JP4916153B2 - Mounting structure for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat mounting structure that has a fixing means for fixing a vehicle seat at an arbitrary position and retracts the seat in the event of a frontal collision of the vehicle.

  Conventionally, as a vehicle seat mounting structure, as shown in FIG. 15, a lower rail 3 is provided on a floor 2 so as to extend in the vehicle traveling direction, and an upper rail 6 is attached to a seat cushion 4 a so as to face the lower rail 3. Installation of a vehicle seat for fixing the upper rail 6 to the lower rail 3 movably in the front-rear direction via a fixing means 7 for fixing and fixing the seat 4 at an arbitrary position and a retreat means 8 for retreating the seat 4 at the time of a frontal collision The structure is known (for example, refer to Patent Document 1). The seat fixing means 7 in this mounting structure has a first auxiliary rail 7a having the same length as that of the upper rail 6 attached to the upper rail 6 so as to be movable in the front-rear direction, and a hole (not shown) along the longitudinal direction of the first auxiliary rail 7a. An attached plate is attached, and an L-shaped adjustment handle 7c is attached to the upper rail 6 so as to be rotatable along the longitudinal direction of the upper rail 6 and with the axis as a center of rotation. A base end of a claw member that can be inserted into the adjustment handle 7c is fixed to the adjustment handle 7c, and a coil spring that rotates the adjustment handle 7c in a direction in which the tip of the claw member is inserted into the square hole is wound around the adjustment handle 7c. Has been disclosed. In this seat fixing means, the seat 4 can be fixed at an arbitrary position in the front-rear direction of the vehicle by arbitrarily selecting a square hole into which the tip of the claw member is inserted.

On the other hand, the seat retracting means 8 is attached to the lower rail 3 such that the second auxiliary rail 8a having the same length as the lower rail 3 is movable in the front-rear direction, and the second auxiliary rail 8a is attached to the first auxiliary rail 7a of the seat fixing means 7. And an elastic body 8b that urges the upper rail 6 in the forward direction, and a plurality of locked portions 8c are provided on the lower rail 3, and can be selectively locked to the locked portions 8c. A locking tool 8d that allows the upper rail 6 to move back against the urging force of the elastic body 8a and prevents the upper rail 6 from moving forward by the elastic force of the elastic body 8b is provided. In the seat retracting means 8, when a rearward load of a predetermined value or more acts on the seat cushion 4a due to the frontal collision of the vehicle and the front of the vehicle entering the passenger compartment, the first and second auxiliary rails 7a and 8a The upper rail 6 moves backward against the elastic force of the elastic body 8b together with the intermediate moving member 9 so that the driver can easily escape from the collision vehicle.
JP-A-10-250435

However, in the conventional vehicle seat mounting structure, the upper rail 6 fixed to the seat cushion 4a of the seat 4 is connected to the lower rail 3 disposed on the floor 2 via the first and second auxiliary rails 7a and 8a. Since it is attached, there is a problem that the position of the seat 4 with respect to the floor 2 becomes high. That is, in the conventional vehicle seat mounting structure, the upper rail 6, the first auxiliary rail 7a, the second auxiliary rail 8a, and the lower rail 3 are interposed between the seat 4 and the floor 2 so as to overlap in the vertical direction. A roller accommodating portion is formed between the upper rail 6 and the first auxiliary rail 7a, and between the second auxiliary rail 8a and the lower rail 3, and this accommodating portion is indicated by a broken line in order to facilitate the mutual movement. A roller 7e and a roller 8e are accommodated, respectively. Therefore, the position of the seat 4 with respect to the floor 2 becomes higher due to the interposition between the seat 4 and the floor 2, and when the position of the seat 4 becomes higher, the hip point when the driver sits on the seat 4 is increased. Has changed, affecting the operability of the steering wheel and various switches on the driver's seat.
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat mounting structure in which the seat mounting position with respect to a floor is reduced from the conventional level and the operability of the steering wheel and various switches on the driver's seat is not affected.

As shown in FIGS. 1 and 10, the invention according to claim 1 is a pair of lower rails 16 a and 16 b disposed on a floor 11 a so as to extend in the traveling direction of the vehicle 10 with a predetermined interval in the vehicle width direction. A pair of upper rails 17a and 17b fixed to the seat cushion 13a of the seat 13 so as to face the pair of lower rails 16a and 16b, respectively, and attached to the pair of lower rails 16a and 16b so as to be movable in the front-rear direction. A moving member 19 attached to the lower rails 16a and 16b so as to be movable in the front-rear direction, and the moving member 19 retracts with respect to the pair of lower rails 16a and 16b when an impact force of a predetermined value or more acts on the seat 13 from the front. The moving member fixing means 30 for fixing the moving member 19 to the pair of lower rails 16a and 16b and the pair of upper arrays 17a, 17b is improved mounting structure of the vehicle seat that includes a seat fixing unit 20 that is configured to selectively secure the desired position in the longitudinal direction of the moving member 19.
The characteristic configuration is that the pair of lower rails 16a and 16b are provided with a pair of plate members 18a and 18b superposed on both sides of the moving member 19, and the pair of plate members 18a and 18b or the pair of plate members 18a and 18b are opposed to the moving member 19. A long hole 19a that is long in the front-rear direction is formed on both sides of the moving member 19, and a locking pin 14 is fixed to both sides of the moving member 19 or a pair of plate members 18a and 18b so as to face the long hole 19a. The moving member 19 is attached to the pair of lower rails 16a and 16b so as to be movable in the front-rear direction.

  In the vehicle seat mounting structure described in claim 1, both ends of the moving member 19 are superposed on a pair of plate members 18 a and 18 b provided on the lower rails 16 a and 16 b, and the moving member 19 is interposed via the locking pin 14. Is attached to the pair of lower rails 16a and 16b so as to be movable in the front-rear direction, and the seat fixing means 20 and the moving member fixing means 30 are provided to the moving member 19, so that the upper rails 17a and 17b are directly attached to the lower rails 16a and 16b. It becomes possible. Then, by attaching the upper rails 17a and 17b directly to the lower rails 16a and 16b, the mounting position of the seat 13 with respect to the floor 11a as compared with the conventional mounting structure in which the upper rail and the lower rail are attached via the first and second auxiliary rails. Can be reduced.

The invention according to claim 2 is the invention according to claim 1, wherein the moving member fixing means 30 includes a pair of locked members 31, 31 provided on the inner side of the pair of plate members 18 a, 18 b, respectively, A housing 32 provided on the moving member 19 between the pair of locked members 31, 31, and a pair of protruding tips provided on the housing 32 projecting laterally from both sides so that the base ends thereof can be immersed. A pair of locking members 33, 33 configured to be locked to the locked members 31, 31, respectively, and a pair of engagement members built in the housing 32 when an impact force of a predetermined value or more does not act on the seat 13 from the front. The base ends of the stoppers 33, 33 are not allowed to be immersed in the housing 32, and only when the impact force of a predetermined value or more acts on the seat 13 from the front, the base ends of the pair of locking members 33, 33 enter the housing 32. Immersive it It is a mounting structure of a vehicle seat that includes a locking device control unit 35 for controlling to allow.
In the vehicle seat mounting structure described in claim 2, when the vehicle 10 collides with the front, the locking device control means 35 allows the pair of locking devices 33, 33 to be immersed, and the pair of locking devices 33. , 33 is immersed, the locked state between the locking members 33, 33 and the pair of locked members 31, 31 is released. Then, since the upper rails 17a and 17b can move rearward with respect to the lower rails 16a and 16b, the upper rails 17a and 17b can be retracted together with the seat 13 by the penetration of the front surface of the vehicle 10 into the passenger compartment or the inflation of the airbag. .

The invention according to claim 3 is the invention according to claim 1 or 2, and further, as shown in FIG. 2, the seat fixing means 20 is opposed to the inner portions of the pair of lower rails 16a and 16b, and the moving member 19 is provided. And a grooved plate 21 formed with a plurality of concave grooves 21a along the longitudinal direction of the upper rails 17a and 17b. The grooved plate 21 is inserted between the grooved plate 21 and the upper rails 17a and 17b so that the center of the upper rails 17a and 17b is centered. A swinging member 24 that is pivotally supported and has a claw portion 24a that can be selectively inserted into a plurality of concave grooves 21a at the tip, an adjustment handle 22 attached to the proximal end of the swinging member 24, and a claw portion 24a. 3. The vehicle seat mounting structure according to claim 1 or 2, further comprising a swing member 24 or a spring member 26 that biases the adjustment handle 22 in a direction of insertion into the groove 21a.
In the vehicle seat mounting structure described in claim 3, the adjustment handle 22 is rotated together with the swinging member 24 to disengage the claw portion 24 a from the concave groove 21 a in the grooved plate 21, thereby moving the seat 13. By rotating the adjustment handle 22 in the reverse direction according to the urging force of the spring material 26 at the optimum position and inserting the claw portion 24a of the swing member 24 into the concave groove 21a, the seat 13 can be relatively easily moved by the driver. It can be fixed at any desired position. Then, by inserting the swing member 24 between the grooved plate 21 and the upper rails 17a and 17b, the seat fixing means 20 can be attached without changing the attachment position of the seat 13 with respect to the floor 11a.

The invention according to claim 4 is the invention according to claim 1 or 2, wherein, as shown in FIGS. 13 and 14, the seat fixing means 60 moves to face the inner portions of the pair of lower rails 16a and 16b. A plate 61 with a hole provided in the member 19 and having a plurality of square holes 61a formed along the longitudinal direction of the upper rails 17a and 17b, and the length of the upper rails 17a and 17b inserted between the plate 61 with the holes and the upper rails 17a and 17b. A rotary handle 62 attached to the upper rails 17a and 17b so as to be rotatable about the axis and the axis as a rotation center, and a base end fixed to the rotary handle 62, and a tip can be selectively inserted into the plurality of square holes 61a. The claw member 64 configured as described above and the rotation handle 62 are rotated in the direction in which the tip of the claw member 64 is inserted into the square hole 61a. A mounting structure of a vehicle seat that includes a torsion coil spring 66 biases.
In the vehicle seat mounting structure described in claim 4, the rotation handle 62 is rotated together with the claw member 64, the tip of the rotation handle 62 is disengaged from the square hole 61 a in the holed plate 61, and the seat 13 is moved. By rotating the rotary handle 62 in the reverse direction in accordance with the biasing force of the coil spring 66 at the position and inserting the tip of the claw member 64 into the square hole 61a, the seat 13 can be moved to an arbitrary position desired by the driver. Can be fixed. Then, by inserting the rotary handle 62 between the holed plate 61 and the upper rails 17a and 17b, the seat fixing means 60 can be attached without changing the attachment position of the seat 13 with respect to the floor 11a.

  In the vehicle seat mounting structure of the present invention, the pair of lower rails is provided with a pair of plate members that are superposed on both sides of the moving member, and a long slot is formed in the front-rear direction on both sides of the pair of plate members or the moving member. Then, the locking pin is fixed to both sides of the moving member or a pair of plate members, and the moving member is attached to the pair of lower rails so as to be movable in the front-rear direction by inserting and engaging the locking pin into the elongated hole. On the other hand, since the seat fixing means and the moving member fixing means are provided, it becomes possible to directly attach the upper rail to the lower rail. Compared to the conventional mounting structure in which the upper rail and the lower rail are attached via the first and second auxiliary rails. Thus, the mounting position of the seat with respect to the floor can be reduced.

  Further, the moving member fixing means includes a pair of locked members respectively provided on the inner side of the pair of lower rails, a housing provided on the moving member between the pair of locked members, and the housing from both sides. Each base end protrudes laterally so that it can be immersed, and a pair of locking tools each having a protruding tip that can be locked to a pair of locked members, and an impact greater than a predetermined value built in the housing When a force is applied to the seat from the front, the locking tool control means for allowing the base ends of the pair of locking tools to be inserted into the housing is provided. The control means allows the immersion of the pair of locking tools and releases the locking state between the locking tools and the pair of locked members. Then, since the upper rail can move rearward with respect to the lower rail, the upper rail moves backward together with the seat due to the intrusion of the front surface of the vehicle into the passenger compartment or the expansion of the airbag. As a result, the seat can be reliably retracted at the time of a frontal collision of the vehicle, and the escape property of the seated vehicle can be improved.

  Further, a sheet fixing means is provided on the moving member so as to face the inner portions of the pair of lower rails, and a plate in which a plurality of grooves or square holes are formed along the longitudinal direction of the upper rail, and between the plate and the upper rail. If a rocking member or claw member that is inserted and provided on the upper rail and can be selectively inserted into a plurality of grooves or square holes at the tip is provided with the tip of the rocking member or claw member from the groove or square hole in the plate The seat is moved, the seat is moved, and the tip of the rocking member or claw member is re-inserted into the groove or square hole at the optimum position, so that the seat can be fixed at any position desired by the driver relatively easily. can do. Then, by inserting the swing member or the claw member between the plate and the upper rail, the seat fixing means can be attached without changing the seat attachment position with respect to the floor.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 10, the cab 11 of the cab over type truck 10 is provided with a seat 13 facing the steering column 12 that rotatably holds the steering shaft. The seat 13 includes a seat cushion 13a that receives the driver's hip, and a seat back 13c that is attached to the rear end of the seat cushion 13a via a reclining adjuster 13b and receives the driver's back. A cushion frame 13d that supports the seat cushion 13a is provided below the seat cushion 13a (FIG. 2). A pair of lower rails 16a and 16b are disposed on the floor 11a of the cab 11 so as to extend in the traveling direction of the track 10. The pair of upper rails 17a and 16b are disposed on the seat cushion 13a so as to face the pair of lower rails 16a and 16b, respectively. 17b is fixed.

  As shown in FIGS. 1 and 2, the pair of upper rails 17a and 17b has substantially the same length as the pair of lower rails 16a and 16b, and the pair of upper rails 17a and 17b extends the pair of lower rails 16a and 16b from above. It is attached so as to be movable along its longitudinal direction. As shown in FIG. 2, a roller accommodating portion is formed between the upper rails 17a and 17b and the lower rails 16a and 16b, and this accommodating portion is provided to facilitate the movement of the upper rails 17a and 17b along the lower rails 16a and 16b. Each accommodates a roller 15a. Further, spherical bodies 15b are respectively inserted between both outer surfaces of the lower rails 16a and 16b and inner surfaces of the upper rails 17a and 17b covering the lower rails 16a and 16b from above. The spherical body 15b is provided so as to prevent the upper rails 17a and 17b from coming off the lower rails 16a and 16b, and to facilitate the movement of the upper rails 17a and 17b along the lower rails 16a and 16b by rolling them.

  As shown in detail in FIGS. 1 and 2, a pair of plate members 18a and 18b are attached between the floor 11a and the pair of lower rails 16a and 16b so as to extend in the front-rear direction along the pair of lower rails 16a and 16b. Between the pair of plate members 18a and 18b, there is provided a moving member 19 that is superposed on the pair of plate members 18a and 18b from below. The moving member 19 in this embodiment is a flat plate, and long holes 19a that are long in the front-rear direction are respectively formed on both sides of the moving member 19 that overlaps and faces the pair of plate members 18a and 18b. On the other hand, a locking pin 14 is fixed to the pair of plate members 18a and 18b so as to face the long hole 19a, and the locking pin 14 is inserted into and engaged with the long hole 19a. When the locking pin 14 moves inside the long hole 19a, the moving member 19 made of a flat plate is configured to be movable in the front-rear direction. The moving member 19 is connected to a pair of lower rails 16a, 18b via a pair of plate members 18a, 18b. It is attached to 16b so as to be movable in the front-rear direction. A pair of upper rails 17 a and 17 b is provided with a sheet fixing means 20 that selectively fixes the movable member 19 to an arbitrary position in the front-rear direction.

  The sheet fixing means 20 in this embodiment is inserted between the grooved plate 21 provided on the moving member 19 and the grooved plate 21 and the upper rails 17a and 17b, and the center is pivotally supported by the upper rails 17a and 17b. And an oscillating member 24. The grooved plate 21 is provided along the lower rails 16a and 16b on both sides of the moving member 19, and a number of concave grooves 21a (FIG. 1) are formed along the longitudinal direction of the rails 16a and 16b. The center of the swing member 24 is pivotally supported on the inner surfaces of the upper rails 17 a and 17 b facing the grooved plate 24 via a pivot pin 23. A distal end of a U-shaped adjustment handle 22 is fixed to the base end of the swing member 24, and the distal end of the swing member 24 is bent so as to face the numerous concave grooves 21a. A claw portion 24a that can be selectively inserted into the groove 21a is formed. The adjustment handle 22 is provided with a spring material 26 that urges the adjustment handle 22 to rotate the adjustment handle 22 in the direction in which the claw portion 24a at the tip of each swing member 24 is inserted into the groove 21a. Provided (FIG. 1).

  On the other hand, the moving member 19 is moved to the pair of lower rails so that the moving member 19 is moved backward with respect to the pair of lower rails 16a and 16b when an impact force of a predetermined value or more acts on the seat 13 from the front. Moving member fixing means 30 for fixing to 16a, 16b is provided. As shown in FIGS. 4 to 6, the moving member fixing means 30 in this embodiment includes a pair of locked members 31 respectively provided on the inner side of the pair of plate members 18 a and 18 b. The locked member 31 is provided along the longitudinal direction by raising the inside of a pair of plate members 18a, 18b provided between the pair of lower rails 16a, 16b and the floor 11a. A plurality of locked holes 31a are formed in the locked member 31 at predetermined intervals in the longitudinal direction of the pair of lower rails 16a and 16b (FIG. 5).

  Further, the moving member fixing means 30 in this embodiment includes a housing 32 provided on the moving member 19 between the pair of locked members 31 and a pair of locking provided protruding from both sides of the housing 32. The tool 33 is provided. The locking tool 33 includes a locking main body 33a configured to be locked in the locked hole 31a, and a rod-shaped member 33b provided with the locking main body 33a at the tip thereof. The base end of the rod-shaped member 33 b is provided so as to be immersible from both sides of the housing 32. The locking main body 33a at the protruding tip of the locking tool 33 provided so as to be immersible in the housing 32 is formed with a rear surface 33c inclined so that the locking tool 33 is engaged with the tip of the locking tool 33 being inserted into the locked hole 31a. It is formed so as to be in surface contact with the front surface of the stop hole 31a. The rod-shaped member 33b is provided with a coil spring 40 that urges the locking member 33 so that the tip of the locking member 33 protrudes (FIG. 2). The locking body 33a at the tip of the locking tool 33 is configured to be selectively locked in the locked hole 31a of the locked member 31 by the elastic force of the coil spring 40.

  Therefore, in this moving member fixing means 30, when a backward load is applied to the upper rail 17a, the load is transmitted to the moving member 19, and the pair of locking members 33 together with the moving member 19 tries to move backward together with the upper rail 17a. . Then, as shown in FIG. 8, the locking tool 33 is immersed in the housing 32 against the urging force of the coil spring 40 by the inclined rear surface of the locking body 33a that contacts the rear surface of the locked hole 31a. As shown in FIG. 9, when the tool 33 moves rearward and the tip faces the next locked hole 31a behind the locked hole 31a where the tip of the locking tool 33 has been locked until now. It protrudes by the biasing force of the coil spring 40. And the front-end | tip of the latching tool 33 latches in the to-be-latched hole 31a. That is, the locked member 31 and the locking tool 33 are configured to prevent the upper rails 17a and 17b from moving forward while allowing the upper rails 17a and 17b to move backward.

  As shown in FIGS. 2, 5, and 6, in the housing 32, the locking tool control means for immersing the base ends of the pair of locking tools 33, 33 in the housing 32, or disabling the immersion. 35 is provided. The locking tool control means in this embodiment is a sliding piece 35 housed inside the housing 32, and this sliding piece 35 is located between the base ends of the pair of locking tools 33, 33 in FIG. A first position 36 indicated by a solid line and a second position 37 indicated by a wavy line inside the housing 32 that is disengaged from the proximal end of the locking tool 33 in front of the first position 36 are movably accommodated in the housing 32. The housing 32 accommodates a piece receiving member 38 and is further provided with a maintenance spring 39 that biases the piece receiving member 38. The piece receiving member 38 is accommodated in the housing 32 between the first position 36 and the second position 37, and the piece receiving member 38 is affected by the inertial force of the sliding piece 35 applied when an impact force is applied to the seat 13. The sliding piece 35 is accommodated in the housing 32 so as to be immersed in a direction orthogonal to the moving direction of the sliding piece 35. The maintenance spring 39 extends in the insertion direction of the piece receiving member 38 and is provided in the housing 32. The maintenance spring 39 biases the piece receiving member 38 so as to protrude and maintains the sliding piece 35 at the first position 36 or the second position 37. Configured to let Here, reference numeral 41 denotes a cushion spring that alleviates the impact when the sliding piece 35 moves.

When the vehicle 10 collides with the front, an inertial force is generated in the sliding piece 35 located at the first position 36 to move to the second position 37. When another vehicle collides with the vehicle from behind, the sliding piece 35 moves to the second position 37. An inertial force that tends to move to the first position 36 is generated in the sliding piece 35 that is positioned. The inertia force is applied to the piece receiving member 38 and the piece receiving member 38 is immersed in a direction orthogonal to the moving direction of the sliding piece 35 in a state where the biasing force of the maintenance spring 39 is overcome, and the first piece in the sliding piece 35 is immersed. Adjustment is made such that movement from the position 36 to the second position 37 or movement from the second position 37 to the first position 36 is permitted.
Returning to FIG. 10, the steering column 12 is supported by a dash panel 46 in front of the seat 13 via a column support bracket 47, and a steering wheel 48 is fixed to a steering shaft protruding from the upper end of the steering column 12.

The operation of the vehicle seat mounting structure thus configured will be described.
The driver who drives the truck 10 for the first time needs to move the seat 13 in the front-rear direction and fix it at any optimum position according to his / her preference. This fixing is performed by the sheet fixing means 20, and the swinging member 24 is swung by lifting the adjustment handle 22 so that the tip of the swinging member 24 is detached from the recessed groove 21 a in the grooved plate 21. As a result, the upper rails 17a and 17b can move in the front-rear direction along the lower rails 16a and 16b independently of the moving member 19, and the adjustment handle 22 is lowered downward in accordance with the urging force of the spring material 26 at an optimal position. As a result, the claw portion 24a at the tip of the swing member 24 is inserted into the concave groove 21a, and the movement of the upper rails 17a, 17b relative to the moving member 19 in the front-rear direction is prohibited. On the other hand, since the locked member 31 and the locking tool 33 are in a state of being engaged with each other, the movement of the moving member 19 in the front-rear direction is prohibited. The seat 13 is fixed at an arbitrary position desired by the driver while being inserted into the concave groove 21a.

  Here, in this vehicle seat mounting structure, both ends of the moving member 19 are superposed on a pair of plate members 18a, 18b provided on the lower rails 16a, 16b, and the moving member 19 is connected to the pair of lower rails via the locking pins 14. Since the seat fixing means 20 and the moving member fixing means 30 are provided on the moving member 19 so as to be movable in the front-rear direction, the upper rails 17a and 17b can be directly attached to the lower rails 16a and 16b. Become. Then, by attaching the upper rails 17a and 17b directly to the lower rails 16a and 16b, the mounting position of the seat 13 with respect to the floor 11a as compared with the conventional mounting structure in which the upper rail and the lower rail are attached via the first and second auxiliary rails. Can be reduced. Since the swing member 24 is inserted between the grooved plate 21 and the upper rails 17a and 17b, the seat fixing means 20 can be attached without changing the attachment position of the seat 13 with respect to the floor 11a.

  After the seat 13 is fixed at a desired position, the driver sits on the seat 13 and drives the truck to run. When the truck 10 normally travels, an inertial force associated with traveling acts on the seat 13. Since this inertial force is not an impact load, the piece receiving member 38 comes into contact with the urging force of the maintenance spring 39 and the sliding piece 35 is positioned at the first position 36. On the other hand, when the truck 10 collides with the front, a shocking and large forward load acts on the seat 13 (range (a) in FIG. 11). Then, an inertial force that tends to move to the second position 37 is generated in the sliding piece 35 located at the first position 36. In a state where the inertial force overcomes the urging force of the maintenance spring 39, the piece receiving member 38 is immersed in a direction orthogonal to the moving direction of the sliding piece 35, and the sliding piece 35 is in the first position 36 as shown in FIG. To the second position 37. Thus, although the immersion of the locking tool 33 is allowed, the upper rails 17 a and 17 b are prevented from moving forward together with the moving member 19 by the locked member 31 and the locking tool 33. Thereafter, the forward load acting on the seat 13 decreases, changes to a backward load, and shifts to the range of FIG. However, since this backward load is not an impact load, the piece receiving member 38 comes into contact with the urging force of the maintenance spring 39 and the sliding piece 35 is maintained at the second position 37, and the urging force of the coil spring 40 The locking tool 33 is not immersed in the housing 32, and the seat 13 is prevented from moving backward due to the load in the range of FIG.

  When the truck 10 collides with the front, the steering column 12 moves backward to contact the seat cushion 13a or the airbag (not shown) is inflated, so that a backward load acts on the seat 13 (FIG. 11). (C) range). Then, the pair of locking members 33 and 33 try to move rearward together with the moving member 19 and the upper rail 17a, and as shown in FIG. 8, the inclined main surface of the locking main body 33a that contacts the rear surface of the locked hole 31a. The locking tool 33 is immersed in the housing 32 against the biasing force of the coil spring 40. Then, the pair of locking members 33 and 33 move rearward together with the moving member 19 and the upper rail 17a, and the upper rails 17a and 17b move backward along with the seat 13 along the lower rails 16a and 16b. As a result, the seat 13 can be reliably retracted at the time of a frontal collision of the truck 10, and the occupant's ability to escape the seat 13 can be improved. Further, as shown in FIG. 9, as the upper rails 17 a and 17 b retreat together with the seat 13, the pair of locking tools 33 and 33 are sequentially locked in the rear locked holes 31 a, so that the upper rails 17 a and 17 b Even if a forward load is applied to the seat 13 again, the seat 13 does not advance even if the seat 13 is held in the retracted position.

  In this embodiment, the sheet fixing means 20 provided with the grooved plate 21 and the swinging member 24 has been described. However, the sheet fixing means is not limited to this, and the sheet fixing means as shown in FIGS. 60 may be sufficient. The seat fixing means 60 includes a holed plate 61 provided in the moving member 19 and a pair of rotary handles 62a and 62b attached to the upper rails 17a and 17b along the longitudinal direction of the upper rails 17a and 17b. The perforated plate 61 is provided along the lower rails 16a and 16b on both sides of the moving member 19, and a plurality of square holes 61a are formed along the longitudinal direction of the rails 16a and 16b. Further, the base end of the handle holder 63 is fixed to the upper surfaces of the upper rails 17a and 17b, respectively, and the distal end of the handle holder 63 is located between the holed plate 61 and the upper rails 17a and 17b, and a round hole 63a is formed at the distal end. Is done. Rotating handles 62a and 62b are inserted between the perforated plate 61 and the upper rails 17a and 17b, respectively. The rotating handles 62a and 62b are rotatably inserted into the round holes 63a and can be rotated about the axis. Configured. A claw member 64 is inserted between the perforated plate 61 and the upper rails 17a and 17b, and the base ends of the claw member 64 are fixed to the pair of rotary handles 62a and 62b, respectively. The tips of the claw members 64 whose base ends are fixed to the pair of rotary handles 62a and 62b are bent so as to be selectively inserted into the plurality of square holes 61a. A pair of rotary handles 62a and 62b respectively provided on the upper rails 17a and 17b via the holder 63 are connected to each other via a connecting member 67 and a connecting wire 68 provided at their front ends, and one rotary handle 62a includes The torsion coil springs 66 that rotate the rotary handles 62a and 62b in the direction in which the rotary handles 62a are urged and the tips of the claw members 64 are inserted into the square holes 61a are wound (FIG. 12).

  The sheet 13 is fixed by the sheet fixing means 60 by rotating the pair of rotary handles 62a and 62b together with the claw member 24 as shown by the solid line arrow in FIG. 12, and the tip of the claw member 24 having a hole as shown in FIG. The plate 61 is separated from the square hole 61a. As a result, the upper rails 17a and 17b can move in the front-rear direction along the lower rails 16a and 16b independently of the moving member 19, and the pair of rotary handles 62a and 62b are moved according to the biasing force of the coil spring 66 at the optimum position. Rotate as shown by the dashed arrows in FIG. As a result, the tip of the claw member 64 is inserted into the square hole 61a as shown in FIG. On the other hand, since the locked member 31 and the locking tool 33 are engaged with each other, the movement of the moving member 19 in the front-rear direction is prohibited, and the tip of the claw member 64 is inserted into the square hole 61a. In this state, the seat 13 is fixed at an arbitrary position desired by the driver. Since the pair of rotary handles 62a and 62b are inserted between the perforated plate 61 and the upper rails 17a and 17b, the seat fixing means 60 can be attached without changing the attachment position of the seat 13 with respect to the floor 11a. .

  In the above-described embodiment, the case where the long holes 19a are formed on both sides of the moving member 19 and the locking pins 14 are fixed to the pair of plate members 18a and 18b has been described. However, the moving member 19 is a pair of lower rails. As long as it is movable in the front-rear direction with respect to 16a, 16b, a long hole is formed in the pair of plate members 18a, 18b in the front-rear direction, and the locking pin 14 is opposed to the long hole on both sides of the moving member 19. The locking pin 14 may be inserted and engaged with the long hole.

  Further, in this embodiment, a locking device control means including a sliding piece 35 housed in the housing 32 will be described, and the sliding piece 35 is moved to the first position by inertia force generated when the vehicle 10 collides with the front. Although it is moved from the first position 36 to the second position 37, the actuator 10 is actuated when a frontal collision of the vehicle 10 is detected, or a force other than an inertial force such as air pressure generated when the frontal collision of the vehicle 10 is detected. You may comprise so that the sliding piece 35 which is a locking tool control means may be moved from the 1st position 36 to a 2nd position.

In this embodiment, a cab-over type truck is used as the vehicle. However, a passenger car or other vehicle may be used.
Further, in this embodiment, the driver's seat is used as the seat, but a passenger seat or other seats may be used.

The perspective view which shows the attachment structure of the vehicle seat of this invention. AA line sectional view of FIG. The perspective view corresponding to FIG. 1 which shows the structure of the sheet | seat fixing means. The perspective view corresponding to FIG. 1 which shows the structure of the moving member fixing means. BB sectional view of FIG. CC sectional view of FIG. Sectional drawing corresponding to FIG. 5 which shows the state which the sliding piece moved to the 2nd position from the 1st position. Sectional drawing corresponding to FIG. 5 which shows the state which the latching tool began to immerse in a housing. Sectional drawing corresponding to FIG. 5 which shows the state which the latching tool latched in the following to-be-latched hole. The cross-sectional block diagram of the cab of the track | truck containing the sheet | seat which shows the state before front collision. The figure which shows the change of the load which acts on a sheet | seat when the track | truck collides with the front. The perspective view corresponding to FIG. 3 which shows the structure of another sheet | seat fixing means of this invention. Sectional drawing corresponding to FIG. 2 which shows the cross-sectional structure of the another sheet | seat fixing means. Sectional drawing corresponding to FIG. 13 which shows the state which the front-end | tip of the nail | claw member of the another sheet | seat fixing means removed from the plate with a hole. The block diagram which shows the attachment structure of the conventional vehicle seat.

Explanation of symbols

10 Truck (vehicle)
11a Floor 13 Seat 13a Seat cushion 14 Locking pin 16a, 16b Lower rail 17a, 17b Upper rail 19 Moving member 18a, 18b Plate material 19a Long hole 20, 60 Seat fixing means 21 Grooved plate 21a Groove 22 Adjusting handle 24 Oscillating member 24a Claw part 26 Spring material 30 Moving member fixing means 31 Locked member 32 Housing 33 Locking tool 35 Sliding piece (locking tool control means)
61 Plate with hole 61a Square hole 62 Rotating handle 64 Claw member 66 Torsion coil spring

Claims (4)

A pair of lower rails (16a, 16b) and a pair of lower rails (16a, 16b) disposed on the floor (11a) so as to extend in the traveling direction of the vehicle (10) at a predetermined interval in the vehicle width direction. A pair of upper rails (17a, 17b) fixed to the seat cushion (13a) of the seat (13) so as to face each other and attached to the pair of lower rails (16a, 16b) so as to be movable in the front-rear direction, and the pair A movable member (19) attached to the lower rail (16a, 16b) so as to be movable in the front-rear direction, and the pair of lower rails (16a, 16a, 16b) when an impact force of a predetermined value or more acts on the seat (13) from the front. 16b) moving member fixing means (30) for fixing the moving member (19) to the pair of lower rails (16a, 16b) so as to retract the moving member (19), and the pair of upper rails (17a) 17b) is configured to selectively fix the moving member (19) at an arbitrary position in the front-rear direction. In the mounting structure of the vehicle seat that includes a locking means (20, 60),
The pair of lower rails (16a, 16b) is provided with a pair of plate members (18a, 18b) that overlap on both sides of the moving member (19),
Long holes (19a) that are long in the front-rear direction are formed on both sides of the pair of plate members (18a, 18b) or the moving member (19) facing the pair of plate members (18a, 18b),
A locking pin (14) is fixed to both sides of the moving member (19) or the pair of plate members (18a, 18b) facing the long hole (19a),
The locking pin (14) is inserted and engaged with the elongated hole (19a), and the moving member (19) is attached to the pair of lower rails (16a, 16b) so as to be movable in the front-rear direction. A vehicle seat mounting structure.   The moving member fixing means (30) includes a pair of locked members (31, 31) provided on the inner side of the pair of plate members (18a, 18b), and the pair of locked members (31, 31). A housing (32) provided on the movable member (19) between the two, and a base end projecting from both sides of the housing (32) so as to be retractable laterally, and the projecting tips are the pair of covers. A pair of locking tools (33, 33) configured to be locked to the locking members (31, 31), respectively, and an impact force greater than a predetermined value built in the housing (32) from the front (13) ), The base ends of the pair of locking tools (33, 33) are made non-immersible in the housing (32), and an impact force of a predetermined value or more is applied to the seat (13) from the front. Locking means control means (35) for controlling the base end of the pair of locking tools (33, 33) so as to allow the immersion of the base end of the pair of locking tools (33, 33) into the housing (32), respectively. A mounting structure for a vehicle seat.   The seat fixing means (20) is provided on the moving member (19) so as to face the inner side of the pair of lower rails (16a, 16b), and has a plurality of concave grooves (21a) along the longitudinal direction of the upper rails (17a, 17b). A grooved plate (21) formed between the grooved plate (21) and the upper rail (17a, 17b) and pivotally supported at the center by the upper rail (17a, 17b). A swing member (24) formed with a claw portion (24a) that can be selectively inserted into the concave groove (21a), and an adjustment handle (22) attached to the base end of the swing member (24). The spring member (26) for urging the swinging member (24) or the adjustment handle (22) in a direction in which the claw portion (24a) is inserted into the concave groove (21a). The vehicle seat mounting structure according to 2. The seat fixing means (60) is provided on the moving member (19) so as to face the inner side of the pair of lower rails (16a, 16b), and has a plurality of square holes (61a) along the longitudinal direction of the upper rails (17a, 17b). A plate with a hole (61) having a hole formed therein, inserted between the plate with a hole (61) and the upper rail (17a, 17b) and rotated along the longitudinal axis of the upper rail (17a, 17b) A rotary handle (62) attached to the upper rail (17a, 17b) so as to be pivotable as a center, and a base end is fixed to the rotary handle (62), and a tip is selectively attached to the plurality of square holes (61a). A claw member (64) configured to be insertable, and the rotary handle (62) in a direction in which the tip of the claw member (64) is wound around the rotary handle (62) and inserted into the square hole (61a). The mounting structure for a vehicle seat according to claim 1 or 2, further comprising a torsion coil spring (66) biased to rotate.

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