Automatic door opening and closing device

Abstract

To provide an automatic door opening and closing device capable of dividing a base plate even in a portion where a roller runs while ensuring strength when fixed to a frame.SOLUTION: Provided is an automatic door opening and closing device including: a rail portion extending in the left-right direction and having a first section on the left side and a second section to the right of the first section, supporting a roller attached to the door so that it can move freely from the first section to at least the second section; a first base plate supporting the first section of the rail portion from below; a second base plate supporting the second section of the rail portion from below; and a connecting plate removably connecting the first base plate and the second base plate.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an automatic door opening and closing device. [Background technology]

[0002] There are known automatic door opening and closing devices that have rails that are fixed to the frame and that support rollers attached to the automatic door so that they can move freely.The automatic door opening and closing device has a base plate that supports the rails.The base plate has a section where the rollers do not move, such as the center section in a double-opening automatic door.

[0003] The base plate is long in the direction in which the rollers run, so it may be split during transportation. For example, in the automatic door splitting device described in Patent Document 1, the base plate can be split at the part where the rollers do not run. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-242520 Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if the base plate is divided at the section where the rollers do not run, the length of the base plate may be long enough to make transportation difficult.On the other hand, if the base plate is divided at the section where the rollers run, there is a risk that the strength of the automatic door opening and closing device will be reduced when it is fixed to the frame.

[0006] The object of the present invention is to provide an automatic door opening and closing device in which the base plate can be separated even in the area where the rollers run, while ensuring strength when fixed to the stile. [Means for solving the problem]

[0007] In order to solve the above problems, the automatic door opening and closing device of the present invention extends in the left-right direction and has a first section on the left side and a second section to the right of the first section, and is equipped with a rail section that supports a roller attached to the door so that it can move freely from the first section to at least the second section, a first base plate that supports the first section of the rail section from below, a second base plate that supports the second section of the rail section from below, and a connecting plate that removably connects the first base plate and the second base plate. [Effects of the Invention]

[0008] According to the present invention, an automatic door opening and closing device can be provided in which the base plate can be separated even in the area where the rollers run, while ensuring strength when fixed to the frame. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a front view of the automatic door with the housing removed. [Figure 2] FIG. 2 is a front view of the automatic door opening and closing device with the housing removed. [Figure 3] 1 is a cross-sectional view showing an automatic door opening and closing device cut along a plane perpendicular to the left-right direction at a location where a connecting plate is provided. FIG. [Figure 4] 4 is a cross-sectional view showing a cross section of the base plate portion when cut along a plane perpendicular to the left-right direction at a location where a connecting plate is provided. FIG. [Figure 5] 5 is an enlarged view of the base plate portion at D4 shown in FIG. 4. FIG. [Figure 6] FIG. [Figure 7] 7 is a cross-sectional view of the connecting plate shown in FIG. 6 taken along line F6-F6. [Figure 8] FIG. 10 is a front view showing the state in which the terminal block is attached to the connection plate. [Figure 9] 9 is a cross-sectional view of the connecting plate shown in FIG. 8 taken along line F8-F8. [Figure 10] FIG. 10 is a front view showing the terminal block attached to the first base plate. [Figure 11]FIG. 10 is a front view showing the terminal block attached to the connection plate and the second base plate. [Figure 12] FIG. 10 is a front view showing a modified example of the connecting plate. [Figure 13] FIG. 10 is a front view showing a modified example of the automatic door. DETAILED DESCRIPTION OF THE INVENTION

[0010] An automatic door opening and closing device according to an embodiment will be described below with reference to the drawings. In the following description, components having the same or similar functions will be assigned the same reference numerals. Duplicate descriptions of those components may be omitted.

[0011] The automatic door opening and closing device of the embodiment is fixed to the frame of an automatic door when used. In this specification, the left-right direction X is defined based on the direction in which the automatic door opening and closing device is viewed from a user standing in front of the automatic door opening and closing device fixed to the frame of the automatic door. The front-to-back direction Y is also defined by defining the side closer to the user standing in front of the automatic door opening and closing device as the "front" and the side farther from the automatic door opening and closing device as the "rear." In the drawings, the +X direction is the right direction, the -X direction is the left direction, the +Y direction is the rearward direction, the -Y direction is the forward direction, the +Z direction is the upward direction, and the -Z direction is the downward direction.

[0012] [Automatic Door 500] The automatic door 500 will be described with reference to Figures 1 to 13. First, the overall configuration of the automatic door 500 will be described. However, the automatic door 500 does not need to have all of the components described below, and some components may be omitted as appropriate.

[0013] Fig. 1 is a front view of an automatic door 500, showing the state in which the housing 4 has been removed. In order to avoid complicating the drawing, Fig. 1 shows only the elements related to the automatic door opening and closing device 100 that are necessary for explaining the present invention, and for example, drive members, control units, etc. are omitted.

[0014] The automatic door 500 includes an automatic door opening and closing device 100, a door 200, and a frame 300. The door 200 is a sliding door that opens and closes by moving in the left-right direction X. The door 200 has a first door 210 and a second door 220. The door 200 is a double-swing door, and the automatic door 500 is also a double-swing automatic door. The first door 210 is located on the left side, and the second door 220 is located to the right of the first door 210. When the first door 210 and the second door 220 are closed, the center in the left-right direction X forms the boundary between the first door 210 and the second door 220. Note that in this embodiment, the automatic door opening and closing device 100 is installed in a double-swing automatic door, but the type of automatic door to which it is installed is not limited, and it may be installed in a single-swing automatic door, for example.

[0015] The stile 300 forms the frame of the automatic door 500 and is formed at the entrance or exit of a building. The automatic door opening and closing device 100 is fixed to the front of the upper stile of the stile 300. The automatic door opening and closing device 100 is provided with a rail section 6, which will be described later, and rollers 8 run on the upper surface of the rail section 6. The door 200 is suspended from the rollers 8 via brackets 9.

[0016] [Automatic door opening and closing device 100] Fig. 2 is a front view of the automatic door opening and closing device 100 with the housing 4 removed. Fig. 3 is a cross-sectional view of the automatic door opening and closing device 100 taken along a plane perpendicular to the left-right direction X at the location where the connecting plate 5 is provided. In order to avoid complicating the drawing, Fig. 3 shows only the components of the automatic door opening and closing device 100 that are necessary for explaining the present invention, and for example, drive members, control units, etc. are omitted.

[0017] The automatic door opening and closing device 100 comprises a housing 4, a base plate 10, a connecting plate 5, a rail 6, a cushioning material 7, a roller 8, a drive member (not shown), an object detection sensor (not shown), and a control unit (not shown). The automatic door opening and closing device 100 is fixed to a frame 300 to support the roller 8 attached to the automatic door 500 so that it can move freely. The automatic door opening and closing device 100 is an automatic door opening and closing device in which the base plate 10 can be divided into a first base plate 1, a second base plate 2, and a third base plate 3.

[0018] The housing 4 has an upper wall 41, a lower wall 42, a front wall 43, a rear wall 44, a left wall (not shown), and a right wall (not shown). The upper wall 41 and the lower wall 42 extend in the left-right direction X and the front-rear direction Y. The front wall 43 extends downward from the front end of the upper wall 41. The rear wall 44 extends downward from the rear end of the upper wall 41 and is connected to the rear end of the lower wall 42. The left wall (not shown) extends downward from the left end of the upper wall 41 and is connected to the left end of the lower wall 42. The right wall (not shown) extends downward from the right end of the upper wall 41 and is connected to the right end of the lower wall 42. A rear surface 44b of the rear wall 44 is fixed to the front surface of the upper stile of the stile 300 of the automatic door 500. The rear wall 44 may be secured to the stile 300 by bolts or by welding.

[0019] The length of the housing 4 from the left wall (not shown) to the right wall (not shown) is greater than the length from the front wall 43 to the rear wall 44. That is, the housing 4 is a box-shaped member extending in the left-right direction X. Because the housing 4 is box-shaped, it can store the base plate 10, the connecting plate 5, the rails 6, etc.

[0020] The front end 42f of the lower wall 42 is not connected to the lower end 43d of the front wall 43. That is, a gap 45 extending in the left-right direction X and the front-rear direction Y is present between the front end 42f of the lower wall 42 and the lower end 43d of the front wall 43. A door 200 extending in the left-right direction X is disposed in the gap 45. In this embodiment, a guiding portion 42a extending in the left-right direction X is provided at the front end 42f of the lower wall 42, and a guided portion 200a extending in the left-right direction X is further provided on the rear side of the door 200. The guiding portion 42a of the lower wall 42 does not necessarily have to be configured to guide the guided portion 200a of the door 200 in the left-right direction X.

[0021] A door stopper (not shown) is provided on the right surface of the left wall (not shown) of the housing 4. A door stopper (not shown) is provided on the left surface of the right wall (not shown) of the housing 4. The provision of the door stopper (not shown) can reduce the impact when the door comes into contact with the left wall (not shown) and the right wall (not shown) of the housing 4, but it is not necessary to provide it.

[0022] FIG. 4 is a cross-sectional view showing a cross section of the base plate portion 10 taken along a plane perpendicular to the left-right direction X at a location where the connecting plate 5 is provided.

[0023] The base plate 10 is stored inside the housing 4. The base plate 10 is fixed to the front surface of the rear wall 44 of the housing 4. The base plate 10 extends in the left-right direction X, and is provided from the left wall (not shown) of the housing 4 to the right wall (not shown) of the housing 4.

[0024] The base plate portion 10 has a first base plate 1, a second base plate 2, and a third base plate 3. In this embodiment, the first base plate 1 is provided on the left side, the second base plate 2 is provided to the right of the first base plate 1, and the third base plate 3 is provided further to the right of the second base plate 2. The first base plate 1, the second base plate 2, and the third base plate 3 only need to be arranged side by side in the left-right direction X, and the order in which they are arranged is not limited. The first base plate 1 supports a first section 61 of a rail portion 6, which will be described later, from below. The second base plate 2 supports a second section 62 of the rail portion 6, which will be described later, from below. The third base plate 3 supports a third section 63 of the rail portion 6, which will be described later, from below.

[0025] The first base plate 1 has a first bottom wall 11 and a first side wall 12. The first bottom wall 11 extends in the left-right direction X and the front-rear direction Y. The first side wall 12 stands upward from the rear end of the first bottom wall 11. A rear surface 12b of the first side wall 12 is fixed to a front surface 44f of a rear wall 44 of the housing 4. The first side wall 12 may be fixed to the rear wall 44 with bolts or by welding.

[0026] Fig. 5 is an enlarged view of the base plate portion 10 at D4 shown in Fig. 4. The first lower wall 11 has a first rail connection portion 13. The first rail connection portion 13 is provided at the front end of the upper surface 11u of the first lower wall 11. The first rail connection portion 13 has an upper surface 13u, a side surface 13s, and a recessed portion 13a.

[0027] The first rail connection portion 13 has two side surfaces 13s spaced apart in the front-rear direction Y. The side surfaces 13s of the first rail connection portion 13 extend upward from the upper surface 11u of the first lower wall 11. The side surfaces 13s of the first rail connection portion 13 extend in the left-right direction X, extending from the left end to the right end of the first lower wall 11. The upper surfaces 13u of the first rail connection portion 13 connect the upper ends of the side surfaces 13s and extend in the front-rear direction Y. The upper surfaces 13u of the first rail connection portion 13 extend in the left-right direction X, extending from the left end to the right end of the first lower wall 11. A recessed portion 13a is formed in the upper surface 13u of the first rail connection portion 13. The recessed portion 13a extends in the left-right direction X, extending from the left end to the right end of the first lower wall 11. The recessed portion 13a is connected to a base plate connection portion 66 of the rail portion 6, which will be described later, via the cushion material 7. Note that as long as the first rail connection portion 13 and the base plate connection portion 66 can be fitted together, the first rail connection portion 13 may have a convex portion instead of a recessed portion. Note that the first rail connection portion 13 and the base plate connection portion 66 have a fitting structure to ensure strength, but they do not have to have a fitting structure and may be fixed by, for example, bolts or welding.

[0028] The first side wall 12 has a first upper step 14 and a first lower step 15. The first upper step 14 is a step formed at the upper end of the front surface 12f of the first side wall 12. The first upper step 14 protrudes forward from the front surface 12f of the first side wall 12. The first upper step 14 extends in the left-right direction X and is formed from the left end to the right end of the first side wall 12. The first lower step 15 is a step formed on the front surface 12f of the first side wall 12 below the first upper step 14. The first upper step 14 and the first lower step 15 are spaced apart in the up-down direction. The first lower step 15 protrudes forward from the front surface 12f of the first side wall 12. The first lower step 15 extends in the left-right direction X and is formed from the left end to the right end of the first side wall 12. The length from the front surface 12f of the first side wall 12 to the front surface 14f of the first upper portion 14 is equal to the length from the front surface 12f of the first side wall 12 to the front surface 15f of the first lower portion 15.

[0029] The first upper step portion 14 has a first upper bolt groove 16. The first upper bolt groove 16 is a groove provided on the front surface 14f of the first upper step portion 14. The first upper bolt groove 16 extends in the left-right direction X and is formed from the left end to the right end of the first upper step portion 14. When viewed from the left-right direction X, the first upper bolt groove 16 is a T-shaped groove into which the head of a bolt can be fitted. The first upper bolt groove 16 is provided to make it easier to attach the bolt when fixing the connecting plate 5 to the first side wall 12 with the bolt. Note that the first upper bolt groove 16 does not necessarily have to be provided.

[0030] The first lower step portion 15 has a first lower bolt groove 17. The first lower bolt groove 17 is a groove provided on the front surface 15f of the first lower step portion 15. The first lower bolt groove 17 extends in the left-right direction X and is formed from the left end to the right end of the first lower step portion 15. When viewed from the left-right direction X, the first lower bolt groove 17 is a T-shaped groove into which the head of a bolt can be fitted. The first lower bolt groove 17 is provided to make it easier to install the bolt when fixing the connecting plate 5 to the first side wall 12 with the bolt. Note that the first lower bolt groove 17 does not necessarily have to be provided.

[0031] The second base plate 2 has a second lower wall 21 and a second side wall 22. The second lower wall 21 extends in the left-right direction X and the front-rear direction Y. The second side wall 22 stands upward from the rear end of the second lower wall 21. A rear surface 22b of the second side wall 22 is fixed to a front surface 44f of the rear wall 44 of the housing 4. The second side wall 22 may be fixed to the rear wall 44 with bolts or by welding.

[0032] The second lower wall 21 has a second rail connection portion 23. The second rail connection portion 23 is provided at the front end of the upper surface 21u of the second lower wall 21. The second rail connection portion 23 has an upper surface 23u, a side surface 23s, and a recessed portion 23a.

[0033] The second rail connection portion 23 has two side surfaces 23s spaced apart in the front-rear direction Y. The side surfaces 23s of the second rail connection portion 23 extend upward from the upper surface 21u of the second lower wall 21. The side surfaces 23s of the second rail connection portion 23 extend in the left-right direction X, extending from the left end to the right end of the second lower wall 21. The upper surfaces 23u of the second rail connection portion 23 connect the upper ends of the side surfaces 23s and extend in the front-rear direction Y. The upper surfaces 23u of the second rail connection portion 23 extend in the left-right direction X, extending from the left end to the right end of the second lower wall 21. A recessed portion 23a is formed in the upper surface 23u of the second rail connection portion 23. The recessed portion 23a extends in the left-right direction X, extending from the left end to the right end of the second lower wall 21. The recessed portion 23a is connected to a base plate connection portion 66 of the rail portion 6, which will be described later, via the cushion material 7. Note that as long as the second rail connection portion 23 and the base plate connection portion 66 can be fitted together, the second rail connection portion 23 may have a convex portion instead of a recessed portion. Note that the second rail connection portion 23 and the base plate connection portion 66 have a fitting structure to ensure strength, but they do not have to have a fitting structure and may be fixed by, for example, bolts or welding.

[0034] The second side wall 22 has a second upper step portion 24 and a second lower step portion 25. The second upper step portion 24 is a step formed at an upper end of the front surface 22f of the second side wall 22. The second upper step portion 24 protrudes forward from the front surface 22f of the second side wall 22. The second upper step portion 24 extends in the left-right direction X and is formed from the left end to the right end of the second side wall 22. The second lower step portion 25 is a step formed on the front surface 22f of the second side wall 22 below the second upper step portion 24. The second upper step portion 24 and the second lower step portion 25 are spaced apart in the up-down direction. The second lower step portion 25 protrudes forward from the front surface 22f of the second side wall 22. The second lower step portion 25 extends in the left-right direction X and is formed from the left end to the right end of the second side wall 22. The length from the front surface 22f of the second side wall 22 to the front surface 24f of the second upper portion 24 is equal to the length from the front surface 22f of the second side wall 22 to the front surface 25f of the second lower portion 25.

[0035] The second upper step portion 24 has a second upper bolt groove 26. The second upper bolt groove 26 is a groove provided on the front surface 24f of the second upper step portion 24. The second upper bolt groove 26 extends in the left-right direction X and is formed from the left end to the right end of the second upper step portion 24. When viewed from the left-right direction X, the second upper bolt groove 26 is a T-shaped groove into which the head of a bolt can be fitted. The second upper bolt groove 26 is provided to make it easier to attach the bolt when fixing the connecting plate 5 to the second side wall 22 with the bolt. Note that the second upper bolt groove 26 does not necessarily have to be provided.

[0036] The second lower step portion 25 has a second lower bolt groove 27. The second lower bolt groove 27 is a groove provided on the front surface 25f of the second lower step portion 25. The second lower bolt groove 27 extends in the left-right direction X and is formed from the left end to the right end of the second lower step portion 25. When viewed from the left-right direction X, the second lower bolt groove 27 is a T-shaped groove into which the head of a bolt can be fitted. The second lower bolt groove 27 is provided to make it easier to install the bolt when fixing the connecting plate 5 to the second side wall 22 with the bolt. Note that the second lower bolt groove 27 does not necessarily have to be provided.

[0037] The third base plate 3 has a third lower wall 31 and a third side wall 32. The third lower wall 31 extends in the left-right direction X and the front-rear direction Y. The third side wall 32 stands upward from the rear end of the third lower wall 31. A rear surface 32b of the third side wall 32 is fixed to a front surface 44f of a rear wall 44 of the housing 4. The third side wall 32 may be fixed to the rear wall 44 with bolts or by welding.

[0038] The third lower wall 31 has a third rail connection portion 33. The third rail connection portion 33 is provided at the front end of the upper surface 31u of the third lower wall 31. The third rail connection portion 33 has an upper surface 33u, a side surface 33s, and a recessed portion 33a.

[0039] The third rail connection portion 33 has two side surfaces 33s spaced apart in the front-rear direction Y. The side surfaces 33s of the third rail connection portion 33 extend upward from the upper surface 31u of the third lower wall 31. The side surfaces 33s of the third rail connection portion 33 extend in the left-right direction X, extending from the left end to the right end of the third lower wall 31. The upper surfaces 33u of the third rail connection portion 33 connect the upper ends of the side surfaces 33s and extend in the front-rear direction Y. The upper surfaces 33u of the third rail connection portion 33 extend in the left-right direction X, extending from the left end to the right end of the third lower wall 31. A recessed portion 33a is formed in the upper surface 33u of the third rail connection portion 33. The recessed portion 33a extends in the left-right direction X, extending from the left end to the right end of the third lower wall 31. The recessed portion 33a is connected to a base plate connection portion 66 of the rail portion 6, which will be described later, via the cushion material 7. Note that as long as the third rail connection portion 33 and the base plate connection portion 66 can be fitted together, the third rail connection portion 33 may have a convex portion instead of a recessed portion. Note that the third rail connection portion 33 and the base plate connection portion 66 have a fitting structure to ensure strength, but they do not have to have a fitting structure and may be fixed by, for example, bolts or welding.

[0040] The third side wall 32 has a third upper step 34 and a third lower step 35. The third upper step 34 is a step formed at an upper end of the front surface 32f of the third side wall 32. The third upper step 34 protrudes forward from the front surface 32f of the third side wall 32. The third upper step 34 extends in the left-right direction X and is formed from the left end to the right end of the third side wall 32. The third lower step 35 is a step formed on the front surface 32f of the third side wall 32 below the third upper step 34. The third upper step 34 and the third lower step 35 are spaced apart in the up-down direction. The third lower step 35 protrudes forward from the front surface 32f of the third side wall 32. The third lower step 35 extends in the left-right direction X and is formed from the left end to the right end of the third side wall 32. The length from the front surface 32f of the third side wall 32 to the front surface 34f of the third upper portion 34 is equal to the length from the front surface 32f of the third side wall 32 to the front surface 35f of the third lower portion 35.

[0041] The third upper step portion 34 has a third upper bolt groove 36. The third upper bolt groove 36 is a groove provided on the front surface 34f of the third upper step portion 34. The third upper bolt groove 36 extends in the left-right direction X and is formed from the left end to the right end of the third upper step portion 34. When viewed from the left-right direction X, the third upper bolt groove 36 is a T-shaped groove into which the head of a bolt can be fitted. The third upper bolt groove 36 is provided to make it easier to attach a bolt when fixing the connecting plate 5 to the third side wall 32 with the bolt. The third upper bolt groove 36 does not necessarily have to be provided.

[0042] The third lower step portion 35 has a third lower bolt groove 37. The third lower bolt groove 37 is a groove provided on the front surface 35f of the third lower step portion 35. The third lower bolt groove 37 extends in the left-right direction X and is formed from the left end to the right end of the third lower step portion 35. The third lower bolt groove 37 is a T-shaped groove when viewed from the left-right direction X, and can receive the head of a bolt. The third lower bolt groove 37 is provided to make it easier to attach a bolt when fixing the connecting plate 5 to the third side wall 32 with the bolt. The third lower bolt groove 37 does not necessarily have to be provided.

[0043] Fig. 6 is a front view showing the connecting plate 5. Fig. 7 is a cross-sectional view of the connecting plate 5 shown in Fig. 6 taken along line F6-F6.

[0044] The connecting plate 5 has a connecting plate main body 51, a reinforcing portion 52, bolt grooves 55, and a reinforcing plate 56. In this embodiment, two connecting plates 5 are provided. One of the two connecting plates 5 detachably connects the first base plate 1 and the second base plate 2, and the other detachably connects the second base plate 2 and the third base plate 3.

[0045] The connecting plate main body 51 is a plate-shaped member extending in the left-right direction X and the up-down direction. The length of the connecting plate main body 51 in the left-right direction X is greater than the length of the connecting plate main body 51 in the up-down direction. The connecting plate main body 51 is made of aluminum. Note that by making the connecting plate main body 51 from aluminum, the weight of the connecting plate 5 can be reduced, but it may also be made of, for example, a steel plate. The connecting plate main body 51 has a guide groove 5a and a notch 5b.

[0046] The guide grooves 5a are grooves formed on the front surface 51f of the connecting plate main body 51. The guide grooves 5a extend in the left-right direction X and are formed from the left end to the right end of the connecting plate main body 51. Five guide grooves 5a are provided spaced apart in the vertical direction. The guide grooves 5a are provided to make it easier to attach bolts when fixing the connecting plate 5 to the base plate 10 with the bolts, and there is no limit to the number of guide grooves that can be provided. Note that the guide grooves 5a do not necessarily have to be provided.

[0047] The notches 5b are formed at the upper and lower ends of the connecting plate main body 51. Four notches 5b are provided at the upper end of the connecting plate main body 51, spaced apart in the left-right direction X. Four notches 5b are provided at the lower end of the connecting plate main body 51, spaced apart in the left-right direction X. In this embodiment, eight notches 5b are provided. The notches 5b are provided to make it easier to attach bolts when fixing the connecting plate 5 to the base plate 10 with the bolts, and the number and positions of the notches 5b are not limited.

[0048] The reinforcing portion 52 has a first reinforcing portion 53 and a second reinforcing portion 54. The reinforcing portion 52 extends in the left-right direction X and protrudes in the front-rear direction Y from the surface of the connecting plate main body 51.

[0049] The first reinforcing portion 53 has an upper surface 53u, a lower surface 53d, and a side surface 53s. The upper surface 53u of the first reinforcing portion 53 extends rearward from the rear surface 51b of the connecting plate main body 51. The upper surface 53u of the first reinforcing portion 53 extends in the left-right direction X, and is formed from the left end to the right end of the connecting plate main body 51. The lower surface 53d of the first reinforcing portion 53 extends rearward from the rear surface 51b of the connecting plate main body 51, below the upper surface 53u. The lower surface 53d of the first reinforcing portion 53 extends in the left-right direction X, and is formed from the left end to the right end of the connecting plate main body 51. The side surface 53s of the first reinforcing portion 53 connects the rear ends of the upper surface 53u and the lower surface 53d, and extends in the up-down direction. The side surface 53s of the first reinforcing portion 53 extends in the left-right direction X, and is formed from the left end to the right end of the connecting plate main body portion 51.

[0050] The first reinforcing portion 53 has a reinforcing plate holding portion 52m that holds the reinforcing plate 56. The reinforcing plate holding portion 52m extends downward from the joint between the lower surface 53d and the side surface 53s of the first reinforcing portion 53. The reinforcing plate holding portion 52m extends in the left-right direction and is formed from the left end to the right end of the connecting plate main body 51.

[0051] The second reinforcing portion 54 extends rearward from the rear surface 51b of the connecting plate main body 51. The second reinforcing portion 54 is provided below the first reinforcing portion 53. The second reinforcing portion 54 extends in the left-right direction X, and is formed from the left end to the right end of the connecting plate main body 51.

[0052] The second reinforcing portion 54 has a reinforcing plate holding portion 52n that holds the reinforcing plate 56. The reinforcing plate holding portion 52n extends upward from the rear end of the second reinforcing portion 54. The reinforcing plate holding portion 52n extends in the left-right direction X and is formed from the left end to the right end of the connecting plate main body 51. The length from the rear surface 51b of the connecting plate main body 51 to the reinforcing plate holding portion 52n is equal to the length from the rear surface 51b of the connecting plate main body 51 to the reinforcing plate holding portion 52m.

[0053] The bolt groove 55 is a groove provided on the front surface 51f of the connecting plate main body 51. The bolt groove 55 extends in the left-right direction X and is formed from the left end to the right end of the connecting plate main body 51. When viewed from the left-right direction X, the bolt groove 55 is a T-shaped groove into which the head of a bolt can be fitted. The bolt groove 55 is formed in a space surrounded by the upper surface 53u, the lower surface 53d, and the side surface 53s of the first reinforcing part 53.

[0054] The reinforcing plate 56 is a plate-shaped member extending in the left-right direction X and the up-down direction. The length of the reinforcing plate 56 in the left-right direction X is equal to the length of the connecting plate main body 51 in the left-right direction X. The length of the reinforcing plate 56 in the up-down direction is slightly shorter than the length between the lower surface 53d of the first reinforcing portion 53 and the second reinforcing portion 54 in the up-down direction. The reinforcing plate 56 is disposed between the lower surface 53d of the first reinforcing portion 53 and the second reinforcing portion 54. Movement of the reinforcing plate 56 in the front-rear direction Y is restricted by the reinforcing plate holding portions 52m and 52n. The reinforcing plate 56 is made of stainless steel.

[0055] The rail portion 6 extends in the left-right direction X and supports the rollers 8 so that they can move freely. The rail portion 6 is connected to the first rail connection portion 13, the second rail connection portion 23, and the third rail connection portion 33 of the base plate portion 10 above via the cushion material 7. The rail portion 6 has a rail main body portion 65 and a base plate connection portion 66. The configuration of the rail portion 6 is not limited, as long as it supports the rollers 8 so that they can move freely from a first section 61 to at least a second section 62, which will be described later.

[0056] The rail main body 65 extends in the left-right direction X and has a first section 61 on the left side, a second section 62 to the right of the first section 61, and a third section 63 to the right of the second section 62. The rail main body 65 is rounded so as to protrude upward from an upper surface 65u, which prevents the rollers 8 from coming off the track.

[0057] The baseplate connection portion 66 is a convex member extending downward from the underside 65d of the rail main body portion 65. The baseplate connection portion 66 extends in the left-right direction X, from the left end to the right end of the rail main body portion 65. The baseplate connection portion 66 is fitted into the recessed portion 13a of the first rail connection portion 13, the recessed portion 23a of the second rail connection portion 23, and the recessed portion 33a of the third rail connection portion 33 via the cushion material 7. That is, the rail portion 6 is fitted into and attached to the first baseplate 1, the second baseplate 2, and the third baseplate 3. Note that as long as the baseplate portion 10 and the baseplate connection portion 66 are fittable with each other, the baseplate connection portion 66 may be formed in a concave shape instead of a convex shape. Note that the baseplate portion 10 and the baseplate connection portion 66 have a fitting structure to ensure strength, but they do not have to have a fitting structure and may be fixed by, for example, bolts, welding, or the like.

[0058] The cushioning material 7 is interposed between the first baseplate 1, the second baseplate 2, and the third baseplate 3 and the rail portion 6. The cushioning material 7 extends in the left-right direction X, extending from the left end to the right end of the baseplate portion 10. The cushioning material 7 is supported from below by the recessed portion 13a of the first rail connection portion 13, the recessed portion 23a of the second rail connection portion 23, and the recessed portion 33a of the third rail connection portion 33. The cushioning material 7 supports the baseplate connection portion 66 from below. The cushioning material 7 is a plate-shaped member made of an elastic material such as silicone rubber, ester-based polyurethane, ether-based polyurethane, natural rubber, chloroprene rubber, neoprene rubber, vinyl acetate, or butyl rubber. As shown in FIG. 5 , the cushioning material 7 is deformed to the cross-sectional shapes of the first rail connection portion 13, the second rail connection portion 23, and the third rail connection portion 33.

[0059] The roller 8 has a first roller 81 and a second roller 82. The first roller 81 is attached to the first door 210 via a bracket 9. The second roller 82 is attached to the second door 220 via a bracket 9. The roller 8 runs in the left-right direction X on the upper surface 65u of the rail portion 6. In this embodiment, the first roller 81 runs from the first section 61 to the second section 62 of the rail portion 6, and the second roller 82 runs from the second section 62 to the third section 63 of the rail portion 6. The configuration of the roller 8 is not limited as long as the first roller 81 can run from the first section 61 to at least the second section 62.

[0060] A driving member (not shown) is housed inside the housing 4. The driving device has, for example, a driving belt that moves the roller 8 in the left-right direction X, a motor that rotates the driving belt, etc. The driving member operates based on a signal from a control unit (not shown) that will be described later.

[0061] Object detection sensors (not shown) are provided on the front and rear surfaces of the upper frame of frame 300. When the object detection sensors detect an object, they send a signal to a control unit (not shown). The object detection sensors may be formed on either the front or rear surface of the upper frame, and the location where they are provided is not limited. Any medium for transmitting a signal to the control unit may be provided, and this may be, for example, a button, a remote control, or the like.

[0062] The control unit (not shown) is housed inside the housing 4. When the control unit receives a signal transmitted from an object detection sensor (not shown) upon detection of an object, it transmits a signal to the driving member to move the roller 8.

[0063] Next, the operation of the automatic door opening and closing device 100 will be described.

[0064] The housing 4 is attached to the front surface of the upper frame of the frame 300. The housing 4 is attached with the rear surface 44b in contact with the front surface of the upper frame of the frame 300. The housing 4 is fixed to the frame 300 with bolts. Note that bolts are used to fix the housing 4 because they allow for easy installation while ensuring strength, but the housing 4 may also be fixed by welding.

[0065] The base plate 10 is attached to the front surface 44f of the housing 4. The base plate 10 is attached with its rear surface in contact with the front surface 44f of the housing 4. The base plate 10 is fixed to the housing 4 with bolts. Note that bolts are used to fix the base plate 10 because they allow for easy attachment while ensuring strength, but they may also be fixed by welding.

[0066] When transporting, the base plate portion 10 is divided into a first base plate 1, a second base plate 2, and a third base plate 3. If the length of the base plate portion 10 in the left-right direction X is, for example, 4500 mm, the length of the first base plate 1, the second base plate 2, and the third base plate 3 in the left-right direction X can each be set to 1500 mm, thereby allowing the base plate portion 10 to be divided into three portions of 1500 mm each.

[0067] The connecting plate 5 detachably connects the first baseplate 1 and the second baseplate 2. The first baseplate 1 and the second baseplate 2 are connected with the first baseplate 1 positioned on the left side and the second baseplate 2 positioned on the right side. The connecting plate 5 is fixed with its rear surface 51b in contact with the front surface 12f of the first baseplate 1 and the front surface 22f of the second baseplate 2. The connecting plate 5 is fixed with bolts.

[0068] The connecting plate 5 detachably connects the second base plate 2 and the third base plate 3. The second base plate 2 and the third base plate 3 are connected with the second base plate 2 positioned on the left side and the third base plate 3 positioned on the right side. The connecting plate 5 is fixed with its rear surface 51b in contact with the front surface 22f of the second base plate 2 and the front surface 32f of the third base plate 3. The connecting plate 5 is fixed with bolts.

[0069] A first upper bolt groove 16 and a first lower bolt groove 17 are formed in the first base plate 1, so that the bolt can be fixed by fitting the head of the bolt into the first upper bolt groove 16 and the first lower bolt groove 17.

[0070] A second upper bolt groove 26 and a second lower bolt groove 27 are formed in the second base plate 2, so that the bolt can be fixed by fitting the head of the bolt into the second upper bolt groove 26 and the second lower bolt groove 27.

[0071] The third base plate 3 is formed with a third upper bolt groove 36 and a third lower bolt groove 37, so that the bolt can be fixed by fitting the head of the bolt into the third upper bolt groove 36 and the third lower bolt groove 37.

[0072] The connecting plate 5 has cutouts 5b formed therein, which allow bolts to be passed through the cutouts 5b to secure the connecting plate 5 to the base plate 10. In this embodiment, the connecting plate 5 is secured by bolts at eight locations. The number of locations secured by bolts is not limited, but it is preferable that the number of locations is eight or more.

[0073] The first base plate 1 supports the first section 61 of the rail portion 6 from below. The second base plate 2 supports the second section 62 of the rail portion 6 from below. The third base plate 3 supports the third section 63 of the rail portion 6 from below.

[0074] 8 is a front view showing a state in which the terminal block t is attached to the connection plate 5. FIG. 9 is a cross-sectional view of the connection plate 5 shown in FIG.

[0075] A terminal block t can be attached to the connection plate 5 using bolts fixed in the bolt grooves 55. The terminal block t extends in the left-right direction X. A power switch, a counter, etc. are arranged on the terminal block t. Because the bolt grooves 55 extend in the left-right direction X, the location where the bolts are fixed can be changed to suit the size of the terminal block t.

[0076] FIG. 10 is a front view showing the state in which the terminal block t is attached to the first base plate 1. As shown in FIG. Terminal block t can be attached to first base plate 1 via terminal block mounting plate b. Terminal block mounting plate b is attached to first base plate 1 using bolts fixed in first upper bolt groove 16 and first lower bolt groove 17. Terminal block t is attached to terminal block mounting plate b. Because bolt grooves 55 extend in the left-right direction X, the location where the bolts are fixed can be changed to suit the sizes of terminal block t and terminal block mounting plate b. Terminal block t can also be attached to second base plate 2 and third base plate 3 via terminal block mounting plate b. Note that connection plate 5 cut at a cross section perpendicular to the left-right direction X may be used instead of terminal block mounting plate b.

[0077] FIG. 11 is a front view showing the state in which the terminal block t is attached to the connection plate 5 and the second base plate 2. As shown in FIG. The terminal block t can be attached to both the connection plate 5 and the second base plate 2, so as shown in Figure 11, the left side can be attached to the connection plate 5 while the right side can be attached to the second base plate 2. Therefore, there are no restrictions on where the terminal block t can be placed.

[0078] The rail portion 6 is fitted and attached to the first base plate 1, the second base plate 2, and the third base plate 3 via cushioning material 7. The rail portion 6 is attached in a state in which the first base plate 1, the second base plate 2, and the third base plate 3 are connected.

[0079] The base plate connection portions 66 of the rail portion 6 are fitted with the first rail connection portions 13, the second rail connection portions 23, and the third rail connection portions 33 via the cushioning material 7. With the first base plate 1, the second base plate 2, and the third base plate 3 connected, cushioning material is placed over the first rail connection portions 13, the second rail connection portions 23, and the third rail connection portions 33 from above, and then the base plate connection portions 66 are attached to the first rail connection portions 13, the second rail connection portions 23, and the third rail connection portions 33 from above. Note that the rail portion 6 may be further fixed with bolts or the like to ensure strength.

[0080] The first roller 81 runs from the first section 61 to the second section 62 of the rail portion 6. The first roller 81 also runs on the boundary between the first section 61 and the second section 62. The boundary between the first section 61 and the second section 62 overlaps with the boundary between the first base plate 1 and the second base plate 2 in a plan view. In other words, the first roller 81 also runs on the portion of the rail portion 6 that overlaps with the boundary between the first base plate 1 and the second base plate 2 in a plan view.

[0081] The first door 210 is attached to the first roller 81 via a bracket 9, and as the first roller 81 moves in the left-right direction X, the first door 210 also moves in the left-right direction X. The first roller 81 runs on the section to the left of the center of the rail portion 6. Therefore, the first door 210 moves in the left-right direction X on the section to the left of the center of the automatic door opening and closing device 100. As the first door 210 moves in the left-right direction X, the opening and closing portion of the automatic door 500 to the left of the center opens and closes.

[0082] The second roller 82 runs from the second section 62 to the third section 63 of the rail portion 6. The second roller 82 also runs on the boundary between the second section 62 and the third section 63. The boundary between the second section 62 and the third section 63 overlaps the boundary between the second base plate 2 and the third base plate 3 in a plan view. In other words, the second roller 82 also runs on the portion of the rail portion 6 that overlaps the boundary between the second base plate 2 and the third base plate 3 in a plan view.

[0083] The second door 220 is attached to the second roller 82 via a bracket 9, and as the second roller 82 moves in the left-right direction X, the second door 220 also moves in the left-right direction X. The second roller 82 runs on the section to the right of the center of the rail portion 6. Therefore, the second door 220 moves in the left-right direction X on the section to the right of the center of the automatic door opening and closing device 100. As the second door 220 moves in the left-right direction X, the part of the entrance of the automatic door 500 to the right of the center opens and closes.

[0084] According to the automatic door opening and closing device 100 of this embodiment, the first roller 81 can travel from the first section 61 to the second section 62 of the rail portion 6, and also travels along the boundary between the first section 61 and the second section 62. Meanwhile, the base plate portion 10 can be separated into a first base plate 1 that supports the first section 61 and a second base plate 2 that supports the second section 62 from below. That is, the base plate portion 10 can be separated at the portion where the first roller 81 travels in a plan view. Therefore, the base plate portion 10 can be transported by separating it at the portion where the second roller 82 travels in a plan view.

[0085] The automatic door opening and closing device 100 of this embodiment is provided with a rail portion 6 that supports the first roller 81 so that it can run freely from the first section 61 to the second section 62. Therefore, even in the area where the base plate portion 10 is divided in plan view, the first roller 81 can run without generating large vibrations or noise.

[0086] According to the automatic door opening and closing device 100 of this embodiment, the second roller 82 can travel from the second section 62 to the third section 63 of the rail portion 6, and also travels along the boundary between the second section 62 and the third section 63. Meanwhile, the base plate portion 10 can be separated into a second base plate 2 that supports the second section 62 and a third base plate 3 that supports the third section 63 from below. That is, the base plate portion 10 can be separated at the portion where the second roller 82 travels in a plan view. Therefore, the base plate portion 10 can be transported separated at the portion where the second roller 82 travels in a plan view.

[0087] The automatic door opening and closing device 100 of this embodiment is provided with a rail portion 6 that supports the second roller 82 so that it can run freely from the second section 62 to the third section 63. Therefore, even in the area where the base plate portion 10 is divided in plan view, the second roller 82 can run without generating large vibrations or noise.

[0088] The automatic door opening and closing device 100 of this embodiment is provided with a connecting plate 5 that detachably connects the first base plate 1 and the second base plate 2. Therefore, the automatic door opening and closing device 100 can be transported by separating the base plate part 10 into the first base plate 1 and the second base plate 2 while ensuring the strength when fixed to the frame 300.

[0089] The automatic door opening and closing device 100 of this embodiment is provided with a connecting plate 5 that detachably connects the second base plate 2 and the third base plate 3. Therefore, the automatic door opening and closing device 100 can be transported by separating the base plate part 10 into the second base plate 2 and the third base plate 3 while ensuring the strength when fixed to the frame 300.

[0090] According to the automatic door opening and closing device 100 of this embodiment, the connecting plate 5 has reinforcing portions 52, which improves the strength of the connecting plate 5. Therefore, sufficient strength can be ensured even if the connecting plate 5 is made lighter. If the connecting plate 5 can be made lighter, it can be made larger in the left-right direction X without putting strain on the bolts, and the area in which the connecting plate 5 contacts the base plate portion 10 can be increased. If the area in which the connecting plate 5 contacts the base plate portion 10 can be increased, the number of points that can be fixed with bolts can be increased, allowing the base plate to be connected more firmly.

[0091] According to the automatic door opening and closing device 100 of this embodiment, the connecting plate 5 has the reinforcing plate 56, which improves the strength of the connecting plate 5. Therefore, even if the connecting plate main body 51 is made lighter, sufficient strength can be ensured.

[0092] According to the automatic door opening and closing device 100 of this embodiment, the rail portion 6 is attached by fitting to the base plate portion 10. The rail portion 6 and the base plate portion 10 are configured to fit together in the vertical direction, and the connecting portions of the base plate portion 10 are configured to be resilient to forces applied in the front-to-rear direction Y. The connecting portions of the base plate portion 10 refer to the connecting portions between the first base plate 1 and the second base plate 2 and the connecting portions between the second base plate 2 and the third base plate 3. This allows the first base plate 1, the second base plate 2, and the third base plate 3 to be connected more firmly.

[0093] According to the automatic door opening and closing device 100 of this embodiment, the connecting plate 5 has bolt grooves 55, which allows bolts to be easily fixed. Since components can be fixed to the connecting plate 5 with bolts, for example, the terminal block t, a wire stopper, etc. can be easily attached to the connecting plate 5. Therefore, even if the internal space of the housing 4 is narrow, space can be secured to attach the terminal block t, a wire stopper, etc.

[0094] The automatic door opening and closing device 100 of this embodiment has cushioning material 7 interposed between the base plate portion 10 and the rail portion 6. Therefore, even in the area where the base plate portion 10 is divided in plan view, the rollers 8 can run without generating large vibrations or noise.

[0095] In the automatic door opening and closing device 100 of this embodiment, the connecting plate main body 51 is made of aluminum, and the reinforcing plate 56 is made of stainless steel. Therefore, the connecting plate 5 can be made lighter while maintaining its strength through the reinforcing plate 56.

[0096] (Variation 1) Next, a modified example of the automatic door opening and closing device 100 will be described. Fig. 12 is a front view showing connecting plate 5B, which is a modified example of connecting plate 5 of automatic door opening and closing device 100. Connecting plate 5B does not have cutout portion 5b as shown in Fig. 12. Connecting plate 5B differs from connecting plate 5 in that it does not have cutout portion 5b.

[0097] Because automatic doors vary in size and shape depending on the building in which they are installed, the size and shape of the automatic door opening and closing device 100 attached to the automatic door may also change. If the size or shape of the base plate 10 changes, the location where the bolt is fixed to the connecting plate 5 may also change, and if the notch 5b is formed, it may be difficult to fix the bolt. In the case of a configuration without the notch 5b, such as connecting plate 5B, the location where the bolt is fixed to connecting plate 5B is not limited. If the location where the bolt is fixed is not uniform, it is effective to use connecting plate 5B.

[0098] (Variation 2) 13 is a front view showing automatic door 500B, a modified version of automatic door 500. Automatic door 500B is equipped with automatic door opening and closing device 100B, a modified version of automatic door opening and closing device 100. Automatic door opening and closing device 100B differs from automatic door opening and closing device 100 in that it does not have a third base plate 3, but has only one connecting plate 5.

[0099] The automatic door opening and closing device 100B has a base plate portion 10B instead of the base plate portion 10. The base plate portion 10B has a first base plate 1 and a second base plate 2, but does not have a third base plate 3. The first roller 81 runs on a section of the rail portion 6 that overlaps with the first base plate 1 in a plan view. The second roller 82 runs on a section of the rail portion 6 that overlaps with the second base plate 2 in a plan view.

[0100] In the automatic door opening and closing device 100B, the base plate 10B can be divided into two parts: a first base plate 1 and a second base plate 2. Compared to automatic door opening and closing devices in which the base plate 10B is divided into three parts, the strength of the automatic door opening and closing device 100B is improved when fixed to the frame 300. For this reason, if the size of the base plate does not pose a problem when transporting it, it is preferable to provide the base plate 10B.

[0101] In the second modification, the first roller 81 travels only in the first section 61 of the rail portion 6, and the second roller 82 travels only in the second section 62 of the rail portion 6. Depending on the circumstances, the rail portion 6 can also be used in a configuration in which the rollers 8 do not travel from the first section 61 to the second section 62.

[0102] Although a modification of the base plate unit 10 has been described in Modification 2, the configuration of the base plate unit 10 is not limited thereto. The base plate unit 10 may have a configuration in which, for example, the first base plate 1 has two base plates, and the two base plates are detachably connected by a connecting plate 5. In this case, the first base plate 1 can be divided into two by removing the connecting plate 5. The base plate unit 10 may also have a configuration in which the second base plate 2 has two base plates, and the two base plates are detachably connected by the connecting plate 5. In this case, the second base plate 2 can be divided into two by removing the connecting plate 5. Because the base plate unit 10 can be divided into smaller pieces as needed, transportation of the base plate unit 10 becomes easier, and the use of charter flights can be reduced, for example.

[0103] Furthermore, the size of the first base plate 1, the second base plate 2, and the third base plate 3 in the left-right direction X is not limited. Therefore, even if the standard size of the base plates to be prepared is limited, they can be cut to the required size and combined for use. For example, if a standard size 1200 mm base plate is prepared, one 1200 mm base plate and one base plate cut to 1000 mm can be combined to form a 2200 mm base plate. Furthermore, the 200 mm base plate cut off when the 1200 mm base plate is cut to 1000 mm can be combined with another base plate and reused, thereby reducing the amount of material discarded.

[0104] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0105] 100...automatic door opening and closing device, 10...base plate portion, 1...first base plate, 2...second base plate, 3...third base plate, 4...casing, 5...connecting plate, 6...rail portion, 7...cushion material, 8...roller, 11...first lower wall, 12...first side wall, 13...first rail connection portion, 14...first upper portion, 15...first lower portion, 16...first upper bolt groove, 17...first lower bolt groove, 21...second lower wall, 22...second side wall, 23...second rail connection portion, 24...second upper portion, 25...second lower portion, 26...second upper bolt groove, 27...second lower bolt groove, 31...third lower wall, 32...third side wall, 33...third rail connection portion, 34...third Three upper stages, 35...third lower stage, 36...third upper bolt groove, 37...third lower bolt groove, 13a, 23a, 33a...recessed portion, 51...connecting plate main body, 52...reinforcement portion, 52m, 52n...reinforcement plate holding portion, 53...first reinforcing portion, 54...second reinforcing portion, 55...bolt groove, 56...reinforcement plate, 61...first section, 62...second section, 63...third section, 65...rail main body, 66...base plate connection portion, 81...first roller, 82...second roller, 500...automatic door, 100...automatic door opening / closing device, 200...door, 300...frame, 210...first door, 220...second door, X...left-right direction, Y...front-back direction

Claims

1. a rail portion extending in the left-right direction and having a first section on the left side and a second section on the right side of the first section, and supporting a roller attached to the door so that the roller can move freely from the first section to at least the second section; a first base plate that supports the first section of the rail portion from below; a second base plate that supports the second section of the rail portion from below; a connecting plate that detachably connects the first base plate and the second base plate; Equipped with Automatic door opening and closing device.

2. The door includes a first door and a second door provided separately from the first door, The rollers include a first roller attached to the first door and a second roller attached to the second door, The first roller travels from the first section to at least the second section. The automatic door opening and closing device according to claim 1.

3. The connecting plate has a plate-shaped connecting plate main body portion and a reinforcing portion extending in the left-right direction and protruding from a surface of the connecting plate main body portion in a front-rear direction intersecting the left-right direction.

3. The automatic door opening and closing device according to claim 1 or 2.

4. The connection plate includes a plate-shaped connection plate main body and The connecting plate has a reinforcing plate extending in the left-right direction.

3. The automatic door opening and closing device according to claim 1 or 2.

5. The rail portion is fitted and attached to the first base plate and the second base plate.

3. The automatic door opening and closing device according to claim 1 or 2.

6. a third base plate that supports a third section of the rail portion to the right of the second section from below and is detachably connected to the second base plate by the connecting plate; 3. The automatic door opening and closing device according to claim 1 or 2.

7. The connecting plate has a bolt groove into which the head of a bolt is fitted.

3. The automatic door opening and closing device according to claim 1 or 2.

8. Cushioning materials extending in the left-right direction are interposed between the rail portions and the first base plate and between the rail portions and the second base plate.

3. The automatic door opening and closing device according to claim 1 or 2.

9. the connecting plate body is made of aluminum, The reinforcing plate is made of stainless steel.

5. The automatic door opening and closing device according to claim 4.

Images