JP2014169536A - Automatic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic door which can smoothly and lightly open and close a door in a small moving region by a relatively simple structure, and is easy in the installation of a sensor for detecting the approach of a passenger without causing erroneous detection.SOLUTION: A pair of vertical bending/stretching link mechanisms 6 which are retractable in the lateral direction are attached to a box body which is arranged at a passage side. Each bending/stretching link mechanism 6 has a base end arm 7, and a tip arm 8 connected to the free end of the base end arm 7 so as to be bendable and stretchable, and a door 4 is connected to a tip of the tip arm 8. The vertical bending/stretching link mechanisms 6 are set in conflicting bending/stretching postures. The base end arm 7 is motion-connected to a drive member 2 so that the base end arm 7 oscillates and operates in a conflicting direction by the rotation of the drive member 12. Furthermore, there is arranged an arm linkage mechanism which oscillates the tip arm 8 in a direction reverse to a base end arm oscillation direction with respect to the base end arm 7 in conjunction with the oscillation of the base end arm 7.

Description

  The present invention relates to an automatic door used for a security gate or the like.

  As an automatic door, as shown, for example, in Patent Document 1, an automatic door that is configured to rotate around a vertical axis and move back and forth in the passage direction has been proposed.

International Publication No. 2007/013255

  The automatic door having the above-described configuration operates the door so that it turns around behind a passerby (passing object) moving forward by rotating a single circular gear and moving the door back and forth. Only one passer-by can pass. However, in order to operate the door smoothly, it is necessary to drive the gear with high accuracy, which requires troublesome maintenance.

  In addition, since the door moves in a complicated and large area, when the door is opened and closed by optically detecting the approach to the door, the operating door enters the detection area and causes false detection. There was a risk of contributing.

  The present invention has been made in view of such circumstances, and has a relatively simple structure, and can smoothly open and close the door in a small moving region, and can detect the approach of a passerby or the like. It is an object to provide an automatic door that can be easily installed without false detection.

In order to achieve such an object, the present invention has the following configuration.
(1) That is, the automatic door according to the present invention is
A housing,
A pair of upper and lower bending-extension link mechanisms supported by the housing and extending in the lateral direction;
A door supported by each bending-extension link mechanism and reciprocating in the lateral direction;
A single drive member that expands and contracts each bending and stretching link mechanism;
With
Each flexion and extension link mechanism
A proximal arm swingable with respect to the housing;
A distal arm that can swing relative to the free end of the proximal arm,
The drive member is interlocked with both the base end arms of each bending and stretching link mechanism, and the base end arms are swung in opposite directions,
The refractive postures of the proximal arm and the distal arm in each link mechanism are opposite to each other,
The automatic door further rocks the tip arm in the direction opposite to the swing direction of the base arm relative to the base arm in conjunction with the swing of the base arm, and reciprocates the tip of the tip arm in the lateral direction. Equipped with a bending and stretching interlock mechanism to move,
It is an automatic door in which the door is connected to the tip of the tip arm.

  [Operation / Effect] According to the present invention, the housing is installed beside the passage, for example. The case is equipped with a pair of upper and lower bending / extension link mechanisms. The door is cantilevered only by the upper and lower bending / extension link mechanisms, and is in a floating state or a suspended state. Due to the expansion and contraction of the bending and stretching link mechanism, the door moves laterally in parallel along the door surface. Since the movement of the door itself is a simple operation such as sliding, the passage can be smoothly opened and closed. Further, since the bending / extending link mechanism moves the door in a floating state, a rail or the like for guiding or supporting the door is unnecessary. Therefore, the door can be opened and closed quietly.

  Each bending / extension link mechanism has a relatively simple structure in which the proximal end arm and the distal end arm are connected so as to be able to bend and swing.

  Since the upper and lower bending / extension link mechanisms support the door, the weight of the door acts as a force that swings both proximal arms downward. Here, since the drive member is interlocked with each base end arm so as to swing each base end arm in the opposite direction, the downward swinging force of both base end arms is opposite to the drive member. Works in the direction and is offset. As a result, a load based on the weight of the door is not applied to the driving member. For this reason, the load at the time of starting to actuate the drive member and the load at the time of actuating the drive member are about the frictional resistance of each rotating part, and can be small. Therefore, the door can be moved more smoothly.

  The refraction postures of the proximal arm and the distal arm in each link mechanism are opposite to each other, and the rocking direction of the proximal arm with respect to the proximal arm is interlocked with the rocking of the proximal arm. Therefore, when the base end arms are rotated in opposite directions by the rotation of the drive member, the link mechanisms expand and contract in synchronization.

  In addition, since the door is laterally opened and closed, the movement range of the door is within a plane including the door surface. Therefore, even if an optical detection sensor that detects the approach of a passerby is installed, the door that opens and closes does not enter the detection area of the detection sensor, and only a passerby or a passing object approaching the door is erroneously detected. It becomes possible to detect without.

  (2) In the above-described invention, the drive member is a longitudinal drive shaft that rotates in both forward and reverse directions, and the drive shaft is connected to a rotation support shaft that is integrally connected to each base end arm and a bevel gear mechanism. It is preferable that they are linked together.

  According to this configuration, the interlocking structure of the driving member and the bending / extension link mechanism that swings the upper and lower proximal arms in opposite directions can be configured so as to be easily processed and assembled.

  (3) In the above-described invention, it is preferable that the connecting fulcrum at which each tip arm is connected to the door is displaced in the lateral direction.

  When the bending and stretching link mechanism expands and contracts, a force that causes the upper and lower connecting fulcrums to approach or separate from each other may act due to a machining error of each part or a minute bending deformation of the member. However, since each connection fulcrum is connected to the door, the linear distance between the connection fulcrums (hereinafter, referred to as “inter-center distance” as appropriate) is kept constant, and it is prohibited to vary. In this configuration, since each connection fulcrum connected to the door is shifted in the lateral direction, when a force is generated that causes the upper and lower connection fulcrum to approach or separate from each other, this force acts on the door as a couple, The door tilts, and the distance in the vertical direction of the connecting fulcrum changes while the distance between the cores is kept constant. In this way, even if the vertical movement of each connecting fulcrum occurs, the door can be allowed to change by tilting, so that the bending and stretching link mechanism can continue to extend and contract smoothly without falling into a locked state. Can do.

  (4) In the above-described invention, the bending / extension interlocking mechanism is arranged concentrically with the swing center of the proximal arm, and is concentric with the fixed gear fixed to the housing and the swing center of the distal arm with respect to the proximal arm. A driven gear disposed integrally connected to the distal arm, an intermediate gear rotatably supported by the proximal arm, positioned between the fixed gear and the driven gear, and meshing with both the fixed gear and the driven gear; It is preferable to provide.

  According to this configuration, when the proximal end arm is swung, the distal end arm is swung in a direction opposite to the proximal end arm swinging direction with respect to the proximal end arm, and the distal end portion of the distal end arm is preferably laterally moved. be able to.

  Further, the distance between the swing center of the proximal arm and the swing center of the distal arm and the distance between the swing center of the distal arm and the connecting fulcrum are set to be the same, and the pitch diameter of the driven gear is set to the pitch diameter of the fixed gear. By setting it to 1/2 and setting the proximal arm and the distal arm at the same forward and reverse angles with respect to the vertical line, the vertical movement of the pivot center of the distal arm accompanying the pivot of the distal arm and The vertical movement of the connecting fulcrum is offset, and the connecting fulcrum moves horizontally.

  (5) In the above-described invention, it is preferable that the detection area for detecting passersby and objects includes a surface sensor that is a plane along the door.

  According to this configuration, since the door only reciprocates in the lateral direction, the detection area of the surface sensor can be set to an area close to the door surface, or can be set to a plane substantially parallel to the door surface. . Thereby, the approach of a passerby etc. to a door, and the passerby etc. near a door can be detected. In addition, since the door does not enter the detection area even if the door is activated, the surface sensor can always reliably detect a person or an object. Therefore, the door can be operated more safely, and it is possible to appropriately detect the wrong passage without overlooking it.

  As described above, according to the present invention, the door can be opened and closed smoothly and lightly in a small movement area with a relatively simple structure, and a sensor that detects the approach of a passer-by is not erroneously detected. It is possible to provide an automatic door that can be easily installed.

1 is an overall perspective view of an automatic door according to the present invention. It is the front view which notched a part of automatic door. It is the top view which notched a part of automatic door. It is a side view of an automatic door. It is a front view of the opening-closing structure which abbreviate | omitted the base board. It is a perspective view of an opening / closing structure. It is a front view which shows another Example of an opening / closing structure. It is a front view which shows another Example of an opening / closing structure. It is a front view which shows the modification of an opening / closing structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 shows an overall perspective view of an automatic door 1 according to the present invention, FIG. 2 shows a front view of the automatic door 1, and FIG. 3 shows a plan view of the automatic door 1. The automatic door 1 of this embodiment is used as a security gate. The housing 3 is installed upright on both the left and right sides of the passage T serving as the entrance / exit of the security area A partitioned by the partition wall 2. Both housings 3 are each equipped with a door 4. The pair of left and right doors 4 can move in and out sideways. “Landscape” and “lateral direction” are the left and right directions of the door 4 in a front view as shown in FIG. The passage T is opened and closed by the reciprocating sliding movement of the door 4.

  4 to 6 show the opening / closing structure of the door 4. Hereinafter, the open / close structure will be described in detail with reference to these drawings. In addition, since the opening / closing structure of the left and right doors is configured symmetrically, only one (right) opening / closing structure will be described.

  A base plate 5 is erected inside each housing 3. The housing 3 and the base plate 5 are integrally connected. Two sets of bending and stretching link mechanisms 6 are provided at two locations on the back side of the base plate 5. Each bending-extension link mechanism 6 can extend and contract in the lateral direction. These bending and stretching link mechanisms 6 support the door 4. The door 4 is translated left and right by the bi-stretching link mechanism 6 being bent and stretched in synchronization.

  Each bending / extension link mechanism 6 includes a proximal end arm 7 and a distal end arm 8. The base end arm 7 is supported by the base plate 5 so as to be swingable around the base end fulcrum a in the front-rear direction (that is, the horizontal direction orthogonal to the horizontal direction). The proximal end fulcrum a is the center of swing of the proximal arm 7 with respect to the housing 3. The distal end arm 8 is supported on the free end portion of the base end arm 7 so as to be able to refract and oscillate around the fulcrum b in the front-rear direction. The refraction fulcrum b is the swing center of the distal arm 8 relative to the proximal arm 7. A connecting support shaft 9 is supported at the tip of each tip arm 8 so as to be freely rotatable around the connecting fulcrum c. A door 4 is connected and fixed to each connecting support shaft 9. Thus, the door 4 is cantilevered by the upper and lower bending / extension link mechanisms 6. The door 4 is kept floating from the floor of the passage T. There is no member that slides on the door 4 such as a rail for guiding the door 4. The door 4 is supported only by the bending / stretching link mechanism 6 and opens and closes in a floating state. For this reason, the noise at the time of the movement of the door 4 can be reduced, and the channel | path T can be opened and closed quietly.

  A rotation support shaft 10 inserted through the base plate 5 is disposed laterally at the base end fulcrum a in each bending and stretching link mechanism 6. The rotation support shaft 10 is rotatably supported by the base plate 5. A proximal arm 7 is integrally connected to one end of the rotating spindle 10. A passive bevel gear 11 is fixed to the other end of the rotary spindle 10.

  A drive shaft 12 is disposed vertically on the front side of the base plate 5. Drive bevel gears 13 are fixed to the top and bottom of the drive shaft 12. Each drive bevel gear 13 is engaged with the upper and lower passive bevel gears 11, respectively. The lower end portion of the drive shaft 12 is interlocked and connected to an electric motor 15 with a speed reducer via a coupling 14. By the forward / reverse drive of the electric motor 15, the drive shaft 12 rotates in both forward and reverse directions. In conjunction with the rotation of the drive shaft 12, the upper and lower rotary support shafts 10 rotate. As described above, the drive shaft 12 and each rotation support shaft 10 are connected via the bevel gear mechanism including the drive bevel gear 13 and the passive bevel gear 11.

  Here, the upper and lower drive bevel gears 13 connected to the drive shaft 12 are engaged with the upper and lower passive bevel gears 11 in opposite postures. Thereby, when the drive shaft 12 rotates in one direction, the upper and lower rotary support shafts 10 rotate in opposite directions, and the upper and lower proximal arms 7 swing in opposite directions. The swing angles of the upper and lower base end arms 7 are substantially equal.

  A fixed gear 16 is further arranged on the back side of the base plate 5 so as to be concentric with the base end fulcrum a. The fixed gear 16 is fixed to the base plate 5. A refraction support shaft 17 is inserted and supported at the free end portion of the base end arm 7 so as to be rotatable around a refraction support point b. A tip arm 8 is integrally connected to one end of the bending support shaft 17, and a driven gear 18 is fixed to the other end. Further, an intermediate gear 19 is pivotally supported on the base end arm 7 so as to be freely rotatable. The intermediate gear 19 is disposed between the fixed gear 16 and the driven gear 18 and meshes with both the gears 16 and 18. That is, the driven gear 18 is linked to the fixed gear 16 via the intermediate gear 19. The pitch diameter of the driven gear 18 is set to one half of the pitch diameter of the fixed gear 16.

  The distance between the fulcrums a-b in the proximal arm 7 and the distance between the fulcrums bc in the distal arm 8 are set to be the same. The proximal arm 7 and the distal arm 8 connected to each other are set so as to be symmetrical with respect to the vertical line.

  When the base end arm 7 swings with respect to the base plate 5, the refractive support shaft 17 and the front end arm 8 connected thereto swing relative to the base end arm 7. The swing angle of the distal arm 8 is twice the swing angle of the proximal arm 7, and the swing direction of the distal arm 8 is opposite to the swing direction of the proximal arm 7. The connecting support shaft 9 provided at the tip of the tip arm 8 moves linearly and laterally.

  The refraction postures of the upper and lower bending / extension link mechanisms 6 (bending shapes of the proximal arm 7 and the distal arm 8) are set in opposite directions. In this embodiment, the upper bending / extending link mechanism 6 is bent into a valley fold, and the lower bending / extending link mechanism 6 is bent into a mountain fold.

  For this reason, when the upper and lower base end arms 7 swing in opposite directions, both the connecting support shafts 9 move forward and backward in the same direction. That is, when the drive shaft 12 rotates, the upper and lower bending / extension link mechanisms 6 are synchronized and bent, and the door 4 moves laterally in parallel.

  By the way, the total weight of the door 4 is applied to the upper and lower bending / extension link mechanisms 6. A force to swing downward is applied to each base end arm 7, and a force to rotate in the same direction is applied to each rotation support shaft 10. The force acting on each rotation spindle 10 is transmitted to the drive shaft 12 but is always canceled out. For example, when one rotary support shaft 10 applies a force to rotate the drive shaft 12 in the forward direction, the other rotary support shaft 10 is always rotated in the reverse direction with respect to the drive shaft 12. The force is applied. As a result, the two forces that attempt to rotate each rotary shaft 10 always cancel each other out on the drive shaft 12, and apparently the weight of the door 4 does not act on the drive shaft 12.

  Therefore, if the drive shaft 12 is not rotated by the electric motor 15, the drive shaft 12 is not rotated by the weight of the door 4, so that the door 4 can be stably kept stationary. Moreover, when starting the movement of the door 4, since the starting load of the electric motor 15 may be small, the opening / closing operation | movement of the door 4 can be started smoothly. Further, since the load of the electric motor 15 does not change depending on the position of the door 4 even during the movement of the door 4, a smooth movement of the door 4 can be realized.

  Further, in this embodiment, the relatively light driving shaft 12 is employed as the driving member, so that the moment of inertia due to the rotation of the driving shaft 12 is small. Therefore, the rotation / stop of the drive shaft 12 can be switched smoothly, and the movement / stop of the door 4 can be switched more smoothly.

  Further, the weight of the door 4 is not only applied to each proximal arm 7 but also applied to the distal arm 8. That is, a force is applied to the distal arm 8 to swing downward with respect to the proximal arm 7. This force acts on the fixed gear 16 via the refractive support shaft 17, the driven gear 18 and the intermediate gear 19, and is received by the fixed gear 16. Thus, since the fixed gear 16 comprised integrally with the housing | casing 3 is supporting a part of weight of the door 4, the door 4 can be suitably supported also only by the bending / extension link mechanism 6. FIG.

  In the support structure of the door 4 described above, the door 4 can be manually pushed and moved lightly. However, since the electric motor 15 cannot be reversely operated from the driving counterpart by the speed reducer, the door 4 is fixed when the electric motor 15 stops operating and cannot be manually opened and closed.

  In addition, when the upper and lower bending / stretching link mechanisms 6 having opposite refraction postures are synchronously bent and extended, the upper and lower connections are caused by minute play at each fulcrum, bending deformation of the member, backlash at the gear occlusion, and the like. The fulcrum c tends to be slightly pulsated up and down. Here, if the upper and lower connecting fulcrum c are installed on the vertical line, the door 4 connected to the connecting fulcrum c works as a tension member that prevents the connecting fulcrum c from moving toward or away from each other, and the connecting fulcrum c When the vertical displacement exceeds the allowable amount, the bending / extension link mechanism 6 is locked so that the door 4 cannot be opened and closed.

  Therefore, in the present invention, as shown in FIG. 5, the upper and lower connecting fulcrums c are laterally moved by a small distance d by setting the base fulcrum a in the upper and lower bending / extension link mechanisms 6 slightly shifted in the lateral direction. The doors 4 in the closed state are connected and fixed so that the doors 4 are closed without being inclined to the connection support shafts 9 of the upper and lower connection support points c shifted in the lateral direction.

  In FIG. 5, when the upper and lower connecting fulcrums c are displaced in directions approaching each other, the door 4 is tilted by receiving a counterclockwise couple from the upper and lower connecting fulcrums c. Conversely, when the upper and lower connecting fulcrums c are displaced in directions away from each other, the door 4 is tilted by receiving a clockwise couple from the upper and lower connecting fulcrums c. In any case, when the door 4 tilts, the vertical displacement of the upper and lower connecting fulcrum c connected to the door 4 with a constant center distance is allowed, and the bending / extension link mechanism 6 can be smoothly moved into the locked state. Can open and close.

  Next, an example of the usage form of the automatic door will be described.

  In the automatic door 1 of this example used as a security gate, a verification device 21 is provided at an appropriate position of the housing 3. Various known authentication systems can be used for the verification device 21. For example, one that uses a data storage medium such as a magnetic card or an IC card, one that uses image data such as a face, retina, advisory, or other measurement data as collation data may be appropriately selected. it can.

  The housing 3 is provided with a pair of optical surface sensors 22. Each surface sensor 22 detects the presence or absence of a passerby or a passing object in a detection area on the passage T along the front side (front side) and the back side (back side) of the door 4.

  The surface sensor 22 irradiates and scans laser light or LED light in a vertical plane substantially parallel to the door surface of the door 4 (the front surface or the rear surface that appears when the door 4 is viewed from the front). Detect the approach of objects such as passers-by and obstacles. Then, when the door 4 is opened, if both the surface sensors 22 detect that the passerby has left the detection area, the door 4 is automatically closed and operated. Alternatively, when one surface sensor 22 detects that a specific passerby recognized by the verification device 21 has approached the door 4, the door 4 is automatically opened and the passer is out of the detection area. Is detected by the other surface sensor 22, the door 4 is automatically closed.

  In this example, since the housing 3 is configured to be low, a guard fence 23 for preventing intrusion is erected on the housing 3. In addition, the surface sensors 22 are arranged in both the left and right housings 3 so that the detection areas of the surface sensors 22 extend to the upper area of the housing 3 or the installation area of the guard fence 23 facing each other. Thereby, it is possible to detect a suspicious person who tries to get over the housing 3 and the guard fence 23 and enter the security area A. When the surface sensor 22 detects a suspicious person, the alarm device is activated.

  Further, the rotation amount of the drive shaft 12 is detected by a rotary encoder 26 including a disk 24 with a slit and an optical sensor 25 opposed to the outer periphery thereof, and the position of the door 4 and the opening / closing operation speed based on the detected data. , Etc. are calculated and measured, and motor stop control when the door 4 reaches the closed position and the open position, or alarm control when the door 4 stops due to an accident or the like during movement is performed.

  The present invention can also be implemented in the following forms.

  (1) If the coupling 14 that connects the drive shaft 12 and the electric motor 15 is configured to have a clutch function that can be held in a disconnected state by a manual operation, power supply is stopped due to an accident or a failure of the electric motor 15 itself. The door 4 can be manually opened by disengaging the clutch of the coupling 14 in an emergency such that the electric motor 15 becomes inoperable due to the above.

  (2) As means for driving the bending / extension / linkage mechanism 6, various structures can be used in addition to using the drive shaft 12 and the bevel gear mechanism as described above. For example, as shown in FIG. 7, operating arms 27 are connected to the respective rotation support shafts 10 in the upper and lower bending / extension link mechanisms 6, and each operating arm 27 is arranged between the upper and lower bending / extension link mechanisms 6. It is also possible to link both ends of the rotary support shafts 10 via linkage links 29, and to swing both rotary support shafts 10 in opposite directions by forward and reverse swinging of the drive arm 28. In this case, not only the electric motor 15 but also an electric cylinder can be used as a driving source for operating the driving arm 28 as a single driving member.

  Also in this example, by providing a means for interrupting power transmission between the drive arm 28 and the drive source, in the event of an emergency, the transmission is interrupted to free the drive arm 28 and the door 4 is manually opened. be able to.

  (3) Further, as shown in FIG. 8, the worm wheel 30 is connected and fixed to each rotation support shaft 10 in the upper and lower bending / extension link mechanism 6, and is engaged with each worm wheel 30 to the drive shaft 12 as a drive member. By providing the worm gear 31 and setting the pitch angles of the worm gears 31 to be opposite, the rotation support shafts 10 can be rotated in opposite directions by the rotation of the drive shaft 12. In this case, the electric motor 15 does not include a speed reducer or has a speed reduction with a small reduction ratio, and the door 4 can be opened and closed at an appropriate speed by rotating the drive shaft 12 at a high speed. .

  In this example in which the rotation operation from the worm wheel 30 side is impossible, the door 4 cannot be manually operated and opened. Therefore, in an emergency when the electric motor 15 becomes inoperable, the coupling 14 with the clutch function is clutched. The door 4 may be opened by switching to the cut state and manually rotating the drive shaft 12 using an emergency operation handle or the like prepared separately.

  (4) A separate power mechanism for rotating the casing 3 itself around the vertical fulcrum with respect to the partition wall 2 is provided separately. Usually, the casing 3 is appropriately fixed to a proper installation position by a lock mechanism, and the door 4 When the drive cannot be opened or when large equipment is carried into or out of the security area A, the lock can be released and the automatic door 1 can be swung together with the housing 3 to greatly open the passage T. It becomes possible.

  (5) The casing 3 that can be swiveled as described above or the base plate 5 that supports the door 4 is configured to be capable of being driven to swivel by another electric motor or the like. It is also possible to automatically open and close the passage T in combination with the swiveling.

  (6) As another means for avoiding the appearance of the locked state due to the vertical displacement of the upper and lower connection fulcrum c, for example, as shown in FIG. 9, the connection support shaft 9 and the door 4 are connected at the lower connection fulcrum c. At the upper connection fulcrum c, the connection support shaft 9 is inserted into the upper and lower elongated holes 32 formed in the door 4 so that the distance between the centers of the upper and lower connection fulcrum c can be changed. In this case, the upper and lower connecting fulcrum c can be installed on the vertical line. However, in this structure, the weight of the door 4 is concentrated on the lower connecting fulcrum c where there is no vertical interchange, and the upper connecting fulcrum c is only for maintaining the standing posture of the door 4, so at least the door It is necessary to increase the strength of the bending / extension link mechanism 6 on the side supporting the weight and the driving structure thereof, and the door 4 is rattled due to manufacturing errors or wear due to vertical sliding displacement at the upper connection fulcrum c. It is desirable to take measures to prevent it.

  (7) If the bending / extending stroke of the bending / extending / linking mechanism 6 is made large, it is possible to provide a one-sided automatic door having only one door 4.

  (8) The automatic door 1 according to the present invention can also be used as a simple automatic opening / closing door that automatically releases and detects the approach of an unspecified passerby.

DESCRIPTION OF SYMBOLS 1 ... Automatic door 3 ... Housing 4 ... Door 5 ... Base plate 6 ... Bending-extension link mechanism 7 ... Base end arm 8 ... Front end arm 9 ... Connection support shaft 10 ... Rotary support shaft 11 ... Passive bevel gear (bevel gear mechanism)
12 ... Drive shaft (drive member)
13 ... Drive bevel gear (bevel gear mechanism)
16 ... Fixed gear (flexion and extension interlocking mechanism)
17… Refraction support shaft 18… Driven gear (flexion and extension interlocking mechanism)
19 ... Intermediate gear (flexion and extension interlocking mechanism)
22 ... Surface sensor 28 ... Drive arm (drive member)
a ... Base fulcrum b ... Refraction fulcrum c ... Connection fulcrum

Claims (5)

An automatic door,
A housing,
A pair of upper and lower bending-extension link mechanisms supported by the housing and extending in the lateral direction;
A door supported by each bending-extension link mechanism and reciprocating in the lateral direction;
A single drive member that expands and contracts each bending and stretching link mechanism;
With
Each flexion and extension link mechanism
A proximal arm swingable with respect to the housing;
A distal arm that can swing relative to the free end of the proximal arm,
The drive member is interlocked with both the base end arms of each bending and stretching link mechanism, and the base end arms are swung in opposite directions,
The bending postures of the proximal arm and the distal arm in each bending and stretching link mechanism are opposite to each other,
The automatic door further rocks the tip arm in the direction opposite to the swing direction of the base arm relative to the base arm in conjunction with the swing of the base arm, and reciprocates the tip of the tip arm in the lateral direction. Equipped with a bending and stretching interlock mechanism to move,
An automatic door with a door connected to the tip of the tip arm. In the automatic door according to claim 1,
The drive member is a vertical drive shaft that rotates in both forward and reverse directions,
The drive shaft is an automatic door that is linked to a rotating support shaft that is integrally connected to each base arm via a bevel gear mechanism. In the automatic door according to claim 1 or 2,
An automatic door in which the connecting fulcrum where each tip arm is connected to the door is displaced laterally. In the automatic door in any one of Claim 1 to 3,
The flexion and extension interlocking mechanism
A fixed gear disposed concentrically with the pivot center of the proximal arm and fixed to the housing;
A driven gear that is arranged concentrically with the pivot center of the distal arm relative to the proximal arm, and is connected integrally with the distal arm;
An intermediate gear that is rotatably supported by the proximal arm, is positioned between the fixed gear and the driven gear, and meshes with both the fixed gear and the driven gear;
Equipped with automatic door. In the automatic door in any one of Claim 1 to 4,
An automatic door provided with a surface sensor whose detection area for detecting passersby and objects is a plane along the door.

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