JPH0583256B2 - - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor raising/lowering mechanism having an emergency release means and a means for returning the floor to its lying position in an emergency, and a structure for mounting the same.

【0002】

[Prior Art] For example, in a bed equipped with a floor raising/lowering mechanism, if the patient's condition suddenly changes during the raising and lowering of the floor, the raising and lowering of the floor is interrupted and the floor is immediately returned to its original state. , it is necessary to administer first aid. In addition, if the floor raising/lowering mechanism having the emergency release means is electric, if it stops for some reason while raising the floor, return the floor to its original position and have it inspected and repaired. Must be done.

【0003】

[Problems to be Solved by the Invention] However, by its nature, the floor undulation mechanism has the function of slowly undulating the floor, and cannot return the floor to its original position at a rate exceeding the undulation speed of the floor. does not have
The current situation is that we are unable to fully respond to emergencies and emergencies. Furthermore, when a bed is provided with a plurality of mechanisms such as a leg raiser in addition to a back raiser, the installation position and installation means become extremely complicated, increasing the difficulty of assembly. The present invention has been made in order to solve such problems, and provides a floor raising/lowering mechanism having an emergency release means capable of quickly returning the floor to its lying position in an emergency or an emergency. The purpose is to

【0004】

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention disposes a starting part of a floor raising/lowering mechanism below the floor of a bed, etc., and this starting part is arranged in a housing. This system is equipped with a drive motor and a multi-thread screw shaft connected to the drive motor.The multi-thread screw is screwed into the multi-thread screw shaft, and a drive pipe is attached to the multi-thread female screw. The tip of the pipe is brought into contact with a rotary arm that can freely rotate around the drive shaft that passes through the housing, and
The drive shaft is provided with an actuating arm that comes into contact with the lower surface of the floor,
A locking recess that is elongated in the axial direction is formed in the drive pipe, and a stopper member is elastically locked in the locking recess by a spring member to restrain rotation of the drive pipe in the axial direction. It is characterized by providing. Further, in the present invention, a starting part of the floor raising/lowering mechanism is disposed below the floor of a bed, etc., and this starting part has a driving motor and a multi-thread screw shaft connected to the driving motor in the housing. A multi-thread screw is screwed into this multi-thread screw shaft, and a drive pipe with a rectangular external shape is attached to the multi-thread female screw.
The tip of the drive pipe is brought into contact with a drive shaft passing through the casing and a rotary arm that can freely rotate as a rotation shaft, and the drive shaft is provided with an operating arm that comes into contact with the lower surface of the floor. The device is characterized in that a manual operation mechanism is provided on the side surface in a direction perpendicular to the axial direction for contacting/releasing a rotation restraint plate that resiliently contacts and restrains the rotation of the drive pipe. . Further, in the present invention, a starting part of the floor raising/lowering mechanism is disposed below the floor of a bed, etc., and this starting part has a driving motor and a multi-thread screw shaft connected to the driving motor in the housing. A multi-thread screw is screwed into this multi-thread screw shaft, a drive pipe with a circular outer diameter is attached to the multi-thread female screw, and a drive shaft that passes through the housing is attached to the tip of this drive pipe. A rotating arm that can freely rotate as a rotating shaft is connected to the drive shaft via a relay member, and the drive shaft is provided with an operating arm that contacts the lower surface of the floor, and the drive pipe is engaged with an axially long arm. The present invention is characterized in that a groove is bored and a stopper member is provided in the locking groove to be elastically locked by a spring member to restrain rotation of the drive pipe in the axial direction. Further, the floor raising/lowering mechanism is a back raising mechanism or a leg raising mechanism, and a first one of the back raising mechanism and a leg raising mechanism is provided on the opposite side of the main frame of the bed.
A second receiving part is provided, the back raising mechanism is attached to the first receiving part via both ends of a drive shaft passing through the housing, and the leg raising mechanism is attached to the first receiving part through both ends of the drive shaft passing through the housing. It is attached to the receiving part via both ends of the drive shaft, and further, the casing of the back raising mechanism is penetrated and locked to the drive shaft of the leg raising mechanism, while the casing of the leg raising mechanism is attached to the driving shaft of the leg raising mechanism. It is characterized by penetrating and locking the drive shaft. Furthermore, a floor raising and lowering mechanism is provided in the bed, and the floor raising and lowering mechanism includes a base frame attached to the main frame, and a raising and lowering starting part having a drive rod that moves forward and backward in the axial direction from within the casing,
The base frame is configured such that high-low links are disposed near both ends in the longitudinal direction and are connected by interlocking rods, and the high-low links are interlocked by a drive rod of a lift starting unit, and the lift starting unit is attached to the housing with its back raised. It is characterized in that the mechanism and the drive shaft of the leg raising mechanism are passed through and held.

【0005】

[Operation] When the starting motor of the starting part is started to wake up the floor, the drive pipe extends in the axial direction, and the floor is raised via the rotating arm and the operating arm. At this time, for a multi-thread female screw with a larger lead than a normal screw, rotational force is generated by the load from the floor applied through the rotating arm and the actuating arm, causing it to retreat on the multi-thread screw shaft. However, since the stopper member is elastically locked in the locking recess of the drive pipe, the drive pipe does not rotate and moves in the axial direction as the multi-start screw shaft rotates. It continues to grow.

[0006] At that time, if some kind of failure occurs in the drive motor or the patient is in an emergency state, when the stopper member is operated to disengage from the locking recess, the drive pipe becomes free and many The thread screw begins to rotate due to the load applied from the floor to the drive pipe via the operating arm and the rotating arm, moves backward on the multi-thread screw shaft, and the floor returns to its original position. Become. In this case, the multi-thread female thread and the multi-thread thread shaft have a large lead, and are easily rotated and advanced by an external force in the axial direction, and have a high speed in the axial direction, and retreat quickly. Furthermore, when the floor falls down to the lower limit and the stopper member is released, the stopper member is again locked in the drive pipe locking recess and restrains the rotational movement of the drive pipe, and the floor is raised again. It will be possible to do so.

[0007] In addition, when a drive pipe with a rectangular external shape is used, the rotation of the drive pipe is restrained by a rotation restraint plate from the side of the drive pipe, so the drive pipe does not rotate and extends in the axial direction. It is possible to wake up the floor part through the rotating arm and operating arm.

[0008] In addition, when a drive pipe with a circular outer shape is used, when the drive pipe is started, the stopper member is elastically locked in the axially long locking groove by the spring member, and the drive pipe is stopped. Rotation in the axial direction is restricted.

[0009] When the above-mentioned floor undulating mechanism is attached to the bed, both ends of the drive shafts that penetrate and lock in the housing are attached to the main frame, while the drive shafts pass through each other and are held. Therefore, assembly is easy. Furthermore, when providing the floor lifting/lowering mechanism, the drive shaft of the floor lifting/lowering mechanism is held through the housing, so assembly is easy.

【0010】

[Example] Next, an example will be given of the floor undulation mechanism having an emergency release means according to the present invention.
The following description will be made with reference to the accompanying drawings. In FIG. 1, reference numeral 1 indicates a back raising mechanism 1, which is provided in the back raising mechanism 1, a bed, etc. (described later). That is, the back-lifting mechanism 1 has an activation section, which will be described later, built into the housing 2, and has a drive shaft 3 and an operating arm 4 that are dynamically connected to the activation section. Near both upper ends of the housing 2 are a through hole 5 for the drive shaft 3 and a holding lid 6.
A through hole 7 and a holding lid 8 for a drive shaft of another starting section, which will be described later, are provided. That is, as shown in FIG. 2a, the back lifting mechanism 1
A drive motor 10 constituting the starting section 9 and a multi-thread screw shaft 11 connected to the drive motor 10 are built into the housing 2 . This multi-thread screw shaft 11 is a double-thread or triple-thread screw with a large lead, and a multi-thread female screw 12 with the same lead is screwed into it, and a drive pipe 13 is attached to the multi-thread female screw 12. A rotating arm 14 having the drive shaft 3 as a rotating axis is in contact with the rotating arm 14 . The drive pipe 13 has a locking recess 1 which is elongated in the axial direction.
5 is formed, and a stopper member 17 is provided in this locking recess 15 to be resiliently locked by a flap member 16 (see FIG. 2b).

[0011] Next, an example of a bed to which the back raising mechanism 1 is assembled will be described below in detail (see FIG. 3). In the figure, the bed 20 includes, in addition to the back raising mechanism 1, a leg raising mechanism 21 and a floor lifting mechanism 22. Note that the leg raising mechanism 21 has the same structure as the back raising mechanism 1. The floor lifting mechanism 22 includes a base frame 23 that can be raised and lowered and a lifting starting section 24.

[0012] That is, the bed 20 includes a base frame 23, a main frame 25 that can be folded into two, a headboard 26 and a footboard 27, and a floorboard 28 that is divided into parts. Below the floor plate 28 and on the main frame 25, the back raising mechanism 1, the leg raising mechanism 21, and the raising/lowering starting part 24 of the floor raising/lowering mechanism 22 are attached.

[0013] The base frame 23 has high-low links 29 disposed near both ends in the longitudinal direction,
Interlocking rod 30 connecting these high-low links 29
The drive rod 31 of the lift starting section 24 is configured to be able to interlock with the drive rod 31. Further, the high-low link 29 is provided with a support member 32 for supporting the main frame 25. Incidentally, the base frame 23 can be applied with either casters or fixed legs. Furthermore, in addition to the base frame 23 as described above, ordinary individual leg members can be applied.

[0014] The main frame 25 has a hinge 33.
The receiving portions 34 of the back raising mechanism 1 and the leg raising mechanism 21 described above are provided on opposing sides of the pair of main frames 25.
35, and a locking metal fitting 36 for locking the support member 32 provided on the high-low link 29 of the base frame 23 is further provided.

[0015] The back raising mechanism 1 is attached to the receiving part 34 via a drive shaft 3 that passes through the housing 2, and the leg raising mechanism 21 is also attached to the receiving part 34 via a drive shaft 38 that passes through the housing 37. It is attached to the receiving part 35, and has a structure in which the housing 2 of the back lifting mechanism 1 is penetrated and locked to the drive shaft 38 of the leg lifting mechanism 21, and the housing 37 of one leg lifting mechanism 21 is also attached to the back lifting mechanism 21. It has a structure that is penetrated and retained by the drive shaft 3 of the lifting mechanism 1. The operating arm 4 of the back raising mechanism 1 contacts the lower surface of the back floor 28a constituting the floor plate 28, and the operating arm 39 of the leg raising mechanism 21 contacts the lower surface of the back floor 28a constituting the floor plate 28.
It is in contact with the connecting part 8c.

[0016] Further, the lift starting part 24 of the floor lifting mechanism 22 is held by passing the drive shaft 3 of the back raising mechanism 1 and the drive shaft 38 of the leg raising mechanism 21 through the housing 40. , the driving rod 31 is connected to the rotating arm 41 of the high-low link 29.

[0017] The floor raising/lowering mechanism 1 having an emergency release means according to the present invention and its mounting structure are constructed as described above, and the operation thereof will be described next. When the drive motor 10 is started to raise the floor plate 28, the drive pipe 13 extends in the axial direction, and the drive shaft 3 rotates via the rotating arm 14, so the back floor 28a is moved by the operating arm 4. (See Figure 4a). At this time, a rotational force is generated in the multi-thread female screw 12, which has a larger lead than a normal screw, but the stopper member 17 is elastically locked in the locking recess 15 of the drive pipe 13. (see FIG. 4b), the drive pipe 13 does not rotate and expands in the axial direction as the multi-start screw shaft 11 rotates.

[0018] At that time, the drive motor 10
If some kind of failure occurs in the device, or if the patient falls into an emergency situation, the stopper member 17 should be moved to the locking recess 15.
When operated to separate from the (see Figure 5b),
The drive pipe 13 becomes free and the multi-thread female thread 12
Since a load is applied from the floor plate 28 through the operating arm 4, the rotating arm 14, and the drive pipe 13, it begins to rotate and moves backward on the multi-thread screw shaft 11, and the floor plate 28 returns to its original position. (See Figure 5a). In this case, the multi-thread female thread 12
And the multi-thread screw shaft 11 has a large lead,
It moves forward while rotating easily due to external force from the axial direction, and quickly retreats. Incidentally, when the floor plate 28 is inverted to the lower limit and the stopper member 17 is released, the stopper member 17 will again engage the locking recess 1 of the drive pipe 13.
5, the rotation direction of the drive pipe 13 is restricted, and the floor plate 28 can be raised again.

[0019] Above, examples of the back raising mechanism 1, the leg raising mechanism 21, and the floor raising/lowering mechanism 22 that constitute the floor raising/lowering mechanism have been explained, but the back raising mechanism and the leg raising mechanism 21 have the following structure. It could be something like that. Components that are substantially the same as those of the back-raising mechanism 1 and the leg-raising mechanism 21 based on the embodiment described above are given the same reference numerals, and description thereof will be omitted.

[0020] That is, in the back raising mechanism 42 according to this embodiment, a drive pipe 43 having a rectangular outer shape is applied, and the rotating arm 1 is connected via a thrust bearing 44.
4 (see FIG. 6), and the drive pipe 4 is connected elastically to the side surface of the drive pipe 43 in a direction perpendicular to the axial direction on the outside of the housing 2.
A manual operation mechanism 46 is provided for contacting/releasing a rotation restraining plate 45 that restrains the rotation of the rotor 3. This manual operation mechanism 46 includes an operating shaft 47 and a spring member 48 attached to a rotation restraint plate 45, and a bearing portion 4 of the operating shaft 47 that protrudes from the outside of the housing 2.
9 and an operating knob 50 of the operating shaft 47 that engages with the bearing portion 49 (see FIG. 7a). The bearing portion 49 has a protruding surface 49 of the operating shaft 47 formed at an angle, and a surface 51 of the operating knob 50 that rubs against the projecting surface of the bearing portion 49 is similarly formed at an angle. By rotating the operation knob 50, the protruding surface 4
9 and the rubbing surface 51 are different from each other, and the operating shaft 4
7 is retracted against the action of the spring member 48, and the rotation restraining plate 45 is brought into contact with and removed from the side surface of the drive pipe 43 (see FIG. 7b).

[0021] According to the back raising mechanism 42, when activated to get up, the rotation of the drive pipe 43 is restrained by the rotation restraint plate 45 from the side of the drive pipe 43, so the drive pipe 43 is prevented from rotating. Zuni,
It extends in the axial direction, and the floor part 28 can be raised via the rotating arm 14 and the operating arm 4. In case of an emergency, the rotation restraint plate 45 can be separated from the side surface of the drive pipe 43 by rotating the operation knob 50, and the drive pipe 43 can be set in a free state (FIG. 8a,
(see Figure 8b).

[0022] Furthermore, the floor raising mechanism according to the present invention may have the following structure. That is, in this embodiment, the back raising mechanism 52 is
As shown in FIG. 9, the drive pipe 53 has a circular outer shape.
A rotary arm 14 is connected to the tip of the drive pipe 53 via a relay pipe 54, which is rotatable about the drive shaft 3 passing through the housing 2 as a rotation axis. An actuating arm 4 that comes into contact with the lower surface of the floor 28 is provided, and a locking groove 55 that is elongated in the axial direction is bored in the drive pipe 53.
A stopper member 57 is provided which elastically engages with a spring member 56 to restrain rotation of the drive pipe 53 in the axial direction (see FIG. 10a).

[0023] According to the back raising mechanism 52, when activated, the stopper member 57 is elastically locked in the locking groove portion 55 by the spring member 56, thereby preventing rotation of the drive pipe 53 in the axial direction. The floor part 28 can be raised via the rotating arm 14 and the actuating arm 4 in a restrained manner. In an emergency, the drive pipe 43 can be set free by operating the stopper member 57 (see FIG. 10b).

[0024] As mentioned above, although various structures have been mentioned and explained, in any case, the floor undulation mechanism is
0, both ends of the drive shafts 3, 37, which are penetrating and locked in the housings 2, 36, are attached to the main frame 25, while the drive shafts 3, 37 are attached to the main frame 25, respectively.
7 is passed through and held, so assembly is easy. Furthermore, when installing the floor raising/lowering mechanism 22, the driving shafts 3, 37 of the floor raising/lowering mechanism are passed through the housing 40 and held.
Easy to assemble.

【0025】

[Effects of the Invention] As described above, according to the present invention,
In an emergency or an emergency, the floorboard can be quickly returned to its original position, making it possible to adequately deal with emergencies that occur during back raising. Moreover, since the multi-thread screw shaft is rotated and retracted at a controlled speed, the floor part is prevented from returning due to impact, and a sufficient function is achieved in terms of safety. In addition, when installing the floor raising/lowering mechanism on the bed, both ends of the drive shafts that penetrate and lock in the housing are attached to the main frame, while the drive shafts are held through each other, so assembly is easy. It's convenient.

【0026】

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a floor raising/lowering mechanism having an emergency release means according to the present invention.

2a is an explanatory diagram showing the internal structure of the floor undulating mechanism shown in FIG. 1. FIG.

FIG. 2b is a cross-sectional explanatory diagram of the floor undulation mechanism shown in FIG. 2a.

FIG. 3 is an exploded perspective explanatory view showing the structure of a bed to which a floor plate raising/lowering mechanism having an emergency release means according to the present invention is installed.

4a is an explanatory diagram of the operation of the floor plate undulation mechanism shown in FIGS. 1 to 3. FIG.

FIG. 4b is an explanatory view of the action of the stopper member when raising the back shown in FIG. 4a.

5a is an explanatory diagram of the operation of the floor plate undulating mechanism shown in FIGS. 1 to 3. FIG.

FIG. 5b is an explanatory diagram of the action of the stopper member shown in FIG. 5a at the time of emergency release.

FIG. 6 is an explanatory view of the internal structure of another embodiment of the floor raising/lowering mechanism having an emergency release means according to the present invention.

7a is a cross-sectional explanatory diagram of the manual operation mechanism shown in FIG. 6. FIG.

FIG. 7b is an external perspective view of the operating knob of the manual operating mechanism shown in FIG. 7a.

FIG. 8a is an explanatory diagram of the operation of the manual operation mechanism shown in FIG. 7a at the time of emergency release.

FIG. 8b is an external perspective view of the operating knob of the manual operating mechanism shown in FIG. 8a.

FIG. 9 is an explanatory view of the internal structure of yet another embodiment of the floor undulation mechanism having an emergency release means according to the present invention.

10a is a cross-sectional explanatory view of the stopper member shown in FIG. 9. FIG.

10b is an explanatory diagram of the action of the stopper member shown in FIG. 9 at the time of emergency release.

[Explanation of symbols] 1,42,52 Back lift mechanism 2,37,40 Housing 3,38 Drive shaft 4 Working arm 5,7 Penetration 6,8 Holding lid 9 Starting part 10 Drive motor 11 Multi-thread screw shaft 12 Multi-start female thread 13,43,53 Drive pipe 14,41 Rotating arm 15 Locking recess 16,48,56 Spring member 17,57 Stopper member 20 bed 21 Leg lifting mechanism 22 Floor lifting mechanism 23 Base frame 24 Lifting starting section 25 Mainframe 26 Headboard 27 Footboard 28 Floorboard 29 High-low link 30 Interlocking rod 31 Drive rod 32 Support member 33 Hinge 34, 35 Receiving part 36 Locking metal fittings 39 Working arm 44 Thrust bearing 45 Rotation restraint plate 46 Manual operation mechanism 47 Operating axis 49 Bearing part 50 Operation knob 51 Rubbing surface 54 Relay pipe 55 Locking groove.

Claims (5)

[Claims] Claim 1: A starting part of a floor raising/lowering mechanism is disposed below a floor of a bed, etc., and this starting part is inside a housing.
It is equipped with a drive motor and a multi-thread screw shaft connected to the drive motor.A multi-thread female thread is screwed into this multi-thread screw shaft, and a drive pipe is attached to the multi-thread female thread. A rotary arm that is rotatable about a drive shaft passing through the casing is brought into contact with the tip of the drive pipe, and an actuating arm that comes into contact with the lower surface of the floor is provided on the drive shaft, A locking recess that is elongated in the axial direction is formed, and a stopper member is provided in the locking recess that elastically locks with a spring member to restrain rotation of the drive pipe in the axial direction. A floor raising mechanism with an emergency release means. Claim 2: A starting part of the floor raising/lowering mechanism is disposed below the floor of the bed, etc., and the starting part is inside the housing.
It is equipped with a drive motor and a multi-thread threaded shaft connected to the drive motor, and a multi-thread female thread is screwed into the multi-thread thread shaft, and a drive pipe with a rectangular external shape is connected to the multi-thread female thread. , and the tip of the drive pipe is brought into contact with a drive shaft that passes through the housing, and a rotary arm that can freely rotate as a rotation shaft, and an actuation arm that comes into contact with the lower surface of the floor is provided on the drive shaft, The invention is characterized in that a manual operation mechanism is provided on the side surface of the drive pipe for contacting/releasing a rotational restraint plate that elastically contacts the drive pipe in a direction perpendicular to the axial direction and restrains rotation of the drive pipe. Floor raising mechanism with emergency release means. Claim 3: A starting part of the floor raising/lowering mechanism is disposed below the floor of the bed, etc., and the starting part is inside the housing.
It is equipped with a drive motor and a multi-thread screw shaft connected to the drive motor, and the multi-thread screw is screwed into the multi-thread screw shaft, and a drive pipe with a circular outer diameter is connected to the multi-thread female screw. At the tip of the drive pipe, a drive shaft passing through the housing and a rotating arm that can freely rotate as a rotating shaft are connected via a relay member, and an operating arm that contacts the drive shaft with the lower surface of the floor. and a locking groove that is elongated in the axial direction is bored in the drive pipe, and is elastically locked in the locking groove by a spring member to restrain rotation of the drive pipe in the axial direction. What is claimed is: 1. A floor raising/lowering mechanism having an emergency release means, characterized in that a stopper member is provided. 4. The floor raising/lowering mechanism according to claims 1 to 3 is a back raising mechanism or a leg raising mechanism, and the first and second legs of the back raising mechanism and the leg raising mechanism are provided on opposite sides of the main frame of the bed. The back raising mechanism is attached to the first receiving part via both ends of a drive shaft passing through the housing, and the leg raising mechanism is attached to the first receiving part via both ends of a drive shaft passing through the housing. is attached to the receiving part via both ends of the back-raising mechanism, and the housing of the back-raising mechanism is penetratingly locked to the drive shaft of the leg-raising mechanism, while the housing of the leg-raising mechanism is attached to the driving shaft of the back-raising mechanism. A mounting structure for a floor raising/lowering mechanism in a bed, etc., characterized by penetrating and locking the mechanism. 5. The bed according to claim 4 is provided with a floor lifting mechanism, the floor lifting mechanism comprising: a base frame attached to the main frame; and a lifting actuator having a drive rod that moves forward and backward in the axial direction from within the casing. The base frame is configured such that high-low links are arranged near both ends in the longitudinal direction and connected by interlocking rods, and the high-low links are interlocked by the drive rod of the lift starting section, and the lifting starting section is connected to the housing. A mounting structure for a floor raising/lowering mechanism in a bed, etc., characterized in that the drive shafts of a back raising mechanism and a leg raising mechanism are passed through and held therein.