JPH0628036Y2 - Seat structure in vehicle - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a seat structure in a vehicle.

(B) Conventional Technology Conventionally, in seats for medium-distance buses, trains, etc., a backrest is tiltably erected at the rear of the seat so that the backrest can be used for reclining.

Then, such seats are arranged at regular intervals in the front-rear direction, and passengers seated in the respective seats maintain a comfortable sitting posture by inclining their backrests at a desired tilt angle and reclining. I am able to do that.

Further, such a seat allows the passenger to take a recumbent posture on the seat by tilting the back portion as far back as possible and maximizing the bending angle formed by the back portion and the seat portion. I have to.

(C) Problems to be solved by the invention However, with the above-mentioned seats, all passengers take a recumbent posture on the seats. At night, etc., the backrest is tilted backward as much as possible to take a recumbent posture. In this case, the backrest does not hinder passengers who are in a recumbent position in the seat immediately adjacent to them, but most of the passengers are in a sitting position. The backrest may interfere with passengers seated immediately adjacent to the seat immediately behind.

(D) Means for Solving the Problems In the present invention, therefore, the backrest is tilted to the rear of the seat.
It is a seat structure that is mounted so that it can be erected upright, a lock mechanism for holding the backrest in an arbitrary tilt position is provided on the backrest, and a maximum tilt angle changing mechanism for the backrest provided on the lock mechanism. Restricting the shortening operation of the cylinder rod by locking / releasingly locking the rod shortening restricting body forming part of the maximum tilt angle changing mechanism to the cylinder rod of the lock cylinder forming part of The present invention is to provide a seat structure in a vehicle characterized in that the maximum tilt angle of the backrest can be changed.

(E) Operation and effect In the present invention, since the seat that can be used for reclining by the lock mechanism is provided with the maximum tilt angle changing mechanism for selectively changing the maximum tilt angle of the backrest, most of the During daytime driving when passengers take a seated position on the seat, the rod shortening regulator that forms part of the maximum tilt angle changing mechanism is locked and unlocked on the cylinder rod of the lock cylinder that forms part of the locking mechanism. By freely locking and mechanically restricting the shortening operation of the cylinder rod, the maximum tilt angle of the backrest part is changed to a smaller one so that it is not possible to take a recumbent posture on the seat, Immediately afterwards, it is possible to avoid any hindrance to passengers.

In addition, at the time of night driving, etc., a method of increasing the maximum tilt angle of the backrest by unlocking the rod shortening restricting body locked to the cylinder rod to release the restriction on the shortening operation of the cylinder rod. To allow all passengers to lie on their seats in a recumbent position for a good night's sleep.

(F) Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

FIG. 1 is an overall side view of a seat (A) in a vehicle according to the present invention, and FIG. 2 is a partially enlarged side view of the seat (A).

In FIG. 1, (10) is a seat support machine frame erected on the floor surface (F) of the vehicle, which is formed by welding and assembling a steel pipe.

Further, (11) is a seat part which is placed on the upper part of the seat support machine frame (10) and is provided with armrest parts (12) and (12) on both sides. It is thicker than.

Further, (13) is a backrest that is erected upward from the rear of the seat (11), and the backrest (13) has its lower end provided at the rear of the seat support frame (10). It is attached to the armrest portion (12) by a pivot shaft (14) so as to be tilted and raised in the front-rear direction.

Further, (15) is a footrest placed in front of the seat (11).

In the seat (A) having such a basic structure, the rear portion of the seat portion (11) can be raised.

That is, as shown in FIG. 2, the base end of a bracket (20) extending forward is fixedly connected to the upper end of the front portion of the seat support frame (10), and the extension end of the bracket (20) is connected to the base end. Seat (11)
The lower end of a pivot bracket (21) protruding from the front part of the bottom plate (11a) of the base plate is connected by a pivot shaft (22).

With such a configuration, the rear portion of the seat portion (11) can rotate in the up-down direction around the pivot shaft (22).

On the other hand, the upper end of the interlocking bracket (23) is connected to the rear part of the bottom plate (11a) of the seat part (11).
Is the backrest by the interlocking mechanism (M) explained below.
Interlocked with the tilting movement of (13), it moves up and down and the seat (1
1) The rear part can be raised upward.

That is, in this embodiment, as shown in FIG. 2, the interlocking mechanism (M) includes a roller guide rail (30) having a concave cross section at the rear extension end of the interlocking bracket (23) in a front low rear high state. In addition to being installed at an angle, the rolling roller (31) is movably arranged in the guide rail (30) along the guide rail (30), and the support shaft (32) of the rolling roller (31) is ), The backrest
Back side bracket (3) fixed to the lower surface (13a) of (13)
It is constructed by pivotally connecting to the lower end of 3).

With such a configuration, when the backrest portion (13) is tilted rearward with the pivot axis (14) as the tilt center, the backrest side bracket (33) is also tilted integrally with the tilt (13) in conjunction with the tilt. The rolling roller (31) pivotally supported at the lower end is the pivot (14).
It will rotate while drawing a rotation trajectory around.

The rolling track of the rolling roller (31) intersects the direction of the roller guide rail (30), so
(31) is rotating around the pivot axis (14) and moves in the roller guide rail (30), whereby the roller guide rail (30) and the interlocking bracket (23) integral with the roller guide rail (30).
Will also move upwards. By this movement, the seat part fixedly connected to the upper part of the interlocking bracket (23)
(11) rotates around the pivot (22) in the vertical direction, and the rear part is raised.

Therefore, the angle formed by the seat portion (11) and the backrest portion (13), that is, the bending angle (θ), can be made larger than that when only the backrest portion (13) is tilted, Passengers can sit more comfortably and can easily take a resting posture.

Further, in this embodiment, the interlocking mechanism (M) is provided with the lock mechanism (L) in order to hold the backrest (13) at an arbitrary tilt angle.

That is, in FIG. 2, (40) is a lock cylinder arranged in parallel below the bottom plate (11a) of the seat portion (11), and the lock cylinder (40) has its base end rolling roller (31). Is connected to the support shaft (32) of the seat support machine, and its tip is supported by the rear vertical part (41a) of the bracket (41) protruding from the upper end of the front part of the seat support machine frame (10).

Further, the bracket (41) is provided at a position facing the tip of the lock cylinder (40) at the rocking lever (42) for releasing the lock cylinder.
Is arranged to be swingable. And the swing lever (42)
The upper end of the is pivotally supported by the bracket (41), and the lower end thereof is connected to the release operation knob (43) provided on the inner wall of the armrest part (12) via the Bowden cable (44) (first See figure).

With this configuration, the release operation knob (4
When you operate 3), the rocking lever (42) will lock the lock cylinder (40).
The passenger can easily tilt the backrest (13) by activating the lock to release the lock. Then, if the release operation knob (43) is returned to the original position at an arbitrary tilted position, the lock cylinder (40) operates again to fix the backrest (13) at the tilted position.

As described above, in this embodiment, since the rear portion of the seat portion (11) is raised and the seat portion (11) can be tilted, the seat portion (13) cooperates with the tilting of the backrest portion (13). 11) Rear upper surface and backrest (13)
The bending angle (θ) formed between the lower front surface of the passenger can be set as large as possible, the sitting comfort can be significantly improved, and the passenger can approach the sleeping posture. You can even sleep on the seat.

Further, other structural features of this embodiment will be described as follows.

Further, as shown in FIG. 1, the backrest portion (13) is provided with a raising device (60) formed of an eccentric cam or the like in a headrest portion (13b) formed on the upper portion thereof. By driving (60), it is possible to form a head support surface that matches the shape of the head.

Further, in this embodiment, the footrest (15) can be moved between the use position indicated by the solid line and the storage position indicated by the alternate long and short dash line via the footrest extension mechanism (N), and The footrest extension mechanism (N) is provided with a lock mechanism (O) similar to the interlocking mechanism (M) described above.

In the seat (A) having the reclining structure as described above, the gist of the present invention is to change the maximum tilt angle of the lock mechanism (L) to selectively change the maximum tilt angle of the backrest (13). The mechanism (P) is provided and will be described below with reference to FIGS. 3 to 5.

That is, the maximum tilt angle changing mechanism (P) includes the operation lever (80) provided on the outer surface of the left armrest (12) and the lever (8).
(0) is locked by the locking pin (81), and the locking pin (8)
It is composed of a rod shortening restricting body (82) that moves forward by an urging spring (83) in conjunction with unlocking by (1) .The rod engaging piece (82) provided at the tip of the restricting body (82). 82a)
Engages with the tip end portion of the piston rod (40a) of the lock cylinder (40) provided in the lock mechanism (L) so that the shortening operation of the piston rod (40a) can be restricted. . (40b) is a cylinder rod tip connecting portion, (84) is a locking pin insertion hole, (85) is a forward locking pin receiving plate, and (86) is a backward locking pin receiving plate.

With this configuration, when the lock cylinder (40) is restricted from being shortened and the maximum tilt angle of the backrest (13) is changed to a smaller one, the operation lever (80) is rotated to operate the locking pin. By aligning (81) with the locking pin through hole (84) and inserting it through the locking pin through hole (84), the rod shortening regulator (82) is orthogonal to the lock cylinder (40). The rod engaging piece (82a) provided at the tip of the restricting body (82) is engaged with the tip end portion of the pistun rod (40a) of the lock cylinder (40) by sliding forward in the direction indicated by the arrow.

At this time, the rod shortening restricting body (82) can be smoothly slid forward by the urging force of the urging spring (83).

Further, when the rod engaging piece (82a) provided at the tip of the rod shortening restricting body (82) is engaged with the piston rod (40a), the tip of the locking pin (81) moves to the advance locking pin receiving plate ( 85),
An excessive pressing force acts on the pistun rod (40a) by the regulation body (82) biased by the biasing spring (83) to regulate the forward sliding of the rod shortening regulation body (82),
It is possible to prevent the rod (40a) from being deformed or damaged.

Further, when the lock cylinder (40) shortening restriction as described above is released and the maximum tilt angle of the backrest (13) is changed to a larger one, the operation lever (80) is grasped, Slide the rod shortening regulator (82) backwards against the urging force of the urging spring (83), and pull out the locking pin (81) from the locking pin insertion hole (84). Rotate (80) around the rod shortening restrictor (82) to lock pin (81).
The tip end of the rod is brought into contact with the retracting locking pin receiving plate (86) to hold the rod shortening restricting body (82) in the retracted restricting release device.

In this way, when the rod engagement piece (82a) restricts the shortening operation of the piston rod (40a), it is possible to restrict the rearward tilt of the backrest portion (13) by a certain angle or more, and the passenger lays down. It is possible to disable the use of reclining for taking. The change operation of the regulation and the release of the regulation is performed, for example, when the daytime operation and the nighttime operation are changed.

Further, (R) shown in FIGS. 6 to 10 is a maximum tilt angle changing mechanism as another embodiment, and the maximum tilt angle changing mechanism (R) will be described below with reference to the drawings.

That is, the maximum tilt angle changing mechanism (R) includes a machine frame (90) attached to the inner side surface (12a) of the left armrest (12) immediately below the seat (11), and the machine frame (90). The operating lever (91) inserted in the hook-shaped lever guide groove (90a) provided in the lower part and the vertically elongated guide groove (90b) provided in the upper part of the machine frame (90) are vertically slidable. And a rod shortening restricting body (93) linked to the base end of the operating lever (91) through a link (92), and the restricting body (93).
Attach the rod engagement piece (93a) provided at one end of the lock cylinder (4
It is composed of a tension spring (94) that pulls downwardly so as to engage with the tip of the piston rod (40a) of (0). (90c) is a mounting hole for mounting the machine frame (90) on the inner surface (12a) of the armrest part (12).

With this configuration, when restricting the shortening operation of the lock cylinder (40), the operation lever (91) is moved to the lever guide groove (90a).
The rod engagement piece (93a) provided at the tip of the rod shortening restriction body (93) is engaged with the tip of the piston rod (40a) of the lock cylinder (40) by sliding it down along the .

At this time, the rod shortening restricting body (93) can be smoothly slid down by the tensile force of the tension spring (94).

When the rod engagement piece (93a) provided at the tip of the rod shortening restrictor (93) is engaged with the piston rod (40a), the operation lever (91) contacts the lower end of the lever guide groove (90a). In contact with the rod shortening regulator (93), the regulator (93) pulled by the tension spring (94) to regulate the downward sliding of the rod shortening regulator (93).
Thus, it is possible to prevent excessive pressing force from acting on the piston rod (40a) and causing deformation or damage to the rod (40a).

Also, when releasing the lock cylinder (40) restriction for shortening as described above, place the operation lever (91) in the lever guide groove (9
0a), the rod shortening regulator
(93) is slid upward against the tensile force of the tension spring (94) to release the engagement between the rod engagement piece (93a) and the piston rod (40a), and the operation lever (91). Lever guide groove
By laterally sliding along the (90a), the rod shortening restricting body (93) is held at the restricting release position.

Further, as a means for selectively changing the maximum tilting angle of the backrest portion (13) as described above, a regulation pin (not shown) that can be retracted in the armrest portion (12) toward the backrest portion (13). There is also a means for selectively changing the maximum tilt angle of the backrest (13) by advancing the regulating pin.

In addition, in this embodiment, as shown in FIGS. 1, 2, 11, and 12, a concave toe insertion portion (61) having an open rear surface is formed in the lower back portion of the backrest portion (13). The footrest portion (70) is provided so as to project rearward from the lower end edge of the same foot tip insertion portion (61).

That is, the toe insertion part (61) hollows out the lower part of the backrest part (13) into a concave shape with an opening on the rear surface to form a toe insertion space (62) into which the toes can be inserted, and to the left and right armrests. Department
(12) The left and right foot tip insertion spaces (63) (63 ') where the rear surface is also hollowed out in the rear part of the (12) to insert the toes
Are formed and configured.

In this way, the toe insertion part (61) has a lateral width of the seat.
The width is approximately the same as the width of (A).

The front wall of the toe insertion portion (61) is formed by a toe cover (64) that is curved forward in a convex shape.
The rear ends of the support arms (65) (65) provided on the left and right sides of the (64) are attached to a pivot shaft (14) that pivotally supports the backrest portion (13).

In addition, the foot rest (70) is the foot insertion part configured as described above.
It is provided on the lower edge of (61), and the foot rest (70)
Is a pivot (14) that supports the backrest (13) so that it can tilt forward and backward.
In addition, the left and right footrest support arms (71) (71) are pivotally supported at their base ends, and a rectangular shape capable of completely closing the rear surface of the foot insertion part (61) between the tips of both arms (71) (71). A plate-shaped footrest plate (72) is fixed.

Moreover, the foot rest (70) is configured so that the foot rest (72) is erected from the horizontal use state to the stored state in which the foot rest plate (72) is brought into contact with the back surface of the backrest portion (13). Footboard (72)
The height from the floor surface of the seat is approximately the same as the front end of the lower surface of the seat (11), and in the standing storage state, the foot tip insertion part
(61) The entire rear surface can be closed. (13c) is a hook-and-loop fastener for holding the footrest plate (72) in an upright storage state. (Q) is the passenger's foot.

(73) is a stopper body mounted on the seat support frame (10) so as to be adjustable forward and backward, and the rear end surface (73a) of the stopper body receives the front surface (72a) of the footrest plate (72) in a horizontal use state. , Keeps the foot plate (72) horizontal.

Thus, the foot rest (70) is connected to the pivot (14) of the backrest (13).
Since it is pivotally supported, the footrest (70) does not move back and forth when the backrest (13) is tilted back and forth,
It is possible to secure the use of foot in a fixed position.

Therefore, even if a passenger sitting in the adjacent front seat (A) reclines and uses the backrest portion (13) backward, the passenger seated in the rear seat (A) is
Without being affected by the usage pattern of the front seat (A), place your foot on the footrest plate (72) provided on the back of the backrest (13) of the same seat (A), and put your toes It can be inserted into the insertion portion (61) to take a comfortable posture.

At this time, since the toe insertion part (61) and the footrest plate (72) are formed to have a lateral width substantially equal to the lateral width of the seat (A), the degree of freedom for mounting the passenger's foot (Q). Becomes larger, and the degree of freedom in the sitting posture also becomes larger.

Further, by forming the toe insertion portion (61) as described above, in this embodiment, in order to ensure the cushioning function of the backrest portion (13), an auxiliary cushion is provided on the lower front surface of the backrest portion (13). The part (75) is attached, and the auxiliary cushion part (75) can fill the gap between the seat part (11) and the lower front surface of the backrest part (13) that occur when the backrest part (13) is tilted. I am trying.

Therefore, it is possible to prevent the passenger's buttocks from falling into the above-mentioned gap, and it is possible to support the buttocks in a stable state and perform a cushioning function even when using the reclining.

[Brief description of drawings]

FIG. 1 is a side view of a seat in a vehicle according to the present invention, and FIG.
The figure is a partially enlarged side view of the seat, FIG. 3 is a side view of the operating lever of the maximum tilt angle changing mechanism, FIG. 4 is a plan view of the regulating mechanism, FIG. 5 is a front view of the regulating mechanism, and FIG. 6 is a partially enlarged side view of a seat having a maximum tilt angle changing mechanism as another embodiment, FIG. 7 is a partial front sectional view of the seat, and FIG. 8 is a side view of the maximum tilt angle changing mechanism. 9 and 10 are rear sectional views of the maximum tilt angle changing mechanism, FIG. 10 is a plan view of the maximum tilt angle changing mechanism, and FIG. 11 is a rear view of the seat.
The drawing is a cross-sectional view taken along the line I-I of FIG. In the figure, (A): Seat (P) (R): Maximum tilt angle changing mechanism (10): Seat support frame (11): Seat (12): Armrest (13): Backrest (61): Toe insertion part (70): Foot rest part

Claims (1)

[Scope of utility model registration request] 1. A backrest (13) is tilted to the rear of the seat (11).
Mount it upright and attach it to the backrest (13) and backrest (1
A seat structure in which a lock mechanism (L) for holding 3) in an arbitrary tilt position is provided, and the lock mechanism (L) is provided with a maximum tilt angle changing mechanism (P) for the backrest (13), Lock / unlock the rod shortening regulator (82) that forms part of the maximum tilt angle changing mechanism (P) on the cylinder rod (40a) of the lock cylinder (40) that forms part of the lock mechanism (L) A seat structure in a vehicle characterized in that the maximum tilt angle of the backrest (13) can be changed by freely locking and restricting the shortening operation of the cylinder rod (40a).