JP2009240583A - Back/knee bottom interlocking mechanism - Google Patents

Back/knee bottom interlocking mechanism Download PDF

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JP2009240583A
JP2009240583A JP2008091608A JP2008091608A JP2009240583A JP 2009240583 A JP2009240583 A JP 2009240583A JP 2008091608 A JP2008091608 A JP 2008091608A JP 2008091608 A JP2008091608 A JP 2008091608A JP 2009240583 A JP2009240583 A JP 2009240583A
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interlocking
knee bottom
arm
knee
bottom side
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JP5024887B2 (en
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Tatsuya Shimada
竜也 嶋田
Toru Takada
徹 高田
Atsushi Tomikawa
淳 冨川
Otoko Kageyama
男 影山
Yuri Sasaki
由理 佐々木
Katsuyoshi Nomura
克芳 野村
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Paramount Bed Co Ltd
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Paramount Bed Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that elements of a mechanism occupy a large space in the conventional back/knee bottom interlocking mechanism and the conventional operation mechanism for selectively releasing the interlock uses a spring and the like and requires the large number of components. <P>SOLUTION: A bed is provided with pushing-up arms 6a and 6b and interlocking arms 7a and 7b at drive shafts 5a and 5b rotatingly driving a back bottom 2 and a knee bottom 3 respectively, an interlocking link 8 is connected between the interlocking arms, and the knee bottom is rotatingly driven by being operatively connected to the knee joints. The pushing-up arms of the back bottom side and the knee bottom side are disposed to rotatingly driven in the same direction of the respective bottoms, the interlocking arm in the back bottom side is projected upward with respective to the driving shaft, the interlocking arm in the knee bottom side is projected downward with respective to the driving shaft, the knee bottom-side end of the interlocking link has a connection slit 9 in its longitudinal direction to movably engage the interlocking shaft 10 provided at the interlocking arm of the knee bottom side, and the interlocking link operatively constitutes the moving prevention member 11 engaged with the interlocking shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は，ベッドにおける背膝ボトム連動機構に関するものである。   The present invention relates to a back knee bottom interlocking mechanism in a bed.

現在，医療用や家庭用のベッドとしては，背ボトムや膝ボトムを回動させて起伏可能とすることにより，ボトム上の使用者を，場合に応じて好適な姿勢で支持するように構成したものが幅広く使用されている。   Currently, beds for medical and home use are configured to support users on the bottom in a suitable posture by turning the back bottom and knee bottom so that they can be raised and lowered. Things are widely used.

例えば特許文献１には背ボトムや膝ボトムを連動させる機構が記載されている。これを図１０、図１１を参照して説明すると、この連動機構は、床支持フレーム１０１に支持された背ボトム１０２を回転駆動する駆動軸１０５ａと膝ボトム１０３を回転駆動する駆動軸１０５ｂの夫々に押上腕１０６ａ，１０６ｂと連動腕１０７ａ，１０７ｂを設けると共に，それらの連動腕１０７ａ，１０７ｂ間に連動リンク１０８を連結したものである。符号１０４は膝ボトム１０３の端部に連結した足ボトムである。   For example, Patent Document 1 describes a mechanism for interlocking a back bottom and a knee bottom. This will be described with reference to FIG. 10 and FIG. 11. This interlocking mechanism includes a drive shaft 105 a that rotationally drives the back bottom 102 supported by the floor support frame 101 and a drive shaft 105 b that rotationally drives the knee bottom 103. Are provided with push-up arms 106a and 106b and interlocking arms 107a and 107b, and an interlocking link 108 is connected between the interlocking arms 107a and 107b. Reference numeral 104 denotes a foot bottom connected to the end of the knee bottom 103.

この機構において、背ボトム１０２側の押上腕１０６ａは背ボトム１０２と同方向に回転駆動する配置としているが、膝ボトム１０３の押上腕１０６ｂは膝ボトム１０３と逆方向に回転駆動する配置としており、連動腕１０７ａ，１０７ｂはいずれも駆動軸１０５ａ，１０５ｂの下側に構成している。   In this mechanism, the push-up arm 106a on the back bottom 102 side is arranged to rotate in the same direction as the back bottom 102, but the push-up arm 106b of the knee bottom 103 is arranged to rotate in the opposite direction to the knee bottom 103. The interlocking arms 107a and 107b are both configured below the drive shafts 105a and 105b.

以上の構成においては、押上腕１０６ａにより背ボトム１０２を回動上昇させると、連動腕１０７ａにより連動リンク１０８が引っ張られ、駆動軸１０５ｂが駆動軸１０５ａと同方向に回動することにより、押上腕１０６ｂが回動上昇し、こうして図１１に示されるように膝ボトム１０３が背ボトム１０２の回動上昇に連動して回動上昇する。   In the above configuration, when the back bottom 102 is rotated and raised by the push-up arm 106a, the interlock link 108 is pulled by the interlock arm 107a, and the drive shaft 105b rotates in the same direction as the drive shaft 105a. As shown in FIG. 11, the knee bottom 103 rotates and rises in conjunction with the rotation of the back bottom 102.

尚、従来技術として、以上のような背ボトムと膝ボトムの連動をばね等を用いた操作機構により選択的に解除可能な機構も提案されている。
特開２００４−１６６３５号公報 As a conventional technique, a mechanism that can selectively release the interlock between the back bottom and the knee bottom as described above by an operation mechanism using a spring or the like has been proposed.
JP 2004-16635 A

以上の構成において，膝ボトム側の押上腕は，背ボトムとは逆に、膝ボトムの回動と逆方向に回転駆動するように駆動軸の上方に突設しているため、膝ボトムを回転駆動するための部材は，押上腕を突設している駆動軸が最もベッドの足側に位置し，押上腕は，それよりも頭側に位置するので，背ボトムと膝ボトムを連動させるための機構が大きなスペースを占有してしまっている。   In the above configuration, the push-up arm on the knee bottom side protrudes above the drive shaft so as to be driven to rotate in the direction opposite to the rotation of the knee bottom, contrary to the back bottom. To drive, the drive shaft on which the push-up arm protrudes is located closest to the foot side of the bed, and the push-up arm is located on the head side of the bed. The mechanism has occupied a large space.

また背ボトムと膝ボトムの連動を選択的に解除可能な従来の操作機構では、ばね等の部品を用いているので、部品点数が多いという課題があった。
本発明は，以上の課題を解決することを目的とするものである。 Further, in the conventional operation mechanism that can selectively release the interlock between the back bottom and the knee bottom, there is a problem that the number of parts is large because parts such as a spring are used.
The present invention aims to solve the above problems.

上述した課題を解決するために，本発明では，背ボトムを回転駆動する駆動軸と膝ボトムを回転駆動する駆動軸の夫々に押上腕と連動腕を設けると共に，それらの連動腕間に連動リンクを連結して，背ボトムの回転駆動に連動して膝ボトムを回転駆動可能に構成したベッドにおいて，背ボトム側と膝ボトム側の夫々の押上腕は，夫々のボトムと同方向に回転駆動する配置とし，背ボトム側の連動腕は駆動軸に対して上方側に突設すると共に，膝ボトム側の連動腕は駆動軸に対して下方側に突設し，連動リンクの膝ボトム側端部には，その長さ方向に連結スリットを設けて膝ボトム側の連動腕に設けた連動軸を移動可能に係合すると共に，連動リンクには，連動軸に係合する移動阻止部材を操作可能に構成した背膝ボトム連動機構を提案する。   In order to solve the above-described problems, in the present invention, a push-up arm and an interlocking arm are provided on each of a drive shaft that rotationally drives the back bottom and a drive shaft that rotationally drives the knee bottom, and an interlocking link is provided between these interlocking arms. In a bed that is configured so that the knee bottom can be rotated in conjunction with the rotation of the back bottom, the push-up arms on the back bottom side and the knee bottom side rotate in the same direction as the bottom. The interlock arm on the back bottom side protrudes upward with respect to the drive shaft, and the interlock arm on the knee bottom side protrudes downward with respect to the drive shaft. Is provided with a connecting slit in its length direction so that the interlocking shaft provided on the interlocking arm on the knee bottom side can be movably engaged, and the interlocking link can be operated with a movement blocking member engaging with the interlocking shaft. We propose a back-knee bottom interlocking mechanism.

また本発明では，上記の構成において，移動阻止部材は，前側に係合凹部を設けた回動片とし，自重により移動阻止位置まで回動し，操作部材により移動阻止位置から離す構成とした背膝ボトム連動機構を提案する。   According to the present invention, in the above configuration, the movement preventing member is a rotating piece provided with an engagement recess on the front side, and is rotated to the movement preventing position by its own weight and separated from the movement preventing position by the operation member. A knee bottom interlocking mechanism is proposed.

本発明の背膝ボトム連動機構では，背ボトム側と膝ボトム側の夫々の押上腕は，夫々のボトムと同方向に回転駆動する配置とし，背ボトム側の連動腕は駆動軸に対して上方側に突設すると共に，膝ボトム側の連動腕は駆動軸に対して下方側に突設した構成であるので，背ボトムの回動上昇に伴って連動リンクが膝ボトム方向に移動して駆動軸を回転し，押上腕により膝ボトムを回動上昇する。   In the back knee bottom interlocking mechanism of the present invention, the push-up arms on the back bottom side and the knee bottom side are arranged to rotate and drive in the same direction as the respective bottoms, and the interlock arm on the back bottom side is located above the drive shaft. Since the interlocking arm on the knee bottom side protrudes downward with respect to the drive shaft, the interlocking link moves in the direction of the knee bottom as the back bottom rotates and drives. The shaft is rotated, and the knee bottom is rotated up by the push-up arm.

膝ボトム側の押上腕は，背ボトムと同様にボトムと同方向に回転駆動するように駆動軸の上方に突設しており，また連動腕は駆動軸の下方に突設しているため，膝ボトムを回転駆動するための部材は，押上腕が最もベッドの足側に位置し，駆動軸や連動腕は，それよりも頭側に位置するので，背ボトムと膝ボトムを連動させるための機構を省スペースで構成することができる。   The push-up arm on the knee bottom side protrudes above the drive shaft so as to rotate and rotate in the same direction as the back bottom, and the interlocking arm protrudes below the drive shaft. As for the member for rotationally driving the knee bottom, the push-up arm is positioned closest to the foot of the bed, and the drive shaft and interlocking arm are positioned closer to the head. The mechanism can be configured in a space-saving manner.

また本発明の背膝ボトム連動機構において，連動リンクの膝ボトム側端部には，その長さ方向に連結スリットを設けて膝ボトム側の連動腕に設けた連動軸を移動可能に係合すると共に，連動リンクには，連動軸に係合する移動阻止部材を操作可能に構成しているため，移動阻止部材を操作して連動軸を連結スリットに対して移動不能とすることにより上述した背ボトムと膝ボトムの連動を行えると共に，移動阻止部材を操作して連動軸を連結スリットに対して移動可能とすることにより，膝ボトムを背ボトムと連動させないように動作させることができる。   Further, in the back knee bottom interlocking mechanism of the present invention, the interlocking link provided on the interlocking arm on the knee bottom side is movably engaged at the knee bottom side end portion of the interlocking link by providing a connecting slit in the length direction thereof. At the same time, the interlocking link is configured so that the movement preventing member engaged with the interlocking shaft can be operated. The bottom and knee bottom can be interlocked, and the knee bottom can be operated so as not to be interlocked with the back bottom by operating the movement preventing member and allowing the interlocking shaft to move with respect to the connecting slit.

移動阻止部材としては，その自重により移動阻止状態に移行することができるようにすることにより，ばね等の部品が不要となって部品点数を削減することができる。   By allowing the movement preventing member to shift to the movement preventing state by its own weight, parts such as a spring are not required and the number of parts can be reduced.

次に本発明の背膝ボトム連動機構の実施の形態を図１〜図９を参照して説明する。
図において，符号１はベッドフレームであり，このベッドフレーム１に背ボトム２と膝ボトム３を回動昇降可能に支持している。また膝ボトム３の端部には足ボトム４を連結している。符号５ａ，５ｂは，夫々背ボトム２と膝ボトム３の駆動軸を示すもので，背ボトム２を回転駆動する駆動軸５ａと膝ボトム３を回転駆動する駆動軸５ｂの夫々に押上腕６ａ，６ｂと連動腕７ａ，７ｂを設けている。そして，背ボトム２側と膝ボトム３側の夫々の押上腕６ａ，６ｂは，夫々のボトム２、３と同方向に回転駆動する配置としている。また背ボトム２側の連動腕７ａは駆動軸５ａに対して、押上腕６ａと同様に上方側に突設すると共に，膝ボトム３側の連動腕７ｂは駆動軸５ｂに対して、押上腕６ｂとは逆に下方側に突設している。そしてこれらの連動腕７ａ，７ｂ間に連動リンク８を連結している。 Next, an embodiment of the back knee bottom interlocking mechanism of the present invention will be described with reference to FIGS.
In the figure, reference numeral 1 denotes a bed frame, and a back bottom 2 and a knee bottom 3 are supported on the bed frame 1 so as to be capable of rotating up and down. A foot bottom 4 is connected to the end of the knee bottom 3. Reference numerals 5a and 5b denote drive shafts for the back bottom 2 and the knee bottom 3, respectively. The drive shaft 5a for rotationally driving the back bottom 2 and the drive shaft 5b for rotationally driving the knee bottom 3 are respectively connected to the push-up arms 6a and 5b. 6b and interlocking arms 7a and 7b are provided. The push-up arms 6a and 6b on the back bottom 2 side and the knee bottom 3 side are arranged to rotate in the same direction as the bottoms 2 and 3, respectively. The interlocking arm 7a on the back bottom 2 side protrudes upward with respect to the drive shaft 5a in the same manner as the push-up arm 6a, and the interlocking arm 7b on the knee bottom 3 side protrudes with respect to the drive shaft 5b. On the contrary, it protrudes downward. An interlocking link 8 is connected between these interlocking arms 7a and 7b.

連動リンク８の背ボトム２側端部は連動腕７ａに回動可能に連結している。一方、連動リンク８の膝ボトム３側端部には，その長さ方向に連結スリット９を設けて、膝ボトム３側の連動腕７ｂに設けた連結軸１０を移動可能に係合すると共に，連動リンク８には，連結軸１０に係合する移動阻止部材１１を操作可能に構成している。   The end of the interlocking link 8 on the back bottom 2 side is rotatably connected to the interlocking arm 7a. On the other hand, at the knee bottom 3 side end of the interlocking link 8, a connecting slit 9 is provided in its length direction, and the connecting shaft 10 provided on the interlocking arm 7b on the knee bottom 3 side is movably engaged, The interlocking link 8 is configured such that a movement blocking member 11 that engages with the connecting shaft 10 can be operated.

移動阻止部材１１の実施の形態の詳細を説明すると、この移動阻止部材１１は、前側に係合凹部１２を設けた回動片として構成しており，自重により移動阻止位置まで回動し，操作部材１３により移動阻止位置から離す構成としている。この実施の形態においては、連動リンク８の少なくとも膝ボトム３側の端部は、上方に開口を向けた溝形形状に構成しており、移動阻止部材１１は、溝形形状の溝内に自重により回動下降して連結軸１０との係合位置にもたらされるように構成されている。そして移動阻止部材１１を係合位置から外す操作は棒状の操作部材１３によって可能であり、係合位置から外した位置において安定的に支持するための係合凹部１４を連動リンク８に設けている。   The details of the embodiment of the movement blocking member 11 will be described. The movement blocking member 11 is configured as a rotating piece provided with an engaging recess 12 on the front side, and is rotated to the movement blocking position by its own weight. The member 13 is separated from the movement prevention position. In this embodiment, at least the end portion on the knee bottom 3 side of the interlocking link 8 is configured in a groove shape with the opening facing upward, and the movement blocking member 11 has its own weight in the groove shape groove. Thus, it is configured so as to be pivoted and lowered to be brought into the engagement position with the connecting shaft 10. The operation for removing the movement blocking member 11 from the engagement position can be performed by the rod-like operation member 13, and the engagement recess 14 is provided in the interlocking link 8 for stable support at the position removed from the engagement position. .

尚、符号１５は背ボトム２側の駆動軸５ａを回動駆動するための駆動腕であり、この駆動腕１５には図示を省略している直動アクチュエータを伸長駆動又は短縮駆動式に連結するものである。また符号１６は膝ボトム３側の押上腕６ｂの端部に構成したローラーである。   Reference numeral 15 denotes a drive arm for rotationally driving the drive shaft 5a on the back bottom 2 side, and a linear motion actuator (not shown) is connected to the drive arm 15 in an extension drive or contraction drive manner. Is. Reference numeral 16 denotes a roller configured at the end of the push-up arm 6b on the knee bottom 3 side.

以上の構成において、ボトムが水平な状態に対応する図３の状態において、操作部材１３により、移動阻止部材１１を時計回りに回動して自重により落下させた状態、即ち、図１、図２、図３、図６、図８に示す状態では、これらの図に示すように、移動阻止部材１１の先端の係合凹部１２が、連動腕７ｂの連結軸１０の前方、即ち、図中左側に位置している。   In the above configuration, in the state of FIG. 3 corresponding to the state where the bottom is horizontal, the operation preventing member 11 is rotated clockwise by the operation member 13 and dropped by its own weight, that is, FIGS. 3, 6, and 8, as shown in these drawings, the engagement recess 12 at the tip of the movement preventing member 11 is in front of the connecting shaft 10 of the interlocking arm 7 b, that is, the left side in the drawing. Is located.

そこで、図３の状態において、駆動腕１５により駆動軸５ａを図中時計回りに回動すると、押上腕６ａが同方向に回動して図１に示すように背ボトム２を傾斜状態に回動上昇する。この際、駆動軸５ａに対して上方側に突設した連動腕７ａは、その回動により連動リンク８を押動、即ち、図中右方向に移動する。   Therefore, in the state of FIG. 3, when the drive shaft 5a is rotated clockwise in the drawing by the drive arm 15, the push-up arm 6a is rotated in the same direction to rotate the back bottom 2 in an inclined state as shown in FIG. Move up. At this time, the interlocking arm 7a protruding upward with respect to the drive shaft 5a pushes the interlocking link 8 by its rotation, that is, moves in the right direction in the figure.

連動腕７ｂの連結軸１０は連動リンク８の連結スリット９に沿って移動可能であるが、連結軸１０の左側には移動阻止部材１１の係合凹部１２が位置しているので、連結軸１０は移動阻止部材１１によって押動されて、従って駆動軸５ｂは図中反時計回りに回動する。そして駆動軸５ｂにより押上腕６ｂが反時計回りに回動して、膝ボトム３を同様に反時計回りに回動させて上昇させ、図１、図２の状態に至る。   The connecting shaft 10 of the interlocking arm 7b can move along the connecting slit 9 of the interlocking link 8. However, since the engaging recess 12 of the movement blocking member 11 is located on the left side of the connecting shaft 10, the connecting shaft 10 Is pushed by the movement preventing member 11, so that the drive shaft 5b rotates counterclockwise in the drawing. Then, the push-up arm 6b is rotated counterclockwise by the drive shaft 5b, and the knee bottom 3 is similarly rotated counterclockwise to be raised, and the state shown in FIGS. 1 and 2 is reached.

上述と逆に図１、図２の状態において駆動軸５ａを図中反時計回りに回動すると、上述と逆の経過を辿って背ボトム２と膝ボトム３を連動して下降することができる。   1 and 2, when the drive shaft 5a is rotated counterclockwise in the drawing, the back bottom 2 and the knee bottom 3 can be interlocked and lowered following the reverse of the above. .

次にボトムが水平な状態に対応する図３の状態において、操作部材１３により、移動阻止部材１１を反時計回りに回動して、自重により落下させた状態から図４、図５、図７、図９に示すように係合凹部１４に係合させた状態においては、連動腕７ｂの連結軸１０は連動リンク８の連結スリット９に沿って自由に移動可能となる。   Next, in the state of FIG. 3 corresponding to the state in which the bottom is horizontal, the movement preventing member 11 is rotated counterclockwise by the operation member 13 and dropped by its own weight as shown in FIGS. As shown in FIG. 9, in the state of being engaged with the engagement recess 14, the connecting shaft 10 of the interlocking arm 7 b can freely move along the connecting slit 9 of the interlocking link 8.

そこで図４の状態において、駆動腕１５により駆動軸５ａを図中時計回りに回動し、上述と同様に背ボトム２を傾斜状態に回動上昇する際、連動腕７ａの回動により連動リンク８が押動されて図中右方向に移動するが、連動腕７ｂの連結軸１０は連動リンク８の連結スリット９に沿って相対的に移動するだけで、連動リンク８から力を受けない。   Therefore, in the state of FIG. 4, when the drive shaft 5a is rotated clockwise in the drawing by the drive arm 15 and the back bottom 2 is rotated and raised in the inclined state as described above, the interlock link 7 is rotated by the rotation of the interlock arm 7a. 8 is pushed and moves rightward in the figure, but the connecting shaft 10 of the interlocking arm 7b only moves relatively along the connecting slit 9 of the interlocking link 8, and does not receive any force from the interlocking link 8.

このため図５に示すように、背ボトム２は回動上昇して傾斜状態となるが、膝ボトム３は水平位置に維持される。   For this reason, as shown in FIG. 5, although the back bottom 2 rotates up and it will be in an inclined state, the knee bottom 3 is maintained at a horizontal position.

図からも分かるとおり、膝ボトム３側の押上腕６ｂは，背ボトム２と同様にボトムと同方向に回転駆動するように駆動軸５ｂの上方に突設しており，そして連動腕７ｂは駆動軸５ｂの下方に突設しているため，膝ボトム３を回転駆動するための部材は，押上腕６ｂが最もベッドの足側に位置し，駆動軸５ｂや連動腕７ｂは，それよりも頭側に位置するので，背ボトム２と膝ボトム３を連動させるための機構を省スペースで構成することができる。   As can be seen from the figure, the push-up arm 6b on the knee bottom 3 side protrudes above the drive shaft 5b so as to rotate in the same direction as the bottom, similarly to the back bottom 2, and the interlocking arm 7b is driven. Since the knee bottom 3 is rotationally driven so as to protrude below the shaft 5b, the push-up arm 6b is positioned closest to the foot side of the bed, and the drive shaft 5b and the interlocking arm 7b are further on the head. Since it is located on the side, the mechanism for interlocking the back bottom 2 and the knee bottom 3 can be configured in a space-saving manner.

そして連動リンク８の膝ボトム側端部には，その長さ方向に連結スリット９を設けて膝ボトム３側の連動腕７ｂに設けた連動軸１０を移動可能に係合すると共に，連動リンク８には，連動軸１０に係合する移動阻止部材１１を操作可能に構成しているため，移動阻止部材１１を操作して連動軸１０を連結スリット９に対して移動不能とすることにより上述した背ボトム２と膝ボトム３の連動を行えると共に，移動阻止部材１１を操作して連動軸１０を連結スリット９に対して移動可能とすることにより，膝ボトム３を背ボトム２と連動させないように動作させることができる。   At the knee bottom side end of the interlocking link 8, a connecting slit 9 is provided in the length direction so that the interlocking shaft 10 provided on the interlocking arm 7b on the knee bottom 3 side is movably engaged. Since the movement blocking member 11 engaged with the interlocking shaft 10 is configured to be operable, the movement blocking member 11 is operated to make the interlocking shaft 10 immovable with respect to the connecting slit 9 as described above. The back bottom 2 and the knee bottom 3 can be interlocked and the interlocking shaft 10 can be moved relative to the connecting slit 9 by operating the movement blocking member 11 so that the knee bottom 3 is not interlocked with the back bottom 2. It can be operated.

移動阻止部材１１としては，その自重により移動阻止状態に移行することができるようにすることにより，ばね等の部品が不要となって部品点数を削減することができる。   The movement blocking member 11 can be shifted to the movement blocking state by its own weight, so that parts such as a spring are not required and the number of parts can be reduced.

以上のとおり，本発明の背膝ボトム連動機構は，上述したような数々の利点があり、医療用や家庭用のベッド等に利用して、産業上の利用可能性が大である。   As described above, the back knee bottom interlocking mechanism of the present invention has many advantages as described above, and has great industrial applicability when used for medical and home beds.

本発明の実施の形態の全体構成を示す模式的側面図である。It is a typical side view showing the whole composition of an embodiment of the invention. 図１の要部模式的側面図である。It is a principal part schematic side view of FIG. 図２とは別の局面で示した模式的側面図である。It is the typical side view shown in the situation different from FIG. 以上とは異なった局面において示す模式的側面図である。It is a typical side view shown in the situation different from the above. 以上とは更に異なった局面において示す模式的側面図である。It is a typical side view shown in the situation still different from the above. 移動阻止部材の動作を示す模式的要部側面図である。It is a typical principal part side view which shows operation | movement of a movement prevention member. 図６とは異なった局面において移動阻止部材の動作を示す模式的要部側面図である。It is a typical principal part side view which shows operation | movement of a movement prevention member in the situation different from FIG. 移動阻止部材の動作を示す模式的要部斜視図である。It is a typical principal part perspective view which shows operation | movement of a movement prevention member. 図６とは異なった局面において移動阻止部材の動作を示す模式的要部斜視図である。It is a typical principal part perspective view which shows operation | movement of a movement prevention member in the situation different from FIG. 従来の背膝ボトム連動機構の構成、動作を示す模式的側面図である。It is a typical side view which shows the structure and operation | movement of the conventional back knee bottom interlocking mechanism. 従来の背膝ボトム連動機構の構成、動作を他の局面において示す模式的側面図である。It is a typical side view which shows the structure and operation | movement of the conventional back knee bottom interlocking mechanism in another situation.

符号の説明Explanation of symbols

１ ベッドフレーム
２ 背ボトム
３ 膝ボトム
４ 足ボトム
５ａ，５ｂ 駆動軸
６ａ，６ｂ 押上腕
７ａ，７ｂ 連動腕
８ 連動リンク
９ 連結スリット
１０ 支持部
１１ 移動阻止部材
１２ 係合凹部
１３ 操作部材
１４ 係合凹部
１５ 駆動腕
１６ ローラー DESCRIPTION OF SYMBOLS 1 Bed frame 2 Back bottom 3 Knee bottom 4 Foot bottom 5a, 5b Drive shaft 6a, 6b Push-up arm 7a, 7b Linking arm 8 Linking link 9 Linking slit 10 Supporting part 11 Movement prevention member 12 Engaging recess 13 Operation member 14 Engagement Recess 15 Drive arm 16 Roller

Claims (2)

背ボトムを回転駆動する駆動軸と膝ボトムを回転駆動する駆動軸の夫々に押上腕と連動腕を設けると共に，それらの連動腕間に連動リンクを連結して，背ボトムの回転駆動に連動して膝ボトムを回転駆動可能に構成したベッドにおいて，背ボトム側と膝ボトム側の夫々の押上腕は，夫々のボトムと同方向に回転駆動する配置とし，背ボトム側の連動腕は駆動軸に対して上方側に突設すると共に，膝ボトム側の連動腕は駆動軸に対して下方側に突設し，連動リンクの膝ボトム側端部には，その長さ方向に連結スリットを設けて膝ボトム側の連動腕に設けた連動軸を移動可能に係合すると共に，連動リンクには，連動軸に係合する移動阻止部材を操作可能に構成したことを特徴とする背膝ボトム連動機構。 A push-up arm and an interlocking arm are provided on each of the drive shaft for rotationally driving the back bottom and the drive shaft for rotationally driving the knee bottom, and an interlocking link is connected between these interlocking arms to interlock with the rotational drive of the back bottom. In a bed configured to be able to rotate the knee bottom, the push-up arms on the back bottom side and the knee bottom side are arranged to rotate in the same direction as the bottom, and the interlocking arm on the back bottom side is connected to the drive shaft. The interlocking arm on the knee bottom side protrudes downward with respect to the drive shaft, and a connecting slit is provided in the length direction at the knee bottom side end of the interlocking link. A back knee bottom interlocking mechanism characterized in that the interlocking shaft provided on the interlocking arm on the knee bottom side is movably engaged, and the interlocking link is configured so that a movement blocking member engaging with the interlocking shaft can be operated. . 移動阻止部材は，前側に係合凹部を設けた回動片とし，自重により移動阻止位置まで回動し，操作部材により移動阻止位置から離す構成としたことを特徴とする請求項１に記載の背膝ボトム連動機構。 The movement blocking member is a rotating piece provided with an engagement recess on the front side, and is configured to rotate to a movement blocking position by its own weight and to be separated from the movement blocking position by an operation member. Back knee bottom interlocking mechanism.
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