JP4087809B2 - Lifting mechanism of lifting platform, lifting platform using this lifting mechanism - Google Patents

Description

  The present invention provides a mounting unit such as a seat seat on which a human, an animal, an article, etc., such as a patient, is mounted or held, including a medical table used for medical examination, dentistry, veterinary examination and treatment. The present invention relates to an elevating mechanism that elevates and lowers with respect to a base of the elevating platform and an elevating platform using the elevating mechanism.

Elevator including a medical table used for medical examination, dentistry, and veterinary examination and treatment, equipped with a base for installing the entire elevator on the floor, and a patient is placed or held by the lifting mechanism Among the elevators that raise and lower the part relative to the base, the movable elevator part is fixed to the mounting part, is supported by the support part, and the guide part fixed to the base causes the movable elevator part to Lifting platforms that guide the raising and lowering are widely known.
Since the guide part needs to support at least the weight of the patient or the like plus the weight of the mounting part, it may be required to be quite robust. Many are provided with a roller for guiding the part. In the conventional lifting platform, in order to support the guide part more firmly, a casting is used for the base part that fixes the guide part to the base, or the guide part itself is made of a casting that is integral with the base part. It was fixed. The lifting mechanism described in Japanese Patent Publication No. 61-007108 is also premised on a base made of such a casting, although it is not clearly shown in the specification.
FIG. 8 shows an example of such a lifting mechanism of a lifting platform that has been widely known conventionally. The lifting mechanism 8 ′ is fixed on a base 13 ′ and is moved up and down. Guide part 10 'which guides the raising / lowering movement of part 9', base part 11 'which fixes guide part 10' to base 13 ', and drive part 12' which acts on movable raising / lowering part 9 'and raises / lowers are provided.
The top part of the movable elevating part 9 'is fixed to a mounting part (not shown) and supports the mounting part from below. The base 11 'is integrally formed of a casting.
Japanese Patent Publication No. 61-007108

However, if the base portion is made of a casting, it is necessary to adjust the expansion and contraction during casting, so that it takes a lot of cost and labor to form the mold.
In addition, when manufacturing a product with slightly changed dimensions, it is necessary to form a mold from the beginning. Especially, even when the number of manufactured products is small, the cost is the same as that for mass production. It was hanging.
Furthermore, when transporting and storing as a part, since it is a three-dimensional casting, it takes a space.
Since the conventional base has the above problems, an elevating mechanism and an elevating table that eliminate these problems have been desired.

In order to solve this problem, the lifting mechanism of the lifting platform according to claim 1 of the present invention includes a cylindrical base portion standing on the lifting platform base and a guide portion fixed to the upper portion of the cylindrical base portion. And a movable lifting part that is guided by the guide part and is inserted through the cylindrical base part so as to be movable up and down and has a mounting part fixed to the upper part, and a driving part that drives the movable lifting part to move up and down. In the lifting / lowering mechanism, at least the cylindrical base portion is composed of four flat metal plates, and the flat metal plate is provided with a plurality of welding joint holes and the plurality of welding joint holes. A plurality of protrusions are provided, and the welding holes provided in the flat metal plate and the protrusions are paired so that the flat metal plates are assembled in a cross-beam shape, and the internal space of the cylindrical base is is formed by joining by welding so as to form a substantially rectangular prism, said drive It is characterized in that a substantially cylindrical movable lifting portion configured separately to be accommodated within the interior space and.

Moreover, the lifting platform shown in claim 2 of the present invention uses the lifting mechanism.

According to the configuration of the present invention, since the base of the lifting mechanism of the lifting platform is made of a metal plate, there is no need to adjust the expansion and contraction during casting as in the case of casting, and the cost for forming the base・ Work can be reduced.

Moreover, even when a product with slightly changed dimensions is manufactured, it is possible to respond quickly, and in particular, even when the number of manufactured products such as custom-made products is small, it can be handled at low cost and with little effort.

In addition, when transporting and storing as parts, if it is in the state of a metal plate before assembly, it can be dispersed and transported with a small weight, and it can be stacked and stored, so that space is effectively saved. Available.
When the metal plate is composed of a plurality of flat plates, the above-described effect appears more remarkably.

Further, if the metal plate is composed of a plurality of welding joint holes and a flat plate provided with a plurality of protrusions provided so as to face the plurality of welding joint holes, and the metal plates are joined together by welding, the strength Great effect.

The best mode for carrying out the invention will be described below.

FIG. 1 shows a base of a lifting mechanism of a lifting platform according to the present invention and a lifting platform using this lifting mechanism. Reference numeral 1 denotes an elevator including a medical table used for medical examination, dentistry, veterinary examination and treatment, for example, and a base part 7 provided at the bottom of the elevator 1 for installing the elevator 1 on the floor or the like. As shown in the broken view, the elevating unit 6 that is connected to the base unit 7 and includes an elevating mechanism 8 to be described later, a patient or the like is placed or held, and is elevated by the elevating unit 6, for example, a seat It consists of a placement portion 2 such as a sheet.
The base portion 7 further includes a base 13 in contact with the floor or the like at the bottom thereof.

FIG. 2 is a view showing the lifting mechanism of the lifting platform of the present invention. As shown in FIG. 2, the elevating mechanism 8 is fixed on a base 13 of the base unit 7, a movable elevating unit 9 that moves up and down, a guide unit 10 that guides the elevating movement of the movable elevating unit 9, and a guide unit 10. The base 11 is fixed to the base 13, and the drive unit 12 is moved up and down by acting on the movable lift 9.
The drive unit 12 is a hydraulic cylinder, and the piston 12 </ b> A is driven up and down to act on the mounting support unit 93 that supports the mounting unit of the movable lifting unit 9 and is driven up and down. It is preferable to use a cylinder such as a hydraulic cylinder for the drive unit 12. Alternatively, the drive unit 12 may be driven to move up and down by acting on the movable lift unit 9 with a ball screw provided on the drive shaft of the motor. The chain fixed to the elevating unit 9 may be driven to drive the movable elevating unit 9 up and down, and various well-known or publicly known elevating drive methods can be employed.
The placement section 2 that holds a patient or the like is fixed to the placement support section 93 of the movable elevating section 9 and is moved up and down by the elevating movement of the movable elevating section 9.

FIG. 3 is a sectional view of the lifting mechanism 8 shown in FIG. In the embodiment of the present invention, the movable elevating part 9 is provided with a rod-like or cylindrical elevating member 91, and the guide part 10 is provided with a through hole 101 through which the elevating member 91 can pass. The guide unit 10 is provided with a plurality of guide rollers 102 in contact with the elevating member 91 and surrounding the elevating member 91 so that the elevating movement of the elevating member 91 of the movable elevating unit 9 is smoothly guided. ing. The elevating member 91 has a rod shape or a cylindrical shape, and has a continuous smooth flat surface 92 in contact with the rotating surface of the roller at a position where the roller 102 contacts.

In the present embodiment, a total of eight rollers 102 have a rotation axis on a virtual plane orthogonal to the lifting / lowering movement direction of the lifting / lowering member, and become a pair of two arranged side by side in the lifting / lowering movement direction of the lifting / lowering member, The elevating member 91 is guided in contact with the elevating member 91 at a position surrounding the elevating member 91 from four directions.
Although the elevating member 91 has a substantially cylindrical shape in the present embodiment, it may be a triangular prism, a quadrangular prism, other polygonal cylinders, a substantially cylindrical shape with a substantially elliptical cross section, or an arbitrary shape. However, it is desirable that the surface in contact with the roller 102 is a smooth plane.

The main body of the guide unit 10 may be formed of a casting or a metal plate. Instead of the roller 102, various other shapes of rolling elements can be provided in the guide unit 10. Moreover, you may use the components which guide sliding like a slide guide.
The roller 102 does not need to surround the elevating member 91 from four directions, and any roller may be used as long as it regulates and supports the movement of the elevating member 91 in a direction orthogonal to the elevating movement direction.

Further, the guide unit 10 may use only an opening that forms a cross-sectional shape space that matches the cross-sectional shape of the elevating member 91 without using the roller 102. Further, in this case, the cross-sectional shape of the elevating member 91 Even if the cross-sectional shape spaces do not completely coincide with each other, they may partially coincide with each other as long as the movement of the elevating member 91 in the direction orthogonal to the elevating movement direction is restricted and supported.
As a matter of course, the guide mechanism of the other guide unit 10 may have various forms such as the above-described roller, other rolling elements, an opening shape, etc., or a combination of these appropriately.

FIG. 4 is an assembly view in which the base 11 of the lifting mechanism 8 is disassembled into main components. In the present embodiment, “upper”, “lower”, “side”, “top”, and “bottom” in the description of each element such as parts are elements of each part when completed as a lifting platform. It defines which part of the.

11C is a flat fixing metal plate having a uniform thickness, and the guide portion 10 is placed and fixed on a flat surface. 11A1, 11A2, 11B1, and 11B2 are support metal plates, which are fixed vertically on the base 13 to form a support portion 11AB shown in FIG. 3 for supporting the fixation metal plate 11C.
The fixing metal plate 11C is horizontally fixed to the top of the support portion 11AB and supported by the support portion 11AB. The guide portion 10 has a screw hole 103 and is fixed to the screw hole 11CB of the fixing metal plate 11C with the screw 104 shown in FIGS.
The guide portion 10 is fixed to the base 13 by fixing the base 11 to the base 13.

The supporting metal plates 11A1, 11A2, 11B1, and 11B2 are assembled in a substantially parallel beam shape and joined to each other. The supporting metal plates 11A1 and 11A2 are iron plates having the same shape and the same dimensions, and are flat, substantially rectangular metal plates having a uniform thickness.
The supporting metal plates 11B1 and 11B2 are also iron plates having the same shape and the same dimensions, and are flat, substantially rectangular metal plates having a uniform thickness.

The supporting metal plates 11A1 and 11A2 are arranged in parallel and are erected on the base. The supporting metal plates 11B1 and 11B2 are also arranged in parallel and are erected on the base. The flat surfaces of both the supporting metal plates 11A1 and 11A2 and the flat surfaces of both the supporting metal plates 11B1 and 11B2 are arranged in the vertical direction.
The sides on both sides of both the supporting metal plates 11B1 and 11B2 are arranged so that the flat surfaces of both the supporting metal plates 11A1 and 11A2 are sandwiched. In this way, the supporting metal plates 11A1, 11A2, 11B1, and 11B2 form a substantially rectangular cylindrical space inside.

A part of the upper side 11A10 of the supporting metal plate 11A1 protrudes further upward to form a convex portion 11A10A. The convex portions 11A10A are inserted into a plurality of through holes 11CA provided on the fixing metal plate 11C and penetrating the fixing metal plate 11C on the front and back sides.
A part of the lower side 11A11 of the supporting metal plate 11A1 protrudes further downward to form a convex portion 11A11A. The convex portions 11A11A are fitted into a plurality of concave portions 13A provided downward from the upper surface of the base 13.

A plurality of protrusions 11B10A and 11B20A provided on both sides of both of the support metal plates 11B1 and 11B2, which will be described later, are inserted into the support metal plate 11A1. A through hole 11A12A is provided.

The configuration of the support metal plate 11A2 is the same except that the position of the support metal plate 11A2 itself is different from that of the support metal plate 11A1. The supporting metal plate 11A2 corresponds to the protruding portion 11A20A inserted into the through hole 11CA of the fixing metal plate 11C, which corresponds to the protruding portion 11A10A of the supporting metal plate 11A1, and the protruding portion 11A11A of the supporting metal plate 11A1. The supporting metal plate 11A1 for inserting the protruding portion 11A21A fitted into the recessed portion 13A of the base 13, the protruding portion 11B10A of the supporting metal plate 11B1 described later, and the protruding portion 11B20A of the supporting metal plate 11B2. A plurality of through holes 11A22A corresponding to the through holes 11A12A are provided.

A part of the sides 11B10 on both sides of the supporting metal plate 11B1 further protrudes on both sides to form a plurality of convex portions 11B10A. The convex portion 11B10A is inserted into the aforementioned through hole 11A12A provided in the supporting metal plate 11A1 and the aforementioned through hole 11A22A provided in the supporting metal plate 11A2.

The configuration of the support metal plate 11B2 is the same except that the position of the support metal plate 11B2 itself is different from that of the support metal plate 11B1. The support metal plate 11B2 is provided with a plurality of convex portions 11B20A corresponding to the plurality of convex portions 11B10A of the support metal plate 11B1.
The convex portion 11B20A is inserted into the aforementioned through hole 11A12A provided in the supporting metal plate 11A1 and the aforementioned through hole 11A22A provided in the supporting metal plate 11A2.

As described above, all of the supporting metal plates 11A1, 11A2, 11B1, and 11B2 are assembled together to form the supporting portion 11AB, and the convex portions 11A11A and 11A2 of the supporting metal plate 11A1 are formed as the concave portions 13A of the base 13. The supporting metal plates 11A1, 11A2, 11B1, and 11B2 are fixed to the base 13 vertically.

In the above-described embodiment, the supporting metal plates 11A1, 11A2, 11B1, and 11B2 are fixed to the base 13, but the convex portions 11A11A and 11A2 of the supporting metal plate 11A1 are the concave portions of the base 13. Although an example of fitting to 13A has been shown, it is not necessary to provide a recess in the base 13, and as shown in FIG. 5, instead of the projection 11A11A, a support metal plate at the lower side 11A11 of the support metal plate 11A1 Protrusions 11A11B extending laterally from the flat surface of 11A1 are provided, screws 14 are passed through through-holes passing through the protrusions 11A11B up and down, and fastened to screw holes (not shown) provided in the base 13, The supporting metal plate 11A1 may be fixed to the base 13. Since it is the same for fixing the supporting metal plate 11A2 to the base 13, detailed description thereof is omitted.

The heights of the supporting metal plates 11A1, 11A2, 11B1, and 11B2 are as follows: the convex portion 11A10A of the supporting metal plate 11A1 inserted into the through hole 11CA of 11C, the convex portion 11A20A of the supporting metal plate 11A2, and the base 13 Except for the convex portions 11A11A of the supporting metal plate 11A1 inserted into the concave portion 13A and the convex portions 11A21A of the supporting metal plate 11A2, they are aligned at a constant height H1 shown in FIG.

When the support metal plate 11B1, 11B2, 11A1, and 11A2 are assembled together to form the support portion 11AB, the upper and lower positions of the support metal plates 11B1, 11B2, 11A1, and 11A2 are aligned, and the above-described convexity of the support metal plate 11A1 is formed. The convex portion of the aforementioned support metal plate 11B1 so that the overall height of the support portion 11AB excluding the portions of the portions 11A10A, the convex portions 11A11A, the convex portions 11A20A, and the convex portions 11A21A of the support metal plate 11A2 is H1. 11B10A, the convex portion 11B20A of the supporting metal plate 11B2, and the relative positions of the through hole 11A12A of the supporting metal plate 11A1 and the through hole 11A22A of the supporting metal plate 11A2 are determined.

At a position where the convex portion 11B10A and the convex portion 11B20A are inserted into the through hole 11A12A and the through hole 11A22A, at least a part of the convex portion 11B10A and the convex portion 11B20A and the through hole 11A12A and the through hole 11A22A are welded to each other to support metal The plates 11B1, 11B2, 11A1, and 11A2 are joined to each other.

That is, the through-hole 11A12A and the through-hole 11A22A are formed as a plurality of welding joint holes, and the convex portions 11B10A and the convex portions 11B20A are provided to be opposed to the through-holes 11A12A and the through-holes 11A22A that are welding joint holes. Formed as a protrusion.

In the above-described configuration, the example in which the convex portions 11B10A and the convex portions 11B20A are inserted into the through holes 11A12A and the through holes 11A22A is not necessarily required to penetrate, but instead of the through holes 11A12A and the through holes 11A22A, the concave portions that do not penetrate. The projections 11B10A and 11B20A may be fitted into the recesses and welded.

Through holes 11A12A are provided on both sides of the supporting metal plate 11A1 or in the vicinity of both sides, and through holes 11A22A are provided on both sides or in the vicinity of both sides of the supporting metal plate 11A2, thereby providing a plurality of supporting metal plates 11B1, 11B2. , 11A1 and 11A2 can be formed such that the adjacent sides or the vicinity of the adjacent sides are joined to each other.

In the above-described embodiment, the convex portions 11B10A and the convex portions 11B20A are inserted into the through holes 11A12A and the through holes 11A22A, or the convex portions 11B10A and the convex portions 11B20A are fitted into the concave portions to support the metal plates 11B1, 11B2, and 11A1. 11A2 and the metal plate 11C for fixing are shown to be joined to each other, but there are no projections, through-holes, recesses or the like to be inserted or fitted to each other, and the metal plates for support 11B1, 11B2, 11A1, 11A2 are fixed. The metal plate 11C may be joined at least partially by welding or adhesion to each other, or may be joined by screwing or the like.

As materials for the supporting metal plates 11A1, 11A2, 11B1, 11B2 and the fixing metal plate 11C, it is more preferable from the viewpoint of workability and strength to use iron including a steel plate such as stainless steel.

As the supporting metal plates 11A1, 11A2, 11B1, 11B2, and the fixing metal plate 11C, it is more preferable to use a metal plate cut out from a metal material because it can be easily processed into a desired shape and size.

As the metal material, for example, many plate-like materials made of a rolled metal material having a uniform thickness are commercially available, and can be easily obtained at low cost and used.

Further, it is more preferable to cut out the metal material by laser processing because even a complicated contour line can be accurately and reasonably cut to fit a desired size and shape.

The plurality of metal plates do not need to be erected on the base 13 in a true vertical direction. For example, the plurality of metal plates may be erected obliquely so that the plurality of metal plates are assembled in a trapezoidal shape. Standing vertically is preferable in terms of space saving and strength.

Moreover, in the figure of the said Example, although the movable raising / lowering part 9 shows the example which raises / lowers a vertical direction, it is not necessary to raise / lower especially only in the perpendicular direction, for example, the guide part 10 is the movable raising / lowering part 9 May be provided to be inclined so that the movable elevating unit 9 is driven to move up and down diagonally.

In the above example, the configuration using four supporting metal plates is shown, but three supporting metal plates 21A1, 21A2, and 21B1 may be combined in a triangular prism shape as shown in FIG.

Further, as shown in FIG. 7, two supporting metal plates 31A1 and 31A2 may be combined in a cross shape. Furthermore, although not shown in the drawing, five metal plates may be combined in a pentagonal prism shape, six may be combined as a hexagonal column, seven may be combined as a heptagonal column, and so on.

  In the lifting mechanism of the lifting platform and the lifting platform using this lifting mechanism, the cylindrical base portion that supports the guide portion that guides the movable lifting portion of the lifting mechanism and is fixed to the base is replaced with a conventional casting, and As mentioned above, it can be set as the structure which joined the some metal plate by welding.

It is explanatory drawing which showed the raising / lowering mechanism of the raising / lowering stand of this invention, and the raising / lowering stand using the raising / lowering mechanism. Example 1 It is explanatory drawing which showed the raising / lowering mechanism of the raising / lowering stand of this invention. Example 1 It is explanatory drawing which showed the cross section of the raising / lowering mechanism of the raising / lowering stand of this invention. Example 1 It is the assembly figure which decomposed | disassembled and showed the base part of the raising / lowering mechanism of the lifting platform of this invention to the main components. Example 1 It is explanatory drawing which showed another Example of the raising / lowering mechanism of the lifting platform of this invention. (Example 2) It is explanatory drawing which showed another Example of the raising / lowering mechanism of the lifting platform of this invention. (Example 3) It is explanatory drawing which showed another Example of the raising / lowering mechanism of the lifting platform of this invention. Example 4 It is explanatory drawing which showed the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lift stand 2 Mounting part 6 Lift part 7 Base part 8 Lift mechanism 9 Movable lift part 10 Guide part 11 Base part 11A1 Support metal plate 11A10A Protrusion part 11A11A Protrusion part 11A11B Protrusion part 11A12A Through-hole 11A2 Support metal convex part 11A20A Part 11A21A Convex part 11A22A Through hole 11B1 Support metal plate 11B10A Convex part 11B2 Support metal plate 11B20A Convex part 11AB Support part 11C Fixing metal plate 11CA Through hole 12 Drive part 13 Base 13A Concave part 21A1 Support metal plate Metal plate 21A3 Metal plate for support 31A1 Metal plate for support 31A2 Metal plate for support

Claims (2)

A cylindrical base portion erected on the base of the elevator, a guide portion fixed to the upper portion of the cylindrical base portion, and an upper portion guided by the guide portion so as to be movable up and down within the cylindrical base portion In a lifting mechanism of a lifting platform composed of a movable lifting part with a mounting part fixed to and a drive part that drives the movable lifting part up and down,
At least the cylindrical base is composed of four flat metal plates,
The flat metal plate is provided with a plurality of welding joint holes and a plurality of protrusions provided to face the plurality of welding joint holes,
Furthermore, the welding hole provided in the flat metal plate and the projection are paired so that the flat metal plates are assembled in a cross beam shape so that the internal space of the cylindrical base portion forms a substantially quadrangular column. A lifting / lowering mechanism for a lifting platform characterized in that a substantially cylindrical movable lifting / lowering part configured by welding and configured separately from the driving part can be accommodated in the internal space .
Lifting platform with lifting mechanism according to claim 1.

Images