JPH07160985A - Stop gate - Google Patents

Abstract

PURPOSE:To prevent occurrence of a noise sound or hounting when the turning of a door is stopped by smoothing the operation of the door of the bidirectional open/close type stop gate. CONSTITUTION:One end of a door 3 is fixed to a rotary shaft 4 and a stepping motor 5 is connected to a lower end of the rotating shaft 4 and a pattern plate disk 6 is fixed to an upper end face of the rotating shaft 4 coaxially with the rotating shaft 4. The pattern plate 6 is made of a transparent material and a control signal required to open/close the door 3 is provided on the surface along the circumferential direction as a pattern. The control signal is extracted as a change in the transmittance of light through the pattern plate 6 by using an optical sensing means, and converted into an electric resistance value and applied to the stepping motor 5 as a pulse signal having a specific pulse rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop gate that manages the passage of persons who are trying to pass by, such as an automatic ticket gate, while checking the passage of each person.
The present invention relates to a two-way open / close type control gate that manages bidirectional traffic with a pair of doors.

[0002]

2. Description of the Related Art Conventionally, automatic doors and electric locks have been adopted as devices for automatically controlling the passage of people, but in particular, for example, automatic ticket gates, the door portion is made smaller,
Moreover, by combining with a ticket gate or the like, a device for checking the passability of a person who is trying to pass through and managing the passage is called a "stop gate" in order to distinguish it from general automatic doors.

As shown in FIG. 6, for example, this stop gate is provided with a passage P of a pair of frames 1 facing each other through a passage P.
1 side opening / closing type doors 2a and 2b along the passage P.
One is provided in series, and the other is provided with a pair of bidirectional opening / closing doors 3 as shown in FIG. 7, for example. All of these doors 2a, 2b, 3 are fixed to a rotary shaft 4 which is rotatably supported in the frame 1.

In the case of the stop gate shown in FIG. 6, arrow A in the figure
For the passage of a person from the direction, the door indicated by reference numeral 2a is rotated by 90 ° in the direction of the arrow x around the rotation shaft 4 from the stop position, and the passage of the person from the direction of the arrow B in the drawing is performed. On the other hand, the door indicated by the reference numeral 2b is rotated by 90 ° in the arrow y direction about the rotation axis 4 from the stop position.

On the other hand, in the case of the stop gate shown in FIG. 7, for the passage of a person from the direction of the arrow A in the figure, the door 3 is rotated from the stop position by 90 ° in the direction of the arrow x about the rotary shaft 4, respectively.
This is handled by rotating the door 3 and the passage of a person from the direction of the arrow B in the drawing is handled by rotating the door 3 from the stop position about the rotation axis 4 by 90 ° in the direction of the arrow y. From the viewpoint of manufacturing cost, it is desirable that the number of doors is small because the number of doors is low. Therefore, recently, a stop gate provided with a bidirectional opening / closing type door 3 is becoming the main development.

[0006]

Due to the nature of the blocking gates, which manages the passage of passengers by checking whether each person is passing by one by one, when the doors 2a, 2b, 3 are opened and closed, It is necessary to rotate 2b and 3 by 90 ° about the rotary shaft 4 in a short time of about 0.5 to 1 second. However, when the doors 2a, 2b, 3 are rotated at this speed, there is a problem that a large noise is likely to be generated especially when the rotation of the doors 2a, 2b, 3 is stopped. Furthermore, door 2
When a, 2b, and 3 are rotated in a short time of about 0.5 to 1 second, when the doors 2a, 2b, and 3 are closed, there is a problem that hunting occurs due to the inertial force of the doors 2a, 2b, and 3. Was there.

Moreover, particularly when a toothed belt or gear is used for power transmission to the rotary shaft 4, hunting occurs due to backlash between the toothed belt or gear, or doors 2a, 2b, Left and right doors 2a when 3 is closed,
There were inconveniences such as 2b and 3 being inconsistent and unsightly. In addition, in the case of a stop gate equipped with a bidirectional door 3,
Since the opening / closing mechanism of is complicated, it is more difficult to solve the above problem.

The present invention has been made in view of the above circumstances. An object of the present invention is to prevent a door 3 from operating smoothly in a stop gate provided with a two-way opening / closing type door 3, especially when the rotation of the door 3 is stopped. It is to provide a stop gate that is less prone to noise and hunting.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and a pair of rotating shafts respectively provided upright on both sides of a passage, and fixed to these rotating shafts so as to sandwich the passage. In a stop gate having a pair of doors facing each other and a drive source for rotating the pair of doors around the rotation axis to open and close the passage, in particular, the rotation speed of the door is set to start opening and closing of the door. Accordingly, output adjusting means for adjusting the output of the drive source is provided so as to gradually accelerate and gradually reduce toward the end of opening and closing of the door.

[0010]

In the restraining gate of the present invention, the output of the drive source is adjusted by the action of the output adjusting means so that the rotational speed of the door is gradually accelerated with the start of opening and closing, and is gradually reduced toward the end of opening and closing. . Therefore, the door operates smoothly, and noise and hunting are less likely to occur when the rotation is stopped.

[0011]

Embodiments of the present invention will now be described in more detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which the door 3 and its drive mechanism are particularly extracted from the two-way open / close type stop gate as shown in FIG.

The door 3 has a rectangular plate shape, and one end thereof is fixed to the rotary shaft 4. In addition, at the lower end of the rotary shaft 4,
A stepping motor (pulse motor) 5 as a drive source is connected, and a disc-shaped pattern plate 6 is fixed to the upper end surface of the rotary shaft 4 so as to be coaxial with the rotary shaft 4.
The pattern plate 6 is made of a transparent material, and a control signal required for opening and closing the door 3 is processed on the surface as a pattern along the circumferential direction. Then, the control signal can be extracted as a change in the transmittance of the light that has passed through the pattern plate 6 by using a detecting unit described later.

An example of a pattern processed on the pattern plate 6 is shown in FIG. In the case of FIG. 2, the pattern plate 6 is provided with three tracks A, B, and C (reference numerals Ta, Tb, and Tc in the figure) in which patterns are processed along the circumferential direction from the outer peripheral side. They are provided in the order of C. Of these, a pattern for changing the pulse rate (the number of pulses per unit time) applied to the stepping motor 5 along with the rotation of the door 3 is processed on the A track Ta. This pattern is such that the light transmittance is set low as the rotation angle of the door 3 approaches 0 °, 90 ° (stop position), and 180 °, and the areas around 45 ° and 135 ° are made transparent.

On the other hand, the B track Tb is for detecting the position of the door 3, and the door 3 has a rotation angle of 0 ° to 90 °.
In order to distinguish between the range of 90 ° and the range of 90 ° to 180 °, the light transmittance in the range of 0 ° to 90 ° is set to 0, and the range of 90 ° to 180 ° is set to be transparent. It is a thing. The C track Tc is for detecting the stop position of the door 3 (the position where the rotation angle of the door 3 is 0 °, 90 °, 180 °), and the rotation angles 0 °, 90 °, 1
Only the portion corresponding to 80 ° is transparent, and the light transmittance is 0 at other portions.

These rotary shaft 4, stepping motor 5,
The pattern board 6 and the pattern board 6 are both housed in a frame similar to that shown by reference numeral 1 in FIG. 7, and a detection circuit as shown in FIG. 3 is further installed in this frame. This detection circuit includes a light source 7 fixed in the frame so as to illuminate a portion corresponding to a rotation angle of 90 ° of the pattern plate 6 when the position of the door 3 is set to a stop position, and a light source 7 via the pattern plate 6. An optical amplifying element 8 which is fixed at a position opposed to and which converts the amount of light passing through the pattern plate 6 into an electric resistance value,
It is roughly configured from a pulse oscillator (pulse rate setting means) 9 for converting the output value of the optical amplification element 8 into a pulse signal for applying the stepping motor 5 at a pulse rate according to its electric resistance value, and a pattern board 6 and The output adjusting means 10 is formed from this detection circuit.

Next, the control of the rotation speed of the stepping motor 5 by the output adjusting means 10 will be described below.

Normally, the door 3 is stationary at the stop position, but in this state, the rotation angle of the door 3 is 90 °, and the light source 7 illuminates a portion corresponding to the rotation angle of 90 ° of the pattern plate 6. Therefore, the output circuit of the pulse signal to the stepping motor 5 is cut off by the signal from the C track Tc.
When opening the door 3, first give a signal from the outside and press C
The blocking by the truck Tc is released, and the direction of rotation of the door 3 (0 ° side or 180
° side).

When the interruption by the C track Tc is released, a pulse signal is output from the output adjusting means 10 and the door 3
Starts rotating in the direction designated in advance. As the door 3 rotates, the pattern plate 6 starts rotating with respect to the light source 7 and the light amplifying element 8, and as a result, the amount of light (light transmittance) passing between the light source 7 and the light amplifying element 8 is A track. It changes according to the pattern of Ta.

In the case of the present embodiment, a phototransistor is used as the light amplification element 8. Therefore, if a CR oscillator is configured with a phototransistor, a combined resistance of a resistor (reference symbol R in the figure) connected to the emitter of the phototransistor, and a condenser (capacitor, reference symbol C in the figure), discharge occurs when the resistance value increases. The interval can be set longer and the pulse rate can be set smaller. That is, in this embodiment,
As the light transmittance decreases, the collector-emitter current of the phototransistor decreases, the resistance value increases, and the pulse rate decreases. Also, as the light transmittance increases, the collector-emitter current of the phototransistor increases,
The resistance value decreases and the pulse rate increases.

As described above, since the pulse rate applied to the stepping motor 5 changes according to the light transmittance, and the rotation speed of the stepping motor 5 is proportional to the pulse rate, the door 3 changes in light transmittance. Rotate at a speed that suits you.
For example, if the door 3 is rotated from 90 ° to 0 °, 90
In the vicinity of °, the pulse rate is low because the light transmittance is low, but as the angle approaches 45 °, the light transmittance gradually increases and the pulse rate also increases. Therefore, although the rotation speed of the door 3 is slow in the vicinity of 90 °, it gradually increases thereafter.

Further, when the rotation angle of the door 3 approaches 0 °, the transmittance of light gradually decreases, the pulse rate also decreases, and the rotation speed of the door 3 gradually decreases. And the light source 7
However, when the portion corresponding to the rotation angle of 0 ° of the C track Tc is irradiated, the output circuit of the pulse signal to the stepping motor 5 is cut off by the signal from the C track Tc, and as a result, the door 3 stops rotating.

That is, in the case of the stop gate of the present invention, the rotation speed of the door 3 is gradually accelerated as the opening / closing of the door 3 is started, and is gradually reduced toward the end of the opening / closing, as illustrated in FIG. Therefore, the operation of the door 3 is smooth, and noise and hunting during rotation stop are less likely to occur.

Further, in the stop gate of the present invention, the stepping motor 5 is used as a drive source. However, in the stepping motor 5, since the torque becomes smaller as the rotation speed of the door 3 becomes faster, one person operates. It is safe even if it is caught in the inner door 3. Moreover, there is an advantage that the motor is not burned by an overcurrent even when a person is caught in the door 3 in operation or the output adjusting means 10 fails.

In the case of the stop gate of the present invention, since the speed of the door 3 is slow near the stop position, so-called overshoot in which the door 3 exceeds the stop position does not normally occur, but as shown in FIG. If the B track Tb is inverted every 90 °, even if an overshoot should occur, the overshoot is detected by the change in the signal on the B track Tb. Therefore, the overshoot can be corrected by rotating the door 3 in the reverse direction according to the change in the signal on the B track Tb.

The pulse rate for rotating the door 3 is 800 at the maximum speed in the case of a 4-phase stepping motor.
~ 1500pps (pulse / second), minimum speed is 50 ~ 10
The optimum value is about 0 pps, but in practice, the phase of the stepping motor 5 used, the rotation angle per step,
Alternatively, the characteristics such as step out should be examined and the optimum value shall be adopted.

In the above embodiment, the relationship between the pulse rate applied to the stepping motor 5 and the rotation angle of the door 3 is processed as a pattern on the pattern plate 6, the pattern is optically detected, and the electrical resistance is further detected. The pulse rate of the pulse signal converted into a value and transmitted from the pulse oscillator 9 is determined.
On the other hand, it is also possible to read the pattern on the pattern plate 6 as a digital signal and apply a pulse signal having a pulse rate determined in advance based on the read signal to the stepping motor 5. An example using this method will be described below.

FIG. 5 shows digitally the information (relationship between the pulse rate applied to the stepping motor 5 and the rotation angle of the door 3) written in the A track Ta among the patterns processed on the pattern plate 6. It is converted into a form that can be read as a signal. In the case of FIG. 5, the A track Ta is subdivided along the circumferential direction and divided into four columns along the radial direction. As a result, the A track Ta contains the above information of 4 bits (in the radial direction). It is written as a bit signal. Further, each of these four-divided columns represents the lower bit to the higher bit in order from the radially inner side in the order indicated by the symbols a, b, c, d in the drawing.

On the other hand, in the frame of the stop gate, the door 3
When the position of is the stop position, the rotation angle of the pattern plate 6 is 90 °
The light source is fixed so as to irradiate a portion corresponding to (1), and an optical sensor that detects the presence or absence of light that has passed through the pattern plate 6 is provided at a position facing the light source through the pattern plate 6 (both not shown). Is fixed. Then, using this optical sensor, the presence or absence of transmitted light in each column of the A track Ta is read as a digital signal, and a specific code signal is output from the result, and based on the output code signal, the code signal is output according to the code signal. By applying a pulse signal to the stepping motor 5 at a pulse rate determined in advance, the rotation speed of the stepping motor 5 is controlled.

In the case of this embodiment, the A track T shown in FIG.
Table 1 shows the relationship between the digital signal obtained from each column of a, the code signal output as a result, and the pulse rate determined in accordance with the signal.

[0030]

[Table 1] (Note) PR: Indicates the pulse rate.

In the case of this embodiment, the pulse rate is A
There is a concern that the rotation of the door 3 will also be stepwise because it changes stepwise according to the signal subdivided along the circumferential direction of the track Ta, but if the division amount is as shown in FIG. Due to the inertial force of 3, the rotation of the door 3 should not be stepwise.

As a result, also in this embodiment, as illustrated in FIG. 4, the rotation speed of the door 3 is gradually accelerated with the start of opening and closing, and is gradually decelerated toward the end of opening and closing. Therefore,
The door 3 operates smoothly, and noise and hunting are less likely to occur when rotation of the door 3 is stopped.

Further, instead of the pattern plate 6, a rotary encoder may be fixed as the output adjusting means 10 on the upper end surface of the rotary shaft 4. In this case, after the relationship between the pulse rate and the rotation angle of the door 3 is set in advance in the memory of the arithmetic processing unit, the pulses generated by the rotation of the door 3 are counted and the rotation angle of the door 3 is calculated. The pulse rate is further calculated from the calculation result. Then, a pulse signal is applied to the stepping motor 5 at the calculated pulse rate to control the number of revolutions thereof.

Furthermore, the pattern plate 6 is provided on the upper end surface of the rotary shaft 4.
Instead of a variable resistor, a variable resistor is fixed as the output adjusting means 10 and the stepping motor 5
You may change the pulse rate of the pulse signal applied to.

[0035]

As described above, in the stop gate of the present invention, the rotational speed of the door is controlled so as to gradually accelerate as the opening and closing of the door and gradually decelerate toward the end of the opening and closing. Therefore, the door can operate smoothly, and noise and hunting are less likely to occur when the rotation is stopped.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of the structure of a door and its drive mechanism of a two-way open / close type stop gate according to the present invention.

FIG. 2 is a diagram showing an example of a pattern processed into a pattern plate of the stop gate according to the present invention.

FIG. 3 is a diagram showing an example of the structure of the output adjusting means of the stop gate according to the present invention.

FIG. 4 is a diagram showing the relationship between the rotation speed of the door and the rotation angle of the door in the stop gate of the present invention.

FIG. 5 is a diagram showing an example of a pattern processed into a pattern plate of the stop gate according to the present invention.

FIG. 6 is a view showing a general structure of a stop gate having a one-way opening / closing type door.

FIG. 7 is a diagram showing a general structure of a stop gate having a bidirectional door.

[Explanation of symbols]

 1 Frame 2a, 2b, 3 Door 4 Rotation axis 5 Stepping motor 6 Pattern plate 7 Light source 8 Optical amplification element 9 Pulse oscillator 10 Output adjusting means C Condenser R Resistor P Passage

Claims (4)

[Claims] 1. A pair of rotating shafts respectively provided upright on both sides of the passage, a pair of doors fixed to the rotating shafts and facing each other with the passage interposed therebetween, and the pair of doors respectively around the rotating shaft. In a stop gate having a drive source that rotates and opens and closes the passage, the rotation speed of the door gradually accelerates with the start of opening and closing the door, and the drive source is gradually decelerated toward the end of opening and closing the door. A stop gate having an output adjusting means for adjusting the output. 2. The driving source is a stepping motor, and the output adjusting means has a pulse rate setting means for setting the number of pulses (pulse rate) per unit time of a pulse signal applied to the stepping motor. The stop gate according to claim 1, which is characterized in that. 3. The pulse rate setting means is fixed to the upper end surface of the rotary shaft, and has a pattern plate in which the relationship between the pulse rate applied to the stepping motor and the rotation angle of the door is processed as a pattern. 3. The stop gate according to claim 2, wherein the pattern is optically detected and converted into an electric resistance value to set the pulse rate of the pulse signal. 4. The pulse rate setting means is fixed to the upper end surface of the rotary shaft, and has a pattern plate in which the relationship between the pulse rate applied to the stepping motor and the rotation angle of the door is processed as a pattern. 3. The stop gate according to claim 2, wherein the pattern is read as a digital signal, and a pulse signal having a preset pulse rate is generated based on the read signal based on the read signal.