JP2007083826A - Tumble seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tumble seat having a hinge mechanism which can rotate a seat cushion between a seating position and a tip-up position, a lock mechanism provided with an engaged member at one of a seat and a floor and an engaging member detachable from the engaged member at the other, and banning the rotation of the seat cushion by engaging the engaging member with the engaged member when the seat is located in the seating position, and first energization means energizing the seat cushion to the tip-up position direction, capable of surely unlocking the lock mechanism, and preventing an operating force when it is returned from the tip-up position to the seating position from increasing. <P>SOLUTION: There is provided with a second energization means for energizing the seat cushion 53 in a direction where a hook 107 is separated from a striker only while the hook (engaging member) 107 of a lock mechanism 101 is engaged with the striker (engaged member) 109 till it is detached. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides the seat between a seating position provided between a seat cushion of a seat and a floor and capable of being seated on the seat cushion, and a flip-up position where the seat cushion is flipped up with respect to the floor. A hinge mechanism that enables rotation of a cushion, an engaged member on one of the seat and the floor, and an engaging member that can be engaged with and disengaged from the engaged member on the other are provided. A locking mechanism that engages the engaged member to inhibit rotation of the seat cushion when in the seating position, and a first attachment that biases the seat cushion toward the flip-up position. And a tumble sheet having a biasing means.

  An example of such a tumble sheet will be described with reference to FIGS. As shown in FIG. 5, the seat S includes a seat cushion SC that supports a seated person's buttocks and a seat back SB that supports the seated person's back.

  Between the front part of the lower surface of the seat cushion SC and the floor F, a seating position (indicated by a solid line position in the figure) where the seat cushion SC can be seated, and a jump in which the seat cushion SC is flipped up with respect to the floor F A hinge mechanism 1 is provided that allows the seat cushion SC to rotate between a raised position (indicated by a two-dot chain line in the figure).

  Further, a striker as an engaged member is provided on the floor side, and an engaging member such as a hook that can be engaged with and disengaged from the striker is provided at the rear portion of the lower surface of the seat cushion SC so that the seat cushion SC is in a seating position. The lock mechanism L is provided that prevents the rotation of the seat cushion SC by engaging the engaged member with the engaged member.

  As shown in FIG. 6, the hinge mechanism 1 is provided on the floor F and the upper tumble 2 having a first base 2 a provided on the lower surface of the seat cushion SC and a first side wall 2 b erected in the floor F direction. The lower tumble 3 having the second base portion 3a and the second side wall portion 3b which is erected in the sheet S direction and faces the first side wall portion 2b, and the upper tumble 2 is inserted through the first side wall portion 2b and the second side wall portion 3b. , And a hinge pin 4 for rotatably connecting the lower tumble 3.

An intermediate portion of the torsion spring 5 as the first urging means is wound around the hinge pin 4. One end of the torsion spring 5 is locked to the first base 2a of the upper tumble 2 using a fixing plate 5a, and the other end is a stopper pin provided on the second side wall 3b of the lower tumble 3 6 abuts. When the seat cushion SC is in the seated position (solid line position in FIG. 5), the torsion spring 5 pushes the first base portion 2a of the upper tumble 2 to raise the seat cushion SC in the direction of the position (two-dot chain line from the solid line position in FIG. 5). The position is biased (for example, see Patent Document 1).
JP 2001-63418 A (FIGS. 1 and 5)

  However, when the weight of the sheet S is heavy or when the rotational resistance of the hinge mechanism 1 is large (the sliding resistance between the hinge pin 4 and the upper tumble 2 and the lower tumble 3 is large), the torsion as the first biasing means There is a problem that the seat S cannot be flipped up only by the urging force of the spring 5 and the lock state of the lock mechanism L cannot be released.

  In this case, when the urging force of the torsion spring 5 is increased, the locked state of the lock mechanism L can be released. However, there is a problem that the operation force when the seat cushion SC is returned from the flip-up position to the seating position is increased. is there.

  The present invention has been made in view of the above-described problems, and its object is to provide a tumble seat that can reliably unlock the lock mechanism and does not increase the operating force when returning from the flip-up position to the seating position. There is.

  The invention according to claim 1, which solves the above-described problem, is provided between a seat cushion of a seat and a floor, and a seating position where the seat cushion can be seated, and the seat cushion is flipped up with respect to the floor. A hinge mechanism that allows the seat cushion to rotate between a flip-up position, an engagement member on one of the seat and the floor, and an engagement that can be engaged and disengaged on the engagement member on the other A lock mechanism for engaging the engaging member with the engaged member and prohibiting the rotation of the seat cushion when the member is provided and the seat cushion is in the seating position; And a first urging means for urging in a direction, wherein the engaging member of the locking mechanism is disengaged from the engaged state with the engaged member. Only until a tumble sheet, characterized in that said engaging member is provided with second biasing means for biasing the seat cushion in a direction away from the engaged member.

By the hinge mechanism, the seat cushion is rotatable between a seating position where the seat cushion can be seated and a flip-up position where the seat cushion is flipped up with respect to the floor.
When the seat cushion is in the seating position, the engaging member of the lock mechanism is engaged with the engaged member, and the rotation of the seat cushion is prohibited.

  When the lock mechanism is unlocked, the seat cushion is rotated toward the flip-up position by releasing the hinge mechanism by the urging force of the first urging means and the urging force of the second urging means. At this time, the first urging means urges the seat cushion in the flip-up position direction, and the second urging means is in a state where the engaging member of the lock mechanism is engaged with the engaged member. The seat cushion is urged in the direction in which the engaging member separates from the engaged member only until it is released.

  According to a second aspect of the present invention, the second urging means is a spring that is set so that one end side is held by the seat cushion and the other end side is pressed against the floor side in the seating position. The tumble sheet according to claim 1.

  The invention according to claim 3 is the tumble seat according to claim 2, wherein the spring presses an engaged member provided on the floor side.

  According to the first to third aspects of the present invention, the second urging means for urging the seat cushion in a direction in which the engaging member moves away from the engaged member is provided, thereby securely locking. The mechanism can be unlocked.

  Further, the second urging means is a direction in which the engaging member is separated from the engaged member only until the engaging member of the lock mechanism is released from the state of being engaged with the engaged member. The seat cushion is biased. Therefore, when returning from the flip-up position to the seating position, until the engagement member of the lock mechanism starts to engage the engaged member, the operation force is sufficient to resist the first biasing means. It is the same.

  When the engagement member of the lock mechanism starts to engage with the engaged member, an operation force against the urging force of the second urging means is further required. In this state, the rotational moment due to the weight of the seat is maximized, and the direction of the rotational moment is a direction that cancels the urging force of the second urging means, so that the operating force does not increase.

  According to the second aspect of the present invention, the second urging means is a spring set so that one end side is held by the seat cushion and the other end side presses against the floor side in the seating position. Therefore, it is inexpensive and reliably operates as the second urging means when the lock mechanism is unlocked.

  According to the invention which concerns on Claim 3, the said spring does not damage a floor by pressing the to-be-engaged member provided in the said floor side.

  Initially, the whole structure of the tumble sheet | seat of this embodiment is demonstrated using FIG. The seat 51 includes a seat cushion 53 that supports the seated person's buttocks and a seat back 55 that supports the seated person's back.

  In the present embodiment, the seat cushion 53 is provided on the seat track 41. The seat track 41 includes a lower rail 43 provided on the floor F, an upper rail 45 that is movably engaged with the lower rail 43 and provided with a seat cushion 53, and a lock mechanism (not shown) that prohibits the movement of the upper rail 45. Yes.

  A hinge mechanism 57 that allows the seat cushion 53 to rotate with respect to the floor F is provided between the floor F and the front portion of the lower rail 43 (seat cushion 53) of the seat track 41. The hinge mechanism 57 includes a lower tumble 59 provided on the floor side, an upper tumble 61 provided on the lower surface of the front portion of the seat cushion 53, and a hinge pin 63 through which the lower tumble 59 and the upper tumble 61 are inserted.

  As in FIG. 5, the hinge mechanism 57 allows the seat 51 to be seated on the seat cushion 53 (the state shown in FIG. 1), and the seat cushion 53 is flipped up with respect to the floor F. It can be rotated between positions.

  Further, the torsion spring (first urging means) in which the intermediate portion is wound around the hinge pin 63, one end side is attached to the upper tumble 61, and the other end side abuts on the pin 65 provided on the lower tumble 59. 67, the seat cushion 53 is urged toward the flip-up position.

  A lock mechanism 101 is provided between the floor F and the rear portion of the seat track 41 to prohibit the rotation of the seat cushion 53 when the seat cushion 53 is in the seating position (the state shown in FIG. 1).

  Here, the lock mechanism 101 will be described with reference to FIG. 2 which is a cross-sectional view taken along the cutting line AA of FIG. 1 and FIG. On the floor F, a striker 109 as an engaged member is provided.

  Two brackets 103 and 104 are provided at intervals on the bottom surface of the rear portion of the lower rail 43. A hook 107 as an engaging member is rotatably provided between the brackets 103 and 104 using a pin 105. The hook 107 is formed with a lock protrusion 107b and a lock groove 107a with which a striker 109 provided on the floor F can be engaged. The hook 107 is urged in the direction of arrow D in FIG. 1 by a spring (not shown).

  Between the brackets 103 and 104, a ratchet 111 having a lock protrusion 111 a that can be engaged with and disengaged from the lock protrusion 107 b of the hook 107 is disposed adjacent to the hook 107. The ratchet 111 is rotatably provided on the pins 112 on the brackets 103 and 104. The ratchet 111 is urged by a spring (not shown) in the direction of arrow E in FIG. 1, that is, the ratchet 111 is also biased in a direction in which the lock protrusion 111 a engages with the lock protrusion 107 b of the hook 107.

  Then, by rotating the ratchet 111 in the direction opposite to the arrow E direction by a lock release operation lever (not shown), the engagement between the lock groove 107a of the hook 107 as the engaging member and the striker 109 as the engaged member is performed. It is to be released. That is, the lock mechanism 101 is unlocked.

  Next, as shown in FIGS. 1 and 2, the bracket 103 of the lock mechanism 101 is engaged with the striker 109, which is the engaged member, from the hook 107 that is the engaging member of the lock mechanism 101. A mechanism (hereinafter referred to as a tumble assist mechanism 200) having second urging means for urging the seat cushion 53 in a direction in which the hook 107 is separated from the striker 109 is provided only until the detachment.

The tumble assist mechanism 200 will be described with reference to FIGS. FIG. 3 is an exploded perspective view of the tumble assist mechanism 200.
As shown in FIG. 2, the bracket 103 is provided with a mechanism in which the second urging means is provided. As shown in FIG. 3, the mechanism includes a first bracket 201 attached to the bracket 103, a second bracket 203 attached to be stacked on the first bracket 201, a first bracket 201, The slider bracket 207 provided between the two brackets 203 and a spring 213 that biases the slider bracket 207.

  The first bracket 201 attached to the bracket 103 includes a base portion 201a that contacts the bracket 103, a top portion 201b that bends in a direction away from the bracket 103 from the upper portion of the base portion 201a, and a bracket portion 103 that is separated from both sides of the base portion 201a. First side part 201c and second side part 201d that are bent in the direction, and first side part 201c and second side part 201d that are bent and extend in a direction parallel to the bracket 103. Mounting portion 201e and second mounting portion 201f.

  The second bracket 203 attached so as to be stacked on the first bracket 201 includes a first attachment portion 203e attached to the first attachment portion 201e of the first bracket 201, and a first bracket 201 of the first bracket 201. A second attachment portion 203f attached to the second attachment portion 201f, a first side portion 203c bent in a direction away from the bracket 103 from the first attachment portion 203e, and a bracket 103 from the second attachment portion 203f. It consists of a second side portion 203d that bends in a direction away from it, and a base portion 203a formed between the first side portion 203c and the second side portion 203d. The base 203a of the second bracket 203 faces the base 201a of the first bracket 201, and is shared with the base 201a, the top 201b, the first side 201c, and the second side 201d of the first bracket 201. Thus, a space having an open surface formed in the lower portion is formed and serves as a guide for guiding the slider bracket 207.

  The slider bracket 207 has a base 201a of the first bracket 201 and a base 207a facing the base 203a of the second bracket 203. Furthermore, it bends in the direction which approaches the bracket 103 from the both sides of the base part 207a, the 1st side part 201c of the 1st bracket 201, the 2nd side part 201d, and the 1st side part of the 2nd bracket 203 203c, a first side portion 207c and a second side portion 207d facing the second side portion 203d are formed, and a bottom portion 207b bent from the lower portion of the base portion 207a toward the bracket 103 is formed. .

  In addition, a long hole 203g extending in the vertical direction is formed in the base 203a of the second bracket 203. A neck portion 211b of a pin 211 having a head portion 211a having a diameter larger than the width of the long hole 203g is inserted through the long hole 203g, and is caulked and fixed to a hole 207g of the base portion 207a of the slider bracket 207. Therefore, the slider bracket 207 can move within a range in which the pin 211 contacts the upper end and the lower end of the long hole 203g. Further, the bottom portion 207b of the slider bracket 207 can come into contact with the striker 109 when the seat cushion 53 is in the seating position.

  The slider bracket 207 is urged downward by a spring 213 whose upper end abuts on the top 201b of the first bracket 201 and whose lower end abuts on the bottom 207b of the slider bracket 207. The spring 213 of this embodiment is a coil spring made of a substantially rectangular ring. When the seat cushion 53 is in the seating position, the spring 213 is elastically deformed in the axial direction, and the bottom portion 207 b of the slider bracket 207 is pressed against the striker 109. In this embodiment, in order to reduce the impact sound when the bottom portion 207b of the slider bracket 207 and the striker 109 are pressed against each other, the cushion material 215 is provided on the surface side facing the floor of the bottom portion 207b of the slider bracket 207. It is attached.

  The spring 213 is set so that one end side is held by the seat cushion 53 and the other end side is pressed against the floor side in the seating position, and the hook 107 of the lock mechanism 101 is engaged with the striker 109. The hook 107 functions as a second urging unit that urges the seat cushion 53 in a direction away from the striker 109 only until it is released.

  Next, operation of the above configuration will be described. In the state shown in FIG. 1, the seat cushion 53 is in the seating position, the lock mechanism 101 is in the locked state, and the seat 51 is prohibited from rotating in the flip-up direction.

  At this time, the lock mechanism 101 is such that the striker 109 on the floor F side is engaged with the lock groove 107a of the hook 107 on the seat cushion 53 side. Furthermore, the lock protrusion 107b of the hook 107 engages with the lock protrusion 111a of the ratchet 111, and the hook 107 is further prohibited from rotating in the direction of arrow D and the ratchet 111 in the direction of arrow E (locked state).

  Here, when the unlocking lever (not shown) is operated to rotate the ratchet 111 in the direction opposite to the direction of arrow E in FIG. 1, the engagement between the lock protrusion 107b of the hook 107 and the lock protrusion 111a of the ratchet 111 is released. Is done. The hook 107 rotates in the direction of arrow D, and the engagement between the striker 109 and the lock groove 107a of the hook 107 can be released (lock release state), and the seat cushion 53 can rotate in the flip-up direction.

  Then, the seat 51 is moved up by the urging force of the torsion spring (first urging means) 67 of the hinge mechanism 57 and the urging force of the spring (second urging means) 213 of the tumble assist mechanism 200. Rotate towards

  At this time, the torsion spring (first urging means) 67 of the hinge mechanism 57 urges the seat cushion 53 in the flip-up position direction, and the spring (second urging means) 213 of the tumble assist mechanism 200 is Only when the hook (engagement member) 107 of the lock mechanism 101 is engaged with the striker (engaged member) 109 until it is released, the hook 107 urges the seat cushion 53 in the direction away from the striker 109. To do.

  Conversely, when the seat cushion 53 in the flip-up position is returned to the seating position, the seat cushion 53 is rotated to the vicinity of the seating position against the biasing force of the torsion spring (first biasing means) 67 of the hinge mechanism 57. Let Further, until the hook 107 of the lock mechanism 101 starts to engage with the striker 109 and until it engages, an operation force that resists the urging force of the spring (second urging means) 213 is further required.

According to such a configuration, the following effects can be obtained.
(1) By providing the spring (second urging means) 213 that urges the seat cushion 53 in the direction in which the hook 107 moves away from the striker 109, the lock mechanism 101 can be reliably unlocked.
(2) The spring (second urging means) 213 is configured so that the seat cushion 53 extends in a direction in which the hook 107 is separated from the striker 109 only until the hook 107 of the lock mechanism 101 is released from the state in which the hook 107 is engaged with the striker 109. Energize. Therefore, when returning from the flip-up position to the seating position, the operation force is sufficient to resist the torsion spring (first biasing means) 67 until the hook 107 of the lock mechanism 101 starts to engage the striker 109. This is the same as in the prior art.

When the hook 107 of the lock mechanism 101 starts to be engaged with the striker 109, an operation force against the biasing force of the spring (second biasing means) 213 is further required. Is in a state where the rotational moment due to the weight of the seat 51 is maximized, and the direction of the rotational moment is a direction in which the biasing force of the spring (second biasing means) 213 is canceled. Power does not increase.
(3) The second urging means is inexpensive because the one end side is held by the seat cushion 53 and, in the sitting position, the spring 213 is set so that the other end side presses the floor side. When the lock mechanism 101 is unlocked, the lock mechanism 101 operates reliably as the second urging means.
(4) The spring 213 does not damage the floor F by pressing the striker 109 which is an engaged member provided on the floor side.

  The present invention is not limited to the above embodiment. In the above-described embodiment, the second urging means is a coil spring having a substantially rectangular shape. However, as shown in FIG. 4, a circular coil spring having a circular shape may be used.

  In the figure, reference numeral 301 denotes a U-shaped bracket provided on the seat cushion side. The base 301a of the bracket 301 is attached to the seat cushion side, and holes 301d and 301e are formed in the upper surface 301b bent from the upper part of the base 301a and the lower surface 301c bent from the lower part of the base 301a. A cylindrical pipe 303 is disposed between the upper surface 301b and the lower surface 301c of the bracket 301. The neck 305b of the rod 305 having a head 305a larger than the diameter of the hole 301e of the bracket 301 is inserted through the hole 301e of the bracket 301, the pipe 303, and the hole 301d of the bracket in this order. A groove 305c is formed in a portion of the rod 305 protruding from the bracket hole 301d. The E-ring 307 is engaged with the groove 305c to prevent the rod 305 from coming off. The rod 305 is biased downward by a spring 331 whose lower end abuts on the head 305 a of the rod 305 and whose upper end abuts on the lower surface 301 c of the bracket 301. The spring 331 is set so that one end side is held by the seat cushion and the head (the other end side) 305a is pressed against the floor side in the seating position, and the hook of the lock mechanism is engaged with the striker. The hook functions as a second urging means for urging the seat cushion in a direction away from the striker only until the hook is released from the state.

It is a figure explaining the whole structure of the tumble sheet | seat of a form example. It is sectional drawing in the cutting line AA of FIG. FIG. 3 is an exploded perspective view of the tumble assist mechanism of FIG. 2. It is a figure explaining the other form example. It is a figure explaining the whole structure of the conventional tumble sheet. It is a figure explaining the hinge mechanism of FIG.

Explanation of symbols

53 Seat cushion 101 Lock mechanism 107 Hook 109 Strike

Claims (3)

Provided between the seat cushion and the floor of the seat, the seat cushion can be rotated between a seating position where the seat cushion can be seated and a flip-up position where the seat cushion is flipped up with respect to the floor And a hinge mechanism
One of the seat and the floor is provided with an engaged member, and the other is provided with an engaging member that can be engaged and disengaged with the engaged member, and when the seat cushion is in the seating position, the engaging member A locking mechanism that engages with the engaged member and prohibits rotation of the seat cushion;
First urging means for urging the seat cushion toward the flip-up position;
In the tumble sheet having
Only when the engaging member of the locking mechanism is released from the state of being engaged with the engaged member, the engaging member biases the seat cushion in a direction away from the engaged member. 2. A tumble sheet comprising two urging means.   2. The second urging means is a spring which is set so that one end side is held by the seat cushion and the other end side is pressed against the floor side in the seating position. The tumble sheet described.   The tumble seat according to claim 2, wherein the spring presses an engaged member provided on the floor side.

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