JP2010234941A - Seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the rear end of a seat from sinking downward when the seat is raised up forward. <P>SOLUTION: A seat device includes: a seat 2; a guide 6 guiding the front part of the seat backward and forward from a rear part position to a front part position ahead of the rear part position, and the front part of the seat is attached so that the seat can swing up and down to be in a standing state in which the rear part is raised up forward and to be in a reclining state in which the rear part is reclined rearward; and downward movement regulation parts 21, 74 regulating the downward sinking of the rear part of the seat when the seat is in the reclining state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seat device, and more particularly, to a seat device in which a seat portion is raised up.

  In order to make effective use of the passenger compartment, there are some that can store the back row seats and middle row seats that are not used so that the space where the back row seats and the middle row seats were installed can be used for the cargo area. . Specifically, the seat can be stored by raising the seat part forward and then tilting the backrest forward (see, for example, Patent Document 1). On the other hand, when the seat is used, the seat can be assembled by raising the backrest, which has been lying down, and then tilting the seat back backward (see Patent Document 1).

  When the seat is assembled, the rear end of the seat sinks under the lower end of the backrest, and the lower end of the backrest and the upper rear end of the seat are in contact, so the lower end of the backrest and the seat The gap between the rear ends is filled. However, when raising the seat part forward, the rear end part of the seat part and the lower end part of the backrest interfere with each other. In order to solve this problem, the vehicle seat described in Patent Document 1 uses two torsion springs and arms.

  Specifically, as described in Patent Document 1, the fixing member (21a) is fixed to the floor (F), and one end of the arm (21c) is rotatable and fixed by the rotating shaft (21b). Connected to the member (21a), the other end of the arm (21c) is rotatable by a rotating shaft (21d) and connected to the seat (2). The first torsion spring (22) is provided at the connecting portion between the arm (21c) and the fixing member (21a). The load of the first torsion spring (22) is such that the arm (21c) is centered on the rotation shaft (21b). Thus, the arm (21c) is acted in a direction to rotate from the state of falling back to the state of falling forward. On the other hand, the second torsion spring (21i) is provided at the connecting portion between the arm (21c) and the seat (2), and when viewed from the left, the load of the second torsion spring (21i) is applied to the rotating shaft (21d). It acts on the seat (2) in the clockwise direction around the center.

  In the state in which the vehicle seat described in Patent Document 1 is assembled, the arm (21c) is tilted backward, the seat surface of the seat (2) faces upward, and the rear end of the seat (2) (2b) sinks under the lower end (3d) of the backrest. On the other hand, when the vehicle seat is to be stored from this state, the rear end (2b) of the seat (2) is rotated downward by the second torsion spring (21i), thereby causing the rear of the seat (2). The end (2b) shifts forward from below the lower end (3d) of the backrest (3). Then, when the arm (21c) is rotated from the state where the arm (21c) is tilted back to the state where the arm (21c) is tilted backward, the rear end (2b) of the seat (2) is lowered to the lower end of the backrest (3). The seat (2) is raised up without interfering with the part (3d).

JP 2007-216704 A

However, in the vehicle seat described in Patent Document 1, when the seat portion (2) is raised up, the rear end portion (2b) of the seat portion (2) sinks downward, so the seat portion (2) A space is required below the rear end (2b). Therefore, when installing the vehicle seat in the passenger compartment, the size and design of the passenger compartment are greatly limited.
Therefore, an object of the present invention is to prevent the rear end portion of the seat portion from sinking downward when the seat portion is lifted forward.

  In order to solve the above-described problems, according to the invention according to claim 1, the seat device is swung up into a seat portion, a standing state where the seat portion rises in front of the rear portion, and a lying state in which the seat portion lies down. The front part of the seat part is attached so that it can be swung down, and a guide for guiding the front part of the seat part back and forth from a rear position to a front position ahead of the rear part, and the seat part And a downward movement restricting portion for restricting the rear portion of the seat portion from sinking downward when in the lying state.

  According to the invention which concerns on Claim 2, when the said seat part of the said sheet | seat apparatus exists in the said lying state and the front part of the said seat part is located in a rear part position, the rear part of the said seat part swings up. An upper movement restricting portion for restricting is further provided.

  According to the third aspect of the present invention, the range in which sinking is restricted by the downward movement restricting portion of the seat device is larger than the range in which swinging is restricted by the upward movement restricting portion.

  According to the invention which concerns on Claim 4, when the said seat part of the said sheet | seat apparatus exists in the said lying state, and the front part of the said seat part is located in a rear part position, it further has the lock mechanism which locks the state. It was.

  According to the fifth aspect of the present invention, the seat device further includes a first urging portion that urges the seat portion forward.

  According to the invention which concerns on Claim 6, the said sheet | seat apparatus was further provided with the 2nd urging | biasing part which urges | biases the said seat part to the said standing-up state.

  According to the invention which concerns on Claim 1, it can prevent that the rear-end part of a seat part sinks down. Therefore, even if there is no space below the rear end portion of the seat portion, the rear end portion of the seat portion can be pulled out from under the lower end of the backrest. Therefore, a large space under the seat can be taken. Alternatively, it can be attached to a small vehicle.

  According to the invention which concerns on Claim 2, it can prevent that the rear-end part of a seat part swings up, and can make it come out from the lower end of a backrest to the front. Therefore, the rear end portion of the seat portion and the lower end of the backrest do not interfere, and the seat portion can be easily raised.

  According to the invention which concerns on Claim 3, when making a seat fall from a standing state to a lying state, the rear-end part of a seat can be reliably controlled by a downward movement control part.

  According to the fourth aspect of the present invention, when it is not necessary to advance or swing the seat, the seat is kept stationary with the seat being in the lying state and the front of the seat being in the rear position. Can do.

  According to the invention which concerns on Claim 5, since a seat part advances by the urging | biasing force of a 1st urging | biasing part, a seat part can be swung up more easily.

  According to the invention which concerns on Claim 6, since a seat part becomes a standing state by the urging | biasing force of a 2nd urging | biasing part, storing of a seat apparatus can be performed more easily.

It is the side view which showed the sheet | seat apparatus of 1st Embodiment of this invention. It is the perspective view which showed the sheet | seat apparatus of the same embodiment. It is the side view which showed a part of sheet apparatus of the same embodiment. It is the side view which showed the sheet | seat apparatus of the embodiment. It is the side view which showed the sheet | seat apparatus of the same embodiment. It is the side view which showed the sheet | seat apparatus of the embodiment. It is the side view which showed the sheet | seat apparatus of 2nd Embodiment of this invention. It is the side view which showed a part of sheet apparatus of the same embodiment. It is arrow sectional drawing of the surface along AA shown by FIG.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

(First embodiment)
First, the configuration of the vehicle seat device 1 will be described.
FIG. 1 is a side view of the vehicle seat device 1. FIG. 2 is a perspective view of the vehicle seat device 1. The vehicle seat device 1 is used for a rear row seat and a middle row seat of a passenger car. The vehicle seat device 1 includes a seat portion 2, a backrest 3 provided in a standing state on the back side of the seat portion 2, and a headrest 4 provided at an upper end portion of the backrest 3.

  The lower end of the backrest 3 is connected to the floor of the passenger compartment via a reclining mechanism. When the vehicle seat device 1 is used, the inclination of the backrest 3 can be adjusted by the reclining mechanism, and the backrest 3 is tilted backward, the backrest 3 is raised forward, and the inclination angle of the backrest 3 is maintained. be able to. In addition, when the vehicle seat device 1 is stored, the backrest 3 can be brought to the front by the reclining mechanism, and the backrest 3 can be put to sleep.

  The seat 2 is obtained by covering a frame with a foamed urethane pad and enclosing it with an outer skin. A rod-shaped guided portion 21 is fixed to the rear end portions of the left and right side surfaces of the seat portion 2. The guided portion 21 extends from the side surface of the seat portion 2 to the side, and is provided in a state where it is raised with respect to the side surface. Further, a rotating shaft 22 is provided at the lower front portion of the seat portion 2. The rotating shaft 22 is connected to the seat 2 in a state extending in the left-right direction from the left end to the right end of the seat 2. The rotating shaft 22 is provided so as to be rotatable with respect to the seat portion 2 around the axis.

  The upper ends of the sliders 5 are fixed to the left and right ends of the rotating shaft 22, respectively. These sliders 5 are provided perpendicular to the rotating shaft 22. In addition, the slider 5 and the rotating shaft 22 may not be fixed, but the rotating shaft 22 may be provided so as to be rotatable around the axis of the slider 5. Engagement portions 51 and 52 are provided on the lower side surfaces of the left and right sliders 5 so as to project.

  A torsion spring 23 as a second urging portion is inserted into the gap between the slider 5 and the seat portion 2, and the torsion spring 23 is wound around the rotary shaft 22. One end of the torsion spring 23 is hung on the slider 5, and the other end of the torsion spring 23 is hung on the side surface of the seat 2. The torsion spring 23 rotates counterclockwise around the rotating shaft 22 as a fulcrum when viewed from the direction in which the seat portion 2 stands backward from the state in which the seat portion 2 lies backward, that is, in the direction shown in FIG. It is energized in the direction to do.

  Front guides 6 are respectively provided on the floor and on the left and right sides of the seat 2. The front guide 6 includes a pair of front and rear plate-like fixing portions 62 fixed to the floor of the passenger compartment by bolts 61, a pair of front and rear legs 63 provided upright with respect to the fixing portion 62, and a front and rear From the linear lower receiving surface 64 provided between the upper ends of the leg portions 63, the arc-shaped stopper 65 provided standing from the front end of the lower receiving surface 64, and the rear end of the lower receiving surface 64 It has an arcuate stopper 66 provided in an upright state, and an upper receiving surface 67 provided between the upper end of the stopper 65 and the upper end of the stopper 66 and facing the lower receiving surface 64. The lower receiving surface 64 and the upper receiving surface 67 are provided horizontally and parallel to each other. The guide hole 6a surrounded by the lower receiving surface 64, the receiving portions 65 and 66, and the upper receiving surface 67 is provided long in the front-rear direction. The left and right front guides 6 are arranged in parallel to each other.

  The engaging portions 51 and 52 of the slider 5 are inserted into the guide hole 6 a and engaged with the front guide 6 so as to be sandwiched between the lower receiving surface 64 and the upper receiving surface 67. In this way, the seat 2 is supported by the front guide 6 via the slider 5. The slider 5 is guided by a front guide 6 and is slidable in the front-rear direction with respect to the front guide 6. Further, the slider 5 can move forward until the engaging portion 51 comes into contact with the stop portion 65, and can move backward until the engaging portion 52 comes into contact with the stop portion 66.

  A bracket 68 is fixed with bolts 61 on the floor and in front of the front guide 6. One end of a coil spring 69 that is a first urging portion is hung on the upper end of the bracket 68, and the other end of the coil spring 69 is hung on the slider 5. The coil spring 69 urges the slider 5 and the seat 2 to pull forward (leftward as viewed in the direction shown in FIG. 2).

  Rear guides 7 are respectively provided on the floor and behind the left and right front guides 6. The rear guide 7 includes a pair of front and rear plate-like fixing portions 72 fixed to the floor of the passenger compartment by bolts 71, a pair of front and rear legs 73 provided in a standing state with respect to the fixing portion 72, and a front and rear A linear lower receiving surface 74 provided between the upper ends of the leg portions 73, an arcuate stopper 75 provided in a standing state from the rear end of the lower receiving surface 74, and a front from the upper end of the stopper 75. And a linear upper receiving surface 76 facing the lower receiving surface 74. The lower receiving surface 74 and the upper receiving surface 76 are provided horizontally and parallel to each other. The front and rear length of the upper receiving surface 76 is shorter than the front and rear length of the lower receiving surface 74, and the front end of the upper receiving surface 76 is the lower receiving surface. It is located behind the front end of 74. The upper receiving surface 76 and the lower receiving surface 74 are positioned to the side of the lower end portion of the backrest 3 in the upright state, and the front ends of the upper receiving surface 76 and the lower receiving surface 74 are positioned forward of the lower end portion of the backrest 3. Further, the left and right rear guides 7 are arranged in parallel with each other and at an interval approximately equal to the lateral width of the seat portion 2. Further, since the left and right rear guides 7 are respectively positioned on the sides of the backrest 3, a reclining mechanism for connecting the backrest 3 can be provided in the rear guide 7.

  A lock mechanism 8 is provided on the side surface of the rear guide 7 on the left side (front side in FIG. 2). As shown in FIG. 3, the lock mechanism 8 includes an arm 82 that is rotatably supported by a rear portion of the stop portion 75 by a rotation shaft 81, a handle 83 that extends forward from the upper end of the arm 82, and a side of the arm 82. And an arm 84 extending forward from the portion. A claw 85 protrudes downward from the front end of the arm 84, and a slope 86 connecting the front end of the arm 84 and the lower end of the claw 85 is planar and extends rearward from the front end of the arm 84. Inclined so that it falls. A torsion spring 87 is inserted into the gap between the leg 73 and the arm 82, and the torsion spring 87 is wound around the rotation shaft 81. One end of the torsion spring 87 is hung on the leg portion 73, and the other end of the torsion spring 87 is hung on the side surface of the arm 82. The torsion spring 87 urges the arm 84 and the claw 85 to rotate counterclockwise with the rotating shaft 81 as a fulcrum when viewed in the direction shown in FIG. When the torsion spring 87 is in a natural state, the handle 83 and the arm 84 are in a horizontal state, the vertical position of the claw 85 is between the lower receiving surface 74 and the upper receiving surface 76, and the inclined surface 86 is It faces down diagonally forward. Note that the torsion spring 87 may be replaced by another type of elastic member (a tension spring, a compression spring, a leaf spring, or the like).

The front part of the seat part 2, the rotating shaft 22, and the slider 5 can take two positions, a front part position and a rear part position. When the front portion of the seat portion 2, the rotating shaft 22 and the slider 5 are in the rear position against the load of the coil spring 69, the engaging portion 52 of the slider 5 is in contact with the stop portion 66 of the front guide 6. . On the other hand, when the front part of the seat part 2, the rotary shaft 22 and the slider 5 are in the front part position, the engaging part 51 of the slider 5 comes into contact with the stop part 65 of the front guide 6 and the load of the coil spring 69 is stopped. Part 65 is received.
Moreover, the seat part 2 can take a standing state and a lying state. When the seat portion 2 is in a lying state against the load of the torsion spring 23, the seat portion 2 is disposed on the floor, and the seat surface 2a of the seat portion 2 faces upward. On the other hand, when the seat 2 is in an upright state, the seat 2 rises with its front end facing down and its rear end facing up, and the seating surface 2a of the seat 2 faces forward. Further, when the seat 2 is in a standing state, the torsion spring 23 is in a natural state.
When the front part of the seat part 2, the rotating shaft 22 and the slider 5 are in the rear position and the seat part 2 is in a lying state, the rear end of the seat part 2 as shown in FIGS. The part is under the lower end of the backrest 3. Further, as shown in FIG. 3, the guided portion 21 is inserted between the upper receiving surface 76 and the lower receiving surface 74 and is locked by the claw 85 of the lock mechanism 8. When the guided portion 21 comes into contact with the upper receiving surface 76, the load of the torsion spring 23 is received by the upper receiving surface 76, and the seat portion 2 is maintained in a lying state. When the guided portion 21 is locked to the claw 85 on the rear side of the claw 85, the load of the coil spring 69 is received by the claw 85, and the front portion of the seat portion 2, the rotary shaft 22 and the slider 5 are positioned at the rear position. The state to do is kept. The guided portion 21 is engaged with the claw 85 to prevent the seat portion 2 from moving forward, the guided portion 21 is in contact with the upper receiving surface 76 to prevent the seat portion 2 from rising, and the seat portion 2. It also serves to slide along the upper receiving surface 76 and the lower receiving surface 74 so as to guide the rear end portion of the rear end portion back and forth. Therefore, the number of parts can be reduced.
When the front part of the seat part 2, the rotating shaft 22 and the slider 5 are in the front part position and the seat part 2 is in a lying state, as shown by a two-dot chain line in FIG. Is positioned in front of the front end of the upper receiving surface 76 and is in contact with the lower receiving surface 74. Since the guided portion 21 is not in contact with the upper receiving surface 76, the seat portion 2 can be raised and lowered.

  In the state shown in FIG. 1 and FIG. 5, the guided portion 21 and the lower receiving surface 74 prevent the portion of the seat portion 2 behind the rotating shaft 22 from sinking downward. The guided portion 21 and the lower receiving surface 74 function as a downward movement restricting portion. On the other hand, the guided portion 21 and the upper receiving surface 76 prevent the rear portion of the seat portion 2 from being swung up from the rotating shaft 22 from being lifted, so that the guided portion 21 and the upper receiving surface 76 are restricted from moving upward. It functions as a part. In addition, since the longitudinal length of the lower receiving surface 74 is longer than the longitudinal length of the upper receiving surface 76, the range in which the lower movement restricting portion prevents the rear portion of the seat portion 2 from sinking is limited by the upper moving restricting portion. It is larger than the range in which the rear swing is prevented. Further, as shown in FIG. 2, since the guided portion 21, the upper receiving surface 76, and the lower receiving surface 74 are provided at a position higher than the floor, the lower movement restricting portion and the upper movement restricting portion are positioned higher than the floor. Is provided.

Next, the operation of the vehicle seat device 1 will be described.
As shown in FIGS. 1 and 4, the front portion of the seat portion 2, the rotating shaft 22 and the slider 5 are in the rear position, the seat portion 2 is in a lying state, and the backrest 3 stands upright. From this state, when the vehicle seat device 1 is stored, the lock mechanism 8 is first unlocked. Specifically, by pulling the handle 83 upward, the arm 84 and the claw 85 rotate clockwise around the rotation shaft 81 in the direction shown in FIG. The lock is released. Then, due to the load of the coil spring 69 acting on the slider 5, the front portion of the seat portion 2, the rotary shaft 22 and the slider 5 are moved horizontally from the rear position to the front. Then, the guided portion 21 also moves forward along the upper receiving surface 76 in a state of being in contact with the upper receiving surface 76 together with the seat portion 2. At this time, due to the load of the torsion spring 23, the seat 2 tends to rotate forward with the rotating shaft 22 as a fulcrum. However, since the guided portion 21 is in contact with the upper receiving surface 76, the rotation of the seat portion 2 is restricted, and the seat portion 2 moves forward while maintaining a lying state.

  As shown by a two-dot chain line in FIG. 5, when the front portion of the seat portion 2, the rotating shaft 22 and the slider 5 reach the front portion position, the engaging portion 51 comes into contact with the stop portion 65, and the slider 5 is moved forward. The movement is restricted, and the forward movement of the seat 2 is stopped. At almost the same time, the guided portion 21 comes out before the front end of the upper receiving surface 76. Since the front end of the upper receiving surface 76 is located in front of the lower end portion of the backrest 3, when the front portion of the seat portion 2, the rotary shaft 22 and the slider 5 reach the front portion position, the rear end portion of the seat portion 2. And a sufficient distance between the lower end of the backrest 3. Then, since the guided portion 21 is not received by the upper receiving surface 76, the seat portion 2 rotates about the rotation shaft 22 by the load of the torsion spring 23, and the rear portion swings up. In this way, the seat 2 is in an upright state. On the other hand, when the handle 83 is released, the claw 85 returns between the upper receiving surface 76 and the lower receiving surface 74 when viewed from the side.

Thereafter, as shown in FIG. 6, the backrest 3 is laid down with its lower end as a fulcrum.
Thus, the vehicle seat device 1 can be stored.

  When the vehicular seat device 1 is changed from a stored state to a state where it can be used as a seat, first, the backrest 3 is raised up with its lower end portion as a fulcrum. Subsequently, a backward load is applied to the seat 2. Then, the seat portion 2 rotates backward with the rotating shaft 22 as a fulcrum against the load of the torsion spring 23, and the rear portion of the seat portion 2 falls down. Eventually, the guided portion 21 comes into contact with the front portion of the lower receiving surface 74 and further rotation is restricted. Since the lower receiving surface 74 protrudes before the upper receiving surface 76, the guided portion 21 is not caught on the upper receiving surface 76. In this way, the seat 2 is in a lying state at the front position.

Thereafter, the seat 2 is pushed backward while keeping the seat 2 in the lying state, and the front portion of the seat 2, the rotary shaft 22 and the slider 5 are moved backward from the front position. Then, the guided portion 21 moves horizontally along the lower receiving surface 74 in a state where the guided portion 21 is in contact with the lower receiving surface 74. Eventually, the guided portion 21 also comes into contact with the upper receiving surface 76, and the rotation of the seat portion 2 is restricted. When the seat portion 2 is further pushed backward, the guided portion 21 comes into contact with the slope 86. Since the inclined surface 86 is inclined so as to be lowered rearward from the front end of the arm 84, when the seat portion 2 is continuously pushed backward, the guided portion 21 moves backward while pushing up the inclined surface 86, and the arm 84 and The claw 85 rotates clockwise against the load of the torsion spring 87. Then, the rear end portion of the seat portion 2 sinks under the lower end of the backrest 3. Eventually, when the guided portion 21 goes around the claw 85 and comes into contact with the stop portion 75, the arm 84 and the claw 85 rotate counterclockwise by the load of the torsion spring 87, and the claw 85 engages the guided portion 21. Stop. Thus, the front part of the seat part 2, the rotating shaft 22 and the slider 5 reach the rear part position, and the seat part 2 stops at that position.
By the above, the vehicle seat apparatus 1 can be assembled and the vehicle seat apparatus 1 can be used as a seat.

As described above, according to the present embodiment, when the vehicle seat device 1 is stored, the rear end of the seat 2 is moved to the front of the lower end of the backrest 3 as shown in FIG. Since the part 2 is swung up, the rear end part of the seat part 2 and the lower end part of the backrest 3 do not interfere with each other, and the seat part 2 can be easily raised.
In addition, since the rear end portion of the seat portion 2 does not sink downward during raising, a large space under the seat portion 2 can be taken. Alternatively, the vehicle seat device 1 capable of storing the seat portion 2 can be attached to a small vehicle that cannot take up a large space.

  Further, since the rear end portion of the seat portion 2 does not interfere with the lower end portion of the backrest 3, the seat portion 2 can be moved from the lying down state to the standing state only by the load of the torsion spring 23. That is, the seat portion 2 can be raised as shown in FIG. 5 simply by performing an operation of unlocking the lock mechanism 8.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
FIG. 7 is a side view of the vehicle seat device 101. FIG. 8 is a side view of the rear portion of the seat portion 2. FIG. 9 is a cross-sectional view of the surface along AA shown in FIG. In addition, the same code | symbol is attached | subjected to the part corresponding between the vehicle seat apparatus 1 of 1st Embodiment, and the vehicle seat apparatus 101 of 2nd Embodiment.

  In the vehicle seat device 1 of the first embodiment, the rear guide 7 is attached to the floor, and the guided portion 21 is attached to the rear end portion of the seat portion 2. On the other hand, in the vehicle seat device 101 of the second embodiment, the rear guide 7 and the guided portion 21 are not provided. Instead, the clamping part 107 is attached to the rear side surface of the seat part 2, and the support part 121 that is clamped in the vertical direction by the clamping part 107 is fixed to the floor. Other than that, portions corresponding to each other between the vehicle seat device 1 of the first embodiment and the vehicle seat device 101 of the second embodiment are similarly provided.

Hereinafter, the support part 121 and the clamping part 107 will be described in detail.
The support part 121 is an L-shaped rod. The support part 121 is provided below the backrest 3 so that the lower end of the support part 121 is joined to the fixing part 122 fixed to the floor by welding or the like, so that the support part 121 stands up against the fixing part 122. The upper end is bent toward the opposite side.

  The clamping unit 107 has a lower receiving surface 174, a stopper 175, and an upper receiving surface 176. The upper receiving surface 176 is a surface facing downward, and is provided on the rear side surface of the seat portion 2. The upper receiving surface 176 extends forward from the rear end of the seat portion 2. The lower receiving surface 174 is a surface facing upward, and is provided on the rear side surface of the seat portion 2. The lower receiving surface 174 faces the upper receiving surface 176 below the upper receiving surface 176, and the lower receiving surface 174 and the upper receiving surface 176 are provided in parallel to each other. The lateral sides of the lower receiving surface 174 and the upper receiving surface 176 are open, and the support portion 121 is inserted between the lower receiving surface 174 and the upper receiving surface 176 from the side. A stopper 175 is connected between the front end of the lower receiving surface 174 and the front end of the upper receiving surface 176. Further, the longitudinal length of the lower receiving surface 174 is shorter than the longitudinal length of the upper receiving surface 176, the upper receiving surface 176 extends rearward from the rear end of the lower receiving surface 174, and the rear end of the lower receiving surface 174 is the upper receiving surface. It is located in front of the front end of the surface 176. In addition, the support part 121 and the clamping part 107 are provided in the left-right pair.

  In the state shown in FIG. 7 and FIG. 8, the support portion 121 and the upper receiving surface 176 prevent the rear portion of the seat portion 2 from the rotating shaft 22 from sinking downward. The portion 121 and the upper receiving surface 176 function as a downward movement restricting portion. On the other hand, since the support portion 121 and the lower receiving surface 174 prevent the rear portion of the seat portion 2 from being swung up from the rotating shaft 22, the supporting portion 121 and the lower receiving surface 174 serve as the upward movement restricting portion. Function. Further, since the longitudinal length of the upper receiving surface 176 is longer than the longitudinal length of the lower receiving surface 174, the range in which the lower movement restricting portion prevents the rear portion of the seat 2 from sinking is limited by the upper moving restricting portion. It is larger than the range in which the rear swing is prevented. Further, as shown in FIG. 9, since the support portion 121, the upper receiving surface 176, and the lower receiving surface 174 are provided at a position higher than the floor, the lower movement restricting portion and the upper movement restricting portion are positioned higher than the floor. Is provided.

Next, the operation of the vehicle seat device 101 will be described.
As shown in FIG. 7, when the vehicle seat device 101 is in a state where it can be used as a seat, the front portion of the seat portion 2, the rotary shaft 22 and the slider 5 are in the rear position, and the seat portion 2 is lying down. The backrest 3 stands up. The rear end portion of the seat portion 2 is under the lower end of the backrest 3. In this state, the support portion 121 is inserted between the upper receiving surface 176 and the lower receiving surface 174 and is positioned at the front ends of the upper receiving surface 176 and the lower receiving surface 174.

  When the lock mechanism is unlocked from such a state, the front portion of the seat portion 2, the rotary shaft 22 and the slider 5 are moved horizontally from the rear position to the front due to the load of the coil spring 69. Then, the upper receiving surface 176 and the lower receiving surface 174 guide the support portion 121 and move forward together with the seat portion 2. At this time, since the upper receiving surface 176 is in contact with the support portion 121, the rear portion of the seat portion 2 does not sink downward. Further, since the support portion 121 is in contact with the lower receiving surface 174, the swinging up of the rear portion of the seat portion 2 due to the load of the torsion spring 23 is restricted, and the front portion moves forward while maintaining a lying state.

  When the front part of the seat part 2, the rotary shaft 22 and the slider 5 reach the front part position, the engaging part 51 comes into contact with the stop part 65 and the forward movement of the slider 5 is restricted, and the front part of the seat part 2 is restricted. Stop moving to. At substantially the same time, the rear end of the lower receiving surface 174 comes out in front of the support portion 121. Then, since the support part 121 is not received by the lower receiving surface 174, the seat part 2 rotates about the rotating shaft 22 by the load of the torsion spring 23, and the rear part swings up. In this way, the seat 2 is in an upright state.

Thereafter, the backrest 3 is laid down with its lower end as a fulcrum.
Thus, the vehicle seat device 1 can be stored.

  In order to change the vehicle seat device 101 from the stored state to a state where it can be used as a seat, first, the backrest 3 is raised up with its lower end as a fulcrum. Subsequently, a backward load is applied to the seat 2. Then, the seat portion 2 rotates backward with the rotating shaft 22 as a fulcrum against the load of the torsion spring 23, and the rear portion of the seat portion 2 falls down. Eventually, the support portion 121 comes into contact with the rear portion of the upper receiving surface 176, and further rotation is restricted. Since the rear end of the lower receiving surface 174 is located in front of the rear end of the upper receiving surface 176, the support portion 121 is not caught by the lower receiving surface 174. In this way, the seat 2 is in a lying state at the front position.

Thereafter, a backward load is applied to the seat portion 2 while the seat portion 2 is maintained in a lying state, and the front portion of the seat portion 2, the rotating shaft 22 and the slider 5 are moved backward from the front position. Then, the upper receiving surface 176 moves backward in a state where the upper receiving surface 176 is in contact with the support portion 121. Eventually, the lower receiving surface 176 also comes into contact with the support part 121, and swinging up of the rear part of the seat part 2 is restricted. If a backward load is continuously applied to the seat portion 2 as it is, the stop portion 175 contacts the support portion 121, and the front portion of the seat portion 2, the rotating shaft 22 and the slider 5 reach the rear position. Then, the seat portion 2 is locked by the lock mechanism, and the seat portion 2 stops at that position.
By the above, the vehicle seat apparatus 101 can be assembled and the vehicle seat apparatus 101 can be used as a seat.

As described above, according to the present embodiment, when the vehicle seat device 101 is stored, the seat portion 2 is swung up after the rear end portion of the seat portion 2 is moved to the front of the lower end portion of the backrest 3. The rear end portion of the seat portion 2 and the lower end portion of the backrest 3 do not interfere with each other, and the seat portion 2 can be easily raised.
In addition, since the rear end portion of the seat portion 2 does not sink downward during raising, a large space under the seat portion 2 can be taken. Alternatively, the vehicle seat device 101 capable of storing the seat portion 2 can be attached to a small vehicle that cannot take up a large space.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

For example, in each of the above-described embodiments, the case where the seat device according to the present invention is applied to a seat of an automobile has been described.
Further, the rotating shaft may be directly engaged with the guide without using the slider 5.
Moreover, you may perform the movement of the seat part 2 in the front-back direction and the movement between the standing state and the lying down state using a motor instead of the torsion spring 23 and the coil spring 69.
Further, the guided portion 21 does not need to be tightly sandwiched between the lower receiving surface 74 and the upper receiving surface 76, and the interval between the lower receiving surface 74 and the upper receiving surface 76 is set wider than the width of the guided portion 21. May be. The same applies to the support portion 121, the lower receiving surface 174, and the upper receiving surface 176 of the second embodiment.
In the second embodiment, a lock mechanism may be provided on the upper receiving surface 176 or the lower receiving surface 174 of the holding unit 107. If the lock mechanism is used, the seat portion 2 is in a lying state and in the rear position by engaging the holding portion 107 with the support portion 121 while the front end portion of the support portion 121 is in contact with the stop portion 175. It can be maintained in a state. Further, the vehicle seat device 101 can be easily stored by releasing the lock mechanism.

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus 2 Seat part 21 Guided part 22 Rotating shaft 23 Torsion spring (2nd biasing part)
5 Slider 51, 52 Engaging portion 6 Front guide 69 Coil spring (first urging portion)
7 Rear guide 74 Lower receiving surface 76 Upper receiving surface 8 Lock mechanism 85 Claw 86 Slope 107 Holding portion 174 Lower receiving surface 176 Upper receiving surface 121 Supporting portion

Claims (6)

A seat,
The front part of the seat part is attached so that the seat part can be swung up and down in a standing state where the seat part stands up before the rear part and a lying down state where the seat part falls down, and the front part of the seat part is located at the rear position. And a guide that guides back and forth from the front position to the front,
And a downward movement restricting portion for restricting a rear portion of the seat portion from sinking downward when the seat portion is in the lying state.   The apparatus further comprises an upward movement restricting part for restricting the rear part of the seat part from swinging up when the seat part is in the lying state and the front part of the seat part is located at the rear position. Item 2. The sheet apparatus according to Item 1.   The sheet apparatus according to claim 2, wherein a range in which sinking is restricted by the downward movement restriction unit is larger than a range in which swinging is restricted by the upward movement restriction unit.   4. The device according to claim 1, further comprising a lock mechanism that locks the state when the seat portion is in the lying state and the front portion of the seat portion is located at the rear position. The sheet apparatus according to 1.   The seat device according to any one of claims 1 to 4, further comprising a first urging portion that urges the seat portion forward.   The seat device according to any one of claims 1 to 5, further comprising a second urging portion that urges the seat portion in a direction in which the seat portion is swung up to the upright state.

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