JP2001130291A - Seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the size of a slide rail, to considerably suppress the increase in weight, and to enable considerable reduction in weight. SOLUTION: The seat comprises a seat cushion 1 forming a seating surface and a seat back 3 forming a back surface, a lower part of the seat back 3 is coupled with a connection member 7 slidably supported in the longitudinal direction by the slide rail 21 on a vehicle body side, a forward portion of the seat cushion 1 is supported by a floor side, and a rear portion thereof is supported by the connection member 7 in the seat S. The connection member 7 is positioned to an arbitrary slide position of the slide rail 21 by fitting forward and rear lock pins 23 at least in the seat slidable direction to a locking hole 25 in an attachable/detachable manner, and the load from the connection member is received by the lock pin 23 and the locking hole 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seat applied to an automobile and the like.

[0002]

2. Description of the Related Art Conventional sheets include, for example,
There is one shown in FIG. 40 described in Japanese Patent Application Laid-Open No. 7-144740. This conventional seat includes a seat cushion 1 forming a seating surface and a seatback 3 forming a backrest surface. The seat back 3 has a seat back frame 5, and the seat back frame 5 is supported by a slide rail 9 via a reclining device 7 as a connecting member so as to be slidable in the front-rear direction.
The seat cushion 1 includes a seat cushion frame 11, a roller 11 a is attached to a lower portion of a front end of the seat cushion frame 11, and is supported on a floor, and a rear portion is supported on the reclining device 7 side.

Therefore, when a load is applied rearward from the occupant to the upper side of the seat back 3 during a rear collision of the vehicle, the load is transmitted from the reclining device 7 to the vehicle body floor via the slide rail 9. Can be
Since the load is not transmitted to the seat cushion 1 side, the structure of the seat cushion 1 side can be simplified.

[0004]

However, in the conventional seat, since the rear bending load of the seat back frame 5 generated at the time of a rear collision is transmitted to the slide rail 9, these members are subjected to the bending moment. On the other hand, there was a problem that it had to be reinforced.

[0005] As shown in Fig. 41, the load applied to the seat is roughly divided into a load F1 rearward at the time of a rear collision and a load F2 depending on the weight at the time of sitting, and the magnitude of these loads is F1.
> F2. Then, when the load F1 acts on the seat back frame 5 at the time of a rear collision, the load F1 acts as a large bending moment on the slide rail 9 as shown in FIG. 41, and tends to bend the entire slide rail 9 back and forth.

On the other hand, the reclining device 7 is connected to the slide rail inner 13 of the slide rail 9 as shown in the schematic diagram of FIG. 42. Inside the slide rail 9 due to the rear collision load, the slide rail outer 15 is provided by the slide rail inner 13. The load will act in a direction in which it is flipped.

In order to prevent the deformation of the slide rail 9 by such a moment or load and to surely transmit the load, the strength and rigidity of the entire slide rail 9 must be increased. This was a cause of an increase in size and weight. Another object of the present invention is to provide a seat that can be reduced in size and weight while having a structure in which a load is transmitted to a seat slide rail by a rearward load acting on an upper portion of a seatback.

[0008]

According to a first aspect of the present invention, there is provided a seat cushion forming a seating surface and a seatback forming a backrest surface, and a lower portion of the seatback is provided on a slide rail on the vehicle body side in a front-rear direction. The seat cushion is a seat having a front portion supported on the floor side and a rear portion supported by the connection member. The connection member includes at least two front and rear portions in the seat sliding direction. The lock pin and the lock hole are detachably fitted to each other so that the slide pin is positioned at an arbitrary slide position of the slide rail, and a load from the connecting member is received by the lock pin and the lock hole.

According to a second aspect of the present invention, there is provided the seat according to the first aspect, wherein the front portion of the seat cushion is slidably supported by the floor via a slide rail and rollers. Features.

According to a third aspect of the present invention, in the seat according to the first aspect, the front portion of the seat cushion is slidably supported on a floor side via a sliding mechanism, and the rear portion is connected to the connecting member. The supporting member is supported through a connecting pin.

According to a fourth aspect of the present invention, there is provided the seat according to any one of the first to third aspects, wherein each lock pin for positioning the connecting member is positioned before and after a connecting portion of the seat back with respect to the connecting member. It is characterized by doing.

According to a fifth aspect of the present invention, there is provided the seat according to the fourth aspect, wherein the connecting portion is located at the center in the front-rear direction with respect to the front and rear lock pins.

According to a sixth aspect of the present invention, there is provided the seat according to the fourth or fifth aspect, wherein the connecting member is formed in a divergent shape such that a lower portion of the connecting portion gradually expands back and forth. .

According to a seventh aspect of the present invention, in the seat according to the fourth or fifth aspect, the connecting member is formed in an inverted T-shape in which a lower portion of the connecting portion expands back and forth. I do.

According to an eighth aspect of the present invention, in the seat according to any one of the first to seventh aspects, a plurality of the lock holes are provided in the slide rail at predetermined intervals along a sliding direction, and the lock pin is provided. Is supported by the connecting member so as to be freely movable in the axial direction so as to be able to be fitted into and disengaged from the lock hole, and the connecting member rotatably supports each bell crank corresponding to each of the lock pins; At one end of the crank, the lock pins are rotatably connected, and at the other end, the inner and outer ends of a cable formed of an inner and an outer are separately connected, and the other end of the outer of the cable is The operation unit is mounted on the operation side by supporting the fixed unit on the operation side and projecting the other end of the inner from the other end of the outer.

According to a ninth aspect of the present invention, in the seat according to any one of the first to seventh aspects, a plurality of the lock holes are provided on the slide rail at predetermined intervals along a sliding direction, and the lock pin is provided. Is provided with at least three thick pins having an outer diameter close to the inner diameter of the lock hole and thin pins which are thinner than the thick pin and have a longer insertion length into the lock hole than the thick pin, and are movably supported by the connecting member so as to be operable. And mounted integrally on the pin support bracket so as to be axially movable.

According to a tenth aspect of the present invention, in the seat according to the ninth aspect, the thick pin and the thin pin are formed to have the same length, and the mounting position of the thick pin to the pin support bracket is It is characterized in that it is further away from the slide rail than the mounting position of the thin pin.

According to an eleventh aspect of the present invention, there is provided the seat according to the ninth or tenth aspect, wherein the three lock pins are provided, and the thin pin is disposed at the center and the thick pin is disposed on both sides of the thin pin. It is characterized by the following.

According to a twelfth aspect of the present invention, there is provided the seat according to the ninth or tenth aspect, wherein the three lock pins are provided, and the thick pins are arranged at the center and the thin pins are arranged on both sides of the thick pins. It is characterized by the following.

According to a thirteenth aspect of the present invention, in the seat according to any one of the first to seventh aspects, a plurality of the lock holes are provided at predetermined intervals along the slide direction in the slide rail, and the lock holes are provided. The pin is attached to a pin support bracket movably supported by the connecting member and integrally supported so as to be axially movable, and a check hole is provided below each lock hole of the slide rail, and the connection is performed. The member is provided with a check pin which is supported movably in the axial direction in the same direction as the lock pin and whose distal end spherical portion is engaged with the check hole by the bias of a check spring.

According to a fourteenth aspect of the present invention, in the seat according to any one of the first to seventh aspects, a plurality of the lock holes are provided at predetermined intervals in the seat slide rail along a sliding direction. The lock pin is supported by the connecting member so as to be freely movable in the axial direction, and the lock hole is a long hole whose vertical dimension is close to the outer diameter of the lock pin and whose slide longitudinal dimension is almost twice as large. Four cuts shorter than the radius of the lock pin are provided at a distance of a radius of the lock pin from an end of the lock hole in the front-rear direction of the slide.

According to a fifteenth aspect of the present invention, there is provided the seat according to any one of the first to seventh aspects, wherein a plurality of the lock holes are provided at predetermined intervals in the slide rail along a slide direction, and the lock holes are provided. The pin is supported by the connecting member so as to be freely movable in the axial direction. Each of the lock holes is formed as an elongated elliptical hole extending vertically, and the lock pin has an outer diameter smaller than the inner diameter of each lock hole. It is characterized by being formed in a similar cross section.

According to a sixteenth aspect of the present invention, in the seat according to any one of the first to seventh aspects, the lock holes are provided at predetermined intervals along the slide direction in the slide rail.
A plurality of lock holes are provided in a step, and each of the upper lock holes has an upper portion having the same curvature as the outer diameter of the lock pin, and a lower portion having a curvature larger than that of the upper portion and formed as a whole with a slightly inclined backward hole. , The lower lock holes are arranged upside down in the same shape as the upper lock holes, and the front and rear lock pins are
It is characterized in that it is supported by the connecting member so as to be freely movable in the axial direction, and is separately fitted into upper and lower lock holes.

According to a seventeenth aspect of the present invention, in the seat according to any one of the first to sixteenth aspects, the slide rail includes:
It has a vertical wall along the up-down direction, and the connecting member has a sliding part which is fitted to the slide rail and guided while being opposed to the vertical wall.

[0025]

According to the first aspect of the present invention, at least two lock pins in the front and rear direction of the seat slide and the lock holes are removably fitted to be positioned at an arbitrary slide position of the slide rail, and are connected to the connecting member. Since the load can be transmitted to the slide rail side via the lock pin and the lock hole, when a rearward load is applied to the upper portion of the seat back or the like at the time of a vehicle collision, the moment acting on the slide rail side via the connecting member is at least. It can be received as the shear force of the lock pin and the stress around the lock hole due to the fitting of the two lock pins and the lock hole in the front and rear directions in the seat sliding direction, and the bending of the slide rail can be greatly suppressed.

Further, since a rearward load acting on the seat back can be received by the shearing force of the lock pin and the stress around the lock hole, cross-sectional deformation such as opening of the slide rail can be suppressed.

In addition, it is only necessary to adjust the thickness of the lock pin and to increase the strength around the lock hole in which the lock pin fits, and it is not necessary to increase the thickness of the slide rail as a whole. In addition, the weight increase is significantly suppressed, and the weight can be reduced.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the front portion of the seat cushion can be slid forward and backward with respect to the floor side via the slide rail and the roller. There is no problem in adjusting the front and rear slide. In addition, the front portion of the seat cushion is supported on the floor side via the slide rails and the rollers, so that the seat cushion can be reliably supported without jumping up during traveling. Further, by supporting the slide rail and the roller, it is possible to secure the support rigidity in the left-right direction.

According to the third aspect of the present invention, in addition to the effect of the second aspect, the seat cushion is supported by the connecting member via the connecting pin at the rear portion, and combined with the support of the front portion, the seat cushion can be reliably mounted. Support can be provided.

According to the fourth aspect of the present invention, in addition to the effect of any one of the first to third aspects, a rearward load acts on the upper side of the seat cushion to apply a load to the connecting member from the seatback via the connecting portion. Is transmitted, the lock pin receives an upward load on the front side of the connecting portion, and receives a downward load on the rear side. As a result, the load can be reliably received by the shearing force of the lock pin before and after the joint and the stress around the lock hole, making it possible to increase the size of the slide rail etc., suppress weight increase more reliably, and reduce the weight And

According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the present invention, the rearward load of the seat back can act as a couple from the connecting portion to the lock pin, so that the front and rear lock pins are even. Shear force, it is possible to act as an even stress on the lock hole, the load acting on the seat back at least two lock pins in the front and rear direction of the seat slide,
The lock holes can be efficiently received, and the increase in size and weight of the slide rail and the like can be suppressed more reliably, and the weight can be reduced.

According to the invention of claim 6, in addition to the effect of the invention of claim 4 or 5, the rigidity of the connecting member is improved by forming the connecting member into a divergent shape in which the lower portion gradually expands back and forth. The rearward load acting on the back can be reliably transmitted to the lock pin, and the increase in size and weight of the slide rail can be suppressed more reliably, and the weight can be reduced.

According to the seventh aspect of the present invention, in addition to the effects of the fourth or fifth aspect, in addition to the reverse T in which the lower portion of the connecting member expands back and forth.
By forming it into a U-shape, the rearward load acting on the seat back can be reliably transmitted to the lock pin, while the weight of the connecting member can be reduced, further suppressing weight increase and reducing the weight. Make it possible.

According to the eighth aspect of the present invention, in addition to the effects of any one of the first to seventh aspects, when the inner part of the cable is operated by operating the operating part, each of the members supported by the connecting member via the inner and outer parts. The bell crank rotates and the lock pin can be moved. As a result, the lock pin can be freely fitted into and removed from the lock hole, and the slide adjustment and the locking by fitting the lock pin into the lock hole can be reliably performed.

According to the ninth aspect of the invention, in addition to the effects of any one of the first to seventh aspects, the locking of the connecting member to the slide rail and the transmission of the load input to the connecting member are close to the inner diameter of the lock hole. This can be done with a thick pin of diameter. Further, by operating the bracket movably, the thick pin and the thin pin can be integrally moved in the axial direction to release the lock. In the lock operation, the thin pin with a long insertion length is inserted into the lock hole first by the rotation of the bracket in the opposite direction, and it is easily positioned by the easy fitting of the thin pin into the lock hole. As a result, the thick pin faces the lock hole in a positioning state via the bracket. Therefore, by further rotating the bracket as it is, the thick pin can easily fit into the lock hole, and can be securely and easily fitted.

According to the tenth aspect of the present invention, in addition to the effect of the ninth aspect, the insertion length of the thin pin into the lock hole is obtained by changing the mounting position of the thick pin and the thin pin formed at the same length. Can be made longer than that of the thick pin, the leading insertion of the thin pin into the lock hole can be reliably performed, and more reliable positioning can be performed.

In the eleventh aspect, the ninth or tenth aspect is provided.
In addition to the effect of the invention, the positioning of the lock pin with respect to the lock hole can be performed by inserting the central thin pin into the lock hole, and the lock on the slide rail of the connecting member and the longitudinal load acting on the connecting member And the moment load can be received when the thick pins arranged on both sides of the thin pin are fitted in the lock holes, and the positioning of the lock pin, locking and load absorption can be performed reliably, The size and weight increase are more reliably suppressed, and the weight can be reduced.

According to the twelfth aspect, the ninth or tenth aspect is provided.
In addition to the effects of the invention, positioning of the lock pin with respect to the lock hole can be easily performed by fitting the fine pin into the lock hole. In addition, the load in the front-rear direction applied to the connecting member can be received by the shear force of the thick pin and the stress around the lock hole by fitting the thick pin into the lock hole. Further, the moment load acting on the connecting member can be received by the shear force of the fine pin and the stress around the lock hole when the fine pins arranged on both sides of the thick pin fit into the lock hole. Therefore, the positioning of the lock pin and the locking of the connecting member to the slide rail can be reliably performed. Further, the load in the front-rear direction and the moment load acting on the connecting member can be reliably received by the thick pin and the thin pin fitted in the lock holes. For this reason,
An increase in the size and weight of the seat slide rails and the like are more reliably suppressed, and the weight can be reduced.

According to the thirteenth aspect, in addition to the effects of any one of the first to seventh aspects, the load in the front-rear direction and the moment load acting on the connecting member can be reduced by fitting the lock pin into the lock hole. It can be reliably received by the shearing force of the pin and the stress around the lock hole. When the lock pin is inserted into and removed from the lock hole, the check pin can be engaged and disengaged from the check hole of the connecting member via the biasing force of the check spring, and the lock pin can be reliably positioned with respect to the lock hole. It is possible to perform a reliable fitting and removing operation.

According to the fourteenth aspect, in addition to the effects of any one of the first to seventh aspects, the forward load acting on the connecting member is limited by the shearing force of the lock pin located on the front side and the vicinity of the lock hole. The rearward load can be received by the shear force of the lock pin located on the rear side and the stress around the lock hole. Further, the moment load acting on the connecting member can be reliably received by the stress and the shearing force of the lock pin while dispersing the stress by each lock pin biting into the notch of each lock hole. Therefore, the connecting member can be securely locked to the seat slide rail, and the longitudinal load and the moment load acting on the connecting member can be reliably received by the shear force of the lock pin and the stress around the lock hole. Can be
An increase in the size and weight of the seat slide rail is more reliably suppressed, and the weight can be reduced.

According to the fifteenth aspect, in addition to the effects of any one of the first to seventh aspects, it is possible to secure a large clearance between the lock pin and the lock hole during normal use, and to lock a plurality of lock pins. It can be reliably and easily inserted into the hole. In addition, when a load is input, the contact area can be increased due to the longitudinal shape and the moment load applied to the connecting member by the oval shape of the lock pin and the lock hole, and the shear force of the lock pin and the stress state around the lock hole can be increased. And the load in the front-rear direction and the moment load can be appropriately received. Therefore, the increase in the size and weight of the seat slide rail can be suppressed more reliably, and the weight can be reduced.

According to the sixteenth aspect, in addition to the effects of any one of the first to seventh aspects, a large clearance is ensured by fitting the lock pin into a large curvature portion of the lock hole during normal use. And a plurality of lock pins can be reliably and easily inserted into each lock hole. When a load is input, the lock pin is fitted at the lock hole formed with the same curvature as the outer shape of the lock pin, so that the contact area between the lock pin and the lock hole can be increased, and the load and moment in the front-rear direction can be increased. The load can be properly received by the shear force of the lock pin and the stress around the lock hole. Therefore, the increase in the size and weight of the seat slide rail can be suppressed more reliably, and the weight can be reduced.

According to the seventeenth aspect of the present invention, in addition to the effects of any one of the first to sixteenth aspects, the longitudinal load acting on the connecting member, the moment load, and the shear force of the lock pin are applied to the vertical wall of the seat slide rail. The load can be received more properly and reliably in a state of high rigidity. Therefore, the increase in the size and weight of the seat slide rail can be suppressed more reliably, and the weight can be reduced.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 10 show a first embodiment of the present invention. First, FIG. 1 is a perspective view showing a frame structure of a seat to which a first embodiment of the present invention is applied, and FIG. 2 is a side view of the same. As shown in FIGS. 1 and 2, the seat S includes a seat cushion 1 and a seat back 3 as in the case of FIG. 40. The seat cushion 1 forms a seating surface, and the seat back 3 forms a backrest surface. ing. In FIGS. 1 and 2, pads and springs are not shown in both the seat cushion 1 and the seat back 3, but they are of course arranged in practical use.

The seat back 3 is connected to a reclining device 7 as a connecting member on both lower sides of the seat back frame 5 by connecting portions 17. In addition,
1 and 2 show only the reclining device 7 on the left side. The joint 17 is a rotation axis of the reclining device 7, and the seat back frame 5 can be rotated around the joint 17 by a reclining operation.

The left and right reclining devices 7 are each formed symmetrically, and each has a slider 19. The slider 19 is slidably supported in the front-rear direction by rear slide rails 21 as left and right slide rails. The left and right reclining devices 7 are provided at any slide position of the rear slide rail 21 by the two lock pins 23 and the lock holes 25 provided in the slider 19 in the front and rear directions in the sheet sliding direction being removably fitted. The lock pin 23 and the lock hole 25 receive the load from the reclining device 7 while being positioned.

Although the specific mounting structure of the lock pin 23 will be described later, the number of the lock pin 23 is only required to be at least two before and after the seat sliding direction, and is two or more, for example, three or four. It is also possible to
The plurality of lock holes 25 are provided at regular intervals along the rear slide rail 21. Two lock pins 23 for positioning the connecting member 7 are provided before and after the connecting portion 17 of the seat back 3 with respect to the connecting member 7. That is, in FIG. 2, the perpendicular S to the floor surface lowered from the connecting portion 17 to the rear slide rail 21 is:
The structure passes between the lock pins 23, and the lock pins 2
In the present embodiment, the coupling portion 17 is disposed slightly closer to the lock pin 23 on the rear side in the front-rear positional relationship with the lock pin 23. However, the position of the connecting portion 17 is changed to the front and rear lock pins 23.
May be arranged at the front and rear center. The connecting member 7 is connected to the connecting portion 1 when the slider 19 is viewed from the side in FIG.
The lower part from 7 is formed in a divergent shape gradually expanding back and forth. The lock pins 23 can be detached from the lock holes 25 by operating an operation unit 29 attached to the end of the cable 27.
The operation section 29 is supported by an operation section support bracket 69, and the operation section support bracket 69 is fixed to a lower portion of the front end of the cushion frame 11 by welding, screwing, or the like.

The seat cushion 1 has a front portion supported on the floor side and a rear portion supported by the connecting member 7. Specifically, the seat cushion 1 includes a cushion frame 11 having a rectangular frame shape.
A front slide rail 31 as a slide rail is provided on each of the left and right sides of 1. However, in FIGS. 1 and 2,
Only the left front slide rail 31 is indicated by a broken line,
Illustration of the right front slide rail is omitted.

A roller 33 is incorporated in the front slide rail 31, and the roller 33 is supported by a roller bracket 35 fixed to the vehicle body floor side in an upright state. Accordingly, the cushion frame 11 of the seat cushion 1 can move forward from the position shown in FIG. 2 by the front slide rail 31 sliding forward with respect to the roller 33. Therefore, the seat cushion 1
Has a configuration in which a front portion is supported slidably back and forth on the floor side via a slide rail 31 and a roller 33. In the seat cushion 1, brackets 37 are fixed to both sides of the rear portion of the cushion frame 11. However, FIGS. 1 and 2 show only the left bracket 37. The bracket 37 is supported by the slider 19 of the connecting member 7 via a connecting pin 39.
Accordingly, the rear portion of the seat cushion 1 is supported by the connecting member 7 via the connecting pin 39.

FIGS. 3 to 5 show the mounting structure of the lock pin 23 and the structure of the detaching operation. FIG. 3 shows the rear slide rail 21 outside the right seat in the vehicle width direction.
FIG. 9 is an enlarged perspective view showing support of the slider 19 with respect to FIG.
Outside the vehicle width direction, the rear slide rail 21 is fixed to the vertical wall 41a of the side sill 41, which is the vehicle body side, by welding, a bolt nut, or a rivet. On the inner side in the vehicle width direction, the rear slide rail 21 is similarly fixed to a vertical wall or the like of a vehicle body tunnel, though not shown. Since the basic structure is symmetrical on both sides, the structure on the outside in the vehicle width direction in FIG. 3 will be described, and the description on the opposite side will be omitted. FIG. 4 is a cross-sectional view of a portion of the lock pin, and FIG. 5 is a plan view including a detachment operation structure.

First, as shown in FIGS. 3 and 4, the cross section of the rear slide rail 21 is formed into a channel material.
It has a vertical wall 43 extending substantially vertically. The vertical wall 43 of the rear slide rail 21 is
Butted against the first vertical wall 41a and welded as described above,
It is firmly fixed by bolts and nuts. Vertical wall 4
A lock wall 45 protruding inward is provided at the upper and lower intermediate portion of the lock 3, and the lock holes 25 are provided along the lock wall 45 at predetermined intervals in the front-rear direction.

On the other hand, a sliding portion 47 is integrally provided at the lower end of the slider 19. The sliding portion 47 is provided on one side of the lower end portion of the slider 19 along the front-rear direction, and is formed in a plate shape facing the lock wall 45 of the vertical wall 43 of the rear slide rail 21. Guide portions 49a and 49b enlarged corresponding to the inner surface width are provided. Therefore, the sliding portion 47 of the slider 19 is configured to be guided along the rear slide rail 21.

A pair of front and rear support holes 51 in the sliding direction are provided at the lower portion of the slider 19, and the lock pins 23 are fitted and supported in the respective support holes 51 so as to be movable in the axial direction. Therefore, the lock pin 23 is supported by the connecting member 7 so as to be movable in the axial direction, and
It can be freely attached to and detached from.

Referring also to FIG. 5, on the outer surface of the lower end of the slider 19, bell cranks 53 and 55 corresponding to the lock pins 23 are rotatably supported. The pair of bell cranks 53 and 55 are formed in a symmetrical shape, and each of the intermediate portions is rotatably supported by a bracket 59 by a pin 57. The bracket 59 is welded to the slider 19,
It is fixed by bonding, screwing, or the like. Each lock pin 23 is rotatably connected to one end of each of the bell cranks 53 and 55. That is, the bell crank 5
Elongated holes 53a, 55a are provided at one end of 3, 55, and pins 59 attached to the lock pins 23 are fitted into the elongated holes 53a, 55a.

On the lower outer surface of the slider 19, a pin case 61 corresponding to each lock pin 23 is fixed by welding or the like, and between the pin case 61 and a stopper flange 23a provided in the middle of the lock pin. , A return spring 63 is interposed. The return spring 63 urges the stopper flange 23 a against the pin case 61, and urges the lock pin 23 in a direction in which the lock pin 23 is fitted into the lock hole 25.

The other end of each of the bell cranks 53 and 55 is separately connected to one end of an inner 65 and an outer 67 of the cable 27. That is, each bell crank 5
The other ends of the wire connection portions 53b, 55
b is projected, and the inner 65 is connected to the wire connecting portions 53b, 55.
b, and a nut portion 65a screwed to the tip of the inner 65 is engaged with one of the wire connecting portions 53b.
The end of the outer 67 abuts against the surface of the other wire connecting portion 55b. The other end of the outer 67 is supported so as to abut on the operation part support bracket 69 which is a fixed part on the operation side, and the other end of the inner 65 protrudes from the other end of the outer 67 through the operation part support bracket 65. , The operation unit 29 is attached. Bell crank 55
The cable 27 is arranged slightly curved as shown in FIG. 5 between the cable coupling portion 55b and the operation portion support bracket 69, and the length thereof is longer than the distance between the wire coupling portion 55b and the operation portion support bracket 69. It is getting longer.

Next, the operation of the above structure will be described with reference to FIGS. 6 is an explanatory view showing a load state, FIG. 7 is a side view showing a moment state, and FIG.
FIG. 9 is a cross-sectional view illustrating a stress state around the lock hole, FIG. 9 is a plan view illustrating a lock release operation state, and FIG. 10 is a perspective view illustrating a frame structure of the seat S.

As shown in FIG. 6 and FIG. 7, when the occupant is seated on the seat S, the load F1 applied to the rear of the seat back 3 at the time of a rear collision of the vehicle is applied to the seat back frame 5 of the seat back 3. On the other hand, a moment 71 is generated such that the lower portion becomes larger. Note that the seat 73 generates a moment 73 in the cushion frame 11 of the seat cushion 1 where the center between the front and rear support points becomes large due to the load F2 due to the weight.

The rearward load F1 is transmitted to the connecting member 7 below the seat back frame 5, and the connecting member 7
, The load in the front-rear direction and the moment load are transmitted to the slider 19. The load is applied to the front and rear 2
The power is transmitted to the rear slide rail 21 from the lock holes 25 into which the lock pins 23 fit via the lock pins 23. At this time, since the rear slide rail 21 is fixed to the vertical wall 41a of the side sill 41 on the vehicle body side, the vertical wall set in the tunnel portion, and the like in the front-rear direction, a bending moment is generated in the rear slide rail 21. Never. Further, since the cushion frame 11 is supported by the slider 19 via the coupling pins 39 of the coupling bracket 37, the cushion frame 1
1, the connecting pin 39
A bending moment does not act on the cushion frame 11 due to relative rotation occurring around it or deformation of the coupling bracket 37.

That is, the lock pin 2 is moved by the load F1.
3 is pressed against the lock hole 25, so that the front lock pin 23 receives a downward reaction force f1 and the rear lock pin 23 receives an upward reaction force f2 as shown in FIG. The reaction forces f1 and f2 are received as a shearing force of the lock pin 23, and a stress σ1 is generated mainly around the lock hole around the front lock pin 23 by the pressing force from the lock pin 23 around the lock hole 25. Yields
On the rear lock pin 23 side, a stress σ2 is generated mainly on the lower side around the lock hole 25. These stresses σ
1 and σ2 become small when the lock pin 23 having a circular cross section and the lock hole 25 having a circular shape come into contact with a wide contact surface with slight deformation, and are reduced in the plane of the vertical wall 43 of the rear slide rail 21. It can be dispersed as stress. Therefore, no load is applied to any part of the rear slide rail 21 that gives a bending deformation that is weak in strength design. Similarly, the longitudinal load transmitted to the slider 19 can be received by the shearing force of the lock pin 23 and the stress around the lock hole 25.

In locking, the lock pin 23 is vertically engaged with the vertical wall 23 of the rear slide rail 21. Therefore, a load that causes the upper and lower walls of the rear slide rail 21 to be opened and deformed vertically. Never work. When the lock pin 23 is pulled out from the lock hole 25 to release the lock, the load F2 is applied to the coupling bracket 37,
The sliding portion 47 of the rear slide rail 21 supports the load F2 transmitted to the coupling pin 39 and the slider 19 and abutting against the lower wall portion 44b (FIG. 4), and the upper wall portion 44a (FIG. 4) When the sliding portion 47 abuts due to vibration, it supports it. For this reason, the rear slide rail 21 only needs to have sufficient strength to withstand these loads. Therefore, the upper wall portion 44a other than the vertical wall 43 shown in FIG.
And the portion of the lower region 79 including the lower wall portion 44b can be made thinner.

For the above reasons, the overall size and weight of the rear slide rail 21 can be largely suppressed, and the weight can be reduced. As shown in FIG. 8, when the reinforcing portion 75 is specially provided around the lock hole 25,
The surroundings can be more efficiently dispersed.
When the reinforcing portion 75 is provided in this manner, the vertical wall 4
The other parts of 3 can also be made thinner, so that the weight increase can be further suppressed as a whole, and the weight can be further reduced.

When releasing the lock, as shown in FIG. 9, when the operation portion 29 is pulled, the inner 65 is pulled in the same direction, and at the same time, the outer 67 extends the curve with respect to the support bracket 69. The cranks 53 and 55 rotate around the pin 57 at the same time. With this rotation,
Lock pin 2 through pin 59 and slots 53a, 55a
3 moves in the axial direction against the urging force of the spring 63,
It will retract with respect to the lock hole 25. Due to the retraction of the lock pin 23, the lock pin 23 is released from the lock hole 25, and the lock of the slider 19 with respect to the rear slide rail 21 is released. Therefore, as shown in FIG. 10, the entire seat can be moved forward. At this time, since the left and right front side rails 31 of the seat cushion 1 are guided by the rollers 33 on the roller bracket 35, the seat cushion 1 can be smoothly moved forward.

After the movement, when the operating portion 29 is released, the return spring 63 is moved to the stopper flange 23a.
And each lock pin 23 is re-engaged with the corresponding lock hole 2.
5 and the lock is performed. At this time, the bell cranks 53 and 55 also rotate in the opposite direction to return to the original position, and the inner 65 and the outer 67 of the cable 27 are
Is restored to the original state as shown in FIG. Thus, by operating the operation unit 29, locking and unlocking by the lock pin 23 can be performed extremely easily, and the sliding operation of the sheet S can be easily performed.

Note that the locking and unlocking are not limited to the above-described structure.
It is also possible to set the solenoid fixed to the solenoid and to energize and de-energize the solenoid by button operation, thereby electromagnetically moving the lock pin 23 to perform locking and unlocking.

The rear end of the cushion frame 11 is connected to the slider 1 by a connecting bracket 37 and a connecting pin 39.
9, the front end of the front slide rail 31
Roller 3 of roller guide 35 supported on the vehicle body side through
3, the cushion frame 11 does not jump upward during running and does not have insufficient rigidity in the left-right direction. Also, front slide rail 3
Since 1 is fixed to the inside of the cushion frame 11 instead of the vehicle body side, a comfortable vehicle interior space can be secured without violating the space in front of the foot space.

FIG. 11 is a perspective view of a main part according to a modification of the first embodiment. In the present embodiment, the slider 19 is formed in an inverted T-shape in which a lower portion of the slider 19 expands back and forth with respect to the coupling portion 17. The connecting portion 17 is located at the front and rear center with respect to the front and rear lock pins 23. Therefore, when a load acts on the slider 19 from the connecting portion 17 in the same manner as described above, a couple acts on each lock pin 23, and the load can be distributed more efficiently by even load transmission. Therefore, the size of the rear slide rail 21 and the like is increased,
The increase in weight can be suppressed more reliably, and the weight can be significantly reduced.

FIG. 12 is an embodiment showing a modification of the lock release operation mechanism. In FIG. 12, the bell crank is not used. That is, FIG.
In the second embodiment, a cable 27 including an inner 65 and an outer 67 is provided for each lock pin 23, and each inner 65 is connected to each lock pin 23, and the inner 6
5 is connected to the operation unit 29 at the other end. The outer 67 of the cable 27 is engaged with the end face of the cable socket 77 fixed to the pin case 61, and the other end is in contact with the operation section support bracket 69 as described above. In this embodiment, the operation section 29 is pulled. Thereby, each inner 65 of each lock pin 23 can be directly pulled, and the lock pin 23 can be retracted with respect to the lock hole 25 to release the lock. When the operating portion is released, the lock pin 23 is locked in the lock hole 25 again by the urging force of the return spring 63.
Therefore, also in the present embodiment, the same operation and effect can be obtained. Further, in the present embodiment, since the bell crank is omitted, the structure can be simplified.

(Second Embodiment) FIGS. 13 to 18 show a second embodiment of the present invention. In this embodiment, the positioning of the lock pin with respect to the lock hole is facilitated. The components corresponding to those of the first embodiment will be described with the same reference numerals, and redundant description will be omitted.

First, FIG. 13 is a plan view of the main part, FIG. 14 is a front view of the main part, FIG. 15 is a sectional view of the main part, and FIGS.

In this embodiment, the lock pins are composed of three pins, the thick pin 79 and the thin pin 81. It is sufficient that at least three lock pins are provided, and it is possible to further increase the number of lock pins such as three or more, four or five.

The thick pin 79 has an outer diameter close to the inner diameter of the lock hole 25, and the thin pin 81 is formed to be thinner than the thick pin 79. The insertion length of the thin pin 81 in the lock hole 25 in the locked state is set longer than that of the thick pin 79. The thick pin 79 and the thin pin 81 are integrally supported by the pin support bracket 83, and are movable in the axial direction with respect to the lock hole 25 by the movable operation of the pin support bracket 83.

The thick pin 79 has a rounded chamfered tip 79a and an engagement flange 79b at the rear end for engaging with the support portion 83a of the pin support bracket 83. Also, a return spring 87 is interposed between the pin case 85 fixed to the outer surface of the slider 19 and the stopper flange 79c of the lock pin 79, and the lock pin 79 is urged in a direction to fit into the lock hole 25. . The thin pin 8
1 has a front end 81a which is chamfered into a spherical shape and a rear end provided with an engagement flange 81b which engages with the outer surface of the support portion 83b of the pin support bracket 83. The biasing structure of the thin pin 81 is the same as that of the thick pin 79, and a return spring 91 is interposed between the pin case 89 and the stopper flange 81c.

The support portions 83a and 83b have elongated holes 9
9 and 101 are provided, a thick pin 79 penetrates the long hole 99, and a thin pin 81 penetrates the long hole 101. The support portions 83a and 83b of the pin support bracket 83 are formed stepwise, and the support portion 83a is located farther from the rear slide rail 21 than the support portion 83b. Therefore,
The mounting position of the thick pin 79 on the pin support bracket 83 is
Rear slide rail 21 from the same mounting position of thin pin 81
Away from

The pin bracket 83 is rotatably supported by a bracket support 93 fixed to the slider 19 via a shaft 95. A slide lever 97 is fixed to one side of the pin bracket 83.

Also in this embodiment, when a rearward load acts on the seat back 3 at the time of a rear collision and the load is transmitted to the slider 19, each thick pin 79 hits each lock hole 25 in the same manner as described above. By contact, the longitudinal load and the moment load applied to the slider 19 can be received by the shearing force applied to the lock pin 79 and the stress around the lock hole 25 in the same manner as described above.
The large size and weight increase of the rear slide rail 21 can be largely suppressed, and the weight can be significantly reduced.

As for the unlocking operation, the operating portion (not shown) of the slide lever 97 located on the front side of the seat S is operated to push it down, and
3 is rotated about the pin 95. By this rotation, the support portion 83a pulls the engagement flange 79b of the thick pin 79 outward, and the support portion 83b pulls the engagement flange 81b of the thin pin 81 outward. As a result, the thick pin 79, against the urging force of the return springs 87 and 91,
The thin pin 81 simultaneously moves in the axial direction in a direction in which the thin pin 81 is separated from the lock hole 25. At this time, when the thin pin 81 having a long insertion length is detached from the lock hole 25, the thick pin 79 is also detached at the same time, and the lock can be released.

When the slide lever 97 is released, the return springs 87 and 91 work, and the thick pin 7 is released.
9. The thin pin 81 moves axially in the direction in which it is fitted into the lock hole 25. At this time, the thick pin 79
Is slightly displaced from the lock hole 25, the positioning is performed by inserting the thin pin 81 having a small diameter into the lock hole 25, and the thick pin 79 is inserted into the lock hole 25 by the return spring 87. It can be easily fitted by the urging force. That is, even if the thin pin 81 is fitted to one side in the lock hole 25 with a bias, the thick pin 7
The roundness of the tip 79 a of 9 is applied to the taper 25 a of the lock hole 25, and the lock pin 79 can be automatically fitted into the lock hole 25 by the biasing force of the guide of the tip 79 a and the taper 25 a and the return spring 87.

In positioning the lock hole 25a of the thin pin 81, the guide function between the roundness of the tip 81a and the taper 25a of the lock hole 25 and the return spring 9
The thin pin 81 can be easily positioned and fitted into the lock hole 25 by the urging force of 1.

Thus, the lock hole 25 of the thick pin 79 is
The operation of releasing the lock and the operation of locking can be performed very easily.

(Third Embodiment) FIGS. 19 to 24 show a third embodiment of the present invention. FIG. 19 is a plan view of a main part,
20 is a front view of an essential part, FIG. 21 is a sectional view of an essential part, and FIGS. The structure of the third embodiment is as follows.
The structure is basically the same as that of the second embodiment.
Therefore, components corresponding to those of the second embodiment will be described with the same reference numerals, and redundant description will be omitted.

On the other hand, in the present embodiment, the lock pin of the second embodiment has two thick pins 79 and a thin pin 81 between the thick pins 79. And three thin pins 81 are arranged on both sides of the thick pin. Therefore, in the present embodiment, the longitudinal load acting on the slider 19 can be received by the shearing force of the thick pin 79 and the stress around the lock hole 25, and the moment load acting on the slider 19 is reduced by the shearing force of the thin pins 81 on both sides. It can be received by the force and the peripheral stress when the thin pin 81 contacts the lock hole 25. Therefore, also in the present embodiment, it is possible to significantly suppress the increase in the size and the weight of the rear slide rail 21, and it is possible to significantly reduce the weight.

When the lock is released, the pin bracket 83 can be rotated about the pin 95 by pushing down the slide rod 97 in the same manner as in the second embodiment.
The thick pins 79 and the thin pins 8 are supported by the support portions 83a and 83b.
1 can be simultaneously moved in the axial direction so as to separate from the lock hole 25 against the urging force of the return springs 87 and 91.

When the slide lever 97 is released at the time of locking, the return spring 8 is released as in the second embodiment.
The thick pins 79 and the thin pins 81 are moved in the axial direction by the urging forces of the pins 7 and 91 so as to be fitted into the lock holes 25 at the same time. At this time, the thin pin 81 is inserted into the lock hole 25 first, so that the lock pin can be positioned and locked easily as in the second embodiment. In addition, in the present embodiment, since the positioning can be performed by using the two thin pins 81, the locking can be performed more easily by more reliable positioning.

(Fourth Embodiment) FIGS. 25 to 27 relate to a fourth embodiment of the present invention. FIG.
Is a front view of the main part, and FIG. 27 is a sectional view of the main part. In addition,
In the present embodiment, since the basic configuration is substantially the same as that of the second embodiment, the corresponding components will be denoted by the same reference numerals, and redundant description will be omitted.

On the other hand, in this embodiment, a check hole 103 is provided below each lock hole 25 of the slide rail 21. A check pin 105 is provided on the slider 19 of the connecting member 7 so as to be movable in the axial direction.
The check pin 105 has a spherical portion 105a at the tip, and engages with the check hole 103 at the spherical portion 105a. The check pin 105 is the bracket support 9
3 is supported through a check pin support portion 107 fixed to the support member 3, and an engagement flange portion 105b is provided at the rear end. A stopper flange 105c is provided at an intermediate portion of the check pin 105.
A return spring 109 is interposed between c and the check pin bracket 107.

Therefore, in this embodiment, the slider 1
9 can be received and dispersed by the shear force of the large pin 79 as a lock pin and the stress around the lock hole 25, and can be dispersed by receiving the load in the front-rear direction and the moment load acting on the rear slide rail 21. Significant reduction can be achieved, and significant weight reduction is also possible.

When the lock is released, the slide lever 97 is released.
By pressing down, the pin support bracket 83 can be rotated about the pin 95, and the thick pin 79 can be moved in the axial direction in a direction to separate from the lock hole 25. In this unlocked state, when the sheet S is moved in the front-rear direction, the spherical portion 1 of the check pin 105 is moved by the force.
05a inserts the check hole 103 into the return spring 109
Can be easily slid. At a predetermined sliding position, the spherical portion 105a of the check pin 107 can be easily engaged with the check hole 103 by the urging force of the check spring 109.

The engagement allows the thick pin 79 to be easily positioned with respect to the lock hole 25, so that the lock operation can be easily performed. Therefore, also in the present embodiment, the seat slide operation can be performed extremely easily.

(Fifth Embodiment) FIGS. 28 to 35 relate to a fifth embodiment of the present invention. FIG. 28 is a front view of a main part, and FIG.
31 to 31 are partially cutaway front views showing the relationship between lock pins and lock holes having different engagement positions, and FIGS. 32 to 35 are partially cutaway views showing the relationship between lock pins and lock holes for explaining stress states. It is an enlarged front view. In this embodiment, the basic structure is the same as that of the second embodiment.
Corresponding components will be described with the same reference numerals, and redundant description will be omitted.

On the other hand, in this embodiment, the lock holes 2
5 is formed in an elongated hole whose vertical dimension is close to the outer diameter of the lock pin 79, and whose longitudinal dimension in the slide is approximately twice the outer diameter of the lock pin 79. In addition, four notches 111 shorter than the radius of the lock pin 79 are provided at approximately the same distance as the radius of the lock pin 79 from the end of the lock hole 25 in the slide front-rear direction.

The lock release and lock of this embodiment are as follows.
By pushing down the slide lever 97 as in the second embodiment, the pin support bracket 83 is rotated about the pin 95, and after the slide movement, the slide lever 9 is moved.
By releasing the lock 7, the lock pin 79 can be fitted into the lock hole 25 again by the urging force of the return spring, and the lock state can be established. Lock hole 25 of lock pin 79
For example, by moving the notch by one notch, the fitting state shown in FIG. 29 can be changed to the fitting state shown in FIGS.

With respect to the longitudinal load acting on the slider 19, in the state shown in FIG. 29, the forward load is applied to the shear force of the lock pin 79 by the front lock pin 79 abutting against the front wall of the front lock hole 25. It can be received by the stress around the hole 25 at that position, and the rear load can be similarly received by the rear lock pin 79 abutting against the rear wall of the rear lock hole 25. In the locked state of FIG. 30, the front lock pin 79 abuts on the rear wall of the front lock hole, and the rear lock pin 79 abuts on the front wall of the rear lock hole where one is placed. Can be received.

The moment load acting on the slider 19 is such that the notch is not provided as shown in FIG. 32, and if the lock hole 25 is merely a long hole, the lock pin 79 is locally brought into contact with the upper wall of the lock hole 25. As a result, stress concentration occurs, resulting in poor load transmission efficiency. On the other hand, in the embodiment of the present invention, when a moment load is applied, the front lock pin 79 moves upward as shown in FIGS. It will come into wide contact with the wall. Therefore, stress can be dispersed around the lock hole 25, and efficient load transmission can be performed. Also, the rear lock pin 79
Moves downward by the moment load, and similarly pushes the corresponding notch 111 on the lower side to open, and the stress can be dispersed by the similar state.

Therefore, an increase in the size and weight of the slide rail 21 can be greatly suppressed, and a significant reduction in weight can be achieved. Further, since the lock hole 25 is a long hole, when the lock pin 79 is locked in the lock hole 25 again after the lock is released, the lock pin 79 can be securely and easily locked.

(Sixth Embodiment) FIGS. 36 and 37 relate to a sixth embodiment of the present invention. FIG. 36 is a front view of a main part, and FIG. 37 is a partially cutaway enlarged front view showing a relationship between a lock hole and a lock pin. FIG. In this embodiment, since the basic structure is the same as that of the second embodiment, the corresponding components will be denoted by the same reference numerals, and redundant description will be omitted.

On the other hand, in the present embodiment, each lock hole 25 is formed as an elongated elliptical hole extending vertically, and the lock pin 79 is formed in a similar cross section with an outer diameter smaller than the inner diameter of each lock hole 25. I have.

The lock release and lock of the lock pin 79 of the present embodiment with respect to the lock hole 25 can be performed by operating the slide lever 97. At this time, since the lock pin 79 is formed in a similar cross section with an outer diameter smaller than the lock hole 25, it is possible to reliably and easily insert the lock pin 79 into the lock hole 25 for locking.

As shown in FIG. 37, for example, the front lock pin 7
9, the upper side of the lock pin 79 comes into contact with the upper side of the lock hole 25 over a wide range. Although not shown, the rear lock pin 79 moves downward to lock the lock hole 25. Abuts the lower side similarly. Thus, the lock pin 79 and the lock hole 25
The contact area can be increased by the elliptical cross-section, and the moment load can be properly received by the shearing force of the lock pin 79 and the stress around the lock hole 25. Similarly, although not shown, the lock pin 79 abuts on the lock hole 25 over a wide range due to an increase in the contact area due to the elliptical shape even in the front-rear direction load. It can be properly received with stress.

Therefore, as described above, the increase in size and weight of the slide rail 21 can be significantly suppressed, and the weight can be significantly reduced.

(Seventh Embodiment) FIGS. 38 and 39 relate to a seventh embodiment of the present invention. FIG. 38 is a front view of a main part, and FIG.
FIG. 4 is a partially cutaway enlarged front view showing a relationship between a lock hole and a lock pin. In this embodiment, since the basic structure is the same as that of the second embodiment, the corresponding components will be denoted by the same reference numerals, and redundant description will be omitted.

On the other hand, in this embodiment, the lock holes 2
A plurality of reference numerals 5 are provided on the vertical wall 43 of the rear slide rail 21 at predetermined intervals along the sliding direction and in two upper and lower stages. Each upper lock hole 25 has a lock pin 7
9 has the same curvature as the outside diameter, and the lower part is formed in a long hole inclined slightly backward as a whole with a larger curvature than the upper part. Each lower lock hole 25 has the same shape as the upper lock hole 25 and is arranged upside down. Further, the front and rear lock pins 79 are provided with the pin support bracket 83 similarly to the second embodiment.
The lock pin 79 on the front side is fitted in the lock hole 25 on the upper side, and the lock pin 79 on the rear side is fitted in the lock hole 25 on the lower side.

Therefore, when the lock pin 79 is unlocked from the lock hole 25 by the operation of the slide rod 97 and is locked again, the lock pin 79 has a large curvature in any of the upper and lower lock holes. Since the fitting is performed, a large clearance can be secured, and the plurality of lock pins 79 can be securely and easily fitted into the plurality of lock holes 25. Therefore, the operation of unlocking and locking can be easily performed, and the seat slide operation can be performed extremely easily.

When a longitudinal load and a moment load are applied to the slider 19, the front lock pin 79 moves upward and the rear lock pin 79 moves downward as shown in FIG. The curvature of the lock hole 25 moves to the smaller one to make contact therewith, and the contact area of the lock pin 79 with the lock hole 25 can be increased. Therefore, the load can be properly received by the shearing force of the lock pin and the stress around the lock hole, and the increase in the size and weight of the rear slide rail 21 can be significantly suppressed, and the weight can be significantly reduced. It is possible.

In each of the above embodiments, it is also possible to provide a structure in which a plurality of lock pins are provided on the slide rail side and a lock hole is provided in the slider. In such a case, it is possible to adopt a configuration in which either the lock hole side or the lock pin is locked and unlocked.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat according to a first embodiment of the present invention with a cushion omitted.

FIG. 2 is a side view of the seat according to the first embodiment with a cushion omitted.

FIG. 3 is a perspective view of a main part according to the first embodiment.

FIG. 4 is a cross-sectional view showing a relationship between a slider and a rear slide rail according to the first embodiment.

FIG. 5 is a plan view showing a lock release mechanism according to one embodiment.

FIG. 6 is an explanatory diagram showing a load state according to the first embodiment.

FIG. 7 is a side view showing a moment state according to the first embodiment.

FIG. 8 is a cross-sectional view showing a stress state around a lock hole according to the first embodiment.

FIG. 9 is a plan view showing a lock release operation state according to the first embodiment.

FIG. 10 is a side view after a seat slide operation according to the first embodiment.

FIG. 11 is a perspective view of a main part according to a modification of the first embodiment in which the shape of the slider is changed.

FIG. 12 is a sectional view of a main part according to a modification of the first embodiment in which the operation mechanism is changed.

FIG. 13 is a plan view of a main part according to a second embodiment of the present invention.

FIG. 14 is a front view of a main part according to the second embodiment.

FIG. 15 is a sectional view of a main part according to a second embodiment.

FIG. 16 is a plan view of a locked state according to the second embodiment.

FIG. 17 is a plan view of a positioning state according to the second embodiment.

FIG. 18 is a plan view of the unlocked state according to the second embodiment.

FIG. 19 is a plan view of essential parts according to a third embodiment of the present invention.

FIG. 20 is a front view of a main part according to a third embodiment.

FIG. 21 is a sectional view of a main part according to a third embodiment.

FIG. 22 is a plan view of the locked state according to the third embodiment.

FIG. 23 is a plan view of a positioning state according to the third embodiment.

FIG. 24 is a plan view of the unlocked state according to the third embodiment.

FIG. 25 is a plan view of a main part according to a fourth embodiment of the present invention.

FIG. 26 is a front view of a main part according to a fourth embodiment.

FIG. 27 is a sectional view of a main part according to a fourth embodiment.

FIG. 28 is a front view of a main part according to a fifth embodiment of the present invention.

FIG. 29 is a partially cutaway front view showing a fitting state of a lock hole and a lock pin of a rear slide rail according to the fifth embodiment.

FIG. 30 is a partially cutaway front view showing another fitting state of the lock pin to the lock hole of the rear slide rail according to the fifth embodiment.

FIG. 31 is a partially cutaway front view showing another fitting state of the lock pin to the lock hole of the rear slide rail according to the fifth embodiment.

FIG. 32 is a partially cut-away enlarged front view showing a state where a lock pin is fitted into a lock hole having no cut according to the fifth embodiment.

FIG. 33 is a partially cut-away enlarged front view showing a fitting state of a lock pin with a notched lock hole according to the fifth embodiment.

FIG. 34 is a partially cut-away enlarged front view showing a state where the lock pin has begun to bite into the cut in the fifth embodiment.

FIG. 35 is a partially cutaway enlarged front view of the fifth embodiment with a lock pin biting into a cut.

FIG. 36 is a front view of an essential part according to a sixth embodiment of the present invention.

FIG. 37 is a partially cut-away enlarged front view showing a fitted state of a lock hole and a lock pin according to the sixth embodiment.

FIG. 38 is a front view of a main part according to a seventh embodiment of the present invention.

FIG. 39 is a partially cut-away enlarged front view showing a state where a lock pin is fitted into a lock hole according to the seventh embodiment.

FIG. 40 is a side view according to a conventional example.

FIG. 41 is an explanatory diagram showing a load state and a moment distribution.

FIG. 42 is an explanatory diagram showing a deformation of the seat slide rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat cushion 3 Seat back 5 Seat back frame 7 Connecting member 11 Cushion frame 17 Connecting part 19 Slider (connecting member) 21 Rear slide rail (slide rail) 23 Lock pin 25 Lock hole 27 Cable 29 Operating part 31 Front slide rail (Slide) Rail) 33 roller 35 roller bracket 39 connecting pin 43 vertical wall 47 sliding part 53, 55 bell crank 63 return spring 65 inner 67 outer 79 thick pin (lock pin) 81 thin pin (lock pin) 87, 91 return spring 103 check Hole 105 Check pin 109 Check spring 111 Cut S sheet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomoyuki Kitazaki 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Inside Nissan Motor Co., Ltd. (72) Inventor Kazuto Kato 2 Takara-cho, Kanagawa-ku, Yokohama City, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Masahiro Egami 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture, Nissan Motor Co., Ltd. (72) Inventor Akinari Hirao 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Nissan Motor Co., Ltd. F-term (reference) 3B087 BA02 BB07 BC05 CD02

Claims (17)

[Claims] 1. A seat cushion that forms a seating surface and a seatback that forms a backrest surface, and a lower portion of the seatback is connected to a connecting member slidably supported in a front-rear direction on a slide rail on a vehicle body side. The seat cushion is a seat having a front portion supported on the floor side and a rear portion supported by the connecting member;
A seat characterized in that the lock pin and the lock hole are detachably fitted to each other so that the lock pin is positioned at an arbitrary slide position of the slide rail, and a load from a connecting member is received by the lock pin and the lock hole. 2. The seat according to claim 1, wherein a front portion of the seat cushion is supported slidably back and forth with respect to a floor via a slide rail and a roller. 3. The seat according to claim 1, wherein a front portion of the seat cushion is slidably supported on the floor side via a sliding mechanism, and a rear portion of the seat cushion is connected to the connecting member via a connecting pin. A sheet characterized by being supported. 4. The seat according to claim 1, wherein each lock pin for positioning the connecting member is located before and after a connecting portion of a seat back with respect to the connecting member. Characteristic seat. 5. The seat according to claim 4, wherein the connecting portion is located at the front and rear center with respect to the front and rear lock pins. 6. The sheet according to claim 4, wherein the connecting member is formed in a divergent shape such that a lower portion of the connecting member gradually expands back and forth. 7. The sheet according to claim 4, wherein the connecting member is formed in an inverted T-shape in which a lower portion of the connecting member expands back and forth. 8. The seat according to claim 1, wherein a plurality of the lock holes are provided in the slide rail at a predetermined interval along a slide direction, and the lock pin is connected to the connection member. The bell member is rotatably supported in the connecting member so as to be rotatable in correspondence with each of the lock pins. Each of the lock pins is rotatably connected, and the other end of each of the inner and outer cables of the inner and outer cables is separately connected to the other end, and the other end of the outer cable is connected to a fixed portion on the operation side. And an operating portion attached to the seat such that the inner end of the seat protrudes from the other end of the outer. 9. The seat according to claim 1, wherein a plurality of the lock holes are provided on the slide rail at predetermined intervals along a sliding direction, and the lock pin is a lock hole. A pin support bracket provided with at least three large pins having an outer diameter close to the inner diameter of the pin and a thin pin smaller than the thick pin and having a longer insertion length into the lock hole than the thick pin, and movably supported by the connecting member; A seat, which is mounted on the body and supported integrally and freely movable in the axial direction. 10. The seat according to claim 9, wherein the thick pin and the thin pin are formed to have the same length, and the mounting position of the thick pin on the pin support bracket is the same as that of the thin pin. A seat further away from the slide rail than a position. 11. The seat according to claim 9, wherein three of the lock pins are provided, and the thin pins are arranged at the center and the thick pins are arranged on both sides of the thin pins. Sheet. 12. The seat according to claim 9, wherein three lock pins are provided, and the thick pin is disposed at the center and the thin pins are disposed on both sides of the thick pin. Sheet. 13. The seat according to claim 1, wherein a plurality of the lock holes are provided in the slide rail at predetermined intervals along a sliding direction, and the lock pin is connected to the connection pin. A check hole is provided below each lock hole of the slide rail, and the check hole is provided below the lock hole of the slide rail. A seat provided with a check pin which is supported so as to be axially movable in the same direction as the pin and whose leading end spherical portion is engaged with the check hole by the bias of a check spring. 14. The seat according to claim 1, wherein a plurality of the lock holes are provided in the seat slide rail at predetermined intervals along a slide direction, and the lock pin is provided in the seat slide rail. The lock hole is supported by the connecting member so as to be freely movable in the axial direction. The lock hole has a vertical dimension close to the outer diameter of the lock pin, and a slide front-rear dimension is about twice as long as the lock pin. A seat, wherein four cuts shorter than the radius of the lock pin are provided at a distance of a radius of the lock pin from an end in the front-rear direction. 15. The seat according to claim 1, wherein a plurality of the lock holes are provided in the slide rail at predetermined intervals along a slide direction, and the lock pin is connected to the connection pin. Each of the lock holes is formed in a vertically elongated elliptical elongated hole, and the lock pin is formed in a similar cross section with an outer diameter smaller than the inner diameter of each lock hole. A sheet characterized by the following. 16. The seat according to claim 1, wherein a plurality of said lock holes are provided in said slide rail at predetermined intervals along said sliding direction and at two upper and lower levels, and each of said upper rows is provided with said lock holes. The lock hole has an upper portion having the same curvature as the outer diameter of the lock pin, and the lower portion has a curvature larger than that of the upper portion and is formed as a long hole slightly inclined rearward as a whole. The seat according to claim 1, wherein the front and rear lock pins are supported by the connecting member so as to be movable in the axial direction, and respectively fit into the upper and lower lock holes. 17. The seat according to claim 1, wherein the slide rail has a vertical wall extending in a vertical direction, and the connecting member is fitted to the slide rail. A sheet having a sliding portion guided while being opposed to the vertical wall.