Shutter opening and closing mechanism mounting structure

Abstract

To improve the durability of the mounting structure of a shutter opening / closing device with a built-in swingable winding drum.SOLUTION: An opening / closing device 6 is built into one end side of a winding drum 30 via a mounting base 7. The mounting base 7 includes a cylindrical portion 70. A shaft portion 60 of the opening / closing device 6 is fixed to a connecting portion 31 fixed to the inner peripheral surface of the winding drum 30. The opening / closing device 6 is positioned in the cylindrical portion 70 and is supported swingably at one end side. A plate-like portion 8 is provided at the other end side of the cylindrical portion 70. The plate-like portion 8 is positioned outside the end portion of the winding drum 30. The plate-like portion 8 is fixed to a fixed portion 9 while being in surface contact therewith. The plate-like portion 8 has a shape in which the stress generated between the plate-like portion and a fixation part of the fixed portion is dispersed as compared with the case where the plate-like portion is rectangular.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a mounting structure for a shutter opening and closing mechanism. [Background technology]

[0002] There are two types of shutter opening and closing devices: a built-in type that is installed inside the shutter curtain roll, and an external type that is installed outside the shutter curtain roll. Built-in shutter opening and closing devices are described in the background art sections of Patent Documents 1 and 2, for example.

[0003] Fig. 10 shows the mounting structure of a conventional built-in shutter opening / closing device. An opening / closing device 6' is provided inside the drive side end of the winding drum 30', and the opening / closing device 6' is installed via a cylindrical mounting base 7'. The base end of the mounting base 7' is connected to a side case 8', and the mounting base 7' and the side case 8' form a drive side bracket. The opening / closing device 6' is inserted into the cylindrical mounting base 7', and the shaft of the opening / closing device 6' protrudes beyond the tip of the mounting base 7' and is connected to a connecting part 31' that rotates integrally with the winding drum 30'.

[0004] In the built-in mounting structure, the rotational force of the shaft of the opening / closing device 6' is directly transmitted to the hoist drum 30', so that the opening / closing device 6' is supported so as to be able to swing or rotate slightly up and down relative to the mounting base 7' in order to release excessive force that may occur when the rotational force is transmitted. The opening / closing device 6' mounted so as to be able to swing to the mounting base 7' is described in the background art columns of Patent Documents 1 and 2.

[0005] When the shutter curtain is raised or lowered, the opening / closing device 6' repeatedly swings up and down, which generates stress in the drive bracket (the mounting base 7' and the side case 8') that supports the opening / closing device 6' to be able to swing. At this time, if the drive bracket and the driven bracket that support both ends of the length of the hoisting drum 30' are supported on the upper ends of the left and right guide rails, the drive bracket is not fixed to the frame or other members, so the stress generated in the mounting base 7' and the side case 8', for example, is dissipated as vibration of the mounting base 7' and the side case 8'.

[0006] However, when the shutter device is incorporated into another device (for example, an air curtain), the drive side bracket consisting of the mounting base 7' and the side case 8' cannot be used as is, and the drive side bracket supporting the opening / closing mechanism 6' needs to be fixed to a part of the other device. However, stress generated in the drive side bracket as the opening / closing mechanism 6' swings may act on the fixed part, which may affect the durability of the mounting structure of the shutter opening / closing mechanism. [Patent Document 1] Patent Publication No. 2000-64749 [Patent Document 2] Patent Publication 2010-174529 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a mounting structure for a shutter opening / closing device with a built-in swingable hoist drum, which has improved durability. [Means for solving the problem]

[0008] The technical means adopted in the present invention are: An opening / closing mechanism is built into one end of the winding drum via a mounting base. The mounting base includes a cylindrical portion in which the opening and closing mechanism is housed, and a shaft portion of the opening and closing mechanism protrudes from one end side of the cylindrical portion and is fixed to a connecting portion fixed to an inner peripheral surface of the hoist body, and the opening and closing mechanism is located within the cylindrical portion and is supported on the one end side of the cylindrical portion so as to be able to swing. a plate-shaped portion is provided on the other end side of the cylindrical portion, and the plate-shaped portion is located outside the end of the winding drum, The plate-shaped portion is fixed in a state of contact with a fixed portion, The plate-like portion has a shape that disperses stress generated at a fixing portion between the plate-like portion and the fixed portion, compared to a case where the plate-like portion is rectangular. A mounting structure for a shutter opening / closing mechanism.

[0009] If the plate-shaped portion of the mounting base of the opening / closing device were square, the plate-shaped portion would have four sides with four interior angles of approximately 90°, and there is a risk of stress being concentrated at the points where the corners of the plate-shaped portion (even if they are rounded) come into contact with the fixed portion. In the present invention, some or all of the corners of the plate-like portion are removed to create a curved surface, or the number of sides of the polygon is increased and the interior angles of some or all of the corners are made larger (for example, 120° or more), thereby obtaining a shape in which the stress generated in the fixed portion between the plate-like portion and the fixed portion is dispersed more than if it were square.

[0010] In one embodiment, at least half of the plate-like portion is substantially semicircular. That is, an opening / closing mechanism is built into one end of the winding drum via a mounting base, the mounting base includes a cylindrical portion in which the opening and closing mechanism is housed, a shaft portion of the opening and closing mechanism protrudes from one end side of the cylindrical portion and is fixed to a core fixed to an inner peripheral surface of the hoisting drum, and the other end side of the cylindrical portion includes a plate-shaped portion; The opening and closing mechanism is located within the cylindrical portion and is supported swingably on one end side of the cylindrical portion, The other end side of the cylindrical portion and the plate-like portion are located outside the end portion of the winding drum, The plate-shaped portion is fixed to a fixed portion in a surface-contact state, At least half of the plate-shaped portion is substantially semicircular. A mounting structure for a shutter opening / closing mechanism. In one embodiment, the plate-shaped portion has an upper half that is substantially semicircular and a lower half that is substantially rectangular. In one embodiment, the plate-shaped portion is a disk-shaped portion having a substantially circular periphery.

[0011] In one embodiment, the plate-shaped portion has at least six sides and six corners, with at least four corners having interior angles of 120° or greater and all interior angles being 90° or greater. Effect of the Invention

[0012] In the mounting structure of the present invention, the mounting base that supports the opening / closing mechanism built into the winding drum in a swingable manner is formed from a cylindrical portion and a plate-shaped portion, and the plate-shaped portion is fixed in abutting contact with the fixed portion.In this case, the plate-shaped portion has a shape that distributes the stress generated at the fixed portion between the plate-shaped portion and the fixed portion compared to when it was square, thereby reducing the stress that may act locally at the fixed portion between the plate-shaped portion of the mounting base and the fixed portion, and improving the durability of the mounting structure for a swingable shutter opening / closing mechanism built into the winding drum. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a front view of an air curtain incorporating a shutter device. [Diagram 2] FIG. 2 is a vertical cross-sectional view of an air curtain incorporating a shutter device. [Diagram 3] FIG. 4 is a front view showing the winding body of the shutter device. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 4 is a diagram showing a plate-shaped portion of the switchgear mounting base. [Figure 8] FIG. [Figure 9] 13A and 13B are diagrams showing another embodiment of the plate-shaped portion of the opening / closing mechanism mounting base. [Figure 10] FIG. 13 is a diagram showing a conventional mounting structure for a shutter opening / closing mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Fig. 1 is a schematic front view and bottom view of an external device incorporating a shutter device, and Fig. 2 is a vertical cross-sectional view. The external device comprises side pillars 1 erected on the left and right of an opening, and an upper frame 2 extending so as to bridge between the upper ends of the side pillars 1. The external device according to this embodiment is an air curtain, and an air outlet (not shown) is formed on the visible surface 10 of the side pillars 1 so as to form an air curtain at the opening.

[0015] The upper frame 2 above the opening has left and right side portions 20 in the opening width direction, front and rear facing surfaces 21, 22, an upper surface 23, and a lower surface 24. The shutter device's winding body 3 is rotatably provided in the space surrounded by the left and right side portions 20, the front and rear facing surfaces 21, 22, the upper surface 23, and the lower surface 24, and the upper end of the shutter curtain 4 is connected to the winding body 3. On the left and right sides of the opening, guide columns 5 are provided on the facing surfaces of the left and right side columns 1, and the left and right guide columns 5 have guide rails 50 formed in opposing positions to receive the left and right ends of the shutter curtain 4 and guide them up and down. By rotating the winding body 3, the shutter curtain 4 is wound up by the winding body 3 and rises, or is unwound from the winding body 3 and falls. The internal space of the upper frame 2 serves as a storage section for the shutter curtain 4 wound up by the winding body 3.

[0016] The winding body 3 is equipped with a cylindrical winding drum 30 rotatably supported between the left and right side portions 20, and the shutter curtain 4 is wound up around the outer circumferential surface of the winding drum 30. One end of the winding drum 30 is the driving side, and the other end is the driven side. An opening / closing mechanism 6 is built into the driving side of the winding drum 30, and the rotation of the opening / closing mechanism 6 rotates the winding drum 30, and the shutter curtain 4 is wound onto the winding drum 30 or unwound from the winding drum 30.

[0017] As shown in Figures 1, 3, and 5, a connecting body 31, called a core, located on the drive side is fixed to the inner surface of the winding drum 30, and a shaft portion 60 of the opening / closing mechanism 6 is fixed to the connecting body 31, so that the shaft portion 60 of the opening / closing mechanism 6, the connecting body 31, and the winding drum 30 can rotate together.

[0018] As shown in Figures 1, 3, and 8, a connecting body 32, called a core, is fixed to the inner surface of the winding drum 30 on the driven side, and one end of a driven shaft 33 is fixed to the connecting body 32, the other end of which is supported by a driven-side bracket 34 so as to be freely rotatable.

[0019] That is, the drive side of the hoisting drum 30 is connected to the shaft portion 60 of the opening / closing machine 6, and the driven side of the hoisting drum 30 is connected to a driven shaft 33 that is rotatably supported on the driven side bracket 34, so that the hoisting drum 30 rotates as the drive shaft of the shaft portion 60 of the opening / closing machine 6.

[0020] The opening / closing machine 6 is attached to the winding drum 30 via a mounting base 7. The mounting base 7 has a cylindrical portion 70, and the outer shape of the cylindrical portion 70 is smaller than the inner space of the winding drum 30, and the inner space of the cylindrical portion 70 is larger than the outer shape of the opening / closing machine 6. The opening / closing machine 6 is installed in the cylindrical portion 70 of the mounting base 7, and the shaft portion 60 of the opening / closing machine 6 protrudes from one end side of the cylindrical portion 70 and is fixed to a connecting portion 31 fixed to the inner peripheral surface of the winding drum 30. The opening / closing machine 6 is located in the cylindrical portion 70 and is supported by the swing connecting portion 71 on one end side of the cylindrical portion 70 so as to be swingable up and down. For the configuration of the swing connecting portion 71, the description in the Background Art column of Patent Document 2 can be referred to.

[0021] The other end of the cylindrical portion 70 of the mounting base 7 is provided with a plate-like portion 8, and as shown in Figures 3 and 5, the other end of the cylindrical portion 70 and the plate-like portion 8 are located outside the end (drive side) of the hoisting drum 30, and the plate-like portion 8 is fixed to the fixed portion 9 in a state of surface contact with the fixed portion 9. The fixed portion 9 is an inner portion of one side surface portion 20 of the upper frame 2. The driven-side bracket 34 is fixed to an inner portion of the other side surface portion 20 of the upper frame 2.

[0022] As shown in Fig. 6, the tubular portion 70 is composed of opposing arc-shaped curved portions 70A and opposing flat portions 70B, and has a generally cylindrical overall shape. A swinging connecting portion 71 is provided on the tip side of the flat portion 70B. The plate-like portion 8 according to this embodiment is prepared separately from the tubular portion 70 (see Fig. 7), and is fixed to the base end of the tubular portion 70 by welding to form the mounting base 7. The mounting base 7, which is composed of the tubular portion 70 and the plate-like portion 8, forms a drive side bracket that rotatably supports the drive side of the winding body 3 (winding drum 30).

[0023] The winding body 3 is assembled in the factory by assembling the winding drum 30, connecting portions 31, 32, opening / closing mechanism 6, mounting base 7 (cylindrical portion 70 + plate-shaped portion 8), driven shaft 33, and driven side bracket 34, and then transported to the site as an assembly with the shutter curtain 4 wound around it.The winding body 3 is positioned in the internal space of the upper frame 2, and is incorporated into the external device by attaching the driving side bracket (mounting base 7) and driven side bracket 34 to the inner portion of the side portion 20 of the external device.

[0024] The plate-shaped portion 8 according to this embodiment has an upper half that is substantially semicircular and a lower half that is substantially rectangular, with the upper left and right corners of a square plate cut out in the shape of a quadrant. As shown in Figs. 6 and 7, the periphery of the plate-shaped portion 8 is made up of an upper semicircular edge 80, left and right side edges 81 and 82 that hang down from the left and right sides of the semicircular edge 80, and a horizontal lower edge 83, with the corners of the side edges 81 and 82 and the lower edge 83 each having a radius. An opening 84 is formed in the center of the plate-shaped portion 8, and a plurality of mounting holes 85' are formed in the plate-shaped portion 8 at intervals around the opening 84 in the circumferential direction, and nuts 85 are fixed at the respective mounting holes 85'. The plate-shaped portion 8 is fixed to the fixed portion 9 by fixing a bolt 86 from the fixed portion 9 to a nut 85 of the plate-shaped portion 8 in a surface contact state in which the surface of the plate-shaped portion 8 abuts against the surface of the fixed portion 9.

[0025] When the shutter curtain 4 is raised and lowered, the opening / closing device 6 repeatedly swings up and down, so that stress is generated in the fixed portion of the mounting base 7, which supports the opening / closing device 6 so that it can swing, and the fixed portion 9. However, the plate-shaped portion 8 according to this embodiment has a shape that disperses the stress generated in the fixed portion of the plate-shaped portion 8 and the fixed portion 9, compared to when the plate-shaped portion is square. If the plate-shaped portion of the mounting base of the opening / closing device were square, the plate-shaped portion would have four sides with four interior angles of approximately 90°, and stress would be concentrated at the contact points between the corners of the plate-shaped portion (even if they are rounded) and the fixed portion. In this embodiment, the two corners of the plate-shaped portion 8 are eliminated to form a curved surface, so that a shape is obtained in which the stress transmission to the fixed portion is dispersed, compared to when the plate-shaped portion is square.

[0026] The plate-like portion 8 according to this embodiment has an upper half that is substantially semicircular and a lower half that is substantially rectangular, and is provided with a horizontal lower edge 83, which facilitates handling of the roll 3 during transportation, etc., but the shape of the plate-like portion according to the present invention is not limited to that shown in Figures 4 to 7. By removing some or all of the corners of the plate-like portion to make it a curved surface, or by increasing the number of sides of a polygon and making some or all of the corners larger (for example, 120° or more), a shape can be obtained in which the stress generated at the fixing portion between the plate-like portion and the fixed portion is dispersed compared to a rectangular shape. Another example of the plate-like portion is shown in Figure 9.

[0027] The plate-shaped portion 8A shown in Fig. 9(A) is a disk-shaped portion having an approximately circular circumferential edge 80'. Since the plate-shaped portion 8A does not have any corners, when the surface of the plate-shaped portion 8A is in surface contact with the surface of the fixed portion 9, stress does not locally concentrate at the fixed portion of the plate-shaped portion 8A and the fixed portion 9. The plate-shaped portion 8A is a plate-shaped portion 8 having a lower half with an approximately semicircular shape, but the plate-shaped portion 8A may be a plate-shaped portion 8 having a left-right half with a quadrant shape (i.e., a circular plate-shaped portion with one corner).

[0028] 9(B) is a regular octagonal plate-shaped portion having a first side 81', a second side 82', a third side 83', a fourth side 84', a fifth side 85', a sixth side 86', a seventh side 87', and an eighth side 88', and the interior angles of all eight corners are 135°. In a surface-to-surface contact state in which the surfaces of the plate-shaped portion 8B are in surface contact with the surfaces of the fixed portion 9, the number of corners is increased and all interior angles are made larger than in the case of a square, thereby dispersing stress in the fixed portion between the plate-shaped portion 8B and the fixed portion 9.

[0029] The plate-shaped portion 8C shown in FIG. 9(C) is a hexagonal plate-shaped portion having a first side 81', a second side 82', a third side 83', a fourth side 84', a fifth side 85', and a sixth side 86', and the interior angles of the four corners are 135° and the interior angles of the two corners are 90°. In a surface contact state in which the surfaces of the plate-shaped portion 8C are in surface contact with the surfaces of the fixed portion 9, the number of corners is increased and some of the interior angles are made larger than in the case of a square, thereby dispersing stress at the fixed portion between the plate-shaped portion 8C and the fixed portion 9. Note that in the embodiments shown in FIGS. 9(B) and (C), one or more corners may be curved. [Explanation of symbols]

[0030] 3 Winding body 30 Winding drum 6. Opening and closing mechanism 7 Mounting base for switchgear 70 Cylindrical section 8, 8A, 8B, 8C Plate-shaped part 9 Fixed part

Claims

1. An opening / closing mechanism is built into one end of the winding drum via a mounting base. The mounting base includes a cylindrical portion in which the opening and closing mechanism is housed, and a shaft portion of the opening and closing mechanism protrudes from one end side of the cylindrical portion and is fixed to a connecting portion fixed to an inner peripheral surface of the hoist body, and the opening and closing mechanism is located within the cylindrical portion and is supported on the one end side of the cylindrical portion so as to be able to swing. a plate-shaped portion is provided on the other end side of the cylindrical portion, and the plate-shaped portion is located outside the end of the winding drum, The plate-shaped portion is fixed in a state of contact with a fixed portion, the plate-like portion has a shape that disperses stress generated at a fixing portion between the plate-like portion and the fixed portion, compared to a case where the plate-like portion is rectangular; At least half of the plate-shaped portion is substantially semicircular. Mounting structure for shutter opening and closing mechanism.

2. An opening / closing mechanism is built into one end of the winding drum via a mounting base. The mounting base includes a cylindrical portion in which the opening and closing mechanism is housed, and a shaft portion of the opening and closing mechanism protrudes from one end side of the cylindrical portion and is fixed to a connecting portion fixed to an inner peripheral surface of the hoist body, and the opening and closing mechanism is located within the cylindrical portion and is supported on the one end side of the cylindrical portion so as to be able to swing. a plate-shaped portion is provided on the other end side of the cylindrical portion, and the plate-shaped portion is located outside the end of the winding drum, The plate-shaped portion is fixed in a state of contact with a fixed portion, the plate-like portion has a shape that disperses stress generated at a fixing portion between the plate-like portion and the fixed portion, compared to a case where the plate-like portion is rectangular; The plate-shaped portion has at least six sides and six corners, and at least four corners have interior angles of 120° or more, and all interior angles are 90° or more. Mounting structure for shutter opening and closing mechanism.

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