JP3575690B2 - Base height adjustment mechanism for furniture - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a base height adjustment mechanism for furniture, that is, various beds and indoor fixtures, which has a simple mechanism, can reduce a load on a driving source, and has a base lifting speed fluctuation. The present invention relates to a base height adjustment mechanism for a fixture, which can reduce the height of the base.
[0002]
[Prior art]
In recent years, more and more beds equipped with a lift function for adjusting the height of the bottom as well as a gatch function (a function for raising the back and raising the legs).
For example, the present applicant has commercialized a bed 1 as shown in FIGS. The bed 1 has an elevating mechanism 2 for adjusting the height of the bottom. In this elevating mechanism 2, an up-and-down leg member 4 movably mounted via a guide roller R to a guide frame G provided along the frame 3. The intermediate portion of the undulating leg member 4 and both ends of the frame 3 are connected by auxiliary stays 5 to assist the operation of the undulating leg member 4.
Female screw members 6 and 6 are attached to the portions close to the upper ends of the undulating leg members 4, and screw shafts 7 and 7 are screwed into the female screw members 6 and 6, respectively. 7, a motor 8 is connected, and these screw shafts 7, 7 are connected via an interlocking rod 9 so as to be interlockable.
[0003]
[Problems to be solved by the invention]
In the lifting mechanism 2, when the frame 3, that is, the position of the bottom B is in a low state, and when the bottom B is raised, the mounting position of the auxiliary stay 5 in the frame 3 and the vicinity of the upper end of the undulating leg member 4 In order to reduce the distance L between the two points, the motor 8 is started and the female screw member 6 is drawn toward the motor 8 side. When θ is small, a large thrust is required, and it is necessary to use a tension spring S as an auxiliary means at the mounting position of the auxiliary stay 5 on the frame 3 and near the upper end of the undulating leg member 4.
In addition, the motor 8 is started and turned to the motor 8 side so as to reduce the distance L between two points between the mounting position of the auxiliary stay 5 on the frame 3 and the vicinity of the upper end of the undulating leg member 4 at a constant speed. When the screw member 6 is drawn, the rate of change of the height H, that is, the rising speed changes in the relationship of Csin θ (however, C: length of the up-and-down leg member 4, θ: inclination angle of the up-and-down leg member 4). That is, the speed of the height H fluctuates such that the speed at the beginning of the rise is large, and at the end of the rise, the rise speed decreases.
The present invention has been proposed in view of the above background, furniture, that is, various beds, a base height adjustment mechanism in indoor equipment and the like, the mechanism is simple, the drive source It is an object of the present invention to provide a base height adjustment mechanism for a fixture, which can reduce the load on the floor and can suppress the fluctuation of the bottom elevation speed.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention, in claim 1, guide members are provided on the base of the furniture toward both ends, and the upper ends are movably mounted on these guide members. A regulating arm shorter than the undulating leg member rotatably connected between an intermediate portion of the undulating leg member and both ends of the base; and a lower end of the undulating leg member. A guide link provided along the up-and-down leg member at a position close to the guide member, one end of which is movably mounted, and the other end of the guide member is rotatably connected to the regulating arm; An interval adjustment mechanism is interposed between the upper end of the auxiliary link and one end of the auxiliary link, and the interval between the upper end of the undulating leg member and one end of the auxiliary link is adjusted by the interval adjustment mechanism. Thus, the upper end side of the undulating leg member and the auxiliary The fixture is configured to move one end side of the base along the guide members of the base and the undulating leg members, respectively, and to displace the angle between the undulating leg members and the regulating arms to adjust the height of the base. A base height adjustment mechanism is disclosed.
According to the present invention, in the second aspect, the furniture is a bed, and the upper and lower sides are movably mounted on guide members provided along the longitudinal direction of the frame on the head side and the foot side of the frame in the bed. Having a leg member, between the intermediate portion of the undulating leg member and both ends of the frame, connecting a regulating arm shorter than the undulating leg member, at a position near the lower end of the undulating leg member, One end is movably mounted on a guide member provided along the undulating leg member, while the other end has an auxiliary link rotatably connected to the regulating arm, and an upper end side of the undulating leg member, A base height adjusting mechanism in a fixture having an interval adjusting mechanism interposed between one end of the auxiliary link and a space between the two ends is disclosed.
Furthermore, in the present invention, in claim 3, the distance adjusting mechanism is a direct drive mechanism having a motor and a starting shaft driven forward and backward by the motor, wherein the motor side and the starting shaft side are connected to the hoisting leg. A base height adjustment in a fixture, which is attached to the upper end of the member and one end of the auxiliary link, and moves both the upper end of the undulating leg member and one end of the auxiliary link along the respective guide members. A mechanism is disclosed.
[0005]
According to the first aspect, when the interval adjusting mechanism is activated, the upper end side of the undulating leg member and the one end side of the auxiliary link move along the guide members on the base and the undulating leg member, respectively. The distance between the upper end side of the leg member and the one end side of the auxiliary link can be adjusted to expand or contract, and the angle between the up-and-down leg member and the regulating arm can be displaced to adjust the height of the base.
[0006]
According to claim 2, when the interval adjusting mechanism is activated, the upper end side of the undulating leg member and the one end side of the auxiliary link move along the guide member of the frame and the undulating leg member, respectively. The distance between the upper end of the member and the one end of the auxiliary link is adjusted, and the angle between the undulating leg member and the regulating arm is displaced to raise and lower the frame vertically, thereby adjusting the height of the frame. it can.
[0007]
According to the third aspect, when the linear drive mechanism is activated and the activation shaft is driven forward and backward at a constant speed, the upper end side of the up-and-down leg member and one end side of the auxiliary link move along the respective guide members. By doing so, the distance between the upper end side of the undulating leg member and one end side of the auxiliary link is adjusted, and the angle between the undulating leg member and the regulating arm is displaced to adjust the height of the frame. Can be.
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Next, a base height adjusting mechanism in a fixture according to the present invention will be described with reference to the accompanying drawings, showing one embodiment adopted for a bed.
FIG. 1 shows a lifting mechanism 11 in a bed 10. The elevating mechanism 11 can move the upper end side to a guide member formed along the longitudinal direction of the main frame 12, that is, a guide frame 13 on the head side and the foot side of the middle floor 12 (main frame 12) of the bed 10. Has an up-and-down leg member 14 attached thereto.
The intermediate portion of the undulating leg member 14 and both end portions of the main frame 12 are connected by regulating arms 15 which are shorter than the undulating leg member 14.
At a position near the lower end of the undulating leg member 14, one end is movably mounted on a guide frame 16 provided along the undulating leg member 14, and the other end is rotatably mounted on the regulating arm 15. It has an auxiliary link 17 connected thereto.
As shown in FIG. 2, a linear drive mechanism 18 is provided between the upper end side of the up-and-down leg member 14 and one end side of the auxiliary link 17, and the linear drive mechanism 18 causes the up-and-down leg member 14 to move. By adjusting the distance between the upper end of the auxiliary link 17 and one end of the auxiliary link 17, the upper end of the undulating leg member 14 and the one end of the auxiliary link 17 are respectively connected to the main frame 12 and the undulating leg member. The height of the main frame 12 is adjusted by moving along the guide frames 13 and 16 at 14 and displacing the angle (ψ) between the undulating leg member 14 and the regulating arm 15.
[0009]
The undulating leg member 14 is a frame formed by connecting a pair of long members on the base end side and the upper end side by a base end horizontal axis 14a and an upper end side horizontal axis 14b, respectively, and has a square shape. Leg seats 19 are provided at both ends of the base-side horizontal shaft 14a.
On the other hand, guide rollers 20 are attached to both ends of the upper horizontal shaft 14b, and the guide rollers 20 are movably mounted on the guide frame 13 of the main frame 12 (see FIG. 3). A guide frame 16 is provided at a position near the base horizontal shaft 14a of the undulating leg member 14, and the lower end of the auxiliary link 17 is movably mounted along the guide frame 16 via a guide roller (described later). are doing.
[0010]
The regulating arm 15 is configured such that ends thereof are rotatably connected between an intermediate portion (connection shaft P) of the undulating leg member 14 and an end portion side of the main frame 12, and the undulating leg member is provided. The upper end side of the auxiliary link 17 is rotatably attached to a position near the connection shaft P in the intermediate portion of the fourteenth embodiment.
[0011]
The auxiliary link 17 is formed in a U-shape by connecting a pair of one end sides by a horizontal shaft 17a. A rotating horizontal shaft 17b is rotatably attached to the other end of the auxiliary link 17 via a guide roller 21 for making the guide frame 16 of the undulating leg member 14 movable.
Further, both ends of the horizontal shaft 17a are rotatably mounted on a mounting portion 22 at a position close to the connection axis P of the undulating leg member 14.
[0012]
The linear drive mechanism 18 is interposed between the upper horizontal shaft 14 b of the up-and-down leg member 14 and the horizontal rotary shaft 17 b of the auxiliary link 17.
That is, the linear drive mechanism 18 has a motor casing 18a held on the upper end side horizontal shaft 14b of the up-and-down leg member 14 by the mounting member 23, and a starting shaft 18b that is driven forward and backward in the axial direction from the motor casing 18a. The tip of the shaft 18b is attached to the rotation horizontal shaft 17b of the auxiliary link 17.
[0013]
As described above, the elevating mechanism 11 in the bed 10 is configured, and the operation thereof will be described next.
When the main frame 12 supporting the bottom of the bed 10 is at the minimum height (see the solid line in the right half in FIG. 1), the starting shaft 18b of the direct drive mechanism 18 is moved to the motor casing 18a side to raise the bottom. Then, it is driven to retreat in the axial direction.
That is, by moving the starting shaft 18b of the linear motion drive mechanism 18 in the axial direction toward the motor casing 18a, the starting member 18 of the motor casing 18a on the upper horizontal shaft 14b of the up-and-down leg member 14 is moved from the mounting member 23. The distance between the rotation horizontal shafts 17b of the auxiliary link 17, which is the mounting point at the tip of the starting shaft 18b, decreases. At this time, the rotation horizontal shaft 17b of the auxiliary link 17 moves the guide frame 16 of the undulating leg member 14 toward the center of the undulating leg member 14 via the guide roller 21 (see FIG. 4).
[0014]
On the other hand, the upper end side horizontal shaft 14b of the undulating leg member 14 to which the motor casing 18a is attached via the attachment 23 is movably mounted on the guide frame 13 of the main frame 12 via the guide roller 20. Also on the motor casing 18a side, the upper end side horizontal shaft 14b of the undulating leg member 14 gradually moves along the guide frame 13 of the main frame 12 due to the reaction force due to the force drawn into the starting shaft 18b side.
[0015]
Then, the mounting end of the intermediate portion of the up-and-down leg member 14 on the connecting shaft P, which is the mounting position of the regulating arm 15, receives a force toward the end of the main frame 12, while the regulating arm 15 is Since the link 17 receives a force in the direction toward the upper end of the auxiliary link 17, the regulating arm 15 is displaced by these external forces in a direction in which the included angle (ψ) centering on the middle portion of the up-and-down leg member 14 is increased. The main frame 12 rises (see FIG. 5).
[0016]
As described above, when the linear drive mechanism 18 is activated, since both the mounting side of the motor casing 18a and the distal end side of the activation shaft 18b are moved, at least the load associated with the activation is reduced by the activation shaft 18b and the motor. Since it is distributed to the casing 18a side, the load on the motor at the beginning of the start can be greatly reduced, and the height of the main frame 12 can be reduced by the angle between the undulating leg member 14 and the regulating arm 15 (１５ ), That is, the distance D between the mounting bracket 23 of the motor casing 18a on the upper horizontal shaft 14b of the undulating leg member 14 and the rotation horizontal shaft 17b of the auxiliary link 17, which is the mounting position of the tip of the starting shaft 18b. Therefore, if the moving speed of the starting shaft 18b of the linear drive mechanism 18 is constant, the main frame 12 is moved up and down at a substantially constant speed. It is possible.
[0017]
Here, for reference, FIG. 6 illustrates operating characteristics of the lifting mechanism 11 of the present invention and the lifting mechanism 2 shown in FIGS. 7 and 8.
As will be understood from the drawings, in the elevating mechanism 2 shown in FIGS. 7 and 8, the axial force applied to the motor is extremely large at the beginning of startup, and the axial force applied to the motor is high even when assisted by the extension spring S as the auxiliary means. This indicates that a motor having a high output capability must be employed.
On the other hand, in the elevating mechanism 11 according to the present invention, even if the auxiliary means is not provided, the load at the time of starting does not become extremely high, and it can be seen that the fluctuation of the axial force is smaller.
[0018]
As described above, the base height adjusting mechanism in the furniture according to the present invention has been shown and described in one embodiment adopted in a bed, but the base height adjusting mechanism is used for other well-known indoor furniture and the like. Of course, it can be used for furniture.
[0019]
【The invention's effect】
As described above, according to the present invention, an extremely large thrust is not required during operation (beginning of operation). Also, regardless of the height of the base, it is possible to move up and down with a relatively small thrust with little fluctuation.
As with the previous mechanism, the base only moves up and down in the vertical direction, does not move in the horizontal direction, and even if it is installed close to the wall, it may hit the wall and damage the wall etc. There is no. Furthermore, since the space under the base can be secured, the cleaning property is good.
[0020]
[Brief description of the drawings]
FIG. 1 is a side elevational view of a main part showing an operation state at a minimum position and a maximum position in a bed elevating mechanism employing a base height adjusting mechanism in a furniture according to the present invention.
FIG. 2 is a plan view of the lifting mechanism shown in FIG.
FIG. 3 is a schematic perspective view of the lifting mechanism shown in FIG.
FIG. 4 is an explanatory diagram of an operation of a lifting mechanism in a bed or the like shown in FIG. 1;
FIG. 5 is an explanatory diagram of an operation of a lifting mechanism in a bed or the like shown in FIG. 1;
6 is a graph showing operation characteristics of an elevating mechanism in a bed or the like shown in FIG. 1 and operation characteristics of a conventional elevating mechanism.
FIG. 7 is a mechanism explanatory view showing an example of a conventional elevating mechanism in a bed or the like.
FIG. 8 is an explanatory diagram showing the operation of the lifting mechanism shown in FIG. 7;
[Explanation of symbols]
10 Bed 11 Lifting mechanism 12 Main frame 13, 16 Guide frame 14 Undulating leg member 14a Base end side horizontal axis 14b Upper end side horizontal axis 15 Control arm 17 Auxiliary link 17a Horizontal axis 17b Rotating horizontal axis 18 Linear drive mechanism 18a Motor casing 18b Starting shaft 19 Legs 20, 21 Guide roller 22 Mounting part 23 Mounting tool

Claims (3)

The base of the furniture is provided with guide members respectively toward both ends, and these guide members have up-and-down leg members movably mounted on the upper ends thereof, and an intermediate portion of the up-and-down leg member and the base. A restricting arm shorter than the up-and-down leg member is rotatably connected between the both end portions, and a guide member provided along the up-and-down leg member at a position near the lower end of the up-and-down leg member. Has an auxiliary link rotatably connected at the other end to the regulating arm, and has an interval adjusting mechanism between the upper end of the undulating leg member and one end of the auxiliary link. The distance between the upper end of the undulating leg member and the one end of the auxiliary link is adjusted by a distance adjusting mechanism to expand and contract the distance between the upper end of the undulating leg member and one end of the auxiliary link. And the guide members in the base and the undulating leg members, respectively. Move I, base height adjustment mechanism in the fixture, characterized in that a structure for adjusting the angle by displacing the base of the height between the control arm and the contoured leg member. The furniture is a bed, and the bed includes a head member and a guide member provided along the longitudinal direction of the frame on the head side and the foot side of the frame. A guide member provided between the middle part of the frame and both end sides of the frame, with a regulating arm shorter than the undulating leg member, and provided along the undulating leg member at a position near the lower end of the undulating leg member. An auxiliary link having one end movably mounted on the other end thereof and the other end rotatably connected to the regulating arm, and a gap between an upper end of the undulating leg member and one end of the auxiliary link. 2. A base height adjusting mechanism for a fixture according to claim 1, wherein said base height adjusting mechanism is provided with an adjusting mechanism. The interval adjustment mechanism is a linear drive mechanism having a motor and a starting shaft driven forward and backward by the motor, and the motor side and the starting shaft side are connected to the upper end side of the undulating leg member and the auxiliary link. The base height in a fixture according to claim 1 or 2, wherein the base is attached to one end and both the upper end of the undulating leg member and the one end of the auxiliary link are moved along respective guide members. Adjustment mechanism.

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