JPH0515461B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a control device for a treatment table device used in dental treatment and the like. <Conventional technology> In the case of a dental treatment table device for dental treatment,
A treatment table chair that can be adjusted in various ways, a treatment handpiece, etc. are arranged near the chair, as shown in FIG. 2. In this device, the height of the seat 2, the inclination of the backrest 3, and the footrest 4 of the treatment table chair 1 are adjusted in consideration of ease of treatment for the operator (doctor) and comfort of the patient while sitting. The height, length, etc. of the hanger 6 are configured to be adjustable, and the hanger 6 on which the therapeutic handpiece 5 is set is attached to a DI table 7, etc., and the DI table 7 is attached to a standing pole 8. It is mounted so that it can rotate freely in the horizontal direction. During treatment (when in use), the seat section 2 is raised by operating the set switch, the backrest 3 is simultaneously lowered, and the footrest 4 is pulled up.
In addition, the telescopic rest portion 4a is extended, and the patient is placed on his back. In this state, the operator (doctor) removes the handpiece 5 from the hanger 6, depresses the foot switch 9 on the floor as appropriate, adjusts the driving force, and performs treatment. On the other hand, when no treatment is being performed, the reset switch is operated to move each part in the opposite direction to the above-described direction and bring it to a stop position. <Problems to be Solved by the Invention> However, in such a treatment table device, for example, if the treatment table chair 1 goes up or down for some reason during treatment, the positional change of the chair 1 may cause the operator to The hand of the hand piece 5 gets out of order, and the cutting tool at the tip of the hand piece 5 digs into the gums, or the hand piece 5 gets stuck on the seat 2 side of the chair 1.
When the back crest 3 rises while the DI table 7 is being pulled, the back crest 3
If the chair 1 is lowered without the telescopic rest portion 4a of the footrest 4 being retracted, the footrest 4 may be strongly pressed against the floor and may be damaged. There is, and it is extremely dangerous. For this reason, preferably, when the handpiece 5 is used, that is, when the foot switch 9 is depressed, the driving of the treatment table chair 1 is stopped, and a limit switch (hanger switch) 10 for emergency stop is provided at the tip of the hanger 6, or A limit switch (step switch) 11 for emergency stop is provided at the tip of the telescopic rest portion 4a of the footrest 4, and the operation of the treatment table chair 1 can be stopped by the detection operation of each of these limit switches 10, 11.
This is necessary from the standpoint of risk prevention. In addition, if either the set switch or the reset switch is operated, and the other switch is operated due to an error, etc., the operation of the treatment table chair 1 will be changed for the sake of safety for this type of device. It is preferable to stop. The present invention has been made in response to such demands, and aims to achieve this objective with a relatively simple configuration. <Means for Solving the Problems> One of the aspects of the present invention is a driving means for a treatment table chair, a set drive circuit for driving the treatment table chair by a set switch, and a set drive circuit for driving the treatment table chair by a reset switch. In a dental treatment table apparatus equipped with a reset drive circuit for resetting and driving, an emergency stop circuit having a plurality of emergency stop switches connected in series is provided in a common control line between the set drive circuit and the reset drive circuit. Another feature of the present invention is that, in addition to the emergency stop circuit, a set switch or reset switch redundant operation stop circuit is provided between the set drive circuit and the reset drive circuit. <Function> Therefore, when using the handpiece or in an emergency, if any of the emergency stop switches is operated, the drive of the set drive circuit or reset drive circuit is stopped, and unexpected danger is prevented. Avoided. Furthermore, even if one of the set switch or reset switch is operated by mistake and the other switch is operated by mistake, the drive of the set drive circuit or reset drive circuit is stopped and it is safe. <Example> FIG. 1 shows an example of a control device for a dental treatment table and chair device according to the present invention. In the figure, 20 is a drive means (motor) for the treatment table chair, 21 is a set drive circuit for driving the treatment table chair to set (e.g., raised) by a set switch 22, and 23 is a reset drive circuit for driving the treatment table chair by a reset switch 24. For example, it is a reset drive treatment that causes lower end drive. Here, the set drive circuit 21 includes a diode
D ₁ , transistor Tr ₁ , transistor Tr ₂ ,
Zener diode ZD, transistor Tr ₃ ,
Light emitting diode LED ₁ , phototransistor
PTr ₁ and relay L ₁ , and the reset drive circuit 23 includes a diode D ₂ and a transistor.
Tr ₁ , transistor Tr ₂ , Zener diode
ZD, transistor Tr ₄ , light emitting diode
It consists of LED ₂ , phototransistor PTr ₂ , and relay L ₂ . In both these circuits 21 and 23,
The portion including the transistor Tr ₁ , the transistor Tr ₂ , and the Zener diode ZD forms a common control line 25 . This common control line 25 includes an emergency stop circuit 2
6 is provided. This emergency stop circuit 26 consists of a transistor Tr ₅ and a plurality of emergency stop switches SW 1 to SW ₃ connected in series, and more specifically,
Connect the base side of transistor Tr ₅ to power line 27
While connecting the part to the above switch SW _1~3
The collector side is connected to the common control line 25, and the emitter side is grounded. These emergency stop switches SW _{1 to 3} are normally closed switches, and their specific examples are as follows:
To explain with reference to FIG. 2 mentioned above, the foot switch 9 that is depressed while using the hand piece 5
(switch SW ₁ ), one that corresponds to the hanger switch 10 provided on the hanger 6 for supporting the handpiece (switch SW ₂ ), and one that corresponds to the step switch 11 provided on the telescopic rest portion 4a of the footrest 4. (Switch SW ₃ ) etc. The above set drive circuit 21 and reset drive circuit 2
3, there are circuits 28 and 29 for stopping when the set switch 22 or reset switch 24 is operated repeatedly.
is provided. The redundant operation stop circuit 28 is for a set drive circuit, and includes a transistor _Tr6 .
Its base side is connected to the input side of the reset switch 24 of the reset drive circuit 23, its collector side is connected to the base side of the transistor Tr ₃ of the set drive circuit 21, and its emitter side is grounded. on the other hand,
The redundant operation stop circuit 29 is for the reset drive circuit, and includes a transistor _Tr7 , whose base side is connected to the input side of the set switch 22 of the set drive circuit 21, and whose collector side is connected to the input side of the set switch 22 of the set drive circuit 21.
It is connected to the base side of transistor Tr ₄ of No. 3, and the emitter side is grounded. Therefore, in the device of the present invention, first, when all of the emergency stop switches SW _{1 to SW 3} are closed (when there is no emergency situation), when the set switch 22 is closed and turned on, the diode D ₁ is turned on.
Through the set switch 22, the input signal of the set switch 22 is applied to the base of the transistor _Tr1 , and the transistor _Tr1 is turned on. Transistor Tr ₁
When turned on, transistor Tr ₂ is turned on, and by the action of Zener diode ZD, a constant voltage output is applied to light emitting diode LED ₁ and light emitting diode
Applied to LED ₂ . On the other hand, the set switch 22
turns on, its input signal is turned on by the transistor
Since the voltage is also applied to the base side of Tr ₃ , the relevant transistor Tr ₃ is turned on, and this transistor
When Tr ₃ is energized, only the light emitting diode LED ₁ emits light. Due to this light emission, the phototransistor PTr ₁ is energized from the power supply line 27, so that the relay L ₁ is energized and the contact 20a on the rising side of the drive motor 20 is closed. As a result, the treatment table chair is raised. At this time, the backrest falls down in a preset manner, the footrest is pulled up, and the telescopic rest portion at the tip is extended. Incidentally, this increase is performed only while the set switch 22 is on, and stops when the set switch 22 is turned off. Conversely, when the reset switch 24 is closed and turned on, the input signal of the reset switch 24 is applied to the base of the transistor Tr 1 through the diode D ₂ , and similarly to the above, the input signal of the reset switch 24 is applied to the base of the transistor Tr ₁ .
Tr ₁ turns on. When the transistor Tr ₁ is turned on, the transistor Tr ₂ is turned on, and a constant voltage output is applied to the light emitting diode LED ₁ and the light emitting diode LED ₂ by the action of the Zener diode ZD. On the other hand, when the reset switch 24 is turned on, the input signal is also applied to the base side of the transistor Tr _{4 .}
is turned on, and by energizing this transistor Tr ₄ , only the light emitting diode LED ₂ emits light.
This light emission energizes the phototransistor PTr ₂ from the power line 27, so the relay
_L2 is energized and the contact 20b on the lowering side of the drive motor 20 is closed. As a result, the treatment table chair is lowered. At this time, the backrest rises, the footrest is pulled down, and the telescopic rest portion at the tip is pulled back in a preset manner.
Note that this lowering is performed only while the reset switch 24 is on, and stops when the reset switch 24 is turned off. During either the rising or falling operation, if any of the emergency stop switches SW 1 to SW ₃ are closed as described above, the base side of the transistor Tr ₅ of the emergency stop circuit 26 is grounded, so the relevant Emergency stop circuit 26 does not work. However, when any of the emergency stop switches SW _{1 to SW 3} is operated and opened, the grounding of the base side of the transistor Tr ₅ is released in the emergency stop circuit 26, so that the voltage from the power supply line 27 is applied to the transistor Tr. The transistor _{Tr 5} is applied to the base side of the transistor Tr 5, and the transistor Tr ₅ is turned on. This results in
The voltage on the base side of the transistor Tr ₁ in the common control line 25 drops, and the transistor Tr ₁ is turned off. In other words, the operation of the set drive circuit 21 or the reset drive circuit 23 is stopped. Therefore, even if the set switch 22 or the reset switch 24 is inputted for some reason or by mistake while the handpiece is in use and the emergency stop switch SW ₁ linked to the foot switch is opened, the treatment table will not be activated. The chair does not go up or down. Furthermore, when the emergency stop switch SW ₂ of the hanger is activated, the driving of the treatment table chair, that is, the raising of the backrest is immediately stopped, so that damage to the Higer, ID table, etc. is not caused. Furthermore, when the footrest emergency stop switch SW ₂ is activated, the treatment table chair is also driven.
That is, the retraction of the footrest is immediately stopped,
Damage to the footrest is avoided. On the other hand, if the reset switch 24 is operated by mistake during the set drive (upward drive) by operating the set switch 22, the transistor Tr ₆
Since the input voltage from the reset switch 24 is applied to the base side of the transistor Tr6, the transistor _Tr6 is turned on. Transistor Tr ₆ due to this turning on
As a result of current flowing between the collector and emitter of the transistor Tr3, the base voltage of the transistor _Tr3 of the set drive circuit 21 drops, and the transistor _Tr3 is turned off. This stops light emitting diode LED ₁ from emitting light,
Eventually, the drive of the set drive circuit 21 is stopped.
Conversely, if the set switch 22 is operated by mistake during the reset drive (lowering drive) by operating the reset switch 24, the transistor _Tr7
Since the input voltage from the set switch 21 is applied to the base side of the transistor Tr7, the transistor _Tr7 is turned on. As a result of this turning on, current flows between the collector and emitter of the transistor Tr ₇ , which causes the base voltage of the transistor Tr ₄ of the reset drive circuit 23 to drop, turning off the transistor Tr ₄ . This stops light emitting diode LED ₂ from emitting light,
Eventually, the drive of the set drive circuit 23 is stopped. In other words, if the other switch is operated while either the set switch 21 or the reset switch 24 is being operated, the corresponding set drive circuit 2
1 or the drive of the reset drive circuit 13 is automatically stopped. Therefore, it is extremely safe. In the above embodiment, the driving means for the treatment table chair is a motor, but the present invention is not limited to this, and the electromagnetic valve may be controlled by relays L1 _{, 2} instead of a hydraulic device. is also possible. <Effects of the Invention> As described above, the control device for a dental treatment table device of the present invention has an extremely simple configuration, is provided with an emergency stop circuit, and when any of the emergency stop switches is operated, Since the drive of the set drive circuit or reset drive circuit is stopped, there is no need for unexpected lifting and lowering of the treatment table chair, and the operator can concentrate on treatment with a high level of safety. Since it is equipped with an emergency stop circuit as well as a stop circuit for double operation of the set switch or reset switch, damage to the device is automatically prevented even in careless handling, making it safe and extremely advantageous in use. Note that the dental treatment table device of the present invention includes not only a so-called dental treatment table device in a narrow sense, but also a treatment table device for otorhinolaryngology, which requires a treatment table chair similar to that used for dental patients. .

[Detailed description of the invention]

FIG. 1 is a wiring diagram showing one embodiment of a control device for a dental treatment table apparatus according to the present invention, and FIG. 2 is a side view schematically showing the dental treatment table apparatus. In the figure, 20... Driving means for the treatment table chair, 21... Set drive circuit, 22... Set switch, 23... Reset drive circuit, 24... Reset switch, 25
...Common control line, 26...Emergency stop circuit, 28...
Duplicate operation stop circuit, 29...Double operation stop circuit, SW _1-3 ...Emergency stop switch, Tr _1-7 ...Transistor.

Claims (1)

[Scope of Claims] 1. A dental device comprising a driving means for a treatment table chair, a set drive circuit for setting and driving the treatment table chair by a set switch, and a reset drive circuit for driving the treatment table chair to reset by a reset switch. In the treatment table device, a common control line between the set drive circuit and the reset drive circuit,
An emergency stop circuit having a plurality of emergency stop switches connected in series is provided, and when any of the emergency stop switches is operated, driving of the set drive circuit or the reset drive circuit is stopped. Control device for dental treatment table equipment. 2. A dental treatment table apparatus comprising a driving means for a treatment table chair, a set drive circuit for driving the treatment table chair to set by a set switch, and a reset drive circuit for driving the treatment table chair to reset by a reset switch, On the common control line between the set drive circuit and reset drive circuit,
An emergency stop circuit having a plurality of emergency stop switches connected in series is provided, and when any of the emergency stop switches is operated, driving of the set drive circuit or the reset drive circuit is stopped, and
A circuit for stopping when the set switch or reset switch is operated repeatedly is provided between the set drive circuit and the reset drive circuit, and when the set switch or reset switch is operated while another switch is operated, the set drive is stopped. 1. A control device for a dental treatment table device, characterized in that driving of a circuit or a reset drive circuit is stopped.