JP2001169862A - Control method of actuator for bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give no unpleasant feeling to a user of an electrically driven bed when the bed is lifted and lowered. SOLUTION: Two actuators 2, 3 are disposed under the floor on the head side of a bed 1 and on the foot side thereof, respectively. For lifting the bed 1, the actuator 2 on the head side is driven to lift the head side of the bed 1, and after a certain length of time, the actuator 3 on the side of foot is driven to lift the foot side of the bed. For lowering the bed, the actuator 3 is driven to lower the foot side of the bed, and after a certain length of time, the actuator 2 is driven to lower the head side of the bed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed actuator for raising and lowering a bed using a biaxial actuator.

[0002]

2. Description of the Related Art In a conventional electric bed in which actuators are arranged under the floors on the head side and the foot side of a bed, when the beds are raised and lowered, the respective actuators are simultaneously driven to move up and down linearly. By doing so, the entire bed was raised and lowered.

[0003]

As described above, in the conventional bed lifting method, the bed is raised and lowered by simultaneously driving the two-axis actuators.

[0004] For this reason, if constant speed control such as speed feedback is not performed on the two-axis actuator, variations in the number of revolutions cause, for example, when the bed rises,
The bed on the foot side may rise first, and when the bed descends, the bed on the head side may descend first. As described above, when the head is lower than the foot, the bed user is uncomfortable.

However, if the actuator is driven by speed feedback control or the like, the cost increases.

[0006]

Therefore, according to the present invention, a biaxial actuator is provided under the bed on the head side,
And when arranged under the floor of the bed on the foot side, when raising the bed, by driving the actuator arranged under the floor on the head side, and linearly move upward, the head side Raise the bed, and after an arbitrary time, drive the actuator arranged below the floor on the foot side to linearly move upward, raise the bed on the foot side, and lower the bed By lowering the bed on the foot side by driving the actuator disposed under the floor on the head side and performing a linear motion downward, the actuator disposed on the floor under the head side is driven after an arbitrary time. A bed actuator control method characterized by linearly moving downward and lowering a head-side bed.

[0007]

When the bed is moved up and down by driving the head-side actuator and the foot-side actuator, the timing of driving each actuator is delayed by an arbitrary time, so that the head-side bed is always moved to the foot. Control so that it is higher than the bed on the side of the department.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bed actuator according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic view of a bed illustrating the operation of the present invention when the bed is raised. FIG. 2 is a flowchart for explaining the rising and lowering of the bed according to the present invention.

In FIG. 1 and FIG. 2, actuators 2 and 3 are arranged under the floor on the head side and under the floor on the foot side of the bed 1, respectively. These actuators 2,
The bed 1 can be moved up and down by driving and moving the bed 3 up and down linearly.

When the bed 1 is raised,
First, the actuator 2 installed under the floor on the head side
Is driven to linearly move upward, thereby raising the bed 1 on the head side. Then, after an elapse of an arbitrary time, the actuator 3 disposed below the floor on the foot side is then linearly moved upward, and the entire bed 1 is raised.

Conversely, when the bed 1 is lowered, first, the actuator 3 disposed under the floor on the foot side is driven to linearly move downward, thereby lowering the bed 1 on the foot side. Let it. Then, after an elapse of an arbitrary time, the actuator 2 disposed below the floor on the head side is linearly moved downward, and the entire bed 1 is lowered.

As described above, by always controlling the actuator so that the head is up, the discomfort when the bed is raised or lowered is not given to the bed user.

[0013]

According to the present invention, no discomfort is given to the user of the bed when the bed is raised or lowered.

[0014]

[Brief description of the drawings]

FIG. 1 is a schematic view of a bed illustrating an operation when the bed is raised according to the present invention.

FIG. 2 is a flowchart for explaining a rising and lowering of a bed according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bed 2 ... Head side actuator 3 ... Foot side actuator

Claims (1)

[Claims] 1. A method of controlling a bed actuator for raising and lowering a bed by driving a two-axis actuator to move up and down linearly, comprising: When the bed is lifted, the actuator placed under the floor on the head side is driven to linearly move upward, thereby raising the bed on the head side. Raise the bed, and after an arbitrary time, drive the actuator disposed under the floor on the foot side to linearly move upward, raise the bed on the foot side, and lower the bed on the foot side. By driving the actuator disposed under the floor of the head and linearly moving downward, the bed on the foot side is lowered, and after an arbitrary time, the actuator disposed under the floor on the head side is driven to drive downward. Linear movement is, the control method of the bed actuator, characterized in that to lower the head-side bed.