JPH0653086B2 - Bed up / down tilting mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a floor elevating and inclining mechanism capable of horizontally elevating and lowering the bed of a bed and inclining it in both widthwise directions, that is, rolling. is there.

(Prior Art) A conventional bed also has a floor elevating / inclining mechanism capable of horizontally elevating / lowering the floor and inclining to both sides in the width direction, that is, rolling. The respective functions, that is, the lifting function and the rolling function, are operated by drive sources such as electric motors, which are individually provided.

(Problems to be Solved by the Invention) When a drive source such as an electric motor is provided for each function, the number of drive systems increases, the required space increases, the weight increases, and the price increases. .

The present invention is intended to solve the above problems.

(Means for Solving the Problem) To explain the means for solving the above-mentioned problems, the bed elevating / lowering tilt mechanism of the bed according to the present invention includes a base frame 1 and a floor support frame 2 supported above the base frame 1. The first and second actuating shafts 3 on the left and right sides that extend in the longitudinal direction of the bed are configured in the base frame 1.
a, 3b and the drive shaft 4 on the center side are rotatably provided, and a support rail 5 in the width direction is provided.
The second and third drive arms 6a, 6b, 6c are provided in a protruding manner, and the first and second actuating shafts 3a, 3b are provided with interlocking arms 7 respectively.
a, 7b and operating arms 8a, 8b are projectingly provided, and the first operating shaft 3
The tip end portion of the first actuating arm 8a of a is the first push-up link 9
In addition to flexibly connecting one end of a, the other end of the first push-up link 9a is rotatably connected to the same side of the floor support frame 2 as the first operating shaft 3a, In the floor support frame 2, the other end of a second push-up link 9b, one end of which is rotatably connected to the same side as the second operating shaft 3b, is movably supported along the support rail 5. At the same time, the tip end portion of the second actuating arm 8b of the second actuating shaft 3b is rotatably connected to the intermediate portion of the second push-up link 9b, and the first and second drive arms 6a, 6b and The first and second drive links 12a and 12b are connected between the first and second interlocking arms 7a and 7b. One end of each of the drive links 12a and 12b pivots to the interlocking arms 7a and 7b. The drive arms 6a, 6 are connected to each other and formed with drive grooves 13a, 13b on the other end side.
The drive protrusion 14 engaging with the drive grooves 13a and 13b is provided at b.
a and 14b are provided, and these drive grooves 13a and 13b are
The actuating shaft 3 is arranged so that the actuating arms 8a and 8b are rotated and raised.
Drive links 12a and 12b for rotating a and 3b
Drive protrusions 14a of the drive arms 6a, 6b only in the moving direction of
14b, the base frame 1 is provided with engagement / disengagement means A for disengaging the drive grooves 13a, 13b of the respective drive links 12a, 12b with respect to the drive projections 14a, 14b. The drive means 15 is provided between the third drive arm 6c and the support member of the base frame 1.

In the above structure, the support rail 5 has a guide groove 10 formed therein, and a support protrusion provided at the other end of the second push-up link 9b is engaged with the guide groove 10 so as to be movable. Can be applied. Further, the contact support roller 11 may be provided at or near the connecting position of the first operating arm 8a and the first push-up link 9b.

Further, in the above-mentioned configuration, the engagement / disengagement means A moves the drive links 12a, 12b by the linear drive mechanism to engage the drive grooves 13a, 13b with the drive protrusions 14a, 14b of the drive arms 6a, 6b. It is possible to adopt a configuration in which the state of being matched and the state of not being engaged are shifted. Further, the driving means 1 described above
5 can be a motor driven screw shaft type telescopic drive rod.

Further, the drive shaft 4 is provided with a fourth drive arm 6d, and a spring 16 for urging the drive shaft 4 in the upward direction of the floor support frame 2 is provided between the fourth drive arm 6d and the base frame 1. be able to.

(Operation) First, as shown in FIGS. 2 and 3 (a), when the floor support frame 2 is in the horizontal lowest position, the engagement / disengagement means A (not shown in these figures) is used. Are operated to move the first and second drive links 12a and 12b to move the drive grooves 13a and 13b into the drive protrusions 14a and 14a of the first and second drive arms 6a and 6b. 14b, and the drive means 15 is operated in this state to rotate the drive shaft 4 clockwise by the third drive arm 6c in the figure, the first and second drive links 12a, 12b The first and second actuating shafts 3a and 3b rotate counterclockwise and clockwise, respectively, by moving to the right in the figure, respectively, so that the first and second actuating arms 8a and 8b simultaneously rotate. To rise.

As the operating arms 8a and 8b are rotated and raised as described above, one end of the first push-up link 9a and the intermediate part of the second push-up link 9b are moved along the turning loci of the respective operating arms 8a and 8b. ,
The second push-up link 9b is moved outward and upward respectively.
Since the other end portion of the floor support frame 2 moves along the support rail 5, the floor support frame 2 is raised in parallel by the first and second push-up links 9a and 9b as shown in FIGS. 2 (b) to (c). . When the drive means 15 is operated in the opposite direction and the drive shaft 4 is rotated in the opposite direction to the above, the floor support frame 2 descends in parallel by the operation opposite to the above. Then, the other end of the second push-up link 9b is
When the end point of the movement along the support rail 5 is reached, the second push-up link 9b is held in a predetermined position by the second operating arm 8b, and the first operating arm 8a is brought into contact with the contact support roller 11b. However, it abuts on the second push-up link 9 and is held at a predetermined position, whereby the floor support frame 2 reaches the lowest position in the parallel ascending / descending state shown in FIG. 2 (a).

Next, at this position, the engagement / disengagement means A is operated to engage only the drive groove 13a of the first drive link 12a on the left side of the drawing with the corresponding drive protrusion 14a of the first drive arm 6a. Then, in this state, the drive means 15 is operated in the same manner as described above, and the third drive arm 6c rotates the drive shaft 4 in the clockwise direction in the figure, so that the first drive link 12a causes the first operation shaft 3a to rotate. Only the arm rotates counterclockwise and the first actuating arm 8a turns upward, and the first push-up link 9a is actuated in the same manner as described above. On the other hand, since the second push-up link 9b is held at the lowest position as described above, only the left side of the floor support frame 2 in the figure is driven by the first push-up link 9a to move upward, As shown in (d), the right side inclines downward.

Next, in the state shown in FIG. 2 (a) described above, the engagement / disengagement means is operated so that only the drive groove 13b of the second drive link 12b on the right side of the drawing is moved to the corresponding second drive arm 6b. When the drive means 15 is operated in the state of engaging with the drive projection 14b of FIG. 3 and the drive shaft 4 is rotated clockwise by the third drive arm 6c in this state, the second drive link 12b is obtained.
As a result, only the second actuating shaft 3b is turned clockwise, the second actuating arm 8b is turned up, the second push-up link 9b is actuated in the same manner as described above, and the other end side is gradually supported by the support rail 5. Move to the right side in the figure along. On the other hand, since the first drive link 12a is in a free state with respect to the first drive arm 6a, it does not hold the actuating shaft 3a via the first interlocking arm 7a, and therefore the contact support roller 11 gradually descends along the second push-up link 9b as the second push-up link 9b moves to the right side in the figure, and finally comes into contact with an appropriate place of the base frame 1, for example, the upper side of the support rail 5. And is supported as the lowest position. By such an operation, as shown in FIG. 2 (e), only the right side of the floor support frame 2 is driven by the second push-up link 9b to move upward, and the left side in the figure is inclined downward.

The spring 1 for urging the drive shaft 4 in the upward direction of the floor support frame 2
If 6 is provided, the ability of the drive source such as an electric motor when the floor support frame 2 is raised can be reduced, and an impact preventing action when the floor support frame 2 is lowered can be added.

(Example) Next, the Example of this invention is described about figures.

FIG. 1 shows the floor elevating and tilting mechanism of the present invention with the floor plate supporting above the floor support frame 2 omitted, FIG. 2 (a),
(b), (c), (d) and (e) are explanatory views showing the configuration and operation of the main part with a part of the configuration omitted, and FIGS. 3 (a), (b), (c),
(d) and (e) show the configurations and operations omitted in FIGS. 2 (a), (b), (c), (d), and (e), respectively. In these drawings, reference numeral 1 is a base frame, and 2 is a floor support frame supported above the base frame. The floor plate supported above the floor support frame 2 is not shown. This floor board is appropriately divided into a plurality of pieces, for example, a back floor board, a waist floor board, and a foot floor board so as to be capable of undulating, or an integral structure for the whole body.

Thus, the base frame 1 is provided with the first and second left and right actuating shafts 3a and 3b extending in the longitudinal direction of the bed and the drive shaft 4 on the center side rotatably, and the supporting rails in the width direction. 5
To provide. The drive shaft 4 is provided with first, second, third and fourth drive arms 6a, 6b, 6c and 6d, and the first and second actuating shafts 3a and 3b are respectively provided. The interlocking arms 7a and 7b and the operating arms 8a and 8b are provided in a protruding manner. The tip of the first actuating arm 8a of the first actuating shaft 3a connects one end of the first push-up link 9a flexibly, and connects the other end of the first push-up link 9a to the floor. The support frame 2 is rotatably connected to the same side as the first operating shaft 3a. Further, in the floor support frame 2, the second operation shaft 3
The other end of the second push-up link 9b, one end of which is rotatably connected to the same side as b, is movably supported along the support rail 5, and the second operation shaft 3b has a second end. The distal end portion of the operating arm 8b is rotatably connected to the intermediate portion of the second push-up link 9b. A guide groove 10 is formed in the support rail 5, and the second push-up link 9b is formed in the guide groove 10.
It is configured to be movable by engaging a support protrusion provided at the other end of the. Then, the first operating arm 8a and the first push-up link 9
A contact support roller 11 is provided at or near the connecting position of a, and the contact support roller 11 is configured to contact the second push-up link 9b and the upper side of the support rail 5.

In addition, the first and second drive links 1 are provided between the first and second drive arms 6a and 6b and the first and second interlocking arms 7a and 7b, respectively.
2a and 12b are connected to each other, one end of each of the drive links 12a and 12b is rotatably connected to the interlocking arms 7a and 7b, and drive grooves 13a and 13b are formed at the other end of the drive links 12a and 12b. Drive grooves 13a, 1 are provided on the arms 6a, 6b.
3b are provided with drive protrusions 14a and 14b, and these drive grooves 13a and 13b are provided with the first and second actuating arms 8a and 8a.
The drive projections 14a and 14b are engaged only in the moving direction of the drive links 12a and 12b for rotating the actuating shafts 3a and 3b so as to rotate and raise 8b. The first interlocking arm 7a is configured below the first operating shaft 3a,
The direction in which the first drive arm 6a pulls the first interlocking arm 7a through the first drive link 12a is the direction in which the first actuating arm 8a is pivotally raised, and the second interlocking arm is also provided. 7b is configured above the second operation shaft 3b, and the direction in which the second drive arm 6b pushes the second interlocking arm 7b via the second drive link 12b is the second operation arm 8b.
Is configured to rotate and rise. Therefore, the drive protrusions 14a, 14b of the respective drive arms 6a, 6b are
The driving grooves 13a and 13b are engaged in the pulling and pushing directions of the a and 13b, respectively. Then, corresponding to the respective drive links 12a, 12b, the respective drive grooves 13a, 13b are provided with the drive protrusions 14a, 14b.
The base frame 1 is provided with engagement / disengagement means A that can be engaged / disengaged.
As shown in FIG. 4, the engagement / disengagement means A moves the drive links 12a, 12b by a linear drive mechanism, that is, moves in the vertical direction in the example of the drawing to drive the drive grooves 13a, 13b.
Is shifted to a state in which the drive projections 14a and 14b of the drive arms 6a and 6b are engaged and a state in which they are not engaged.
Such a linear drive mechanism may be configured to perform linear displacement using a solenoid as a drive source, a screw shaft type telescopic drive mechanism driven by a small motor, or a control cable mechanism. The figure shows a screw shaft type telescopic drive mechanism driven by a small motor. This embodiment and the structure using the control cable mechanism have an advantage that the operation sound is quieter than the mechanism using the solenoid described above.

A driving means 15 is provided between the third driving arm 6c and the supporting member of the base frame 1, and the driving means 15 is a screw shaft type telescopic driving rod driven by a motor, a hydraulic cylinder or a pneumatic cylinder. Can be applied. Also,
A tension coil spring 16 and a spring for urging the drive shaft 4 in the upward direction of the floor support frame 2 are provided between the fourth drive arm 6d and the base frame 1.

In the above configuration, first, as shown in FIG.
In a state where the floor support frame 2 is located at the lowest position in the horizontal state, the engaging / disengaging means A is operated to move the first and second drive links 12a, 12b to drive the drive grooves 13a, 1 thereof.
As shown in FIG. 3 (a), 3b is brought into a state of engaging with the drive protrusions 14a, 14b of the first and second drive arms 6a, 6b.

In this state, the driving means 15 is operated to operate the third driving arm 6c.
When the drive shaft 4 is rotated via the drive shafts 4, the drive protrusions 14a and 14b are respectively moved into the drive grooves 13a and 1b as shown in FIG. 3 (b).
3b is engaged with the right side step portion of each drive link 12
Move a and 12b to the right in the figure. Then, the first and second actuating shafts 3a and 3b respectively rotate counterclockwise and clockwise as shown in FIG. 3 (b) to FIG. 3c), so that the floor support frame 2 rises in parallel by the first and second push-up links 9a and 9b as shown in FIGS. 2 (b) to (c).

When the drive means 15 is operated in the opposite direction to rotate the drive shaft 4 in the opposite direction to the above, the floor support frame 2 descends in parallel by the operation opposite to the above. Then, when the other end of the second push-up link 9b reaches the end point of the movement along the support rail 5, the second push-up link 9b is held at a predetermined position by the second actuating arm 8b, Further, in the first operating arm 8a, the contact support roller 11 is held in a predetermined position by contacting the second push-up link 9b, and thus, the floor support frame 2 is set to the position shown in FIG.
It reaches the lowest position in the parallel ascending / descending state shown in (a).

Next, at this position, the engagement / disengagement means A is operated, and FIG.
As shown in (d), only the drive groove 13a of the first drive link 12a on the left side of the drawing is brought into a state of engaging with the corresponding drive protrusion 14a of the first drive arm 6a, and in this state, the drive is performed in the same manner as described above. When the means 15 is operated and the drive shaft 4 is rotated clockwise by the third drive arm 6c, only the first operation shaft 3a is rotated by the first drive link 12a and the first operation arm 8 is rotated.
Therefore, as described above, only the left side of the floor support frame 2 is driven by the first push-up link 9 to rise, and as shown in FIG. 2 (d), the right side of FIG. Incline as downward.

Next, in the state shown in FIG. 2 (a), the engagement / disengagement means is operated, and as shown in FIG. 3 (e), only the drive groove 13b of the second drive link 12b on the right side in the drawing is brought into correspondence. The second drive arm 6b is engaged with the drive protrusion 14b. In this state, when the drive means 15 is operated in the same manner as described above to rotate the drive shaft 4 by the third drive arm 6c, the second drive link 1
By 2b, only the second actuating shaft 3b is turned and the second actuating arm 8b is turned up. Therefore, as described above, only the right side of the floor support frame 2 in the drawing is moved by the second push-up link 9b. It is driven and rises, and the left side in the drawing is inclined downward.

In the above operation, when the fourth drive arm 6d is provided on the drive shaft 4 and the spring 16 for urging the floor support frame 2 in the ascending direction is provided by this, when the floor support frame 2 is raised. It is possible to reduce the capacity of the drive source and to add an impact preventing action at the time of lowering. As described above, in the present invention, the above-mentioned engaging / disengaging means includes a drive source such as an electric motor. The drive source is simply the first and second drive links 12a, 12 described above.
Since it suffices to move b, it is not necessary to resist a large load, and therefore a small capacity is sufficient. Therefore, there is little influence on the required space of the mechanism, the weight, and the price increase.

(Effects of the Invention) As described above, the present invention has both the function of vertically moving the floor horizontally and the function of inclining to both sides in the width direction, that is, the function of rolling, but these drive sources are combined. As a result, since the drive system is configured to be the minimum, there is an effect that the required space is small, the weight is light, and the price can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing the floor elevating and tilting mechanism of the present invention with the floor plate supporting above the floor support frame 2 omitted, and FIG.
(a), (b), (c), (d), and (e) are explanatory side views showing the configuration and operation of the main part with a part of the configuration omitted, and FIG. 3 (a),
(b), (c), (d), and (e) are respectively FIG. 2 (a), (b), (c),
FIG. 4 is an explanatory side view showing the configuration and operation omitted in (d) and (e), and FIG. 4 shows an example of the engagement / disengagement means. Reference numeral 1 ... Base frame, 2 ... Floor support frame, 3a, 3b ... Operating axis, 4 ... Drive axis, 5 ... Support rail, 6a, 6b,
6c, 6d ... drive arm, 7a, 7b ... interlocking arm, 8a,
8b ... Operating arm, 9a, 9b ... Pushup link, 10 ...
Guide grooves, 11 ... Contact support rollers, 12a, 12b ...
... Drive link, 13a, 13b ... Drive groove, 14a, 1
4b ... driving protrusion, 15 ... driving means, 16 ... spring,
A: A means for engaging and disengaging.

Claims (9)

[Claims] 1. A base frame and a floor support frame supported above the base frame. The base frame includes left and right first and second actuating shafts extending in the longitudinal direction of the bed, and a central side. The drive shaft is rotatably provided, and a support rail in the width direction is provided. The drive shaft is provided with first, second and third drive arms in a protruding manner, and the first and second operating shafts are provided. Respectively projecting an interlocking arm and an operating arm, and a tip end portion of the first operating arm of the first operating shaft flexibly connects one end portion of the first push-up link,
The other end of the first push-up link is rotatably connected to the floor support frame on the same side as the first operation shaft, and the second operation is performed on the floor support frame. While supporting the other end of the second push-up link, one end of which is rotatably connected to the same side as the shaft, along the support rail,
The distal end portion of the second actuating arm of the second actuating shaft is rotatably connected to the intermediate portion of the second push-up link,
The first drive link and the second drive link are connected between the second drive arm and the first and second interlocking arms, and one end of these drive links is rotatably connected to the interlocking arm. , A drive groove is formed on the other end side, and a drive projection that engages with the drive groove is provided on the drive arm, and these drive grooves rotate the operation shafts so that the respective operation arms rotate and rise. The drive projection of the drive arm is engaged only in the moving direction of the drive link for moving the drive link, and the drive groove of each drive link is detachable from the drive projection on the base frame. Provide a means to remove
A bed raising / lowering tilt mechanism for a bed, characterized in that drive means is provided between the third drive arm and the support member of the base frame. 2. A guide groove is formed in the support rail, and a support projection provided at the other end of the second push-up link is engaged with the guide groove so as to be movable. 1. The bed up / down tilting mechanism of 1 3. A bed raising and lowering tilting mechanism according to claim 1, wherein a contact support roller is provided at or near a connecting position of the first operating arm and the first push-up link. 4. The engagement / disengagement means has a structure in which a drive link is moved by a linear drive mechanism, and the drive groove thereof is changed into a state in which it is engaged with a drive protrusion of a drive arm and a state in which it is not engaged. The bed up-and-down tilting mechanism of the bed according to claim 1. 5. The bed up / down tilting mechanism according to claim 4, wherein the linear driving mechanism is configured to perform linear displacement by using a solenoid as a driving source. 6. The bed up / down tilting mechanism according to claim 4, wherein the linear driving mechanism is a screw shaft type telescopic driving mechanism driven by a small motor. 7. The bed up / down tilting mechanism for a bed according to claim 4, wherein the linear drive mechanism is constituted by a control cable mechanism. 8. A bed-up / down tilting mechanism for a bed according to claim 1, wherein the driving means is a motor-driven screw shaft type telescopic drive rod. 9. A fourth drive arm is provided on the drive shaft, and a spring is provided between the fourth drive arm and the base frame to urge the drive shaft in the upward direction of the floor support frame. The bed up / down tilting mechanism according to claim 1.