JPS63233184A - Automatic door apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic door device suitable for use in general buildings such as supermarkets.

``Conventional technology'' Conventionally, automatic door devices installed at the entrances and exits of general buildings such as supermarkets and department stores have been difficult to drive because they can directly extract linear motion and are maintenance-free because they are non-contact. A motor using a linear induction motor (hereinafter simply referred to as LIM) as a power source has been realized.

FIG. 6 shows the drive source 1. FIG. 2 is a diagram showing an example of the conventional automatic door device using IM. In FIG. 6, reference numeral 1 is a door, and this door is of type 1.
．． ．． ．． A rod 5 is fixed horizontally along the wall surface of the -1 side wall 4 of the entry/exit (-13), which is configured to be automatically opened and closed by the I M 2. 5 is fitted with a traveling magnetic field generating device 6 fixed to the negative part of the door 1. Here, the rod 5
becomes the secondary conductor of the rod-shaped L I M 2, and the traveling magnetic field generator 6 becomes the primary side of the rod-shaped L I M 2.

Both ends of the traveling magnetic field generator 6? A sliding bearing 7.7 is provided, whereby the traveling magnetic field generating device 6 is supported so as to be able to move smoothly in the longitudinal direction of the rod 5 with the door 1 suspended from the lower part thereof. When a current is supplied through the traveling magnetic field generator 6ζ two-curl cord 8, a traveling magnetic field is generated between the traveling magnetic field generator 6 and the rod 5, and an eddy current flows to generate this traveling magnetic field. The device 6 moves along the rod 5, and the door I is opened and closed.

[Problems that the Invention Cannot Solve] However, the conventional automatic door device using the LIM as a drive source has the following problems.

■ Since the thrust generation source of L[M is based on induction, the efficiency of thrust generation is not good. Since this requires a mason-sized LIM that is larger than the size of the door 1 to be opened and closed, and large-scale power equipment to drive it, it cannot fit inside the door compartment of a normal building such as the aforementioned supermarket. difficult to apply.

(2) As mentioned above, since the thrust value of L I M is small, the opening/closing operation of the door 1 is performed with a force that is barely enough to move the door 1. Therefore, it is very vulnerable to external disturbances such as wind passing through the entrance/exit 3, collision with obstacles such as pebbles, or contact with a human body, and easily causes the unclosed phenomenon described in A1.

■ Voltage control using a Zyristor or frequency control using an inverter is usually used to control l, IM<III, but are these control methods? As a result, harmonics are mixed into the drive current waveform, and this high 1JAI wave ζ5 causes vibration between the traveling magnetic field generator 5sl 6 and the rod 57, which causes noise every time the door 1 is turned off. or occur.

■ Since the thrust generated by L and I M is small ν], it is possible to reduce the frequency of use (percentage 1 - FD) and increase the thrust to drive the door, but in the case of a door where many people enter and exit, a linear motor or heat It exceeds the allowable limit and becomes unable to open or close.

This invention was made in view of the above-mentioned problems, and it improves the efficiency of generating thrust of the motor to reduce the impact of external disturbances.
By using a small machine size and a low-power motor, the purpose is to easily apply it to general buildings such as supermarkets, and to provide an automatic door device that produces low noise when opening and closing the door.

"Means for Solving the Problems" In order to solve the problems of the old model, the present invention provides an automatic door device having a door that is reciprocally supported by a guide member and automatically opened and closed by a linear motor. A secondary side of a linear motor in the form of a long plate extending along the opening/closing direction of the door, and a motor that faces both surfaces of the secondary side with a gap in between and moves along the longitudinal direction of the secondary side. A pair of linear motors each generating a magnetic field is provided with a primary side, and the secondary side is provided with a plurality of plate-shaped permanent magnets arranged on both sides of a long plate-shaped magnetic plate in the longitudinal direction. -4 = Characterized by the fact that it has been accomplished.

Here, among the plurality of plate-shaped permanent magnets provided on the secondary side of the linear motor, those adjacent to each other on the same surface of the magnetic plate (Jl) have their NS poles in opposite directions. It is preferable that the magnetic plates are arranged such that their NS poles are in the same direction.

"Function" In this invention, a long plate-shaped secondary side extending along the opening/closing direction of the door, facing both sides of the secondary side with a gap in between, and extending along the longitudinal direction of the secondary side. The door is opened and closed by a linear motor consisting of a pair of primary sides each generating a moving traveling magnetic field, and the secondary sides are attached to both sides of a long plate-shaped magnetic plate, and a plurality of plate-shaped permanent Since the configuration is such that magnets are arranged individually, the linear motor can be used as a linear branless DC motor by sequentially energizing the secondary side with direct current while detecting the position of the permanent magnet on the secondary side. If polyphase alternating current with different phases is supplied to ,
It can be used as a linear synchronous motor that moves at a speed commensurate with the frequency of polyphase alternating current.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are diagrams showing an automatic door device that is an embodiment of the present invention. In the figure, numeral 10 is super;
This is an entrance/exit of a department store, etc., and on the upper wall 11 of this entrance/exit 10, a 1-knoll I2 with a hook-shaped cross section is provided which extends horizontally along the wall surface. Reference numeral I3 designates a door, and two door wheels 15 are rotatably supported on a portion of this door I3 via a hanging member 14. These door rollers 15 are placed so as to engage with one surface of the rail 12, so that the door 13 is suspended so as to be able to reciprocate in the longitudinal direction of the rail 12.

A secondary side member 17 extending in the longitudinal direction of the rail 12 is attached to the second part of the hanging member +44 attached to the upper part of the door 13, with a secondary side member 17 biased toward one end, and a secondary side member 17 extending in the longitudinal direction of the rail 12 is attached to the side wall portion 11 of the entrance/exit lO. A pair of primary side members 18 and 19 that face both surfaces of the secondary side member 17 with an air gap in between and generate a traveling magnetic field that moves in the longitudinal direction of the secondary side member 17 are covered with a U-shaped cross section. It is housed and attached within 30.

That is, these secondary side member I7 and − secondary side member 18,
I9 constitutes a linear motor 16 that opens and closes the door 13 along the longitudinal direction of the rail 12.

To explain the configuration of this linear motor I6 in more detail, the primary side member 18 (or
9), as shown in FIG. 3, the tooth 20a and the groove 201
) A primary core 2I formed by laminating a plurality of electric iron plates 20 with a hole punched therein, and coils 22u and 22v wound into each of the grooves 20b.

22w. On the other hand, as shown in FIGS. 3 and 4, the secondary side member 17 includes a plurality of permanent magnets arranged along the longitudinal direction on both sides of a long plate-shaped magnetic plate 23 with an inverted T-shaped cross section. 24 are arranged. In this case, the arrangement interval of each permanent magnet 24 is as follows:
It is made equal to the ball bi-soji τ of I9.

Also, among the permanent magnets 24, those that are adjacent to each other on the same surface of the magnetic plate 23 are arranged so that their north and south pole directions are opposite to each other, and are opposed to each other with the magnetic plate 23 in between. Those that do so are arranged so that their NS poles are in the same direction. As a result, the magnetic flux generated by each permanent magnet 24 passes through the magnetic plate 23 in its thickness direction, as shown by the broken line in FIG.

That is, the magnetic flux emitted from the N pole of the permanent magnet 24 disposed on one surface 23a of the magnetic plate 23 passes through the core 21 of the negative side member I8 and enters the S pole of another permanent magnet 24. The magnetic flux emitted from the N pole of the permanent magnet 24 passes through the magnetic plate 23 and enters the S pole of the permanent magnet 24 disposed on the other surface 23b of the magnetic plate 23 opposite thereto. Similarly, the magnetic flux emitted from the N pole of the permanent magnet 24 placed on the other side of the magnetic plate 23b passes through the core 21 of the primary side part 19 and reaches the S pole of another permanent magnet 24. Enter, this permanent magnet 24
The magnetic flux emitted from the N pole passes through the magnetic plate 23 and enters the S pole of the original permanent magnet 24 placed on one surface 23a of the magnetic plate.

Furthermore, a permanent magnet 2 is attached to one side 23a of the magnetic plate 23.
A permanent magnet 25 for position detection is arranged above the four arrangement locations along the longitudinal direction of the magnetic plate 23. The arrangement interval of these permanent magnets 25 is set to be a suitable interval for position detection, such as every 1 mm, for example. Adjacent permanent magnets 25 are arranged so that the directions of their NS poles are opposite to each other. And, the primary side member 18.1 of the linear motor I6
In the cover 30 that accommodates the permanent magnet 9, there is a magnetic pole direction of the permanent magnet 25, that is, a direction between the permanent magnet 24 of the secondary side member 17 and the primary side member 18, I9, at a position opposite to the old type position detection permanent magnet 25. A magnetic field detection element 26 such as a Hall element is provided to detect relative positional relationship.

Reference numeral 27 denotes a control device for the automatic door device, and a relative positional relationship detection signal B between the secondary side member 18, 19 and the permanent magnet 24 of the secondary side member 7 is supplied from the magnetic field detection element 26. The door 13 is opened and closed by controlling the current supplied to the coils 22u122v and 22w according to the opening signal S supplied from a mud switch, an optical switch, an ultrasonic switch (not shown), etc.

In the automatic door device having the above configuration, in order to open and close the door I3, the permanent magnet 24 of the secondary side member 17 and the primary side shrine 18, 19 are connected by the magnetic field detection element 26.
Based on this, the relative positional relationship between coil 2 and
By sequentially exciting 2u, 22v, and 22w,
The door 13 can be opened and closed by moving the secondary side member 17 in the direction of arrow A or B in FIG. 3. At this time, since the relative positional relationship between the permanent magnet 24 of the secondary side member 17 and the primary side members 18 and I9 is constantly detected by the magnetic field detection element 26, the output from this magnetic field detection element 26 is sent back as a command. By taking the difference between the two and adjusting the amount of power supplied to the coils 22u, 22v, and 22w based on the deviation signal, the door 13 can be stopped at a specified position or opened/closed from any position. Alternatively, the moving speed of the door 13 can be feedback-controlled. That is, the linear motor 16 is used as a linear branless DC motor.

Therefore, according to this embodiment, the opening/closing operation of the door 13 is performed by the linear motor 16, which is a linear brush 1/s DC motor, so that the opening/closing operation of the door 13 is performed by the linear motor 16, which is a linear brush DC motor. As a result, the efficiency of thrust generation is nearly doubled. Therefore, the door I3 can be reliably opened and closed without being affected by the above-mentioned disturbances such as wind, and the motor size of the linear motor 16 attached to the automatic door device and the drive speed thereof can be adjusted. Since the power equipment only needs to be small-scale, it can be easily applied to general buildings such as supermarkets.Furthermore, by using the linear motor I6 as a linear branless DC motor, it becomes easy to control and , the possibility of noise generation during door opening/closing operations is almost eliminated.

Next, FIG. 5 is a diagram showing the secondary side member 17 of the linear motor 16 of a self-moving door apparatus according to another embodiment of the present invention. Note that the only difference between the automatic door device of this embodiment and the automatic door device of the previous embodiment is the structure of the linear motor j6. Therefore, the same reference numerals are used for the same components as in the previous embodiment. The illustrations and explanations will be omitted.

The secondary side member 17 of the linear motor 16 of this embodiment includes:
Unlike the secondary side member of the previous embodiment, there is no permanent magnet 25 for position detection. Similarly, there is no magnetic field detection element 26 for detecting the magnetic pole direction of the permanent magnet 23 inside the cover 30 that houses the primary side members 18 and I9 of the linear motor I6.

In order to open and close the door 13 in an automatic door device having such a configuration, the primary side shafts 18 and 19 of the linear motor 16 are required to open and close the door 13.
By supplying polyphase alternating current with suitably different phases to the coils 22u, 22v, and 22w, the -next side member 18
, I9 to generate a traveling magnetic field that moves in one direction, and thereby move the secondary side member 17 in synchronization with the moving speed of the traveling magnetic field, using the same operating principle as a permanent magnet type synchronous motor, to move the door 13. All you have to do is open and close it. That is,
The linear motor 16 is used as a linear synchronous motor.

Therefore, according to this embodiment as well, the above-mentioned linear motor 1
6 as a linear brushless DC motor can be obtained. Furthermore, since the linear motor 16 is used as a linear synchronous motor, variable speed control is possible by changing the synchronous frequency of the power supplied to the coils 22u, 22v, and 22w.

In particular, in this embodiment, as described above, the permanent magnet 2
Since the structure is such that the magnetic flux emitted from 4 passes through the magnetic plate 23 in the thickness direction, the thickness of the magnetic plate 23 can be made smaller compared to conventional permanent magnet type linear synchronous motors. Therefore, the entire linear motor 16 can be made thinner. In other words, in the conventional permanent magnet type linear synchronous motor, the permanent magnets facing each other with the magnetic plate in between are
They are arranged so that their NS poles are in opposite directions. Therefore, the magnetic flux generated by each permanent magnet flows through the magnetic plate in its longitudinal direction, so if the thickness of this magnetic plate is made too small, magnetic flux saturation will occur within the magnetic plate, and as a result, The problem was that the thrust generation efficiency of the motor itself was poor because the magnetic flux generated by the permanent magnets could not be used effectively. However, in this embodiment, as described above, the magnetic flux generated by the permanent magnet 24 passes through the magnetic plate 23 in the thickness direction, so the thickness of the magnetic plate 23 is made smaller than in the conventional case. Therefore, the overall thickness of the linear motor 16 can be reduced.

Note that the automatic door device of the present invention is not limited to the shape, dimensions, etc. of the embodiment described above, and various modifications are possible.

``Effects of the Invention'' As described in detail below, according to the present invention, a long plate-shaped secondary side extending along the opening/closing direction of the door, and a gap between both sides of the secondary side are formed. A pair of -.
The door is opened and closed by a linear motor consisting of a
Since the secondary side has a configuration in which a plurality of plate-shaped permanent magnets are arranged on both sides of a long plate-shaped magnetic plate in the longitudinal direction, the position of the permanent magnets on the secondary side is detected. −
If the next side is sequentially excited with direct current, the linear motor can be used as a linear brushless DC motor, or if a polyphase alternating current is supplied to the -next side, it can be used as a linear synchronous motor. Therefore, whether a linear motor is used as a linear branless DC motor or a linear synchronous motor, the thrust generation efficiency is improved compared to automatic door devices using conventional linear induction motors as the drive source. As a result, the door can be opened and closed reliably without being affected by disturbances such as wind, and the motor size of the linear motor attached to the automatic door device and the power equipment to drive it can be small. Therefore, it can be easily applied to general buildings such as supermarkets, and has the excellent effect of reducing the noise caused by the door opening and closing operation.

[Brief explanation of drawings]

115= Figures 1 to 4 are diagrams showing an automatic door device that is an embodiment of the present invention, in which Figure 1 is a front view thereof, and Figure 2 is a line taken along ■-■' line in Figure 1. 3 is a sectional view taken along the arrow 2.
Fig. 4 is a perspective view showing only the secondary side of the linear motor, and Fig. 5 is a sectional view taken along the line l1l-In' in the figure, and Fig. 5 is an automatic door device according to another embodiment of the present invention. Perspective view showing only the secondary side of the linear motor, No. 6
The figure is a front view showing a conventional automatic door device. I2...Rail (guide member), 13...
・Door, I6...Linear motor, 17...
- Secondary side member (secondary side), 18.19...-Next side member (-Next side), 22... Magnetic plate, 23... Permanent magnet.

Claims (2)

[Claims] (1) In an automatic door device having a door that is reciprocally supported by a guide member and automatically opened and closed by a linear motor, the door is equipped with a long plate-shaped linear motor that extends along the opening and closing direction of the door. and the primary sides of a pair of linear motors that face each other with an air gap between both surfaces of the secondary side and each generate a traveling magnetic field that moves along the longitudinal direction of the secondary side. An automatic door device characterized in that the secondary side is constructed by arranging a plurality of plate-shaped permanent magnets in the longitudinal direction on both sides of a long plate-shaped magnetic plate. (2) Among the plurality of plate-shaped permanent magnets provided on the secondary side of the linear motor, those that are adjacent to each other on the same surface of the magnetic plate have their NS poles in opposite directions. Claim 1, characterized in that the elements facing each other with the magnetic plate in between are arranged so that their NS poles are in the same direction. Automatic door device as described in section.