JP2015054146A - Mount base swinging device - Google Patents

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

  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.

  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 / 037792

  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.

  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.

  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).

  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.

  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).

  In the second invention, a structure for moving the driving body at different timings can be easily realized.

  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.

  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.

  The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

  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.

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. It is the fragmentary perspective view which looked at the mounting rocking device from the other end direction. It is an expanded vertical sectional view of the stage support part of a support body. It is an expanded vertical sectional view of the mounting guide part of a guide body. It is the expansion perspective view of the drive mechanism which looked at the mounting rocking device from the other end direction. It is a partial cross section side view of a drive mechanism. It is a conceptual perspective view which shows the rocking | fluctuation process of a mounting base.

  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.

(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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

(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.

  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.

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 (3)

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. 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. 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.

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