JP3737682B2 - Lock device for barber chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a chair capable of rotating, raising and lowering and tilting the backrest, such as a hairdressing and beauty chair, and the like. The chair can be rotated and locked with a single pedal, and the chair can be lifted and lowered. The present invention relates to a lock device in a hairdressing and beauty chair or the like that is automatically locked so that the chair is not rotated during tilting.
[0002]
[Prior art]
A hydraulic circuit of a hairdressing and beauty chair in which the entire chair is rotated and locked in the left-right direction, the entire chair is raised and lowered, and the backrest can be raised and lowered will be described with reference to FIG.
1 is a lock cylinder for supplying and locking when a lock switch (not shown) is operated in order to stop the rotation of the entire chair, and 2 is a hydraulic cylinder supplied and operating when a lift switch (not shown) is operated. Lifting cylinder, which is lowered by the weight of the chair when a lowering switch (not shown) is operated, 3 is operated by operating a backrest standing switch (not shown), hydraulic pressure is supplied to raise the backrest, and operating a prone switch (not shown) Then, it is a backrest cylinder that falls down by the spring force of the spring. In general, foot switches are used as the switch for raising and lowering the chair and the switch for locking the rotation.
[0003]
Reference numerals 4 and 5 denote unlocking and locking solenoid valves connected to the lock cylinder 1, reference numerals 6 and 7 denote lowering and raising solenoid valves connected to the lifting cylinder 2, and reference numerals 8 and 9 denote the above-described solenoid valves. A prone electromagnetic valve and a standing electromagnetic valve connected to a backrest cylinder. The electromagnetic valves 4 and 5 for locking are used for unlocking and locking switches, the electromagnetic valves 6 and 7 for raising and lowering are used for lowering and raising switches, and the electromagnetic valves 8 and 9 for backrest are used for lying down. The switch and the standing switch are connected to each other.
[0004]
10 is a relief valve for maintaining the pressure in the hydraulic circuit at a set value, 11 is a check valve that allows only oil from one direction to pass through, and 12 is an oil tank that is separated into a plurality of locations. However, it is actually one oil tank. 13 is a motor pump for supplying the oil in the oil tank 12 to the cylinders 1 to 3 through the electromagnetic valves 5, 7, and 9, and 14 is for removing dust mixed in the oil in the hydraulic circuit. It is a filter to do.
[0005]
Next, the operation of the hydraulic circuit described above will be described. To raise the entire lowering chair, when a foot switch for lifting (not shown) is depressed, the lifting electromagnetic valve 7 is switched from the state shown in the drawing, and the motor pump 13 Is supplied into the lift cylinder 2 via the lift solenoid valve 7 and the check valve 11, and the chair starts to lift. When the foot is released from the lifting foot pedal at a desired position, the lifting electromagnetic valve 7 returns to the state shown in the figure and the lifting is stopped.
[0006]
On the other hand, in order to lower the rising chair, when a lowering foot switch (not shown) is depressed, the lowering electromagnetic valve 6 is switched from the state shown in the figure, and the oil in the lifting cylinder 2 is lowered by the weight of the chair. Since it is returned to the tank 12 through the valve, the descent starts. When the foot is released from the lowering foot pedal at a desired position, the lowering electromagnetic valve 6 returns to the state shown in the figure, and the lowering of the chair is stopped at that position.
[0007]
In order to raise and lower the backrest, the backrest can be raised and lowered by the same operation as the raising and lowering operation of the chair by operating a raising and lowering switch generally installed on the side of the chair.
[0008]
Furthermore, in order to explain the operation of making the rotation of the chair free or locking, the structure for making the rotation of the chair free or locked is generally composed of a disk that rotates with the chair and a lock rod, The lock rod is protruded or retracted by the lock cylinder 1.
[0009]
Then, the lock rod fitted to the disc is switched from the state shown in the figure by depressing the unlocking foot pedal, and the oil in the lock cylinder is returned into the tank 12 via the unlocking electromagnetic valve 4. When the lock rod is retracted from the disk, the rotation of the chair becomes free. Further, when the lock foot pedal is depressed after the chair is rotated, the lock electromagnetic valve 5 is switched from the state shown in the figure, and the oil from the tank 12 is supplied into the lock cylinder 1 via the lock electromagnetic valve 5. The lock rod is fitted to the disc, and the rotation of the chair is stopped.
[0010]
[Problems to be solved by the invention]
By the way, the above-described conventional rotation and locking of the entire chair is performed by foot pedal operation. Therefore, if the chair is moved up and down and the undulation of the backrest is performed without the rotation locked, There is a possibility that the chair rotates when the backrest is undulated, so that the patient may fall from the chair or the operator may be involved in the rotation of the chair and get injured.
[0011]
Moreover, in order to rotate and lock the chair, a dedicated switch is required, and since two hydraulic valves are required for the hydraulic circuit of the chair rotation lock, the hydraulic circuit becomes complicated and the cost is high. At the same time, there is a problem that it is easy to break down due to its complexity.
[0012]
The present invention is intended to solve the above-described problems, and the object of the present invention is to lock the chair automatically when the chair moves up and down and when the backrest is raised and lowered. Because the chair does not rotate carelessly, the lock device in the barber and beauty chair, etc. that can protect the patient and practitioner from the risk of injury etc. It is in.
[0013]
[Means for Solving the Problems]
The lock device in the hairdressing and beauty chair of the present invention is intended to achieve the above-mentioned purpose, and the means is provided on the disk by causing the lock rod of the lock cylinder to protrude from the disk rotating together with the chair. In a lock device for a hairdressing and beauty chair or the like which is prevented from rotating by being engaged, a chair raising electromagnetic valve and a backresting electromagnetic valve connected in parallel to a motor pump, and the chair raising electromagnetic valve The chair lowering solenoid valve connected in series via the chair check valve for passing the chair oil, and the chair lifting cylinder connected to the connection point between the chair check valve and the chair lowering solenoid valve A backrest solenoid valve connected in series through a backrest check valve that allows oil from the backrest standing solenoid valve to pass therethrough, and the backrest check valve and the backrest prone With solenoid valve A backrest raising / lowering cylinder connected to the motor pump, the chair raising solenoid valve connected in parallel to the motor pump, and a lock check that allows oil from the motor pump to pass upstream from the backrest standing solenoid valve A lock cylinder connected via a valve, a lock release solenoid valve connected to a connection point between the lock check valve and the lock cylinder, and a connection between the lock check valve and the motor pump. And a throttle valve connected to each of the electromagnetic valve for raising the chair and the electromagnetic valve for raising the backrest on the downstream side of the point, and oil from the motor pump is used for raising the electromagnetic valve for raising the chair and for raising the backrest. When the flow to the solenoid valve for flow is restricted by the throttle valve connected thereto, the oil for the lock cylinder is oiled via the lock check valve. Flow, thereby locking rod, characterized in that the rotation of the chair engaged in a disc is prevented.
[0014]
Further, in a lock device in a hairdressing and beauty chair or the like which is engaged with the disk by preventing the lock rod of the lock cylinder from protruding with respect to the disk rotating together with the chair, the motor pump A solenoid valve for raising the chair and an electromagnetic valve for raising the backrest connected in parallel, and a solenoid valve for lowering the chair connected in series via a check valve for the chair that allows oil from the electromagnetic valve for raising the chair to pass through, A chair lifting cylinder connected to a connection point between the chair check valve and the chair lowering solenoid valve and a backrest check valve through which oil from the backrest standing solenoid valve passes are connected in series. Connected in parallel to the motor pump, the connected backrest solenoid valve, the backrest cylinder that is connected to the connection point between the backrest check valve and the backrest solenoid valve, For raising the chair A locking cylinder connected to the magnetic valve and an upstream side of the back upright solenoid valve via a locking check valve that allows oil from the motor pump to pass; the locking check valve; and the locking cylinder; The electromagnetic valve for unlocking connected to the connection point of, and the connection point of the electromagnetic valve for raising the chair and the electromagnetic valve for raising the backrest on the downstream side from the connection point of the check valve for locking and the motor pump The flow restriction is performed by the throttle valve when oil from the motor pump flows to the chair raising electromagnetic valve and the backresting electromagnetic valve. Oil flows into the lock cylinder through the lock check valve, whereby the lock rod is engaged with the disc and rotation of the chair is prevented.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a locking device in a barber / beauty chair according to the present invention will be described with reference to the drawings. Note that the same reference numerals as those of the conventional example described above denote the same members, and a description thereof will be omitted.
The difference between the above-described conventional and the embodiment of the present invention is that the locking electromagnetic valve 5 is deleted, and the connection point a for connecting the chair raising electromagnetic valve 7 and the backrest standing electromagnetic valve 9; The only difference is that a throttle valve 15 is interposed between the oil supply branch point b to the lift cylinder 2 and the oil supply branch point c to the backrest and rise cylinder 3. Instead of the two throttle valves 15, one throttle valve 15 may be interposed at a position indicated by a dotted line.
[0016]
Next, a description will be given electric circuit for controlling the driving of each electric magnetic valve 4,6～9 and motor pump 13 that put the hydraulic circuit shown in FIG. In this circuit, the same reference numerals as those in FIG. 1 denote the same members.
S9 is a switch for standing on the back and S8 is a switch for lying on the back, and it is installed on the side of the armrest of the chair.
[0017]
In many cases, S7 is a switch for raising the chair, and S6 is a switch for lowering the chair, which is a foot switch installed on the base of the chair. S4 is a lock release switch that enables rotation of the chair, which is also installed on the base of the chair, and S5 is a lock switch that prevents rotation of the chair.
[0018]
R9 is a relay (coil) connected in series to the backrest standing switch S9, R8 is a relay (coil) connected in series to the backrest lying down switch S8, and R7 is the chair lifting switch A relay (coil) connected in series to S7, R6 is a relay (coil) connected in series to the chair lowering switch S6, and R4 is a relay connected in series to the unlocking switch S4 ( Coil) and R13 are relays (coils) for driving the motor pump 13.
[0019]
r9 is a contact point of the relay R9 connected in series to the electromagnetic valve 9 for standing up, r8 is a contact point of the relay R8 connected in series to the electromagnetic valve 8 for lying down, and r7 is a contact point of the relay electromagnetic valve 7 connected in series. Contact of relay R7, r6 is contact of relay R6 connected in series to descending electromagnetic valve 6, r4 is contact of relay R4 connected in series to unlocking solenoid valve 4, and r13 is connected in series to motor pump 13 The contact point of the relay R13. D is a diode for preventing backflow, and E is an AC power source.
[0020]
Next, the operation will be described based on the above-described configuration. For example, when the chair is in the lowered state and the backrest is in the standing state, for example, when the foot switch is depressed to close the switch S7 for raising the chair, the chair is raised. When the coil of the relay R7 is energized, the contact r7 is closed and the ascending electromagnetic valve 7 is switched, and simultaneously with the energization of the coil of the ascending relay R7, the coil of the relay R7 is connected by the diode D. Since the coil of the motor pump relay R13 is also energized, the contact r13 is also closed.
[0021]
Therefore, the pressure oil from the motor pump 13 is supplied into the lift cylinder 2 via the throttle valve 15, the lift electromagnetic valve 7 check valve 11 and the filter 14, and the lift switch S7 is closed by the whole chair. It will only rise while you are.
[0022]
When the chair is raised, a throttle valve 15 is connected to a lock cylinder for locking the rotation of the chair in the hydraulic circuit of the lift cylinder 2 of the chair. Oil by the pressure corresponding to the pressure is supplied to the lock rod cylinder, and the lock rod is fitted into the disk to maintain the fixed state. Therefore, the chair does not rotate while the chair is being raised.
[0023]
Next, in order to lower the chair in the raised state, when the lowering switch S6 is depressed to close the foot pedal, the coil of the lowering relay R6 is energized and the contact r6 is closed, and the lowering electromagnetic valve 6 is opened. Further, since the coil of the motor pump relay R13 is energized simultaneously with the energization of the coil of the lowering relay R6, the contact r13 is also closed.
[0024]
When the lowering electromagnetic valve 6 is switched, the oil in the elevating cylinder 15 returns to the oil tank 12 through the filter 14 and the lowering electromagnetic valve 6, so that the chair is lowered only while the switch S6 is closed. . When the switch S6 is closed, the motor pump 13 is driven to supply pressure oil to the lock rod cylinder, so that the lock rod fits into the disk and holds the fixed state, and the chair is lowered. The chair does not rotate in the middle of being.
[0025]
Further, when the lock switch S5 is closed by depressing the foot pedal, only the motor pump relay R13 is energized and the contact r is closed, so that the motor pump 13 is not driven to rotate the chair. It becomes locked.
[0026]
Next, the operation of rotating the chair while the chair is in the raised position or the lowered position will be described. When the unlocking switch S4 is depressed by depressing the foot pedal, the coil of the unlocking relay R4 is energized. Since the contact r4 is closed, the unlocking electromagnetic valve 4 is switched.
[0027]
Accordingly, the oil in the lock cylinder 1 returns to the oil tank 12 through the filter 14 and the unlocking electromagnetic valve 4, the lock rod is retracted from the disk, and the rotation of the entire chair closes the unlocking switch R4. Only possible while you are.
[0028]
The above description of the operation has explained the raising and lowering of the chair and the rotating operation of the chair, but since the raising and lowering operation of the backrest performs the same operation as the raising and lowering of the chair, the description is omitted, The lock rod fits into the disc and keeps the chair from rotating.
[0029]
In the above description of the operation, the throttle valve 15 is connected to the chair raising electromagnetic valve 7 and the backrest standing electromagnetic valve 9, the connection point a, the oil supply branch point b to the chair lifting cylinder 2 and the back. As described above, the throttle valve 15 is connected to the oil supply branch point c to the undulation and undulation cylinder 3, but the throttle valve 15 includes a motor pump 13 that is hydraulically driven and an electromagnetic valve for raising the chair as shown by the dotted line in FIG. Even when connected between the valve 7 and the connection point a connecting the backresting electromagnetic valve 9, the same operation as described above can be obtained.
[0030]
Further, in the above-described embodiment, the one that does not connect the solenoid valve for locking has been described, but the one that connects the solenoid valve for locking may be used. It is sufficient that the lock rod is sometimes inserted into the disk and locked.
[0031]
2 is not limited to the electric circuit of FIG. 2 described above, and the control shown in the timing chart shown in FIG. 3 is performed by a control circuit such as a microcomputer to minimize the operation time of the motor pump 13. It becomes possible.
[0032]
【The invention's effect】
As described above, since the rotation of the chair is locked when the switch for raising and lowering the chair or raising and lowering the backrest is operated, the operation for locking is not necessary. Since the chair does not rotate carelessly, the patient and practitioner can be protected from dangers such as injury, and the solenoid valve on the side that supplies oil to the locking cylinder is not required. Therefore, there are effects such as cost reduction and space reduction.
[Brief description of the drawings]
FIG. 1 is a hydraulic circuit of a locking device in a barber / beauty chair and the like according to the present invention.
FIG. 2 is an electronic circuit for controlling various electromagnetic valves and motor pumps in the hydraulic circuit of the above.
FIG. 3 is a timing chart when controlled by a control circuit such as a microcomputer.
FIG. 4 is a conventional hydraulic circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Locking cylinder 2 Chair raising / lowering cylinder 3 Backrest raising / lowering cylinder 4 Unlocking solenoid valve 6 Lowering solenoid valve 7 Lifting solenoid valve 8 Falling solenoid valve 9 Standing solenoid valve 13 Motor pump 15 Throttle valve

Claims (2)

In a lock device in a hairdressing and beauty chair or the like that is engaged with the disk by projecting a lock rod of a lock cylinder with respect to a disk that rotates together with the chair, and prevents the chair from rotating,
A chair lifting electromagnetic valve and a backresting electromagnetic valve connected in parallel to the motor pump, and a chair lowering connected in series via a chair check valve through which oil from the chair lifting electromagnetic valve passes. A solenoid valve, a chair lifting cylinder connected to a connection point between the chair check valve and the chair lowering solenoid valve, and a backrest check valve through which oil from the backrest standing solenoid valve passes. A backresting solenoid valve connected in series via a backrest, a backresting cylinder connected to a connection point of the backrest check valve and the backresting solenoid valve, and the motor pump A locking cylinder connected through a lock check valve that allows oil from the motor pump to pass upstream from the solenoid valve for raising the chair and the solenoid valve for raising the backrest, which are connected in parallel, and the locking cylinder Check valve and lock An electromagnetic valve for unlocking connected to a connection point with Linda, an electromagnetic valve for raising the chair and an electromagnetic valve for raising the backrest on the downstream side of the connection point between the check valve for locking and the motor pump It consists of a throttle valve connected to each,
When the oil from the motor pump flows to the chair raising solenoid valve and the backresting solenoid valve, the flow restriction is performed by the throttle valve connected to each other, via the lock check valve. A lock device for a hairdressing and beauty chair or the like, characterized in that oil flows into the lock cylinder, whereby a lock rod is engaged with a disk to prevent the chair from rotating . In a lock device in a hairdressing and beauty chair or the like that is engaged with the disk by projecting a lock rod of a lock cylinder with respect to a disk that rotates together with the chair, and prevents the chair from rotating,
A chair lifting electromagnetic valve and a backresting electromagnetic valve connected in parallel to the motor pump, and a chair lowering connected in series via a chair check valve through which oil from the chair lifting electromagnetic valve passes. A solenoid valve, a chair lifting cylinder connected to a connection point between the chair check valve and the chair lowering solenoid valve, and a backrest check valve through which oil from the backrest standing solenoid valve passes. A backresting solenoid valve connected in series via a backrest, a backresting cylinder connected to a connection point of the backrest check valve and the backresting solenoid valve, and the motor pump A locking cylinder connected through a lock check valve that allows oil from the motor pump to pass upstream from the solenoid valve for raising the chair and the solenoid valve for raising the backrest, which are connected in parallel, and the locking cylinder Check valve and lock An electromagnetic valve for unlocking connected to a connection point with Linda, an electromagnetic valve for raising the chair and an electromagnetic valve for raising the backrest on the downstream side of the connection point between the check valve for locking and the motor pump It consists of one throttle valve connected to the connection point,
When the oil from the motor pump flows into the electromagnetic valve for raising the chair and the electromagnetic valve for raising the backrest, the restriction of the flow rate is performed by the throttle valve, so that the lock cylinder is connected via the lock check valve. A lock device for a hairdressing and beauty chair or the like, characterized in that oil flows, whereby a lock rod is engaged with a disk and rotation of the chair is prevented .

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