Electric shutter

Abstract

To provide an electric shutter capable of preventing a drive gear from falling off from a rack gear.SOLUTION: The electric shutter is an electric shutter includes: a rack gear 27 that is placed on both sides of a building opening in the width direction; a shutter curtain that is provided to the opening so as to be opened / closed; a baseboard 30 that is provided at the bottom of the shutter curtain with an electric motor attached; a drive gear 44 that is provided to an output shaft 42 of the electric motor being meshed with the rack gear 27. The width of the rack gear 27 is larger than the width of the drive gear 44, and a meshing position A2 between the rack gear 27 and the drive gear 44 is within the length of the rack gear 27 in the width direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a motorized shutter. [Background technology]

[0002] Conventionally, buildings may be equipped with a shutter device that includes a shutter curtain in which multiple slats are rotatably connected to one another in the vertical direction, a shaft that winds up the shutter curtain, and a drive mechanism. The drive mechanism includes a guide rail fixed to the wall of the building, a rack gear attached to the guide rail, a motor attached to the lower part of the shutter curtain, and a drive gear attached to the output shaft of the motor. A configuration has been proposed in which the drive gear meshes with the rack gear and is guided in the vertical direction by the rack gear (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-152974 Summary of the Invention [Problem to be solved by the invention]

[0004] Due to dimensional errors in the fixed position of the guide rail, the drive gear attached to the shutter curtain may come off the rack gear, causing the electric shutter to stop moving or to become less operable.

[0005] The present disclosure has been made in consideration of the above circumstances, and provides an electric shutter that can prevent a drive gear from falling off a rack gear. [Means for solving the problem]

[0006] An electric shutter according to one aspect of the present disclosure includes rack gears provided on both sides of an opening in a building in the width direction, a shutter curtain provided in the opening so as to be able to open and close, a baseboard provided below the shutter curtain and having an electric motor attached thereto, and a drive gear provided on the output shaft of the electric motor and meshing with the rack gears, guide rails attached to both sides of the opening in the width direction; An electric shutter equipped with ,before The meshing position between the rack gear and the drive gear is within the range of the length in the width direction of the rack gear. The meshing position of the rack gear is located closer to the outer side in the width direction than the center in the width direction, and the length of the part of the rack gear that is on the inner side in the width direction from the meshing position is longer than the length of the part of the rack gear that is on the outer side in the width direction from the meshing position. . [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of an electric shutter according to an embodiment, viewed from the outdoor side. [Figure 2] FIG. 2 is a horizontal cross-sectional view of an end portion in the width direction of the electric shutter according to the embodiment. [Figure 3] Enlarged view of part A in Figure 2. [Figure 4] FIG. 10 is a diagram showing a case where the baseboard is shifted to one side in the width direction, that is, to the left side of the paper. [Figure 5] FIG. 10 is a diagram showing a case where the baseboard is shifted to the other side in the width direction, that is, to the right side of the paper. DETAILED DESCRIPTION OF THE INVENTION

[0008] An electric shutter according to one embodiment will be described below with reference to the drawings. The electric shutter 100 shown in Fig. 1 is installed on the outdoor side of an opening in a building. The electric shutter 100 is an existing manual shutter that has been converted into an electric shutter by replacing some of its parts.

[0009] When the electric shutter 100 is viewed from the front, the left-right direction along the horizontal direction is referred to as the width direction. The width direction direction toward the center of the building opening is referred to as the inner width direction. The width direction direction from the center of the building opening toward the edge is referred to as the outer width direction. The horizontal direction connecting the indoor side and outdoor side is referred to as the indoor-outdoor direction.

[0010] An existing manual shutter will now be described. The existing manual shutter comprises a frame body 11, a shutter case 12, a shutter curtain 13, a guide rail (not shown), and a baseboard (not shown). The frame body 11, the shutter case 12, and the shutter curtain 13 are also used in the electric shutter 100, and will be described based on Figure 1.

[0011] The frame body 11 has a four-sided frame shape. The frame body 11 is fixed to an opening in the building. The shutter case 12 is fixed to the top plate 11a of the frame body 11. The shutter case 12 is box-shaped. The shutter curtain 13 is installed in the opening of the building so that it can be opened and closed. The shutter curtain 13 has a plurality of slats 13a. The plurality of slats 13a are adjacent to each other in the vertical direction and connected to each other. Between adjacent slats 13a there is an axis (not shown) whose axis is in the width direction. The slats 13a are rotatable around the axis. A shaft (not shown) is rotatably attached inside the shutter case 12. The upper part of the shutter curtain 13 is connected to the shaft. The shutter curtain 13 can be rolled up and out by rotating the shaft.

[0012] The guide rails of the existing manual shutter are installed on both sides of the building opening in the width direction. The baseboard is installed at the bottom of the shutter curtain 13. The guide rails guide the ends of the baseboard in the width direction in the vertical direction.

[0013] The electric shutter 100 is a manual shutter with the guide rails and baseboard removed and a new guide rail 20 and new baseboard 30 installed. The electric shutter 100 comprises a frame 11, a shutter case 12, a shutter curtain 13, a new guide rail 20, a new baseboard 30, and a drive unit 40. The frame 11, shutter case 12, and shutter curtain 13 are the same as the existing components, so a description of them will be omitted. The new guide rail 20 corresponds to the guide rail in the claims. The new baseboard 30 corresponds to the baseboard in the claims.

[0014] The new guide rails 20 are provided on both sides of the opening in the building in the width direction. The new guide rails 20 are attached to the outdoor side of the vertical frame 11b of the frame body 11. The new guide rails 20 are provided over approximately the entire length of the vertical frame 11b.

[0015] As shown in FIG. 2, the new guide rail 20 has a base portion 21, an outdoor side plate portion 22, and an indoor side plate portion .

[0016] As shown in FIG. 3, the base 21 has a locking plate portion 21a, a mounting plate portion 21b, a bent plate portion 21c, an indoor side plate portion 21e, and a pair of inward plate portions 21d, 21d.

[0017] The locking plate portion 21a is arranged along the indoor-outdoor direction. The indoor end of the locking plate portion 21a is locked to the vertical frame 11b. The mounting plate portion 21b is arranged along the indoor-outdoor direction. The mounting plate portion 21b is arranged more inward in the width direction than the locking plate portion 21a. The indoor end of the mounting plate portion 21b is fixed to the vertical frame 11b. The bent plate portion 21c extends inward in the width direction from the outdoor end of the locking plate portion 21a. The indoor side plate portion 21e is arranged opposite the bent plate portion 21c on the indoor side of the bent plate portion 21c. One inward plate portion 21d extends indoors from the bent plate portion 21c. The other inward plate portion 21d extends outdoor from the indoor side plate portion 21e.

[0018] The outdoor-side plate portion 22 extends on an extension of the inner side of the bent plate portion 21c in the width direction. The indoor-side plate portion 23 extends inward in the width direction from the outdoor-side end of the mounting plate portion 21b. The indoor-side plate portion 23 may extend inward in the width direction from the indoor-side plate portion 21e.

[0019] A pair of extending pieces 22a, 22a extending toward the indoor side is provided at the tip of the outdoor side panel 22. The pair of extending pieces 22a, 22a are arranged opposite each other in the width direction. A locking piece 22b is provided at the tip of each extending piece 22a, extending toward the opposing extending piece 22a. The mohair 24 is arranged within the pair of extending pieces 22a, 22a, and is locked by the pair of locking pieces 22b, 22b.

[0020] A pair of extending pieces 23a, 23a extending toward the outdoor side is provided at the tip of the indoor side panel 23. The pair of extending pieces 23a, 23a are arranged opposite each other in the width direction. A locking piece 23b is provided at the tip of each extending piece 23a, extending toward the opposing extending piece 23a. The mohair 24 is arranged within the pair of extending pieces 23a, 23a and is locked by the pair of locking pieces 23b, 23b.

[0021] A locking projection 25 that projects inward in the width direction is provided at the inner end of the indoor side panel portion 21e in the width direction. Of the pair of extension pieces 23a, 23a, the extension piece 23a that is located on the outer side in the width direction is provided with a locking projection 26 that projects outward in the width direction. A rack gear 27 is provided on the indoor side panel portion 23. Both ends of the rack gear 27 in the width direction are locked by the locking projections 25, 26. The rack gear 27 extends in the vertical direction. The rack gear 27 is a linear gear.

[0022] 1, the new baseboard 30 is attached to the lower part of the shutter curtain 13. The new baseboard 30 is provided over substantially the entire length of the lower part of the shutter curtain 13 in the width direction.

[0023] The drive unit 40 has an electric motor 41, an output shaft 42, and a drive gear 44 (see FIG. 2). The electric motor 41 is attached to the indoor side of the new baseboard 30. The output shaft 42 extends in the width direction from the electric motor 41. As shown in FIG. 3, a drive gear support portion 43 is provided on the outer peripheral surface of the output shaft 42. A drive gear 44 is provided on the outer peripheral surface of the drive gear support portion 43 on the outside in the width direction. The drive gear 44 meshes with the rack gear 27.

[0024] The widthwise length W21 of the rack gear 27 is longer than the widthwise length W22 of the drive gear 44. In the rack gear 27, the meshing position A2 where the rack gear 27 meshes with the drive gear 44 is closer to the outer side in the widthwise direction than the center in the widthwise direction of the rack gear 27. The widthwise length of the meshing position A2 is defined as length W2.

[0025] The clearance between the widthwise inner end 20a of the new guide rail 20 and the widthwise outer end 30a of the new baseboard 30 is defined as length W11. A length W11 is secured on each side of the widthwise direction of the new baseboard 30. The distance between the new guide rails 20 is defined as the shutter opening length W12. Length W12 is the distance between the widthwise inner ends of a pair of new guide rails 20, 20. Length W12 is determined by the distance between a pair of existing vertical frames 11b. The error in the shutter opening is determined by the error in the distance between the vertical frames 11b, and is defined as W13 (not shown).

[0026] In the rack gear 27, the portion that is inside the meshing position A2 in the width direction is referred to as the inner portion A1. The length of the inner portion A1 in the width direction is referred to as the length W1. The length W1 ensures an allowance for the mounting dimensional error of the electric shutter 100. The length W1 of the inner portion A1 is longer than the sum of the lengths W11 and W13.

[0027] In the rack gear 27, a portion that is outward in the width direction from the meshing position A2 is defined as an outer portion A3. The length of the outer portion A3 in the width direction is defined as a length W3. The length W3 is longer than the length W11. The length W3 is shorter than the length W1.

[0028] Even if the meshing position A2 shifts inward in the width direction, it remains within the range of the width length of the rack gear 27 and within the range of the inner portion A1. Even if the meshing position A2 shifts outward in the width direction, it remains within the range of the width length of the rack gear 27 and within the range of the outer portion A3. The width length of the rack gear 27 is a length that takes into account dimensional errors of the new baseboard 30, dimensional errors of the frame body 11, the effects of construction variations in the frame body 11 (error in the L direction due to the frame angle), and cutting errors.

[0029] In the following description, one side in the width direction is the left side of the paper in FIGS. 2 to 5, and the other side in the width direction is the right side of the paper in FIGS. As shown in FIG. 4, the new baseboard 30 may shift to the left side of the paper, resulting in a zero clearance between the left end 20a of the new guide rail 20 and the left end 30a of the new baseboard 30. In the normal state shown in FIG. 3, the length W3 (see FIG. 3) of the outer portion A3 of the rack gear 27 is longer than the clearance W11 (see FIG. 3) between the end 20a of the new guide rail 20 and the end 30a of the new baseboard 30. Therefore, even if the new baseboard 30 shifts to the left side of the paper, as shown in FIG. 4, the drive gear 44 does not fall off to the outside in the width direction of the rack gear 27. In this specification, "falling off to the outside in the width direction" refers to a state in which the drive gear 44 moves closer to the new guide rail 20 than the rack gear 27, and the meshing between the drive gear 44 and the rack gear 27 is released.

[0030] As shown in FIG. 5, the new baseboard 30 may shift to the right side of the paper, resulting in a zero clearance between the right end of the new guide rail 20 and the right end of the new baseboard 30 (not shown). The length of the clearance W11' between the left end 20a of the new guide rail 20 and the left end 30a of the new baseboard 30 is calculated as follows: original clearance W11 + right-side clearance W11 + shutter opening error + dimensional error of the new baseboard 30. Therefore, even if the new baseboard 30 shifts to the right side of the paper, the drive gear 44 does not fall off to the inside in the width direction of the rack gear 27. In this specification, "falling off to the inside in the width direction" refers to a state in which the drive gear 44 moves closer to the mohair 24 than the rack gear 27, causing the drive gear 44 and rack gear 27 to lose their meshing state.

[0031] In the electric shutter 100, the length W1 of the inner portion A1 includes an error in the shutter opening, which is the distance between the newly installed guide rails 20 on both sides in the width direction. Even if the length W12 of the shutter opening fluctuates within the error range and the drive gear 44 is positioned shifted inward in the width direction, it is possible to prevent the drive gear 44 from falling off from the inside of the rack gear 27 in the width direction.

[0032] The meshing position A2 of the rack gear 27 is disposed closer to the outer side in the width direction than the center in the width direction of the rack gear 27. This allows the length W1 of the inner portion A1 in the width direction of the rack gear 27 to be secured large, and prevents the drive gear 44 from falling off from the inner side in the width direction of the rack gear 27.

[0033] The length W3 of the outer portion A3 of the rack gear 27 is longer than the length W11 of the clearance between the end 20a of the newly installed guide rail 20 and the end 30a of the newly installed baseboard 30. Even if the drive gear 44 is installed shifted outward in the width direction, the drive gear 44 can be prevented from falling off from the outside of the rack gear 27 in the width direction.

[0034] The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., within the scope of the present disclosure.

[0035] For example, in the embodiment described above, the meshing position A2 is located closer to the edge of the opening than the widthwise center of the rack gear 27, but this is not limited to this. As long as the length W1 of the inner portion A1 ensures an installation dimensional error of the electric shutter 100, the meshing position A2 may be located in the widthwise center of the rack gear 27, and the position can be set appropriately.

[0036] The electric shutter 100 shown above is an existing manual shutter that has been retrofitted with an electric shutter by replacing the guide rails and baseboards, but this is not limited to this. The electric shutter 100 may also be installed as a new shutter. [Explanation of symbols]

[0037] 13 shutter curtain, 20 guide rail, new guide rail, 30 baseboard, new baseboard, 41 electric motor, 42 output shaft, 44 drive gear, 100 electric shutter, A1 inner part, A2 meshing position, W1 length of inner part, W21 width direction length of rack gear, W22 width direction length of drive gear

Claims

1. Rack gears provided on both sides of the building opening in the width direction; a shutter curtain provided in the opening so as to be able to open and close; a baseboard provided at the bottom of the shutter curtain and having an electric motor attached thereto; a drive gear provided on an output shaft of the electric motor and meshing with the rack gear; and guide rails attached to both sides of the opening in the width direction, the meshing position between the rack gear and the drive gear is within a range of the length of the rack gear in the width direction, The meshing position of the rack gear is disposed closer to the outer side in the width direction than the center in the width direction, The length of the rack gear on the inner side in the width direction from the meshing position is longer than the length of the rack gear on the outer side in the width direction from the meshing position.

2. An electric shutter as described in claim 1, wherein the length of the portion of the rack gear that is widthwise inward of the meshing position is longer than the error in the shutter opening.

3. An electric shutter as described in claim 1 or 2, wherein the length of the portion of the rack gear that is widthwise inward of the meshing position is longer than the sum of the clearance between the widthwise inner end of the guide rail and the widthwise outer end of the baseboard and the error in the shutter opening.

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