JP2000130005A - Door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To close a door at a desired speed. SOLUTION: A pinion 12 is fixed onto an input shaft 11 rotated together with an arm 102 turned in response to the opening and closing of a door, a spring 20 is fastened at the end section of a rack 13 constituting a rack-and- pinion mechanism together with the pinion 12, and urging force to a rack 13 for closing the door is generated by the spring 20. The rotation of the pinion 12 is transmitted to a rotor 31 through a speed-up gear mechanism composed of first and second gear mechanisms 15, 16 through one-way clutch 14 conducting transmission only when the pinion 12 is turned in the direction that the door is closed. Induced power is generated in response to the rotation of the rotor 31 and a rotation control circuit is operated while using induced power as driving power, a brake control signal BS corresponding to the difference of the rotation period of the rotor 31 and the target value of the rotation period is output to a braking circuit, and braking force to the rotor 31 corresponding to the difference of speed is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer for buffering a door closing operation.

[0002]

2. Description of the Related Art Conventionally, as a door closer, an oil type door closer is known. This oil-type door closer is composed of a cylinder and a piston containing oil and a coil spring, and automatically closes the opened door by the energy stored in the coil spring when the door is opened. It has become.

In such a type of door closer, an oil passage is provided in parallel with the cylinder, and by adjusting the size of the cross-sectional area of the passage and the flow rate of oil, the door closer is adjusted. The closing speed is adjusted.

[0004]

However, in the case of an oil-type door closer as described above, since the viscosity of the enclosed oil changes according to the temperature, the closing speed varies depending on the temperature at that time. Also, it fluctuates at the time of air-conditioning operation or the like regardless of time.

In order to avoid this, it is conceivable to adjust the closing speed of the door in accordance with, for example, the temperature. However, since the closing speed is changed by the restoring force of the coil spring, the closing operation of the door is performed. Although the overall speed can be adjusted, there is a problem that it is difficult to maintain the speed at a constant speed during the process of closing the door.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a door closer capable of controlling a door closing speed to a desired speed.

[0007]

In order to achieve the above object, a door closer according to a first aspect of the present invention has an input shaft that rotates in conjunction with opening and closing of a door, and an input shaft that rotates in a direction to open the door. Biasing means that is charged when the input shaft is closed and biases the input shaft in a direction to close the door; and a power generation speed control unit that is connected to the input shaft via a train so as to generate induced power and have a speed control function. Rotation control means driven by the power generated by the power generation control means and controlling a rotation cycle of the power generation control means to a desired speed when the input shaft is rotated in a direction to close the door. Features.

According to the first aspect of the present invention, when the door is opened, the input shaft rotates in conjunction with the opening and closing of the door, and the urging means is stored in the urging means. The door is biased in the direction to close the door, whereby the input shaft rotates in the direction to close the door, and the door is closed.

At this time, the rotation of the input shaft is transmitted to the power generation control means via the wheel train, and an induced power is generated in the power generation control means by the torque, and the rotation control means is driven by the generated induced power. Is done. Then, when the input shaft is rotated in a direction to close the door by the rotation control means,
That is, the rotation cycle of the power generation control means when the door is closed, that is, the rotation cycle of the input shaft, is controlled to an arbitrary desired speed, and the closing speed of the door is controlled to a desired speed.

Further, the door closer according to claim 2 is
The invention according to claim 1, further comprising: a clutch unit between the input shaft and the power generation speed-control unit for selecting transmission or cutoff of the torque of the input shaft, wherein the clutch unit closes a door. When rotated in the direction, the rotational force of the input shaft is transmitted to the power generation speed control means.

According to a second aspect of the present invention, a clutch means is provided between the input shaft and the power generation control means for selecting transmission or interruption of the torque of the input shaft to the power generation control means. Accordingly, only when the input shaft is rotated in the direction to close the door, the rotational force of the input shaft is transmitted to the power generation control means. That is, the induced power is generated only when the door is closed, whereby the rotation control means is activated and the speed is adjusted.

Further, in the door closer according to claim 3, in the invention according to claim 1, the rotation control means is rotated when the input shaft is rotated in a direction to open the door and in a direction to close the door. It is characterized by being driven by the power generated by the power generation control means at that time.

According to a third aspect of the present invention, for example, when an input shaft is rotated in a direction to open a door, an induced power generated by a power generation speed control means is stored, and the input shaft is stored together with the stored induced power. The input shaft was rotated in the direction in which the door was opened and in the direction in which the door was closed, for example, by utilizing the induced power generated by the power generation governing means when the was rotated in the direction in which the door was closed, as drive power for the rotation control means. At that time, that is, when the door is opened and closed, the rotation control means is driven by the power generated by the power generation control means.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be described.

FIG. 1 is an external view showing an example of a door closer according to the present invention, and FIG. 2 is a schematic configuration diagram thereof.

As shown in FIG. 1, the door closer 100 has a door closer main body 101 mounted on an upper portion of a door 201. One end of the bending arm 102 is connected to an input shaft 11 described later inside the main body 101, and the other end is attached to the structural wall 202 side.

The door closer body 101
As shown in FIG. 2, one end of the arm 102 is connected to an input shaft 11, and the input shaft 11 rotates with the arm 102. The rotation of the arm 102 transmitted to the input shaft 11 is transmitted via a pinion 12 fixed to the input shaft 11 to the pinion 12 and a rack 13 that constitutes a rack-and-pinion mechanism. The transmission is transmitted to the first gear mechanism 15 via the first gear mechanism 15 and to the rotor 31 of the power generator / governor 30 via the second gear mechanism 16 which constitutes a speed increasing gear mechanism together with the first gear mechanism 15. I have.

Further, one end of the rack 13 (for example, FIG.
The right end of the rack 20 is provided with a spring 20 to which the end opposite to the rack 13 is fixed. When the door 201 is opened, the input shaft 11 rotates clockwise in FIG. It moves to the right, that is, to the side where the spring 20 is contracted. Then, the spring 20 contracts as the rack 13 moves, and the rack 13
Is urged to the left in FIG. The one-way clutch 14 transmits the rotation to the first gear mechanism 15 only when the input shaft 11 rotates leftward in FIG. 2 and the pinion 12 rotates leftward.

The generator / governor 30 comprises a rotor 31 having a rotor magnet formed of, for example, two or more poles, and a stator 32. The stator 32 is made of a magnetic material having a high magnetic permeability such as PC permalloy. A stator coil 32b is wound around a stator main body 32a formed of a body.

As shown in FIG. 3, a braking resistor 33A is connected in series with the stator coil 32b.
Further, a brake circuit 33 configured by connecting an enhancement type N-channel MOS field effect transistor 33B as a switching element in series is connected.

The power governor 30 and the brake circuit 33
A voltage controlled oscillator (VCO) 35 is constituted by these. In the brake circuit 33, a diode may be appropriately inserted in addition to the braking resistor 33A.
When the resistance value of the stator coil 32b is large, the braking resistor 33A may be omitted.

The voltage control oscillator 35 is connected to a rotation control device 50. As shown in FIG. 3, the rotation control device 50 includes, for example, a rectifier circuit 51 that performs half-wave rectification with a diode connected to a connection point between the stator coil 32b and the drain of the field-effect transistor 33B. Charging capacitor 5 to which rectified output is supplied
2 and a voltage across the charging capacitor 52 is supplied to a rotation control circuit 60 that controls the brake circuit 33.

Here, a boosting chopper circuit is constituted by the charging capacitor 52, the stator coil 32b and the field effect transistor 33B, and supplies a voltage higher than the induced voltage of the stator coil 32b to the charging capacitor 52 and the rotation control circuit 60.

The rotation control circuit 60 outputs a crystal oscillator 61 for outputting an oscillation signal of a predetermined frequency, and oscillates the oscillation output of the crystal oscillator 61 at a desired frequency division ratio to output a target speed pulse signal Pv. An induced voltage between the stator coil 32b of the power governor 30 and the field effect transistor 33B is supplied to the programmable frequency divider 62 and the non-inverting input side,
A comparator 63 for outputting a rotation detection pulse signal Pr having a high level when the reference voltage Vref is supplied to the inverting input side and the induced voltage is equal to or higher than the reference voltage Vref and having the same cycle as the generator induced voltage; 62 the target speed pulse signal Pv is the down terminal t _D of the up rotation detection pulse signal Pr of the comparator 63 outputs each of the input count value N in BCD up terminal t _U /
It comprises a down counter 64 and a brake control circuit 65 to which the count output N of the up / down counter 64 is supplied and which controls the on / off of the field effect transistor 33B of the brake circuit 33 based on the supplied count output N.

Here, the programmable frequency divider 62 is composed of, for example, a programmable N-ary counter,
By having a bit data input terminal and inputting setting data to these data input terminals, the frequency division ratio n is set and the frequency ratio (1 / n) is determined by the combination of the selected data input terminals. A target speed pulse signal obtained by dividing the oscillation signal of the crystal oscillator 61 at the set division ratio is output. At this time, the frequency of the target speed pulse signal set to the smallest frequency division ratio is set to be lower than the frequency of the rotation detection pulse signal output from the comparator 63 when the brake circuit 33 is open, that is, when no braking is performed. ing.

The comparator 63 is configured to receive the output waveform from the voltage controlled oscillator 35 at a high impedance so as not to affect the power regulator 30.

Further, as shown in FIG. 4, a brake control circuit 65 includes a D / A converter 66 for converting the count value N output from the up / down counter 64 into an analog voltage, and a D / A converter A pulse width modulation (PWM) circuit 67 for converting the voltage output from 66 to a pulse width;
An inverter 68 for inverting the pulse output of the pulse width modulation circuit 67, and supplies an output pulse of the inverter 68 to the field effect transistor 33B of the brake circuit 33 as a brake control signal BS.

Next, the operation of the first embodiment will be described.

Now, when a person opens the door 201, the arm 102 rotates accordingly, and the input shaft 11 rotates clockwise in FIG. Then, as the input shaft 11 rotates, the rack 13 moves rightward in FIG. 2 and the spring 20 contracts, and moves the rack 13 leftward to urge the door 201 to close. At this time, the rotation of the input shaft 11 rotates the pinion 12, but since the one-way clutch 14 is interposed between the pinion 12 and the first gear mechanism 15, the one-way clutch 1
4, the rotation of the pinion 12 is not transmitted to the first gear mechanism 15.

When the person releases the door 201 from this state, the rack 13 moves leftward in FIG. 2 by the urging force of the spring 20, and the pinion 12 and the input shaft 11 rotate counterclockwise to the arm 102. Turns and door 2
01 is closed.

At this time, since the pinion 12 rotates to the left, the rotation of the pinion 12 is transmitted to the first gear mechanism 15 via the one-way clutch 14, further transmitted to the second gear mechanism 16, and The rotation is accelerated by the second gear mechanisms 15 and 16 and transmitted to the rotor 31.

As a result, an induced voltage is generated in the stator coil 32b, which is rectified by the rectifier circuit 51 to rapidly charge the charging capacitor 52.
2 is supplied as DC power to the rotation control circuit 60 as operating power.

For this reason, each part of the rotation control circuit 60 is activated, and an oscillation signal oscillated by the crystal oscillator 61 is supplied to the programmable frequency divider 62, which divides the signal into a desired frequency division ratio. The circulated target speed pulse signal Pv is supplied to the down terminal t _D of the up / down counter 64, and the induced voltage of the stator coil 32b of the power governor 30 is supplied to the comparator 63.
When the induced voltage becomes equal to or higher than the reference voltage Vref, the comparator 63 supplies a rotation detection pulse signal Pr which becomes high level and has the same period as the induced voltage of the generator to the up terminal t _U of the up / down counter 64.

At this time, when the rotor 31 rotates at a high speed due to a large restoring force of the spring 20, for example,
A high voltage and high frequency induced voltage is generated by the stator coil 32 b, and a sufficient operating power is supplied to the rotation control circuit 60 by the power supply circuit 53.

As described above, since the induced voltage generated in the stator coil 32b has a high frequency, the comparator 6
3, the frequency of the rotation detection pulse signal Pr output from the programmable frequency divider 62 is much higher than the target speed pulse signal Pv.

For this reason, the count value N of the up / down counter 64 becomes a large positive value, so that the output voltage V _N of the D / A converter 66 of the brake control circuit 65 also becomes a dashed line in FIG. 5B, the duty ratio of the pulse signal P _W output from the pulse width modulation circuit 67 is, for example, 1 as shown in FIG.
The duty ratio of the brake control signal BS becomes 87.5% as shown in FIG. 5C, which is 2.5%.
3 is supplied to the field-effect transistor 33B, so that the field-effect transistor 33B
Is turned on in a section in which is at a high level, a large braking force is generated.

The rotation of the rotor 31 is decelerated by the braking force generated by the brake circuit 33, and the rotation detection pulse signal Pr output from the comparator 63 accordingly.
Frequency also decreases.

Therefore, the count value N of the up / down counter 64 also decreases, and the output voltage of the D / A converter 66 also decreases.
The duty ratio of _W increases, and the duty ratio of the brake control signal BS output from the inverter 68 decreases.
The section in which the 3B is in the ON state is reduced, whereby the braking force is reduced, and the up / down counter 64 is driven at a constant speed at a speed corresponding to the target speed pulse signal Pv while maintaining a constant accumulated pulse amount.

Accordingly, since the rotor 31 is driven at a constant speed, the second gear mechanism 16, the first gear mechanism 15, the pinion 12, and the input shaft 11 are also driven at a constant speed. To be closed.

In this state, when the restoring force of the spring 20, that is, the urging force on the rack 13 is reduced, the rotation speed of the rotor 31 is reduced, but the frequency of the induced voltage of the stator coil 32 b is reduced in accordance with the reduction in the rotation speed of the rotor 31. Decreases, and the frequency of the rotation detection pulse signal Pr output from the comparator 63 decreases accordingly, so that the count value N of the up / down counter 64 decreases.

As a result, the duty ratio of the brake control signal BS output from the brake control circuit 65 is reduced, so that the braking force generated in the brake circuit 33 is reduced and the rotation speed of the rotor 31 is increased. The rotation speed of the second gear mechanism 16 also increases, and the first gear mechanism 1
5, since the rotation speeds of the pinion 12 and the input shaft 11 increase, the door 201 is closed at a constant speed.

At this time, if the speed at which the door 201 is closed is changed, the desired speed can be changed by changing the set value of the programmable frequency divider 62.

For example, if a person opens the door 201 while the door 201 is being closed, the input shaft 11 rotates clockwise and the pinion 12 rotates clockwise accordingly.
Since the directional clutch 14 operates and the rightward rotation of the pinion 12 is not transmitted to the first gear mechanism 15, the door 20
1 does not affect the opening operation.

Further, since the braking force generated by the brake circuit 33 is controlled based on the actual closing speed of the door 201, the braking force is always desired irrespective of the fluctuation of the air temperature or the change of the restoring force of the spring 20. The door 201 can be closed at a speed.

The input shaft 1 when the door 201 is closed
Since one rotational force is converted into electric energy and is used, it can be realized without providing a power supply.

Next, a second embodiment of the present invention will be described.

In the second embodiment, an induced voltage is generated even when the door 201 is opened. In the first embodiment, the one-way clutch 1
4, the pinion 12 and the first gear mechanism 15 are directly connected to each other, and the rotation direction detection circuit 6
9 and the operation control circuit 70 are added.
Since the third embodiment is the same as the first embodiment, detailed description of the same portions will be omitted.

In the second embodiment, since the one-way clutch 14 is not interposed between the pinion 12 and the first gear mechanism 15, the first gear mechanism 15 is With the rotation of, it rotates in the same direction as the rotation direction.

FIG. 6 is a block diagram showing an example of the brake control circuit 65 according to the second embodiment. In FIG. 6, a rotation direction detection circuit 69 detects whether the door 201 rotates in either the opening direction or the closing direction. To detect whether
When the door 201 rotates in the closing direction, a high-level rotation direction signal Ps is output. The rotation direction detection circuit 69 is composed of, for example, a rotary encoder or the like that outputs two pulses having different phases.
1 or the pinion 12 or the like. The invention is not limited to the rotary encoder. For example, a sensor for detecting the moving direction of the rack 13 may be used. In other words, it is only necessary to detect whether the door 201 is moving in the opening direction or the closing direction.

The rotation direction signal Ps of the rotation direction detection circuit 69 is input to an operation control circuit 70 composed of, for example, an AND circuit. This operation control circuit 70
The rotation direction signal Ps from the rotation direction detection circuit 69 and the brake control signal BS from the inverter 68 are input, and when the rotation direction signal Ps is at a high level, that is, when the input shaft 1
The brake control signal BS is output from the field effect transistor 33B of the brake circuit 33 only when the motor 1 is rotating in the closing direction.
To be supplied.

Next, the operation of the second embodiment will be described.

Now, when a person opens the door 201, the input shaft 11 rotates clockwise in FIG. 2 with the rotation of the arm 102, and the rack 13 is urged in a direction to close the door 201.
Further, the rotation of the input shaft 11 causes the pinion 12 to rotate. Then, with the rotation of the pinion 12, the first gear mechanism 1
5 rotates and is transmitted to the rotor 31 via the speed increasing gear mechanism including the first and second gear mechanisms 15 and 16.

As a result, an induced voltage is generated in the stator coil 32b, and this voltage is rectified by the rectifier circuit 51 to rapidly charge the charging capacitor 52.
Is supplied to the rotation control circuit 60 as a DC power supply as an operation power supply, and the components of the rotation control circuit 60 are activated, and a brake control signal BS is generated in the same manner as in the first embodiment.

On the other hand, the rotation direction detection circuit 69 detects, for example, the rotation direction of the input shaft 11, that is, the rotation direction of the door 201. In this case, since the door 201 is open, the rotation direction signal Ps is set to a low level. Output. Therefore, the operation control circuit 70 sends the field effect transistor 33B
Is not supplied with the brake control signal BS, no braking force is generated.

In this state, when a person releases the door 201, the rack 13 is moved by the urging force of the spring 20, and the pinion 12 and the input shaft 11 are rotated, so that the arm 1
02 rotates, and the door 201 is closed.

The rotation of the pinion 12 is increased in speed by the first and second gear mechanisms 15 and 16 and transmitted to the rotor 31, so that an induced voltage is generated in the stator coil 32b and this is a rectifier circuit. The charging capacitor 52 is further rectified at 51 and the charging capacitor 52 is further charged.
Is supplied as operating power.

When the components of the rotation control circuit 60 operate, the oscillation signal oscillated by the crystal oscillator 61 is supplied to the programmable frequency divider 62, and the programmable frequency divider 62 divides the signal into a desired frequency division ratio. The circulated target speed pulse signal Pv is supplied to the down terminal t _D of the up / down counter 64, and the induced voltage of the stator coil 32b of the power governor 30 is supplied to the comparator 63. Is the reference voltage Vre
f, the rotation detection pulse signal Pr which goes to a high level becomes the up terminal t of the up / down counter 64.
Supplied to _U. When the rotor 31 rotates at a high speed, for example, a high voltage and high frequency induced voltage is generated in the stator coil 32b, and the frequency of the rotation detection pulse signal Pr output from the comparator 63 is output from the programmable frequency divider 62. When the state becomes much higher than the speed pulse signal Pv, the count value N of the up / down counter 64 becomes a large positive value, and the brake control signal BS having a large duty ratio is generated.

On the other hand, in the rotation direction detection circuit 69, since the input shaft 11 is rotated in the direction to close the door 201,
The rotation direction signal Ps is output at a high level. Therefore,
Since the operation control circuit 70 supplies the brake control signal BS to the field effect transistor 33B of the brake circuit 33, a large braking force is generated.

When the rotation of the rotor 31 is decelerated, the frequency of the rotation detection pulse signal Pr output from the comparator 63 decreases, so that the count value N of the up / down counter 64 also decreases. As the duty ratio of the control signal BS decreases,
By reducing the section in which the field effect transistor 33B of the brake circuit 33 is turned on, the braking force is reduced, and the speed corresponding to the target speed pulse signal Pv is maintained while maintaining a constant accumulated pulse amount in the up / down counter 64. Is driven at a constant speed.

Since the rotor 31 is driven at a constant speed, the second gear mechanism 16, the first gear mechanism 15, the pinion 1
2. The input shaft 11 is also driven at a constant speed, that is, the door 201 is closed at a constant speed.

Therefore, in the second embodiment, the same operation and effect as those of the first embodiment can be obtained, and in the second embodiment, even when the door 201 is opened. Since the charging capacitor 52 is charged, fluctuations in the power supplied to the rotation control circuit 60 can be suppressed, and more stable power supply can be performed.

In each of the above embodiments, the case where the up / down counter 64 is used as the rotation control circuit 60 has been described. However, the present invention is not limited to this, and as shown in FIG. Circulator 62
The target speed pulse signal Pv output from the comparator 63 and the rotation detection pulse signal Pr output from the comparator 63 are supplied to a phase comparison circuit 71 for phase comparison, and a pulse signal corresponding to the phase difference is supplied to a low-pass filter 72. PLL (Phase)
A brake control signal BS is obtained by providing a phase difference voltage signal output from the PLL circuit to the pulse width modulation circuit of the brake control circuit 73 in which the D / A converter 66 is omitted. Even if it does in this way, the same effect as the above-mentioned embodiment can be obtained.

In each of the above embodiments, the case where the closing speed is set by using the programmable frequency divider 62 has been described. However, the present invention is not limited to this. As shown in FIG. , Programmable frequency divider 62
, A plurality of N frequency dividers 75a, 75b,..., 75N having different frequency division ratios are connected in parallel to the crystal unit 61,
These output pulse signals are supplied to a selector 76 composed of an analog switch or the like, and the frequency dividers 75a, 75b,.
One of the 75N output pulse signals may be selected.

At this time, for example, the degree of opening of the door 201,
For example, the opening angle is determined by providing a sensor
From the position of the selector 76 according to the degree of opening.
In the process of closing the door 201, it is also possible to change the closing speed in a stepwise manner.

In place of the programmable frequency divider 62, as shown in FIG. 9, a reference clock signal generating circuit 78 for oscillating a reference clock pulse having a frequency much lower than the oscillation frequency of the crystal oscillator 61. And a programmable multiplier 79 for multiplying the output pulse of the reference clock signal generation circuit 78 to an arbitrary multiplication ratio selected by the set value of the speed setting switch 79a. Pv may be output.

Also, instead of the programmable frequency divider 62, a constant voltage output from a constant voltage circuit 80 inserted on the output side of the charging capacitor 52 is supplied to a variable resistor 81 as shown in FIG. The voltage output from the slider 81a of the variable resistor 81 may be converted into a pulse signal by the V / F converter 82 to generate the target speed pulse signal Pv.

In place of the programmable frequency divider 62, as shown in FIG. 11, for example, a 1-Hz reference clock signal output from a reference clock generation circuit 83 is input to one input terminal of a phase comparator 84. A 1-Hz frequency-divided pulse signal output from the frequency divider 85 is input to the other input terminal, the phase difference signal output from the phase comparator 84 is integrated by a low-pass filter 86 to be DC, and this DC signal is converted to a DC signal.
The signal is amplified by the C amplifier 87 and supplied to the voltage controlled oscillator 88 to obtain a pulse signal of, for example, 64 Hz. The pulse signal is supplied to the dividing cycle 85 to divide the frequency into half the frequency, and output from the voltage controlled oscillator 88. 64 Hz, 32 Hz, 16 Hz, 8 Hz, 4 Hz, 2H divided by the frequency divider 85
The target speed pulse signal Pv may be formed by selecting a pulse signal of z and 1 Hz by the selector 89.

In each of the above embodiments, the case where the rotation control means is constituted by the programmable frequency divider 62, the comparator 63, the up / down counter 64, and the brake control circuit 65 has been described. Instead, as shown in FIG. 12, the rotation detection pulse signal Pr output from the comparator 63 is supplied to the one-shot circuit 91 to generate a pulse signal having a predetermined width at the rising edge of the rotation detection pulse signal Pr. To
It is supplied to a frequency / voltage (F / V) converter 92 for converting a frequency into a voltage, and a rotation detection voltage Vr output from the frequency / voltage converter 92 and a constant value inserted on the output side of the charging capacitor 52. The speed command voltage Vv output from the slider 93a of the variable resistor 93 to which the constant voltage of the voltage circuit 80 is supplied is supplied to the differential amplifier 94, and the differential amplifier 9
The difference voltage between the two output from the brake control circuit 6
5 may be supplied.

As shown in FIG. 13, a variable resistor 95 to which a constant voltage output from a constant voltage circuit 80 inserted is provided at the output side of the charging capacitor 52 is provided. Is input to the other input side of the comparator 97 in which the triangular wave from the triangular wave generating circuit 96 is inputted to one input side, and the brake control signal directly duty-controlled. BS
May be formed.

Further, in each of the above embodiments, the case where the duty control of the field effect transistor 33B of the brake circuit 33 is performed by the brake control circuit 65 has been described. However, the present invention is not limited to this, and the gate of the field effect transistor 33B is not limited to this. The braking force may be controlled by controlling the voltage applied to the motor.

In each of the above embodiments, the case where the spring 20 is used has been described. However, the present invention is not limited to this, and a spring or the like can be applied. In this case, for example, the input shaft 11 is used. The mainspring should be wound with the rotation of. Furthermore, in each of the above-described embodiments, a case has been described in which the present invention is applied to the door 201 that opens outwardly or inwardly. However, the present invention can be applied to, for example, a sliding door. In this case, for example, the rack 13 and the sliding door are connected, and the spring 2 is opened when the sliding door is opened.
What is necessary is just to make 0 contract.

Here, the spring 20 corresponds to the urging means, the power regulator 30 corresponds to the power regulator, the rotation control circuit 60 corresponds to the rotation control means, and the one-way clutch 14
Corresponds to the clutch means.

[0074]

As described above, according to the first aspect of the present invention, the torque of the input shaft, which rotates in conjunction with the opening and closing of the door, is transmitted to the power generation control means via the train wheel. By generating the induced power, the rotation control means is driven by the generated induced power, and the rotation cycle of the power generation control means when the input shaft is rotated in the direction to close the door, that is, the rotation cycle of the input shaft is set to an arbitrary value. Since the control is performed at the desired speed, the door can be closed at the desired speed without requiring a power supply.

According to the second aspect of the present invention, the clutch means is interposed between the input shaft and the power generation control means, and the input shaft is rotated only when the input shaft is rotated in the direction to close the door. Because the torque was transmitted to the power generation control means,
Induced power is generated only when the door is closed, whereby the rotation control means is activated and the speed of the input shaft can be adjusted.

Further, according to the third aspect of the invention, when the input shaft is rotated in the direction to open the door and when the input shaft is rotated in the direction to close the door, the rotation control means is controlled by the power generated by the power generation control means. Since driving is performed, power supply to the rotation control means can be performed more stably.

[Brief description of the drawings]

FIG. 1 is an example of a door closer to which the present invention is applied.

FIG. 2 is a schematic configuration diagram of a door closer main body according to the first embodiment.

FIG. 3 is a block diagram illustrating an example of a control system of a door closer.

FIG. 4 is a block diagram illustrating an example of a brake control circuit in FIG. 3;

FIG. 5 is a time chart for explaining the operation of the brake control circuit;

FIG. 6 is a block diagram illustrating an example of a brake control circuit according to a second embodiment.

FIG. 7 is a block diagram showing another first embodiment of the rotation control circuit.

FIG. 8 is a block diagram showing another second embodiment of the rotation control circuit.

FIG. 9 is a block diagram showing another third embodiment of the rotation control circuit.

FIG. 10 is a block diagram showing another fourth embodiment of the rotation control circuit.

FIG. 11 is a block diagram showing another fifth embodiment of the rotation control circuit.

FIG. 12 is a block diagram showing another sixth embodiment of the rotation control circuit.

FIG. 13 is a block diagram showing another seventh embodiment of the rotation control circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Input shaft 12 Pinion 13 Rack 14 One-way clutch (clutch means) 15 1st gear mechanism 16 2nd gear mechanism 30 Power generation regulator (power generation control means) 31 Rotor 32 Stator 32b Stator coil 33 Brake circuit 33B Field effect transistor Reference Signs List 50 rotation control device 51 rectifier circuit 52 charging capacitor 53 power supply circuit 60 rotation control circuit (rotation control means) 61 crystal oscillator 62 programmable frequency divider 63 comparator 64 up / down counter 65 brake control circuit 69 rotation direction detection circuit 70 operation Control circuit 71 Phase comparison circuit 72 Low-pass filter 73 Brake control circuit 75a to 75N Frequency divider 76 Selector 78 Reference clock signal generation circuit 79 Programmable multiplier 80 Constant voltage circuit 81 Variable resistor 82 V / F conversion 83 Reference clock generating circuit 84 Phase comparator 85 Divider 86 Low pass filter 87 DC amplifier 88 VCO 89 Selector 91 One shot circuit 92 F / V converter 93 Variable resistor 94 Differential amplifier 95 Variable resistor 96 Triangular wave generating circuit 97 Comparator 100 Door closer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Osamu Shinkawa 3-5-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72) Inventor Hirokazu Seki 3-3-5 Yamato Suwa City, Nagano Prefecture Seiko -F-term in Epson Corporation (reference) 2E050 FA01 GA04 HA04 HB04 KA01

Claims (3)

[Claims] An input shaft that rotates in conjunction with opening and closing of a door, and an urging means that is energized when the input shaft is rotated in a direction to open the door and urges the input shaft in a direction to close the door. A power generation control means connected to the input shaft via a train wheel to generate induced power and have a speed control function; and a direction in which the input shaft is driven by the power generated by the power generation control means and the door closes the door. And a rotation control means for controlling a rotation cycle of the power generation control means to a desired speed when the power generation control means is rotated. 2. A clutch means for selecting transmission and interruption of torque of the input shaft between the input shaft and the power generation control means, wherein the clutch means rotates in a direction in which the input shaft closes a door. 2. The door closer according to claim 1, wherein when the rotation is performed, the torque of the input shaft is transmitted to the power generation speed control means. 3. The rotation control means is driven by the power generated by the power generation control means when the input shaft is rotated in a direction to open the door and when the input shaft is rotated in a direction to close the door. The door closer according to claim 1, wherein: