provided separately so that the head of the fastener can be overcome. There are some configurations.
As a result, when a foreign object falls into the lower rail and is pushed and slid by the upper rail and slides to the position of the fastener, the foreign object is lifted and slid upward by a slide-like member having a loosely inclined surface. Can get over the head of the fastener. As a result, even when a foreign object exists on the lower rail, the slide adjustment of the seat can be performed smoothly.

JP 2004-359072 A

  However, as described above, when a slide-like member having a loose inclined surface is separately provided in order for the foreign matter to get over the head of the fastener, the number of components tends to increase and the configuration is inevitably required. There is a problem that it becomes complicated.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to provide a component part by making the shape of the head of the fastener itself so that foreign matter can get over. Therefore, the seat can be smoothly slid even when foreign matter is present in the lower rail without increasing the number of members and without complicating the structure.

In order to achieve the above object of the present invention, the present invention takes the following means.
First, the basic means taken by the vehicle seat slide structure according to the present invention is a vehicle seat slide structure in which a seat installed in a vehicle compartment is slidably installed on a vehicle floor. A long lower rail arranged on the floor side and an upper rail arranged on the seat side are fitted and arranged so that the seat can slide with respect to the vehicle floor. The lower rail is configured as a U-shaped cross-section with an upper opening, and is attached to a member on the vehicle body side by a fastener of a shaft-shaped member having a head at the bottom surface position of the U-shaped cross-section, and the attachment The position is the end position in the longitudinal direction of the lower rail. When the upper rail slides, the head shape of the fastener on the side facing the sliding end surface of the upper rail is a gentle slope shape that can be overcome when a foreign object existing on the bottom surface of the lower rail is pressed by the upper rail. It is characterized by being.

  According to the above basic means of the present invention, the head shape of the fastener for attaching the lower rail to the member on the vehicle body floor side is a gentle slope that can be overcome when a foreign object existing on the bottom surface of the lower rail is pressed by the upper rail. It is made into a shape. For this reason, when foreign objects such as coins and writing instruments fall into the lower rail that opens upward and are positioned at the bottom of the lower rail, the upper rail slides in this state, and the foreign object moves at the front end in the sliding direction of the upper rail. However, the foreign object can move over the head of the fastener. Therefore, even when a foreign object has fallen into the lower rail, the seat can be smoothly slid, and the slide adjustment is not hindered.

  The vehicle seat slide structure of the basic means of the present invention described above preferably adopts the following means.

First, the head shape of the fastener in the above basic means is different in slope shape between the side facing the sliding end surface of the upper rail and the opposite surface side, and the shape on the opposite surface side is formed as a tight slope shape. Is preferred.
In the case of the above means, the head shape of the fastener can be reduced. In other words, when making the shape of a gentle slope to get over a foreign object, the height of the head shape is the same as the conventional height, and in order to ensure the same strength as the conventional, it is usually a wide planar shape Need. For this reason, only the side where the foreign object moves and comes into contact with the gentle slope is used, and the shape of the other part is made to be a tight slope so that the increase in the flat area for forming the head is minimized. The head shape is reduced in size.

Next, it is preferable that the head shape of the fastener of the shaft-shaped member in each means described above is formed by caulking the end of the shaft-shaped member.
By using the above means, it is possible to easily form the head shape of the fastener.

Further, in each of the above-described means, the lower rail is configured to be attached to the vehicle floor via the leg member, and the fastener that fixes the lower rail and the leg member is the fastener of the shaft member, and the fastening of the shaft member The fastener is arranged in the longitudinal direction at the end position in the longitudinal direction of the lower rail, and a plurality of fasteners are arranged side by side in a close positional relationship. It is preferably a location pin, and it is preferable that a gentle slope shape that allows foreign matters to get over only the head of the first fastener facing the sliding direction end surface of the upper rail among the plurality of fasteners is formed. .
In the case of the above means, since one of the fasteners for connecting and fixing the lower rail and the leg member is a location pin, positioning when the vehicle seat is attached to the vehicle body floor can be performed effectively. That is, the location pin can be used also as a fastener for connecting and fixing, and the number of pins when the vehicle seat is attached to the vehicle body floor can be reduced. In this case, it is preferable that the location pin is located at the outermost position.

According to the above-described means of the present invention, the following effects can be obtained.
First, according to the basic means of the present invention described above, the head shape of the fastener itself has a gentle slope shape that can be overcome when a foreign object existing on the bottom surface of the lower rail is pressed by the upper rail. Therefore, the vehicle seat can be smoothly slid even when foreign matter is present in the lower rail without increasing the number of components and without complicating the configuration.

  In the above-mentioned basic means, when the head shape of the fastener is made to have a different slope shape on the side facing the end surface in the sliding direction of the upper rail and the opposite surface side, and the shape on the opposite surface side is a tight slope shape The size of the head shape of the fastener can be reduced.

  In addition, when the head shape of the fastener of the shaft-shaped member in each means described above is formed by caulking the end of the shaft-shaped member, it is easy to form the head shape. be able to.

  Furthermore, in each of the above-described means, when the lower rail and the leg member are connected and fixed using a plurality of fasteners when the lower rail is attached to the vehicle body floor via the leg member, one of them is used as a location pin. The number of fasteners such as pins for attaching the vehicle seat to the vehicle body floor can be reduced. In this case, if the location pin is located at the outermost position, the function of the location pin can be suitably performed.

1 is a perspective view illustrating a schematic configuration of a vehicle seat according to Embodiment 1. FIG. It is a disassembled perspective view of the support component of a vehicle seat. It is an assembly drawing of the support component of a vehicle seat. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a figure for demonstrating a connection structure with the leg member in the front-end part position of a lower rail. It is sectional drawing which shows the modification 1 of the connection structure of a lower rail and a leg member. It is sectional drawing which shows the modification 2 of the connection structure. It is sectional drawing which shows the modification of the crimping pin which has a gentle slope-shaped head.

Embodiments of the present invention will be described below with reference to the drawings.
First, the structure of the structure which attaches a vehicle seat to a vehicle body floor so that a slide is possible is demonstrated using FIGS.
FIG. 1 is a perspective view showing a schematic configuration of the entire vehicle seat 1. The vehicle seat 1 is disposed as a driver seat, and includes a seat back 2 serving as a backrest portion and a seat cushion 3 serving as a seating portion. The vehicular seat 1 is configured such that a slide position in the front-rear direction with respect to the vehicle body floor F can be adjusted by a pair of left and right slide mechanisms 4 provided between the seat cushion 3 and the vehicle body floor F. These slide mechanisms 4 and 4 are normally held in a locked state in which sliding movement in the front-rear direction of the vehicle seat 1 is restricted. The slide mechanisms 4 and 4 are operated to release the above-mentioned locked state all at once by performing a pull-up operation of the operation lever L disposed at a lower position on the front side of the seat cushion 3. .
Accordingly, when the operation lever L is pulled up, the slide mechanisms 4 and 4 are unlocked, so that the vehicle seat 1 can be slid in the front-rear direction. Each of the slide mechanisms 4 and 4 is returned to the locked state in which the slide movement of the vehicle seat 1 can be restricted again by stopping the pulling operation of the operation lever L.
Hereinafter, the structure of each slide mechanism 4 and 4 and its assembly structure will be described. The slide mechanisms 4 and 4 are formed in a symmetrical shape on the left and right, but have substantially the same configuration. Therefore, hereinafter, only the configuration of the slide mechanism 4 on one side shown on the right side in FIG. 1 will be described.

FIG. 2 shows the slide mechanism 4 in an exploded perspective view. The slide mechanism 4 includes an upper rail 10 and a lower rail 20 that are formed in a long shape in the front-rear direction as slide parts, and a lock member 30 for locking the slide movement of these slide parts.
The upper rail 10 is assembled to the seat cushion 3 by a support frame 50 shown on the upper side in the figure. The lower rail 20 is integrally assembled to the vehicle body floor F by the front and rear leg members 40F and 40R shown on the lower side of the figure. The lower rail 20 is formed in a shape having a U-shaped cross section and enclosed on both sides. The upper rail 10 is inserted into the lower rail 20 in the longitudinal direction from the front or rear opening in the longitudinal direction into the U-shaped enclosure. Accordingly, the upper rail 10 is guided to slide in the front-rear direction by the U-shaped enclosure shape of the lower rail 20. Since the lower rail 20 is formed in a U-shaped cross-sectional shape, the upper portion has an opening 24B, and foreign matter such as coins and writing instruments may fall into the inside from the opening 24B. The state where the upper rail 10 is assembled to the lower rail 20 is shown in FIG.

Returning to FIG. 2, the lock member 30 is assembled to the upper rail 10. The lock member 30 can be inserted through four through-holes 12H and a through-hole 13H formed through a right side surface portion 12R and a right fin surface portion 13R of the upper rail 10 which will be described later. The engaging claws 32 are formed. The operation lever L described above with reference to FIG. 1 is coupled to the operation arm 31 formed to extend in the shape of the arm of the lock member 30. Accordingly, the lock member 30 is operated in such a manner that each engagement claw 32 is inserted into and removed from each through hole 12H,... And through hole 13H,. It has become.
Specifically, as shown in FIG. 5, the lock member 30 is pivotally supported on the upper rail 10 by a connecting shaft 30R. The lock member 30 is normally urged to rotate counterclockwise in the figure by the urging force of a spring member (not shown) hooked between the lock member 30 and the upper rail 10. Thereby, the lock member 30 is normally urged in the insertion direction which penetrates each engagement nail | claw 32 ... and the through-hole 12H ... and the through-hole 13H ....

2 again, the four through holes 12H and the through holes 13H formed in the upper rail 10 described above are formed in the longitudinal direction of the right side surface portion 12R and the right fin surface portion 13R of the upper rail 10. They are arranged at equal intervals so as to face each other. The lower rail 20 also has a plurality of through holes 24H, which can face each other with the four through holes 12H,... And the through holes 13H,. Is formed.
These through holes 24H are arranged at equal intervals along the longitudinal direction on the right turn surface portion 24R of the lower rail 20 at the same arrangement interval as the four through holes 12H and the through holes 13H. Yes. Thus, by sliding the upper rail 10 in the front-rear direction, the four through holes 12H... And the through holes 13H. Alignment is made at regular intervals with respect to the hole shape of the holes 24H.

Therefore, as shown in FIG. 5, by sliding the upper rail 10, the above-described hole shapes between the upper rail 10 and the lower rail 20 are matched with each other in the front-rear direction, so that the lock member 30 is attached to the lock member 30. The engaging claws 32... Are inserted through the hole shapes by the force, and are held in the inserted state (shown by the solid line). As a result, the upper rail 10 is in a state where the engaging claws 32... Of the lock member 30 are engaged with the lower rail 20, and the sliding movement in the front-rear direction is restricted.
In other words, the upper rail 10 is always held before the operation lever L is pulled up, and is locked by the lock member 30 so that sliding movement in the front-rear direction is restricted. The upper rail 10 is switched to a state in which the upper rail 10 can slide and move in the front-rear direction because the lock state by the lock member 30 is released by performing an operation of pulling up the operation lever L.
As shown in FIG. 6, bearings K and K (ball bearings) are disposed on both outer sides of the right fin surface portion 13 </ b> R and the left fin surface portion 13 </ b> L of the upper rail 10. Thereby, the sliding movement of the upper rail 10 with respect to the lower rail 20 can be performed smoothly.

Therefore, referring to FIG. 1, when the upper rail 10 is slid in the front-rear direction with the operation lever L pulled up, the slide position in the front-rear direction with respect to the vehicle body floor F of the vehicle seat 1 can be changed. If the lifting operation of the operation lever L is stopped after the slide position of the vehicle seat 1 is adjusted, the slide mechanisms 4 and 4 can be returned to the locked state and the vehicle seat 1 can be held at the adjusted slide position. it can.
In FIG. 1, reference numeral 5 denotes a buckle of the seat belt device, and the buckle 5 is attached to a left side surface portion 53 of a support frame 50 to be described later via an attachment plate 5A.

Next, specific shapes of the upper rail 10 and the lower rail 20 will be described in detail.
First, the shape of the upper rail 10 will be described. As shown in FIG. 2, the upper rail 10 is formed in a cross-sectional shape that can be slidably fitted in the longitudinal direction to the lower rail 20 having the U-shaped enclosure-shaped cross section.
The upper rail 10 is formed in a certain cross-sectional shape as shown in the figure by bending a single flat plate member made of steel material in some places. Specifically, the cross-sectional shape of the upper rail 10 is well shown in FIG. As shown in the figure, the upper rail 10 is flipped up outward from the flat plate-shaped upper surface portion 11, the flat plate-shaped right side surface portion 12 </ b> R and the left side surface portion 12 </ b> L that hang straight from both sides thereof. The right fin surface portion 13R and the left fin surface portion 13L are formed in a cross-sectional shape. Returning to FIG. 2, four through holes 12H,... And through holes 13H,... Penetrated in the plate thickness direction are formed on the surface portions of the right side surface portion 12R and the right fin surface portion 13R near the center in the front-rear direction. They are arranged in the width direction at equal intervals along the longitudinal direction.
A receiving port 15 for assembling the lock member 30 described above is formed in the upper surface portion 11 and the right side surface portion 12R at the surface portion near the center of the upper rail 10 in the front-rear direction.
A cap C capable of closing the opening shape is attached to the opening portion on the rear side in the longitudinal direction of the upper rail 10.

Next, the shape of the lower rail 20 will be described. As shown in FIG. 2, the lower rail 20 is formed in a cross-sectional shape having a U-shaped surrounding shape that can guide the upper rail 10 slidably in the front-rear direction.
The lower rail 20 is formed in a certain cross-sectional shape as shown in the figure by bending a single flat plate member made of steel material in some places. Specifically, the cross-sectional shape of the lower rail 20 is well shown in FIG. As shown in the figure, the lower rail 20 is folded horizontally inward from the upper end of the flat plate-shaped lower surface portion 21 which is the bottom surface portion, the flat plate-shaped right side surface portion 22R and the left side surface portion 22L rising from both sides thereof. The plate-shaped upper surface portions 23R, 23L and the plate-shaped right return surface portion 24R and the left return surface portion 24L that hang straight from the inner ends thereof are formed in a cross-sectional shape. Then, referring back to FIG. 2, a plurality of through holes 24H,... And through holes 24H, penetrating in the plate thickness direction over the longitudinal direction are arranged at equal intervals on the right turn surface portion 24R and the left turn surface portion 24L. Is formed. The through holes 24H are formed in the left turn surface portion 24L so that the lower rail 20 can be used as a rail component for the right side or a left side of the vehicle seat 1. is there.

Next, the configuration of the support frame 50 fixed to the upper surface portion 11 of the upper rail 10 will be described with reference to FIG.
The support frame 50 is formed in a cross-sectional shape in which both sides rise as shown in the figure by bending a flat plate member made of a steel material in some places. The lower surface 51 of the support frame 50 is fastened to the upper surface 11 of the upper rail 10 by a plurality of bolts B1... And nuts N.
As shown in FIG. 4, a link for connecting the lower ends of the elevating links 60F and 60R to the right and left side portions 52 rising on the left side of the support frame 50 at the front and rear positions thereof, as shown in FIG. Connection holes 52F and 52R are formed to penetrate in the plate thickness direction. As shown in FIG. 4, the elevating links 60F and 60R have their upper ends linked to the skeleton frame of the seat cushion 3. The elevating links 60F and 60R move the vehicle seat 1 up and down along with its pivoting motion. The position can be adjusted.

  Here, the cross-sectional shape of the support frame 50 described above is well shown in FIG. 6, which is a cross-sectional view taken along the line VI-VI in FIG. As shown in the figure, the lower surface portion 51 is folded back in the horizontal direction (width direction) from the first folded portion 50A hanging down from the right side surface portion 52, which is the cushion fixing surface portion, to the left side (inner side) in the drawing. Is formed. Then, the left side surface portion 53 is formed to be folded back in a directly upward direction from a second folded portion 50B extending from the lower surface portion 51 to the left side in the figure. The second folded portion 50B is set at a position separated to the left side (inner side) in the drawing from the bolt fastening portion 50C of the plurality of bolts B1... Fastened along the longitudinal direction of the lower surface portion 51 described above. Yes.

Next, the Example for attaching the lower rail 20 of the structure characterized by this invention to the vehicle floor F is demonstrated. As shown in FIG. 2, the lower rail 20 is attached to the vehicle floor F via leg members 40F, 40R. That is, the leg member 40F is disposed and attached at the lower position of the front end portion of the lower rail 20, and the leg member 40R is disposed and attached at the lower position of the rear end portion of the lower rail 20, and is respectively attached to the vehicle floor F. Yes.
More specifically, the connection fixing for attaching the lower rail 20 and the leg member 40F at the front end portion of the lower rail 20 is performed by the location pin 70 and the caulking pin 72. The location pin 70 and the caulking pin 72 are arranged linearly in the longitudinal direction of the lower rail 20, and the position thereof is the center position in the width direction of the lower surface portion 21 that is the bottom surface portion of the lower rail 20. The attachment for connecting and fixing the leg member 40F and the vehicle floor F is omitted in the figure, but is performed by a conventionally known method. For example, it is performed by a caulking pin.
The connecting and fixing for attaching the lower rail 20 and the leg member 40R at the rear end portion of the lower rail 20 are performed by two caulking pins 74 and 76. The two caulking pins 74 and 76 are arranged in a straight line in the longitudinal direction of the lower rail 20 as in the case of the leg member 40F described above, and the position thereof is also the lower surface portion which is the bottom surface portion of the lower rail 20 21 is the center position in the width direction. The attachment for connecting and fixing the leg member 40R and the vehicle floor F is also performed by a conventionally well-known method as described above, although not shown.
In addition, the leg members 40F and 40R in the above-described embodiment correspond to members on the vehicle body floor side of the present invention, and the location pin 70 and the caulking pins 72 and 74 for connecting and fixing the lower rail 20 to the leg members 40F and 40R, 76 corresponds to a fastener for a shaft-like member having a head according to the present invention.

FIG. 7 schematically shows a connecting and fixing portion for attaching the lower rail 20 and the leg member 40F at the front end portion of the lower rail 20 in order to facilitate understanding of the description. FIG. ) Is a plan view showing the head shape of the location pin 70 and the caulking pin 72, and (C) is a sectional view of the caulking tool.
As shown in FIG. 7A, the location pin 70 and the caulking pin 72 for connecting and fixing the lower rail 20 and the leg member 40F are located on the outer side of the left side position as seen in FIG. A caulking pin 72 is disposed at an inner position of the right position. The location pin 70 and the caulking pin 72 are arranged close to each other, and the arrangement is such that a foreign object 80 such as a coin or a writing instrument indicated by an imaginary line does not enter between the two.

As shown in FIG. 7A, the shape of the head portion 72a of the caulking pin 72 is formed such that the shape on the right side thereof is a gentle slope shape. Specifically, it is formed as an inclined surface shape that gently rises from the right side to the left side as seen in the figure. The position formed as the slope shape is the position side where the foreign object 80 dropped on the lower rail 20 first contacts when moved by being pushed by the end portion 10F of the upper rail 10, and this slope shape is determined at that time. The shape allows the foreign object 80 to be overcome. In addition, the slope shape 72a1 of the head shape 72a is illustrated in view of the volume of the head shape that can ensure the conventional strength from the viewpoint of securing a predetermined strength at the same height as the conventional head shape. As shown in FIG. 7 (B), when viewed in a plan view, the inclined portion is formed to slightly increase in the right direction. However, as seen in FIG. 7A, the left side shape 72a2 of the head 72a has a conventional shape, and is formed as a tighter slope shape than the gentle slope shape 72a1 on the right side. More specifically, it is formed as a vertical shape. That is, the slope shape is different between the right side and the left side of the head 72a, and the slope shape on the side that comes into contact when the foreign object moves is a gentle slope shape 72a1, but the opposite shape is a tight slope shape. 72a2, and the head 72a has a structure in which the area of the head is reduced as much as possible while ensuring the strength of the head 72a.
The lower rail 20 and the leg member 40F are fixed by the caulking pin 72, first, as shown in FIG. 7A, the shaft portion 72b of the caulking pin 72 shown in a broken line state from the lower side of the hole of the leg member 40F and the lower rail 20 is fixed. The fixing hook 72c at the lower end is fixed by a fixing jig through the hole. Then, the upper end portion of the caulking pin 72 is caulked by a caulking jig 90 shown in FIG. 7C to form the head 72a. A gentle slope shape formed by caulking with the caulking jig 90 is a portion 72a1 indicated by hatching in FIG.

  The location pin 70 positions the mounting position of the vehicle seat 1 with respect to the vehicle floor F when the vehicle seat 1 is mounted and installed on the vehicle floor F. In this embodiment, the location pin 70 also serves as a fastener for connecting and fixing the lower rail 20 and the leg member 40F. The fixing of the lower rail 20 and the leg member 40F by the location pin 70 is performed in the same manner as the caulking pin 72 described above, and caulking is performed by the caulking jig 92 shown in FIG. Fixed. That is, first, as shown in FIG. 7A, the shaft portion 70b of the location pin 70 shown in a broken line state is inserted into the hole of the leg member 40F and the hole of the lower rail 20 from the lower side, and the lower fixing collar portion 70c is inserted. Fix with a fixture. Then, the upper end portion of the location pin 70 is caulked by a caulking jig 92 shown in FIG. Note that the shape of the head portion 70a formed by caulking is the same shape as the conventional one, and is round as shown in FIG. 7B. The lower end portion of the location pin 70 is formed as a long pin-shaped positioning pin portion 70d, which is inserted and fitted into a positioning hole formed in the vehicle floor F to attach and install the vehicle seat 1 described above. Positioning.

  The two caulking pins 74 and 76 for connecting and fixing the lower rail 20 and the leg member 40R at the rear end portion of the lower rail 20 are also connected and fixed by caulking in the same manner as the connecting and fixing of the front leg member 40F described above. ing. The caulking pin 74 is formed with a gentle slope shape that allows the foreign object 80 to get over like the caulking pin 72 described above. The gentle slope shape is formed on the side that comes into contact when the foreign material 80 moves.

Next, the operation of the embodiment having the above configuration will be described.
Since the lower rail 20 has a U-shaped cross section and is open upward as can be easily understood in FIG. 2, if a foreign object 80 such as a coin or a writing instrument is accidentally dropped at the fitting position between the lower rail 20 and the upper rail 10. If the dropped position is a position where the upper rail 10 is not located, the dropped position falls from the opening 24B of the lower rail 20 to the bottom surface of the lower surface portion 21 and is positioned. When the vehicle seat 1 is slid in the front-rear direction to adjust the front-rear position, as shown in FIG. 7A, the foreign matter 80 is pushed by the end portion 10F of the upper rail 10 fixed to the seat cushion side. The bottom part of the lower rail 20 is moved. When the foreign object 80 moves to the position of the caulking pin 72, the foreign object 80 moves over the head 72a along the gentle slope shape 72a1 of the head 72a of the caulking pin 72. Further, when the foreign object 80 moves, the foreign object 80 can also be moved beyond the head 70a of the location pin 70 and discharged from the end of the lower rail 20 to the outside. The movement of the foreign object 80 between the head 72a of the caulking pin 72 and the head 70a of the location pin 70 is set so that the distance between the two 72a and 70a is close, and the foreign object 80 falls between the two 72a and 70a. This is because it is configured with no interval.
Therefore, according to the above-described embodiment, the vehicle seat 1 can be smoothly slid even when the foreign object 80 has fallen into the lower rail 20, and the front-rear position adjustment of the vehicle seat 1 can be performed without hindrance. it can.

A modification of the above embodiment will be described below. In these modified examples, the same components as those in the above embodiment are denoted by the same reference numerals, and the description of the configurations may be omitted.
FIG. 8 shows a first modification. FIG. 8 corresponds to FIG. 7 (A). In the first modification, the two fasteners for connecting and fixing the leg member 40F and the lower rail 20 are the caulking pins 72 and 82, respectively. In the first modification, the leg member 40F and the vehicle floor F are attached and fixed by the fastening bolts 84.

  FIG. 9 shows a second modification. FIG. 9 also shows FIG. 9 corresponding to FIG. 7A, similarly to FIG. 8 of the first modification. This modification 2 is an example in which a location pin 86 and a tightening bolt 88 are arranged at the end of the lower rail 20, and the location pin 86 is used exclusively for the function of positioning the vehicle seat 1 with respect to the vehicle floor F. Is arranged as. Accordingly, in the second modification, the location pin 86 does not function as a fastener for connecting and fixing the lower rail 20 and the leg member 40F, and only the fastening bolt 88 functions as a fastener for connecting and fixing the lower rail 20 and the leg member 40F. It is supposed to be configured. A gentle slope 86a1 is formed on the head 86a of the location pin 86.

FIG. 10 shows a modification of a caulking pin having a gently sloping head. In (A), a gentle slope shape is formed on the left side as viewed in the figure, and the flat area of the head shape is substantially the same as the conventional flat area. For this reason, a volume for obtaining the same strength as the conventional one is secured upward. The right side slope shape is a vertical shape, and the right side and left side slope shapes are different.
The head shape of the modification shown in FIG. 10B is a gentle slope shape, and the entire head surface is a straight slope shape. In the drawing, it is formed as an inclined shape rising from the left side to the right side.
The head shape of the modified example shown in FIG. 10 (C) is a slope having a gentle slope shape with a curved shape, and the curved shape is different between the right side and the left side in the figure. The curve shape on the left side is a gentler curve shape than the curve shape on the right side.

As mentioned above, although each Example of this invention was described, this invention can be implemented with various forms other than the said Example.
For example, in the above embodiment, the case where the vehicle seat is a driver's seat of an automobile has been described. However, the present invention can also be applied to a passenger seat or a slidable seat arranged in the second or third row. It is.
Further, in the above-described embodiment, the configuration in which the lower rail is attached to the vehicle floor via the leg member has been described. However, the lower rail may be directly attached to the vehicle floor without using the leg member.
In the above embodiment, as a fastener for a shaft-shaped member having a head, a case where the head is caulked and a location pin, and a case where it is a tightening bolt has been described. A shaft-like member having a head that can form a gentle slope shape can be widely used.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Slide mechanism 10 Upper rail 20 Lower rail 30 Lock member 32 Engagement claw 40F, 40R Leg member 50 Support frame 60F, 60R Lifting link 70 Location pin 70a Head 70a1 Loose slope shape 70b Shaft Part 70c fixing hook part 70d pin part 72 caulking pin 72a head part 72b shaft part 72c fixing hook part 84 clamping bolt 86 location pin 88 clamping bolt 90, 92 caulking jig F vehicle body floor

Claims (4)

A vehicle seat slide structure in which a seat installed in a vehicle compartment is slidably installed on a vehicle floor,
A long lower rail arranged on the vehicle body floor side and an upper rail arranged on the seat side are fitted and arranged so that the seat can slide with respect to the vehicle floor,
The lower rail is configured as a U-shaped cross section with an upper opening, and is attached to a member on the vehicle body floor side by a fastener of a shaft-shaped member having a head at the bottom surface position of the U-shaped cross section, and the The attachment position is the end position in the longitudinal direction of the lower rail,
When the upper rail slides, the head shape of the fastener on the side facing the sliding end surface of the upper rail is a gentle slope that can be overcome when foreign matter existing on the bottom surface of the lower rail has been pressed by the upper rail A vehicle seat slide structure characterized by having a shape. The vehicle seat slide structure according to claim 1,
The head shape of the fastener is different in slope shape on the side facing the sliding direction end face of the upper rail and the opposite face side, and the shape on the opposite face side is formed as a tight slope shape. A vehicle seat slide structure. The vehicle seat slide structure according to claim 1 or 2,
A slide structure for a vehicle seat, wherein a head shape of a fastener of the shaft-shaped member is formed by caulking an end portion of the shaft-shaped member. A vehicle seat slide structure according to any one of claims 1 to 3, wherein
The lower rail is configured to be attached to a vehicle floor via a leg member, and a fastener that fixes the lower rail and the leg member is a fastener of the shaft-shaped member, and the fastener of the shaft-shaped member is a member of the lower rail. A plurality of fasteners are arranged side by side in the longitudinal direction at an end position in the longitudinal direction, and a fastener disposed at a longitudinally outer position among the plurality of fasteners is a location pin. The vehicle is characterized in that a gently sloping shape is formed on the first fastener that faces the end surface of the upper rail in the sliding direction of the plurality of fasteners so that foreign matters can get over the head. Seat slide structure.

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