JP3013926B2 - Stretching / reverse stretching mechanism for beds etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for spreading / reversing a bed or the like, which is said to be particularly useful in therapy.

[0002]

2. Description of the Related Art Hitherto, various mechanisms have been proposed for adjusting a posture supporting state of a bottom of a bed or the like, and the mechanism is actually mounted on a bed or the like and commercialized. Among them, the extension mechanism (Trendelenberg mechanism) that lowers the head side of the bottom in beds and the like, and the reverse extension mechanism (Reverse Trendelenberg mechanism) that tilts the foot side of the bottom lower.
Is a function that is useful for treatment because it allows a patient to be in a position optimal for an injured or illness. Until now, in the case of such a mechanism, in the case of manual operation, the expanding operation is performed by the switching device 1 using the gear mechanism 4 as shown in FIG.
That is, the power from the manual handle 2 is selectively transmitted to the gear 4b connected to the high-low starting portion on the headboard side and the gear 4c connected to the high-low starting portion on the footboard side by the switching lever 3 via the gear 4a. Had to do it. In the case of the electric type, two motors are used for expansion.

[0003]

As described above, in the above-described mechanism, the power is selectively transmitted to the high-low mechanism on the headboard side and the footboard side by the switching device 1 so that the high-low mechanism is operated to perform expansion. Therefore, in addition to the high-low mechanism, the above-described switching device 1 is required. Also,
When a normal high-low operation is performed after the expansion operation, it is necessary to adjust the high-low mechanism on the footboard side and the headboard side at the same time so that the main frame can be moved up and down in a horizontal state. On the other hand, in the system using two motors, a controller for energizing any one of the motors is indispensable at the time of normal high-low operation and a control configuration is complicated, and cost increase is avoided. It will not be possible. The present invention has been proposed in view of the above background, and has a simpler configuration.
The bottom posture can be adjusted to the patient's illness,
An object of the present invention is to provide an extension / reverse extension mechanism for a bed or the like.

[0004]

In order to solve the above-mentioned problems, the present invention has a pair of high-low links for supporting a middle floor supporting a floor, and the pair of high-low links are activated by an activation means so as to have the same angle. In a bed or the like provided with a lifting mechanism configured to raise and lower the middle floor by interlocking displacement, the high-low link includes a pair of up-and-down arms having one end side rotatably attached to the base frame side and the other end of the up-and-down arm It has a horizontal axis provided so as to connect the sides, and an intermediate floor link receiver rotatably attached to the horizontal axis, and a high-low freely fixed to the horizontal axis in a head-side high-low link such as a bed. Links and
Between突腕projecting from the horizontal axis in the HiLo link foot end ligated with Hi-Lo associated rod, and突腕in hi-lo link the HiLo associated rod and the foot side, the HiLo communication
The protruding part of the high-low link on the foot side
A state in which a connecting shaft penetrating the arm tip side is movably inserted.
Connected by state, operating in the direction in which undulations arm stands up in high-low link the both while transmitting power from the activation means simultaneously in the direction of lodging the relief arm is pulled by the activation means HiLo link rostral When doing this, the high-low link on the foot side is configured to be returned from the movement of the high-low interlocking rod with an equal angular displacement as a state independent of the movement of the high-low interlocking rod, and when the high-low link on the foot side returns to the displacement, via the connecting shaft on the tip end of the protruding arm An extension operation lever for performing an extension operation by preventing the high / low link on the foot from returning to the displacement position, and the extension operation lever is adapted to receive the connecting shaft of the protruding arm. While having a locking portion to stop, on the high-low free link provided on the horizontal axis of the high-low link on the head side, A reverse extension / retraction operating lever configured to form a reverse extension / expansion mechanism to be driven, and a reverse extension / retraction operating lever detachable from the link stopper; In the state of being operated and locked to the locking portion of the extension operation lever and restrained, the activation means pulls in the high-low free link in the head-side high-low link and operates the raising / lowering arm in the direction of falling down, Prevents the high-low link on the foot from returning to its original position, lowers the floor on the head side compared to the foot, sets it in the extended state, and operates the reverse extension operation lever to hold the link stopper. While restraining the head-side high-low link by this, from the connection axis in the protruding arm of the foot-side high-low link,
With the extension operation lever removed, the high-low link in the head side high-low link is pulled in by the activation means, the floor on the foot side is lowered compared to the head side, and the floor is in the reverse extension state. .

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an extension / reverse extension mechanism for a bed or the like according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an elevating mechanism 10 for a floor portion of a bed or the like. The lifting mechanism 10 is a base frame (not shown) of a bed or the like.
A pair of high-low links 11, 11 for supporting a middle floor (not shown) supporting the floor so as to be able to ascend and descend, and the pair of high-low links 11, 11 are manually driven by a high-low activation unit 12, which is a power means. The same angle, interlocking displacement
The middle floor is adjusted up and down.

The high-low links 11, 11 have a pair of up-and-down arms 11a, one end of which is rotatably attached to the base frame side via a base frame-side link receiver 13.
And a horizontal shaft 11b provided so as to integrally connect the other ends of the raising and lowering arms 11a, and a middle floor link receiver 14 rotatably attached to the horizontal shaft 11b. The link receiver 14 is attached to the top via an intermediate floor (not shown). The pair of high-low links 11, 11 project from a high-low free link 15 projecting at an intermediate position of the horizontal axis 11b of the high-low link 11 on the head side of the bed and a horizontal axis 11b of the high-low link 11 on the foot side. A high-low interlocking rod 17 provided so as to connect between the protruding arm 16 and the high-low link 11, 11 in a direction in which the up-and-down arm 11a of the high-low link 11, 11 stands.
While simultaneously transmitting the power from the high-low activation unit 12, the head-side high-low link 11 is retracted by the high-low activation unit 12 to operate the up-and-down arm 11a in the falling direction, and the foot-side high-low link 11 is interlocked with the low-low link. Rod 1
In this configuration, the angular displacement is returned as an independent state from the movement of the reference numeral 7. The high-low interlocking rod 17 and the protruding arm 16 of the horizontal axis 11b of the foot-side high-low link 11 are
It is movably connected to a long hole 19 provided in the high-low interlocking rod 17 via a connection shaft 18 provided at the tip end of the protruding arm 16 so as to penetrate in parallel to the axial direction of the horizontal shaft 11b.

The high / low starting portion 12 has a crank handle 20 and a starting arm 21 which is moved forward and backward in the axial direction by the crank handle 20. The distal end of the starting arm 21 is connected to the high / low free link 15. Like that. The high / low free link 15 has a pair of mounting tops 22, 22 so that the high / low interlocking rod 17 and the activation arm 21 of the high / low activation unit 12 can be connected in the axial direction of the bed longitudinal side and in a parallel state. I have.

In the lifting mechanism 10 for the floor of a bed or the like configured as described above, when the high-low link 11 on the foot side returns to the displaced position, it is connected to the foot side via the connecting shaft 18 on the tip end of the protruding arm 16. Is provided with an extension operation lever 23 for performing the extension operation by preventing the high-low link 11 from returning to the displaced state. This extension operation lever 2
Numeral 3 is rotatably fixed to the middle floor.
Locking portions 23a are provided on both ends of the connecting shaft 18 protruding from the upper portion in FIG.

On the other hand, the horizontal axis 1 of the high-low link 11 on the head side
The high-low free link 15 provided in 1b is provided with a link stopper 24 that constitutes a reverse extension mechanism that is laid so as to cover the outside of the high-low free link 15 (see FIG. 2). The link stopper 24 is a frame having a U-shaped cross section. A notch 25 is formed at the upper end toward the center, and a round bar 26 welded to the upper end so as to cross the notch 25. It has. The round bar 26 is provided with a stopper 27 which can be engaged and disengaged.
reference). The stopper 27 is attached to a U-shaped reverse extension / expansion operation lever 28 that is rotatably attached to the middle floor so as to be oriented in the floor width direction.

The extension / reverse extension mechanism in the bed or the like according to the present invention is configured as described above. Next, the operation thereof will be described. When the normal lifting and lowering of the floor portion is performed, the engaging portion 23a of the extension operation lever 23 is connected to the connecting shaft 1 of the protruding arm 16 of the horizontal shaft 11b of the high-low link 11 on the foot side.
8 while the stopper 27 of the reverse extension / expansion operation lever 28 is detached from the round bar 26 of the link stopper 24 outside the high-low free link 15, and the crank handle 2 of the high-low starting portion 12 is removed.
0 is operated. When raising the floor, that is, the activation arm 21 in the high / low activation unit 12 is extended. As a result, both the high-low links 11 are displaced by the high-low interlocking rod 17 at the same angle. Conversely, when lowering the floor, the activation arm 21 is moved backward. As a result, the foot-side high-low link 11 is in a free state independent of the high-low interlocking rod 17, and is displaced by the same angle as the head-side high-low link 11. In this way,
The floor can be adjusted up and down in a horizontal state.

Next, to adjust the floor so that the head side of the floor is lowered, as shown in FIG. 3, the connecting shaft 18 of the protruding arm 16 of the horizontal shaft 11b of the high-low link 11 on the foot side is extended. By operating the lever 23, the locking portion 23 of the extension operation lever 23
By engaging the a, the advance leg side HiLo link 11 <br/> restrained, by operating the crank handle 20 in the high-low activation unit 12, is retracted actuating the activation arm 21.
Here, the protruding arm 1 of the horizontal axis 11b of the foot side high-low link 11
6 is provided on the high-low interlocking rod 17.
Since it is freely movable in the elongated hole 19, the high-low interlocking rod 17 is temporarily displaced rightward in the drawing, and the high-low link 11 on the foot side is in a state independent of the high-low interlocking rod 17 and clockwise in the drawing. However, since the foot-side high-low link 11 is held by the locking portion 23a of the extension operation lever 23, the foot-side high-low link 11 maintains the state. When the high / low free link 15 is pulled by the arm 21, the link is displaced clockwise, and the floor on the head side is lower than that on the foot side. As a result, the floor is in an extended state.

On the other hand, in order to lower the foot side of the floor, the reverse extension / expansion operation lever 28 rotatably mounted on the middle floor is operated as shown in FIG. The head-side high-low link 11 is restrained by engaging with the round bar 26 of the link stopper 24, while the connecting shaft 1 of the protruding arm 16 of the horizontal shaft 11b of the foot-side high-low link 11 is engaged.
From step 8, the locking portion 23a of the extension operation lever 23 is released to be in a free state, and the crank handle 20 of the high-low starting portion 12 is operated to cause the starting arm 21 to retreat. Then, the head-side high-low link 11 holds the link stopper 24, that is, the middle floor link receiver 14 at its height position by the stopper 27, and the activation arm 21
In the pull-in operation only HiLo universal link 15 Figure, the displaced clockwise (see FIG. 5), the foot end Ha
Connection of the horizontal link 11b of the arrow link 11 to the protruding arm 16
The shaft 18 is in the long hole 19 of the high-low interlocking rod 17.
In the floating state, the foot-side high / low link 11 is displaced downward without any support, and the floor portion on the foot side is lower than that on the head side. As a result, the floor portion is in the reversely extended state.

As described above, the extension / reverse extension is achieved by restraining or releasing the high / low links 11, 11 on the foot side and the head side by the extension / expansion operation lever 23 and the reverse extension / expansion operation lever 28. You can perform operations as you wish,
Since the operability is good, and the above-described lever is simply added to the well-known lifting mechanism, the structure can be prevented from becoming complicated, and the cost can be prevented from increasing.

[0014]

According to the present invention, the normal high-low mechanism is freely extended by selectively restraining / releasing the high-low link constituting the high-low mechanism by levers provided on the head side and the foot side. The extension / reverse extension / extension operation can be performed, and the structure can be prevented from being complicated, and a floor posture useful for treating a patient can be provided.

[0015]

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of an example of an extension / reverse extension mechanism in a bed or the like according to the present invention.

FIG. 2 is an enlarged perspective explanatory view of a high-low free link and a stopper for restraining / releasing a head side high-low link by a reverse extension operation lever in the extension / reverse extension mechanism shown in FIG. 1;

FIG. 3 shows a state in which a floor portion is in an expanded state by operating an expansion / reverse expansion mechanism in a bed or the like according to the present invention.
It is a principal part mechanism explanatory drawing.

FIG. 4 is a main part mechanism explanatory view showing a state in which a floor portion is in a reversely stretched state by operating a spread / reverse stretch mechanism in a bed or the like according to the present invention.

FIG. 5 is a schematic side view of the high / low free link and the stopper shown in FIG. 4;

FIG. 6 is a schematic explanatory view showing a switching device which is one means for stretching in the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Elevating mechanism 11 High-low link 11a Undulating arm 11b Horizontal axis 12 High-low starting part 13 Base frame side link receiver 14 Middle floor side link receiving 15 High-low free link 16 Protrusion arm 17 High-low interlocking rod 18 Connecting shaft 19 Slot 20 Crank handle 21 Starting Arm 22 Mounting top 23 Extension / expansion operation lever 23a Engagement part 24 Link stopper 25 Notch 26 Round bar 27 Stopper 28 Reverse extension / expansion operation lever

Claims (1)

(57) [Claims] 1. A lifting mechanism having a pair of high-low links for supporting a middle floor supporting a floor, and a raising and lowering mechanism configured to raise and lower the middle floor by displacing the pair of high-low links by the same angle by an activation means. In a bed or the like, the high-low link has a pair of undulating arms rotatably attached at one end to the base frame side, a horizontal axis provided to connect the other end of the undulating arm, and a horizontal axis. A high-low free link fixed to a horizontal axis of a head-side high-low link such as a bed, which has a middle floor link receiver rotatably mounted, and a protruding arm protruding from a horizontal axis of a foot-side high-low link. linked by Hi-Lo associated rod between, and is突腕in HiLo link the HiLo associated rod and the foot-side, high-low interlocking
The protruding arm in the high-low link on the foot side is inserted into the long hole provided in the rod
A state in which the connecting shaft penetrating the distal end is movably inserted
And simultaneously transmit the power from the activating means in a direction in which the up-and-down arms in the two high-low links stand up, and pull in the high-low link on the head side by the activating means to operate the up-and-down arms in a direction to fall down. In this case, the high-low link on the foot side is configured to be returned from the movement of the high-low interlocking rod at an equal angle as an independent state from the movement of the high-low interlocking rod, and when the high-low link on the foot side returns to the displacement, via the connecting shaft on the tip end of the protruding arm, An extension operation lever for performing an extension operation by preventing the high-low link on the foot from returning to the displacement position is provided, and the extension operation lever is locked so as to receive the connecting shaft in the protruding arm. While having a locking part to make
A high-low link provided on the horizontal axis of the high-low link on the head side is provided with a link stopper that constitutes a reverse extension mechanism that is laid outside the high-low link and is driven only in the direction in which the undulating arm stands. A reverse extension / retraction operating lever which can be disengaged from the stopper, and the connecting shaft of the protruding arm of the high / low link on the foot side is operated by operating the extension / operation lever to lock the engaging portion of the extension / operation lever. In the restrained state, the high-low link in the head-side high-low link is pulled in by the activation means and the raising / lowering arm is operated in the direction of falling down, thereby preventing the foot-side high-low link from returning to the displaced position. The lower part of the floor is lower than that of the foot side, it is in the extended state, the reverse extension operation lever is operated to hold the link stopper, while the high-low link on the head side is restrained,
With the extension operating lever removed from the connecting shaft at the protruding arm of the foot-side high-low link, the starting means pulls in the high-low free link in the head-side high-low link,
A spreading / reversing / stretching mechanism for a bed or the like, characterized in that the floor on the foot side is lower than that on the head and the floor is in a reversely extended state.