JP2015054146A

JP2015054146A - Mount base swinging device

Info

Publication number: JP2015054146A
Application number: JP2013189930A
Authority: JP
Inventors: 大倉野　重幸; Shigeyuki Okurano; 重幸大倉野
Original assignee: OKURA ENGINEERING KK
Current assignee: OKURA ENGINEERING KK
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2015-03-23
Anticipated expiration: 2033-09-13
Also published as: JP5734376B2

Abstract

PROBLEM TO BE SOLVED: To provide a mount base swinging device which can achieve smooth swinging and can be used for a bed preventing pressure sore.SOLUTION: A mount base swinging device comprises: a mount base 1; a support body 2 for supporting the mount base 1 at the lower surface center on a floor F; drive arms 55 located in other two points that form a triangle along with the center in a plane view; and guide bodies 4 disposed in the vicinity of these drive arms 55 respectively. The support body 2 includes: an inner member 23 formed with a swollen outer peripheral surface 231 to be a convex spherical surface; and an outer member 24 formed with an inner peripheral surface 241 on a concave spherical surface sliding along the convex spherical surface. In the drive arm 55, one end is swingably connected to a mutually different position in a circumferential direction at both ends of a drive shaft 53, and the other end is swingably connected to the lower surface of the mount base 1. The guide body 4 includes: an inner member 44 formed with a swollen outer spherical surface 441 to be a convex spherical surface; an outer member 43 formed with an inner peripheral surface 431 on a concave spherical surface sliding along the convex spherical surface; and a shaft member 45 which linearly and slidably penetrates through the inner member 44 in a vertical direction.

Description

本発明は載台揺動装置に関し、特にベッド等を揺動させるのに適した載台揺動装置に関する。 The present invention relates to a table swing device, and more particularly to a table swing device suitable for swinging a bed or the like.

特許文献１には床ずれ防止のためにベッドを揺動可能とした姿勢変動ベッドが提案されている。ここでは、ベッド板の下面中央を、半球状凸部と半球状凹部を係合させた構造の連結支持部によって支持するとともに、支柱部とこれの先端を収容する支柱収容部よりなうガイド機構によってベッド板の四隅を上下方向へガイドしている。そして、ベッド一端の両側に設けた回転変換片によってモータの回転を上下動に変換してベッド全体を揺動させている。 Patent Document 1 proposes a posture change bed in which the bed can be swung to prevent a floor slip. Here, the center of the lower surface of the bed plate is supported by a connection support portion having a structure in which a hemispherical convex portion and a hemispherical concave portion are engaged, and a guide mechanism including a support column portion and a support column storage unit that stores the tip of the support unit. The four corners of the bed board are guided vertically. The rotation of the motor is converted into a vertical movement by the rotation conversion pieces provided on both sides of one end of the bed to swing the entire bed.

ＷＯ２００９／０３７７９２WO2009 / 037792

しかし、上記従来の姿勢変動ベッドにおける揺動構造では、ベッドの自由な揺動がガイド機構や回転変換片によって妨げられて、円滑な揺動作動が得られないという問題があった。 However, the conventional swing structure in the posture change bed has a problem that the free swing of the bed is hindered by the guide mechanism and the rotation conversion piece, and a smooth swing operation cannot be obtained.

そこで、本発明はこのような課題を解決し、円滑な揺動を実現して床ずれ防止ベッドに好適に使用できるとともに、ベッド以外の選別機等への利用も可能な載台揺動装置を提供することを目的とする。 Therefore, the present invention solves such problems, and provides a platform swinging device that can be used suitably for bedsore prevention beds by realizing smooth swinging and can also be used for sorters other than beds. The purpose is to do.

上記目的を達成するために、本第１発明では、載台（１）と、載台（１）をその下面の一点でフロア（Ｆ）上に支持する支持体（２）と、平面視で前記一点と三角形をなす他の二点に位置させられた駆動体（５５）と、これら駆動体（５５）の近くにそれぞれ配設されたガイド体（４）とを備え、前記支持体（２）は、外周面（２３１）を膨出する凸状球面としたインナ部材（２３）と、前記凸状球面に沿って摺動する凹状球面に内周面（２４１）を形成したアウタ部材（２４）とを備えて、インナ部材（２３）ないしアウタ部材（２４）の一方がフロア（Ｆ）側に固定されるとともに他方が載台（１）下面に固定され、前記駆動体（５５）は、回転する駆動軸（５３）の両端において周方向の互いに異なる位置に一端が揺動可能に連結されるとともに他端が前記載台（１）の下面に揺動可能に連結され、かつ、前記ガイド体（４）は、外周面（４４１）を膨出する凸状球面としたインナ部材（４４）と前記凸状球面に沿って摺動する凹状球面に内周面（４３１）を形成したアウタ部材（４３）と、前記インナ部材（４４）を上下方向へ直線摺動可能に貫通する軸部材（４５）とを備え、前記アウタ部材（４３）をフロア（Ｆ）側へ固定するととともに前記軸部材（４５）の上端を載台（１）の下面に固定する。 In order to achieve the above object, according to the first aspect of the present invention, the platform (1), the support (2) that supports the platform (1) on the floor (F) at one point on the lower surface, and a plan view. A driving body (55) positioned at the other two points forming a triangle with the one point, and a guide body (4) disposed near each of the driving bodies (55), the support body (2 ) Is an inner member (23) having a convex spherical surface that bulges the outer peripheral surface (231), and an outer member (24) having an inner peripheral surface (241) formed on a concave spherical surface that slides along the convex spherical surface. ), One of the inner member (23) to the outer member (24) is fixed to the floor (F) side and the other is fixed to the lower surface of the mounting table (1), and the driving body (55) At both ends of the rotating drive shaft (53), one end is pivotably connected to different positions in the circumferential direction. In addition, the other end of the guide body (4) is swingably connected to the lower surface of the table (1), and the guide body (4) has an inner member (44) having a convex spherical surface that bulges the outer peripheral surface (441). An outer member (43) having an inner peripheral surface (431) formed on a concave spherical surface that slides along the convex spherical surface, and a shaft member (45) that penetrates the inner member (44) so as to be linearly slidable in the vertical direction. The outer member (43) is fixed to the floor (F) side, and the upper end of the shaft member (45) is fixed to the lower surface of the mount (1).

本第１発明によれば、回転する駆動軸によって駆動体を異なるタイミングで移動させると、載台は支持体で支持された一点でインナ部材とアウタ部材が互いに球面で摺動することによって上記一点を中心に揺動させられる。そしてこの場合の揺動は、インナ部材とアウタ部材が互いに球面で摺動することによって揺動可能な状態で直線摺動する軸部材を有するガイド体によって横振れすることなく円滑に案内される。 According to the first aspect of the present invention, when the driving body is moved at different timings by the rotating driving shaft, the mounting base is supported by the supporting body at one point, and the inner member and the outer member slide on each other on the spherical surface. Can be swung around. In this case, the swinging is smoothly guided by the guide member having the shaft member that linearly slides while the inner member and the outer member slide on the spherical surfaces so as to be swingable.

本第２発明では、前記駆動軸（５３）の両端にそれぞれ板状の連結部材（５４）を設けて、当該連結部材（５４）の板面の周方向の複数位置に連結孔（５４１）を形成し、これら連結孔（５４１）に前記駆動体（５５）の一端がボールジョイント（５７）を介して揺動可能に連結されている。 In the second aspect of the invention, plate-like connecting members (54) are provided at both ends of the drive shaft (53), and connecting holes (541) are provided at a plurality of positions in the circumferential direction of the plate surface of the connecting member (54). The one end of the driving body (55) is swingably connected to the connecting holes (541) via a ball joint (57).

本第２発明においては駆動体を異なるタイミングで移動させる構造を簡易に実現することができる。 In the second invention, a structure for moving the driving body at different timings can be easily realized.

本第３発明では、前記載台（１）は長方形状をなして、その中心（Ｏ１）下面で前記支持体（２）によって支持されており、前記駆動体（５５）は、平面視で前記中心（Ｏ１）を頂点とし二等辺三角形をなす他の二点にそれぞれ配置されている。 In the third aspect of the invention, the table (1) described above has a rectangular shape and is supported by the support (2) on the lower surface of the center (O1), and the drive body (55) is Arranged at the other two points forming an isosceles triangle with the center (O1) as a vertex.

本第３発明の構造によれば、載台上にベッドクッションを載せて、載台の揺動によってベッドクッション上の病人等の体重重心を移動させることによって、円滑に作動する床ずれ防止用ベッドを実現することができる。 According to the structure of the third aspect of the invention, the bed slip prevention bed that operates smoothly can be obtained by placing the bed cushion on the platform and moving the body weight center of gravity of the sick on the bed cushion by swinging the platform. Can be realized.

上記カッコ内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。 The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

以上のように、本発明の載台揺動装置によれば、円滑な揺動を実現して床ずれ防止ベッドに好適に使用できるとともに、ベッド以外の選別機等への利用も可能である。 As described above, according to the platform swinging device of the present invention, smooth swinging can be realized and it can be suitably used for a bed slip prevention bed, and can also be used for a sorter other than the bed.

本発明の実施形態を示す、載台揺動装置を一端方向から見た全体斜視図である。It is the whole perspective view which looked at the platform rocking device from one end direction which shows the embodiment of the present invention. 載台揺動装置を他端方向から見た部分斜視図である。It is the fragmentary perspective view which looked at the mounting rocking device from the other end direction. 支持体の載台支持部の拡大垂直断面図である。It is an expanded vertical sectional view of the stage support part of a support body. ガイド体の載台ガイド部の拡大垂直断面図である。It is an expanded vertical sectional view of the mounting guide part of a guide body. 載台揺動装置を他端方向から見た駆動機構の拡大斜視図である。It is the expansion perspective view of the drive mechanism which looked at the mounting rocking device from the other end direction. 駆動機構の部分断面側面図である。It is a partial cross section side view of a drive mechanism. 載台の揺動行程を示す概念的斜視図である。It is a conceptual perspective view which shows the rocking | fluctuation process of a mounting base.

なお、以下に説明する実施形態はあくまで一例であり、本発明の要旨を逸脱しない範囲で当業者が行う種々の設計的改良も本発明の範囲に含まれる。 The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

（第１実施形態）
図１、図２には本発明の載台揺動装置を床ずれ防止ベッドに使用した例を示す。なお、図１は床ずれ防止ベッドを一端方向から見た全体斜視図、図２は床ずれ防止ベッドを他端方向から見た拡大部分斜視図である。図１において、ベッドクッションを載せる載台１は長方形状のフレームで構成されている。載台１はその中心が支持体２によって支持されており、支持体２は、フロアＦ上に位置する、外形が上記載台１と同様の長方形のベース枠３（図２）の横桟３１上に立設されている。 (First embodiment)
1 and 2 show an example in which the platform swinging device of the present invention is used for a bed slip prevention bed. 1 is an overall perspective view of the bed slip prevention bed viewed from one end direction, and FIG. 2 is an enlarged partial perspective view of the bed slip prevention bed viewed from the other end direction. In FIG. 1, a platform 1 on which a bed cushion is placed is composed of a rectangular frame. The platform 1 is supported at its center by a support 2, and the support 2 is positioned on the floor F and has a rectangular base frame 3 (FIG. 2) having the same outer shape as the table 1 described above. It stands on the top.

ここで、図３には支持体２の上端支持部の詳細構造を示す。支持体２は上記横桟３１上に立設された円筒部材２１の上端面にさらに軸部材２２を垂設した構造を有している。軸部材２２は段付きとなった小径部２２１を有し、小径部２２１の外周にリング状のインナ部材２３が摺動可能に嵌装してある。小径部２２１の上端には大径のワッシャ板２２２が装着されており、インナ部材２３は軸部材２２の大径部２２３端面とワッシャ板２２２の間で一定距離ｄだけ軸部材２２に沿う上下方向へ移動できるようになっている。インナ部材２３の外周面２３１は、軸部材２２の軸上に共通の中心Ｏ１を有する、外方へ膨出する球面となっている。 Here, FIG. 3 shows a detailed structure of the upper end support portion of the support 2. The support 2 has a structure in which a shaft member 22 is further suspended from the upper end surface of the cylindrical member 21 erected on the horizontal rail 31. The shaft member 22 has a small-diameter portion 221 with a step, and a ring-shaped inner member 23 is slidably fitted on the outer periphery of the small-diameter portion 221. A large-diameter washer plate 222 is attached to the upper end of the small-diameter portion 221. Can be moved to. The outer peripheral surface 231 of the inner member 23 is a spherical surface having a common center O1 on the shaft of the shaft member 22 and bulging outward.

インナ部材２３の外方にはリング状のアウタ部材２４が位置しており、アウタ部材２４の内周面２４１はインナ部材２３の外周面２３１に沿った球面に形成されて、両球面が摺動することによってアウタ部材２４は上記中心Ｏ１回りに一定角度範囲で三次元的に旋回可能である。アウタ部材２４は載台１の中央横桟１１（図２）の中央（すなわち載台１の中心）下面に突設した筒状ブラケット１２の周壁内周部に固定されている。これにより、載台１全体が上記中心Ｏ１回りに三次元的に自在に揺動可能となっている。なお、筒状ブラケット１２の下端面と円筒部材２１の上端面との間には軸部材２２の周囲に等間隔で複数のコイル状バネ部材１３が圧縮状態で配設されており、その伸張バネ力によって、アウタ部材２４を経てインナ部材２３に印加される載台１の荷重が緩和されている。なお、インナ部材２３を載台１側に、アウタ部材２４を支持体２側に設けても良い。 A ring-shaped outer member 24 is located outside the inner member 23. An inner peripheral surface 241 of the outer member 24 is formed into a spherical surface along the outer peripheral surface 231 of the inner member 23, and both spherical surfaces slide. As a result, the outer member 24 can turn three-dimensionally within a certain angular range around the center O1. The outer member 24 is fixed to the inner peripheral portion of the peripheral wall of the cylindrical bracket 12 projecting from the lower surface of the center (that is, the center of the mounting table 1) of the central horizontal rail 11 (FIG. 2) of the mounting table 1. As a result, the entire platform 1 can swing freely around the center O1 in a three-dimensional manner. A plurality of coiled spring members 13 are arranged in a compressed state around the shaft member 22 between the lower end surface of the cylindrical bracket 12 and the upper end surface of the cylindrical member 21, and the extension springs thereof. The force applied to the inner member 23 via the outer member 24 is reduced by the force. In addition, you may provide the inner member 23 in the mounting base 1 side, and the outer member 24 in the support body 2 side.

図１において、載台１の一端（図１の前端）左右位置下方にはそれぞれガイド体４が配設されており、これらガイド体４によって載台１の横振れが抑えられている。ガイド体４の詳細構造を図４に示す。ガイド体４はベース枠３上に立設された円筒部材４１（図５参照）を備えており、円筒部材４１の上端開口部にはこれを閉鎖するようにリング状の栓部材４２が嵌着されている。 In FIG. 1, guide bodies 4 are respectively disposed below one end (front end of FIG. 1) in the left-right position of the mounting table 1, and the lateral shaking of the mounting table 1 is suppressed by these guide bodies 4. The detailed structure of the guide body 4 is shown in FIG. The guide body 4 includes a cylindrical member 41 (see FIG. 5) erected on the base frame 3, and a ring-shaped plug member 42 is fitted to the upper end opening of the cylindrical member 41 so as to close it. Has been.

栓部材４２の内周にはアウタ部材４３が固定されており、アウタ部材４３の内周面４３１は凹状球面となっている。アウタ部材４３の内方にはリング状のインナ部材４４が位置しており、インナ部材４４は外周面４４１が上記アウタ部材４３の内周面４３１に沿った、これと共通の中心Ｏ２を有する外方へ膨出する凸状球面に形成されている。これにより、インナ部材４４は上記中心Ｏ２回りに一定角度範囲で三次元的に旋回可能である。インナ部材４４の中心開口４４２には軸部材４５が摺動可能に上下方向へ貫通させてあり、軸部材４５は上端が載台１の下面に固定されている。ここで、上記中心Ｏ２は軸部材４５の軸上に位置している。このような構造のガイド体４によって、揺動に伴って載台１が傾斜してもこれを上下方向へ円滑に案内することができる。なお、軸部材４５は載台１が水平な状態で必ずしも鉛直方向、すなわち円筒部材４１の軸線方向へ向いている必要は無く、むしろ載台１が水平な状態で鉛直方向から適度に傾けておくと、載台１の揺動時に若干のこじりによって適度な抵抗減衰力を生じさせることができる。 The outer member 43 is fixed to the inner periphery of the stopper member 42, and the inner peripheral surface 431 of the outer member 43 is a concave spherical surface. A ring-shaped inner member 44 is positioned inward of the outer member 43. The inner member 44 has an outer peripheral surface 441 along the inner peripheral surface 431 of the outer member 43 and having a common center O2. It is formed in a convex spherical surface that bulges in the direction. As a result, the inner member 44 can turn three-dimensionally within a certain angle range around the center O2. A shaft member 45 is slidably passed through the center opening 442 of the inner member 44 in the vertical direction. The shaft member 45 has an upper end fixed to the lower surface of the mounting table 1. Here, the center O <b> 2 is located on the axis of the shaft member 45. With the guide body 4 having such a structure, even if the mounting table 1 is tilted as it swings, it can be smoothly guided in the vertical direction. The shaft member 45 does not necessarily have to face in the vertical direction, that is, the axial direction of the cylindrical member 41 in a state where the mounting table 1 is horizontal, but rather is tilted moderately from the vertical direction in a state where the mounting table 1 is horizontal. Thus, an appropriate resistance damping force can be generated by a slight twist when the mounting table 1 is swung.

図１において、載台１の一端下方には駆動機構５が設けられている。駆動機構５はベース枠３上の前端部中央に設けられた駆動モータ５１と、駆動モータ５１の回転力を左右に分配するギアボックス５２を備えており、ギアボックス５２からはベース枠３の幅方向へ駆動軸５３がそれぞれ延びている。各駆動軸５３の先端は載台１下方の、上記各ガイド体４に近い外方位置へ延びており、駆動軸５３の各先端には円板状の連結部材５４が固定されている。 In FIG. 1, a drive mechanism 5 is provided below one end of the mounting table 1. The drive mechanism 5 includes a drive motor 51 provided at the center of the front end portion on the base frame 3 and a gear box 52 that distributes the rotational force of the drive motor 51 to the left and right. The drive shafts 53 extend in the directions. The front ends of the drive shafts 53 extend to the outer positions near the guide bodies 4 below the mounting table 1, and disk-like connecting members 54 are fixed to the front ends of the drive shafts 53.

連結部材５４の板面には周方向等間隔で同一円周上の四か所に連結孔５４１が設けてあり、左右の連結部材５４の互いに異なる連結孔５４１にそれぞれ駆動体としての駆動アーム５５の一端（下端）が連結されている。なお、本実施形態では、左右の駆動アーム５５は隣り合う連結孔５４１に連結されて、互いに９０度の角度位相差で上下動させられるようになっている。駆動アーム５５の他端（上端）は載台１の下面に連結されている。 On the plate surface of the connecting member 54, connecting holes 541 are provided at four positions on the same circumference at equal intervals in the circumferential direction, and driving arms 55 as driving bodies are respectively connected to different connecting holes 541 of the left and right connecting members 54. Are connected at one end (lower end). In the present embodiment, the left and right drive arms 55 are coupled to adjacent coupling holes 541 and are moved up and down with an angular phase difference of 90 degrees. The other end (upper end) of the drive arm 55 is connected to the lower surface of the mounting table 1.

駆動アーム５５の詳細を図５、図６に示す。駆動アーム５５の両端にはそれぞれ公知のボールジョイント５６，５７が装着されている。各ボールジョイント５６，５７はリング部５６１，５７１の球状凹面５６２，５７２内に回転自在に球体５６３，５７３を保持させたもので、一方のボールジョイント５６では球体５６３に貫設した軸体５６４を上記連結部材５４の連結孔５４１に結合し、他方のボールジョイント５７では球体５７３に貫設した軸体５７４を載台１の下面に設けたブラケット１２に結合してある。 Details of the drive arm 55 are shown in FIGS. Known ball joints 56 and 57 are mounted on both ends of the drive arm 55, respectively. Each of the ball joints 56 and 57 has a spherical concave surface 562 or 572 of the ring portion 561 or 571 and a spherical body 563 or 573 rotatably held therein. In one ball joint 56, a shaft body 564 penetrating the spherical body 563 is provided. The other ball joint 57 is coupled to the coupling hole 541 of the coupling member 54, and a shaft body 574 penetrating the spherical body 573 is coupled to the bracket 12 provided on the lower surface of the mounting table 1.

このような構造によって駆動アームは連結部材および載台にそれぞれ揺動可能に連結されている。なお、各駆動アーム５５の載台１との連結点は、平面視で、支持体２に支持された中心Ｏ１を頂点とする二等辺三角形を形成している。また、本実施形態では、載台１の他端（図１の後端）左右位置にはベース枠３との間にシリンダ式ダンパ６が設けられて、載台１の不要な振動を防止している。 With such a structure, the drive arm is swingably connected to the connecting member and the mounting base. In addition, the connection point of each drive arm 55 with the mount 1 forms an isosceles triangle having the center O1 supported by the support 2 as a vertex in plan view. In the present embodiment, a cylinder type damper 6 is provided between the base frame 3 at the left and right positions of the other end (the rear end in FIG. 1) of the mount 1 to prevent unnecessary vibration of the mount 1. ing.

上記構造の載台揺動装置において、駆動モータ５１を回転させると、左右の駆動アーム５５が上記角度位相差で上下方向へ移動させられる。これに伴い、載台１は一端（前端）の左右位置が異なるタイミングで上下動させられ、この結果、載台１は支持体２で支持された中心Ｏ１回りに揺動させられる。この揺動行程の一例を図７に示す。 In the mounting rocking device having the above structure, when the drive motor 51 is rotated, the left and right drive arms 55 are moved in the vertical direction with the angular phase difference. Accordingly, the mounting table 1 is moved up and down at a timing when the left and right positions of one end (front end) are different, and as a result, the mounting table 1 is swung around the center O1 supported by the support body 2. An example of this swinging stroke is shown in FIG.

載台１上にベッドクッションを載せて、その上に病人Ｍ等を横たえる場合には、病人Ｍの足側Ｍ１を、駆動機構５を設けた載台１の一端側（図１の手前側、図７の左端側）にする。この時、載台１は水平状態になるようにする。これは左右の駆動アーム５５で位置決めされている載台１の一端の高さが左右で同じになった時に、支持体２で支持されている載台１の中心Ｏ１の高さも同じ高さになるように各部の長さを調整しておくことで実現できる。 When a bed cushion is placed on the platform 1 and the sick person M or the like lies on the bed cushion, the foot side M1 of the sick person M is placed on one end side of the platform 1 provided with the drive mechanism 5 (the front side in FIG. (Left end side in FIG. 7). At this time, the mounting table 1 is set in a horizontal state. This is because when the height of one end of the platform 1 positioned by the left and right drive arms 55 is the same on the left and right, the height of the center O1 of the platform 1 supported by the support 2 is also the same. This can be realized by adjusting the length of each part.

駆動モータ５１を回転させると、載台１の一端右側がやや下降するとともに左側は上端まで上昇する（図７（２））。その後、載台１の一端右側は下端まで下降し左側もやや下降する（図７（３））。さらに、載台１の一端右側は殆ど下端付近に留まるのに対して左側が下端まで下降して、載台１の一端が全体として下端位置になる（図７（４））。その後、載台１の一端右側が大きく上昇し（図７（５））、続いて載台１の一端左側も上昇して載台１が水平となり、初期状態へ戻る（図７（６））。以上の工程を繰り返すことによって、病人Ｍの頭部の上下動を最小限に抑えつつ載台１を揺動させて、病人Ｍの体重重心を移動させることにより、床ずれの発生を効果的に防止することができる。 When the drive motor 51 is rotated, the right end of the stage 1 is slightly lowered and the left side is raised to the upper end (FIG. 7 (2)). Thereafter, the right end of the platform 1 descends to the lower end and the left side slightly descends (FIG. 7 (3)). Further, the right side of the platform 1 almost remains near the lower end, while the left side descends to the lower end, so that one end of the platform 1 becomes the lower end as a whole (FIG. 7 (4)). Thereafter, the right side of one end of the mounting table 1 is greatly raised (FIG. 7 (5)), and then the left side of one end of the mounting table 1 is also raised so that the mounting table 1 becomes horizontal and returns to the initial state (FIG. 7 (6)). . By repeating the above steps, the bed 1 is swung while minimizing the vertical movement of the head of the sick M, and the center of gravity of the sick M is moved, thereby effectively preventing the occurrence of bed slip. can do.

このような載台１の揺動時において、載台１は支持体２の中心Ｏ１回りにインナ部材２３とアウタ部材２４が互いに球面で摺動することによって上記中心Ｏ１回りに揺動させられる。この場合、本実施形態においては中心Ｏ１は距離ｄの範囲で上下動可能であるから揺動時のこじり力等を吸収することができる。さらに、載台１の揺動は、インナ部材４４とアウタ部材４３が互いに球面で摺動することによって揺動可能な状態で直線摺動する軸部材４５を有するガイド体４によって横振れすることなく円滑に案内される。また、駆動アーム５５はボールジョイント５６，５７を介して揺動可能な状態で連結部材５４の板面および載台１の下面に連結されているから、載台１の円滑な揺動作動が阻害されない。 During the swinging of the mounting table 1, the mounting table 1 is swung around the center O <b> 1 by sliding the inner member 23 and the outer member 24 on the spherical surface around the center O <b> 1 of the support 2. In this case, in the present embodiment, the center O1 can move up and down within the range of the distance d, so that it is possible to absorb the twisting force and the like during the swinging. Further, the platform 1 can be swung without being laterally swung by the guide body 4 having the shaft member 45 that linearly slides while the inner member 44 and the outer member 43 slide on a spherical surface. Guided smoothly. Further, since the drive arm 55 is connected to the plate surface of the connecting member 54 and the lower surface of the mounting table 1 in a swingable state via the ball joints 56 and 57, the smooth swinging operation of the mounting table 1 is obstructed. Not.

（第２実施形態）
上記実施形態では左右の駆動アーム５５の角度位相差を９０度としたが、例えば１８０度にして載台１を支持体２で支持された中心Ｏ１回りに対称形に旋回揺動させるようにしても良い。このようにすれば、例えば載台１上に、大小の穴を底壁に周状に設けた選別箱等を載置して、大小の商品等を選別する選別機として利用することができる。 (Second Embodiment)
In the above embodiment, the angle phase difference between the left and right drive arms 55 is 90 degrees. However, for example, the platform 1 is swung symmetrically around the center O1 supported by the support body 2 at 180 degrees. Also good. In this way, for example, a sorting box or the like in which large and small holes are provided circumferentially on the bottom wall can be placed on the platform 1 and used as a sorting machine for sorting large and small items.

なお、上記各実施形態では載台を長方形にしたがこれに限られるものではない。また、載台の中心と各駆動アームの連結点を平面視で二等辺三角形になるように配置したが、必ずしも二等辺三角形とする必要は無い。 In addition, although the mounting base was made into the rectangle in each said embodiment, it is not restricted to this. Moreover, although the connection point between the center of the mounting table and each drive arm is arranged to be an isosceles triangle in a plan view, it is not always necessary to use an isosceles triangle.

１…載台、２…支持体、２３…インナ部材、２３１…外周面、２４…アウタ部材、２４１…内周面、４…ガイド体、４３…アウタ部材、４３１…内周面、４４…インナ部材、４５…軸部材、４４１…外周面、５３…駆動軸、５４…連結部材、５４１…連結孔、５５…駆動アーム（駆動体）、５７…ボールジョイント、Ｆ…フロア、Ｏ１…中心。 DESCRIPTION OF SYMBOLS 1 ... Mounting stand, 2 ... Support body, 23 ... Inner member, 231 ... Outer peripheral surface, 24 ... Outer member, 241 ... Inner peripheral surface, 4 ... Guide body, 43 ... Outer member, 431 ... Inner peripheral surface, 44 ... Inner 45, shaft member, 441, outer peripheral surface, 53, driving shaft, 54, connecting member, 541, connecting hole, 55, driving arm (driving body), 57, ball joint, F, floor, O1, center.

Claims

載台と、載台をその下面の一点でフロア上に支持する支持体と、平面視で前記一点と三角形をなす他の二点に位置させられた駆動体と、これら駆動体の近くにそれぞれ配設されたガイド体とを備え、前記支持体は、外周面を膨出する凸状球面としたインナ部材と、前記凸状球面に沿って摺動する凹状球面に内周面を形成したアウタ部材とを備えて、インナ部材ないしアウタ部材の一方がフロア側に固定されるとともに他方が載台下面に固定され、前記駆動体は、回転する駆動軸の両端において周方向の互いに異なる位置に一端が揺動可能に連結されるとともに他端が前記載台の下面に揺動可能に連結され、かつ、前記ガイド体は、外周面を膨出する凸状球面としたインナ部材と前記凸状球面に沿って摺動する凹状球面に内周面を形成したアウタ部材と、前記インナ部材を上下方向へ直線摺動可能に貫通する軸部材とを備え、前記アウタ部材をフロア側へ固定するととともに前記軸部材の上端を載台の下面に固定したことを特徴とする載台揺動装置。 A mounting base, a support that supports the mounting base on the floor at one point on the bottom surface, a driving body that is positioned at two other points that form a triangle with the one point in plan view, and close to each of these driving bodies An inner member having an inner peripheral surface formed on a concave spherical surface that slides along the convex spherical surface, and an inner member having a convex spherical surface that bulges the outer peripheral surface. And one of the inner member and the outer member is fixed to the floor side, and the other is fixed to the lower surface of the mounting table, and the drive body is one end at different positions in the circumferential direction at both ends of the rotating drive shaft. And the other end of the guide body is swingably connected to the lower surface of the table, and the guide body includes an inner member formed as a convex spherical surface bulging an outer peripheral surface and the convex spherical surface. The outer peripheral surface is formed on a concave spherical surface that slides along And a shaft member penetrating the inner member so as to be linearly slidable in the vertical direction. The outer member is fixed to the floor side, and the upper end of the shaft member is fixed to the lower surface of the mounting table. A platform swing device.

前記駆動軸の両端にそれぞれ板状の連結部材を設けて、当該連結部材の板面に周方向の複数位置に連結孔を形成し、これら連結孔に前記駆動体の一端がボールジョイントを介して揺動可能に連結されている請求項１に記載の載台揺動装置。 Plate-like connecting members are provided at both ends of the drive shaft, and connecting holes are formed at a plurality of positions in the circumferential direction on the plate surface of the connecting member, and one end of the driving body is connected to these connecting holes via a ball joint. 2. The platform swinging device according to claim 1, wherein the platform swinging device is swingably connected.

前記載台は長方形状をなして、その中心下面で前記支持体によって支持されており、前記駆動体は、平面視で前記中心を頂点とし二等辺三角形をなす他の二点にそれぞれ配置されている請求項１又は２に記載の載台揺動装置。 The above-mentioned platform has a rectangular shape and is supported by the support body on the lower surface of the center thereof, and the driving bodies are respectively arranged at other two points forming an isosceles triangle with the center at the top in a plan view. The mounting rocking device according to claim 1 or 2.