JP2005153540A - Storage type seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase support strength in the using state and improve reliability when an excessive load is applied on the seat even though it is a storage type seat. <P>SOLUTION: In the storage type seat, the seat cushion 10 is supported on a floor F1 side of a vehicle with a link mechanism composed of a pair of right and left front side legs 40 and rear side legs 60 respectively. Either one of the pair of the legs 40, 60 is constituted so as to be inclined to the floor F1 side with a driving means 50. The seat can be switched to the using state of the seat or storage state by the action of the link mechanism with the driving means 50. In the using state of the seat, the seat is set so that the approximately middle part in the lengthwise direction of either one of the pair of legs 40, 60 and the floor F2 in the inside the vehicle abut each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a retractable seat for a vehicle, and more particularly, to a retractable seat of a type in which a seat is retracted by lowering a seat cushion to a floor side by an operation of a link mechanism.

For this type of sheet, for example, a technique disclosed in Patent Document 1 is already known. In this technique, the seat is supported so as to be moved up and down by front and rear links with respect to the floor side. The hinge means provided at the seat side fulcrum of the rear link is provided with a link rotation restricting function. With this rotation restricting function, it is possible to hold the seat in the storage recess on the floor side and the use state in which the seat is positioned above the storage recess.
Japanese Utility Model Publication No. 6-22062

However, in the retractable seat supported by the link, there is anxiety in the support strength in the use state only by the function of restricting the rotation of the link in the hinge means. For example, there remains a problem with reliability when an excessive load is applied to the seat, such as when a vehicle collides.
The present invention is intended to solve such problems. The purpose of the present invention is to improve the support strength in the use state of a retractable seat, and to improve the reliability when an excessive load is applied to the seat. It is to improve.

The present invention is for achieving the above object, and is configured as follows.
In the first aspect of the present invention, the seat cushion is supported on the floor side of the vehicle by a link mechanism including a pair of left and right front legs and rear legs, and either one of the pair of legs is driven by driving means. The retractable seat is configured to be inclined with respect to the floor side, and the seat can be switched to a use state or a storage state by an operation of a link mechanism by the driving unit. The configuration is such that the substantially central portion in the length direction of either one of the pair of legs is in contact with the vehicle interior floor. With this configuration, when the seat is in use, the front leg of the seat comes into contact with the vehicle interior floor at the approximate center of the upper and lower fulcrum. Since it can be halved, the support strength of the sheet can be increased.

  Invention of Claim 2 is a retractable sheet | seat described in Claim 1, Comprising: The joining which joins between one said leg in the approximate center part in the length direction of one said leg of said pair A member is provided in the horizontal direction, and the joining member and the vehicle interior floor are set to contact each other when the seat is in use. Therefore, the joining member comes into contact with the interior floor in the length direction. Therefore, compared with a case where the front legs abut on the vehicle floor substantially vertically, the abutting range is widened, so that the support strength of the seat can be increased.

  Invention of Claim 3 is a retractable sheet | seat described in Claim 1 or 2, Comprising: The substantially center part or the said joining member in the length direction of either one of said pair of leg | legs is set by the said drive device. The configuration is set so as to urge the floor in contact with the vehicle interior. For this reason, the front leg or the joining member is in contact with the floor in the vehicle while being urged. Therefore, the support strength of the sheet can be increased without causing a gap or play at the contact position.

  A fourth aspect of the present invention is the retractable seat according to the second or third aspect, and includes a lock mechanism capable of coupling the joining member and the interior floor. For this reason, when the interior floor and the joint member of one leg are joined, the interior floor is joined to the joint member not only when the load acts on the seat in the forward direction of the vehicle but also when the load acts on the rear direction of the vehicle. Therefore, the support strength of the sheet can be increased.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
(Example 1)
First, Example 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a side view showing a retractable seat for a vehicle according to the present invention in use. FIG. 2 is a perspective view showing the skeleton (frame) of the retractable seat. The retractable seats shown in these drawings can adjust the tilt angle of the seat back 20 in the front-rear direction with respect to the seat cushion 10 by the reclining device 26. The reclining device 26 can be superposed on the seat cushion 10 by tilting the seat back 20 forward and can be held in that state. The seat cushion 10 is supported by a pair of front legs 40 and a pair of rear legs 60 on the first floor F1 side of the vehicle. In addition, the second floor that is one step higher than the first vehicle floor F1 on which the foot is placed when seated on the retractable seat is defined as F2. The “first floor” and the “second floor” described in each example correspond to the “vehicle floor” and the “in-vehicle floor” of the present invention, respectively.

  The seat back 20 includes a headrest 21 (FIG. 1). The headrest 21 is supported so that it can be raised and lowered with respect to the back frame 22. The headrest 21 when the seat is stored is lowered to a state where a part of the headrest 21 overlaps the front surface of the seat back 20.

  As shown in FIGS. 1 and 2, the reclining device 26 connects the cushion frame 12 of the seat cushion 10 and the back frame 22 of the seat back 20. The front legs 40 and the rear legs 60 support the cushion frame 12 with respect to the first floor F1 side. The front leg 40 and the rear leg 60 constitute a four-link parallel link mechanism together with the cushion frame 12 and the first floor F1. By operating the link mechanism, the cushion frame 12 (seat cushion 10) can be brought down to the first floor F1 side.

  FIG. 3 is a perspective view showing related members of the cushion frame 12 and the back frame 22 in an exploded state. As is apparent from this drawing, the cushion frame 12 and the back frame 22 are mainly made of U-shaped pipe materials. The lower arm 16 fixed to both ends of the cushion frame 12 and the upper arm 24 fixed to both ends of the back frame 22 are connected via a reclining device 26. Further, the left and right lower arms 16 are coupled to each other by a reinforcing rod 14 bridged between them.

  A driving means 30 of a reclining device 26 is attached to the lower arm 16 on one side of the cushion frame 12. The drive means 30 includes a motor 32 and a differential device 34, and the motor 32 can be controlled to rotate in both forward and reverse directions. The rotation of the motor 32 is transmitted to the operating shaft 36 of one reclining device 26 through the differential device 34. The rotation of the operating shaft 36 is transmitted to the reclining shaft 38 of the other reclining device 26 through the connecting rod 37. As a result, the reclining devices 26 are operated in synchronism with each other by the driving means 30.

  FIG. 4 is a perspective view showing related members of the cushion frame 12 and the front leg 40 in an exploded state. As is clear from this drawing, the front leg 40 is composed of a pair of left and right pipe members, and the lower end portions thereof are fixed to a single lower shaft support portion 42, respectively. Further, the upper end portion of the front leg 40 is provided with an upper shaft support portion 46, respectively. Both ends of the lower shaft support portion 42 are rotatably supported by a pair of bearing brackets 44 fixed on the first floor F1. Both upper shaft support portions 46 are connected to the left and right hinge brackets 12 a provided on the front lower surface of the cushion frame 12 by hinge pins 47, respectively. Accordingly, the front leg 40 forms a part of a parallel link with respect to the front portion of the cushion frame 12 and the first floor F1.

  On the first floor F1 in front of the front leg 40 and below the second floor F2, the cushion frame 12 is brought down to the first floor F1 side or returned to the original state. Driving means 50 is provided. The driving means 50 includes a motor 52 and a differential device 54, and these are supported by a pin 57 so as to be vertically rotatable with respect to a mounting bracket 56 fixed on the first floor F1. The motor 52 can be controlled to rotate in both forward and reverse directions, and the rotation is converted into a reciprocating movement of the operating member 58 (screw rod) in the differential device 54.

  The connecting member 58a connected to the distal end portion of the operating member 58 is rotatably connected to the connecting arm 42a fixed to the lower shaft support portion 42 of the front leg 40 by a connecting pin 58b. Further, the hook 58a-1 at the tip of the connecting member 58a is positioned so as to be able to engage with or release from the engaging member 48 fixed near the lower portion of the front leg 40. Further, a joining member (for example, a striker) 43 that joins the front legs 40 is provided in a horizontal direction at a substantially central portion in the length direction of the front legs 40, and the second floor F2 (see FIG. 4) (not shown in FIG. 4).

  5 and 6 are perspective views showing the related members of the reinforcing rod 14 of the cushion frame 12 and the left and right rear legs 60 in an exploded state. FIG. 7 is an enlarged side view showing a related portion of the rear leg 60. As is clear from these drawings, the two rear legs 60 having the same structure are arranged symmetrically. Each rear leg 60 has a structure in which two plate members 61 and 62 are combined in one set. The lower ends of the plate members 61 and 62 constituting the rear leg 60 are positioned so as to sandwich the bearing bracket 64 fixed on the first floor F1 from both sides, and the hinge pin is inserted into the long hole 64a of the bearing bracket 64. 66. And the stopper 68 is arrange | positioned in the front position of the bearing bracket 64 on the 1st floor F1. The functions of the long hole 64a supporting the lower end portion of the rear leg 60 and the stopper 68 will be described later.

  The upper end portions of both plate members 61 and 62 constituting the rear leg 60 are hinge pins 70 with respect to the hinge bracket 14a fixed to the reinforcing rod 14 of the cushion frame 12 with the spacer 72 sandwiched therebetween. It is connected by. Accordingly, the left and right rear legs 60 constitute a part of a parallel link with respect to the rear portion of the cushion frame 12 and the first floor F1. Note that the left and right rear legs 60 are coupled to each other by a reinforcing rod 73 spanned between them.

  Next, the movement when the sheet is switched from the use state to the storage state will be described mainly with reference to FIGS. 8 to 9, (A) is an overall view of the sheet, and (B) is an enlarged view in a virtual circle in (A). The movement of the seat cushion 10 and the seat back 20 will be described as the movement of the cushion frame 12 and the back frame 22.

  When the switch (not shown) for storing operation is operated in the sheet use state shown in FIG. 8, the motor 32 of the driving means 30 is first started. By the operation of the reclining device 26 accompanying this, the seat back 20 starts to tilt forward as shown in FIG. Subsequently, the motor 52 of the driving means 50 starts driving. In conjunction with this, the actuating member 58 is pushed out from the differential device 54 side, and the lower shaft support portion 42 of the front leg 40 rotates about its axis through the connecting member 58a and the connecting arm 42a.

  Thereby, the front leg 40 starts to tilt backward as shown in FIG. After the operation member 58 starts to be pushed out, as is clear from FIG. 9B, the hook 58a-1 of the connecting member 58a is disengaged from the engaging member 48 of the front leg 40, and the front leg 40 is tilted. Is possible. Further, the contact between the joining member 43 and the second floor F2 is also released.

  As the front leg 40 tilts backward, the operation of the link mechanism including the front leg 40 lowers the cushion frame 12 toward the first floor F1 and the rear leg 60 also tilts backward. Further, the tilting operation of the back frame 22 is continued.

  As shown in FIG. 10, when the front leg 40 is completely tilted, the motor 52 of the driving means 50 stops. In this state, the cushion frame 12 falls to a state substantially parallel to the first floor F1 surface, and the seat is in a retracted state. Note that the storage state of the sheet is maintained because the driving units 30 and 50 are in the stopped state.

    In order to switch the seat from the storage state shown in FIG. 10 to the use state shown in FIG. 8, the motors 32 and 52 of the driving means 30 and 50 are rotated in the opposite direction to that during the storage operation by operating a switch (not shown). Drive. Thereafter, when the back frame 22 is rotated to the state shown in FIG. 8 and the front leg 40 is substantially vertical and rotated until the joining member 43 comes into contact with the second floor F2, the seat returns to the use state, and the driving means. The motors 32 and 52 of 30 and 50 respectively stop.

  Further, when the seat is returned to the use state, the hook 58a-1 of the connecting member 58a in the driving means 50 engages with the engaging member 48 of the front leg 40 again as is apparent from FIG. As the engaging member 48 is pulled toward the driving device 50 by the engagement of the hook 58a-1, the front leg 40 is also pulled toward the driving device 50, so that the joining member 43 is forced to generate the second force with a strong force. It will be in the state pressed against floor F2, and will be in the state where the degree of contact increases.

  When the seat is returned to the use state, the lower end portion of the rear leg 60 comes into contact with the stopper 68 and is pushed backward. As a result, the hinge pin 66 is positioned at the rearmost position in the elongated hole 64a in the bearing bracket 64 (FIG. 7), and this state is maintained until the rear leg 60 starts to tilt backward again.

  Subsequently, with reference to FIG. 11, the joint member 43 of the front leg 40 has a second moment regarding the moment acting on the front leg 40 when the force “N” acts on the seat in the front direction of the vehicle in the usage state of the seat. Each state when not in contact with the floor F2 (FIG. 11A) and when in contact with the floor F2 (FIG. 11B) will be described. As shown in the figure, when the seat is in use, the seat cushion 10 is supported by the front legs 40 and the rear legs 60 with respect to the first floor F1, and the upper and lower fulcrums (hinge pins 47, 42) of the front legs 40 are supported. ) The distance is “H”.

First, a case where the joining member 43 of the front leg 40 is not in contact with the second floor F2 (FIG. 11A) will be described. In this case, the moment “M ₁ ” acting on the front leg 40 acts in the forward direction of the vehicle (counterclockwise in the figure) around the lower shaft support portion 42 that is the lower fulcrum of the front leg 40. The magnitude of this moment “M ₁ ” is “NH”.

Next, the case where the joining member 43 of the front leg 40 is in contact with the second floor F2 (FIG. 11B) will be described. In this case, the moment “M ₂ ” acting on the front leg 40 acts toward the front of the vehicle (counterclockwise in the drawing) around the contact position between the front leg 40 and the second floor F2. Since the abutting position is located at a substantially central portion in the length direction of the front leg 40, the magnitude of the moment “M ₂ ” is “(NH) / 2”.

  In this way, if a contact position that contacts the second floor F2 is provided at a substantially central portion in the length direction of the front leg 40, a force “N” acts on the seat in the front direction of the vehicle in the use state of the seat. In this case, the moment acting on the front leg 40 is halved compared to the case where no contact position is provided. Therefore, even when the retractable seat is used, even when an excessive load is applied to the seat in the forward direction of the vehicle in the state of use, the support strength is increased and the reliability is enhanced.

(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIGS. 12 to 13, (A) is an overall view of the sheet, and (B) is an enlarged view in a virtual circle in (A). In this embodiment, the movement of the seat cushion 10 and the seat back 20 will be described as the movement of the cushion frame 12 and the back frame 22. FIG. 12 is a side view showing the usage state of the retractable seat. As apparent from the drawing, the second embodiment is different from the first embodiment described above in that the second floor F2 and the joining member 43 of the front leg 40 are connected by the lock mechanism L1 provided on the second floor F2. Are combined, and the contact between the second floor F2 and the joining member 43 described in the first embodiment is made stronger. In the following description, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals in the drawings, and the redundant description is omitted.

  As shown in FIG. 12, the end of the second floor F2 on the seat side is provided with a lock mechanism L1 that can couple the second floor F2 and the joining member 43 of the front leg 40 in the seat usage state. Yes. First, the lock mechanism L1 will be described in detail. The main components of the lock mechanism L1 are assembled with a pair of base plates 80, 82 and a latch 84 and a pole 86 sandwiched between the base plates 80, 82. The latch 84 and the pole 86 are disposed in substantially the same plane. In FIGS. 12B and 13B, the front side base plate 82 is removed so that the movement of the latch 84, the pole 86, etc. can be easily understood.

  The base plate 80 includes a concave portion 80a that opens to the right at its right end. The recess 80a can receive the joining member 43 from the open side, and the opening width is gradually increased toward the right in order to facilitate the reception.

  The latch 84 is supported by the support shaft 88 with respect to the base plate 80 so as to be rotatable around its axis. The latch 84 includes a hook portion 84a that opens downward. By the rotation of the latch 84, the hook portion 84a can be engaged with or released from the joining member 43 received in the recess 80a. In a state where the hook portion 84a is engaged with the joining member 43, the joining member 43 is sandwiched between the hook portion 84a and the recess 80a to be locked (FIG. 12B). The latch 84 includes an engaging recess 84d on the lower left side of the hook portion 84a, and a protrusion 84b between the engaging recess 84d and the hook portion 84a-1. A spring hooking hole 84 c is provided at the upper left portion of the latch 84.

  The pole 86 is supported at a position adjacent to the latch 84 in the base plate 80 so as to be rotatable around the axis of the support shaft 90. The support shaft 90 can rotate integrally with the pole 86 and is supported rotatably with respect to the base plate 80. The pole 86 includes an engaging protrusion 86a on the side facing the latch 84 (upward in FIG. 12B). The engaging convex portion 86 a is positioned so as to be engageable with the engaging concave portion 84 d of the latch 84 in the locked state engaged with the joining member 43. A spring hooking hole 86 c is provided in the lower left part of the pole 86. A tension spring 92 is hung on the spring hooking holes 84 c and 86 c of the latch 84 and the pole 86. The tension spring 92 urges the latch 84 and the pole 86 in a direction to narrow their distance (in FIG. 12B, the latch 84 is counterclockwise and the pole 86 is clockwise).

  One end of a release lever 94 is coupled to the end of the support shaft 90 positioned outside the base plate 80, and an operation cable 96 is coupled to the other end of the release lever 94. When the operation cable 96 is pulled by the unlocking operation, the pole 86 is rotated counterclockwise in FIG. 12B through the release lever 94 and the support shaft 90.

  The lock mechanism L1 is in a locked state in which the joining member 43 is received in the recess 80a of the base plate 80 in the use state of the sheet shown in FIG. In this locked state, the hook portion 84 a of the latch 84 is engaged with the joining member 43 as already described. Then, due to the urging force of the tension spring 92, the engaging concave portion 84d and the engaging convex portion 86a between the latch 84 and the pawl 86 are brought into an engaged state, so that the latch 84 and the pawl 86 are held. In this holding state, the joining member 43 is received in the hook portion 84a-1 of the latch 84. Therefore, since the joining member 43 is sandwiched between the hook portion 84a-1 and the recess 80a, the second floor F2 and the front leg 40 are joined.

  Next, the movement when the sheet is switched from the use state to the storage state will be described. In this embodiment, only the switch operation is necessary in the switching of the sheet in the first embodiment. In the second embodiment, the unlocking operation is also necessary in addition to the switch operation. Since the switch operation has already been described in the first embodiment, it will be omitted, and the lock release operation will be described with reference to FIG. In the unlocking operation, when the operation cable 96 already described is pulled in the right direction in the figure, the pole 86 is rotated counterclockwise against the elastic force of the tension spring 92. By this rotation, the engagement state between the engagement concave portion 84d of the latch 84 and the engagement convex portion 86a of the pole 86 is released, and the projection 84b of the latch 84 pushes the joining member 43 toward the opening side of the concave portion 80a. And it hold | maintains again in the state from which engagement with the engagement recessed part 84d and the engagement convex part 86a removed. In this way, the lock mechanism L1 enters the unlocked state in which the joining member 43 is pushed out of the latch hook portion 84a-1 and the concave portion 80a of the base plate 80 and is released.

  Then, the lock mechanism L1 is unlocked by each of the switch operation and the lock release operation, the drive motors 32 and 52 of the drive means 30 and 50 are driven, the back frame 22 is moved forward, and the front leg 40 is moved. Tilt backwards each. Then, as shown in FIG. 14, when the tilting is completed, the drive motors 32 and 52 are stopped and the sheet storage state is maintained.

  Subsequently, in order to switch the seat from the stored state shown in FIG. 14 to the used state shown in FIG. 12, the drive motors 32 and 52 of the drive means 30 and 50 are operated by operating switches (not shown) as in the first embodiment. Each is driven in the opposite direction to the retracting operation to cause the back frame 22 to move backward and the front leg 40 to move forward. When the joining member 43 of the front leg 40 that has been raised eventually hits the protrusion 84b of the latch 84, the latch 84 starts to be pushed and rotated (clockwise in FIG. 13B), and the engaging recess 84d of the latch 84 and When the engaging projection 86a of the pole 86 is held in an engaged state, the hook portion 84a-1 of the latch 84 is pulled in with respect to the joining member 43 from above and holds the joining member 43 together with the recess 80a of the base plate 80. .

  In this way, when the second floor F2 and the joining member 43 of the front leg 40 are coupled to each other by the lock mechanism L1 attached to the second floor F2, not only when a load acts on the seat in the front direction of the vehicle. Even when a load is applied in the rearward direction of the vehicle, the second floor F2 is coupled to the joining member 43, so that the support strength of the seat can be increased.

The contents described above are only related to one embodiment of the present invention, and do not mean that the present invention is limited to the above contents.
In the first embodiment, the configuration in which the joining member 43 of the front leg 40 is in contact with the second floor F2 has been described as an example. However, the configuration is not limited thereto, and the front leg 40 is directly connected to the second floor F2. It may be configured to abut. In that case, the joining member 43 may not be provided. Further, when the joining member 43 is not provided in this way, a supporting member (for example, an angle) joined to the first floor F1 is pulled out vertically from the side of the vehicle, and the supporting member and the front leg 40 are It is also possible to use a configuration in which

  In the second embodiment, the configuration in which the lock mechanism L1 is provided on the second floor F2 side has been described as an example. However, the configuration is not limited to this, and the configuration may be provided on the front leg 40 side. In that case, it is necessary to provide the joining member 43 on the second floor F2 side.

  In addition to the above, it can also be applied to a type in which the front leg and the rear leg are tilted forward and the seat is folded and stored. In this case, the rear leg and the driving means are rotatably connected, and the seat is used. Alternatively, the rear end surface of the rear leg may be brought into contact with the second floor of the vehicle directly or via a joining member.

Side view showing a retractable seat for a vehicle in use (Example 1) A perspective view showing a skeleton (frame) of a retractable seat (Example 1) The perspective view which represented the related member of a cushion frame and a back frame in the decomposition | disassembly state (Example 1) A perspective view showing a member related to a cushion frame and a front leg in an exploded state (Example 1) An exploded perspective view showing members related to the cushion frame side member and the right rear leg (Example 1) An exploded perspective view showing a member related to the cushion frame side member and the left rear leg (Example 1) Side view showing the rear leg enlarged (Example 1) Side view showing a seat frame in a seat use state (Example 1) A side view showing a seat frame in which the front and rear legs are tilted (Example 1) Side view showing the seat frame in a state where the tilting operation of the front leg and the rear leg is completed (Example 1) Explanatory drawing about the moment acting on the front leg (Example 1) Side view showing a seat frame in a seat use state (Example 2) Side view showing a seat frame in which the front and rear legs are tilted (Example 2) Side view showing the seat frame in a state where the tilting operation of the front leg and the rear leg is completed (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seat cushion 20 Seat back 40 Front leg 43 Joining member 30,50 Drive means 60 Rear leg F1 1st floor F2 2nd floor L1 Locking mechanism

Claims (4)

  The seat cushion is supported on the floor side of the vehicle by a link mechanism composed of a pair of left and right front legs and rear legs, and either one of the pair of legs is tilted with respect to the floor by the driving means. And a retractable seat that can be switched to a use state or a storage state by operation of a link mechanism by the driving means, and in the use state of the seat, either one of the pair of legs A retractable seat that is set so that the substantially central portion in the length direction of the vehicle and the vehicle interior floor come into contact with each other.   The retractable seat according to claim 1, wherein a joining member for joining the one leg is provided in a horizontal direction at a substantially central portion in the length direction of either one of the pair of legs, A retractable seat set so that the joining member and the vehicle interior floor come into contact with each other in use.   3. The retractable seat according to claim 1, wherein a substantially central portion or the joining member in a length direction of either one of the pair of legs is attached to the abutting floor in the vehicle by the driving device. A retractable sheet that is set to force. 4. The retractable seat according to claim 2, wherein the retractable seat includes a lock mechanism capable of coupling the joining member and the vehicle interior floor. 5.

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