JPH11104186A - Extending/reverse-extending mechanism in bed or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to easily switch an extending mechanism to tilt the head side of the bottom of a bed, etc., lower to a reverse-extending mechanism to tilt the foot side of the bottom lower, by equipping a position stopper mechanism and a link stopper mechanism and switching the engaging conditions of both stopper mechanisms. SOLUTION: A high-low actuating part is actuated at extending use to elevate a main frame 13 through a high-low link 14 to make a bed part at the highest position. At that time, an operation lever of a position stopper mechanism is operated to engage the position stopper to restrict the high-low link 14. An operation lever of a link stopper mechanism is operated to restrict the high-low link 14 in the foot side against the main frame 13. The high-low actuating part is actuated in the reverse direction to make the bed part tilted so as to make the bed part lower than the head side to be brought into an extended condition. Next, in the reverse-extending use, the position stopper and the link stopper are brought in a free condition respectively and the high-low actuating part is actuated.

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.
Can be regarded as a therapeutically useful function because it allows a patient to assume an optimal position in accordance with the condition of the illness. In the case of such a mechanism, in the past, in the case of manual operation, the expanding operation was 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 main frame supporting a floor, and the pair of high-low links are formed at the same angle by a starting means. In a bed or the like having an elevating mechanism configured to adjust the main frame up and down by interlocking displacement, the high-low link includes a first arm and a first arm.
A second arm having a shorter dimension than the arm.
The distal end side of the arm is rotatably attached to the base frame side, while the distal end side of the second arm in each high-low link is operably connected via an interlocking rod, and the second arm in one high-low link is connected. At the connection point between the distal end of the second arm and the interlocking rod, the distal end of the second arm is connected to the interlocking rod so as to be able to play a predetermined stroke, and the distal end of the second arm is connected to the interlocking rod in one direction of the interlocking rod. A position stopper mechanism for constraining the movement in the axial direction, while the one high-low link is constrained to the main frame at a position on the main frame corresponding to the one high-low link. A link stopper mechanism, and the position stopper mechanism and the link stopper mechanism are selectively actuated, respectively, to link the one high-low link to an interlocking rod. In a state where the one high-low link is restrained / released with respect to the main frame in a state where the rod is restrained / released with respect to the axial movement in one direction of the rod, and the one high-low link is restrained / released with respect to the main frame, the two high-low links are activated by the action of the activation means. The mainframe is set in the extended state / reverse extended state by intermittently intermittently operating the synchronous operation of the main frame. In the above-described configuration, a long hole is formed in the interlocking rod at a connection point between the distal end side of the second arm and the interlocking rod in one of the high-low links, and the distal end side of the second arm is connected to the long hole through the coupling shaft. So that the position stopper mechanism can move freely.
In the elongated hole of the interlocking rod, there is provided a position stopper which is locked to the connecting shaft and restrains the high-low link with respect to the interlocking rod. While being rotatably mounted under the bias of the emitting means,
A locking portion that locks the connection shaft on the distal end side of the second arm so as to receive the connection shaft from below, and releases the position stopper from the connection shaft on the distal end side of the second arm; A position stopper operation lever for rotating operation to cause the one high-low link to be restrained by the position stopper mechanism with respect to the interlocking rod, and to be released from the main frame by the link stopper mechanism. In this state, the main frame is raised in a horizontal state by the activation means, the one high-low link is restrained with respect to the main frame by the link stopper mechanism, and the activation means is reversely activated to lower the main frame. The main frame can be set in the extended state. In addition, while the one high-low link is released from being restrained by the position stopper mechanism with respect to the interlocking rod, the main frame is lifted by the activation means in a state where the one high-low link is released from being restrained by the link stopper mechanism with respect to the main frame. Thus, the main frame can be set in the reversely extended state. Further, the link stopper mechanism has a link stopper rotatably attached to a protruding portion of the main frame, which is provided at a position corresponding to the one of the high-low links, under the bias of the resilient means, The link stopper has a locking recess formed at the tip thereof so as to be locked from above on a locking pin protruding at an intermediate position of the second arm of one of the high-low links, and the link stopper is formed. It is possible to adopt a configuration having a link stopper operation lever for turning operation to be detached from the locking pin in the middle of the second arm or locked so as to cover the locking pin.

[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. The bed 10 shown in FIG. 1 has a floor elevating mechanism 11. The lifting mechanism 11 has, on a base frame 12 of the bed 10, high-low links 14, 14 for supporting a main frame 13 supporting a floor (not shown) so as to be able to move up and down. The main frames 13 are moved up and down by moving the links 14, 14 at the same angle and interlockingly.

The high-low links 14 and 14 are each formed of a pair of first arms 14b and a first arm 1b projecting at right angles to a horizontal axis 14a oriented in the bed width direction.
4b, the second arm 14c is shorter than the second arm 14c. The first arm 14b of the high-low link 14 located on the head side of the high-low link 14,
Of the link receiver 1 fixed to the base frame 12 side
5, while the tip of the first arm 14b of the high-low link 14 located on the foot side is pivotally attached to the base frame 12 side.
5 is rotatably mounted on a swing link 16 having the same length. The tip of the second arm 14c in each of the high-low links 14, 14 is interlocked via a high-low interlocking rod 17, which is oriented in the longitudinal direction of the bed, and a position stopper mechanism 21, which constitutes an extension / reverse extension mechanism 20. The high-low links 14, 14 are connected so as to be able to move independently of each other. The main frame 1 is connected to a horizontal axis 14a of each of the high-low links 14, 14 via a support shaft 18, which is omitted.
3 is supported. Further, in the main frame 13, as will be described in detail later, on the lower surface side of the end located on the bed foot side, a high-low link 14 located on the foot side is restrained with respect to the main frame 13. A link stopper mechanism 22 constituting the extension / reverse extension mechanism 20 is provided.

The extension / reverse extension mechanism 20 will now be described. As described above, the extension / reverse extension mechanism 20 includes the position stopper mechanism 21 and the link stopper mechanism 22. First, as shown in FIG. 2, the position stopper mechanism 21 includes an elongated hole 23 formed near the end of the high-low interlocking rod 17.
, The second arm 14 movably connected via a connecting shaft 24.
At the end c, a position stopper 25 is provided which is locked to the connecting shaft 24 so as to restrain the high-low link 14 against the high-low interlocking rod 17. The position stopper 25 is rotatably attached to the end of the high-low interlocking rod 17 under the bias of a spring member 26. The position stopper 25 is connected to the connecting shaft 24 at the distal end of the second arm 14c.
Has a locking portion 25a for locking so as to be received from below. The position stopper mechanism 21 is provided with a position stopper operating lever 27 for rotating the position stopper 25 to be disengaged from the connection shaft 24 at the tip end side of the second arm 14c or locked to receive the connection shaft 24. have.

Next, the link stopper mechanism 22 will be described. That is, the link stopper mechanism 22 is configured as shown in FIG.
As shown in FIG. 7, a link stopper 30 rotatably mounted under the bias of a spring member 29 is provided on a protruding portion 28 protruding from a lower surface of an end portion located on the foot side of the main frame 13. I have. The link stopper 30 has a locking recess 30a formed at the tip thereof so as to lock the locking pin 31 projecting from the middle of the second arm 14c of the high-low link 14 so as to cover the locking pin 31 from above. . The link stopper mechanism 22 is a link stopper operating lever for rotating the link stopper 30 to be disengaged from the locking pin 31 in the middle of the second arm 14c or locked to cover the locking pin 31. 32.

The extension / extension of the bed 10 according to the present invention
The reverse extension mechanism 20 is configured as described above,
Next, the operation will be described. First, the spreading action will be described.
Activating the high-low activation section raises the main frame 13 to bring the floor to the highest position (see FIG. 4). At this time, the position stopper operation lever 2 of the position stopper mechanism 21
7, the connecting shaft 2 at the tip of the second arm 14c of the high-low link 14 in the long hole 23 of the high-low interlocking rod 17
4, the locking portion 25a of the position stopper 25 is locked,
The high / low link 14 is restrained by the high / low interlocking rod 17, and the link stopper 30 of the link stopper mechanism 22 is detached from the locking pin 31 in the middle of the second arm 14c to be in a free state (see FIG. 5). In this state, the high-low link 14 on both the head side and the foot side is simultaneously displaced by the same angle by the high-low interlocking rod 17, so that the main frame 13, that is, the floor is maintained in a horizontal state.
Can be raised.

Here, the link stopper operating lever 32 of the link stopper mechanism 22 is operated to move the link stopper 3
0 of the locking recess 30a and the locking pin 3 in the middle of the second arm 14c.
1 to restrain the high-low link 14 on the foot side with respect to the main frame 13. The high-low link 14 is also held in a restrained state by the position stopper 25 of the position stopper mechanism 21 with respect to the high-low interlocking rod 17 (see FIG. 6).

Then, the high / low starting section is started in the reverse direction to lower the main frame 13 (see FIG. 7). That is, the first arm 14 of the high-low link 14
Make b fall down. At this time, since the high-low link 14 on the foot is restrained by the link stopper 30 to the main frame 13 as described above, the high-low link 14 on the head is initially lowered as the head-low link 14 falls down to a certain angle. Is connected to the right in the figure, the connecting shaft 24 at the tip of the second arm 14c of the foot-side high-low link 14
Is separated from the locking portion 25a of the position stopper 25,
It moves to the left end side of the long hole 23 along 3 (see FIG. 8). At this time, the head-side high-low link 14 is in a state of being dynamically separated from the head-side high-low link 14, and the head-side high-low link 14 is further folded down so that the swing link 16
While displacing the floor, the floor is inclined so that the head side is lower,
It is in a stretched state.

Next, the reverse spreading action will be described. As shown in FIG. 9, when the floor, that is, the main frame 13 is in the lowest position, the position stopper operating lever 27 of the position stopper mechanism 21 is operated to move the position stopper 25 to the tip of the second arm 14 c of the high-low link 14. The high / low starting unit is activated by releasing the link shaft 24 from the connecting shaft 24 to the free state, and disengaging the link stopper 30 of the link stopper mechanism 22 from the locking pin 31 in the middle of the second arm 14c. Then, the high-low link 14 on the foot side is
Since the restraint is released for both the high-low interlocking rod 17 and the main frame 13, even if the head-side high-low link 14 is displaced and the first arm 14b is raised, The second arm 14c of the foot-side high-low link 14 is formed by the high-low interlocking rod 17 interlocking to the left in the drawing.
The connection shaft 24 at the front end of the head-only high-low link 14 only moves to the right end side of the long hole 23 along the long hole 23 (see FIG. 11). There is no interlock until the right end is reached. As a result, the high-low link 14 on the head side and the foot side are not synchronized, and only the main frame 13 on the head side and the floor are raised, and the floor is inclined, and the reverse development is performed. It is in the stretched state (see FIG. 10).

As described above, the foot-side high-low interlocking rod 1
7 and the extension / reverse extension mechanism 20 provided on the main frame 13, ie, the combination of the position stopper mechanism 21 and the link stopper mechanism 22, restrains / restricts the foot-side high / low link 14 to the high / low interlocking rod 17. By releasing, restraining to the main frame 13, or releasing the restraint, the stretching and reverse stretching can be performed as desired.
Moreover, the position stopper mechanism 21 and the link stopper mechanism 2
2 is provided close to the foot side of the bed so that operability is good. Further, since the above-mentioned lever is simply added to the well-known lifting mechanism, it is possible to avoid complication of the structure. And cost increase can be suppressed.

[0014]

According to the present invention, the normal hi-low mechanism is selectively operated by the expanding / reverse expanding mechanism provided on one side, so that one of the high-low links is connected to the high-low interlocking rod,
Or selectively constrain / unconstrain to the mainframe,
The stretching / reverse stretching operation can be performed freely, and the operability can be improved and the structure can be prevented from becoming complicated.

[0015]

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main part mechanism configuration showing an example of a bed provided with an extension / reverse extension mechanism according to the present invention.

FIG. 2 is an enlarged configuration explanatory view of a position stopper mechanism that constitutes the extension / reverse extension mechanism according to the present invention.

FIG. 3 is an enlarged configuration explanatory view of a link stopper mechanism constituting the extension / reverse extension mechanism according to the present invention.

FIG. 4 is an explanatory view of a main part mechanism configuration when a floor portion of the bed shown in FIG. 1 is brought to a highest position.

FIG. 5 shows an operation state of a position stopper mechanism constituting the extension / reverse extension mechanism in the bed in the state shown in FIG. 4;
It is an enlarged explanatory view.

FIG. 6 is an explanatory diagram of a main part mechanism configuration when the floor portion is set in an expanded state by operating an expansion / reverse expansion mechanism in the bed in the state shown in FIG. 4;

FIG. 7 is a main part mechanism explanatory view showing a state in which the floor portion is in the expanded state by operating the expansion / reverse expansion mechanism in the bed according to the present invention.

FIG. 8 is an enlarged explanatory view showing an operation state of an extension / reverse extension mechanism in the bed in the state shown in FIG. 7;

FIG. 9 shows the operation of the bed shown in FIG.
FIG. 8 is an explanatory view of a main part mechanism, showing a position stopper mechanism constituting an expansion / reverse expansion mechanism being operated.

FIG. 10 is a main part mechanism explanatory view showing a state where a floor portion is in a reversely stretched state by operating a spread / reverse stretch mechanism in the bed according to the present invention.

FIG. 11 shows a state in which the bed in the state shown in FIG.
FIG. 4 is an enlarged explanatory view showing an operation state of a reverse extension mechanism.

FIG. 12 is a schematic explanatory view showing a switching device which is one means for stretching in the related art.

[Explanation of symbols]

Reference Signs List 10 bed 11 elevating mechanism 12 base frame 13 main frame 14 high-low link 14a horizontal axis 14b first arm 14c second arm 15 link receiver 16 swing link 17 high-low interlocking rod 18 support shaft 20 extension / reverse extension mechanism 21 position stopper Mechanism 22 Link stopper mechanism 23 Slot 24 Connecting shaft 25 Position stopper 25a Locking parts 26, 29 Spring member 27 Position stopper operating lever 30 Link stopper 30a Locking recess 31 Lock pin 32 Link stopper operating lever

Claims (4)

[Claims] 1. A lifting mechanism having a pair of high-low links for supporting a main frame supporting a floor, and a raising and lowering mechanism configured to raise and lower the main frame by interlockingly displacing the pair of high-low links by an activation means. In a bed or the like, the high-low link has a first arm and a second arm having a dimension shorter than the first arm, and pivots the distal end side of the first arm toward the base frame. On the other hand, the distal end side of the second arm in each high-low link is operably connected via an interlocking rod, and at the connection point between the distal end side of the second arm and the interlocking rod in one high-low link, The distal end of the second arm is connected to the interlocking rod so as to be movable by a predetermined stroke, and the distal end of the second arm is connected to the interlocking rod to restrain the interlocking rod from moving in one axial direction. position While having a stopper mechanism, the main frame has a link stopper mechanism at a position corresponding to the one high-low link, so as to restrain the one high-low link with respect to the main frame,
The position stopper mechanism and the link stopper mechanism are selectively actuated, respectively, so that the one high-low link acts as an interlocking rod, thereby restraining / releasing the axial movement in one direction of the interlocking rod. In a state where one of the high-low links is restrained / released with respect to the main frame, the synchronous operation relationship between the two high-low links is interrupted by the action of the activation means, and the main frame is expanded / reverse expanded. An extension / reverse extension mechanism for a bed or the like, characterized in that: 2. An elongated hole is formed in the interlocking rod at a connection point between the distal end side of the second arm and the interlocking rod in the one hi-low link, and a connecting shaft is connected to the distal end side of the second arm in the elongated hole. The position stopper mechanism engages with a connection shaft in the elongated hole of the interlocking rod to restrain the high-low link with respect to the interlocking rod. The position stopper is rotatably attached to the end of the interlocking rod under the urging of the resilient means, and is locked so as to receive the connecting shaft on the distal end side of the second arm from below. A position stopper operation lever having a locking portion for pivotally operating the position stopper to be disengaged from the connection shaft on the distal end side of the second arm or locked to receive the connection shaft; High-low link, position stopper machine The main frame is lifted in a horizontal state by the activation means while being restrained by the link stopper mechanism and released from the main frame by the link stopper mechanism. The bed or the like according to claim 1, wherein the high-low link is restrained with respect to the main frame, and the main frame is lowered by lowering the main frame by activating the starting means in reverse. Extension / reverse extension mechanism. 3. The one high-low link is released from the interlocking rod by a position stopper mechanism.
3. The main frame is reversely extended by raising the main frame by an activation means in a state where the main frame is released from the constraint by the link stopper mechanism. An extension / reverse extension mechanism for the bed or the like described. 4. The link stopper mechanism includes a link stopper rotatably attached to a protruding portion of the main frame at a position corresponding to the one of the high-low links under the urging of a resilient means. The link stopper has at its tip a locking recess formed to lock onto a locking pin protruding at an intermediate position of the second arm of one of the high-low links so as to cover from above. 2. A link stopper operating lever for rotating the link stopper so as to be disengaged from the locking pin in the middle of the second arm or locked so as to cover the locking pin.
And a stretching / reverse stretching mechanism for a bed or the like according to any one of Items 3 to 3.