JP2010221861A - Seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat device capable of reducing invasions to a living space of a rear seat by a backrest even in a reclining state, maintaining comfortableness even if sitting over a long period of time, and satisfying an existing safety standard while keeping low costs even when a shell is fixed. <P>SOLUTION: The seat device includes a base frame 60 for holding the backrest 20 and a seat part 30 moved associated with the tilting of the backrest 20 and a spreader 100 and a connection plate 310 for limiting the moving amount of the backrest 20 moving to the rear part within a prescribed amount and limiting the change of the relative posture of the backrest 20 and the seat part 30 within a prescribed range when the backrest 20 is tilted. Also, shock absorbing means is provided to absorb a shock load and limit the moving amount of the shell 400 within a prescribed amount by tilting the shell 400 forward when emergency shocks are applied to a shell 400 from a back. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, a shell is fixedly disposed on the rear surface side of a seat, and a seat portion is movably supported on the front surface side of the shell, and a backrest is supported so as to be tiltable. The present invention relates to a seat device in which the tilting of tilting and the movement of the seat portion are interlocked, and particularly to a seat device for a vehicle such as an aircraft or a vehicle.

2. Description of the Related Art Conventionally, there are some vehicle seat devices equipped in an aircraft, a vehicle, and the like that include a reclining mechanism for providing a comfortable sitting comfort.
In such a seat device, a seated person generally can recline the backrest held at the fulcrum by pushing the backrest backward with the back. In addition, there is a mechanism to which a slide mechanism for sliding the seat part back and forth is added.

  In general, in such a seat device, the backrest and the seat portion are connected by a link or the like, and the seat portion moves back and forth and up and down in conjunction with the movement of the backrest when reclining. With such a reclining mechanism, the seat device can change the sitting posture of the seated person, thereby providing the seated person with a feeling of rest and relaxation of the body.

  However, in the vehicle seat device, since the seats are arranged in a plurality of rows, the backrest moved rearward infringes the living space of the passenger sitting on the rear seat device during reclining. For this reason, depending on the movement amount of the backrest in the rear, the invasion of the living space of the passengers in the rear seats may become significant, and the passengers may be uncomfortable.

  In addition, as shown in FIG. 15, when reclining the seat backward, the angle between the backrest surface of the backrest and the seating surface of the seat portion changes so that the seater's clothes are lifted. As a result, there is a problem that the seated person feels uncomfortable feeling because the state is in a state of being lifted up as expected, or the change itself is an unnatural movement. Furthermore, from an ergonomic point of view, the pelvis tilts (rotates), so if the sitting time becomes longer, the burden on the lumbar vertebrae becomes larger, and fatigue may accumulate, resulting in a feeling of fatigue.

  Furthermore, as described above, in the case of a seat device in which the slide mechanism slides the seat part back and forth and up and down in conjunction with the backrest, the force of pushing the backrest with the back becomes difficult to enter as the tilt of the backrest increases. However, there is a problem that it is not easy to use for a weak seated person or a small seated person with a light weight.

  In view of the problems of the conventional seat apparatus as described above, the inventors of the present invention have little invasion to the living space of the rear seat due to the backrest even in the reclining state, and feel comfortable even if the sitting time becomes long. We have already proposed a seating device that can be maintained, does not cause the seating of the seated person to rise up during reclining, and can be easily reclined even by a weak seated person or a small seated person with a light weight. (See Patent Document 1).

  By the way, since the invasion to the living space of the rear seat due to the backrest is reduced, for example, a shell (back support) for partitioning the passenger living space can be fixedly arranged on the rear surface side of the seat. (See Patent Document 2). Mounting parts such as a TV monitor, a cup holder, and a small tray can be attached to the shell here.

  As a result, in a conventional general seat apparatus, the TV mounted on the back of the backrest is difficult to see each time the passenger in the front seat moves and reclining. Passengers sitting in the back seat without moving can relax with ease, and at the same time, it is possible to have comfort and comfort that secures a wider space regardless of the movement of passengers in the front seat Met.

JP 2005-211091 A

Special table 2007-513699 gazette

  However, regarding a seat device as described in Patent Document 1, if a shell as described in Patent Document 2 is equipped, for example, in a seat with a narrow front-rear pitch, such as an economy seat in an aircraft, the FAA standard / HIC Strict conditions are required to meet the head impact criteria of (Head Injury Criteria).

  Here, when the shell is fixedly arranged on the rear surface of the conventional seat, it is necessary to absorb the impact value by using an air bag type seat belt or the like. Since special equipment such as an air bag type seat belt is necessary for safety, there is a problem that it causes an increase in cost.

  The present invention has been made paying attention to the problems of the prior art as described above, and there is little invasion to the living space of the back seat due to the backrest, and it can maintain comfort even if the sitting time becomes long. In addition, the reclining operation does not cause the occupant's clothes to roll up, and the reclining operation can be easily performed. The purpose of the present invention is to provide a seat apparatus that does not require special equipment such as an air bag type seat belt, and that can satisfy the existing safety standards while reducing costs.

The gist of the present invention for achieving the above-described object resides in the following items.
[1] The shell (400) is fixedly arranged on the rear side of the seat, and the seat (30) is movably supported on the front side of the shell (400) and the backrest (20) is tiltably supported. In the seat device (10) in which the tilt of the backrest (20) and the movement of the seat (30) are interlocked with each other without interfering with the shell (400),
When the backrest (20) is tilted backward, the amount of tilting of the backrest (20) is limited to a predetermined range that does not interfere with the shell (400), and the backrest (20) and the seat portion Limiting means for maintaining a relative posture with (30);
When an emergency impact is applied to the shell (400) from the rear, the shell (400) is tilted forward to absorb the impact load, and the tilt amount of the shell (400) is within a predetermined range. Buffer means for limiting to, and
The restricting means is a connecting means (310) for connecting a seat back frame (200) constituting the backrest (20) and a bottom frame (300) constituting the seat (30) to form a main frame. And the change of the angle between the seat back frame (200) and the bottom frame (300) is limited to maintain the relative posture, and the tilting stroke of the backrest (20) is limited to limit the tilting amount. Comprising a guide frame (100) formed with a plurality of guide holes (101, 102, 103) for limiting the pressure within a predetermined range,
The main frame or the connecting means (310) is inserted into the plurality of guide holes (101, 102, 103) of the guide frame (100) to pass through the inside of the plurality of guide holes (101, 102, 103). A plurality of slidable insertion portions (210, 220, 320) are provided,
The seat device (10), wherein the plurality of guide holes (101, 102, 103) are formed in a shape that guides the displacement mode of the entire main frame in an arc shape like a swing of a cradle.

[2] The buffer means is configured to divide the guide frame (100) into two parts, support the bottom frame (300) movably, and pivotally support the seat back frame (200) in a tiltable manner. A frame portion (100a), and a rear frame portion (100b) that movably supports the seat back frame (200).
The shell (400) is fixedly arranged with respect to the rear frame part (100b),
The rear frame part (100b) is pivotally supported on the front frame part (100a) so that the rear frame part (100b) can be rotated from the initial setting position determined as normal. The seat device (10) according to [1], wherein the seat device (10) is limited to a range up to a forward tilting position that is determined on the assumption that the impact load is received through the door.

  [3] When the rear frame portion (100b) receives the impact load and rotates from the initial setting position to the front tilt position, the guide holes (101, 102) in the rear frame portion (100b) are provided. The seat back frame (200) having the fitting portion (210, 220) fitted into the fitting portion is also subjected to the impact load due to the fitting between the guide hole (101, 102) and the fitting portion (210, 220). The seat device (10) according to [1] or [2], wherein the seat device (10) is transmitted and tilted forward following the rotation of the rear frame portion (100b).

  [4] The guide frame (100) is a pair of two left and right, and is arranged in parallel with the main frame sandwiched from both sides [1], [2] or [3] The seat device (10) according to claim 1.

  [5] The plurality of guide holes (101, 102, 103) are configured to move the entire main frame forward when the backrest (20) is tilted backward and downward with the backrest (20) restricted. The seat device (10) according to [1], [2], [3], or [4], wherein the seat device (10) is formed in a shape that reduces a tilting amount of the rearward (20) to the rear.

  [6] The seat device (10) according to [1], [2], [3], [4], or [5], wherein the guide frame (100) also serves as a reinforcing member for the main frame. ).

The present invention operates as follows.
According to the seat device (10) described in [1], the shell (400) is fixedly disposed on the rear surface side of the seat, and a comfortable living space for passengers is partitioned by the shell (400). On the front side of the shell (400), the seat (30) is movably supported and the backrest (20) is tiltably supported so that the backrest (20) does not interfere with the shell (400). Tilt and movement of the seat (30) are linked. Here, on the rear surface of the shell (400), mounting parts such as a TV monitor, a cup holder, and a small tray for passengers sitting in the rear seat can be used.

  The seat is installed on the floor of the vehicle via a base frame (60) or the like. The backrest (20) has a seat back frame (200) as a skeleton, and a cushion member is mounted so as to cover the seat back frame (200). The seat part (30) has a bottom frame (300) as a skeleton, and a cushion member is mounted so as to cover the bottom frame (300). The seat back frame (200) and the bottom frame (300) are connected by a connecting means (310) to form an integral main frame.

  The main frame can be tilted from a normal reference position when the backrest (20) is most upright to a most tilted position when the backrest (20) is tilted most backward, and the base frame (60) and the like. It will be held on the floor via. When the backrest (20) is tilted backward for reclining, the amount of tilting of the backrest (20) is limited by a limiting means within a predetermined range that does not interfere with the shell (400). Further, the restricting means includes a seat back frame (200) and a bottom frame (300) so as to maintain a relative posture between the backrest (20) and the seat (30) when the backrest (20) tilts. The change of the angle is limited to a predetermined angle range.

  The connecting means (310) constitutes a restricting means together with a guide frame (100) described later, and the seat back frame (200) and the bottom frame (300) connected to the connecting means (310) serve as connecting parts. It is possible to rotate around the center and change their relative posture. A plurality of guide holes (101, 102, 103) are formed in the guide frame (100).

  The guide frame (100) is formed of, for example, a plate-like frame, and as described in [4], the guide frame (100) is arranged in parallel with the main frame sandwiched from both sides, forming a pair of two on the left and right. . Further, as described in [6], the guide frame (100) also serves as a reinforcing member for the main frame.

  The guide holes (101, 102, 103) change the angle between the seat back frame (200) and the bottom frame (300) connected, that is, the backrest surface (21) of the backrest (20) and the seat. The change of the angle formed by the seating surface (31) of the part (30) is limited. Thereby, the relative attitude | position of a seat back frame (200) and a bottom frame (300) is maintained. The guide holes (101, 102, 103) limit the tilting stroke of the backrest (20) and limit the amount of tilting when the backrest (20) tilts backward within a predetermined range. This amount of tilt is determined by the change in the angle between the seat back frame (200) and the bottom frame (300) and the tilt stroke.

  The main frame or the coupling means (310) is provided with fitting portions (210, 220, 320) that are respectively fitted into a plurality of guide holes (101, 102, 103) in the guide frame (100). When the backrest (20) tilts, these insertion portions (210, 220, 320) slide while being guided in the guide holes (101, 102, 103). Thereby, the amount of tilting of the backrest (20) to the back can be kept small.

  Further, since the relative posture between the backrest (20) and the seat (30) is maintained, the clothes of the seated person are not pulled by the backrest (20), and the clothes are not raised up. Further, maintaining the relative posture between the backrest (20) and the seat (30) means that no matter how the backrest (20) is tilted, the seated person's lumbar spine does not rotate. Become. For this reason, since the seating posture of the seated person with respect to the backrest (20) and the seat (30) does not change, a burden on the lumbar part due to the rotation of the lumbar part does not occur. Therefore, the seated person can sit in a comfortable posture, and accumulation of fatigue can be prevented even if the sitting time becomes long.

  The shape of the plurality of guide holes (101, 102, 103) is such that the displacement mode of the entire main frame is guided in an arc shape like the swing of a cradle. Further, as described in [5] above, the plurality of guide holes (101, 102, 103) move the entire main frame forward when tilting backward and downward where the backrest (20) is restricted. Therefore, it is preferable to form the backrest (20) in a shape that reduces the amount of tilting backward.

  As a result, when reclining, the seated person first presses the back against the backrest (20) to tilt the backrest (20), but a little force is required, but the inclination of the backrest (20) increases. Therefore, the backrest (20) can be tilted relatively easily even if it is a seated person with a weak force or a small seated person with a light weight.

  Further, according to the seat device (10), when an emergency impact is applied to the shell (400) from the rear, the shell (400) is provided by the buffer means provided in addition to the control means. By tilting forward, the impact load can be absorbed and the amount of tilting of the shell (400) can be limited within a predetermined range. As a result, the safety of passengers seated in the rear seats is further enhanced. For example, the head impact of FAA standards and HIC (Head Injury Criteria) can be used without using an expensive airbag seat belt. It is possible to satisfy the value criteria.

  For example, if the buffer means is configured as described in [2] above, the cost can be suppressed as much as possible. In other words, the buffer means divides the guide frame (100) into two parts, supports the bottom frame (300) so as to be movable, and supports the seat back frame (200) so that the seat back frame (200) can be tilted. And a rear frame part (100b) for movably supporting the seat back frame (200). Here, the shell (400) is fixedly arranged with respect to the rear frame part (100b).

  Then, the rear frame part (100b) is pivotally supported on the front frame part (100a), and the shell (400) is moved from the initial setting position where the rear frame part (100b) is normally rotated. The range is limited to the forward tilt position determined on the assumption that an impact load is received. Thus, since the rotation of the shell (400) during a break is limited to the range from the initial setting position to the forward tilt position, the safety of the occupant of the seat can be ensured. It should be noted that as a specific means for restricting rotation, it can be simply configured by an engagement relationship between an engagement pin provided in one of the two and an engaged groove provided in either one of the other.

  Furthermore, it is preferable to configure as described in [3] above. That is, when the rear frame part (100b) receives an impact load and rotates from the initial setting position to the forward tilting position, the rear frame part (100b) is fitted into the guide holes (101, 102) in the rear frame part (100b). The seat back frame (200) having the portions (210, 220) also receives the impact load due to the fitting between the guide holes (101, 102) and the fitting portions (210, 220), and the rear frame portion (100b). It is tilted forward following the rotation. If the seat back frame (200) is also rotated in this manner, the seat back frame (200) does not impair the forward rotation when the shell (400) breaks, and reliably absorbs the impact load. It becomes possible to do.

  According to the seat device of the present invention, when the backrest is tilted rearward for reclining, the amount of tilting of the backrest is limited, so that the backrest is less infringed on the living space of the rear seat. . Thereby, uncomfortable feelings, such as a feeling of pressure, are not given to the seated person of a backseat.

  In addition, since the change in the angle between the backrest and the seat is restricted, the backrest can be tilted while maintaining the relative posture between the backrest and the seat. As a result, even if the backrest is tilted, the comfortable posture of the seated person can be maintained at all times. Therefore, even if the seated person sits for a long time in the reclining state, the seated person does not get tired and is in a comfortable state. It is done.

  In addition, since the displacement between the backrest and the seat is an arc like the swing of a cradle, the weight is effectively used even for a seated person with weak power or a small and light weighted person. It is possible to recline.

  In addition, since the relative posture is almost maintained, when the user leans on the backrest while sitting, there is no shift of clothes due to a change in the relative posture between the backrest and the seat, and so on. It is possible to prevent the seated person from feeling uncomfortable.

  In addition, by providing shock absorbing means that can absorb impact loads with a simple configuration, even if the shell is fixedly arranged, special equipment such as an air bag type seat belt is not required, and the existing equipment is maintained while reducing costs. It is possible to meet safety standards.

It is a perspective view which shows the seat apparatus which concerns on embodiment of this invention. It is a side view which permeate | transmits and shows partially the internal mechanism of the seat apparatus which concerns on embodiment of this invention. It is a perspective view which shows the base frame which attached the guide frame among the seat apparatuses which concern on embodiment of this invention. It is a disassembled perspective view of the bottom frame shown with a connection board among the seat devices concerning an embodiment of the invention. It is a perspective view which shows a part of guide frame and a part of base frame among the seat apparatuses which concern on embodiment of this invention. It is explanatory drawing which expands and shows the principal part of a buffer means among the seat apparatuses which concern on embodiment of this invention. It is a perspective view which shows the state to which the impact load was added in the seat apparatus which concerns on embodiment of this invention. It is a side view which shows the state to which the impact load was added in the seat apparatus which concerns on embodiment of this invention. It is a disassembled perspective view which expands and shows the attachment part of a hydraulic cylinder among the seat apparatuses which concern on embodiment of this invention. It is explanatory drawing explaining the state which the seated person comfortably sits in the attitude | position which carried out the front bay naturally physiologically in the seat apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows the seating posture of the seated person before and behind reclining in the seat apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the change of the lumbar part vicinity of the seated person before and behind reclining in the seat apparatus which concerns on embodiment of this invention. It is explanatory drawing explaining the angle change of a backrest and each seat part in the seat apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows the seating posture of the seated person before and after reclining in the conventional seat apparatus. It is explanatory drawing explaining rotation of the seated person's lumbar part vicinity before and after reclining in the conventional seat apparatus.

Hereinafter, an embodiment representing the present invention will be described with reference to the drawings.
1 to 13 show an embodiment of the present invention.
The seat device 10 according to the present embodiment is configured for a vehicle such as an aircraft or a railway passenger vehicle, and the shell 400 is fixedly disposed on the rear surface side of the seat, and the seat portion 30 moves on the front surface side of the shell 400. The backrest 20 is supported so as to be tiltable, and the tilting of the backrest 20 and the movement of the seat portion 30 are linked within a range not interfering with the shell 400.

  FIG. 1 is a perspective view showing an entire seat apparatus 10 according to an embodiment of the present invention. FIG. 2 is a side view showing a part of the internal mechanism of the seat apparatus 10. 3 to 5 are perspective views showing a frame structure inside the seat apparatus 10. FIG. 6 is an explanatory view showing a main part of the buffer means provided in the seat device 10. Hereinafter, in each figure, an example in which the seat device 10 is applied to an aircraft two-seat seat device will be described.

  As shown in FIGS. 1 and 2, the seat device 10 has a backrest 20 for two persons, a seat portion 30, and a shell 400 held on a base frame 60 that forms the foundation thereof. Side armrests 40 are fixed to both side ends of the pair of seat portions 30. In each side armrest 40, an in-arm table (not shown) that can be pulled out and used is stored.

  Each side armrest 40 is provided with an operation lever 80 at a position on the tip side where a finger touches when the arm is placed. The operation lever 80 tilts the backrest 20 backward to recline, or returns the tilted backrest 20 toward the most upright original position (reference position). It is operated by pulling when adjusting. The operation of the hydraulic cylinder 110 described later is adjusted by the operation of the operation lever 80.

  A center armrest 50 is fixed between the seats 30. A small table 51 arranged in a pair on the left and right is provided at a position on the front end side of the upper surface portion of the center armrest 50. A partition 52 for partitioning the left and right spaces is provided at an upper surface portion of the center armrest 50 or a portion that rises rearward. Here, the part of the center armrest 50 that rises rearward is integrally fixed to the support column 401 that is the central portion of the shell 400. On the rear surface of the shell 400, although not shown, mounting parts such as a TV monitor, a cup holder, and a small tray for a passenger seated in the rear seat are mounted.

  As shown in FIG. 3, the base frame 60 includes a leg portion 62 that is fixed on a floor in a cabin of an aircraft, a reinforcing member 61 that is fixed by being stretched to the left and right at the lower portion of the leg portion 62, and legs. A shaft 63 and a shaft 64 which are arranged in parallel in the front-rear direction at the upper part of the part 62 and are fixed to the left and right are configured in a frame form. The shaft 63 is a metal hollow pipe and is disposed below the front end side of the seat portion 30. On the other hand, the shaft 64 is also a metal hollow pipe, but has a smaller diameter than the shaft 63 and is arranged to be slightly lower than the shaft 63 below the rear end side of the seat portion 30. (See FIG. 2).

  When the backrest 20 is tilted backward, the base frame 60 restricts the amount of tilting of the backrest 20 to a predetermined range that does not interfere with the shell 400, and the relative posture between the backrest 20 and the seat portion 30. Limiting means are provided for maintaining Such control means includes a connecting plate (connecting means) 310 (described later) that connects the seat back frame 200 constituting the backrest 20 and the bottom frame 300 constituting the seat portion 30 to form a main frame, and the base frame 60. It has a guide frame 100 fixedly attached to.

  Further, when an emergency impact is applied to the shell 400 from the rear side, the base frame 60 absorbs an impact load by tilting the shell 400 forward, and the tilt amount of the shell 400 is set to a predetermined amount. A buffer means is provided for limiting within the range. Such a buffer means mainly includes the guide frame 100 and the shell 400 in the same manner as the control means.

  Since two guide frames 100 are used per seat, in this embodiment which is a seating system for two persons, as shown in FIG. 3, four guide frames 100 corresponding to two seats are provided. The shafts 63 and 64 are fixed. All four guide frames 100 have the same shape and are arranged in parallel. The left and right guide frames 100 are respectively disposed in the side armrest 40, and the two center guide frames 100 are disposed at positions hidden by the center armrest 50.

  Each guide frame 100 is a metal plate-like frame whose rough shape is a crescent shape as a whole, but each guide frame 100 is divided into two parts, a front frame part 100a and a rear frame part 100b. The front frame portion 100 a is fixed so as to stand on the shaft 63 and the shaft 64. A front end portion of the front frame portion 100 a is fixed on the shaft 63, and an intermediate portion between the front end portion and the rear end portion is fixed to the shaft 64. From the intermediate part to the rear end part, it has a shape extending upward.

  The shell 400 is fixedly arranged with respect to the rear frame portion 100b. The lower end of the rear frame 100b is pivotally supported by the rear end of the front frame 100a. Here, the rotation of the rear frame portion 100b is tilted forward assuming that an impact load is received through the shell 400 from an initial setting position (corresponding to a reference position of the backrest 20) determined as normal. It is set to be limited to the range up to the position.

  That is, in FIG. 6, an arcuate engaged groove 105 centering on a pivot 104 serving as a center of rotation is formed in the lower end portion of the rear frame portion 100b. At the end, an engaging pin 106 is slidably fitted into the engaged groove 105 so as to be slidable.

  Here, in a state where the engaging pin 106 is in contact with one end side (the upper end in FIG. 6) of the engaged groove 105, the rear frame portion 100b is held at the initial setting position, while the impact load is applied. When added, the rear frame portion 100b rotates forward, and accordingly, the rear frame portion 100b rotates to the forward tilt position where the engagement pin 106 contacts the other end side (lower end in FIG. 6) of the engaged groove 105. It is set to be. Such a mechanism constitutes the basis of the buffer means. The engaged groove 105 may be formed in the front frame portion 100a while the engaging pin 106 may be provided in the rear frame portion 100b.

  As shown in FIG. 3, each guide frame 100 is formed with three guide holes 101, 102, and 103 that are elongated holes. Specifically, the front frame portion 100a is formed with a guide hole 103 extending from the tip portion toward the intermediate portion. The rear frame portion 100b is formed with a pair of upper and lower guide holes 101 and 102 extending in parallel to each other toward the middle portion at the lower end portion and the upper end portion thereof.

  The guide hole 103 guides the movement of the bottom frame 300 described below of the seat portion 30. The guide holes 101 and 102 are for guiding the movement of the seat back frame 200 described below of the backrest 20. The tilting stroke of the backrest 20 is limited by the positions and shapes of the guide holes 101, 102, and 103.

  Thereby, as will be described later, a change in the angle between the seat back frame 200 and the bottom frame 300 connected by the guide frame 100 and the connecting plate 310, that is, the backrest surface 21 of the backrest 20 and the seating surface of the seat portion 30. It is possible to maintain the relative posture between the seat back frame 200 and the bottom frame 300 by limiting the change in the angle formed by the angle 31 to a predetermined angle range.

  The predetermined angle range here is specifically 6.6 °, for example. If the angle between the seat back frame 200 and the bottom frame 300 at the reference position is 96.9 °, the predetermined angle range is at the most inclined position. The angle is 103.5 °. The change in the angle between the seat back frame 200 and the bottom frame 300 is related to the amount of tilting of the backrest 20 that tilts backward. The maintenance of the relative posture between the backrest 20 and the seat portion 30 does not intend that the angle does not change completely, but may be sufficient if the seated person cannot feel the change in the relative posture.

  Further, due to the limited tilting stroke, the displacement mode of the entire main frame when the main frame composed of the connected seat back frame 200 and the bottom frame 300 tilts becomes an arc shape like the swing of the cradle. Furthermore, the tilting amount of the upper part of the backrest 20 tilting backward can be limited within a predetermined range during reclining. This predetermined range is, for example, 13 cm as will be described later. Since the upper part of the backrest 20 is the largest and moves backward, the limit is determined with respect to the amount of tilting of the upper part.

  As shown in FIG. 5, the backrest 20 incorporates a metal seat back frame 200 as a skeleton, and a back portion and a backrest portion of the backrest 20 are provided so as to cover the seat back frame 200. It is installed. A cushion member is used for the back support portion, and the back support surface 21 as a surface thereof is formed in a shape that brings comfort to the seated person based on ergonomics. Moreover, the hardness of the cushion member and the like are also selected so as to provide comfort.

  A lower end 201 of the seat back frame 200 is pivotally supported via a pivot 202 at a rear end of a connecting plate (connecting means) 310 to be described later. Further, lower half portions of both side ends of the seat back frame 200 are connected to the rear frame portion 100b disposed on the left and right sides thereof. More specifically, a pair of upper and lower support pieces protruding rearward are provided on both side ends of the seat back frame 200, and these support pieces slide with respect to the guide holes 101 and 102 in the rear frame portion 100b. Bearings 210 and 220 serving as fitting portions to be fitted respectively are protruded toward the side.

  As shown in FIG. 4, the seat portion 30 incorporates a metal bottom frame 300 serving as a skeleton. The bottom frame 300 includes a mounting frame 301 on which a cushion member is mounted, and shafts 330, 340, 350, and 360 for mounting and mounting the mounting frame 301 with metal fittings. The seat surface 31, which is the surface of the cushion member, is formed in a shape that provides a comfortable sitting comfort for the seated person based on ergonomics. Further, the hardness of the cushion member and the like are selected so as to provide a comfortable sitting comfort.

  The shafts 330, 340, 350, and 360 are arranged in parallel, and both end portions thereof are fixed to connecting plates 310 disposed on both sides thereof. That is, the rearmost shaft 330 is installed at a position near the rear end of each connecting plate 310, and the second shaft 340 and the third shaft 350 from the rear are arranged in the middle portion of each connecting plate 310. The foremost shaft 360 is installed at the front end of each connecting plate 310, and is mounted so that the mounting frame 301 is covered on each of the connecting plates 310. The shaft 360 is connected and supported by the shaft 63 via a link member 370.

  Moreover, the center part of a pair of connection board 310 is connected with the said front frame part 100a (refer FIG. 3) arrange | positioned at the right and left. More specifically, a bearing 320 as a fitting portion that is slidably fitted into the guide hole 103 in the front frame portion 100a is provided in the center portion of the connecting plate 310 so as to project sideways. Further, lower end portions 201 of the seat back frames 200 arranged on the left and right sides of the pair of connecting plates 310 are pivotally supported via a pivot shaft 202.

  The bottom frame 300 is connected to the seat back frame 200 via a connecting plate 310 to form a main frame combined as a whole. Although not shown in FIGS. 1 and 7, as shown in FIGS. 2 and 8, a legrest 70 is disposed below the front end of the seat 30 in the present embodiment. A pair of arm members 71 for pivotably supporting the legrest 70 shown in FIG. 2 are pivotally supported at the front end portions of the pair of connecting plates 310, respectively. The legrest 70 is also configured to be driven by the hydraulic cylinder 110 described below together with the backrest 20 and the seat portion 30.

  The shaft 330 is connected to one end of a hydraulic cylinder 110. FIG. 9 is an enlarged perspective view showing the attachment portion of the hydraulic cylinder 110 in FIG. 3 in an enlarged manner. A bearing 140 for supporting the rod 117 of the hydraulic cylinder 110 is attached to the shaft 63 of the base frame 60. The bearing 140 is supported by a bearing frame 144 fixed to the shaft 63. The bearing 140 can rotate around its own axis while being supported by the bearing frame 144. A bearing hole 141 passes through the bearing 140 in a direction perpendicular to the axis.

  The tip portion 118 of the rod 117 is a threaded portion, and a stopper 119 is provided in the middle of the threaded portion. The rod 117 is inserted into the bearing hole 141 at a portion ahead of the stopper 119 and is fixed to the bearing 140 via a nut 142 and a washer 143. The rod 117 is connected to the operation cable 120 via the bearing 140.

  The operation cable 120 is for adjusting the operation of the hydraulic cylinder 110, passes through the shaft 63, reaches the inside of the side armrest 40, and is connected to the operation lever 80. By operating the operation lever 80, the operation of the hydraulic cylinder 110 can be locked and the locked state of the operation can be released.

  The other end 111 of the hydraulic cylinder 110 is connected to the shaft 330 of the bottom frame 300. A connecting fitting 150 is fixed to the shaft 330. The connecting fitting 150 has a plate-like connecting portion 151 having a through hole formed at the tip. A gap 112 for sandwiching the connecting portion 151 is formed at the end 111 of the hydraulic cylinder 110, and is fixed by a bolt 115 and a nut 116 with the connecting portion 151 sandwiched between the gap 112.

  The main frame can be tilted from the reference position where the backrest 20 stands most to the most tilted position where the backrest 20 tilts most. When the main frame is not at the reference position, the hydraulic cylinder 110 operates to restore the main frame to the reference position. When the main frame is in the reference position, the hydraulic cylinder 110 is unlocked by operating the operation lever 80 and then the backrest 20 is pushed against the force in the restoring direction from the hydraulic cylinder 110, that is, the back By applying a force in the direction in which the tilt 20 is tilted, the backrest 20 can be tilted to an arbitrary position up to the most tilted position.

  The hydraulic cylinder 110 can be locked at any position from the reference position to the most tilted position regardless of the position of the main frame. When the hydraulic cylinder 110 is locked, not only restoration by the hydraulic cylinder 110 but also tilting of the seat back frame 200 due to external force is locked, so that the state of the backrest 20 and the seat portion 30 is fixed.

  The restoration and locking of the hydraulic cylinder 110 is, for example, from the Asian female body percentile value 5 when shown in the Japanese body percentile published in ADULTDATA (Government Consumer Safety Research) ADULTDATA (The Handbook of Adult Anthropometric and Strength Measurements). It has a performance that functions particularly effectively for a wide range of seats up to a 95th body percentile of Western men. Thereby, it is possible to deal with almost all seated persons regardless of the weight.

Next, the operation of the seat device 10 according to the present embodiment will be described.
The seat apparatus 10 is arranged in a passenger cabin of an aircraft at a seat interval according to its purpose. The seat device 10 is applied to a seat called a premium economy that is one rank higher than a general economy class, and is usually mounted and arranged at a pitch of about 34 inches (864 mm) to 39 inches (990 mm). Depending on the arrangement zone, a seat, which will be described later, such as the seat device 10 but requires a small inclination, can have a larger space than that of a conventional seat or an increased number of seats. In particular, since the shell 400 is fixedly disposed on the rear surface side of the seat, a comfortable living space for passengers is defined by the shell 400.

  On the front side of the shell 400, the seat portion 30 is movably supported and the backrest 20 is supported to be tiltable, and the tilting of the backrest 20 and the movement of the seat portion 30 are interlocked as long as they do not interfere with the shell 400. To do. Here, on the rear surface of the shell 400, mounting parts such as a TV monitor, a cup holder, and a small tray for passengers seated in the rear seat can be used. Here, the movement of the backrest 20 and the seat portion 30 is limited to a range that does not interfere with not only the shell 400 itself but also the attached mounting components. Note that various designs can be adopted for the shell 400.

  FIG. 10 is an explanatory view illustrating a state where the seated person is comfortably seated in a posture that is naturally physiologically pre-bay. FIG. 11 is a schematic diagram showing the sitting posture of the seated person before and after the reclining in the present embodiment. FIG. 12 is an explanatory diagram illustrating changes in the vicinity of the lumbar portion of the seated person before and after reclining in the present embodiment. FIG. 14 is a schematic diagram showing a seated posture of a seated person before and after reclining in a conventional seat device. FIG. 15 is an explanatory view for explaining the rotation around the lumbar portion of the seated person before and after the reclining in the conventional seat device.

  The seat device 10 shown in FIG. 10 shows a case where the backrest 20 is in the reference position. The seat device 10 in this state supports the seat occupant's pelvis 500 from two directions to give comfort to the seat occupant. Here, the support from one direction is the support in the direction of arrow A by the lower part of the backrest 20. This supports the iliac bone 501 of the seated person and the vicinity of the third and fourth lumbar vertebrae. The support from the other direction is a support in the direction of arrow B by the rear end portion of the seat portion 30. This supports the sacrum 502 of the seated person.

  Such support includes the shape of the backrest surface 21 of the backrest 20 and the shape of the seat surface 31 of the seat 30 formed based on ergonomic analysis, and the relative posture of the backrest 20 and the seat 30. Is derived from. This allows the seated person to sit in a comfortable posture that naturally naturally wakes up, and is less likely to cause fatigue even if seated for a long time.

  FIG. 14 shows two conventional seat apparatuses 10A arranged at the front and rear, and passengers are seated on the front seat apparatus 10A with the backrest 20A raised to the reference position. This state is the same as the state described with reference to FIG. 10 and is a state in which the seated person is seated in a posture that can provide comfort. Passengers are seated in the reclining state in which the backrest 20A is tilted on the rear seat apparatus 10A. In this state, the angle formed by the direction in which the thigh extends and the direction in which the upper body is raised is clearly different from the angle of the seated person sitting on the front seat apparatus 10A.

  Further, when the tilting amount of the backrest 20A to the rear is seen with reference to the position where the leg portion 62A of the base frame is fixed on the floor, the upper portion of the backrest 20A has moved greatly rearward in the reclining state. I understand that. The amount of tilt is generally 15 cm (about 6 inches) to 28 cm (about 11 inches). Thereby, the living space of the seated person sitting on the seat apparatus immediately after the seat apparatus 10A in the reclining state is greatly infringed.

  The difference in the sitting posture of the seated person is shown in FIG. Even if the seating posture of the seated person changes, the position of the seated person's pelvis 500 does not change, but the lumbar vertebra 510 connected to the pelvis 500 moves so as to rotate around the connection part with the pelvis 500. I understand that. As a result, the reclining seater's posture is no longer a natural and physiologically comfortable posture before reclining, but a posture in which a load is applied near the lumbar spine 510. Will accumulate.

  Such a change in the sitting posture is due to the fact that the relative posture between the backrest 20A and the seat portion 30A changes greatly from the relative posture at the reference position that provides comfort. Specifically, the angle formed by the backrest surface of the backrest 20A and the seating surface of the seat portion 30A is greatly opened from the angle at the reference position.

  On the other hand, FIG. 11 shows a state in which two seat devices 10 according to the present embodiment are arranged at the front and rear, and passengers in the state where the backrest 20 is raised to the reference position in the front seat device 10. Sitting. This state is the same as the state described with reference to FIG. 10 and is a state in which the seated person is seated in a posture that can provide comfort. Passengers are seated in the reclining state in which the backrest 20 is tilted on the rear seat device 10.

  Looking at this state, it can be seen that unlike the case of the seat apparatus 10A in FIG. 14, the angle formed by the direction in which the thigh extends and the direction in which the upper body is raised does not change so much. This is because even if the main frame is tilted from the reference position to the most tilted position, the relative posture between the seat back frame 200 and the bottom frame 300 does not change greatly, so the relative posture between the backrest 20 and the seat portion 30 is comfortable. This is because there is almost no change from the relative posture at the reference position.

  Further, when the tilting amount of the backrest 20 with respect to the position where the leg portion 62 of the base frame 60 is fixed on the floor is seen as a reference, the reclining state in the reclining state as compared with the seat device 10A of FIG. It can be seen that the amount of tilting is small. In the present embodiment, the amount of tilting is limited to a value smaller than the typical 15 cm, for example, 13 cm (about 5 inches), and the occupied space occupied by the seat device 10 for one seat and the living space is reduced. Even if it is made to do, it can provide a favorable comfort without affecting comfort.

  Further, the degree of the backrest 20 of the seat device 10 in the reclining state entering the rear living space can be clearly reduced. Thereby, when the front seat is in the reclining state, it is possible to reduce discomfort such as a feeling of pressure felt by the seated person in the rear seat. This effect makes it possible to make the seat mounting pitch narrower than that of the conventional seat, increase the number of seats in a limited cabin space, and improve the profitability.

  The difference in seating posture of the seated person in the seat device 10 is shown in FIG. Since the tilting process of the seat back frame 200 is limited by the guide hole 101 and the guide hole 102 in the rear frame part 100b of the guide frame 100, when the backrest 20 is tilted from the reference position, the backrest 20 moves backward. It can be seen that the amount of tilting of the upper part of is limited to a small amount.

  Referring also to FIG. 11, it can be seen that the restriction by the guide hole 101 and the guide hole 102 restricts the movement of the main frame in an arc shape like the swing of the cradle. That is, when the backrest 20 is tilted rearward, the backrest 20 moves downward so that the overall cradle swings while maintaining the same posture as when the backrest 20 is standing upright. At the same time, the seat 30 moves forward.

  Such displacement in the seat device 10 slides in the three guide holes 101, 102, 103 formed in the guide frame 100 and their positional relationship, the angle, curvature, and curvature of each of the guide holes 101, 102, 103. This is realized by the relationship between the bearings 210, 220, and 320 and their delicate clearances, and the force of the hydraulic cylinder 110 that is adopted as the driving means that has been sufficiently studied and calculated.

  Therefore, even if the backrest 20 is tilted and reclined, the position of the pelvis 500 is slightly raised and the seated person is slightly upward, and the rotation at the lumbar portion as seen in the prior art does not occur. . As a result, since the posture of the seated person is always maintained substantially the same as the comfortable seating posture at the reference position, the feeling of comfort is maintained as it is. Therefore, even if sitting in the reclining state takes a long time, the burden on the seated person is small, so that the fatigue accumulated in the seated person is small.

  Further, when reclining, the seated person first operates the operation lever 80 on the side armrest 40 to release the lock of the hydraulic cylinder 110 and first presses the back against the backrest 20 to tilt the backrest 20. At this time, as the tilt of the backrest 20 increases, the weight of the seated person is naturally applied to the backrest 20, so that the backrest 20 can be moved by simply tilting the body backward without applying excessive force. By tilting naturally, sliding downward, and the seat 30 sliding forward and upward and reaching the final stable posture, it can be freely stopped at a desired position by operating the operating lever 80.

  Thereby, even a seated person with weak power and a seated person who is small and light in weight can recline relatively easily. In addition to the movement in which the relative posture between the seat back frame 200 and the bottom frame 300 is maintained, the legrest 70 is also operated by operating another operation lever 80 on the side armrest 40 so as to suit the passenger's preference. , Can be adjusted to the desired position freely up and down.

  Furthermore, the fact that the seating posture of the seated person is maintained by maintaining the relative posture between the seat back frame 200 and the bottom frame 300 means that there is almost no deviation between the backrest 20 and the back of the seated person. Thus, when the backrest 20 is tilted, the clothes of the seated person do not rise up.

  FIG. 13 is an explanatory diagram for explaining angle changes of the backrest 20 and the seat portion 30 of the seat device 10 according to the present embodiment. When a person is seated on the seat device 10, the degree of comfort and the accumulated degree of fatigue when sitting for a long time vary depending on the sitting posture. The posture in which a person can feel comfort when seated on the seat device 10 is a posture in which the upper body is naturally physiologically front bay. The seating posture is affected by the backrest 20 of the seat device 10 and the shape and hardness of the seat portion 30, but the most affected are the backrest surface 21 of the backrest 20 and the seat surface 31 of the seat portion 30. It is an angle to be formed.

The recommended values for comfort posture have been confirmed for these angles (Diffrient, n., AR Tilley and JC Bardagjy, 1978: Humanscalee 1/2/3. The MIT Press, Cambridge). According to this, the back surface angle from the vertical and the seat surface angle from the horizontal are respectively
Back surface angle> 28 °
Seat angle> 15 °
It is.

In the present embodiment, the back surface angle and the seat surface angle are respectively
Back surface angle <31 °
Seat angle <19 °
It can be displaced within the range of. The change in the relative posture between the backrest 20 and the seat portion 30, that is, the change in the angle between the seat back frame 200 and the bottom frame 300 is limited to the predetermined angle range, and the backrest surface angle and the seat By determining the position and shape of the guide holes 101, 102, 103 so that the face angle satisfies the recommended value, the seated person can sit comfortably for a long time regardless of the reclining state. it can.

  Furthermore, according to the seat device 10, when an emergency impact is applied to the shell 400 from the rear, the shell 400 is tilted forward by the buffer means provided in addition to the control means. Thus, the impact load can be absorbed and the tilting amount of the shell 400 can be limited within a predetermined range. As a result, the safety of passengers seated in the rear seats is further enhanced. For example, the head impact of FAA standards and HIC (Head Injury Criteria) can be used without using an expensive airbag seat belt. It is possible to satisfy the value criteria.

  As shown in FIG. 6 described above, the buffer means includes an arcuate engaged groove 105 formed in the lower end portion of the rear frame portion 100b forming the guide frame 100, and a rear end portion of the front frame portion 100a. The engaging pin 106 that projects from the engaging groove 105 so as to be slidable relative to the engaged groove 105 is formed as a main part, and the structure is relatively simple, so that the cost can be suppressed as much as possible. Accordingly, the head impact value standard of FAA standard / HIC (Head Injury Criteria) can be satisfied without using an expensive airbag-type seat belt or the like.

  Specifically, the rear frame portion 100b is pivotally supported at the lower end portion thereof at the rear end portion of the front frame portion 100a via the pivot 104, and the rotation of the rear frame portion 100b here is related to the above-mentioned relationship. A forward tilt determined on the assumption that the coupling pin 106 is relatively slidable in the engaged groove 105, that is, when an impact load is received through the shell 400 from an initial setting position determined as normal. Limited to range up to position.

  When an emergency impact is applied to the shell 400 from the rear, the impact load is transmitted as it is to the rear frame portion 100b via the shell 400. Then, as shown in FIGS. 8 and 7, the rear frame part 100b tilts forward together with the shell 400, and the impact load is absorbed along with the tilting. As described above, the rotation of the shell 400 at the time of break is limited to the range from the initial setting position to the forward tilting position described above, so that the safety of the occupant of the seat can be ensured. In addition, the support | pillar part 401 which is the center part of the shell 400 does not tilt.

  In addition, when the rear frame portion 100b receives an impact load and rotates from the initial setting position to the forward tilt position, the seat back includes the bearings 210 and 220 fitted in the guide holes 101 and 102 in the rear frame portion 100b. The frame 200 is also tilted forward following the rotation of the rear frame part 100b when the impact load is transmitted by the fitting of the guide holes 101, 102 and the bearings 210, 220. By rotating the seat back frame 200 in this way, the seat back frame 200 can absorb the impact load reliably without fear of impairing the forward rotation of the shell 400 during a break. .

  As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention can be modified or added without departing from the scope of the present invention. Included in the invention. For example, although the present embodiment is configured for two-seater, it may be for one-seater or three-seater. Further, the seat is not limited to an aircraft seat.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a seat device in which the tilt of the backrest and the movement of the seat portion are interlocked and absorbs shock even in a seat having a fixed shell at the rear portion, particularly a vehicle seat device such as an aircraft and a vehicle. it can. In particular, the number of seats in a limited space such as an aircraft or a vehicle can be increased, which leads to an improvement in profitability.

DESCRIPTION OF SYMBOLS 10 ... Seat apparatus 10A ... Seat apparatus 20 ... Backrest 20A ... Backrest 21 ... Backrest surface 30 ... Seat part 31 ... Seat surface 40 ... Side armrest 50 ... Center armrest 60 ... Base frame 70 ... Legrest 71 ... Arm member 80 ... Operation lever 100 ... Guide frame 100a ... Front frame part 100b ... Rear frame part 101 ... Guide hole 102 ... Guide hole 103 ... Guide hole 104 ... Axis 105 ... Engaged groove 106 ... Engagement pin 110 ... Hydraulic cylinder 120 ... Operation Cable 200 ... Seat back frame 201 ... Lower end 202 ... Axis 210 ... Bearing 220 ... Bearing 300 ... Bottom frame 301 ... Mounting frame 310 ... Connecting plate 320 ... Bearing 330 ... Shaft 340 ... Shaft 350 ... Shaft 360 ... Shaft 370 ... Link member 400 ... Shell 500 ... Pelvis 501 ... Ilium 502 ... Sacrum 510 ... Lumbar spine

Claims (6)

A shell is fixedly arranged on the rear surface side of the seat, the seat is supported movably on the front side of the shell and the backrest is tiltably supported, and the backrest is tilted within a range not interfering with the shell. In the seat device in which the movement of the seat portion is interlocked,
Limiting means for limiting the amount of tilting of the backrest within a predetermined range that does not interfere with the shell and maintaining the relative posture between the backrest and the seat when the backrest is tilted backward. ,
When an emergency impact is applied to the shell from behind, the shock absorber absorbs an impact load by tilting the shell forward, and limits the tilt amount of the shell within a predetermined range; With
The restricting means includes a connecting means for connecting a seat back frame constituting the backrest and a bottom frame constituting the seat portion to form a main frame, and an angle formed by the seat back frame and the bottom frame. It has a guide frame formed with a plurality of guide holes for limiting the amount of tilting within a predetermined range by limiting the change and maintaining the relative posture and limiting the tilting stroke of the backrest,
The main frame or the coupling means is provided with a plurality of insertion portions that are respectively inserted into the plurality of guide holes of the guide frame and are slidable in the plurality of guide holes,
The seating device according to claim 1, wherein the plurality of guide holes are formed in a shape that guides a displacement mode of the entire main frame in an arc shape like a swing of a cradle. The buffer means divides the guide frame into two parts, supports the bottom frame so as to be movable, and allows the front frame part to pivotally support the seat back frame and move the seat back frame. Having a rear frame part to support,
The shell is fixedly arranged with respect to the rear frame portion,
The rear frame portion is pivotally supported on the front frame portion, and the rear frame portion is assumed to rotate when the impact load is received through the shell from an initial setting position determined as normal time. The seat device according to claim 1, wherein the seat device is limited to a range up to a predetermined forward tilt position.   When the rear frame portion receives the impact load and rotates from the initial setting position to the forward tilt position, the seat back frame having the fitting portion fitted into the guide hole in the rear frame portion The seat according to claim 1, wherein the impact load is transmitted by the fitting between the guide hole and the fitting portion, and the seat is tilted forward following the rotation of the rear frame portion. apparatus.   4. The seat device according to claim 1, wherein the guide frames are arranged in parallel with a pair of left and right guide frames sandwiching the main frame from both sides. 5.   The plurality of guide holes are formed in a shape that reduces the amount of backward tilting of the backrest by moving the entire main frame forward when tilting backward and downward where the backrest is limited. The seat device according to claim 1, 2, 3 or 4, wherein the seat device is provided.   6. The seat device according to claim 1, wherein the guide frame also serves as a reinforcing member for the main frame.

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