JP4805246B2 - Upholstered chair - Google Patents

Description

  The present invention relates to a flip-up chair that is preferably used for a moving seat or a spectator seat in a stadium.

Conventionally, a seat-up type chair used for a moving seat or a spectator seat at a stadium is provided with a back, a seat, and seat support members provided on both sides of the back so that the seat can be seated. What is supported by the seat support member so as to be swingable between the position and the raised position is used. Further, in order to lock the seat at the use position, a stopper mechanism for regulating the raising / lowering range of the seat is provided inside the seat support member or between the seat and the seat support member (for example, see Non-Patent Document 1). ).
Aichi Co., “axona AICHI COLLECTION”, November 10, 2005, p. 304

  However, in the conventional seat-up type chair, since the seat is structured to be attached to the back via the seat support member, a gap is easily generated between the seat and the back, and the portion from the seated person's buttocks to the waist Could not be supported by the surface along the curved surface, and the sitting comfort was not sufficient. In addition, in a place where a plurality of chairs are installed in a lateral direction such as a stadium, seat support members are provided on both sides of each chair in order to make the chairs installable by changing the interval (pitch) between the chairs. The number of parts increases because it is necessary to provide them. On the other hand, if one chair support member is configured to be shared by adjacent chairs in order to reduce the number of parts, not only the pitch cannot be changed, but also at the installation site. There is a problem that installation work becomes complicated because it is necessary to assemble the chair.

  The present invention provides a seat-up type chair that has a small number of parts, is easy to assemble, has a high degree of freedom in arrangement, and is comfortable to sit on.

That is, the seat-up type chair according to the present invention includes the back, a base provided at the center of the lower end of the back, and the base so that it can swing between a seating use position and a raised-up position. And a leg connected to the base to support the spine and the seat, the base being formed integrally with the spine, the seat being used for the use It extends to both sides of the base in the position to the back, and the back and the seat in the use position form a continuous concave curved surface shape. Note that when the chair and its parts are referred to as up / down, left / right, front / rear, etc., it means the direction seen from the person sitting forward on the chair.

  According to the seat flip-up chair of the present invention, the seat is supported by the base provided at the center of the lower end of the back, so there is no need to provide seat support members on both sides of the back and the seat. As a result, the number of parts and the cost can be reduced, and it is not necessary to assemble the seat support member, the seat, and the back at the installation site, so that the work burden during installation can be reduced. In addition, the seat extends to the back across the base at the use position, and the back and the seat at the use position form a continuous concave curved surface shape, so that it follows the curved surface from the seated person's buttocks to the waist Thus, the seated person can be supported by a curved surface having a comfortable seat based on ergonomics without generating a large gap between the seat and the back. Furthermore, the smooth curved surface formed by the seat and the back gives the seated person an impression that it is comfortable to sit on, and is excellent in design (design). In addition, since the legs are attached only at one place (base), the burden during the attaching operation can be reduced and the installation interval (pitch) of the chairs can be easily changed.

  Here, if the seat is provided with a contact portion that contacts the base portion at the use position, and the base portion is provided with a stopper portion that contacts the contact portion and locks the seat at the use position, the base portion Since the seat is locked at the use position by itself, it is not necessary to provide a separate mechanism for locking the seat, and it is possible to provide a chair suitable for outdoor use exposed to wind and rain. it can.

  Further, if the urging means for constantly urging the seat from the use position toward the standing position is provided, and the urging means is housed in the seat, the urging is performed while keeping the chair in a simple shape. It is possible to provide an automatic seat upright chair suitable for outdoor use and the like, in which the seat automatically jumps to the standing position without exposing the means to the outside. The biasing means may be provided with a rib on the back surface of the seat and housed in the rib. In this way, the urging means can be accommodated while reinforcing the seat with the ribs and maintaining high design without making the entire seat thick. Further, if the standing position where the seat automatically jumps up by the urging means is, for example, an arbitrary position where the seat is raised up from a substantially horizontal use position to become substantially vertical, from 2/3 to 3/4, Even if both hands of the seated person are blocked, the user can easily sit down by pressing down on the buttocks without using their hands.

  Furthermore, if a gas spring, which is a small and lightweight device, is used for the urging means, the seat does not become too heavy, and the standing speed can be adjusted so that the seat stands smoothly. As a result, it is possible to provide a chair that is lightweight and has a high quality in which the seat stands up smoothly.

Moreover, if pivotally connected to a horizontal direction said base portion to the front Kiashi unit, such as rows of the auditorium to form a curve, even in auditorium arranged surrounding the substantially circular arena, The orientation of the chair can be adjusted in a subtle direction according to the curvature of the curve of the spectator seat row so that each chair faces the center of the stadium. This makes it possible to improve the seat viewing function without providing a complicated structure with a large number of parts, such as a chair turning means for simultaneously changing the orientation of a plurality of seats. In addition, the degree of freedom in designing the seat arrangement can be improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a flip-up chair according to the present invention will be described below in detail based on examples with reference to the drawings. Here, FIGS. 1A, 1B, and 1C are a plan view, a front view, and a front view showing a state where the seat is located at the use position in the first embodiment of the flip-up chair according to the present invention. 2 (a), (b), and (c) are plan views showing a state in which the seat is in the upright position of the seat-up type chair of the first embodiment shown in FIG. FIG. 3 is a front view and a side view, and FIG. 3 is an end view showing a cross section taken along line AA of FIG. FIG. 4 is an explanatory view showing the relationship between the position of the seat-up type chair of the first embodiment and the state of the gas spring, and FIGS. 5 (a), 5 (b) and 6 (a). (B) is explanatory drawing seen from the front side and the side which show the assembly method of the seat raising type chair of 1st Example, respectively, FIG. 7 is arrangement | positioning of the seat raising type chair of 1st Example. It is a top view which shows an example.

  As shown in FIGS. 1 (a) to 1 (c), FIGS. 2 (a) to (c), and FIG. 7, the flip-up chair 1 according to the first embodiment is installed on a corrugated floor 7 of an arena, for example. The back 2, the base 3 provided at the center of the lower end of the back 2, and the seat 4 supported by the base 3 by the seat shaft 40 in front of the back 2, and the base 3 is provided on the corrugated floor 7. It is attached and fixed (beam mounted) to the connected pipe 6. When the chair and its respective parts are referred to as up / down, left / right, front / rear, etc., it means the direction seen from the person sitting forward on the chair.

  Here, as shown in FIG. 3, the spine 2 is a plate-like body having a “<” shape in cross section, and is made of, for example, an injection molded product made of polypropylene. Thus, since the cross section has a “<” shape, it can be supported in a shape suitable for the human body structure from the waist to the back of the seated person.

  The base 3 has a substantially trapezoidal cross section and protrudes forward at the center of the lower end of the spine 2 and is molded integrally with the spine 2 by, for example, injection molding. As shown in FIGS. 5A, 5 </ b> B, 6 </ b> A, and 6 </ b> B, the base 3 has a recess 30 that is hollowed out in the shape of a rectangular parallelepiped near the center of the bottom, and covers the bottom of the base 3. A back seat base 32 having a plate and a projection 33 having a quadrangular cross section that fits into the recess 30 is attached. Further, a hole 48 through which the above-described seat shaft 40 is inserted is provided on the upper front side of the base portion 3, and the seat shaft 40 is fixed to the protruding portion 33 of the back seat base 32 with a bolt 100. As a result, the seat shaft 40 can be supported on the base 3 in a non-rotatable manner, and the chair 1 can be installed by holding the connecting pipe 6 between the back seat base 32 and a back seat clamp (not shown). Further, the base portion 3 has a stepped front surface, and the stepped portion functions as a stopper portion 31 that engages a contact portion 47 described later provided on the seat 4.

  The seat 4 is a substantially quadrangular plate-like body made of an injection molded product made of polypropylene, and two ribs 5 and a contact portion 47 are provided on the bottom surface of the seat 4. The rib 5 has a substantially triangular outer shape as viewed from the side and a rear part thicker than the front part. Each rib 5 is provided with a hole 48 through which a seat shaft 40 is inserted via a seat bush 49. Further, a substantially cylindrical space 42 is provided in the rib 5 on one side (right side in FIG. 5A) from the rear to the front, and a gas spring 43 connected to the seat shaft 40 is provided in the space 42. Is stored. The abutting portion 47 has a substantially triangular cross section, and a substantially semi-cylindrical surface (a surface on the rear side of the seat 4) on which the seat 4 at the use position abuts on the base 3 is a stepped portion of the stopper portion 31 of the base 3. The structure is engaged, and rubber (not shown) is bonded to the contact surface in order to reduce the impact at the time of contact with the stopper portion 31. As a result, the seat shaft 40 is inserted and the seat 4 is supported by the base portion 3 so as to be able to swing, and the swinging range (tilting range) of the seat 4 is flipped up by the contact portion 47 and the stopper portion 31. A range between the standing position and the substantially horizontal use position can be defined. Further, since the seat shaft 40 and the gas spring 43 are connected via the mounting portion 41 as will be described later, when the chair 1 is not used, the seat 4 automatically jumps up to the standing position.

  That is, the gas spring 43 here includes a cylinder 44, a piston rod 45, and a bush 46 provided at the tip of the piston rod 45. Then, for example, in order to set a position where the seat 4 is raised up from a substantially horizontal use position to reach a substantially vertical position by 2/3, the piston rod of the gas spring 43 is set at the standing position of the seat 4. A gas spring 43 adjusted so as to have a natural length 45 is installed in the space 42, and the bush 46 is connected to the seat shaft 40 with an attachment 41 so as to be offset from the central axis of the seat shaft 40. As a result, as shown in FIG. 4, as the seat 4 falls from the standing position toward the substantially horizontal use position, the piston rod 45 is pushed into the cylinder 44, and the seat 4 is urged from the use position toward the standing position. Will be.

  The seat shaft 40 is formed of a cylindrical body having an egg lug-like attachment portion 41 connected to the bush 46 of the gas spring 43 in the vicinity of the end portion, and is formed of, for example, a steel pipe. The seat shaft 40 is inserted into the hole 48 of the base portion 3 and the hole 48 of the seat 4 to support the seat 4 and is connected to the gas spring 43 at the attachment portion 41 as will be described later with respect to the assembly method of the chair 1. The seat 4 can be raised automatically.

  The assembly of the chair 1 as described above is performed as follows. First, as shown in FIGS. 5A and 5B, the back seat base 32 is attached to the concave portion 30 of the base 3, and the seat bush 49 is attached to each hole 48 provided in the rib 5 of the seat 4. A gas spring 43 is inserted into 42. Then, while avoiding the bush 46 of the gas spring 43, the seat shaft 40 is inserted through the upper side of the back seat base 32 and into the hole 4 of the seat 4 and the base 3. Next, as shown in FIGS. 6A and 6B, the bush 46 of the gas spring 43 is connected to the mounting portion 41 of the seat shaft 40 with screws 101, and the seat shaft 40 is connected to the protruding portion of the back seat base 32. Secure to 33 with bolts 100.

  As a result, as shown in FIG. 4, the gas spring 43 is moved to the back of the space 42 by tilting the seat 4 from the standing position (position indicated by B in FIG. 4) toward the use position (position indicated by A in FIG. 4). Since the piston rod 45 is pushed into the cylinder 44 in contact with the wall 52, the seat 4 is urged toward the standing position, and the seat 4 automatically stands up to the standing position when the chair 1 is not used. To do. Further, the gas spring 43 is not fixed in the space 42 but is slidable in the space 42 and has a natural length in the standing position. Therefore, by applying a force to the seat 4 from the outside, the gas spring 43 is substantially omitted from the standing position. The seat 4 can be further flipped up toward the vertical storage position (the position indicated by C in FIG. 4). At this time, as shown together with the seat 4 in the storage position in FIG. 4, a gap is generated between the tip of the cylinder 44 of the gas spring 43 and the wall 52 at the back of the space 42.

  Further, according to the chair 1 of the first embodiment, the seat 4 is supported by the base 3 provided at the center of the lower end of the back 2, so that the seat 4 sandwiches the base 3 in the use position. As shown in FIG. 3, the seat 4 and the back 2 in the use position continuously extend along the curved surface from the seated portion to the waist without generating a large gap as shown in FIG. 3. It is possible to form a typical concave curved surface and support the seated person with a concave curved surface suitable for seating based on ergonomics. Further, since it is not necessary to provide seat support members on both sides of the back 2 and the seat 4, the number of parts can be reduced and the assembling work can be facilitated.

  In addition, the chair 1 is supported by sandwiching the connecting pipe 6 between a back seat base 32 attached to the base 3 and a back seat clamp (not shown). In addition to being provided with a place, the chair 1 is attached at an angle that is pivoted in the horizontal direction with respect to the connecting pipe 6 by, for example, changing the attachment angle of the back seat base 32 with respect to a back seat clamp (not shown). Can do. As a result, in the chair 1 ′ according to the prior art that cannot be mounted at an angle turned in the horizontal direction, a bent portion with a linear arrangement as shown in FIG. 8A or a chair as shown in FIG. Whereas it was necessary to devise the mounting parts of the chair 1 so that a useless gap G occurs at the connecting portion due to the curvilinear arrangement (for example, radius = 6 m) or the useless gap G does not occur, In the chair 1 of the present embodiment, a useless gap G is not generated as shown in FIG. 7, and a large space in front of the chair 1 can be secured. In addition, since each chair 1 can be easily turned in the horizontal direction and attached, the seat viewing function can be improved by easily changing the direction of each seat without providing a complicated turning mechanism.

  FIGS. 9 (a) and 9 (b) show a second embodiment of the seat-up chair according to the present invention. The chair 1 can be used, for example, for a moving bleacher, and the armrest 8 is provided, the shape of the back clamp 50 is different, and the entire chair 1 is stored so as to be substantially horizontal. Unlike the previous embodiment in that a rotation mechanism 9 is provided as a position, it is configured in the same manner as the previous embodiment in other points.

  Here, the armrest portion 8 is configured to be swingable between an elbow strut 81 attached to the connecting pipe 6 on both sides of the back 2 and the seat 4, and a substantially vertical storage position and a substantially horizontal use position. And a substantially triangular armrest 82 supported at the tip. Accordingly, when the chair 1 is used, as shown in FIG. 9A, the armrest portion 8 can support the seated person's elbow with the armrest 82 in a substantially horizontal use position, and when the chair 1 is stored. As shown in FIG. 9B, the armrest 82 can be flipped up to store the chair 1 in a compact manner.

  The back seat clamp 50 has, for example, a planar shape as shown in FIG. 10, and is attached to the lower surface of the back seat base 32 with a bolt 100 using an arc-shaped hole 51 to sandwich the connecting pipe 6. Here, since the hole 51 has an arc shape, the position of the hole into which the bolt 100 on the base 3 side is inserted can be set to an arbitrary position on the arc, and the base 3 is turned in the horizontal direction by loosening the bolt 100. By doing so, the direction of the back 2 and the seat 4 can be easily changed.

  The rotation mechanism 9 is provided at, for example, the lower part of the connecting pipe 6. The two supporting pillars 90 extending at a distance from each other in the extending direction of the connecting pipe at the lower part of the connecting pipe 6 and the supporting pillar 90 are substantially vertical. The side plate 91 is supported so as to be swingable between the standing position and the substantially horizontal storage position. The substantially rectangular side plate 91 is provided with a recess 92. When the storage chair 1 is used, the protrusion 93 provided on the side of the support column 90 is formed in the recess 92 as shown in FIG. When the chair 1 is fixed by being engaged and stored, the chair 1 is lifted up slightly to release the engagement, and the chair 1 can be tilted forward as shown in FIG. 9B. .

  As a result, when the chair 1 is set to the storage position, the seat 4 and the armrest portion 8 in contact with the floor surface of the floor stage 7 jump to the storage position by the weight of the chair and have a compact shape. Further, as in the previous embodiment, the seat 4 automatically stands up from the use position to the standing position, and in the use position, the seated person can be supported by a concave curved surface suitable for seating based on ergonomics. It is possible to provide a flip-up chair that can easily change the direction of each seat and improve the seat viewing function without providing a simple turning mechanism.

  In addition to the manufacturing method of the present embodiment, the back 2 and the seat 4 may be manufactured by, for example, nylon press molding or aluminum die casting. Further, a compression spring or a torsion spring may be used as the biasing means, and the storage position may be stored in the back 2 or the base 3 instead of the rib 5 of the seat 4. If the urging means is housed inside the back 2 or the base 3 in this way, the seat 4 can be reduced in weight and can be automatically erected with a small force. Furthermore, the shape of the hole 51 of the back seat clamp 50 can take an arbitrary shape, and the hole may be provided at a position corresponding to the direction in which the chair 1 is directed. In addition, well-known means can be employed for the stopper and the rotation mechanism.

  Thus, according to the seat-up type chair of the present invention, the seat is supported by the base provided at the center of the lower end of the back, so there is no need to provide seat support members on both sides of the back and the seat. As a result, the number of parts and the cost can be reduced, and it is not necessary to assemble the seat support member, the seat, and the back at the installation site, so that the work load at the installation site can be reduced. In addition, the seat extends to the back through both sides of the base at the use position, and the back and the seat at the use position form a continuous concave curved surface shape, so there is a large gap between the seat and the back. It is possible to support the seated person with a curved surface that is ergonomic and comfortable to sit on. Furthermore, the smooth curved surface formed by the seat and the back gives the seated person an impression that it is comfortable to sit on, and is excellent in design (design). In addition, since the legs are attached to the base only at one place, the burden during the attaching operation can be reduced and the installation interval (pitch) of the chair can be easily changed.

The state which has the seat in use position of 1st Example of the seat-up type chair concerning this invention is shown, (a) is the top view, (b) is the front view, (c) is the side view. is there. The state in which the seat is in the upright position of the first embodiment of the flip-up chair according to the present invention is shown, (a) is a plan view thereof, (b) is a front view thereof, and (c) is a side view thereof. is there. It is an end elevation which shows the cross section along the AA line of FIG.1 (b) of the seat-up type chair shown in FIG. It is explanatory drawing which shows the state of a gas spring about the seat in each position of 1st Example of the seat-up type chair concerning this invention. 1 shows a method of assembling a seat bush, a gas spring, and a seat shaft of a first embodiment of a seat-up type chair according to the present invention, (a) is an explanatory view seen from the front, and (b) is a side view thereof. FIG. The gas spring attaching screw 101 and the fixing method of a seat shaft of the first embodiment of the seat up type chair according to the present invention are shown, (a) is an explanatory view seen from the front, and (b) is seen from the side. It is explanatory drawing. It is a top view which shows the arrangement | positioning state of a chair of 1st Example of the seat-up type chair concerning this invention. (A), (b) is a top view which shows the arrangement | positioning state of the seat-up type chair concerning a prior art. The 2nd Example of the seat-up type chair concerning this invention is shown, (a) is a side view which shows the state which each part exists in a use position, (b) is a side view which shows the state which each part exists in a storage position. . It is a top view which shows the back seat clamp of 2nd Example of the seat-up type chair concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2 Back 3 Base 4 Seat 5 Rib 6 Connecting pipe 7 Step floor 8 Armrest 9 Turning mechanism 30 Recess 31 Stopper 32 Back seat base 33 Protrusion 40 Seat shaft 41 Attachment 42 Space 43 Gas spring 44 Cylinder 45 Piston Rod 46 Bush 47 Contact portion 48 Hole 49 Seat bush 50 Back seat clamp 51 Hole 52 Wall 81 Elbow strut 82 Armrest 90 Strut 91 Side plate 92 Recess 93 Protrusion 100 Bolt 101 Screw G Gap

Claims (5)

A back, a base provided at the center of the lower end of the back, a seat supported by the base so as to be swingable between a seating use position and a raised standing position, and connected to the base The chair is a flip-up chair that comprises a back and a leg that supports the seat,
The base is formed integrally with the spine,
The seat extends through the sides of the base to the back in the use position;
The chair in which the back and the seat in the use position form a continuous concave curved surface shape. The seat is provided with a contact portion that contacts the base at the use position,
The chair according to claim 1, wherein the base is provided with a stopper portion that comes into contact with the contact portion and locks the seat at the use position. Biasing means for constantly biasing the seat from the use position toward the standing position;
The chair according to claim 1 or 2, wherein the urging means is housed inside the seat.   The chair according to claim 3, wherein the biasing means is a gas spring. It said base is pre Kiashi portion pivotably coupled in the horizontal direction with respect to the chair according to any one of claims 1 to 4.

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