JP2003325595A - Medical examination instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical examination instrument which does not give a fear to patients such as elderly, children, or cared people by mitigating an impact with a movement when an examination seat and/or a back board seat are elevated/lowered and/or started/stopped in an erecting operation in addition to a steady-state movement, and also by which an examination is performed by attaching importance on efficiency. <P>SOLUTION: When mobile parts to be controlled such as the examination seat 11 for supporting the patient, or the back board seat 12 are controlled in the movement to a predetermined target position in response to the purposes of a treatment and the examination, The acceleration degree and/or deceleration degree are gradually increased when the seats are started and/or stopped, and, then, gradually decreased afterward. Thus, the mobile speed is controlled to be a prescribed maximum speed and/or zero. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a medical examination apparatus,
In particular, the present invention relates to a medical examination apparatus in which a seat can be lifted up and down and a backboard sheet can be raised and lowered, which is preferably used for medical and dental purposes.

[0002]

2. Description of the Related Art Seat chairs for a dental or otolaryngological examination table or a hairdressing / beauty salon have a backboard sheet that can be lifted up and down so that it can be lifted and lowered according to the contents of treatment and treatment. Then, the seat is raised or lowered as appropriate, or the backboard seat is appropriately moved to a standing position or a horizontal position. In the case of a dental examination table, when the patient sits down, the seat sheet is lowered and the back plate seat is in an upright position. The seat is raised (sometimes lowered), and in the case of recumbency treatment, the backboard seat is laid down in a substantially horizontal state. Also,
The back sheet is adjusted to an appropriate angle during treatment, for example, when gargling, or by upper jaw treatment or lower jaw treatment.

Motors, hydraulic mechanisms, and other mechanisms are used as drive sources for such a seat seat elevating mechanism and a backboard seat undulating mechanism. In the case of a dental examination table, operation control of these drive sources is performed. The operation is started by the operator's switch-on operation and stopped by the off-operation when the desired position is reached. In recent years, depending on the content of treatment, there are some which are automatically moved up and down and raised and lowered according to a predetermined operation pattern.

In the case of the above-mentioned dental examination table, the separation distance to the movement target position of the seat or back plate when moving to the next step during treatment (elevation height of the seat, undulation of the back plate). Angle) varies depending on the relationship between the treatment content at that time and the next treatment content. For example, the undulation when the back sheet is erected to gargle the patient during horizontal treatment, and when the back sheet is erected when the treatment is completed or when the patient is removed from the examination table for radiography. The angle is different.

[0005]

As described above, in the dental treatment or the like in which the seat and backboard seats are frequently raised and lowered or raised and lowered, when the patient is an elderly person, a person requiring nursing care, a child, etc., the above seat sheet is used. There is also a concern that the sudden movement of the backboard sheet may give a fear to the patient or cause an unexpected accident. Moreover, since the movement distance (distance to the movement target position) varies depending on the treatment content, if the movement speed is kept constant, the time required for a long movement distance becomes longer and the treatment efficiency is impaired. Also becomes.

From the above viewpoint, Japanese Patent Laid-Open No. 9-519
According to Japanese Patent No. 23, 23, when the dental treatment chair is raised and lowered, the moving speed at the time of starting and stopping is slowed and the speed at the intermediate steady movement is increased to reduce the shock to the patient. It has been proposed that a plurality of different speed patterns be set so that this speed pattern can be appropriately selected depending on the patient's condition.

[0007] However, in this conventional method, there is still a rapid change at the time of starting, when shifting from the starting state to the steady moving state, when shifting from the steady moving state to the stopped state, and further when stopping. For the elderly and children, the impact of this sudden change was still not negligible. In addition, it is not possible to deal with speed according to the separation distance to the target position, which is insufficient for achieving both efficiency and consideration for the patient.

The present invention has been made in view of the above, and makes it possible to change the ascending / descending speed of the seat and the undulating speed (speed mode) of the backboard seat and to make the change of the moving speed gentle so that the impact to the patient is given. Medical treatment that can be controlled as much as possible according to the patient's condition (elderly, child, care recipient, or healthy person) considering the treatment efficiency and the operator can change the speed mode. The medical treatment device is provided.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is such that a seat seat supported on a base so as to be able to move up and down and one end of the seat seat are undulatingly connected. In a medical treatment device for medical treatment having a function of controlling the movement of the controlled movable part made of a backboard sheet, when the controlled movable part is moved up and down or up and down,
The medical examination apparatus is provided with a control means for gradually increasing the acceleration at the time of starting and then gradually decreasing the acceleration to control the moving speed to reach a predetermined maximum speed.

According to this structure, the moving speed of the controlled movable parts such as the seat and the back plate changes gradually from the start up to the predetermined maximum speed, so that almost no shock is given to the patient. There will be nothing. That is, the speed at the start is gradually increased, and the speed is gradually increased before the predetermined maximum speed is reached. As a result, the speed change curve becomes S-shaped, so that the patient on the medical table is accustomed to the movement. Easy,
It will not be impacted by inertia.

According to a second aspect of the present invention, in the first aspect, the control means further reduces the deceleration gradually when the controllable movable portion is stopped from the moving state at the maximum velocity to the target position. It is characterized in that the moving speed is controlled to be zero when the controlled movable section reaches the target position by gradually decreasing the deceleration after that.

According to this structure, the moving speed of the controlled movable part changes gently even when the vehicle is stopped to stop at the target position. Therefore, the speed change curve is opposite to the above S.
It becomes a letter shape, the impact on the patient in this case hardly occurs, and the patient can receive the treatment at ease.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the above, the controlled operating part is automatically controlled to move to a target position preset according to the purpose of movement.

According to this configuration, in a dental treatment, for example, when a switch operation is performed to make the patient gargle from the recumbent treatment state, the standing motion of the back plate sheet is started to reach a predetermined position (gargling position). When it arrives, it will stop automatically. During this time, the above control is performed in parallel.

According to a fourth aspect of the present invention, in any one of the first, second or third aspects, the mechanism for moving up and down or undulating comprises a hydraulic mechanism, and the acceleration and / or deceleration control is performed by the hydraulic mechanism. Is performed by opening / closing control of a hydraulic valve disposed in the middle of a hydraulic oil supply pipeline for operating the valve, the hydraulic valve being fitted to the valve body and being orthogonal to the axial direction of the body part. And a valve rod having a valve hole formed therethrough, so that the valve rod is axially rotated between a position where the hydraulic oil inlet port and the outlet port of the valve body are communicated with each other by the valve hole and a position where the valve hole is sealed. In the peripheral body of the valve rod, a counterbore portion is formed from the sealing position to the valve hole, which communicates with the valve hole and gradually increases the opening cross-sectional area. To do.

According to a fifth aspect of the present invention, in the fourth aspect, when the hydraulic oil inlet port and the outlet port are changed from the sealed state to the open state, the valve rod is axially rotated to move from the spot facing portion. The valve hole is made to communicate with the inlet port and the outlet port by starting the communication with the hydraulic oil supply / discharge port and then continuously rotating the valve shaft axially, and from this open state to the sealed state. According to these configurations, the valve rod is axially rotated in the opposite direction to the above. According to these configurations, the valve rod is axially rotated and the hydraulic oil inlet port and the outlet port are communicated with the valve hole. Thus, the hydraulic oil is supplied from the inlet port to the outlet port through the valve hole. The hydraulic pressure supplied to the operating oil operates the lifting mechanism of the seat or the undulating mechanism of the backboard seat. At this time, when shifting to the valve open state due to the rotation of the valve rod, the counterbore is communicated with the inlet / outlet port, so that the hydraulic oil is gradually supplied from the counterbore. . As long as the spot facing portion is in communication with each port, the rate of increase in the amount of hydraulic oil supplied is slow. Is slowly done with the increase of.

When the valve hole begins to directly communicate with each port by continuously rotating the valve shaft thereafter, the valve opening speed between the valve hole and each port is increased, and the supply of hydraulic oil is accordingly increased. The speed (supply amount) increases. Therefore, the raising or lowering speed of the seat or backboard seat becomes faster,
Eventually the acceleration reaches its peak.

After this peak, when the spot facing portion reaches the opposite edge of each port and begins to enter the valve sealing region, the rate of increase in valve opening speed (that is, valve opening acceleration) begins to decrease. The increase rate of the hydraulic oil supply rate also decreases. Therefore, the seat or backboard seat continues to go up and down or undulate, but as the rate of increase or decrease or undulation becomes slower (acceleration decreases), it goes up and down when the valve hole and each port are fully open. Alternatively, the undulation speed becomes the maximum speed.

As described above, due to the structure of the valve, the acceleration of ascending / descending or undulating gradually increases at the time of starting the seat or the backboard seat, and this acceleration gradually increases before reaching the predetermined maximum speed. It will be controlled to decrease so that the patient on the couch can sit or lie down without any impact.

When the seat seat or the back plate seat is lifted or raised or lowered and the stop operation is started, the valve seat can be rotated (reverse rotation to the above) so as to close the valve stem. Can be gradually increased, and then the deceleration can be gradually decreased to control the moving speed to zero when the controlled movable portion reaches the target position.

With such a valve structure, it is possible to gradually change the acceleration and deceleration at the time of starting and stopping, so that it is not limited to the case where the movement is controlled to a preset target position, and it is optional. Even when raising or lowering or raising or lowering to the position, it is possible to suppress a sudden movement of the seat or backboard sheet by simply turning the switch on and off.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the above, the valve hole and the corresponding hydraulic oil inlet port and outlet port are respectively provided along the axial direction of the valve rod by 2
Individually formed, each constitutes a forward path and a return path for the hydraulic oil, and the axial rotation of the valve stem causes the return path to be closed when the forward path is open,
It is characterized in that when the return path is in the open state, the forward path is in the closed state, and both are simultaneously closed.

When the seat seat or the back plate seat is lifted or lowered, a forward path of hydraulic oil for raising or standing and a return path of hydraulic oil for lowering or falling down.
Each requires an independent control valve. In this configuration,
Since the outward path and the return path are individually configured with one valve rod and this is achieved by the axial rotation of the valve rod, the mechanism of the hydraulic pipeline becomes extremely compact.

By the axial rotation of the valve rod, the above three modes (the return path is closed when the forward path is open, the return path is closed when the return path is open, and both are closed at the same time) In order to ensure execution, specifically, as described in claim 7, the valve hole bends at an obtuse angle at the axial center position of the valve rod, and the inlet port and the outlet port of the hydraulic oil are It is desirable to form it at a position that matches the refraction angle of the hole.

According to an eighth aspect of the present invention, in any one of the fourth to seventh aspects, the shaft rotation of the valve rod is performed by a servo motor or a stepping motor, and the shaft rotation speed of the valve rod is the servo motor or the stepping motor. It is characterized by being variable by a stepping motor. In the above, it was stated that the structure of the valve controls the acceleration or deceleration at the time of starting or stopping, but according to this configuration, by additionally using the rotation speed control of the servo motor or the stepping motor, the patient can be controlled. This makes it possible to more precisely control the moving speed that is comfortable for the user.

Further, in the above, the case where the valve is fully opened to obtain a predetermined maximum speed has been described, but there is a case where the valve may be opened to a predetermined maximum speed with an appropriate opening degree. In such cases, before reaching the maximum speed at the start,
Alternatively, when the stop operation is started from the maximum speed state, the counterbore portion is not related to the opening degree of the valve, and therefore the acceleration or deceleration control as described above cannot be performed only by the structure of the valve. Therefore, according to this configuration, in such a case, the acceleration or deceleration control can be performed by controlling the rotation speed of the servo motor or the stepping motor.

According to a ninth aspect of the present invention, in the third aspect, the medical examination device is a dental medical examination device, and the movement target position of the controlled movable portion is a position specified according to the purpose of movement interruption. It is characterized in that it is set to any one of the patient entrance / exit position, the treatment position, and the gargle position, depending on the control mode.

According to this structure, by controlling the moving speed as described above according to the target position peculiar to the dental treatment, in addition to eliminating the moving impact on the patient and alleviating the fear, the treatment can be performed. The efficiency can be improved and ideal dental treatment can be performed.

According to a tenth aspect of the present invention, there is provided a controlled movable portion including a seat seat supported on a base so as to be capable of moving up and down, and a back plate seat movably connected to one end of the seat seat. In a medical examination apparatus having a function of controlling movement to a target position set in advance according to the purpose of movement, when the controlled movable section is moved up and down or up and down to move to the target position, movement of the controlled movable section is performed. The medical examination apparatus is characterized in that the speed is variably controlled according to the separation distance to those target positions.

In the case of the medical examination apparatus to which the present invention is applied, when a seat or a backboard is raised or lowered in order to enter the next treatment state in a series of treatment processes,
For example, when the patient is guided to the waiting table and the table is placed horizontally to enter the treatment state, or when the backboard sheet is erected at a predetermined angle to gargle during horizontal treatment. , Etc., the ascending / descending height and the undulation angle (separation distance) to the target position of the medical examination table to be operated differ depending on the treatment mode at that time.

Thus, according to the present invention, when entering the next treatment state, the moving speed of the controlled movable portion is variably controlled according to the distance to the target position. By appropriately setting the speed pattern according to the distance, it is possible to construct a system capable of achieving both an appropriate speed mode according to the patient and efficiency of treatment time.

According to an eleventh aspect of the invention, in the tenth aspect, there is provided threshold value setting means for setting a threshold value for varying the moving speed, and the present position of the controlled movable portion. Of the control means and the position information of the controlled movable part detected by the sensor means, the separation distance to the target position is measured, and when the separation distance exceeds the predetermined threshold value, the movement is performed. And a moving speed control means for executing the moving speed in the low speed mode when the speed is executed in the high speed mode and is smaller than a set predetermined threshold value. According to this, when the separation distance is large, the moving speed is increased by executing the high speed mode, so that the time required for this movement is shortened and the treatment efficiency is improved.

According to a twelfth aspect of the present invention, in the medical examination apparatus, the patient type selection switch and the movement of the controlled movable part to the target position are selected by the patient type selection switch. A patient type selection switch characterized by having a moving speed control means for executing in a predetermined speed mode, and movement of the controlled movable part to a target position is selected by the patient type selection switch. And a moving speed control means for executing the operation in a predetermined speed mode according to the type of patient.

According to this structure, the movement of the controlled movable part such as the seat and the back plate can be executed in the predetermined speed mode according to the type of the patient. If the speed mode is set so that the child or care recipient does not feel fear, the patient can be treated with peace of mind.

According to a thirteenth aspect of the present invention, in the medical examination apparatus, there is provided threshold value setting means for setting a threshold value for varying the moving speed of the controlled movable part to the target position, and A sensor means for detecting the current position of the controlled movable part, a specific speed mode selection switch, and when the specific speed mode selection switch is not operated,
According to the position information of the controlled movable part detected by the sensor means, the separation distance to the target position is measured, and when the separation distance exceeds the predetermined threshold value, the moving speed is set to the high speed mode. When it is executed and is smaller than the set predetermined threshold value, the moving speed is executed in the low speed mode, while when the specific speed mode selection switch is operated, the moving speed is set regardless of the threshold value. And a moving speed control means for executing a moving speed to a target position with respect to the controlled movable part in a preset safe speed mode.

In the present invention, the execution function in the safe speed mode is further added. When the patient is a healthy person, priority is given to the efficiency of the treatment, and in the case of an old person, the fear is eliminated and the sense of security is eliminated. Is given priority.

According to a fourteenth aspect of the present invention, in the medical examination apparatus, an operation switch for operating the controlled movable part, a detecting means for detecting an operation state of the operated switch, and the controlled movable part. And a moving speed control means for executing the movement to the target position in a speed mode predetermined according to the detection result of the detecting means.

According to the fifteenth and sixteenth aspects of the present invention, in the fourteenth aspect, the operation state is time or pressure, and the detecting means detects the operation time of the operation switch or the operation switch. The feature is that the pressing force is detected. Therefore, the operator can execute the movement of the controlled movable part in the most appropriate speed mode by looking at the patient on the examination table or in consideration of the next examination mode.

The invention according to claim 17 is applied to a dental treatment apparatus as a medical examination apparatus, and the target position for the controlled movable part is a treatment of a dental examination table.
Depending on the position control mode identified according to the diagnostic purpose,
It is characterized in that it is set to any one of a patient entrance / exit position, a treatment position, and a gargling position. By controlling the moving speed according to the target position peculiar to the dental treatment, it is possible to execute an ideal dental treatment such as improving the efficiency of the treatment and alleviating the fear of the patient.

The invention described in claim 18 is the medical treatment apparatus for medical use, wherein the movement control is carried out according to any one of claims 1 to 9.
18. The movement control according to claim 10, and
A medical examination apparatus characterized by being combined with the movement control described in any one of 1.

That is, according to the first to ninth aspects of the invention, the acceleration or deceleration at the time of starting or stopping at the time of raising or lowering or raising or lowering the controlled movable part such as the seat or the backboard sheet is controlled. The purpose is to reduce the impact on the patient when moving. On the other hand, claims 10 to 17
The invention described in (1) aims to achieve both establishment of an appropriate speed pattern according to the patient and efficiency of treatment by taking into consideration the condition of the patient and the separation distance to the movement target position. INDUSTRIAL APPLICABILITY The present invention is a medical examination apparatus having both technical ideas, and is particularly ideal as a dental examination apparatus.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a side view for explaining the medical examination apparatus of the present invention by taking a dental examination apparatus as an example. In the figure, reference numeral 1 is a dental examination table, which is a base 1 installed on the floor.
A seat 11 that can move up and down is provided on the zero. A back plate sheet 12 is continuously provided at one end of the seat 11 so as to be capable of undulating.

These elevating mechanism 100 and undulating mechanism 200
As the drive source, a mechanism in which a motor (servo motor or the like) or a hydraulic mechanism is used as a drive source and a link mechanism is combined with the drive source is adopted. As shown in FIG.
It is built into 2. A footrest (a part of the seat 11) is connected to the backboard seat 12 via a link mechanism (not shown) incorporated in the seat 11.
The footrest may be configured to bend with respect to the seat 11 as the backboard seat 12 moves up and down.
The lifting mechanism 100 and the undulation mechanism 200 will be described later.

At the other end of the back plate sheet 12, a vertically movable headrest 13 for supporting the patient's head is further connected. A tray 2 for placing various jigs and chemicals used by a surgeon to perform a treatment operation, or for preparing various fillers is horizontally swivelable on the side of the backboard sheet 12 on the side of the backboard sheet 12. It is mounted so that it can maintain a horizontal state regardless of the undulating motion. Further, a handpiece holder 21 for holding the handpiece is fixed to one edge of the tray 2.

Further, a gargle basin 3 and a dental light 4 are installed on one side of the seat 11 (opposite to the side where the patient gets on and off). Dental light 4
Is for irradiating the inside of the patient's oral cavity on the medical examination table 1, and is a dental light arm 41 composed of a plurality of link members joined to the upper end of a column 40 standing on the floor so as to be horizontally pivotable and bendable. It is attached to the tip of the so that it can swing freely.

Reference numeral 5 is a foot pedal switch for allowing the operator to raise and lower the seat 11 and raise and lower the back plate 12. Further, although not shown, a work tray for nurses and other related devices are appropriately arranged on the side of the medical examination table 1.

A medical examination table 1 shown by a solid line in FIG.
Indicates a state during normal dental treatment, and the back plate sheet 12 is laid down substantially horizontally. The height level of the medical examination table 1 and the lying state of the backboard sheet 12 at this time are indicated by A.
Ao and B indicate the height level of the medical table 1 and the standing position of the backboard sheet 12 (the backboard sheet 12 shown by a chain double-dashed line corresponds to this) when the patient is moved in and out of the medical desk 1. Show.

Further, C indicates a position in which the back plate sheet 12 is erected in order to gargle the patient during treatment. Further, D indicates the tilted position of the back plate sheet 12 which is appropriately set by the operator in accordance with a treatment mode other than the above, and in this manner, in dental treatment, the operator is dependent on the purpose of treatment and diagnosis. The seat 1 by selecting a predetermined position control mode.
1 and the back plate sheet 12 are set to various height positions and tilt angles.

Next, the elevating mechanism 100 and the undulating mechanism 2 described above.
An example in which a hydraulic mechanism is adopted as 00 will be described. Figure 1
The operating bodies of the lifting mechanism 100 and the undulating mechanism 200 shown in FIG.
0), which are operated by the hydraulic oil supplied by the hydraulic pump 400. Hydraulic valves 101, 201 are arranged in the middle of the hydraulic oil supply line. Servo motors 102, 2 are provided in the hydraulic valves 101, 201.
02 are connected in series, and the opening / closing control of the hydraulic valves 101, 201 is performed by the rotation operation of the servo motors 102, 202.

FIG. 2 is a circuit diagram of the hydraulic mechanism. The hydraulic pump 400 is operated by a hydraulic motor 401 to transfer hydraulic oil from the oil tank 500 to the hydraulic valves 101, 20.
1 to supply the hydraulic cylinders 100 and 200 to the outward path. As will be described later, the hydraulic valves 101 and 201 include forward valve holes 101a and 201a and return valve holes 101b and 101b.
201b and. When the outward passage valve holes 101a and 201a are opened, the hydraulic oil from the hydraulic pump 400 is supplied to the hydraulic cylinders 100 and 200, and the return passage valve hole 101 is formed.
When b and 201b are opened, the hydraulic cylinders 100, 2
The hydraulic oil in 00 is returned to the oil tank 500.

First, the operation of the lifting mechanism (hydraulic cylinder) 100 will be described. In FIG. 2, the hydraulic pump 40
0 is operated, and the outward valve hole 101a of the hydraulic valve 101 is opened by the operation of the servo motor 102, hydraulic oil is supplied to the working chamber 100a of the hydraulic cylinder 100. As a result, the rod 100b of the hydraulic cylinder 100 extends and the seat 11 (clinic table 1) rises. When the seat 11 reaches a predetermined height, the forward valve hole 101a
Closed and then the hydraulic valve 101 and the hydraulic cylinder 100.
The solenoid valve 103 disposed between and is closed. afterwards,
The hydraulic pump 400 is stopped. At this time, the return valve hole 1
01b is also closed.

The solenoid valve 103 is provided so that even if some oil leaks in the hydraulic valve 101, the filling state of the working oil in the working chamber 100a is not affected. It is controlled so that it is opened at the time of supplying or returning.

As described above, when the electromagnetic valve 103 and the hydraulic valve 101 are kept closed, the seat 11 is kept at a predetermined height with the rod 100b extended. When lowering the seat 11 from this state,
After opening the solenoid valve 103, the servo motor 102 is operated to open the return valve hole 101b of the hydraulic valve 101 (the outward valve hole 101a remains closed). At this time, the rod 100b retracts due to the weight of the seat 11 or the weight of the patient added thereto, and as a result, the hydraulic oil in the working chamber 100a is returned to the oil tank 500 through the return valve hole 101b, and the seat The seat 11 descends.

The above-described series of operations is performed by the operator's switch operation. For example, the opening / closing timing of the solenoid valve 103 after the start switch or the stop switch and the servo motor 10
The rotation start or stop timing of No. 2 is predetermined.

Next, the operation of the undulating mechanism (hydraulic cylinder) 200 for the back plate sheet 12 will be described. The hydraulic cylinder 200 shown in FIG. 2 is used for an undulating mechanism of a type in which the footrest is also bent in conjunction with the undulation of the back plate sheet 12 as described above. That is, when the backboard sheet 12 is in the upright state, the footrest is bent to the seat sheet 11, and when the backboard sheet 12 is in the lying state, the footrest is pushed up to be in a straight line state with the seat sheet 11 (horizontal state).
It works together to become.

The hydraulic cylinder 200 includes the first working chamber 20.
0a, a second working chamber 200b and a telescopic rod 200c, and these first and second working chambers 200a, 200
Hydraulic valves 201 and 301 similar to the above are connected to b via electromagnetic valves 203 and 303, respectively. The hydraulic valves 201 and 301 are also controlled to be opened / closed by the servomotors 202 and 302 as described above. The outward valve holes 201a and 301a are respectively provided in the hydraulic pump 400.
And the first and second working chambers 200a and 200b communicate with each other, and the return valve holes 201b and 301b are provided in the first and second working chambers 200a and 200b and the oil tank 50.
Opening / closing control is performed so that 0 and 0 communicate with each other.

In FIG. 2, the hydraulic pump 400 operates,
When the outward valve hole 201a of the hydraulic valve 201 is opened by the operation of the servo motor 202, hydraulic oil is supplied to the first working chamber 200a of the hydraulic cylinder 200. As a result, the rod 200c of the hydraulic cylinder 200 expands, the back plate seat 12 rises, and the footrest bends with respect to the seat 11 (its tip swings downward). When the back plate sheet 12 reaches a predetermined upright angle, the outward valve hole 201a is closed and then the solenoid valve 203 is closed.
Then, the hydraulic pump 400 is stopped. At this time, the return valve hole 201b is also closed.

In the above operation process, the hydraulic valve 20
In parallel with the opening operation of the outward valve hole 201a of No. 1, the opening operation of the return valve hole 301b of the hydraulic valve 301 is performed at the same time, and the hydraulic oil in the second working chamber 200b is returned to the oil tank 500. The forward valve hole 201a of the hydraulic valve 201
At the same time as the closing operation of the
1b is also closed.

As described above, when the electromagnetic valve 203 and the hydraulic valve 201 are maintained in the closed state, the back plate sheet 12 is maintained at a predetermined standing angle with the rod 200c extended. Further, the footrest is also maintained at a predetermined refraction angle. From this state, when the backboard sheet 12 is laid down and the tip of the footrest is caused, the hydraulic pump 400
Is operated to open the solenoid valves 203 and 303, and then the servomotor 202 is operated to open the return valve hole 201b of the hydraulic valve 201. At the same time, the servomotor 302 is operated to move the hydraulic valve 301 to the forward path. The valve hole 301a is opened (the outward valve hole 201a and the return valve hole 301b remain closed).

At this time, the working oil is supplied to the second working chamber seat 200b through the outward valve hole 301a of the hydraulic valve 301, and the working oil is fed from the first working chamber 200a to the return valve of the hydraulic valve 201. It is returned to the oil tank through the hole 201b. As a result, the rod 200c is retracted, and the backboard sheet 12 is laid down and the tip of the footrest is raised.

The reason why the first and second working chambers 200a and 200b are provided in the hydraulic cylinder 200 and the hydraulic valves 201 and 301 are connected to the hydraulic cylinder 200 is that the footrest is caused when the backboard seat 12 is laid down. This is because, at this time, the footrest receives a load due to the weight of the footrest itself and the weight of the patient's foot in the direction opposite to the operating direction, and it is necessary to give the footrest a thrust force that overcomes this load. .

Based on FIGS. 3 to 7, the hydraulic valve 101,
The structure of 201 and 301 and the valve opening / closing control by this structure will be described. For convenience, the hydraulic valve 101 is shown in FIGS.
Will be described as an example. 3 is a schematic perspective view of the hydraulic valve 101, FIG. 4 is a cross-sectional view thereof, and FIGS. 5A and 5B are cross-sectional views showing the operating state thereof. FIG. The open state means that (b) is the return valve hole 1
01b indicates the open state, respectively. In addition, FIG.
FIG. 7 is a diagram for explaining a speed change pattern, an acceleration change pattern, and an opening / closing operation pattern of the hydraulic valve 101 in the ascending operation of the seat 11 in association with each other, and FIG. 7 is a view showing various operation patterns of the seat 11.

In FIG. 3, the cylindrical valve rod 104 includes
Two valve holes 101a, 1 orthogonal to the axial direction in the body
01b is vertically provided. Although not shown in the drawings, the servomotor 102 shown in FIG. 2 is connected to the valve rod 104, and the servomotor 102 rotates the shaft in the forward and reverse directions as shown by the arrow. Of the valve holes 101a and 101b, the upper valve hole 101a is used for the forward path of hydraulic oil, and the lower valve hole 101b is used for the return path. These valve holes 101a, 10
1b is bent at an obtuse angle about the axis of the valve rod 104, and the positional relationship between the two is as shown in FIGS.

The valve rod 104 is inserted into the valve body 105 (see FIGS. 4 and 5) so as to be rotatable about its axis. Although not shown in FIG. 3 in order to prevent leakage of hydraulic oil, its circumference is omitted. The body is provided with a plurality of O-ring mounting circumferential grooves along the axial direction. The valve body 105 has the valve holes 101a and 101b.
Corresponding to the above, a forward pass inlet port 105a, a forward pass outlet port 105b, a return pass inlet port 105c, and a return pass outlet port 105d are formed.

The forward path inlet port 105a is the hydraulic pump 4
00, the forward path outlet port 105b is connected to the working chamber 100a of the hydraulic cylinder 100 via the solenoid valve 103. Further, the return port inlet port 105c is connected to the working chamber 100a of the hydraulic cylinder 100 via the solenoid valve 103.
In addition, the return port 105d is connected to the oil tank 500, respectively.

Small counterbore portions 101c, 101d, 101e, 10 communicating with the valve holes 101a, 101b are provided at the inlet and outlet openings of the valve holes 101a, 101b.
1f is provided. These counterbore parts 101c, 10
1d, 101e, 101f are valve holes 101a, 101b
When rotating the shaft to open the
The peripheral portion of the valve rod 104 is excavated and formed so as to start communicating with the a, 105b, 105c, and 105d and gradually increase the communication cross-sectional area.

The valve opening / closing operation of the hydraulic valve 101 having the above structure will be described. 3 and 5 (a) shows the valve hole 101a.
Is open and the valve hole 101b is closed, and FIG.
FIG. 5B shows a state in which the valve holes 101b are open and the valve hole 101a is closed. When the hydraulic pump 400 in FIG. 2 is operated and the solenoid valve 103 is opened, the valve rod 104 is rotated clockwise in order to open the valve hole 101a from the state where both valve holes in FIG. 4 are closed. The counterbore portions 101c and 101d start to communicate with the outward path inlet port 105a and the outward path outlet port 105b.

Therefore, at the initial stage of rotation of the valve rod 104, the amount of hydraulic oil supplied to the working chamber 100a of the hydraulic cylinder 100 is small, and the seat 11 begins to slowly rise [from the state (1) in FIG. ) Condition], the patient on the seat 11 does not receive an impact at the time of starting.

Thereafter, when the valve rod 104 is further rotated, the communication opening area is increased, and accordingly, the rising speed of the seat 11 is gradually increased. In the state (2) of FIG. 6, that is, until the valve hole 101a is in the half-opened state, the increase rate of the supply amount of the hydraulic oil increases, and the rising acceleration of the seat 11 increases. Then, when the valve rod 104 continues to rotate, the spot facings 101c and 101d pass through the ports 105a and 105b and approach the sealing region, so that the supply amount of the hydraulic oil continues to increase (the rising speed of the seat 11 still remains. (Although it increases), the rate of increase gradually decreases, and thus the rising acceleration of the seat 11 decreases.

Eventually, the state of (3) in FIG. 6 and FIG.
When the valve hole 101a is fully opened as shown in (a), the rising speed of the seat 11 reaches the maximum speed, and the rising acceleration becomes zero. When the servomotor 102 is turned off in this state to stop the rotation of the valve rod 104, the hydraulic oil is still supplied as indicated by the solid arrow in FIG.
Seat Seat 11 continues to rise at maximum speed [Fig. 6 (4)]
State]. Then, since the shift to the maximum speed is made gently, the patient on the seat 11 does not feel any shock.

When the seat 11 approaches the target height position, the servomotor 102 is operated to start the rotation of the valve rod 104 in the opposite direction (counterclockwise direction) to that shown in FIG.
State (5)]. Reverse rotation of the valve rod 104 causes valve hole 101
Since a starts to close and the supply amount of hydraulic oil begins to decrease,
The rising speed of the seat 11 starts to decrease. In the initial stage of this stop, the spot facings 101c and 101d in the sealing area are provided.
Starts to recommunicate with the ports 105a and 105b, the closing speed of the valve hole 101a is slow and therefore the deceleration of the seat 11 is small. That is, when shifting from the maximum speed state to the stopped state [state (6) from state (6) in FIG. 6]
However, since the transition is extremely gradual, the patient on the seat will not be impacted by the change in speed.

Up to the half open state of (6) in FIG. 6, the valve hole 10
The closing speed of 1a gradually increases, so that the seat 1
The deceleration of 1 increases. After that, when the half-opened state of (6) is passed and the spot facings 101c and 101d approach the sealing area again, the closing speed of the valve hole 101a becomes slower again, and the ascending / decelerating speed of the seat 11 decreases. As it is, the state (7) of FIG. 6 (completely closed, that is, the stopped state) and the state of FIG. 4 are slowly shifted to the stopped state. Therefore, the seat seat 11 transitions from the maximum ascending speed state to the stop state very slowly, and the seat seat 1
No impact is given to the patients above 1.

As described above, during the transition of the valve hole 101a from the fully closed state to the fully opened state, and from the fully opened state to the fully closed state,
As understood from the figure, the return valve hole 101b is never opened. This is the valve holes 101a, 10
1b is bent at an obtuse angle, and both valve holes 101a,
The positional relationship of 101b, and further the respective ports 105a, 105
This is due to the formation positions of b, 105c, and 105d.
As described above, the return valve hole 101b used when the seat 11 is lowered can be formed in the same valve rod 104 as the outward valve hole 101a, which greatly contributes to downsizing of the apparatus.

After the state of FIG. 6 (7), that is, after the seat 11 reaches the predetermined height position, the solenoid valve 103 of FIG. 2 is closed and the hydraulic pump 400 is stopped.
In this state, the working chamber 100a of the hydraulic cylinder 100 is kept filled with the working oil (the rod 100b
Are maintained in an extended state), and thus the seat 11 is maintained at a predetermined height position.

FIG. 6 has been described for the case where the predetermined maximum speed (steady transition speed) causes the outward valve hole 101a to be fully opened. However, if the maximum speed itself is high, the elderly person may feel a sense of fear. . In such a case, it is also necessary to control the movement while suppressing the speed without fully opening the valve hole 101a. FIG. 7 shows examples of various speed patterns from such a viewpoint. When the predetermined maximum speed is set without fully opening the valve hole 101a, when the maximum speed at the time of starting is changed or when the maximum speed state is changed to the stop operation, the spot facings 101c and 101d are In this case, the speed patterns shown in FIG. 7 are obtained by adjusting the rotation speed of the servo motor 102 because the opening degree is not concerned.

FIG. 6 shows an example in which the speed is maintained constant for a while after the predetermined maximum speed is reached [state (4)], but the stop control is started immediately after the maximum speed is reached. In this case, in the speed pattern shown in the same figure, the S-shaped curve at the time of starting shifts immediately to the reverse S-shaped curve at the time of stopping with the maximum speed as the apex. In the acceleration pattern, the straight line part [(4)
Of the acceleration control zone [(1) (2)]
From (state of (3)), the zero acceleration is used as an inflection point to continuously shift to the downward curve of the deceleration control zone [states of (5), (6) and (7)].

When lowering the seat 11 that is maintained at the predetermined height as described above, the solenoid valve 103 is opened, the servo motor 102 is operated, and the valve rod 104 is moved counterclockwise as shown in FIG. Rotate in the direction. In this initial stage, similarly to the above, from the spot facings 101e and 101f to the inlet port 105.
c and the outlet port 105d start communicating. Since the hydraulic cylinder 100 is loaded by the weight of the medical examination table 1 and the weight of the patient, the hydraulic oil in the working chamber 100a is pushed out, and the inlet port 105c, as shown by the broken line arrow in FIG. Return valve hole 101b and outlet port 105d
Through the oil tank 500.

The amount of hydraulic oil flowing into the oil tank 500 is determined by the rotation of the valve rod 104, that is, the return valve hole 101b from the fully closed state of FIG. 4 to the fully opened state of FIG. 5 (b), and FIG. 5 (b). 6 changes from the state of FIG. 4 to the state of FIG. 4, but since the geometrical function of the return valve hole 101b is the same as that of the outward valve hole 101a, it is also shown in FIG. It is possible to execute in the same speed pattern as. Therefore, even when the seat 11 is lowered, the seat 1
The patient above 1 does not feel any shock. Needless to say, it is also possible to control the lowering of the seat 11 with a speed pattern as shown in FIG. 7 by using the rotation speed control of the servo motor 102 together.

It should be noted that the outward valve hole 101a is never in the open state while the return valve hole 101b is transiting from the fully closed state to the fully open state or from the fully open state to the fully closed state.

In the above, the lifting mechanism 10 for the seat 11 is used.
The opening / closing control of the hydraulic valve 101 at 0 has been described in detail, but the same valve structure is adopted for the hydraulic valves 201 and 301 of the undulating mechanism (including the bending mechanism of the footrest) 200 of the backboard seat 12, so that the seat Sheet 1
It is easy to understand that it is possible to realize the undulation speed pattern of the backboard sheet 12 similar to the ascending / descending speed pattern of No. 1 and to exert the shock absorbing function for the patient even in the undulating motion of the backboard sheet 12. Let's do it. Therefore, a detailed description thereof will be omitted here.

FIG. 7 shows some examples of velocity curves when the above control is carried out. In either case, it is understood that an S-shaped curve is drawn at the start and an opposite S-shaped curve is drawn at the stop. In the figure, the curve x represents the case where the moving distance is short and the predetermined maximum speed is low. Curve y represents the case where the moving distance is long and the predetermined maximum speed is increased. Further, the curve z is a curve in which the predetermined maximum speed is not constant but is changed. The speed pattern in the illustrated example is only an example, and various suitable patterns can be set according to the moving distance, the condition of the patient, and the mode of treatment. For example, when the moving distance is shorter, it is possible to start the stop control as soon as the predetermined maximum speed is reached. In any case, it is still most effective to control the speed change so as to draw an S-shaped curve or an inverse S-shaped curve as described above at the time of starting and stopping when a shock is easily applied to the patient. .

Next, a second embodiment of the present invention will be described with reference to the block diagram of FIG. 8 and the flow charts of FIGS. 9 and 10.
The operation control of the seat 11 and the back plate 12 will be described. In FIG. 8, reference numerals 11 and 12 denote a seat seat and a backboard seat, respectively, which will be described here as drive mechanisms thereof. The drive mechanism 11 for the seat and the drive mechanism 12 for the backboard seat are connected to the moving speed control means 6 including a signal processing means such as a CPU, and are selected by the moving speed control means 6. Drive control is performed according to the position control mode.

The position detection sensors 11a and 12a detect the current positions of the seat 11 and the backboard sheet 12, and the detection data are sequentially input to the moving speed control means 6. The threshold value setting means 7 is a means for an operator, a service person, or the like to set a threshold value described below to an appropriate value. The specific speed selection switch (patient type selection switch) 8, which will be described in detail later, also depends on the condition of the patient (elderly, child, care recipient, or healthy person), the seat 11 and the back. A switch for selecting an appropriate moving speed of the plate sheet 12, which is operated by an operator or a nurse, and is installed at an appropriate position around the medical examination table 1.

The operation switch 9 is a switch for directly raising and lowering or raising and lowering the seat seat 11 or the backboard seat 12, and the operation switch 9 has a detecting means 9
A timer for measuring the operation time as 1 or a pressure sensor for detecting the pressing force at the time of operation is additionally provided, and the detection data by the detection means 91 is input to the moving speed control means 6. The moving speed control means 6 compares the detection data with one or more predetermined values set in advance, and instructs the seat seat 11 or the backboard seat 12 to move up and down or to rise and fall in a predetermined speed mode. Is sent. This operation switch 9 is also operated by an operator or a nurse and is installed at an appropriate position around the medical examination table 1.

In the dental treatment of a patient on the dental examination table 1 as described above, the seat seat 11 and the back plate seat 12 as the controlled movable parts are positioned in accordance with a program prepared in advance according to the purpose of treatment and diagnosis. Controlled. The movement of the seat 11 and the back plate 12 is controlled to different target positions (patient entrance / exit position, treatment position, gargle position, etc.) for each position control mode. That is, when the operator operates a switch (not shown, for example, a gargle switch) corresponding to the next treatment, the seat 11 and / or the back plate 12 moves to a position (target position) suitable for gargle.

At this time, the moving speed control means 6 calculates the position information from the position detection sensors 11a and 12a and the separation distance from the target position to the target position, and the threshold value setting means 7 sets it in advance. Compare with threshold value. The moving speed control means 6 has a moving speed mode (high speed mode, low speed mode) for the seat 11 and the back plate 12 depending on whether the threshold value is larger or smaller than the threshold value.
The sequence program for executing is registered, and the selected speed mode is executed based on the comparison result.

The above operation flow will be further described with reference to FIG. When a start command is issued (step S1),
The position control mode is read in step S2.
That is, in FIG. 1, the patient sits on the medical examination table 1, and Ao,
Seat B 11 from position B to position A, where treatment is ready
And when the back plate sheet 12 moves, or when the back plate sheet 12 moves from the position A to the gargle position C, by an operator (or nurse) operating instruction input,
The movement target position is fixed here.

The moving speed control means 6 includes the position detecting sensor 1
The distance between the position information by 1a and 12a and the target position is calculated (step S3), and then this distance is compared with the threshold value in step S4. When it is determined that the separation distance is equal to or greater than the threshold value, the high speed mode is executed (step S5), and the seat 11 and / or the backboard seat 12 is moved to the target position at a high speed.

When it is determined that the threshold value is smaller than the threshold value, the low speed mode is executed (step S
6). Therefore, for example, in FIG. 1, the movement from the position B to the position A or the movement in the opposite direction has a large separation distance, so the high speed mode is executed, and the movement from the position D to the position C or the opposite direction is performed. Since the distance of movement is small, the low speed mode is executed.

FIG. 10 shows an operation flow when the specific speed selection switch 8 is provided side by side. After step S1, it is determined whether the specific speed selection switch 8 is turned on (step S11). That is, the surgeon or nurse looks at the state of the patient who is going to sit on the examination table 1 (whether it is an old man, a child, a care recipient, or a healthy person), and depending on the movement of the seat 11 and the back plate 12, When it is determined that the patient may feel fear, the specific speed selection switch 8 is turned on.

When it is determined in step S11 that the switch 8 is turned on, the safe speed mode is executed regardless of the threshold value (step S1).
2). This safe speed mode is a program in which an operation pattern of slow start → slow speed movement → slow stop is pre-programmed, and is devised so as not to give fear to a patient due to less impact due to inertia during movement. Such a safe speed mode is not limited to one type, and a plurality of operation patterns may be prepared corresponding to the patient's condition. When programming a plurality of operation patterns, a plurality of operation switches are provided correspondingly. On the other hand, when it is determined in step S11 that the specific speed selection switch 8 is not turned on, the same flow as that shown in FIG. 9 is executed. Therefore, the explanation is omitted here.

FIG. 11 shows operation patterns of the backboard seat 12 (seat seat 11) in the various speed modes described above. The vertical axis represents the opening angle of the servo valve provided in the hydraulic circuit of the hydraulic mechanism when the hydraulic mechanism is used as the operating mechanism. This opening angle corresponds to the operating speed. Further, the horizontal axis indicates the elapsed time.

In the figure, "a" shows the case where the high speed mode is executed because the separation distance to the target position is larger than the threshold value, and "b" shows that the low speed mode is executed because the separation distance is smaller than the threshold value. It shows the case. ba indicates the case where the same separation distance as in the case of a is executed in the low speed mode. a1 is a
It is understood that the time required to reach the target position in the case of executing step a is shorter than the time a2 required in the case of executing ba. Therefore, when the separation distance to the target position is large, the high speed mode is selected, and the treatment efficiency is improved. In the figure, the acceleration at the start and the deceleration at the stop in the high speed mode a are larger than those in the low speed mode b, but they may be the same.

FIG. 11c shows the case where the safe speed mode is executed. In this case, the acceleration at the start, the speed at the constant speed movement, and the deceleration at the stop are set to be smaller than those in the cases a and b.
Therefore, the inertial impact on the patient on the medical examination table 1 is small,
The patient's fear is alleviated. As described above, in the embodiment shown in FIG. 4, when the specific speed selection switch 8 is operated according to the condition of the patient, the safe speed mode is executed with priority over the treatment efficiency.

In the above embodiment, when the variable control of the high speed mode and the low speed mode is performed according to the distance to the target position, and when the specific speed selection switch 8 is provided and the switch 8 is operated. Although the case where the safe speed mode is preferentially executed has been described, it goes without saying that the present invention also includes the case where the safe speed mode has only the function.

FIG. 12 shows another aspect of the second embodiment, that is, the case where the operation switch 9 is operated. When the start command is issued in step S1, the position control mode is read in step S2 as in the case of FIG. 9, and the movement target position of the seat 11 or the back plate 12 is fixed. In step S13, it is determined whether the operation switch 9 has been operated. When operated, the operation time or operation pressure (pressing force) at the time of operation detected by the detection means 91 is compared with the predetermined value in step S14 (moving speed control means 6).

As a result of the comparison, if it is larger than the predetermined value, the above operation is executed in the first speed mode (slow speed mode) in step S15. If it is smaller, the operation is executed in the second speed mode (standard speed mode) in step S16. In this embodiment,
Although an example in which the predetermined value is set to one kind and the magnitude is compared with the predetermined value is shown, it is also possible to set the predetermined value to two or more kinds and compare the magnitudes with each other so as to appropriately execute the speed mode of three or more kinds. is there.

On the other hand, the operation switch 9 is not operated in step S13, and the time up of step S14 (step S14
If it is determined that the operation is not performed after 1), the flow after step S3 is executed as in the case of FIG. 9, and therefore the description thereof is omitted here.

As described above, according to the second embodiment of the present invention, the moving speed of the controlled movable part such as the seat or the backboard sheet is controlled according to the distance to the target position and according to the condition of the patient. However, if this control is used in combination with the control of the first embodiment, it is possible to realize a fine shock relief to the patient at the time of starting, during steady movement, and at the time of stopping, and to improve the efficiency of medical treatment. Can be planned.

Although the disclosed technology of the present invention is preferably applied to medical and especially dental medical equipment, it goes without saying that it is also applied to otolaryngological medical tables and other medical tables. . Furthermore, the technical idea of the present invention is also preferably applied to a treatment chair for physical and beauty treatment.

[0101]

According to the present invention, when the controlled movable portion is moved up and down or raised and lowered to move to the target position, the acceleration is gradually increased at the time of starting, and then gradually decreased to reduce the moving speed. Since the control is performed so as to reach the predetermined maximum speed, there is no impact at the time of starting the movement, and the patient can receive the treatment without feeling any fear (claims 1, 3, 9).

Further, even when the movement is stopped, the same shock absorbing function as described above is exerted, so that the patient on the medical examination table 1 is extremely comfortable to sit or lie on the medical examination table from the start to the stop. It is particularly suitable for treating the elderly and children (claims 1, 2, 3, 9).

Since the above-mentioned shock absorbing function is realized by the structure of the hydraulic valve of the hydraulic mechanism and the rotation speed control of the servo motor for operating this hydraulic valve, the system can be constructed extremely simply and compactly. It is possible (claims 4, 5, 6, 7, and 8).

According to the second embodiment of the present invention, when controlling the movement of the seat or the backboard seat to the target position preset according to the purpose of treatment and diagnosis, the seat is adjusted according to the distance to the target position. Since the moving speed of the seat or backboard seat is variably controlled, it is possible to improve the treatment efficiency by setting the threshold value in advance so that the high speed mode is executed when the separation distance is large. (Claims 10, 11, 12 and 17).

Further, in the case where the patient type selection switch is provided, by operating the selection switch according to the type of patient, the speed is prioritized according to the patient, and the movement speed is prioritized for safety. (Claim 1
2).

Furthermore, in the structure in which the safe speed mode can be executed by operating the specific speed selection switch, the inertial impact on the patient is alleviated and the elderly person, the child, the care recipient and the like are given a fear. Therefore, it is possible to carry out detailed treatment and medical treatment according to the patient's condition with an emphasis on safety (claim 13).

Furthermore, if these operating speed modes are set in advance in accordance with the operating state (operating time or operating pressure) of the operating switches for raising or lowering or raising or lowering the seat or backboard seat. The operator can execute the above-mentioned operation in a desired speed mode by looking at the condition of the patient or in consideration of the medical treatment mode at that time, and it is possible to respond flexibly (claims 14, 15, 1).
6).

The control according to the first embodiment of the present invention,
If the control according to the second embodiment is used together, the impact on the patient can be mitigated and the medical treatment can be made more efficient, and the usefulness thereof is further improved (claim 18).

[Brief description of drawings]

FIG. 1 is a side view showing a case where a medical examination table of the present invention is a dental examination table.

FIG. 2 is a circuit diagram of a hydraulic mechanism according to the first embodiment of the present invention.

FIG. 3 is a schematic perspective view of a hydraulic valve used in the circuit.

FIG. 4 is a transverse sectional view of the same.

FIG. 5 is a transverse sectional view showing the operating state thereof,
(A) shows that the outward valve hole is open, and (b) shows that the backward valve hole is open. It is a figure which shows one Example of the operation pattern of a controlled movable part.

FIG. 6 is a diagram illustrating a speed change pattern, an acceleration change pattern, and an opening / closing operation pattern of a hydraulic valve in association with a lifting operation of the seat in association with each other.

FIG. 7 is a diagram showing various lifting / lowering operation patterns of the seat.

FIG. 8 is a block diagram of an example for executing operation control of the second exemplary embodiment of the present invention.

FIG. 9 is a flowchart of the same embodiment.

FIG. 10 is a flowchart of another example of the operation control according to the same embodiment.

FIG. 11 is a diagram showing an example of an operation pattern of the controlled movable unit.

FIG. 12 is a flowchart of yet another example of the operation control of the same embodiment.

[Explanation of symbols]

1 Clinic 11 seats seat 12 Backboard sheet 6 Moving speed control means 7 Threshold setting means 8 Patient type selection switch (specific speed selection switch) 11a, 12a sensor means 9 Operation switch 91 detection means 100, 200 Hydraulic mechanism (elevating mechanism, undulating mechanism) 101, 201, 301 Hydraulic valve 104 valve rod 105 valve body 101a, 201a, 301a Forward valve hole 101b, 201b, 301b Return valve hole 101c, 101d, 101e, 101f counterbore 105a, 105c Inlet port 105b, 105d Exit port

Continued front page    (72) Inventor Miichi Furuta             680 Higashihamanancho, Fushimi-ku, Kyoto-shi, Kyoto             Morita Manufacturing Co., Ltd. (72) Inventor Hashimoto, S.             680 Higashihamanancho, Fushimi-ku, Kyoto-shi, Kyoto             Morita Manufacturing Co., Ltd. F-term (reference) 4C341 MM08 MM11 MN03 MP02 MP05                       MQ02 MQ07 MQ08 MR03 MR05                       MS04

Claims (18)

[Claims] 1. A function of controlling movement of a controlled movable part including a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall. In the medical care device, when moving the controlled movable part by moving up and down or up and down, the acceleration is gradually increased at the time of starting, and then the acceleration is gradually decreased to bring the moving speed to a predetermined maximum speed. A medical examination apparatus for medical use, comprising control means for controlling to reach. 2. The control means according to claim 1, further comprising a step of gradually increasing the deceleration and then decreasing the deceleration at the time of stoppage of stopping the controlled movable part from the moving state at the maximum speed to the target position. A medical examination apparatus for medical use, characterized in that the moving speed is controlled to be zero when the controlled movable part reaches a target position by gradually decreasing the speed. 3. The medical examination apparatus according to claim 1 or 2, wherein the controlled operating unit is automatically controlled to move to a target position preset according to a moving purpose. . 4. The operation according to claim 1, 2 or 3, wherein the mechanism for moving up and down or up and down comprises a hydraulic mechanism, and the acceleration and / or deceleration control is an operation for operating the hydraulic mechanism. This is done by controlling the opening and closing of a hydraulic valve arranged in the middle of the oil supply line, and the hydraulic valve is provided with a valve body and a valve hole that is inserted into the valve body and is orthogonal to the axial direction of the body. And a valve rod axially rotated between a position where the hydraulic oil inlet port and the outlet port of the valve body are communicated by the valve hole and a position where the valve hole is sealed, The medical examination apparatus is characterized in that a peripheral portion of the valve rod is provided with a counterbore portion which extends from the sealing position to the valve hole and which communicates with the valve hole and gradually increases an opening cross-sectional area thereof. 5. The valve according to claim 4, wherein when the operating oil inlet port and the outlet port are changed from the sealed state to the open state, the valve rod is axially rotated to move from the counterbore portion to the operating oil supply / discharge port. Communication is started, and subsequent axial rotation of the valve rod causes the valve hole to communicate with the inlet port and the outlet port, while the valve rod is moved from the open state to the sealed state by pressing the valve rod as described above. A medical treatment device for medical use, which is characterized in that the shaft is rotated in the opposite direction. 6. The valve hole according to claim 4, wherein two inlet ports and two outlet ports for the hydraulic oil corresponding to the valve hole are formed along the axial direction of the valve rod. And the return path is configured such that when the forward path is open, the return path is closed, when the return path is open, the return path is closed, and both are closed at the same time. Medical treatment equipment characterized by the above. 7. The valve hole according to claim 4, wherein the valve hole bends at an obtuse angle at the axial center position of the valve rod, and the inlet port and the outlet port of the hydraulic oil have a bending angle of the valve hole. A medical treatment device for medical use, which is formed at a matching position. 8. The shaft rotation of the valve rod according to claim 4, wherein the shaft rotation of the valve rod is made by a servo motor or a stepping motor, and the shaft rotation speed of the valve rod is made variable by the servo motor or the stepping motor. Medical treatment equipment characterized by the above. 9. The medical examination apparatus according to claim 3, wherein the medical examination apparatus is a dental examination apparatus, and the movement target position of the controlled movable part is a patient according to a position control mode specified according to the purpose of movement interruption. The medical examination apparatus is characterized in that it is set at any one of an entrance / exit position, a treatment position, and a gargling position. 10. A controlled movable part including a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall in advance according to the purpose of movement. In a medical examination apparatus having a function of controlling movement to a designated target position, when moving the controlled movable part to a target position by elevating or undulating the controlled movable part, the moving speed of the controlled movable part is The medical examination apparatus is characterized in that it is variably controlled according to the separation distance to the. 11. The threshold value setting means for setting a threshold value for varying the moving speed, the sensor means for detecting the current position of the controlled movable part, and the sensor according to claim 10. The distance to the target position is measured according to the position information of the controlled movable part detected by the means, and when the distance exceeds the predetermined threshold, the moving speed is executed in the high speed mode. And a moving speed control means for executing the moving speed in the low speed mode when the moving speed is smaller than the set predetermined threshold value. 12. A controlled movable part comprising a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall in advance according to the purpose of movement. In the medical treatment device having the function of controlling the movement to the designated target position, the patient type selection switch and the movement of the controlled movable part to the target position are changed to the type of the patient selected by the patient type selection switch. And a moving speed control means for executing the operation in a predetermined speed mode. 13. A controlled movable part, which comprises a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall, is preset according to the purpose of movement. In a medical examination device having a function of controlling movement to a target position, threshold setting means for setting a threshold for varying the moving speed of the controlled movable part to the target position, and A sensor means for detecting the current position of the control movable part, a specific speed mode selection switch, and when the specific speed mode selection switch is not operated, the sensor means detects the position of the controlled movable part detected by the sensor means. , Measure the separation distance to the target position,
When the separation distance exceeds the predetermined threshold value,
When the moving speed is executed in the high speed mode and is smaller than the set predetermined threshold value, the moving speed is executed in the low speed mode, while the threshold value is set when the specific speed mode selection switch is operated. Regardless of the above, there is provided a moving speed control means for executing the moving speed to the target position with respect to the controlled movable portion in a preset safe speed mode, the medical examination apparatus. 14. A controlled movable part, which comprises a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall, is preset according to the purpose of movement. In a medical examination apparatus having a function of controlling movement to a controlled target position, an operation switch for operating the controlled movable section, a detection means for detecting an operation state of the operation switch, and the controlled movable section. And a moving speed control means for causing the moving to the target position in a predetermined speed mode according to the detection result of the detecting means. 15. The medical examination apparatus according to claim 14, wherein the operation state is time, and the detection means detects an operation time of the operation switch. 16. The medical examination apparatus according to claim 14, wherein the operation state is pressure, and the detection means detects the pressing force of the operation switch. 17. The medical examination apparatus according to claim 10, wherein the medical examination apparatus is a dental examination apparatus, and the movement target position of the controlled movable part is specified according to the movement purpose of the dental examination apparatus. Depending on the position control mode
A medical examination apparatus characterized by being set at any one of a patient entrance / exit position, a treatment position, and a gargling position. 18. A controlled movable part, which comprises a seat seat supported on a base so as to be able to move up and down, and a back plate seat connected to one end of the seat seat so as to be able to rise and fall, is preset according to the purpose of movement. In a medical examination apparatus having a function of controlling movement to a designated target position, the movement control is the movement control according to any one of claims 1 to 9 and the movement according to any one of claims 10 to 17. A medical examination apparatus characterized by being used in combination with control.