JP2011045570A - Swivel chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a swivel chair capable of solving the problem peculiar to a conventional swivel chair that it is difficult to form a relatively wide baggage housing space where it is easy to take baggage in and out below a seat. <P>SOLUTION: The swivel chair includes a leg body, a support base part rotatably supported by the leg body, and a seat disposed on the support base part, and the baggage housing space for housing baggage so as to be freely taken in and out is formed between a baggage mounting surface formed below the seat and the back surface of the seat. The seat is supported by the support base part through a cross beam, the cross beam is U-shaped in the front view with a roughly flat part in the middle, and the upper surface of the flat part forms at least a part of the baggage mounting surface. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a swivel chair suitably used in an office or the like.

  2. Description of the Related Art Conventionally, a swivel chair that can suitably follow the movement of a seated person in the left-right direction is known. Such a swivel chair is preferably used in an office, for example. However, a worker who uses the swivel chair may use books, printed materials, etc. necessary for office work or office equipment such as a personal computer. In addition, since there are various kinds of luggage such as personal belongings such as bags, there is a demand to secure the place for placing them as much as possible. However, the conventional swivel chair does not have any space for storing luggage as described above (see, for example, Patent Document 1). For this reason, in the past, these cargoes were mostly dealt with by placing them on the top of a desk, separately placing or storing them on a wagon or the like, or placing them directly on the floor. However, placing the luggage on the top of the desk may reduce the work area of the office worker and reduce the work efficiency. When using a wagon or the like, the seated office worker and the luggage will be separated from each other. There are cases where access to luggage is poor and convenience is not good. In addition, when placing luggage directly on the floor, problems such as falling or stepping on the luggage with a chair or legs have occurred.

  In particular, the so-called free-address-type office form in which office workers do not have specific seats and work at appropriate positions such as large tables has become widespread. In a free address type office form, the place where a worker's luggage is placed is often limited. For this reason, it is desirable to take measures to ensure that the baggage can be secured at a position as close as possible to the worker sitting on the swivel chair in a state that does not hinder the work of the worker and that the baggage can be handled easily. It was.

  In order to meet such a demand, a load placement surface is provided below the seat, and a load storage space is provided on the load placement surface and the back surface of the seat so that the load can be taken in and out freely. Conceivable. However, in view of the structure of a conventional swivel chair, it must be said that it is a difficult task to form a luggage storage space that can accommodate a relatively large luggage in such a place.

JP 2003-334125 A

  The present invention has been made by paying attention to the above circumstances, and has a problem inherent in a conventional swivel chair that it is difficult to form a luggage storage space that is relatively wide and easy to load and unload luggage under the seat. The purpose is to eliminate.

  That is, the swivel chair of the present invention includes a leg, a support base that is rotatably supported by the leg, and a seat disposed on the support base, and is provided below the seat. A swivel chair in which a load storage space is formed between the load placement surface and the back surface of the seat so that the load can be inserted and removed freely, and the seat is supported by the support base via a cross beam. The horizontal beam has a U-shape in front view with a substantially flat flat portion in the middle, and the upper surface of the flat portion forms at least a part of the load placement surface. And

  In such a case, since a luggage storage space is formed between the luggage placement surface provided below the seat and the back surface of the seat, it is as close as possible to the worker sitting on the swivel chair. A certain swivel chair itself can accommodate luggage in a state that does not hinder the work of the office worker, and can suitably suppress the above-mentioned problems such as the desk top plate becoming narrower. Become. In addition, since the luggage storage space accommodates the luggage in a removable manner, the accommodated luggage can be easily handled. Since the transverse beam is U-shaped when viewed from the front, a sufficient space can be formed between the seat and the support base without difficulty, and the width in the vertical direction of the load storage space can be set to various loads. The desired width can be set, and the luggage can be accessed from the front of the chair. Furthermore, since the cross beam has a substantially flat flat portion in the middle, the flat portion can be used as a part of the load placement surface, and the load placement surface can be secured widely. It will be possible.

As long as the seat is cantilevered by the support base via the transverse beam only at the front edge, and the luggage storage space is also opened in the left-right direction and the rear, not only the front but also the left and right The luggage can be accessed from the rear.
Examples of the chair to which the present invention is applied include those in which the backrest is integrated with the seat.

  As a more specific aspect of the seat, the seat includes a seat frame that forms a pair of right and left supported on both ends of the cross beam, and a tension fabric stretched between the both seat frames. be able to. With such a configuration, a large luggage storage space can be formed between the tensioned place having a relatively small thickness and the luggage placement surface.

  As a more specific aspect of the swivel chair to which the present invention is applied, the horizontal beam includes a pair of mounting walls that are directly or indirectly in close contact with at least inner surfaces of the left and right seat frames at both left and right ends. Things can be mentioned.

  As a specific aspect of the load placement surface, there is one in which the load placement surface is configured by an upper surface of a flat portion of the cross beam and an upper surface of a shelf plate provided on a support base. As an aspect of the above, there can be mentioned one in which the load placing surface is constituted by the upper surface of the flat portion of the transverse beam and the upper surface of a shelf plate suspended and supported by the seat.

  The present invention can also be applied to the case where the seat and the backrest are independently formed. In this case, the backrest separate from the seat is supported by the support base so as to be tiltable. It is possible to employ a configuration including a synchro tilt mechanism for tilting the backrest and the seat in conjunction with each other at a constant ratio. In this configuration, the synchro tilt mechanism allows the front edge of the seat to be tiltably supported by an upper open U-shaped horizontal beam rotatably disposed at the front of the support base, and the rear of the seat. It is preferable that the edge portion is connected to the back support rod of the backrest. As a more specific aspect of such a configuration, the seat includes a pair of left and right seat frames supported at both ends of the transverse beam, and a seat surface forming member spanned between the both seat frames. And the backrest includes a backrest surface forming member supported by the back support rod.

  As described above, according to the present invention, a swivel chair that can solve the problems inherent in a conventional swivel chair that it is difficult to form a luggage storage space that is relatively wide and easy to load and unload a load below the seat. Can be realized.

1 is an overall perspective view showing an embodiment of the present invention. The perspective view which abbreviate | omits and shows the front side of the embodiment partially. The disassembled perspective view which abbreviate | omits and shows the front side of the embodiment partially. The perspective view which abbreviate | omits and shows the back side of the embodiment partially. The disassembled perspective view which abbreviate | omits and shows the back side of the embodiment partially. The front view which abbreviate | omits the half part and leg body of a tension fabric and shows the same embodiment. The top view which abbreviate | omits the half part and leg body of a tension fabric and shows the same embodiment. The right view which abbreviate | omits and shows the embodiment partially. AA line end view in FIG. The BB line end view in FIG. The rear view which showed the state before tensioning of the tension fabric of the embodiment. The CC line expanded end elevation figure in FIG. The DD line enlarged end elevation in FIG. The EE line enlarged end elevation in FIG. The schematic end elevation which shows the connection part of the flame | frame and beam in other embodiment. The side view which shows schematically the rotation chair in other embodiment.

  Hereinafter, an embodiment when the present invention is applied to an office rotary chair will be described with reference to FIGS.

  As shown in FIG. 1, the chair includes a leg 1, a support base 3 that is rotatably supported by the leg 1, and a seat 5 and a backrest 7 that are supported by the support base 3. It becomes.

  As shown in FIG. 1, the leg body 1 includes a leg blade type leg base 11 having casters 9 and leg struts 13 erected at the center of the leg base 11. The leg strut 13 is a normal one mainly composed of a gas spring, and the support base 3 is attached to the upper end of the leg strut 13.

  As shown in FIGS. 3 to 8, the support base 3 has a substantially triangular shape in plan view gradually narrowing toward the rear, and a bottom wall 3 a attached to the upper end of the leg support 13, The peripheral wall 3b is provided on the periphery of the bottom wall 3a, and the top wall 3c is attached to the upper end of the peripheral wall 3b. The support base 3 is provided with an operation lever 3d for controlling the gas spring of the leg 1.

  As shown in FIGS. 1, 3, and 6 to 8, the seat 5 includes a pair of left and right seat frames 15, and a flexible seat 17 that is stretched between the two seat frames 15. A front cross beam 21 is formed between the front end portions 15b of the both seat frames 15 while forming a space 19 between the seat stretch fabric 17 and applies tension to the seat stretch fabric 17 in the interposed state. It has.

  As shown in FIGS. 1, 3, and 6 to 8, the backrest 7 includes a back frame 23 that forms a pair of left and right, and a flexible back tension fabric 25 that is stretched between the back frames 23. And an upper horizontal beam 29 that is interposed between the upper portions 23a of the both back frames 23 while forming a space 27 between the upper and lower tension grounds 25 and applies tension to the back tension ground 25 in the interposed state. A lower horizontal beam 33 is provided between the lower portions 23b of the both back frames 23 while forming a space 31 with the back tension fabric 25, and applies tension to the back tension fabric 25 in the interposed state. It becomes.

  The seat frame 15 and the back frame 23 are continuous as shown in FIGS. 1 to 8 (the continuous seat frame 15 and the back frame 23 may be collectively referred to as “frame F”). The seat 5 and the backrest 7 are integrated. That is, the left seat frame 15 and the left back frame 23, and the right seat frame 15 and the right back frame 23 are integrally formed by integrally molding a single continuous metal material.

  As shown in FIGS. 8 to 10, mounting grooves 35 for attaching the seating ground 17 and the backrest 25 are formed on the outer side surfaces Fa of the left frame F and the right frame F, respectively. Yes. These mounting grooves 35 are arranged at positions closer to the front surface Fc than the back surface Fb of each frame F. Here, the back surface Fb means the bottom surface in the case of the seat frame 15 and the back surface in the case of the back frame 23. Further, the front surface Fc means the upper surface in the case of the seat frame 15 and the front surface in the case of the back frame 23.

  As shown in FIG. 1, FIG. 3, FIG. 6 to FIG. 8, and FIG. 11 to FIG. 13, the seat tension fabric 17 and the back fabric 25 (hereinafter may be collectively referred to as “stretch fabric M”). , Which is integrally formed by cutting a mesh-like upholstery material formed by weaving or knitting synthetic resin yarn into a predetermined shape, and existing from the front surface Ma side to the back surface Mb side as the seating surface It has translucency so that can be visually recognized.

  As shown in FIG. 11 and FIG. 13, the right and left edge portions Mc of the upholstery M are provided with a pushing member 37 having a band shape and having rigidity. The pushing member 37 is provided continuously along the edge Mc of the stretch fabric M, and is attached to one side of the edge Mc of the stretch fabric M, that is, the back surface Mb by sewing or the like. Yes. The pushing member 37 is made of synthetic resin or the like, has a thickness dimension T1 that can be inserted into the mounting groove 35, and has a width dimension W1 larger than the opening dimension of the depth dimension of the mounting groove 35. I have it.

  Then, as shown in FIG. 13, each edge Mc of the tension fabric M is inverted and inserted into the attachment groove 35 provided on the outer surface Fa side of the frame F together with the pushing member 37, thereby M is stretched between the left and right frames F. In this state, a tension is applied to the tension fabric M by interposing the front horizontal beam 21, the upper horizontal beam 29, and the lower horizontal beam 33 between the left and right frames F. The tension fabric M to which tension is applied in this way is in a form along the shape of the left and right frames F. That is, the left and right back frames 23 have protrusions 23c protruding forward corresponding to the waist shape of the seated person in the vicinity of the lower ends, and the backrest 25 is tensioned by the lower horizontal beam 33. Thus, it is stretched so as to form a protruding shape corresponding to the protruding portion 23c.

  Further, the edge portions Md and Me not supported by the left and right frames F of the upholstery M are bag-shaped as shown in FIGS. 3, 11 and 12, and the edges Md and Me A transparent core member 39 is incorporated in the interior. Specifically, the edge Md of the upholstery M (sitting upholstery 17) located at the front edge of the seat 5 and the edge of the upholstery M (backing up ground 25) located at the upper edge of the backrest 7 A core material 39 is provided on each Me. Each of these core members 39 is formed by cutting a transparent sheet material into a strip having a predetermined length, and there is a core member 39 between both end portions 39a of each core member 39 and the pushing member 37. The flexible deformation part 41 which is not formed is formed.

  As shown in FIGS. 3 to 6, the front cross beam 21 has a U-shape when viewed from the front with a substantially flat flat portion 21a in the middle, and the inner side surfaces of the left and right seat frames 15 at the left and right end portions 21b. 15a is provided with a pair of mounting walls 45 in direct close contact with each other. Each of the mounting walls 45 is fixed to the corresponding seat frame 15 using a plurality of bolts 47 serving as fixing tools. Specifically, the mounting wall 45 is fixed to the seat frame 15 by fastening two bolts 47 penetrating the mounting wall 45 to nuts 49 embedded in the seat frame 15. In addition, the both end parts 21b of the front cross beam 21 are each provided with the exterior wall 51 which clamps the seat frame 15 in cooperation with each said attachment wall 45, respectively. The mounting wall 45 has a shape extending along the seat frame 15, and the fitting portion 53 constituted by the mounting wall 45 and the exterior wall 51 is long before and after extending along the seat frame 15. It has a form. Accordingly, the mounting wall 45 is set so that the longitudinal dimension L2 in the direction along the seat frame 15 is larger than the thickness dimension T2.

  As shown in FIGS. 2 to 7 and 10, the upper horizontal beam 29 is curved so that a central portion 29 a protrudes rearward, and the inner side surfaces of the left and right back frames 23 are formed on the left and right end portions 29 b. 23d is provided with a pair of mounting walls 55 that are in direct close contact with each other. Each of the mounting walls 55 is fixed to the corresponding back frame 23 by using a plurality of bolts 57 as fixing devices. Specifically, the mounting wall 55 is fixed to the back frame 23 by fastening two bolts 57 penetrating the mounting wall 55 to a nut 59 embedded in the back frame 23. Note that both end portions 29b of the upper horizontal beam 29 are respectively provided with exterior walls 61 that sandwich the back frame 23 in cooperation with the mounting walls 55. The mounting wall 55 has a shape extending along the back frame 23, and the fitting portion 63 formed by the mounting wall 55 and the exterior wall 61 is long vertically extending along the back frame 23. It has a form. Thus, the mounting wall 55 is set such that the longitudinal dimension L3 in the direction along the back frame 23 is larger than the thickness dimension T3.

  As shown in FIGS. 2 to 7 and 9, the lower horizontal beam 33 joins the vicinity of the protruding portion 23 c of the back frame 23 protruding forward corresponding to the waist shape of the seated person, The left and right central portions 33a are curved so as to protrude rearward, and the left and right end portions 33b are provided with mounting walls 65 that make pairs that are in direct contact with the inner side surfaces 23d of the left and right back frames 23, respectively. Yes. Each of the mounting walls 65 is fixed to the corresponding back frame 23 by using a plurality of bolts 67 as fixing tools. Specifically, the mounting wall 65 is fixed to the back frame 23 by fastening two bolts 67 penetrating through the mounting wall 65 to a nut 69 embedded in the back frame 23. In addition, both end portions 33b of the lower horizontal beam 33 are respectively provided with exterior walls 71 that sandwich the back frame 23 in cooperation with the mounting walls 65. The mounting wall 65 has a shape extending along the back frame 23, and the fitting portion 73 formed by the mounting wall 65 and the exterior wall 71 is long vertically extending along the back frame 23. It has a form. Thus, the mounting wall 65 is set such that the longitudinal dimension L4 in the direction along the back frame 23 is larger than the thickness dimension T4.

  As shown in FIGS. 2 and 8, the chair according to the present embodiment thus configured is configured such that the seat 5 and the backrest 7 are integrated, and the seat 5 and the backrest 7 are in front of the seat 5. Only the edge 5c is cantilevered via a cross beam 21 provided integrally with the support base 3. In other words, the seat 5 and the backrest 7 are cantilevered by the front transverse beam 21. A load placing surface 75 is provided between the support base 3 and the seat 5, and the load B 1 can be inserted and removed freely between the load placing surface 75 and the back surface 5 a of the seat 5. A luggage storage space 77 is formed.

  As shown in FIGS. 2 and 3, the load placement surface 75 includes an extending portion 79 in which a part of the outer edge 75 a is positioned outside the outer edge 3 e of the support base 3 in a plan view. The extending portion 79 is provided with dust removing means 81. That is, the luggage placement surface 75 in this embodiment is formed by the upper surface 21 c of the flat portion 21 a of the front cross beam 21 and the upper surface 83 a of the shelf board 83 that is detachably mounted on the support base 3. In other words, the shelf board 83 is provided so as to cover the upper surface 3 f of the support base 3, and a main part of the luggage placement surface 75, that is, a part of the luggage placement surface 75 is provided on the shelf board 83. The part is formed.

  As shown in FIGS. 2 to 8, the shelf board 83 includes a shelf body 85 that forms a part of a luggage placement surface 75 for removably supporting the luggage B1 on the upper surface 83a thereof, and the shelf 83 And an outer fitting wall body 87 provided on the lower surface of the plate body 85 and detachably fitted to the support base 3.

  The shelf main body 85 is placed on the upper surface 3f of the support base 3 and has a larger area than the support base 3 in a plan view, and is located outside the support base 3. A plurality of through-holes 89 constituting the dust removing means 81 are provided at the site. The shelf main body 85 has an area larger than the A4 size in plan view, and includes curved portions 85b for preventing the load B1 from falling on the left and right side edges 85a. The shelf body 85 is disposed with its center portion substantially coincident with the rotation center O of the support base 3 that is the axis of the leg support 13, and the load placement surface 75 is disposed on the support base 3. It is formed at a position including the rotation center O.

  The outer fitting wall body 87 includes a holding portion 87 a that overlaps the outer peripheral surface 3 g of the support base 3 and a retaining portion 87 b that overlaps the bottom surface peripheral portion 3 h of the support base 3. The front surface is opened so that it can be detached from the rear. The outer fitting wall body 87 includes a rib 87 c for connecting the outer surface of the holding portion 87 a to the lower surface of the shelf board main body 85.

  Moreover, the chair concerning this embodiment has the armrest 89, as shown in FIG. As shown in FIGS. 3 to 5, 8, and 14, the armrest 89 is integrally formed with the exterior wall 71 of the lower horizontal beam 33, and the outer surface 33 c of the lower horizontal beam 33 and the armrest The outer surface 89a of 89 is smoothly integrated. The armrest 89 is provided so as to extend forward from the backrest 7, and an armrest main body 91 supported by the backrest 7, and an armrest pad 93 provided on the armrest main body 91, It comprises.

  The armrest main body 91 includes an elbow post 95 provided integrally with the lower horizontal beam 33 and an elbow frame 97 provided at the tip of the elbow post 95, and the elbow pad 93 on the elbow frame 97. Wearing. Specifically, the elbow frame 97 has a hard lower frame portion 97b having a pair of front and rear attachment portions 97a on the upper surface thereof, and a hard frame having both front and rear ends attached to the attachment portion 97a of the lower frame portion 97b. The lower frame portion 97b and the upper frame portion 97c form a rigid loop shape. In other words, the window portion 99 is formed by the lower frame portion 97b and the upper frame portion 97c. A soft elbow pad 93 is provided on the upper frame portion 97c. A hook 101 is provided on the opening edge 99a of the window 99 for hanging a bag or other luggage B2 in a state of not protruding from the outer edge 93a of the elbow pad 93 in plan view. That is, the hook 101 is formed integrally with the window 99 of the elbow frame 97. In other words, the hook 101 is formed by deforming the lower side 99b of the opening edge 99a of the window 99.

  Moreover, the chair concerning this embodiment is provided with the hanger 103 for hanging clothing, as shown in FIG. 2 thru | or FIG. The hanger 103 is integrally provided in a suspended posture on the lower side 29c of the upper horizontal beam 29, and the hanger body 105 for hanging clothes and the hanger main body 105 between the upper horizontal beam 29 are provided. The suspension member 109 is suspended and supported on the upper horizontal beam 29 in a state where the gap 107 is maintained.

  As described above, with the configuration according to the present embodiment, the problem inherent to the conventional swivel chair that it is difficult to form a luggage storage space that is relatively wide and easy to load and unload luggage under the seat is solved. Therefore, it is possible to realize a swivel chair that is particularly useful in an office that can be used.

  The present invention is not limited to the embodiment described in detail above.

  In the above-described embodiment, the horizontal beam is provided with a pair of mounting walls that are in direct contact with at least the inner surface of the left and right seat frames at both left and right ends. The left and right end portions may be provided with a pair of attachment walls that are in intimate contact with at least the inner surface of the left and right seat frames. Here, what is shown in FIG. 15 shows a mode in which the cross beams 21, 29, and 33 are indirectly attached to the frame F. That is, a gap may be provided between the mounting walls 45, 55, and 65 of the horizontal beams 21, 29, and 33 and the frame F, and an interposed member such as the spacer S may be provided in the gap. If it is such, the tension | tensile_strength of the tension fabric M can be adjusted by changing the thickness of the spacer S to interpose variously.

  In the above-described embodiment, the swivel chair with the backrest integrated with the seat has been described. However, the present invention is not limited to the seat with the backrest integrated with the seat. The present invention can be similarly applied to a device that does not or a backrest that is provided separately from the seat.

  As shown in FIG. 16, the backrest is provided separately from the seat. FIG. 16 is a schematic side view schematically showing the swivel chair, and the same or corresponding parts as those in the embodiment shown in FIGS. That is, the swivel chair shown in FIG. 16 includes a leg 1, a support base 3 that is rotatably supported by the leg 1, a seat 5 disposed on the support base 3, and a support shaft of the support base 3. And a backrest 7 provided on a back support rod 22 pivotally supported by 3j so as to be able to tilt backward. The swivel chair includes a synchro tilt mechanism 8 for tilting the seat 5 and the backrest 7 in an interlocking manner at a constant ratio.

  The synchro tilt mechanism 8 supports the front part of the seat 5 via a shaft 5b so that the front part of the seat 5 can rotate and move back and forth at both ends extending above the front transverse beam 22 fixed to the support base part 3. The lower end of a downward arm 61 extending downward from the rear portion of the seat 5 is pivotally supported on the back support rod 22 via a shaft 61a. The front cross beam 22 constituting the synchro tilt mechanism 8 has a U-shape in front view having a substantially flat flat portion 21a in the middle according to the embodiment shown in FIGS. A load placement surface 75 is formed by the upper surface 21 c of 21 a and the upper surface of the shelf plate 83 provided on the support base 3. In the other embodiment, the upward U-shaped horizontal beam is rotatably disposed at the front portion of the support base 3. The front transverse beam 21 and the downward arm 61 are vertically moved so as to form a luggage storage space 77 having a sufficient capacity between the luggage placement surface 75 formed on the support base 3 and the lower surface of the seat 5. Has a relatively large dimension in the direction. That is, the front transverse beam 21 and the downward arm 61 have dimensions that can sufficiently secure the volume of the luggage storage space 77 even when the rear portion of the seat 5 sinks due to the synchronization operation of the synchronization tilt mechanism 8. is there. Specifically, the downward arm 61 is a pair of columnar members extending downward from the left and right ends of the rear end portion of the seat 5 or a single sheet extending downward from the rear end portion of the seat 5. A wall-like thing can be considered. If the downward arm 61 is wall-shaped, the rear side of the luggage storage space is closed by the downward arm, which is suitable for use in a place where it is desired to prevent theft from the rear.

  The seat 5 in the embodiment shown in FIG. 16 includes a pair of left and right seat frames 15 supported at both ends of the cross beam 21 and a seat surface forming member 18 spanned between the both seat frames 15. It is. Further, the backrest 7 includes a backrest surface forming member 26 supported by the back support rod 22. Here, as the seat surface forming member 18 and the backrest surface forming member 26, various members can be adopted. For such a thing, a tension fabric, a plate-like member, etc. can be considered, and as a more specific thing, for example, a mesh-like tension fabric, a resin mesh-like member, a resin shell-like member, or Examples thereof include a plate-like member made of resin, metal, wood, or the like. In addition, if the seat surface forming member 18 has translucency, the luggage storage space 77 can be visually recognized from the seating surface side, and it is preferable because it can suppress misplacement of the luggage. In order to achieve this, the seat surface forming member 18 is made of a mesh-like stretch fabric, a transparent sheet-like stretch fabric, a plate-like member having a large number of through-holes, a transparent or translucent plate-like member, and the like. It is preferable to apply.

  By the way, in another embodiment shown in FIG. 16, the upward U-shaped horizontal beam may be rotatably disposed at the front portion of the support base, or may be rotatably disposed at the front portion of the support base. An embodiment that is not performed is also conceivable. When the cross beam is pivotably arranged at the front part of the support base, various shapes can be considered for the shape of the cross beam, and the flat part formed in the middle does not form a part of the luggage placement surface. In some cases. Further, it is possible to appropriately support the horizontal beam and the support base so as to be rotatable via a locking mechanism or the like.

  Further, the shelf board that forms the luggage placement surface may be a fixed board rather than a detachable type, but in any system, the object to which the shelf board is attached is not limited to the support base but may be a seat or the like. When attaching to the seat, the shelf board is suspended and supported by the seat via an arm-like member or a wall-like member so that a luggage storage space is formed between the lower surface of the seat and the upper surface of the shelf board. In addition, it is conceivable that the load placement surface is constituted by the upper surface of the flat portion of the cross beam and the upper surface of the shelf plate suspended and supported by the seat.

  Although the luggage storage space in the present embodiment is open in the left-right direction and the rear, the open portion may be appropriately closed.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Leg 3 ... Support base 5 ... Seat 5c ... Front edge part 7 ... Backrest 15 ... Seat frame 21 ... Cross beam 21a ... Flat part 21c ... Upper surface 45 ... Mounting wall 75 ... Luggage mounting surface 77 ... Luggage accommodation space B1 ... Luggage M ... Zhangji

Claims (10)

A leg, a support base rotatably supported by the leg, and a seat disposed on the support base; a load placement surface provided below the seat; A swivel chair in which a luggage storage space is formed between the rear surface and a luggage storage space for freely loading and unloading luggage,
The seat is supported by the support base via a transverse beam, and the transverse beam has a U-shape in a front view having a substantially flat flat portion in the middle, and an upper surface of the flat portion is the luggage. A swivel chair characterized in that it forms at least a part of a mounting surface.   2. The swivel chair according to claim 1, wherein the seat is cantilevered only on the front edge portion by the support base via the transverse beam, and the luggage storage space is also opened in the left-right direction and rearward.   The swivel chair according to claim 1 or 2, wherein a backrest is integrated with the seat.   The swivel chair according to claim 1, 2 or 3, wherein the seat comprises a pair of left and right seat frames supported at both ends of the cross beam, and a tension fabric stretched between the two seat frames. .   The swivel chair according to claim 4, wherein the horizontal beam is provided with a pair of mounting walls that are directly or indirectly in close contact with at least inner surfaces of the left and right seat frames at both left and right ends.   The swivel chair according to claim 1, 2, 3, 4, or 5, wherein the load placement surface is constituted by an upper surface of a flat portion of the cross beam and an upper surface of a shelf plate provided on a support base.   The swivel chair according to claim 1, 2, 3, 4, or 5, wherein the load placement surface is constituted by an upper surface of a flat portion of the cross beam and an upper surface of a shelf board suspended and supported by the seat. A backrest separate from the seat is supported on the support base so as to be tiltable,
The swivel chair according to claim 1, further comprising a synchro tilt mechanism for tilting the backrest and the seat in conjunction with each other at a constant ratio.   The synchro tilt mechanism allows the front edge of the seat to be tiltably supported by an upper open U-shaped horizontal beam rotatably disposed on the front portion of the support base, and the rear edge of the seat is The swivel chair according to claim 8, wherein the swivel chair is connected to a back support rod of a backrest. The seat includes a pair of left and right seat frames supported at both ends of the transverse beam, and a seat surface forming member spanned between the two seat frames, and the backrest is the back support. The swivel chair according to claim 9, further comprising a backrest surface forming member supported by the heel.

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