JP4289310B2 - Automatic door - Google Patents

Description

  The present invention relates to an automatic door.

  An automatic door that opens and closes a door by driving a magnet-movable linear motor and is designed for a house has an upper door connected to a mover of the magnet-movable linear motor disposed on the upper frame. When construction is performed with the upper frame not horizontal and the closed end position or open end position lowered, the linear motor is also tilted in the same way, and the door moves from the closed end position or open end position due to its own weight. There is. When this moving distance is equal to or greater than a predetermined distance, the magnet movable linear motor is activated as if the door was closed or opened, and a so-called assist activation state in which the door automatically opens and closes.

  For this reason, as disclosed in JP-A-2000-130020, when the suction portion is attached to the door and the suction stopper is disposed on the fixed side, the door moves to the open end position or the closed end position. There is one in which a suction portion that contacts the suction stopper is sucked to hold the door at an open end position or a closed end position. Further, as disclosed in Japanese Patent Application Laid-Open No. 2000-204630, a stationary suction part is provided on the frame of the door device, and when the door moves to the open end position or the closed end position, the movable suction part provided on the door is not provided. There is one in which suction is performed by contact to hold the door in an open end position or a closed end position.

However, in any of the above cases, it is necessary to provide a suction part and a suction target part on the door side and the fixed side, respectively, and as the number of parts increases, processing for attachment to the door frame on the fixed side is also required. There is.
Japanese Patent Laid-Open No. 2000-130020 JP 2000-204630 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an automatic door having a simple configuration that can hold the door at an open end position or a closed end position.

The automatic door according to claim 1, which achieves the above object, includes a stator having a plurality of coils arranged in a longitudinal direction of the door above the door, and a relative movement in the longitudinal direction with respect to the stator. An automatic door that freely opens and closes the door by driving a magnet movable linear motor composed of a mover magnet having a plurality of magnets fixed to the upper portion of the door. Of the mover magnets, the magnetic body facing the mover magnet at the end of the opening direction side, and / or the mover magnet at the end of the mover magnet in the closing direction when the door is in the closed position. Is located in a non-contact state with respect to the mover magnet, and the door is held at the open end position and / or the closed end position by an attractive force generated between the magnetic body and the mover magnet. And the magnetic body is In the automatic door positioned in the magnetizing direction of the mover magnet, the magnetic body is a permanent magnet, and the mover magnet at the end of the open direction side when the door is in the open end position or the closed end position The center of magnetization of the permanent magnet, which is the center of the permanent magnet, with respect to the center of magnetization of the permanent magnet, or the center of magnetization of the mover magnet at the end of the closing direction. Is characterized by being shifted to the opening direction side or the closing direction side .

According to a second aspect of the present invention , in the configuration of the first aspect, the movable magnet type linear motor has the movable element magnet and the magnetic body arranged in an outer rail provided above the door. And

According to the automatic door according to claim 1, a stator in which a plurality of coils are arranged in the longitudinal direction of the door above the door, and the door is movable relative to the stator in the longitudinal direction. The door is opened and closed by a magnet movable linear motor composed of a mover magnet having a plurality of magnets fixed on the upper part. When the door is in the open end position and / or the closed end position, the magnetic body made of a permanent magnet faces the mover magnet at the open end side and / or the close end side in the non-contact state. The door is held at the open end position and / or the closed end position by the attractive force generated between the magnetic body and the mover magnet. At this time, when the door is at the open end position or the closed end position, the center of magnetization in the longitudinal direction of the mover magnet at the end in the open direction side or the longitudinal direction of the mover magnet at the end in the close direction Since the center of magnetization of the permanent magnet in the longitudinal direction is shifted from the center of magnetization of the permanent magnet toward the opening direction or the closing direction , the door is opened or closed. Can be reliably and stably held.

According to the automatic door of the second aspect, since the movable magnet type linear motor has the mover magnet and the magnetic body arranged in the outer rail provided above the door, it can be easily attached to the door frame or the like. In both cases, the mover magnet and the magnetic material do not appear in appearance and do not impair the appearance.

  For the purpose of providing an automatic door with a simple configuration that can hold the door in the open end position or the closed end position, by positioning the magnetic body in a non-contact state with respect to the mover magnet of the mover of the magnet movable linear motor It was realized.

Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an automatic door device 1. The door 2 is driven to open and close by a magnet movable linear motor (hereinafter simply referred to as a linear motor) 3. The linear motor 3 includes a stator 4 and a mover 5 that can move relative to the stator 4, and is driven and controlled by a door opening / closing controller 3 a based on a predetermined opening / closing program. The mover 5 is formed to a length that substantially matches the length of the door 2 in the door width direction.

FIG. 2 is a cross-sectional view of a main part on the open end side of the automatic door device 1. The outer rail 6 of the linear motor 3 is an integrally molded product of non-magnetic material such as aluminum. As for the cross-sectional shape, the whole having the upper wall 7 and the opposite side walls 8, 8 following the upper wall 7 is formed in a substantially inverted U-shaped cross section. And the guide rail parts 9 and 9 bent inward are formed in the lower end part of the opposing side walls 8 and 8 of the outer rail 6, respectively.

  The stator 4 is fixed to the upper wall 7 at the center in the longitudinal direction of the outer rail 6 by aligning a plurality of coils (not shown) with iron cores in the longitudinal direction. A mover 5 is inserted in the outer rail 6. The mover 5 is a mover magnet in which a permanent magnet block 12 is inserted into a mover case 11 made of a non-magnetic material such as aluminum. The permanent magnet block 12 has a predetermined length of ferrite pieces 13 arranged on a yoke 14 cut substantially equal to the length in the door width direction of the door 2 without gaps, and the ferrite pieces 13 are separated from the magnetization reference at one end of the yoke 14. It is magnetized by alternately changing the polarity at a predetermined pitch in the thickness direction.

  At both ends of the mover case 11, a moving body 16 including rollers 15 and 15 that run on the guide rail portions 9 and 9 of the outer rail 6 is attached. The movable body 5 is held by the movable body 16 so as to be movable corresponding to the stator 4. A suspension block 17 is attached to the lower surface of the moving body 16. The suspension block 17 is fitted in the upper part of the side surface of the door 2 to suspend the door 2.

A bracket 19 bent in a crank shape is attached to the upper wall 7 at the end of the outer rail 6 in the open end direction by a fixing screw 18 fastened from the outside of the outer rail 6. The fixing screw 18 is screwed into a weld nut 21 attached to the lower surface of the upper horizontal piece 20 of the bracket 19. A permanent magnet 23 is attached to the lower surface of the lower horizontal piece 22 of the bracket 19 and has a length shorter than the magnetization pitch and is magnetized in the thickness direction. The permanent magnet 23 is as close as possible to the upper surface of the mover case 11 at a distance within the magnetic pole pitch from the open end position OP.

Further, as shown in FIG. 2, when the door 2 is at the open end position OP, the magnetization center Cx that is the central portion in the longitudinal direction of the permanent magnet 23 is the ferrite piece 13 a at the extreme end on the open end side of the permanent magnet block 12. Is shifted in the open end direction with respect to the magnetization center Cy which is the center in the longitudinal direction. Thereby, when the door 2 moves to the open end position OP, the door 2 is pressed against the open end position OP by the attractive force acting between the permanent magnet 23 and the ferrite piece 13a.

When the automatic door device 1 drives the linear motor 3 to move the door 2 to the open end position OP, the permanent magnet 23 attached to the bracket 19 and the permanent magnet block 12 inserted into the mover case 11 are moved. The door 2 can be stably and reliably held at the open end position OP by the attractive force acting between the ferrite piece 13a at the end.

The automatic door device 1 according to the above embodiment is in a non-contact state with respect to the permanent magnet block 12 constituting the mover 5 of the linear motor 3 as a stopper for holding the door 2 at the open end position OP or the closed end position CP. The permanent magnet 23 is disposed in the outer rail 6 of the linear motor 3, and the door 2 is moved to the open end position OP by the attractive force between the permanent magnet 23 and the ferrite piece 13a at the outermost end of the permanent magnet block 12. Can hold. Further, it is not necessary to provide a suction part and a suction target part on the fixed side of the door 2 and the door frame, etc., and the number of parts can be reduced.

Further, since the permanent magnet 23 is disposed and fixed in a non-contact manner with respect to the permanent magnet block 12 which is a mover magnet, friction due to both contact is not generated, so that generation of abnormal noise can be prevented and durability can be improved. Can be improved. Then, before the door 2 stops at the open end position OP, the attraction action between the permanent magnet 23 and the permanent magnet block 12 acts as a brake on the door 2, and the impact and contact at the time of contacting the door frame at the open end position OP. Sound generation is reduced.

  Further, by arranging the permanent magnet 23 in the magnetizing direction of the permanent magnet block 12 which is a mover magnet, the permanent magnet 23 can be disposed in the outer rail 6 of the linear motor 3 and is attached to a door frame or the like. It does not need to be performed, and it does not appear on the appearance and impair the appearance.

  And when the door 2 is in the open end position OP, the magnetization center Cx of the permanent magnet 23 is shifted in the open end direction with respect to the magnetization center Cy of the ferrite end 13a at the open end side of the permanent magnet block 12. When the door 2 moves to the open end position OP, the door 2 is pressed against the open end position OP by the attractive force acting between the permanent magnet 23 and the ferrite piece 13a. It can be reliably and stably held at the open end position OP.

The configuration of the permanent magnet 23 and the permanent magnet block 12 corresponding thereto can be provided on the closed end position CP side of the automatic door device 1. Thereby, the door 2 moved to the closed end position CP can be stably and reliably held at the closed end position CP.

Instead of the permanent magnet 23, a magnetic material such as iron may be used. Moreover, the said Example is applicable also to a double door type automatic door apparatus. In addition, the present invention can also be applied to an automatic door of a type in which a magnetic body is embedded in a door frame so as to be attracted to a stator portion located at an end of the vertical frame side when the door is in a fully closed state.

It is the schematic front view which showed the automatic door apparatus. It is sectional drawing of the principal part by the side of the open end of an automatic door apparatus. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic door apparatus 2 Door 3 Linear motor 4 Stator 5 Movable element 6 Outer rail 12 Permanent magnet block 13, 13a Ferrite piece 23 Permanent magnet OP Open end position CP Closed end position Cx, Cy Magnetization center

Claims (2)

A stator having a plurality of coils arranged in the longitudinal direction of the door above the door, and a mover magnet having a plurality of magnets fixed to the upper portion of the door so as to be movable relative to the stator in the longitudinal direction; An automatic door that opens and closes a door by driving a magnet movable linear motor composed of: when the door is in the open end position, among the plurality of mover magnets, The opposing magnetic body and / or the magnetic body facing the mover magnet at the end in the closing direction of the mover magnet when the door is in the closed end position are in a non-contact state with respect to the mover magnet. The door is held at the open end position and / or the closed end position by the attractive force generated between the magnetic body and the mover magnet, and the magnetic body is magnetized in the magnetizing direction of the mover magnet. Automatic door scent that is located in ,
The magnetic body is a permanent magnet, and when the door is in the open end position or the closed end position, the magnetizing center or the closing direction side end that becomes the center in the longitudinal direction of the mover magnet at the end in the opening direction The magnetization center that is the central portion in the longitudinal direction of the permanent magnet is positioned so as to be shifted to the opening direction side or the closing direction side with respect to the magnetization center that is the central portion in the longitudinal direction of the mover magnet. Automatic door featuring. 2. The automatic door according to claim 1 , wherein the movable magnet linear motor has the mover magnet and a magnetic body disposed in an outer rail provided above the door.

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