JP3722430B2

JP3722430B2 - Chair device with bed conversion function

Info

Publication number: JP3722430B2
Application number: JP2002101843A
Authority: JP
Inventors: 優鈴木
Original assignee: Paramount Bed Co Ltd
Current assignee: Paramount Bed Co Ltd
Priority date: 2002-04-03
Filing date: 2002-04-03
Publication date: 2005-11-30
Anticipated expiration: 2022-04-03
Also published as: JP2003289989A

Description

【０００１】
【発明の属する技術分野】
本発明は、病室等において、付添人が椅子として勿論、ベッドとしても使えるようにした、ベッド変換機能を備えた椅子装置に関するものである。
【０００２】
【従来の技術】
現在、病室のベッド傍らに配備されている、付添人が使用するための椅子のうち、フレームを変位させて、座面をずらし、背もたれを倒伏してベッドとして使用できるようにした椅子１がある（図９参照）。
かかる椅子１では、椅子として使用する場合、座部２の裏面側に、フレーム３に対し、椅子１前方へずれないようにするためのストッパ４が設けられており、ベッドとして使用する際に、前記座部２前部を持ち上げてストッパ４をフレーム３から外し、座部２椅子前方へ引っ張ることで、背もたれ５を支える背パイプ６が、フレーム３内のガイド手段７と連結した連動リンク８によって、フレーム３との軸止め箇所９を中心に変位して倒伏していき、前記背パイプ６上に、背もたれ５を載せてベッドの形態にもたらすようにしている。
【０００３】
【発明が解決しようとする課題】
このように、前記椅子１では、座部２を持ち上げることで、簡単にベッドの形態にもたらすことができるので、反面、椅子１を運ぶ際、座部２を持ちながら運ぶと、座部２がフレーム３の所定の位置から外れてずれてしまい、背パイプ６が倒れてしまうという不都合があった。
本発明は、かかる不都合を改善するために提案されたものであって、椅子へ、またはベッドへの変換操作性の簡敏さは損なわずに、運ぶ際に、座部を簡単に外れないようにロックできる構成とした、ベッド変換機能を備えた椅子装置を提供することを目的とする。
【０００４】
【課題を解決するための手段】
前記した課題を解決するために、本発明では、請求項１において、脚フレーム上の前部側に、脚フレーム前後方に移動可能に設けた可動座部と、前記脚フレーム上の後部側に、起伏可能に取り付けた背フレームに支持する背部とを備え、前記可動座部と背部とは、可動支持機構により、可動座部を前記脚フレームに沿って前後方に移動させることで前記背フレームを連動させて背部を起伏させる構成とし、前記可動支持機構は、前記背フレーム基端側に末端側を屈曲自在に連結すると共に、先端側を前記可動座部側に上下動可能に保持した操作部材と、前記脚フレーム側に設けて、前記操作部材の先端側を係脱可能に拘束する操作部材受部とを備え、前記背部は、背フレームとは独立して回動可能に前記脚フレーム上の後部側に取り付ける構成としたベッド変換機能を備えた椅子装置を提案する。
また本発明では、請求項２において、前記背フレームは、略コ型形状のパイプ枠で構成し、前記背フレーム両基端側近傍に、末端側を回動自在に取り付けた背ロッドの中間部位に前記背部の裏面部に回動自在に取り付けて前記背部を支持するようにし、前記背ロッドの両端部を前記背フレーム両基端側近傍を介して前記脚フレーム上部の後部側に回動自在に取り付ける構成としたベッド変換機能を備えた椅子装置を提案する。
また本発明では、請求項３において、前記可動座部には、脚フレームに沿って前記可動座部を案内するための座部ガイド部材を可動座部裏面側に設け、この座部ガイド部材に、前記操作部材の先端側を上下動可能に挿通して保持するための遊嵌結合部を設けたベッド変換機能を備えた椅子装置を提案する。
また本発明では、請求項４において、前記操作部材は、棒部材を加工した、一対の連動伝達部と、連動伝達部先端側に取り付けた操作部と、操作部近傍に、連動伝達部に直交するように設けて前記座部ガイド部材に上下動可能に挿通すると共に、前記脚フレーム側の操作部材受部に係止させてなる横軸部とによって構成したベッド変換機能を備えた椅子装置を提案する。
さらに本発明では、請求項５において、前記操作部材受部は、前記操作部材の横軸部を座部ガイド部材の遊嵌結合部に挿通した状態で、前記横軸の両端部を係止させることで可動座部を係脱可能に拘束する、脚フレーム後方側に傾斜して形成した係止溝を備えたベッド変換機能を備えた椅子装置を提案する。
【０００５】
請求項１によれば、操作部材の先端側を操作部材受部から持ち上げると共に、前記可動座部を脚フレーム前方へ引っ張ることで、前記操作部材の先端側が操作部材受部から離脱し、前記可動座部を前記座部ガイド部材を介して脚フレームに沿って脚フレーム前方へ移動させると共に、操作部材を背フレーム基端側との連結箇所を中心に変位させて前記背フレームを連動倒伏させ、背フレームにて支える背部を倒伏させることができる。
【０００６】
請求項２によれば、背部を持ち上げて、脚フレーム上部の後部側に背フレームを介して取り付けた背ロッドを回動させることで、前記背部を可動座部側に隙間なく移動載置することができる。
【０００７】
請求項３によれば、椅子装置を運搬の際に可動座部を持ち上げて、座部ガイド部材の遊嵌結合部が上がっても、操作部材の先端側は操作部材受部に係止したままであるので、可動座部は移動することはなく、椅子装置は椅子状態を維持する。
【０００８】
請求項４によれば、可動座部を持ち上げると共に、操作部材の操作部を持ち上げることで、連動伝達部が変位し、横軸部を脚フレーム側の操作部材受部から離脱させることができ、可動座部を脚フレーム前方側へ移動できるようになる。
【０００９】
請求項５によれば、操作部材の横軸部を、脚フレーム後方側に傾斜して形成した係止溝で、簡単には外れないように保持することができる。
【００１０】
【発明の実施の態様】
以下、本発明にかかるベッド変換機能を備えた椅子装置につき、一つの実施の態様を示し、添付の図面を基に説明する。
図１に、ベッド変換機能を備えた椅子装置１０の一例を示す。
この椅子装置１０は、脚フレーム１１上に可動座部１２を可動支持機構１３を介して脚フレーム１１前後方に移動可能に装着し、前記脚フレーム１１上の後部側に起伏可能に設けた背フレーム１４に背を受ける背部１５を支持する構成としている。
【００１１】
前記脚フレーム１１は、パイプ部材で構成し、一対の前脚部１１ａ，１１ａと、後脚部１１ｂ，１１ｂと、前脚部１１ａ，１１ａと後脚部１１ｂ，１１ｂとを繋ぐ縦梁部１１ｃ，１１ｃとを有している。
前記一対の前脚部１１ａ，１１ａ間の幅方向寸法を、後脚部１１ｂ，１１ｂ間の幅方向寸法に比較して大としている（図２参照）。また後脚部１１ｂ，１１ｂ間の幅寸法と前記縦梁部１１ｃ，１１ｃ間の寸法を等しくしている。
【００１２】
前記可動座部１２は、詳細には説明しないが、例えば合板に詰め物として異なる硬さ、および形態のウレタンフォーム材を積層して、表面をさらにウレタンフォーム材で覆う一方、裏面を不織布で覆って構成している。また、前記背部１５においても同構成としている。
【００１３】
次に前記可動支持機構１３について説明する。すなわち可動支持機構１３は、前記可動座部１２裏面に取り付けた座部ガイド部材１６と、この座部ガイド部材１６と前記背フレーム１４基端側とを、背フレーム１４基端側に末端側を屈曲自在に接続すると共に、先端側を前記座部ガイド部材１６に上下動可能に挿通して連結した操作部材１７とを有し、前記脚フレーム１１に、前記操作部材１７の先端側を係脱可能に支持してなる操作部材受部１８を設けている。
前記座部ガイド部材１６は、両端側に縦梁部１１ｃ，１１ｃに沿って可動座部１２を案内するためのガイド部１６ａ，１６ａと、前記操作部材１７先端側の横軸部（後述）を上下動可能に挿通してなる遊嵌結合部１６ｂ，１６ｂを設けている（図３、図４、図５参照）。
前記操作部材１７は、棒部材を加工し、側面形状への字型の一対の連動伝達部１７ａ，１７ａと、連動伝達部１７ａ，１７ａ先端側に取り付けた操作部１７ｂと、操作部１７ｂ近傍に、連動伝達部１７ａ，１７ａに直交するように設けた横軸部１７ｃとによって構成している。
さらに前記操作部材受部１８には、前記操作部材１７の横軸部１７ｃを座部ガイド部材１６の遊嵌結合部１６ｂ，１６ｂに挿通した状態で、前記横軸１７ｃの両端部を係止させることで可動座部１２を係脱可能に拘束する係止溝１８ａを形成している。この係止溝１８ａは、溝の形成方向を、脚フレーム１１後方側に若干傾斜するようにしている（図５参照）。
【００１４】
そして、前記背フレーム１４は、略コ型形状のパイプ枠で構成し、両基端側に、結合パイプ１９，１９を介し、前記操作部材１７における連動伝達部１７ａ，１７ａ末端側と、屈曲自在に連結している。
また前記略コ型形状の背フレーム１４の内側には、前記背部１５の裏面部の所定の箇所に、中間部位をホルダ部材２０を介して回動自在に取り付けて背部１５を支持し、両端部を前記背フレーム１４基端側の結合パイプ１９，１９近傍に回動自在に挿通した背ロッド２１を設けている。この背ロッド２１の両端部は、前記脚フレーム１１上の後部側に回動自在に取着している。
なお、前記背フレーム１４と操作部材１７とは、操作部材１７の横軸部１７ｃを座部ガイド部材１６の遊嵌結合部１６ｂ，１６ｂに挿通した状態で、前記横軸１７ｃの両端部を操作部材受部１８の係止溝１８ａに係止させた状態では、くの字型に屈曲した状態となっている（図３参照）。
【００１５】
以上のような椅子装置１０において、椅子装置１０の椅子状態からベッド状態に変換するときは、操作部材１７先端側の操作部１７ｂを持ち上げることで、操作部１７ｂ近傍の横軸部１７ｃが、操作部材受部１８の係止溝１８ａから上動し、係止溝１８ａの溝頂部に至る。ここで可動座部１２を脚フレーム１１前方側に引っ張れば、可動座部１２は座部ガイド部材１６ごと操作部材受部１８から外れ、可動座部１２は、座部ガイド部材１６のガイド部１６ａ，１６ａが脚フレーム１１の縦梁部１１ｃ，１１ｃに沿って移動する。
これにより、操作部材１７の連動伝達部１７ａ，１７ａは、背フレーム１４基端側の結合パイプ１９，１９を中心に変位し、背フレーム１４側も倒伏していき、前記操作部材１７の連動伝達部１７ａ，１７ａと背フレーム１４は略直線状態に展開し、背部１５は背フレーム１４に乗った状態で略水平状態に倒伏していく。背フレーム１４に乗って略水平状態に倒伏した状態では、背部１５と可動座部１２とは、間隔が生じた状態となる。
そこで、今度は、前記背部１５を持ち上げて、脚フレーム１１上の後部側に、前記背フレーム１４を介して連結した背ロッド２１の両端部が回動して、前記背部１５を可動座部１２側に隙間なく移動載置することができる（図７、図４、図６参照）。
【００１６】
なお、前記操作部材受部１８の係止溝１８ａは、溝の形成方向を、脚フレーム１１後方側に若干傾斜するようにしているので、椅子装置１を運搬の際に可動座部１２を持ち上げて、座部ガイド部材１６の遊嵌結合部１６ｂが上がっても、操作部材１７の横軸部１７ｃは、係止溝１８ａからは簡単には外れないように保持され、可動座部１２は移動することはなく、椅子装置１は椅子状態を維持する。
【００１７】
一方、ベッド状態から椅子状態に戻すときは、先ず、背部１５側を持ち上げて、背ロッド２１を動かして、前記背部１５を可動座部１２側から離れた位置にもたらし（図８参照）、次いで操作部材１７の操作部１７ｂを持ちながら、前記背フレーム１４を操作部材１７との連結箇所を中心に屈曲させるべく背部１５裏面を傾斜させ、操作部材１７先端側寄りの横軸部１７ｃを、脚フレーム１１の操作部材受部１８の係止溝１８ａに係合させることで操作が完了する（図１，図３参照）。
【００１８】
以上のように、可動座部１２を座部ガイド部材１６ごと脚フレーム１２側の操作部材受部１８から外すには、操作部材１７先端側の操作部１７ｂを持ち上げることで、操作部１７ｂ近傍の横軸部１７ｃを、操作部材受部１８の係止溝１８ａから離脱させて、可動座部１２を脚フレーム１１前方側に引っ張る操作が必要であり、従って椅子装置１０を運搬する際に、可動座部１２を持ち上げただけでは、操作部材１７の横軸部１７ｃは、斜め状に形成された係止溝１８ａからは簡単には外れないように保持され、椅子状態を維持し、取扱い性も向上する。
【００１９】
【発明の効果】
以上の通り、本発明によれば、椅子として使用したり、またベッドとして使用する際、椅子へ、またはベッドへの変換操作性の簡敏さは損なわずに、運ぶ際に、座部を簡単に外れないようにロックできる構成としたので、取扱い性が一段と向上し、使い勝手に優れる椅子装置ということができる。
【００２０】
【図面の簡単な説明】
【図１】本発明にかかるベッド変換機能を備えた椅子装置の一実施例を示す外観斜視図である。
【図２】図１に示す椅子装置の背面図である。
【図３】図１に示す椅子装置の椅子状態における縦断面図である。
【図４】図１に示す椅子装置のベッド状態における縦断面図である。
【図５】図１に示す椅子装置のフレーム構成および可動支持機構の構成を示した平面図である。
【図６】図１に示す椅子装置のベッド状態における底面方向からの図である。
【図７】本発明にかかるベッド変換機能を備えた椅子装置の作用説明図である。
【図８】本発明にかかるベッド変換機能を備えた椅子装置の作用説明図である。
【図９】従来の椅子装置の一例を示した側面図である。
【符号の説明】
１椅子
２座部
３フレーム
４ストッパ
５背もたれ
６背パイプ
７ガイド手段
８連動リンク
９軸止め箇所
１０椅子装置
１１脚フレーム
１１ａ前脚部
１１ｂ後脚部
１１ｃ縦梁部
１２可動座部
１３可動支持機構
１４背フレーム
１５背部
１６座部ガイド部材
１６ａガイド部
１６ｂ遊嵌結合部
１７操作部材
１７ａ連動伝達部
１７ｂ操作部
１７ｃ横軸部
１８操作部材受部
１８ａ係止溝
１９結合パイプ
２０ホルダ部材
２１背ロッド[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair device having a bed conversion function that can be used not only as a chair but also as a bed in a hospital room or the like.
[0002]
[Prior art]
Currently, there is a chair 1 that is deployed near the bed in a hospital room and that can be used as a bed by shifting the frame, shifting the seating surface, and lying down on the backrest. (See FIG. 9).
In such a chair 1, when used as a chair, a stopper 4 is provided on the back surface side of the seat portion 2 so as not to be displaced forward of the chair 1 with respect to the frame 3. By lifting the front part of the seat 2 and removing the stopper 4 from the frame 3 and pulling the seat 2 forward, the back pipe 6 that supports the backrest 5 is connected to the guide means 7 in the frame 3 by an interlocking link 8. The body 3 is displaced about the shaft stop 9 with the frame 3 and lies down, and the backrest 5 is placed on the back pipe 6 to bring it into the form of a bed.
[0003]
[Problems to be solved by the invention]
Thus, in the chair 1, the seat 2 can be easily brought into the form of a bed by lifting the seat 2. On the other hand, when the chair 1 is carried while holding the seat 2, the seat 2 is There is a problem that the frame 3 is displaced from a predetermined position and is displaced and the back pipe 6 falls down.
The present invention has been proposed to remedy such inconveniences, and does not easily remove the seat during transportation without impairing the operability of conversion to a chair or bed. An object of the present invention is to provide a chair device having a bed conversion function, which can be locked to the bed.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problem, in the present invention, in claim 1, a movable seat portion provided on the front side of the leg frame so as to be movable forward and rearward of the leg frame, and a rear side of the leg frame. A back portion that is supported by a back frame that can be raised and lowered, and the movable seat portion and the back portion are moved back and forth along the leg frame by a movable support mechanism. The movable support mechanism is configured such that the distal side is flexibly connected to the back frame base end side and the distal end side is held to be movable up and down on the movable seat portion side. A member and an operation member receiving portion that is provided on the leg frame side and removably restrains the distal end side of the operation member, and the back portion is rotatable independently of the back frame. The structure to be attached to the upper rear side To propose a chair apparatus equipped with a bed conversion function was.
Further, in the present invention, in claim 2, the back frame is formed by a substantially U-shaped pipe frame, and an intermediate portion of a back rod that is pivotally attached to both proximal end sides of the back frame. The back rod is pivotally attached to the back surface of the back so as to support the back, and both ends of the back rod can be pivoted to the rear side of the upper part of the leg frame through the vicinity of the back frame both ends. We propose a chair device equipped with a bed conversion function that is attached to the chair .
According to the present invention, in the third aspect of the present invention, the movable seat portion is provided with a seat guide member for guiding the movable seat portion along the leg frame on the back side of the movable seat portion. The chair apparatus provided with the bed conversion function which provided the loose-fitting joint part for penetrating and holding | maintaining the front end side of the said operation member so that a vertical movement is possible is proposed .
Also, in the present invention, in claim 4, the operation member is a pair of interlocking transmission parts obtained by processing a bar member, an operation part attached to the distal end side of the interlocking transmission part, and in the vicinity of the operation part, orthogonal to the interlocking transmission part. A chair device provided with a bed conversion function configured to be inserted into the seat guide member so as to be movable up and down and a horizontal shaft portion that is locked to the operation member receiving portion on the leg frame side. Suggest .
Furthermore, in this invention, in Claim 5, the said operation member receiving part latches the both ends of the said horizontal axis in the state which penetrated the horizontal axis part of the said operation member to the loose fitting coupling part of a seat part guide member. The chair apparatus provided with the bed conversion function provided with the latching groove | channel formed inclining in the leg frame back side which restrains a movable seat part so that engagement / disengagement is possible is proposed .
[0005]
According to the first aspect, the front end side of the operation member is lifted from the operation member receiving portion , and the movable seat portion is pulled forward of the leg frame, so that the front end side of the operation member is detached from the operation member receiving portion and the movable member is moved. The seat part is moved forward along the leg frame through the seat part guide member, and the operation member is displaced centering on the connection point with the back frame base end side, and the back frame is interlocked and laid down, The back supported by the back frame can be laid down.
[0006]
According to claim 2, the back part is lifted and the back rod attached to the rear side of the upper part of the leg frame via the back frame is rotated, so that the back part is moved and placed on the movable seat part side without any gap. Can do.
[0007]
According to the third aspect, even when the movable seat portion is lifted when the chair device is transported and the loose coupling portion of the seat portion guide member is raised, the distal end side of the operation member remains locked to the operation member receiving portion. Therefore, the movable seat portion does not move, and the chair device maintains the chair state.
[0008]
According to claim 4, by lifting the movable seat part and lifting the operation part of the operation member, the interlocking transmission part is displaced, and the horizontal shaft part can be detached from the operation member receiving part on the leg frame side, The movable seat can be moved to the front side of the leg frame.
[0009]
According to the fifth aspect, the horizontal shaft portion of the operation member can be held by the locking groove formed so as to be inclined to the rear side of the leg frame so as not to be easily detached.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, a chair apparatus having a bed conversion function according to the present invention will be described with reference to one embodiment and with reference to the accompanying drawings.
FIG. 1 shows an example of a chair device 10 having a bed conversion function.
The chair device 10 has a movable seat portion 12 mounted on a leg frame 11 via a movable support mechanism 13 so that the movable seat portion 12 can be moved forward and backward, and a back provided on the rear side of the leg frame 11 so as to be raised and lowered. The back portion 15 that receives the back from the frame 14 is supported.
[0011]
The leg frame 11 is constituted by a pipe member, and longitudinal beam portions 11c and 11c connecting the pair of front leg portions 11a and 11a, the rear leg portions 11b and 11b, and the front leg portions 11a and 11a and the rear leg portions 11b and 11b. And have.
The width-direction dimension between the pair of front leg portions 11a, 11a is larger than the width-direction dimension between the rear leg portions 11b, 11b (see FIG. 2). Further, the width dimension between the rear leg portions 11b and 11b and the dimension between the longitudinal beam portions 11c and 11c are made equal.
[0012]
Although the movable seat 12 is not described in detail, for example, a polyurethane foam material having different hardness and form as stuffing is laminated on a plywood, and the surface is further covered with a urethane foam material, while the back surface is covered with a nonwoven fabric. It is composed. The back portion 15 has the same configuration.
[0013]
Next, the movable support mechanism 13 will be described. That is, the movable support mechanism 13 is configured such that the seat guide member 16 attached to the back surface of the movable seat 12, the seat guide member 16 and the back frame 14 base end side, and the back frame 14 base end side end side. The operation member 17 is connected to bend freely and is inserted and connected to the seat guide member 16 so as to move up and down. The operation member 17 is engaged with and disengaged from the leg frame 11. An operation member receiving portion 18 that is supported is provided.
The seat guide member 16 includes guide portions 16a and 16a for guiding the movable seat portion 12 along the longitudinal beam portions 11c and 11c on both ends, and a horizontal shaft portion (described later) on the distal end side of the operation member 17. Free fitting coupling portions 16b, 16b that are inserted so as to be vertically movable are provided (see FIGS. 3, 4, and 5).
The operation member 17 is formed by processing a bar member, a pair of interlocking transmission parts 17a and 17a having a side shape, an operation part 17b attached to the distal end side of the interlocking transmission parts 17a and 17a, and in the vicinity of the operation part 17b. The horizontal transmission part 17c provided so as to be orthogonal to the interlocking transmission parts 17a and 17a.
Further, the operation member receiving portion 18 is engaged with both end portions of the horizontal shaft 17c in a state where the horizontal shaft portion 17c of the operation member 17 is inserted into the loose fitting coupling portions 16b and 16b of the seat guide member 16. Thus, a locking groove 18a for restraining the movable seat portion 12 so as to be detachable is formed. The locking groove 18a is inclined slightly toward the rear side of the leg frame 11 (see FIG. 5).
[0014]
The back frame 14 is formed of a substantially U-shaped pipe frame, and is bent to the distal end side of the interlocking transmission portions 17a and 17a of the operation member 17 via coupling pipes 19 and 19 on both base end sides. It is linked to.
Further, on the inner side of the substantially U-shaped back frame 14, an intermediate part is rotatably attached via a holder member 20 to a predetermined portion of the back surface portion of the back portion 15 to support the back portion 15. Is provided in the vicinity of the coupling pipes 19, 19 on the base end side of the back frame 14 so as to be rotatable. Both ends of the back rod 21 are pivotally attached to the rear side on the leg frame 11.
The back frame 14 and the operating member 17 operate both ends of the horizontal shaft 17c in a state where the horizontal shaft portion 17c of the operating member 17 is inserted into the loose fitting coupling portions 16b and 16b of the seat guide member 16. In the state of being locked in the locking groove 18a of the member receiving portion 18, it is bent into a dogleg shape (see FIG. 3).
[0015]
In the chair device 10 as described above, when the chair device 10 is converted from the chair state to the bed state, the operation portion 17b on the distal end side of the operation member 17 is lifted so that the horizontal shaft portion 17c near the operation portion 17b is operated. It moves upward from the locking groove 18a of the member receiving portion 18 and reaches the groove top of the locking groove 18a. If the movable seat portion 12 is pulled to the front side of the leg frame 11, the movable seat portion 12 is detached from the operation member receiving portion 18 together with the seat portion guide member 16, and the movable seat portion 12 is guided by the guide portion 16 a of the seat portion guide member 16. , 16a move along the longitudinal beam portions 11c, 11c of the leg frame 11.
As a result, the interlocking transmission portions 17a and 17a of the operation member 17 are displaced about the coupling pipes 19 and 19 on the base end side of the back frame 14 and the back frame 14 side also falls down, and the interlock transmission of the operation member 17 is performed. The portions 17a, 17a and the back frame 14 are developed in a substantially straight state, and the back portion 15 is laid down in a substantially horizontal state while being on the back frame 14. In a state of riding on the back frame 14 and lying down in a substantially horizontal state, the back portion 15 and the movable seat portion 12 are in a state where an interval is generated.
Therefore, this time, the back portion 15 is lifted, and both ends of the back rod 21 connected via the back frame 14 are rotated to the rear side on the leg frame 11 so that the back portion 15 is moved to the movable seat portion 12. It can be moved and placed on the side without any gap (see FIGS. 7, 4, and 6).
[0016]
Since the locking groove 18a of the operation member receiving portion 18 is slightly inclined toward the rear side of the leg frame 11, the movable seat portion 12 is lifted when the chair device 1 is transported. Thus, even if the loose coupling portion 16b of the seat guide member 16 is raised, the horizontal shaft portion 17c of the operation member 17 is held so as not to be easily detached from the locking groove 18a, and the movable seat portion 12 moves. The chair device 1 maintains the chair state.
[0017]
On the other hand, when returning from the bed state to the chair state, the back portion 15 side is first lifted and the back rod 21 is moved to bring the back portion 15 away from the movable seat portion 12 side (see FIG. 8). While holding the operation portion 17b of the operation member 17, the back surface of the back portion 15 is inclined so that the back frame 14 bends around the connection point with the operation member 17, and the horizontal shaft portion 17c near the distal end side of the operation member 17 is The operation is completed by engaging with the locking groove 18a of the operation member receiving portion 18 of the frame 11 (see FIGS. 1 and 3).
[0018]
As described above, in order to remove the movable seat portion 12 together with the seat portion guide member 16 from the operation member receiving portion 18 on the leg frame 12 side, the operation portion 17b on the distal end side of the operation member 17 is lifted, and the vicinity of the operation portion 17b. The operation of pulling the movable seat 12 to the front side of the leg frame 11 by detaching the horizontal shaft portion 17c from the locking groove 18a of the operation member receiving portion 18 is necessary. The horizontal shaft portion 17c of the operation member 17 is held so as not to be easily detached from the diagonally formed locking groove 18a only by lifting the seat portion 12, and the chair state is maintained and the handling property is also improved. improves.
[0019]
【The invention's effect】
As described above, according to the present invention, when used as a chair or as a bed, the seat portion can be easily moved to the chair or to the bed without impairing the ease of conversion operability. Since it can be locked so that it does not come off, it can be said that it is a chair device that is further improved in handling and excellent in usability.
[0020]
[Brief description of the drawings]
FIG. 1 is an external perspective view showing an embodiment of a chair device having a bed conversion function according to the present invention.
FIG. 2 is a rear view of the chair device shown in FIG.
FIG. 3 is a longitudinal sectional view of the chair device shown in FIG. 1 in a chair state.
4 is a longitudinal sectional view of the chair device shown in FIG. 1 in a bed state.
5 is a plan view showing a frame configuration and a movable support mechanism of the chair device shown in FIG. 1; FIG.
6 is a view from the bottom direction in the bed state of the chair device shown in FIG. 1. FIG.
FIG. 7 is an operation explanatory view of a chair device having a bed conversion function according to the present invention.
FIG. 8 is an operation explanatory diagram of a chair device having a bed conversion function according to the present invention.
FIG. 9 is a side view showing an example of a conventional chair device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Chair 2 Seat part 3 Frame 4 Stopper 5 Backrest 6 Back pipe 7 Guide means 8 Interlocking link 9 Shaft stop 10 Chair apparatus 11 Leg frame 11a Front leg part 11b Rear leg part 11c Vertical beam part 12 Movable seat part 13 Movable support mechanism 14 Back frame 15 Back portion 16 Seat portion guide member 16a Guide portion 16b Free fitting coupling portion 17 Operation member 17a Interlocking transmission portion 17b Operation portion 17c Horizontal shaft portion 18 Operation member receiving portion 18a Locking groove 19 Binding pipe 20 Holder member 21 Back rod

Claims

A movable seat provided on the front side of the leg frame so as to be movable forward and rearward of the leg frame; and a back part supported on a back frame attached in a undulating manner on the rear side of the leg frame. the seat and the back, the movable supporting mechanism, and configured to undulating back the in conjunction with the back frame by moving toward back and forth along the movable seat to the leg frame, the movable support mechanism, the A distal end side of the back frame is connected to the proximal end side of the back frame so as to be bendable, an operation member holding the distal end side of the movable seat portion so as to be movable up and down, a leg frame side, and a distal end side of the operation member. A bed conversion function characterized in that it comprises an operation member receiving portion that is releasably restrained, and the back portion is configured to be attached to the rear side on the leg frame so as to be rotatable independently of the back frame. Equipped chair device.

The back frame is configured by a substantially U-shaped pipe frame, and can be freely rotated on the back surface of the back portion at an intermediate portion of a back rod that is pivotally attached to the proximal end sides of the back frame. The back rod is attached to the rear frame, and both ends of the back rod are rotatably attached to the rear side of the upper portion of the leg frame through the vicinity of the back frame both proximal ends. The chair apparatus provided with the bed conversion function of Claim 1.

The movable seat portion is provided with a seat guide member for guiding the movable seat portion along the leg frame on the back side of the movable seat portion, and the front end side of the operation member is moved up and down on the seat guide member. The chair apparatus provided with the bed conversion function according to claim 1, further comprising a loosely-fitting coupling portion that is inserted and held in a possible manner.

The operation member includes a pair of interlocking transmission parts obtained by processing a bar member, an operation part attached to the distal end side of the interlocking transmission part, and provided in the vicinity of the operation part so as to be orthogonal to the interlocking transmission part. 4. A chair provided with a bed conversion function according to claim 1, wherein the chair is configured to be inserted in a vertically movable manner and to have a horizontal shaft portion engaged with an operation member receiving portion on the leg frame side. apparatus.

The operation member receiving portion can engage and disengage the movable seat portion by locking both end portions of the horizontal shaft in a state where the horizontal shaft portion of the operation member is inserted into the loose coupling portion of the seat guide member. The chair device provided with a bed conversion function according to claim 4, further comprising a locking groove that is inclined and formed on the rear side of the leg frame.