JPS605305B2 - Gear Tsuji Betsudo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gage bed used for hospitals and the like.

Conventionally, this type of gear bed equipped with two or more movable floor plates that can be raised and lowered is equipped with two or more handles, motors, etc. that control the raising and lowering movement of each movable floor plate. It was common.

This invention aims to reduce production costs and improve operational simplicity by allowing a single handle or motor to selectively control the raising and lowering of a plurality of floorboards. .

The present invention will be described below with reference to illustrated embodiments. 1 is a base having casters 2 at the lower end; 3 is a movable bed frame supported on the base 4 via a pair of left and right front link mechanisms 4 and a rear link mechanism 5 so as to be able to rise and fall; 6, 7; ，
Reference numerals 8 and 9 denote four bed floor plates arranged side by side on this movable bed frame 3, and one end of the first floor plate 6 at the front is pivoted to the adjacent second floor plate 7 with a pin 10 so that it can be swung. The second floor plate 7 and the fourth floor plate 9 are pivoted at 12 and 13, respectively, to support plates 11 fixed to both sides of the third floor plate 8 whose base end is fixed, so that the second floor plate 7 and the fourth floor plate 9 can swing freely. Consists of movable floorboards.

A U-shaped support frame 14 is pivotally attached to the free end of the first floor plate 6, and is attached to an arbitrary notch of a support plate 15 provided on the side frame of the bed frame 3. 15a, it is possible to maintain the required inclination. The second and fourth movable floor plates 7, 9 each have mounting plates 16, 17 and structure rods 20, 2 on the lower surface of their base ends.
It has rocking arms 18 and 19 for hoisting that are fixed to each other via 1, and by rocking these arms, it can be rotated about fulcrums 12 and 13 in the upright direction. The mechanism of this part is almost the same as the one shown in the 1978 785. 25, 26 are screw spindles 25a, 26
A is a known telescopic rod that can be expanded and contracted by rotating the rod.One end of each rod is connected to the swing arms 18 and 19, and the ends thereof, that is, the threaded spindles 25a and 26a, are connected to universal joints 27 and 28 and clutches 29 and 30, respectively. is connected to a pair of driven gears 31 and 32 that mesh with each other.

Reference numerals 33 and 34 denote rotating shafts to which the gears 31 and 32 are fixed at one end and the clutches 29 and 30 are interposed in the middle.

These 33, 24 are all supported on the horizontal beam 3a of the bed frame 3 by bearings 35, 35, . . . . Reference numeral 36 denotes a main drive gear meshed with one of the driven gears 31 and 32, the rotating shaft 37 of which projects forward through the front plate 39 of the bed frame 3, with a handle 38 fixed to its tip. There is.

Therefore, with the clutches 29 and 30 engaged, the handlebar 3
8 causes the telescopic rods 25 and 26 to extend and contract, thereby making it possible to raise and lower the movable floor plates 7 and 9 as shown by chain lines in FIG.

Needless to say, if only one of the movable floor plates 7 or 9 is to be raised or lowered, the corresponding clutches 27, 28 may be disengaged. Clutch 2 above
9 and 30, as shown in FIGS.
By swinging sideways the wedge-shaped levers 41, 41 that protrude forward through the 0, the movable portion thereof is slid through the lotus pestle 42, and the on/off switching can be performed.

The front link mechanism 4 and the rear link mechanism 5, which support the bed frame 3 in a vertically movable manner, include a lower link 46 fixed to a rotatable horizontal shaft 45 constructed on the base 1;
It consists of an upper link 47 pivotally connected to its upper end,
The ends of the left and right upper links 47, 47 are fixed to horizontal shafts 48, 48, respectively, which are rotatably suspended horizontally on the bed frame 3.

A front worm wheel 49 and a rear worm wheel 50 are fixed to the horizontal shafts 48, 48 of the brackets, respectively, and worms 51, 52 are meshed with these, respectively. These worms 51 and 52 are fixed to a front rotating shaft 54 and a rear rotating shaft 55, respectively, which are connected via a clutch 53. A reversing rotating shaft 56 provided parallel to these rotating shafts 54 and 55 has a clutch 57 in the middle, and one end is connected to the front rotating shaft 54 via gears 58 and 59. The rotary shaft 54 is rotated in the opposite direction to the rotary shaft 54, and the other end is connected to the rear rotary shaft 55 via an equidirectional rotation transmission mechanism 60 such as a chain sprocket. As shown in FIGS. 5 and 6, the clutches 53 and 57 are connected to the rocking member 6 through the Hasumura 61 by operating the same single operation piece 41 as described above.
2 is swung in a seesaw manner, so that it can be operated intermittently in an alternating manner. That is, when one clutch 53 or 57 is engaged, the other clutch 57 or 23 is disengaged. A driving gear 63 is meshed with the gear 58 fixed to the front rotating shaft 54 on the opposite side to the gear 59. Bracket gear 63
A rotating shaft 64 having one end thereof has a clutch 65 at an intermediate portion thereof, and the other end thereof is meshed with the aforementioned driving gear 36 via a gear 66. In the above, when the clutches 29 and 30 for operating the movable floor plate are disengaged, the clutch 65 is turned on, and one 53 side of the alternating operation clutches 53 and 57 is turned on, the handle 38 is rotated. ,
This rotation is transmitted to the front rotating shaft 54 via the gears 36, 66, 63, and 58, and since the clutch 53 is "on", the rear rotating shaft 55 is also rotated integrally in the same direction.

Therefore, both worms 51, 52 are rotated in the same direction, and when the front link mechanism 4 is extended by, for example, the rotation of the worm wheels 49, 50 in the same direction, the rear link mechanism 5 is shortened, and the bed The entire frame 3 is tilted. Therefore, by selecting the direction of rotation of the handle 38, the entire bed frame 3 can be raised forward and
Or, you can arbitrarily change and adjust the degree of pocketing so that it is tilted forward. On the other hand, when the other clutch 57 of the alternatingly operated clutches 53, 57 is turned on and the handle 38 is rotated, the front worm 51 is rotated in a predetermined direction by the same power transmission path as described above. The rear worm 52 is rotated in the opposite direction to the front worm 51 via a transmission path on the reverse rotation shaft 56 side. Therefore, both the front and rear worm wheels 49, 50 are rotated in opposite directions,
Both the front and rear link mechanisms 4 and 5 are expanded and contracted at the same rate, and the bed frame 3 is raised and lowered. Note that the handle 38 may be configured such that the rotation main shaft 37 is rotated by a motor instead. This invention depends on the above,
By driving a single rotating main shaft 37 which is rotationally driven by a handle or the like, two or more movable floor plates 7 and 9 that can be raised and lowered can be raised and lowered either alternatively or simultaneously. Compared to conventional products equipped with a plurality of handles and motors, the present invention has the advantage of using a single power source, improving appearance, simplifying operation, and reducing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1 is a partially cutaway side view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is a side view of the bed floor plate. 5 is a plan view of the drive mechanism, FIG. 6 is a sectional view taken along line A-A in FIG. 5, FIG. 7 is a partial front view of the front plate of the bed frame, and FIG. FIG. 5 is a sectional view taken along line B-B in FIG. 3... Bed frame, 7, 9... Movable floorboard, 25,
26... Telescopic rod, 25a, 26a... Screw spindle, 29, 30... Clutch, 31, 32...
... Driven gear, 36 ... Main drive gear, 37.
...Rotating main shaft, 38...Handle. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1 Equipped with two or more movable floor plates 7 and 9 pivotally connected to the bed frame 3 so as to be able to raise and lower, and threaded spindles 25a and 26a of a plurality of telescopic rods 25 and 26 that control the raising and lowering movement of each of these floor plates 7 and 9. are connected to a pair of driven gears 31 and 32 that mesh with each other via clutches 29 and 30, respectively, and a main drive gear 36 that meshes with one of these gears is fixed to a rotating main shaft 37 that is rotationally driven by a handle 38 or the like. Gear Tsuji Betsudo characterized by being made.