JP7801182B2 - shutter - Google Patents

Description

The present invention relates to a shutter equipped with a winding shaft that winds up a series of slats.

Conventionally, there is known a shutter in which a shaft (shaft body) that winds up and unwinds a series of slats is rotatably mounted within the shutter case (see Patent Document 1). In this shutter, the multiple slats wound up or unwinded by the shaft rise and fall along a guide rail. The shaft is cylindrical, with support shafts at both ends supported by bearings provided in the shutter case. Various components, such as a drum, are also disposed within the cylindrical shaft. A two-part winding diameter spacer (split spacer) is disposed on the outer surface of the shaft for ease of installation, and each winding diameter spacer is screwed to various components within the shaft via the shaft. The winding diameter spacer is formed into a neat, circular spiral along its thickness, allowing for a well-balanced winding shape with multiple consecutive slats stacked in a spiral.

JP 2014-173334 A

However, in the shutter described in Patent Document 1, a winding diameter spacer is placed on the outer peripheral surface of a cylindrical shaft and is screwed to various components inside the shaft via the shaft. However, because the shaft is interposed between the winding diameter spacer and the screwed components, the winding diameter spacer is positioned at a distance from the screwed components, making it difficult to accurately position the winding diameter spacer.

The object of the present invention is to provide a shutter that can improve the winding ability of multiple connected slats.

It has a series of slats and a winding shaft that can wind up the slats. The winding shaft has a shaft body and shaft holders that are exposed at both ends of the shaft body in the axial direction of the winding shaft. The slats have abutment portions that contact the shaft holders, and the shaft holders are provided with height position setting portions that abut against the abutment portions. The height position setting portions protrude beyond the shaft body in the radial direction of the winding shaft, allowing the winding height position of the slats to be set.

The present invention provides a shutter that can improve the winding ability of multiple connected slats.

1 is an external view showing a shutter according to an embodiment of the present invention; FIG. 2 is a vertical cross-sectional view showing the shutter according to the embodiment. FIG. 3 is a perspective view showing a winding shaft of the shutter according to the embodiment. FIG. 4 is a vertical cross-sectional view showing a slat-extending state of the winding shaft of the shutter according to the embodiment. FIG. 4 is a vertical cross-sectional view showing a state in which the slat is wound around the winding shaft of the shutter according to the embodiment. FIG. 10 is a perspective view showing a modified example of the winding shaft.

[Configuration of this embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 5 , a shutter 1 according to this embodiment is installed on the outdoor side of an opening in an exterior wall of a building such as a detached house. The opening is provided with a window frame 2, which is composed of an upper frame 21, a lower frame 22, and left and right vertical frames 23. The shutter 1 includes a shutter frame 3, a shutter panel 4 supported by the shutter frame 3 so that it can be opened and closed vertically and rolled up, and a shutter case 5 for storing the rolled-up shutter panel 4. A cylindrical winding shaft 6 is installed inside the shutter case 5, which can wind up the shutter panel 4. The shutter frame 3 includes left and right vertical shutter frames 31 and a shutter lower frame 32. The shutter case 5 is disposed above the left and right vertical shutter frames 31. The shutter case 5 has an opening 51 through which the shutter panel 4 passes.
In the following description, the left-right direction of the shutter 1 is the X-axis direction, the up-down direction of the shutter 1 is the Y-axis direction, and the projection direction of the shutter 1 is the Z-axis direction. The X, Y, and Z-axis directions are perpendicular to each other.

The shutter face material 4 has multiple steel slats 41 connected vertically. The uppermost slat 41A (mounting slat) of the multiple slats 41 is screwed to the winding shaft 6 using screws 7 and a backing plate 8. Multiple lower slats 41B, 41C, 41D, 41E, 41F, 41G, etc. are connected to slat 41A (see Figure 5). An end member 40 along the X-axis direction is connected to the lowest slat 41Z. Here, slat 41B is the second slat, slat 41C is the third slat, slat 41D is the fourth slat, slat 41E is the fifth slat, and slat 41F is the sixth slat. Slats 41B to 41F constitute multiple connected slats connected in sequence following slat 41A. Slats 41A to 41F that make up the shutter face material 4 are the portions that are wound around the winding shaft 6 in the first turn.

The slats 41 have connecting portions 42 where the slats 41 are connected to each other at both edges along the X-axis direction, contact portions 43A and 43B that are continuous with the connecting portions 42, and intermediate portions 44 that are continuous with the contact portions 43A and 43B. When the slats 41 are wound around the winding shaft 6, the contact portions 43A and 43B are positioned protruding further toward the winding shaft 6 than the connecting portions 42, and the intermediate portions 44 extend from the contact portions 43A and 43B, respectively, and are positioned farther from the winding shaft 6 than the connecting portions 42 in the winding state. The abutment portions 43A, 43B are arranged on both one side and the other side of the connecting portion 42 in the circumferential direction (R direction) of the winding shaft 6 in the winding state, and the abutment portion 43A is arranged on one side of the connecting portion 42 in the R direction in the winding state and abuts against a height position setting portion 80 described below, while the abutment portion 43B is arranged on the other side of the connecting portion 42 in the R direction in the winding state and abuts against the height position setting portion 80. Note that the circumferential direction mentioned above is along the R direction of rotation of the winding shaft 6 about the axis C of the winding shaft 6. In this embodiment, as shown in FIG. 2 , the slats 41A and 41B are arranged to fit within the shutter case 5 without protruding from the opening 51 of the shutter case 5 even when the shutter face material 4 is unwound, and the slat 41C is arranged so that a portion of it can slightly protrude from the opening 51. As a result, even if slats 41A and 41B are damaged, it will not be noticeable from the outside of the shutter, and even if slat 41C is damaged, it will not be noticeable from the outside as long as there is no damage to the part protruding from opening 51.

The winding shaft 6 comprises a generally cylindrical shaft body 61 along the X-axis direction (the axial direction of the winding shaft 6) made from roll-formed steel sheet metal, and resin auxiliary wheels 62, 63 serving as shaft holders exposed at both ends 66, 67 (one end 66, the other end 67) of the shaft body 61 in the X-axis direction (see Figure 3). Inside the shaft body 61, although not shown, are an electric motor that rotates the winding shaft 6 and a balance spring that resists the weight of the shutter face material 4 unwound from the winding shaft 6. The auxiliary wheels 62, 63 hold the shaft body 61 and are rotatably supported on the shutter case 5 via a support shaft and bearings. The shaft body 61 can be reused as is by replacing the auxiliary wheels 62, 63 with other auxiliary wheels depending on the shape of the slat 41.

The shaft body 61 has a crimped portion 65 (joint) that joins the edges of the steel plate being rolled along the X-axis direction. The shaft body 61 also has recesses 611 and 612 that face each other across the axis C and are recessed into the inner periphery of the shaft body 61. Adjacent to one side of the recess 611 in the R direction is a stepped positioning portion 613 that determines the mounting position of the uppermost slat 41A relative to the winding shaft 6. The recess 611 holds the back plate 8, and the slat 41A is fastened to this back plate 8 with screws 7. The recesses 611 and 612 fit into the auxiliary wheels 62 and 63. The shaft body 61 described above is formed with a hollow portion 614 that runs along the X-axis direction. The shaft body 61 is made of steel, and if steps were to be formed on it to neatly wind the slats 41 into a spiral, the number of roll steps required for roll forming would increase, which could result in larger equipment and increased equipment costs. However, in this embodiment, the auxiliary wheels 62, 63 are provided with height position setting units 80, which will be described later, eliminating the need to form the aforementioned steps on the shaft body 61 itself.

The auxiliary wheel 62 has a wheel body 70 disposed at one end of the shaft body 61 in the X-axis direction, and a height position setting portion 80 provided integrally with the wheel body 70 .
The wheel body 70 integrally comprises an inner cylindrical portion 71 through which a support shaft (not shown) journaled to the shutter case 5 is inserted and attached to the support shaft, an outer cylindrical portion 72 disposed on the outer periphery of the inner cylindrical portion 71, and a disk portion 73 connecting the inner cylindrical portion 71 and the outer cylindrical portion 72, and a plurality of ribs 74 extending radially from the axis C are formed between the inner cylindrical portion 71 and the outer cylindrical portion 72 to connect the inner cylindrical portion 71 and the outer cylindrical portion 72. The outer cylindrical portion 72 has an insertion cylindrical portion 721 inserted into the shaft body 61 from one end 66, and an end cylindrical portion 722 exposed to the outside from the insertion cylindrical portion 721 and the one end 66. Insertion tube portion 721 has an outer diameter approximately equal to the inner diameter of shaft body 61, and end tube portion 722 has an outer diameter approximately equal to the outer diameter of shaft body 61, with a stepped portion connecting insertion tube portion 721 and end tube portion 722. Outer peripheral tube portion 72 is formed with fitting recesses 723, 724 that fit into recesses 611, 612 of shaft body 61, and a recess 725 in which crimped portion 65 of shaft body 61 is disposed. A plurality of height position setting portions 80 are formed integrally with outer peripheral surface 72A of end tube portion 722 of wheel body 70.

The plurality of height position setting portions 80 each protrude beyond the outer peripheral surface 72A in the radial direction D of the winding shaft 6 so as to be able to set the winding height position of the slat 41 (a position spaced from the axis C in the radial direction D), and in this embodiment are configured as height position setting portions 80A, 80B, 80C, 80D, and 80E arranged at positions spaced apart in the direction R. Furthermore, abutment protrusions 85 that abut against the slat 41 are provided respectively in the portions between the height position setting portions 80B and 80C, between the height position setting portions 80C and 80D, and between the height position setting portions 80D and 80E.
As shown in Figure 5, the height position setting portion 80A is positioned in the radial direction D at a position corresponding to both the abutment portion 43B of slat 41B and the abutment portion 43A of slat 41C, the height position setting portion 80B is positioned in the radial direction D at a position corresponding to both the abutment portion 43B of slat 41C and the abutment portion 43A of slat 41D, the height position setting portion 80C is positioned in the radial direction D at a position corresponding to both the abutment portion 43B of slat 41D and the abutment portion 43A of slat 41E, the height position setting portion 80D is positioned in the radial direction D at a position corresponding to both the abutment portion 43B of slat 41E and the abutment portion 43A of slat 41F, and the height position setting portion 80E is positioned in the radial direction D at a position corresponding to both the abutment portion 43B of slat 41F and the abutment portion 43A of slat 41G. The height dimensions of the height position setting portions 80A to 80E in the radial direction D are set corresponding to the height positions of the contact portions 43A, 43B of the individual slats 41B to 41G at which the multiple consecutive slats 41 should be positioned when they are neatly wound spirally around the winding shaft 6. A recess 725 is disposed between the height position setting portions 80A and 80B.
The contact protrusions 85 are integrally continuous with the height position setting portions 80B and 80C, integrally continuous with the height position setting portions 80C and 80D, and integrally continuous with the height position setting portions 80D and 80E. Therefore, the height position setting portions 80B to 80E are continuous in the R direction via the contact protrusions 85. Furthermore, the contact protrusions 85 are formed to fit the surface shape of the intermediate portion 44 of the slat 41 on the side of the winding shaft 6 in the wound state. Therefore, each contact protrusion 85 protrudes in the radial direction D further than the height position setting portions 80B to 80E to which it is continuous.

As shown in Figures 3A and 3B, the auxiliary wheel 63 is configured in the left-right reverse of the auxiliary wheel 62, but each component is the same as the auxiliary wheel 62. Therefore, the components of the auxiliary wheel 63 are appropriately assigned the same reference numerals as the components of the auxiliary wheel 62, and detailed descriptions will be omitted.

In the shutter 1 described above, the winding shaft 6 operates as follows.
In the unreeled state of slats 41 shown in Fig. 4, when the winding shaft 6 rotates in the winding direction (clockwise in Figs. 4 and 5), the winding shaft 6 sequentially winds up slats 41B, 41C, ... connected to slat 41A, resulting in the wound state of slats 41 shown in Fig. 5. Note that Fig. 5 shows the first round of slats 41 wound around the winding shaft 6, and the subsequent slats 41 are not shown. In the retracted state, the height position setting portion 80A is in contact with both the abutment portion 43B of slat 41B and the abutment portion 43A of slat 41C, the height position setting portion 80B is in contact with both the abutment portion 43B of slat 41C and the abutment portion 43A of slat 41D, the height position setting portion 80C is in contact with both the abutment portion 43B of slat 41D and the abutment portion 43A of slat 41E, the height position setting portion 80D is in contact with both the abutment portion 43B of slat 41E and the abutment portion 43A of slat 41F, and the height position setting portion 80E is in contact with both the abutment portion 43B of slat 41F and the abutment portion 43A of slat 41G. The abutment protrusions 85 are also in contact with the intermediate portions 44 of the slats 41D, 41E, and 41F. As a result, the entire surfaces of both edges of slats 41D-41F in the X-axis direction facing the winding shaft 6 abut against the auxiliary wheels 62, 63. In this way, the multiple connected slats 41 abut against the multiple height position setting portions 80 and the contact protrusions 85, allowing them to be neatly wound in a spiral around the winding shaft 6. This reduces fluctuations in the rotational torque of the winding shaft 6 that may occur due to, for example, the relationship between the balance spring and the connection form of the multiple connected slats 41, allowing the multiple connected slats 41 to be smoothly wound. Furthermore, because contact between the multiple connected slats 41 and the shaft body 61 is reduced, the risk of burrs on the shaft body 61 damaging the slats 41 can be reduced, for example.
5, when the winding shaft 6 rotates in the unwinding direction (counterclockwise in FIGS. 4 and 5), the multiple slats 41 are unwound and separated from the winding shaft 6 in the order of slats 41G, 41F, 41E, ... In this case, too, fluctuations in the rotational torque of the winding shaft 6 can be suppressed, as described above, and the multiple slats 41 can be smoothly unwound.

[Modification]
In the above embodiment, the winding shaft 6 is formed by rolling a steel metal plate, but this is not a limitation and the winding shaft 6 may be formed from other materials such as aluminum as long as it is capable of winding and unwinding the slats 41. Furthermore, the auxiliary wheels 62, 63 are made of resin, but this is not a limitation and the wheels 62, 63 may be made of die-cast aluminum for fire prevention purposes, for example.
In the above embodiment, the height position setting unit 80 is formed integrally with the auxiliary wheels 62, 63, but this is not limiting. The height position setting unit 80 may be a separate part as long as it can be attached directly to the outer circumferential tube portion 72 of the auxiliary wheels 62, 63 without going through the shaft main body 61 and the attachment position can be accurately determined, and the shaft holder may be formed by this separate part, the height position setting unit 80, and the main body portion of the auxiliary wheels 62, 63 excluding this part.
In the above embodiment, the abutment portions 43A, 43B, which are arranged on either side of the connecting portion 42 of the slat 41, are configured to abut against a common height position setting portion 80 in the wound state, but this is not limited to this, and the configuration may also be such that one of the abutment portions 43A, 43B abuts against the height position setting portion 80 and the other does not abut.
In the above embodiment, the abutment portions 43A, 43B are arranged on both sides of the intermediate portion 44 of the slat 41, but this is not limiting and instead of the abutment portions 43A, 43B, a contact portion may be provided at a different position, for example, at the intermediate portion 44. In this case, the slat 41 is configured so that the intermediate portion 44 is directly continuous with the connecting portion 42, and the height position setting portion 80 is arranged at a position corresponding to the position of the abutment portion so that the abutment portion can abut against it.
In the above embodiment, each of the contact protrusions 85 is integrally continuous with the height position setting portions 80 on both sides in the R direction, but they may be discontinuous. Furthermore, if there is no need to consider deformation such as dents in the slats when dropped in a packaged state, the contact protrusions 85 may be omitted.
In the above embodiment, the winding shaft 6 includes auxiliary wheels 62, 63 as a shaft holder. However, as shown in FIG. 6 , one of the auxiliary wheels 62, 63 may be replaced with a motor adapter 91 as a shaft holder. The motor adapter 91 holds the shaft body 61 and is equipped with an electric motor, such as a tubular motor. The motor adapter 91 includes an inner cylindrical portion 92 having an inner diameter corresponding to the outer diameter of the electric motor and an outer cylindrical portion 93 disposed radially outward from the inner cylindrical portion 92. The inner cylindrical portion 92 and the outer cylindrical portion 93 are connected by a plurality of ribs 94 radiating from the axis C. The outer cylindrical portion 93 is formed similarly to the outer cylindrical portion 72 described above. The outer peripheral surface 72A of the outer cylindrical portion 93 has a plurality of height position setting portions 80 protruding in the radial direction D. Therefore, even when the motor adapter 91 is provided, the plurality of slats 41 can be smoothly and neatly wound in a spiral. 6, the height position setting portion 80 is formed to be wide in the R direction, and the contact protrusion 85 is formed to be narrow. Therefore, the continuous height position setting portion 80 and the contact protrusion 85 do not contact the entire surface of the corresponding slat 41 on the winding shaft 6 side, and a non-contact area is also generated.

[Summary of the invention]
The shutter of the present invention has a plurality of slats connected together and a winding shaft capable of winding up the slats, the winding shaft having a shaft body and a shaft holder exposed at both ends of the shaft body in the axial direction of the winding shaft, the slats having an abutment portion for contacting the shaft holder, the shaft holder having a height position setting portion against which the abutment portion abuts, and the height position setting portion protrudes beyond the shaft body in the radial direction of the winding shaft so as to be able to set the winding height position of the slats.
According to the shutter of the present invention, the height position setting portion can be provided directly on the shaft holders provided exposed at both ends of the shaft body, so that it is not necessary to, for example, arrange a split spacer divided into two on the outer circumferential surface of the shaft body and screw this split spacer to various components arranged inside the shaft body via the shaft body, and the height position setting portion can be positioned accurately. As a result, multiple consecutive slats can be wound around the winding shaft as desired, improving the winding ability of the multiple consecutive slats.

In the shutter of the present invention, the height position setting portion may be formed integrally with the shaft holder.
With this configuration, the number of parts can be reduced and the shaft holder can be positioned more accurately than in the case where the shaft holder is constructed by attaching a separate height position setting unit to the main body of the shaft holder, for example.

In the shutter of the present invention, the multiple connected slats each have a connecting portion to which they are connected, and the abutment portion is provided on both one side and the other side of the connecting portion in the circumferential direction of the winding shaft, and the height position setting portion may be arranged at a position corresponding to both the abutment portion on one side and the abutment portion on the other side in the radial direction.
With this configuration, multiple slats can be wound up more stably than, for example, when only the abutment portion on one side or the other side of the connecting portion in the circumferential direction abuts against the height position setting portion.

In the shutter of the present invention, the multiple connected slats include a mounting slat attached to the shaft body and multiple connecting slats connected in sequence to the mounting slat, and the height position setting portions are arranged in multiple positions in the radial direction corresponding to the abutment portions of the multiple connecting slats, and the height dimensions in the radial direction of the multiple height position setting portions may be set according to each of the connecting slats with which they abut.
With this configuration, the height of each of the height position setting sections can be set in the radial direction so that each of the plurality of connected slats is positioned at an appropriate height, thereby enabling the plurality of connected slats to be wound up as desired. For example, since the height positions of the plurality of height position setting sections can be set individually to wind up the plurality of connected slats in a neat spiral, it is not necessary for the height positions of the plurality of height position setting sections to increase in steps in the circumferential direction.

In the shutter of the present invention, the multiple connecting slats are composed of a second slat connected to the mounting slat, a third slat connected to the second slat, a fourth slat connected to the third slat, a fifth slat connected to the fourth slat, and a sixth slat connected to the fifth slat, and in the portions of the multiple height position setting portions between the height position setting portions that respectively abut against the abutment portions on the third slat to the sixth slat, a contact protrusion that continues the height position setting portion as a single unit and abuts against the slat may be formed protruding in the radial direction.
With this configuration, even if the packaged part with multiple slats wound around the winding shaft before assembly into the shutter is accidentally dropped, the abutting protrusions abut against the slats between the height position setting parts, reducing the risk of deformation such as dents in the slats. Furthermore, because the abutting protrusions are integrally continuous with the height position setting parts, the abutting protrusions can be formed to be wide in the radial direction, allowing them to abut against a wide area of the slats, further reducing the risk of deformation such as dents when dropped as described above.

1... shutter, 2... window frame, 21... upper frame, 22... lower frame, 23... vertical frame, 3... shutter frame, 31... shutter vertical frame, 32... shutter lower frame, 4... shutter surface material, 40... end member, 41, 41A to 41G, 41Z... slat, 42... connecting portion, 43A, 43B... abutment portion, 44... middle portion, 5... shutter case, 51... opening, 6... winding shaft, 61... shaft body, 611, 612... recess, 613... positioning portion, 614... hollow portion, 62, 6 3...auxiliary wheel, 65...crimping portion, 66...one end, 67...other end, 7...screw, 70...wheel body, 71, 92...inner cylindrical portion, 72, 93...outer cylindrical portion, 721...insertion cylindrical portion, 722...end cylindrical portion, 723, 724...fitting recess, 725...recess, 72A...outer peripheral surface, 73...disc portion, 74, 94...rib, 8...back plate, 80, 80A to 80E...height position setting portion, 85...abutment protrusion, 91...motor adapter, C...axis center, D...radial direction, R...circumferential direction.

Claims (3)

A winding shaft is provided for winding up the slats.
the winding shaft includes a shaft body and shaft holders provided on both ends of the shaft body in the axial direction of the winding shaft so as to be exposed,
The slat has an abutment portion that abuts against the shaft holder,
The shaft holder is provided with a height position setting portion with which the abutting portion abuts,
the height position setting portion protrudes from the shaft body in the radial direction of the winding shaft so as to be able to set the winding height position of the slat ,
The plurality of connected slats includes a mounting slat attached to the shaft body and a plurality of connecting slats connected in sequence to the mounting slat,
The plurality of connecting slats are composed of a second slat connected to the mounting slat, a third slat connected to the second slat, a fourth slat connected to the third slat, a fifth slat connected to the fourth slat, and a sixth slat connected to the fifth slat,
The height position setting portions are arranged at positions corresponding to the contact portions of the connecting slats in the radial direction,
height dimensions in the radial direction of the plurality of height position setting portions are set according to the individual connecting slats having the abutment portions that respectively abut against the connecting slats,
Among the plurality of height position setting portions, a contact protrusion that is integrally continuous with the height position setting portions and that abuts against the slats is formed in a portion between the height position setting portions that abut against the abutting portions of the third slat to the sixth slat, and that protrudes in the radial direction.
A shutter characterized by: The shutter according to claim 1 ,
The shutter, wherein the height position setting portion is formed integrally with the shaft holder. The shutter according to claim 1 ,
The plurality of connected slats each have a connecting portion where they are connected to each other,
the abutment portion is provided on both one side and the other side of the winding shaft relative to the connecting portion in the circumferential direction of the winding shaft,
The shutter, wherein the height position setting portion is disposed at a position corresponding to both the contact portion on one side and the contact portion on the other side in the radial direction.