JP4256234B2 - Armrest device in stacked chair - Google Patents

Description

  The present invention relates to an armrest device in a stacking chair that can stack a plurality of chairs and stack them.

Conventional armchairs for this type of stacking chair include horizontal armchairs at the top of the armrests standing on both sides of the seat, and the side edges of the armrests from a horizontal use position to a vertical nonuse position. Some chairs are stacked so that they can be rotated, and an armrest is set to a non-use position so that a plurality of chairs can be stacked and stacked (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-179318 (FIG. 1, FIG. 4, etc.)

  In the conventional armrest device described in Patent Document 1, the armrest rotated to the non-use position is provided on the inner surface of the armrest as a means for preventing the armrest from rotating to the use position in the reverse direction. When the armrest is turned upward, the locking piece is elastically deformed and gets over the locking rod that penetrates the horizontal frame rod and is positioned on the opposite side. Thus, the armrest is prevented from rotating in the reverse direction and is held vertically.

  Therefore, if the armrest is repeatedly rotated between the use position and the non-use position after a long period of use, the locking piece will sag or wear, and the armrest will be held stably in the non-use position. You may not be able to do it.

  Further, in the conventional armrest device, the armrest is pivotably fitted to the horizontal frame rod, and the locking rod penetrated through the horizontal frame rod is brought into contact with the stopper provided on the inner surface of the armrest so that it can be used horizontally. Since it is held at the position, an unpleasant contact sound may occur when the armrest is pivoted vigorously.

  The present invention has been made in view of the above-described problems, and enables an armrest to be stably held at a horizontal use position and a vertical non-use position by a simple means and has an appropriate resistance. An object of the present invention is to provide an armrest device in a stacking chair that can prevent generation of annoying sound by applying and rotating.

According to the present invention, the above problem is solved as follows.
(1) At the upper end of the armrest support rod that stands up from the side of the seat body, a pivoting rod that is substantially horizontal in the front-rear direction and that has a planing surface on the upper surface and outer surface of the outer peripheral surface is provided. the pivot 支杆, accommodated in a recess in the upwardly provided on the lower surface of the armrest facing the longitudinal direction and the pivot支杆, elbow hook, pivotally mounted on the pivot支杆around said pivot支杆By rotating the armrests together with the armrests while pressing the opposite surfaces between the armrests, resistance is given to the rotation of the armrests, and the armrests are moved to a substantially horizontal use position and a substantially vertical nonuse position. An elastic holding member that can be held is sandwiched, and the elastic holding member has a base piece that faces in the front-rear direction, and a plurality of obliquely upward elastic pieces that are elastically deformed in the vertical direction and project from the upper surface of the base piece. The base piece moves to the planing surface and stops. Armrest so as to hold the horizontal position of use and non-use position of the vertical.

(2) In the above item (1) , protrusions whose upper ends can be brought into contact with the lower surface of the armrests are provided on the left and right ends of the upper surface of the base piece.

(3) In the above item (1) or (2) , the plurality of elastic pieces are provided so that their inclination directions are alternately opposite to each other along the front-rear direction.

(4) In the above item (3) , the plurality of elastic pieces arranged in the same direction are provided by being shifted in the left-right direction away from each other.

(5) In any one of the above items (1) to (4) , a portion of the base piece facing each elastic piece is opened.
(6) In any one of the above items (1) to (5) , the center of the pivot support is shifted outward from the center of the armrest support rod.

According to invention of Claim 1, an armrest can be stably hold | maintained to a horizontal use position and a vertical non-use position by an elastic holding member.
In addition, since a resistance force is applied when the armrest is rotated, there is no possibility of generating an annoying sound even if the armrest is rotated vigorously.

The elastic holding member, with the armrest, it is possible to stably rotate, since the elastic holding member is not exposed to the outside, appearance is improved.

As it can thin the elastic holding member, with the degree of freedom in designing the pivot支杆and armrests increases, it becomes possible to miniaturize the entire armrest device.
Further, the armrest can be easily stopped and held at the use position and the non-use position only by forming a flat surface on the upper surface and the outer surface of the pivot.

According to the invention described in claim 2 , when the elastic holding member moves from one planing surface to the other planing surface, the base piece is also elastically deformed, and the resistance force when rotating the armrest is large. Therefore, there is no fear that the armrest in the use position or the non-use position will rotate unnaturally due to an external force, and is stably held in those positions.

According to the third aspect of the present invention, since each elastic piece is pressed against the armrest in a balanced manner, the elastic holding piece is not inclined to one side, and a stable holding force can be obtained.

According to the fourth aspect of the present invention, the size between the upper end portions of the left and right elastic pieces is increased, so that they are stably pressed against the armrest and the wobble of the elastic holding member is prevented.

According to the invention of claim 5 , since the elastic piece can be greatly elastically deformed, the holding force of the armrest can be increased.

According to the sixth aspect of the present invention, when the armrest is rotated to the non-use position, the inner side surface thereof is biased outward, and the size between the opposing surfaces of the left and right armrests becomes large. Can be stacked and stacked without hindrance.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view of the chair (1) of the present invention, FIG. 2 is a plan view, FIG. 3 is a side view, and a pair of left and right legs (2) (2) and a seat (3 ), A backrest (4), and a pair of left and right armrest devices (5) and (5).

  The left and right legs (2) are composed of a front leg (2a) that is rearwardly tilted (hereinafter referred to as the left side in FIG. 3) and a rear leg (2b) that is forwardly tilted. The back support rod (6) and the armrest support rod (7) having the same inclination are integrally provided.

  The front leg (2a) and backrest support heel (6), and the rear leg (2b) and armrest support heel (7) are located in the middle in the vertical direction. The rear leg (2b) and armrest support heel (7) are outward. It is couple | bonded by the connection member (8) so that it may be located in side view X shape.

  The front leg (2a), the backrest support collar (6), the rear leg (2b), and the armrest support collar (7) are integrally formed by a metal pipe having a substantially elliptical cross-sectional shape.

The backrest (4) is attached between the opposing surfaces of the left and right backrest support rods (6).
The opposing surfaces of the left and right connecting members (8) are connected by a horizontal gutter (9) that faces in the left-right direction.

  The left and right sides of the lower surface of the seat body (3) are pivotally attached to the inner surface of the connecting member (8) by a pivot (not shown) facing in the left-right direction slightly behind the recumbent rod (9). , The use position where the lower surface just before the pivot is in contact with the upper surface of the recumbent (9) and held almost horizontally, and the seat surface is in contact with the front surface of the backrest (4) by rotating upward It can be rotated to a position.

  The left and right armrest devices (5) are attached to the upper end of the armrest support rod (7) as follows.

  As shown in FIG. 4, the armrest device (5) is symmetrical and has the same structure, so only the left side is shown), an elbow rest mounting member (10), an elastic holding member (11), a pivot (12 ) And armrest (13).

  The armrest mounting member (10) includes a base frame (14) facing upward and press-fitted to the upper end portion of the armrest support rod (7), and a pivoting rod (15) connected to the upper end as a rearward horizontal line. The whole is integrally formed of an aluminum alloy or the like.

  As shown in the plan view of FIG. 5 and the rear view of FIG. 6, the axis (L1) of the pivot support (15) is the center in the front-rear direction of the base (14) and the armrest support rod (7). On the outer side of the line (L2), it is inclined by a required angle (α) (for example, 8 °), and is inclined in the front-rear direction so that the rear side is more outward than the front side.

  That is, the rear side is open outward so that the left and right pivots (15) form a square shape in plan view.

  A shaft hole (16) through which the pivot shaft (12) is inserted so as to be relatively rotatable penetrates through the center of the pivot support (15), and a planing surface (17) is formed between the upper surface and the outer surface of the outer peripheral surface. (17) is formed over the entire length in the longitudinal direction.

  As shown in the cross-sectional views of FIGS. 7 and 8, the elastic holding member (11) has a front-rear dimension substantially equal to that of the pivot (15) and a lateral width of the pivot (15). In each notch hole (18) in the flat substrate (19) which is slightly larger than the width of (17) and has a plurality of notch holes (18) formed along the longitudinal direction, The elastic pieces (20) that can be elastically deformed downwardly inclined from one inner end to slightly close upward and extend to the vicinity of the other inner end of the notch hole (18) are alternately oriented in the left and right directions. (19) is provided in one piece.

  The entire elastic holding member (11) is integrally formed of an elastically deformable synthetic resin such as polyacetal or spring steel. When spring steel is used, each elastic piece (20) can be integrally formed by pressing or cutting and raising.

  The armrest (13) is made of synthetic resin so that its front-rear dimension is substantially the same as the distance between the upper end of the armrest support rod (7) and the front surface of the backrest support rod (6) (see FIG. 3). ) In the slightly outward direction of the lower surface of the front end, as shown in FIGS. 9 to 11, the pivotal support (15) of the elbow rest mounting member (10) has a margin and restricts movement in the front-rear direction. Thus, an upward concave portion (21) that can be accommodated is formed. The recess (21) is inclined in the same direction as the pivot (15).

  The rear wall surface (22) and the front wall surface (23) with which the rear end and front end of the pivot support (15) in the recess (21) abut can support the rear end portion and the front end portion of the pivot (12), respectively. Support holes (24) and (24) are formed, and the front support hole (24) passes through the central portion of the front end of the armrest (13).

  On the lower surface of the armrest (13) just below the rear support hole (24), a female screw hole (25) that communicates with the support hole (24) and facing in the vertical direction is formed. 25), as shown in FIG. 4, when the rear end of the pivot (12) is fitted into the support hole (24), it enters the annular groove (26) on the outer peripheral surface of the pivot (12). A set screw (27) for retaining is screwed.

  To attach the armrest device (5) to the leg (2), first attach the base (14) of the armrest mounting member (10) by press-fitting it to the upper end of the armrest support rod (7), and then pivot it. The heel (15) is inserted into the recess (21) of the armrest (13) in a state where the elastic holding member (11) is placed on the planing surface (17) on the upper surface.

  Next, the pivot shaft (12) inserted from the front support hole (24) of the armrest (13) passes through the shaft hole (16) of the pivot support (15), and the rear end portion is supported by the rear support hole ( Mate to 24).

  At this time, the armrest (13) is pressed, and each elastic piece (20) of the elastic holding member (11) sandwiched between the lower surface of the recess (21) and the upper surface of the pivot (15) is slightly By elastically deforming downward, the pivot shaft (12) is fitted into the shaft hole (16) of the pivot support (15), and the elastic holding member is caused by the reaction force of the upward biasing force acting on the armrest (13). The base piece (14) of (11) is pressed against the upper surface of the pivot (15).

  Finally, the set screw (27) is screwed into the female screw hole (25) on the lower surface of the armrest (13), and its tip is inserted into the annular groove (26) at the rear end of the pivot (12), thereby Secure (12).

  As a result, the front end of the armrest (13) is supported so as to be rotatable around the pivot support (15) together with the elastic holding member (11), and the base piece (14) of the elastic holding member (11) is pivotally supported. When in contact with the planing surface (17) on the upper surface of the heel (15), the armrests (13) are not in danger of rotating unreasonably because they are in surface contact with each other in a wide region in the longitudinal direction.

  10 and 11 show cross-sectional views of the armrest (13) before and after the rotation. The armrest (13) is pivotally supported by the base piece (14) of the elastic holding member (11) before the rotation. Since it is in pressure contact with the planing surface (17) on the top surface of the flange (15), it is held in a horizontal use position.

  When the armrest (13) is in a horizontal state of use, the notch (13a) on the back surface of the front end abuts the upper part of the base (14) of the armrest mounting member (10) and rotates inward further. To be prevented.

  At this time, since the recess (21) in which the pivot support (15) is accommodated is formed to be inclined in the same direction as the pivot support (15), the left and right armrests (13) are shown in FIG. As shown by the solid line, they are substantially parallel to each other and face in the front-rear direction.

When the armrest (13) is grasped by hand and rotated outward from the use position of FIG. 10, as shown in FIG. 11, the base piece (14) of the elastic holding member (11) is attached to the pivot support (15). The armrest (13) stops at a position rotated by 90 ° by sliding to the planing surface (17) on the outer surface of the pivot support (15) while being pressed against the outer peripheral surface.
(15a) is a stopper projection that regulates the maximum amount of outward rotation of the armrest (13).

At this time, since the armrest (13) rotates around the pivot (15) whose axis is inclined outwardly, the armrest (13) is biased outwardly toward the rear side, and as shown by the two-dot chain line in FIG. The rear side of the armrest (13) of the arm is expanded outwardly, and the dimension between the opposing surfaces becomes larger toward the rear side.
As a result, as shown in FIG. 12, when nesting a plurality of chairs (1) in the front-rear direction, the opposite ends of the armrests (13) of the front and rear chairs (1) do not come into contact with each other, The front half of the armrest (13) is inserted into the inside of the rear half of the front armrest (13), so that the front and rear chairs (1) can be brought close to each other for nesting.

When the armrest (13) is rotated 90 ° outward, as shown in FIGS. 1, 2 and 11,
Since the inner surface of the armrest (13) is located outward from the inner end of the rear leg (2b) and the armrest support rod (7) integral therewith, as shown in FIG. 13, the chair (1) is stacked. When stacking, it is possible to prevent the armrest support rod (7) from coming into contact with the inner surface of the armrest (13) as well as the front leg (2a) in the upper chair.

  14 and 15 show a modification of the elastic holding member, and a plurality of substrates (28a) of the elastic holding member (28) formed of a synthetic resin or spring steel elastically deformable in the plate thickness direction are provided. The notch holes (29) are alternately shifted in the left-right direction, and in each notch hole (29), the notch holes are inclined slightly upward in an arc from one of the left and right inner ends. The elastic pieces (30) extending to the vicinity of the other inner end of (29) are provided integrally with the substrate (28a) so as to alternately face in opposite directions.

In addition, protrusions (31) and (31) are provided so as to protrude over almost the entire length on both left and right ends of the upper surface of the substrate (28a).
The top end of each elastic piece (30) is positioned substantially at the same level as or slightly above the upper end of the ridge (31).

  In order to assemble the elastic holding member (28) between the pivot support (15) and the armrest (13), as shown in FIG. 16, the upper end of each elastic piece (30) of the elastic holding member (28) Are in contact with or pressed against the lower surface of the recess (21) of the armrest (13) and elastically deformed slightly downward, so that the upper ends of both protrusions (31) are on the lower surface of the recess (21) and the substrate (28a). Are brought into contact with the planing surface (17) on the upper surface of the pivot (15).

  When the elastic holding member (28) having such a structure is used, the elastic pieces (30) and the left and right ridges (31) are in wide contact with the lower surface of the recess (21), so that the armrest (13) is loose. Sticking is prevented.

  Also, if the armrest (13) is rotated to the left or right, the substrate (28a) is either the outer peripheral surface (convex surface) between the upper surface and the side planing surface (17) of the pivot (15) or the upper surface. When sliding on the inner peripheral surface (convex surface) of the planing surface (17), the horizontal center of the substrate (28a) faces outward against the urging force of each elastic piece (30). In order to bend, a relatively large force is required to rotate the armrest (13). Therefore, the armrest (13) is stably held at the horizontal use position and the vertical non-use position.

The protrusion (31) as described above may be provided on the upper surface of the base piece (14) of the elastic holding member (11) described above.
Further, the elastic pieces (20) of the elastic holding member (11) may be arranged like an elastic holding member (28) shown in FIG.
The elastic pieces (20) and (30) may be only one of the left and right rows inclined in the same direction.

  The present invention can also be applied to a chair in which the armrest support rod (7) is erected substantially upright or slightly tilted forward.

  At this time, the middle part or the rear end part of the armrest (13) in the front-rear direction is pivotally supported by the armrest mounting member (10) having the tilted pivot support (15) as described above. That's fine.

  The armrest device of the present invention can be stacked, stored, or moved by rotating the armrest upward when not in use, for example, by applying it to a chair that is used in large conference rooms. Can be used for purposes.

It is a front view of the chair to which this invention is applied. Similarly, it is a plan view. Similarly, it is a side view. Similarly, it is an exploded perspective view of an armrest device. Similarly, it is a top view of an armrest attachment member. Similarly, it is a rear view of an armrest mounting member. It is an expansion vertical side view of the VII-VII line of FIG. Similarly, it is an enlarged vertical rear view of line VIII-VIII in FIG. It is the perspective view which looked at the armrest from the downward direction. FIG. 4 is an enlarged vertical rear view of line XX in FIG. 3. Similarly, it is an enlarged longitudinal rear view when the armrest is rotated to the non-use position. It is a side view when nesting chairs. Similarly, it is a side view when stacking. It is a perspective view which shows the modification of an elastic holding member. Similarly, it is an enlarged vertical front view of the XV-XV line of FIG. Similarly, it is an enlarged longitudinal rear view of the same portion as FIG. 10 with the elastic holding member of FIG. 14 attached.

Explanation of symbols

(1) Chair
(2) Leg
(2a) Front leg
(2b) Rear legs
(3) Seat
(4) Backrest
(5) Armrest device
(6) Back support heel
(7) Armrest support rod
(8) Connecting member
(9) Yokohama
(10) Armrest mounting member
(11) Elastic holding member
(12) Axis
(13) Armrest
(14) Basic
(15) The pivot
(15a) Stopper protrusion
(16) Shaft hole
(17) Planed surface
(18) Notch hole
(19) Board
(20) Elastic piece
(21) Recess
(22) Rear wall
(23) Front wall
(24) Support hole
(25) Female thread hole
(26) Annular groove
(27) Set screw
(28) Elastic holding member
(28a) Board
(29) Notch hole
(30) Elastic piece
(31) Projections

Claims (6)

At the upper end of the armrest support rod that stands up from the side of the seat body, a pivoting rod that is substantially horizontal in the front-rear direction and that has a planing surface on the upper surface and outer surface of the outer peripheral surface is provided. and housed in a recess in the upwardly provided on the lower surface of the armrest facing the longitudinal direction and the pivot支杆, elbow hook, pivotally mounted on the pivot支杆around, and the pivot支杆and armrests In the meantime, by rotating together with the armrests while pressing their facing surfaces, resistance can be given to the rotation of the armrests, and the armrests can be held in a substantially horizontal use position and a substantially vertical nonuse position. A flat plate having a base piece facing in the front-rear direction and a plurality of diagonally upward elastic pieces projecting on the upper surface and elastically deformable in the vertical direction; And the base piece moves to the planing surface and stops, Armrest device in the stacking chair, characterized in that was to hold the horizontal position of use and non-use position of the vertical. The right and left side ends of the upper surface of the base element, armrest apparatus in claim 1, wherein the stacking chair upper end provided with a contact capable of ridges on the underside of the armrest. The armrest device in the stacking chair according to claim 1 or 2 , wherein the plurality of elastic pieces are provided such that the inclination directions thereof are alternately opposite to each other along the front-rear direction. The armrest device in the stacking chair according to claim 3, wherein a plurality of elastic pieces arranged in the same direction are shifted from each other in the left-right direction. The armrest device in the stacking chair according to any one of claims 1 to 4 , wherein a portion of the base piece facing each elastic piece is opened. The armrest device in the stacking chair according to any one of claims 1 to 5 , wherein the center of the pivot support is shifted outward from the center of the armrest support rod.

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