JP2006000143A - Chair with table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a person to sit in a comfortable and easeful posture by preventing easy interference between a support arm of a table and a backrest and enlarging a rearward tilt angle of the backrest. <P>SOLUTION: The top plate support arm 39 in the table 5 is formed into an approximate L shape in a side view passing through the lower part of the backrest 4 and extending forward, the front end part of a front-facing piece 39b is turnably pivoted to an approximate center in the front/rear direction of a base frame 8 supporting a seat body 3 by a pivot 22 facing in the left/right direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chair with a table in which a table is provided on the back of a backrest of a chair such as a railway vehicle or an aircraft.

In a chair installed in a guest room such as a railway vehicle or an aircraft, on the back of the backrest, a table for use by a back seat occupant is stored in the back of the backrest, Some are mounted so as to be rotatable in a horizontal position of use (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 11-225842 (FIGS. 2 and 6) Japanese Patent Laid-Open No. 11-59249

  In each of the conventional chairs with a table described in the above-mentioned patent documents, the support arm of the table has a substantially straight shape, and the lower ends thereof are both sides of the lower end portion of the backrest (backrest or seat back). Since the unit is pivotally supported coaxially with the pivot axis of the backrest or via a link mechanism, there is the following problem.

When the support arm is rotated backward and the backrest is tilted backward with the table in the operating position, the lower back of the backrest and the lower end of the support arm come close to each other at an early stage, so they interfere. In order to avoid this, it is necessary to limit the back tilt angle of the backrest.
Therefore, there is a problem that the user cannot sit in a more comfortable comfortable posture.

  In order to deal with this problem, it may be possible to form a slightly deep relief groove in the shape of a vertically long slit that can be fitted with the lower end of the support arm on the lower back of the backrest. When the backrest is raised, the escape groove is exposed and looks bad.

  Also, if the lower end of the support arm is pivotally supported by the lower end of the backrest, the support arm will inevitably be placed in the back of the backrest when the table is placed in a non-use position in the recess on the back of the backrest. Alternatively, it comes into contact with or close to the inner surface of the recess.

Therefore, if the table is inadvertently rotated to a non-use position, there is a risk that a finger or the like may be pinched between the support arm and the backrest.
The present invention has been made in view of the above problems, and by making the support arm of the table less likely to interfere with the backrest, the backward inclination angle of the backrest is increased so that the user can sit in a more comfortable and comfortable posture. It is another object of the present invention to provide a chair with a table that can prevent a finger or the like from being caught between the table support arm and the backrest.

According to the present invention, the above problem is solved as follows.
(1) On the back of a backrest that can be tilted rearwardly on the back of the seat, it is composed of a support arm that can be rotated rearward around the lower end, and a movable top plate that is pivotally attached to the upper end so as to be able to rotate up and down. The table is provided so as to be rotatable between a non-use position where the table is stored along the back of the backrest and a use position where the movable arm can be made substantially horizontal by turning the support arm backward. In the chair with a table, the support arm has a substantially L-shape in a side view in which a forward piece at a lower end extends forward through the lower part of the backrest, and a front end portion of the forward piece is a seat body. It pivotally attaches to a substantially central portion in the front-rear direction of the supporting base frame so as to be pivotable with a pivot shaft facing in the left-right direction.

(2) In the above item (1), when the table is rotated to the non-use position, a gap is formed between the support arm and the back of the backrest.

(3) In the above item (1) or (2), a recess capable of accommodating the movable table top of the table is provided on the back of the backrest.

(4) In any of the above items (1) to (3), the backrest is attached to the L-shaped back frame when viewed from the side, and the front end of the forward piece at the lower end of the back frame is attached to the support arm. It is pivotally attached to the base frame by a common pivot axis.

According to the first aspect of the present invention, when the table is rotated backward so as to be in the use position, the support arm is rotated rearward and downward about the substantially central portion in the front-rear direction of the base frame that supports the seat body. However, it is relatively far away from the lower end and back of the backrest. As a result, when the backrest is tilted backward, the lower part of the back surface is less likely to interfere with the support arm, and the backrest can be tilted to that extent, so that it is possible to sit in a more comfortable and comfortable posture.
In addition, it is not necessary to form a long escape groove into which the support arm enters in the lower part of the back of the backrest, which improves the appearance.

  According to the second aspect of the present invention, even if the table is inadvertently rotated to the non-use position, there is no fear that a finger or the like is caught between the support arm and the back of the backrest, and it is safe.

  According to the invention described in claim 3, since the movable top plate does not protrude beyond the back of the backrest, the space between the front seat and the rear seat is increased, and the appearance of the chair is improved.

According to the invention described in claim 4, since the backrest and the table can be rotated independently, even if the seated person in the front seat unexpectedly tilts the backrest, the seated person in the back seat uses it. There is no fear of tilting the table.
Further, since the center of rotation of the backrest and the support arm is the same, the table can be stored in a fixed position on the back surface of the backrest regardless of the tilting position of the backrest.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair with a table according to the present invention installed in, for example, a passenger room of a railway vehicle. The two rows are arranged side by side.

  The left and right chairs (1) comprise a seat (3), a backrest (4), a table (5), and an armrest (6) on the outer side, all of which are exploded perspective views of FIG. As shown in the figure (only the right chair of FIG. 1 is shown), it is attached to the frame (7).

  The frame (7) includes a base frame (8), a seat frame (9), and a L-shaped back frame (10) that is forwardly viewed from the side, and is attached to the top of the gantry (2).

  The base frame (8) is formed in a square frame shape in plan view by fixing the horizontal rods (12) and (12) to the front and rear facing surfaces of the pair of left and right side plates (11) and (11).

  The seat frame (9) has a base frame (8) by fixing three seat receiving rods (14) to the front and rear and center faces of the pair of left and right seat support plates (13) (13). It is formed in a substantially rectangular frame shape that can be accommodated between the side plates (11) with a margin.

  The rear half of the seat support plate (13) is slightly raised so as to form an inverted L shape when viewed from the side, and a horizontal support piece (13a) facing outward is continuously provided at the upper end thereof.

  The front end of the seat frame (9) has a left and right pivot (15) fixed to the front end of both seat support plates (13), drilled in the upper part of the front end of both side plates (11) of the base frame (8). By being inserted into the elongated hole (16) facing obliquely rearward and upward, it is pivotally supported in the base frame (8) so as to be able to turn up and down and to move obliquely up and down along the elongated hole (16). Yes.

  As shown in the cross-sectional view of FIG. 3, the front half of the seat frame (9) and the upper part of the front half of the base frame (8) can be accommodated in the center of the lower surface of the front half of the seat (3). A concave portion (17) is formed, and a concave portion (18) having a large vertical dimension that can accommodate a standing portion of the rear half portion of the seat frame (9) is connected to the concave portion (17). Are formed in two stages.

  The left and right side surfaces and the rear surface of the substantially rear half of the seat body (3) are notched so as to communicate with the recess (18) (see FIG. 2).

  The lower surface of the seat shell (19) mounted in the recess (17) is fixed in contact with the three seat receivers (14) of the seat frame (9) and the upper surfaces of the left and right support pieces (13a). Is fixed to the lower surface of the recess (18), whereby the seat (3) is attached to the seat frame (9).

  The back frame (10) is a left and right vertical L-shape joined to the inner surface of the lower part of the left and right vertical rods (10a) (10a) by a connecting rod (20) with the upper end facing the left and right direction. A pair of support arms (21) and (21) are configured to be fixed with rising pieces (21a).

As shown in FIG. 4, the front ends of the forward pieces (21b) of both support arms (21) are pivoted in the left-right direction at the center in the front-rear direction of the side plates (11) of the base frame (8). It is pivotally mounted by 22).
Further, an intermediate portion of the forward pieces (21b) of both the support arms (21) is a seat support plate (between the side plate (11) of the base frame (8) and the seat support plate (13) of the seat frame (9)). 13) It is pivotally attached to the rear end of the pivot (23) facing the left-right direction, which is higher than the pivot (22).

  As a result, when the support arm (21) is rotated downward about the pivot (22) and the entire back frame (10) is tilted backward, the seat frame (9) is also linked to the pivot (15 ) As the center, and the pivot (15) moves rearward and upward along the long hole (16), thereby raising the front end.

  The backrest (4) is fixed to the back frame (10) in a state where the upright portion of the back frame (10) is accommodated in a recess (24) formed at the center of the back surface thereof, and the back frame (10 ) Is covered with appearance by a closing pad (25) and a back plate (26) fixed to the opening on the rear surface of the recess (24).

  A gas spring (27) that forms part of the reclining mechanism is next to the side between the connecting rod (20) of the support arm (21) and the horizontal rod (12) at the rear of the base frame (11). It is installed like this.

  As shown in FIG. 5, a downward U-shaped bracket (28) is fixed to the lower surface of the outer side of the connecting rod (20), and the upper end of the cylinder of the gas spring (27) is fixed to the bracket (28). Is pivotally attached.

  A bracket (29) that is U-shaped when viewed from the front is fixed to the upper surface of the outer surface (12) so as to face the bracket (28). Further, a U-shaped connecting metal fitting (30) attached to the lower end of the rod (27a) of the gas spring (27) is pivotally attached by a pin (31) facing in the left-right direction.

  A pressing lever (32) for pushing the push valve (27b) of the gas spring (27) rotates up and down around the pivot (33) at the rear end in the U-shaped space of the coupling bracket (30). It is loosely inserted so that it can move.

  Connected to the front end of the pressing lever (32) is a wire (35a) of an operation cable (35) having one end fixed to a support piece (34) integral with the coupling fitting (30). The other end of the operation cable (35) is linked to an operation button (36) projecting on the inner surface of the front upper end of the armrest (6). By pressing this button (36), the wire (35a) is pulled. Then, the pressing lever (32) rotates upward, the push valve (27b) is pressed, and the lock of the gas spring (27) is released.

  As shown in FIG. 4, the armrest (6) is screwed to the side surface of the outer side plate (11) of the base frame (8) through a notch portion on one side surface of the rear half of the seat body (3). .

  The table (5) described above is composed of a movable top plate (37) and a pair of left and right top plate support arms (39) and (39) whose upper end portions are connected by a horizontal rod (38). Rotate up and down by pivoting the left and right pivots (40) projecting on the left and right sides of the lower end of 37) to the upper ends of the upright pieces (39a) of the top support arms (39) It is installed freely.

  In addition, a pair of left and right stopper pins (41) projecting directly under the pivot (40) is formed at the upper end of the upright piece (39a) of both top plate support arms (39). The movable top plate (37) is parallel to the back plate (26) and is not in the up-and-down direction, and the top plate support arm (39 ) Is attached so as to be able to turn up and down between the horizontal use position (see FIGS. 2 and 3).

  As shown in FIGS. 2 to 4, the front end portion of the front piece (39b) at the lower end of the left and right top plate support arms (39) is located on the outer surface of the both side plates (11) of the base frame (8). A pivot (22) common to the support arm (21) of the backrest (4) is pivotally attached to the base frame (8) so as to be rotatable up and down.

The upper surface of the front end of both forward facing pieces (39b) is the lower end of an adjustment stopper (44) attached to an L-shaped attachment piece (43) fixed to the side surface of the middle part of both side plates (11) of the base frame (8). (See FIG. 2).
That is, when the left and right top plate support arms (39) are rotated rearward and the front ends of the left and right front pieces (39b) are in contact with the adjustment stopper (44), the movable top plate (37) is almost It is designed to be a horizontal use position.

  As shown in FIG. 3, the support shaft (45) passing through the center of the upper end portion of the back plate (26) and facing the front end with the front end portion fixed in the horizontal frame of the back frame (10) is engaged. A stop lever (46) is pivotally attached, and the locking lever (46) is locked to the thin wall portion (37a) on the back of the upper end of the movable top plate (37), so that the table (5), The movable top plate (37) and the top plate support arm (39) are held in a non-use position.

  At this time, a slight gap (S) is formed between the left and right top plate support arms (39) and the backs of the backrest (4) and the backplate (26) to prevent fingers and the like from being caught. Yes. The movable top plate (37) has its front half in the thickness direction accommodated in a recess (47) formed on the back surface of the backrest (4) (see FIG. 3).

  In the chair (1) of the above embodiment, the operation button (36) of the armrest (6) is pushed and the push valve (27b) of the gas spring (27) is pushed in order to tilt the backrest (4) backward. As shown in FIG. 6, the support arm (21) of the back frame (10) rotates downward about the pivot (22) while compressing the gas spring (27), as shown in FIG. The backrest (4) can be tilted backwards.

  When the backrest (4) is tilted backward, the rear end is connected to the support arm (21) with a pivot (23), and the front end is pivoted to the slot (16) of the base frame (8) with a pivot (15). The supported seat frame (9) tilts rearward and downward within the range of the long hole (16). As a result, the seat body (3) attached to the seat frame (9) also tilts rearwardly and downwardly while the front part moves slightly rearward and upward.

  As a result, the seat occupant's buttocks do not move forward as in the prior art, and the seat occupant's load applied to the front side of the seat (3) is reduced, so that the buttocks are stably supported. This makes it possible to sit in an easy posture.

Further, since the seat body (3) tilts rearward and downward, the lower leg part is tilted rearward with the hip part as the center, and the bending angle between the lower leg part and the thigh part, that is, the knee bending angle is increased. Sitting comfort is obtained.
Furthermore, since the knee does not move forward, the space between the front seat is not narrowed, and the passage of the seated person in the adjacent seat is not hindered.

  The lower surface of the seat (3) is provided with two-level recesses (17) and (18), and the upper half of the base frame (8), the seat frame (9), and the forward pieces of the support arm (21) (21b) is accommodated, the gas spring (27) is accommodated in the backrest (4), and the conventional complicated link mechanism is omitted, so that the entire chair including the seat (3) The height can be reduced, and it becomes easy to carry into a guest room such as a railway vehicle or an aircraft with a limited height and to perform construction work.

  The table (5) has a top support arm (39) that is substantially L-shaped forward, and the front end of the front piece (39b) is the support arm (21) that is the pivot center axis of the backrest (4). Since the pivot (22) is pivotally attached to the center of the base frame (8) in the front-rear direction, when the table (5) is rotated to the use position, as shown in FIG. The arm (39) is spaced relatively far from the lower end and back of the backrest (4).

  As a result, as shown in FIG. 6, when the backrest (4) is tilted backward, the lower part of the back surface is less likely to interfere with the lower end of the top plate support arm (39). 4) The rearward tilt angle can be increased, and the user can sit in a more comfortable and comfortable posture.

  The pivot axis of the backrest (4) and the table (5) is coaxial, and the table support arm (39) is located outside the support arm (21) of the backrest (4). Therefore, even if the seat occupant of the front chair tilts the backrest, the table (5) used by the seat occupant of the rear chair does not tilt.

  Further, when the table (5) is rotated to the non-use position, a gap (S) is formed between the top plate support arm (39) and the back surface of the backrest (4). A finger or the like is prevented from being pinched.

The present invention is not limited to the above embodiment.
In the above-described embodiment, the back frame (10) is configured by attaching a separate support arm (21) having a forward L-shape to the lower portion, but these may be integrated.

  The long hole (16) for guiding the pivot (15) at the front end of the seat frame (9) may be horizontal.

  In the above embodiment, the backrest (4) and the table (5) are pivotally attached to the base frame (8) by the same pivot (22), but the back frame (10) of the backrest (4) is raised. Alternatively, the lower end may be pivotally attached to the rear end of the base frame (8) with another pivot. At this time, the seat frame (9) is not tiltable and is fixed to the base frame (8), or the seat frame (9) is omitted and the seat body (3) is directly attached to the base frame (8). Just install it.

It is an external view of the chair with a table of one Embodiment of this invention. Similarly, it is an exploded perspective view. Similarly, it is a center vertical side view. Similarly, it is an IV-IV line enlarged longitudinal rear view of FIG. Similarly, it is a partially cutaway side view. Similarly, it is a partially cutaway side view with the backrest tilted backward.

Explanation of symbols

(1) Chair
(2) Mount
(3) Seat
(4) Backrest
(5) Table
(6) Armrest
(7) Frame
(8) Base frame
(9) Seat frame
(10) Back frame
(10a) downspout
(11) Side plate
(12) Yokohama
(13) Seat support plate
(13a) Support piece
(14) Seat bearing
(15) Axis
(16) Long hole
(17) (18) Recess
(19) seat shell
(20) Linkage
(21) Support arm
(21a) Standing piece
(21b) Forward piece
(22) (23) Axis
(24) Recess
(25) Blocking pad
(26) Backboard
(27) Gas spring
(27a) Rod
(27b) Push valve
(28) (29) Bracket
(30) Connecting bracket
(31) Pin
(32) Pressing lever
(33) Axis
(34) Support piece
(35) Operation cable
(35a) Wire
(36) Operation buttons
(37) Movable top plate
(37a) Thin part
(38) Bubo
(39) Top plate support arm
(39a) Standing piece
(39b) Forward facing piece
(40) Axis
(41) Stopper pin
(42) Guide hole
(43) Mounting piece
(44) Adjustment stopper
(45) Spindle
(46) Locking lever
(47) Recess
(S) Clearance

Claims (4)

On the back of the backrest that can be tilted backwards on the back of the seat body, a table comprising a support arm that can be rotated backward about the lower end, and a movable top plate that is pivotally attached to the upper end so as to be able to rotate up and down, With a table provided so as to be rotatable between a non-use position stored along the back of the backrest and a use position where the movable arm can be made substantially horizontal by turning the support arm backward. In the chair,
The support arm is substantially L-shaped in a side view in which the forward piece at the lower end extends forward through the lower part of the backrest, and the front end of the forward piece is front and rear in the base frame that supports the seat A chair with a table, which is pivotally attached to a substantially central portion of the direction so as to be pivotable with a pivot shaft facing in the left-right direction.   The chair with a table according to claim 1, wherein a gap is formed between the support arm and the back of the backrest when the table is rotated to a non-use position.   The chair with a table according to claim 1 or 2, wherein a concave portion capable of storing a movable table top of the table is provided on the back of the backrest. The backrest is attached to a L-shaped back frame in a side view and the front end of the front piece at the lower end of the back frame is pivotally attached to the base frame by a common pivot with the support arm. A chair with a table according to any one of the above.

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