JP2018076746A - Automatic closing door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic closing door with a simple constitution while minimizing the space for installing a door.SOLUTION: An automatic closing door comprises a door part for blocking a passage, an opening/closing shaft in an edge part of the door part which rotates according to the opening/closing of the door part, a support cylindrical member for supporting the rotation of the opening/closing shaft, and a pivotally supported rolling body in the outer periphery of the opening/closing shaft for supporting a load of the door in the shaft direction of the opening/closing shaft. An edge surface of the support cylindrical member has an inclined surface spirally formed inclining to the horizontal surface. The rolling body rolls along the inclined surface of the support cylindrical member according to opening/closing of the door part. When the door part is closed, the rolling body is positioned in the lower part of the inclined surface. When the door part is opened, the rolling body is positioned higher than when the door part is closed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic closing door having a structure for automatically closing.

  Conventionally, in a facility in a factory, a safety fence surrounding the facility has been provided in order to ensure safety for the facility in operation. The safety fence is provided with a door that opens and closes so that an operator can enter inside the safety fence when necessary.

  For example, Patent Document 1 discloses an automatic closing door provided on a safety handrail and automatically closed. The automatic closing door is configured to rotate and open about an opening / closing axis when pushed by hand. The opening / closing axis is inclined, and when the hand is released from the automatic closing door in the open state, the automatic closing door closes by its own weight.

Japanese Utility Model Publication No. 4-82184

  However, in the automatic closing door of Patent Document 1, the opening / closing axis of the automatic closing door is installed obliquely. Therefore, in the state which opened the automatic closing door, the upper part of the opening-and-closing axis | shaft has protruded to the space side which the operator who arises by opening an automatic closing door passes. Thereby, the space which installs a rotating shaft became large, and there existed a subject that the space where an operator would pass became narrow.

  The present invention solves the above-described problems, and an object thereof is to provide an automatic closing door that automatically closes while minimizing the installation space.

  An automatic closing door according to the present invention includes a door portion that closes a passage, an opening and closing shaft that is provided at an end of the door portion, and that rotates when the door portion is opened and closed, and a support cylinder that supports the rotation of the opening and closing shaft. A member, and an axially supported rolling element that is provided on an outer periphery of the opening and closing shaft and supports a load of the door and the opening and closing shaft in an axial direction of the opening and closing shaft, and an end surface of the support cylindrical member is The rolling element includes an inclined surface that is inclined with respect to a horizontal plane, and the rolling element rolls along the inclined surface of the support cylindrical member as the door portion opens and closes, and the door portion is closed. When the door is open, it is positioned below the inclined surface, and when the door is open, it is positioned higher than when the door is closed.

  According to the automatic closing door of the present invention, with the above structure, when the operator opens the door, it is automatically closed, and the rotation axis of the door can be installed vertically. Thereby, it is possible to install an automatic closing door that automatically closes with a simple configuration while minimizing the space for installing the door.

It is a perspective view of the automatic closing door which concerns on Embodiment 1 of this invention. It is an enlarged view of the A section of FIG. It is a schematic diagram explaining the movement of the automatic closing door of FIG. It is a perspective view of the automatic closing door which concerns on Embodiment 2 of this invention. It is an enlarged view of the B section of FIG. It is a schematic diagram explaining the movement of the automatic closing door of FIG. It is a schematic diagram explaining the movement of the automatic closing door which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Each figure is shown schematically, and the relative size and thickness of each member are not limited to the illustrated dimensions. Moreover, in the following drawings, the relationship of the size of each component may be different from the actual one. In each of the drawings, devices and the like having the same reference numerals represent the same or equivalent devices, which are common throughout the entire specification.

[Embodiment 1]
FIG. 1 is a perspective view of an automatic closing door 100 according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. FIG. 3 is a schematic diagram for explaining the movement of the automatic closing door 100 of FIG. 1. The automatic closing door 100 is installed around the equipment in the factory, and is provided in a part of the safety fence 50 so that an operator does not inadvertently enter the vicinity of the operating equipment. The automatic closing door 100 may be provided at a plurality of locations of the safety fence 50. Although the safety fence 50 is installed around the facility, since an operator enters the safety fence 50 when necessary, it is necessary to secure a passage through which the worker can pass in part. The automatic closing door 100 normally closes the passage 60 and opens when necessary to allow an operator to pass therethrough.

  The automatic closing door 100 has a door portion 10 that closes a passage 60 provided in the safety fence 50. The door part 10 is formed, for example, by bending a metal pipe into a rectangle. The upper door portion 11 and the lower door portion 13 extend in the horizontal direction so that an operator cannot enter the passage 60 provided in the safety fence 50. The door front end 12 connects the door upper part 11 and the door lower part 13. In addition, the door tip 12 is provided with a stopper 15 for holding the passage 60 in a closed state when the automatic closing door 100 is closed. The stopper 15 protrudes from the front end of the door portion 10 and comes into contact with a part of the safety fence 50 adjacent to the automatic closing door 100 as shown in FIG. In addition, the form of the door part 10 is not limited to a shape as shown in FIGS. 1-3, What is necessary is just to obstruct | occlude the channel | path 60. FIG.

  In the door portion 10, an opening / closing shaft 20 is provided at an end portion opposite to the door portion front end portion 12. The opening / closing shaft 20 is formed in a cylindrical shape extending in the vertical direction. A portion below the door portion lower portion 13 of the opening / closing shaft 20 is located inside the support cylindrical member 30. The outer diameter of the opening / closing shaft 20 is supported by the support cylindrical member 30, and the door portion 10 is configured to open and close by rotating about the opening / closing shaft 20.

  As shown in FIG. 2, the opening / closing shaft 20 is provided with a rolling element 40. The rolling element 40 is positioned on the outer periphery of the opening / closing shaft 20 and is pivotally supported by the rotation shaft 41. The rotating shaft 41 extends in the radial direction of the opening / closing shaft 20, and is configured such that the rolling element 40 that supports the shaft rotates in the rotation direction of the opening / closing shaft 20. Further, the rolling element 40 is disposed on the outer periphery of the opening / closing shaft 20 on the side where the door front end 12 is located. This is because the center of gravity of the automatic closing door 100 is located on the side where the door front end portion 12 is located with respect to the opening / closing shaft 20. The rolling element 40 abuts on the support cylindrical member 30 and supports the downward load of the automatic closing door 100. The opening / closing shaft 20 is inclined toward the door front end 12 with respect to the central axis of the support cylindrical member 30. Therefore, the rolling element 40 can appropriately support the load of the automatic closing door 100 by being installed on the outer periphery of the opening / closing shaft 20 at least on the side where the door portion distal end portion 12 is located.

  The support cylindrical member 30 is a cylindrical member that is fixedly installed on the floor 80 and standing. The support cylindrical member 30 has an open / close bearing 31 that is a cylinder that supports the open / close shaft 20 on the floor side. A rolling element support portion 32 is installed on the upper end of the open / close bearing portion 31. The rolling element support portion 32 is a cylindrical member having a diameter larger than that of the open / close bearing portion 31. The rolling element support portion 32 has an inclined surface 33 formed such that a part of the upper end surface is inclined with respect to the horizontal plane. The inclined surface 33 is provided in a range where the rolling element 40 moves when the automatic closing door 100 is opened. The end surface 34 of the rolling element support portion 32 outside the range in which the rolling element 40 moves is horizontal.

  Next, the movement of the automatic closing door 100 will be described with reference to FIG. FIG. 3A is a diagram illustrating a state in which the automatic closing door 100 is closed. FIG. 3B is a diagram illustrating a state in which the automatic closing door 100 is opened. In FIG. 3A, the rolling element 40 is located on an inclined surface lower portion 37 that is located below the inclined surface 33 of the rolling element support portion 32. The rolling element 40 is pressed downward on the inclined surface lower portion 37 due to gravity applied to the automatic closing door 100, and a force is applied to the door portion 10 in the closing direction. Therefore, the stopper 15 at the tip of the door 10 is kept in contact with the safety fence 50. In the rolling element support portion 32, a vertical portion 35 is formed adjacent to the inclined surface lower portion 37. In the first embodiment, the rolling portion 40 and the vertical portion 35 provided on the rolling element support portion 32 are in contact with each other. Absent.

  When an operator who wants to enter the inside of the safety fence 50 opens the automatic closing door 100 by hand or the like, the rolling element 40 moves upward along the inclined surface 33 from the lower inclined surface 37. When the automatic closing door 100 is opened and opened so that the operator can pass through the passage 60, the rolling element 40 is positioned above the inclined surface 33. At this time, the entire automatic closing door 100 is also moved upward from the state in which the automatic closing door 100 is closed. When the hand is released from the door 10 in this state, the rolling element 40 moves downward along the inclined surface 33. Due to the weight of the automatic closing door 100, the automatic closing door 100 tends to move downward, so that the weight of the automatic closing door 100 is applied to the rolling element 40. Since the rolling element 40 with the dead weight of the automatic closing door 100 tries to move downward along the inclined surface 33, it moves to the lower portion 37 of the inclined surface while rolling on the inclined surface 33. . As the rolling element 40 moves, the door 10 moves to a position where the passage 60 is closed.

(Effect of Embodiment 1)
(1) The automatic closing door 100 according to the first embodiment includes a door 10 that closes a passage, an opening / closing shaft 20 that is provided at an end of the door 10 and rotates as the door 10 opens and closes, and an opening / closing shaft. A supporting cylindrical member 30 that supports the rotation of the opening and closing shaft 20, a rolling element 40 that is supported on the outer periphery of the opening and closing shaft 20 and supports the load of the door 10 and the opening and closing shaft 20 in the axial direction of the opening and closing shaft 20, Is provided. The end surface of the support cylindrical member 30 includes an inclined surface 33 that is inclined with respect to a horizontal plane and configured in a spiral shape. The rolling element 40 rolls along the inclined surface 33 of the support cylindrical member 30 as the door portion 10 is opened and closed. When the door portion 10 is closed, the rolling member 40 is positioned at the lower portion 37 of the inclined surface 33 and the door portion 10. When is open, it is positioned higher than when the door 10 is closed.
By being configured in this way, the automatic closing door 100 is held in a state where the door portion 10 closes the passage 60 during normal times. Further, when the operator releases his / her hand from the state in which the automatic closing door 100 is opened by hand or the like, the rolling element 40 at the upper part of the inclined surface 33 is lowered along the inclined surface 33 by the weight of the automatic closing door 100. Go down in the direction of 37. When the rolling element 40 goes down the inclined surface 33, the opening / closing shaft 20 rotates accordingly, and the automatic closing door 100 automatically closes the passage 60. That is, when the worker passes through the passage 60, the automatic closing door 100 is automatically closed without the operator performing an operation of closing the automatic closing door 100.
In the automatic closing door 100, the rolling elements 40 support the weight of the automatic closing door 100. And it is the structure which the rolling element 40 moves up and down along the inclined surface 33 with opening and closing. Therefore, the automatic closing door 100 that automatically closes even when the opening / closing shaft 20 is provided vertically with respect to the floor can be obtained. Thereby, the space which provides the automatic closing door 100 can be made small, and the replacement | exchange with the existing door is also easy.

In the automatic closing door 100 according to the first embodiment, the rolling element 40 is provided on the side where the center of gravity of the door portion 10 is located.
By being configured in this way, the rolling element 40 is arranged in a direction in which the automatic closing door 100 is inclined, and the rolling element 40 can efficiently support the weight of the automatic closing door 100. Since the center of gravity of the automatic closing door 100 is on the side where the door portion 10 is installed, the opening / closing shaft 20 is inclined toward the side where the door portion 10 is provided. Since the rolling element 40 is arranged on the door 10 side, the rotation of the tilted automatic closing door 100 can support not only the supporting cylindrical member 30 but also the rolling element 40, and the inclination of the opening / closing shaft 20 is suppressed. Can do. Therefore, the automatic closing door 100 is automatically and smoothly closed from the opened state.

[Embodiment 2]
The second embodiment is different from the first embodiment in the shape of the door portion 10 and the support form of the opening / closing shaft 20. In the second embodiment, a spring 280 is further added to the opening / closing shaft 220. In the second embodiment, the description will focus on changes from the first embodiment.

  FIG. 4 is a perspective view of the automatic closing door 200 according to Embodiment 2 of the present invention. FIG. 5 is an enlarged view of a portion B in FIG. FIG. 6 is a schematic diagram for explaining the movement of the automatic closing door 100 of FIG. The automatic closing door 200 according to the second embodiment is installed around a facility in the factory, and is provided in a part of the safety fence 250 so that an operator does not enter the vicinity of the facility in operation. Yes. The automatic closing door 200 may be provided at a plurality of locations on the safety fence. Although the safety fence 50 is installed around the facility, an operator enters the inside of the safety fence 250 when necessary, and therefore it is necessary to secure a passage 60 through which the operator can partially pass. The automatic closing door 200 normally closes the passage 60 and opens when necessary to allow an operator to pass therethrough.

  The automatic closing door 200 has a door portion 210 that closes the passage 60 provided in the safety fence 250. The door part 210 is formed of a metal pipe extending horizontally. The door portion 210 prevents an operator from entering the passage 60 provided in the safety fence 250. The door front end 212 is a stopper for holding the passage 60 in a closed state when the automatic closing door 200 is closed. As shown in FIG. 6A, the door front end portion 212 comes into contact with a part of the safety fence 250 adjacent to the automatic closing door 100.

  In the door part 210, an opening / closing shaft 220 is provided at an end opposite to the door front end part 212. The opening / closing shaft 220 is formed in a cylindrical shape extending in the vertical direction. An upper opening / closing shaft 221 a that is a portion above the door portion 210 of the opening / closing shaft 220 and a lower opening / closing shaft 221 b that is a portion below the door portion 210 are positioned inside the support cylindrical member 230. Both the upper opening / closing shaft 221a and the lower opening / closing shaft 221b are supported by the support cylindrical member 230, and the door portion 10 is configured to rotate around the opening / closing shaft 20 to open / close. In the automatic closing door 200 of the second embodiment, the rolling element 40 is not provided, and the support part 240 provided in the door lower part 213 and the inclined surface 233 provided in the support cylindrical member 230 are in contact with each other. The downward load of the automatic closing door 200 is supported. When the automatic closing door 200 opens and closes, the support portion 240 and the inclined surface 233 slide. The automatic closing door 200 of the second embodiment may have a larger resistance when opening and closing compared to the automatic closing door 100 of the first embodiment having the rolling elements 40. However, since the automatic closing door 200 is supported by the support cylindrical member 230 at the top and bottom of the door portion 210, the inclination of the opening / closing shaft 220 can be reduced. Therefore, the support cylindrical member 230 can accurately support the rotation, and can be smoothly opened and closed even if the rolling element 40 is not provided. Note that the support structure of the opening / closing shaft 220 in the second embodiment may be applied to the automatic closing door 100 of the first embodiment.

  The support cylindrical member 230 is a cylindrical member that is fixedly installed on the floor 80 and standing. The support cylindrical member 230 is provided with an opening 239 in the middle of the cylindrical portion in the vertical direction. The support cylindrical member 230 has an inclined surface 233 formed such that the lower end surface of the opening 239 is inclined with respect to the horizontal plane. The inclined surface 233 is provided in a range where the door part 210 moves when the automatic closing door 200 is opened.

  In the second embodiment, a spring 280 is attached to the lower end of the opening / closing shaft 220. The upper end of the spring 280 is attached to the lower end portion 224 of the opening / closing shaft 220, and the lower end is hooked on a locking portion 238 provided on the support cylindrical member 230. When the opening / closing shaft 220 moves upward, the spring 280 applies a load so as to pull the opening / closing shaft 220 downward. The spring 280 is not limited to a coil spring as shown in FIGS. As long as a load is applied so that the opening / closing shaft 220 is pulled downward when the opening / closing shaft 220 moves upward, another elastic body may be applied.

  Next, the movement of the automatic closing door 200 will be described with reference to FIG. FIG. 6A is a diagram illustrating a state in which the automatic closing door 200 is closed. FIG. 6B is a diagram illustrating a state in which the automatic closing door 200 is opened. In FIG. 6A, the door part 210 is located on the inclined surface lower part 237 located at the lower part of the inclined surface 233. The support portion 240 is pressed downward against the inclined surface lower portion 237 by gravity and a load pulled downward by the spring 280 so that a force is applied to the door portion 210 in the closing direction. Therefore, the door tip end portion 212 is held in contact with the safety fence 250.

  When an operator who wants to enter the inside of the safety fence 250 opens the automatic closing door 200 by hand or the like, the support portion 240 moves upward along the inclined surface 233 from the lower inclined surface 237. When the automatic closing door 200 is opened and opened so that the operator can pass through the passage 60, the support portion 240 is positioned above the inclined surface 233. When the hand is released from the door part 210 in this state, the door part 210 moves downward along the inclined surface 233. This is because the automatic closing door 200 moves downward due to the weight of the automatic closing door 200 and the load that the spring 280 pulls the opening / closing shaft 220 downward. Since the door portion 210 tends to move downward, the support portion 240 moves to the inclined surface lower portion 237 while sliding on the inclined surface 233. Along with the movement, the door part 210 moves to a position where the passage 60 is closed. Note that the spring 280 applied to the second embodiment may be applied to the automatic closing door 100 of the first embodiment. The method of installing the spring 280 is not limited to the form of the second embodiment, and the opening / closing shaft 220 may be urged downward.

(Effect of Embodiment 2)
The automatic closing door 200 according to Embodiment 2 supports a door part 210 that closes the passage, an opening / closing shaft 220 that is provided in the door part 210 and rotates when the door part 210 is opened and closed, and supports the rotation accompanying the opening / closing shaft 20. A support cylindrical member 230 that is provided on the door 210 and a support 240 that supports the load of the door 210 in the axial direction of the opening / closing shaft 220. The support cylindrical member 230 includes an inclined surface 233 that is inclined with respect to a horizontal plane and configured in a spiral shape. The support portion 240 moves along the inclined surface 233 of the support cylindrical member 230 as the door portion 210 is opened and closed. When the door portion 210 is closed, the support portion 240 is positioned below the inclined surface 233 and the door portion 210 is open. Sometimes it is located above the door 210 when it is closed. The opening / closing shaft 220 is urged downward along the direction of the opening / closing shaft 220 by a spring 280. The spring 280 in the second embodiment corresponds to the elastic body of the present invention.
With this configuration, in addition to the effect described in (1) above, the spring 280 pulls the opening / closing shaft 220 downward, so that the automatic closing door 200 is automatically opened from the opened state. Can be closed.

Further, according to the automatic closing door 200 according to Embodiment 2, the support portion 240 is provided on the side where the center of gravity of the door portion 210 is located.
By being configured in this way, the support portion 240 is arranged in a direction in which the automatic closing door 200 is inclined, and the supporting portion 240 can efficiently support the weight of the automatic closing door 200. Since the center of gravity of the automatic closing door 200 is on the side where the door portion 210 is installed, the opening / closing shaft 220 is inclined toward the side where the door portion 210 is provided. By arranging the support part 240 on the door part 210 side, the rotation of the tilted automatic closing door 200 can be supported not only by the support cylindrical member 230 but also by the support part 240, and the inclination of the opening / closing shaft 220 is suppressed. Can do. Therefore, the automatic closing door 200 is automatically and smoothly closed from the opened state.

[Embodiment 3]
In the third embodiment, the spring 280 of the second embodiment is applied to the automatic closing door 100 according to the first embodiment. In the following third embodiment, the description will focus on the changes made to the first embodiment.

  FIG. 7 is a schematic diagram for explaining the movement of the automatic closing door 300 according to the third embodiment of the present invention. In the third embodiment, a spring 380 is attached to the lower end of the opening / closing shaft 320. The upper end of the spring 380 is attached to the lower end portion 324 of the opening / closing shaft 320, and the lower end is hooked on a locking portion 338 provided on the support cylindrical member 30. When the opening / closing shaft 320 moves upward, the spring 380 applies a load so as to pull the opening / closing shaft 320 downward. The spring 380 is not limited to the coil spring as in the second embodiment. As long as a load is applied so that the opening / closing shaft 320 is pulled downward when the opening / closing shaft 320 moves upward, another elastic body may be applied.

(Effect of Embodiment 3)
Similar to the automatic closing door 100 according to the first embodiment, the automatic closing door 300 according to the third embodiment includes the rolling elements 40 on the outer periphery of the opening / closing shaft 320. The rolling element 40 abuts on the support cylindrical member 30 and supports a downward load applied to the door portion 310. In the state where the door 310 is opened as shown in FIG. 7B, not only the weight of the door 310 but also the load that the spring 380 pulls the opening / closing shaft 320 downward is applied to the rolling element 40. The rolling element 40 tends to move downward along the inclined surface 33 due to the weight of the door 310 and the load of the spring 380. Therefore, force is applied to the door 310 in the closing direction. The force in the closing direction generated in the automatic closing door 300 is larger than the first embodiment by the load of the spring 380. Therefore, for example, even when the frictional force in the rotation direction of the opening / closing shaft 320 is large and the door 310 is not easily closed only by the force of the dead weight of the door 310, it is automatically closed by appropriately setting the load of the spring 380. It can be made easier. Further, since the automatic closing door 300 according to the third embodiment includes the rolling elements 40 unlike the second embodiment, the rotation direction of the door portion 310 even if the downward load applied to the door portion 310 is large. The frictional resistance can be reduced. Thereby, the selection range of the load setting of the spring 380 is expanded.

  DESCRIPTION OF SYMBOLS 10 Door part, 11 Door part upper part, 12 Door part front-end | tip part, 13 Door part lower part, 15 Stopper, 20 Opening-closing axis | shaft, 30 Supporting cylindrical member, 31 Opening-closing bearing part, 32 Rolling body support part, 33 Inclined surface, 34 End surface 35 Vertical part, 37 Lower part of inclined surface, 40 Rolling element, 41 Rotating shaft, 50 Safety fence, 60 Passage, 80 Floor, 100 Automatic closing door, 200 Automatic closing door, 210 Door part, 212 Door part tip part, 213 Door part Lower part, 220 Opening / closing axis, 221a Upper opening / closing axis, 221b Lower opening / closing axis, 224 Lower end part, 230 Support cylindrical member, 233 Inclined surface, 237 Inclined surface lower part, 238 Locking part, 239 Opening part, 240 Support part, 250 Safety fence 280 Spring, 300 Automatic closing door, 310 Door part, 320 Opening / closing axis, 324 Lower end part, 338 Locking part, 380 Spring

Claims (6)

A door for closing the passage,
An opening / closing shaft provided at an end of the door portion and rotating in accordance with opening / closing of the door portion;
A supporting cylindrical member that supports rotation of the opening and closing shaft;
A rolling element that is provided on the outer periphery of the opening and closing shaft and supports the load of the door and the opening and closing shaft in the axial direction of the opening and closing shaft;
The end surface of the support cylindrical member is
It has an inclined surface that is inclined with respect to the horizontal plane and configured in a spiral shape,
The rolling element is
Rolling along the inclined surface of the support cylindrical member with the opening and closing of the door portion,
When the door is closed, it is located at the lower part of the inclined surface,
An automatic closing door positioned above the door when the door is open than when the door is closed. The opening and closing shaft is
The automatic closing door according to claim 1, wherein the automatic closing door is urged downward along the direction of the opening / closing axis by an elastic member. The rolling element is
The automatic closing door according to claim 1 or 2 provided in the side in which the gravity center of said door part is located. A door for closing the passage,
An opening / closing shaft that is provided in the door portion and rotates in accordance with opening and closing of the door portion;
A supporting cylindrical member that supports rotation of the opening and closing shaft;
A support portion provided on the door portion and supporting a load of the door portion and the opening / closing shaft in an axial direction of the opening / closing shaft;
The end surface of the support cylindrical member is
It has an inclined surface that is inclined with respect to the horizontal plane and configured in a spiral shape,
The support part is
Moves along the inclined surface of the support cylindrical member with the opening and closing of the door portion,
When the door is closed, it is located at the lower part of the inclined surface,
When the door is open, it is positioned above the door is closed,
The opening and closing shaft is
An automatic closing door urged downward along the direction of the opening / closing axis by an elastic member. The support part is
The automatic closing door according to claim 4, which is provided on a side where the center of gravity of the door portion is located. The support part is
It is provided on the outer periphery of the opening and closing shaft, and is constituted by a rolling element that is pivotally supported.
The rolling element is
Rolls along the end surface of the support cylindrical member as the door portion opens and closes.
The automatic closing door according to claim 4 or 5.

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