JP5237760B2 - Shutter slats - Google Patents

Description

  The present invention relates to a shutter slat, and in particular, on both side portions along at least one longitudinal direction in contact with other shutter slats of first and second interlock portions, an intermediate portion along the at least one longitudinal direction. By providing the enlarged diameter portion having the second outer diameter larger than the first outer diameter, it is possible to prevent the design portion of the shutter slat from being scratched, and to make it possible to maintain the aesthetics more reliably. It is about the improvement.

Generally, a shutter device for opening and closing the entrance / exit is provided at an entrance / exit such as a front entrance of a store or a window of a house. The shutter device is provided with a winding member provided at an upper portion of the entrance / exit and a shutter curtain connected to the take-up member, and when the entrance / exit is opened, the shutter curtain is the winding unit. It is wound up on a take-up member.
The shutter curtain is composed of a plurality of shutter slats connected to each other, and when the shutter curtain is wound around the winding member, the shutter slat is moved along the radial direction of the winding member. Superimposed on each other. For this reason, the shutter slats rub against each other, and the shutter slats may be damaged and the aesthetic appearance may be impaired.

  Thus, for example, the following configuration is proposed in the following Patent Document 1 and the like. FIG. 14 is a side view showing a conventional shutter slat. In the figure, a shutter curtain 40 constituted by a plurality of shutter slats 10 connected to each other is wound around a pulley 32 which is a winding member. A protrusion 90 having a substantially F-shaped cross section protrudes from the back surface 10 b of each shutter slat 10, and this protrusion 90 extends in the entire longitudinal direction L of the shutter slat 10. A bulging portion 91 having a substantially U-shaped cross section is provided at the tip of the protruding portion 90, and only the bulging portion 91 is in contact with the surface 10 f of the overlaid shutter slat 10. That is, in the conventional shutter slat, the protruding portion 90 protrudes from the back surface 10b of the shutter slat 10, so that the contact portion between the overlapping shutter slats 10 is narrowed, and the shutter slat 10 is hardly damaged.

Japanese Utility Model Publication No. 7-26592

  In the conventional shutter slats as described above, the contact portion between the overlapping shutter slats 10 is narrowed so that the shutter slats 10 are less likely to be scratched. Scratches will occur. In particular, since the protrusion 90 extends in the entire longitudinal direction L, the design portion at the intermediate position along the longitudinal direction L of the shutter slat 10 is damaged. This scratch on the design portion is easily noticeable and greatly detracts from the beauty of the shutter slat 10.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a shutter slat that can prevent the design portion of the shutter slat from being scratched and can maintain its aesthetics more reliably. provide.

A shutter slat according to the present invention is provided with a longitudinal slat body, and curled first and second interlaces provided at both ends of the slat body in the short direction and extending along the longitudinal direction of the slat body. And a shutter curtain for opening and closing the entrance and exit by engaging the first and second interlock portions with the interlock portions of the other shutter slats, and at the upper part of the entrance and exit When the shutter curtain is wound around the winding member provided, at least one of the first and second interlock portions is located inward or outward along the radial direction of the winding member. A shutter slat formed so as to be in contact with the shutter slat, which contacts the other shutter slats of the first and second interlock portions. A second outer diameter that is provided on at least one of the at least one side and that is disposed on both sides along the longitudinal direction of the at least one and that is larger than a first outer diameter of an intermediate portion along the longitudinal direction of the at least one of the at least one. The expanded diameter part is formed by expanding the both side parts.
A longitudinal slat body; and curl-shaped first and second interlock portions provided at both lateral ends of the slat body and extending along the longitudinal direction of the slat body. The first and second interlock portions are engaged with the interlock portions of other shutter slats to form a shutter curtain for opening and closing the entrance and exit, and a winding member provided on the upper portion of the entrance and exit When the shutter curtain is wound up, at least one of the first and second interlock portions is brought into contact with another shutter slat positioned inward or outward along the radial direction of the winding member. The at least one shutter slat formed to be in contact with the other shutter slat of the first and second interlock portions. A swell portion having a second outer diameter larger than a first outer diameter of the intermediate portion along the longitudinal direction and provided at both sides along the longitudinal direction of the at least one The swelled portion is formed by bending a projecting piece extending from the both side portions along the longitudinal direction so as to overlap the both side portions.

A longitudinal slat body; and curl-shaped first and second interlock portions provided at both lateral ends of the slat body and extending along the longitudinal direction of the slat body. , wherein the first and both side portions along the longitudinal direction of the second interlocking unit, which upset portion is provided with a larger second outside diameter than the first outer diameter of the intermediate portion along the longitudinal direction The expanded diameter portion is formed by expanding the both side portions.
A longitudinal slat body; and curl-shaped first and second interlock portions provided at both lateral ends of the slat body and extending along the longitudinal direction of the slat body. In addition, on both side portions of the first and second interlock portions along the longitudinal direction, swelled portions having a second outer diameter larger than the first outer diameter of the intermediate portion along the longitudinal direction are provided. The swelled portion is formed by bending a projecting piece extending from the both side portions along the longitudinal direction so as to overlap the both side portions.

According to the shutter slat of the present invention, at least one of the intermediate portions along the longitudinal direction of the at least one of the first interlocking portion and the second interlocking portion is in contact with the other shutter slats along the longitudinal direction. Since the enlarged diameter portion having the second outer diameter larger than the first outer diameter is provided, when the shutter curtain is wound around the winding member, an air gap is formed between the shutter curtain and the other shutter slats at an intermediate position along the longitudinal direction. It can be formed, and only the both sides hidden by the guide rail can be damaged by rubbing with other shutter slats. Therefore, it is possible to prevent the design portion of the shutter slat from being scratched and to maintain the aesthetics more reliably. In addition, it is possible to prevent peeling of the coating at the design portion and to maintain the corrosion resistance of the design portion more reliably.
In addition, since the bulging portion having the second outer diameter larger than the first outer diameter is formed on both sides, the conventional configuration, that is, the configuration in which the protrusion 90 having a complicated shape protrudes from the back surface of the shutter slat 10. Compared to, it can be formed by a simple process and can be mass-produced more easily.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing a shutter slat 10 according to Embodiment 1 of the present invention. In addition, the same code | symbol is demonstrated about the part which is the same as that of a conventional structure, or an equivalent. In the figure, a shutter slat 10 is provided with a longitudinal slat body 1 and curled shapes provided at both ends in the short direction S of the slat body 1 and extending along the longitudinal direction L of the slat body 1. First and second interlock portions 2 and 3 are provided. The longitudinal direction L is a direction along the width direction W of the shutter curtain 40 (see FIGS. 3 and 4) formed by the shutter slat 10, and the short direction S is the height of the shutter curtain 40. It is a direction along the direction H. The slat main body 1 includes a central plate portion 1a having a corrugated cross section, and first and second leg portions 1b and 1c bent from both ends of the central plate portion 1a toward the back surface direction B. The first interlock portion 2 is integrally provided at the end of the first leg portion 1b and is curled toward the surface direction F. The second interlock portion 3 is integrally provided at an end portion of the second leg portion 1c and is curled toward the back surface direction B.

  An enlarged diameter portion 4 is provided on both side portions 2 s along the longitudinal direction L of the first interlock portion 2. Each enlarged diameter portion 4 has a second outer diameter R2 that is larger than the first outer diameter R1 of the intermediate portion 2m along the longitudinal direction L of the first interlock portion 2.

Next, a method for manufacturing the shutter slat 10 of FIG. 1 will be described.
FIG. 2 is an explanatory view showing the formation of the enlarged diameter portion 4 of FIG. In the drawing, an extrusion die 25 having a tapered portion 25a provided at the tip is disposed outside the first interlock portion 2 along the longitudinal direction L. After the first and second interlock portions 2 and 3 are formed at both ends of the slat main body 1, the extrusion mold 25 is inserted from the outside into the both side portions 2s of the first interlock portion 2. Thus, the two side portions 2s are expanded, and the pair of enlarged diameter portions 4 are formed on the two side portions 2s (only one side is shown in FIG. 2).

Next, a shutter device using the shutter slat 10 of FIG. 1 will be described.
3 is a front view showing a shutter device using the shutter slat 10 of FIG. 1, FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3, and FIG. It is a side view which shows the state by which the shutter curtain 40 was wound up.
In FIG. 3, a winding mechanism 30 is disposed above the entrance that is opened and closed by the shutter device. The winding mechanism 30 includes a shaft 31, a pair of pulleys 32 that are winding members, and a pair of springs 33. The shaft 31 is supported by a bearing (not shown), and the pulley 32 and the spring 33 are attached to both sides of the shaft 31.

  The pulley 32 is connected to the upper end of the shutter curtain 40. As shown in FIG. 4, the shutter curtain 40 includes a plurality of shutter slats 10 connected to each other by engaging the first interlock part 2 and the second interlock part 3. . When the doorway is opened, the shutter curtain 40 is wound around the pulley 32 (see FIG. 5).

  Returning to FIG. 3, the spring 33 biases the shaft 31 in the rotational direction in which the shutter curtain 40 is wound up when the doorway is opened. A pair of guide rails 50 are arranged on both sides along the width direction W of the shutter curtain 40. The guide rail 50 guides both sides 10s along the longitudinal direction L of each shutter slat 10 when the shutter curtain 40 is displaced along the height direction H of the entrance / exit. That is, the both sides 10 s of each shutter slat 10 are hidden by the guide rails 50, and a design portion 10 d at an intermediate position 10 m along the longitudinal direction L of each shutter slat 10 is exposed between the guide rails 50. .

  As shown in FIG. 5, when the shutter curtain 40 is wound around the pulley 32, a plurality of shutter slats 10 are stacked along the radial direction D of the pulley 32. Here, one of the plurality of shutter slats 10 is referred to as a first shutter slat 101, and the shutter slats 10 that are connected to the first shutter slat 101 and are adjacent to each other along the circumferential direction C of the pulley 32 are the first shutter slats 101. This is called two shutter slats 102. Further, the shutter slat 10 that is located inward along the radial direction D from the first shutter slat 101 and on which the first shutter slat 101 is overlapped is referred to as a third shutter slat 103.

  The first interlock portion 2 of the first shutter slat 101 is positioned in the back surface direction B (inward along the radial direction D) than the second interlock portion 3 of the second shutter slat 102. This is because the first interlock portion 2 is curled toward the front surface direction F and the second interlock portion 3 is curled toward the back surface direction B. The first interlock portion 2 of the first shutter slat 101 is positioned more inward along the radial direction D than the first shutter slat 101 when the shutter curtain 40 is wound around the pulley 32. The third shutter slat 103 is brought into contact with the slat body 1.

  Next, FIG. 6 is a sectional view taken along line VI-VI in FIG. In the figure, the first shutter slat 101 is overlaid on the third shutter slat 103. The swelled portion 4 of the first shutter slat 101 is in contact with the third shutter slat 103 at both sides 10s along the longitudinal direction L, and at the intermediate position 10m along the longitudinal direction L, A gap 60 is formed between the first shutter slat 101 and the third shutter slat 103. That is, the design portion 10 d of the third shutter slat 103 is not in contact with the first shutter slat 101. This prevents the first interlock portion 2 of the first shutter slat 101 from coming into contact with the design portion 10d of the third shutter slat 103, and prevents the design portion 10d from being damaged.

Although FIG. 5 shows a case where the shutter curtain 40 is normally wound, the shutter curtain 40 may be reversely wound as is well known. When the shutter curtain 40 is wound in the reverse direction, the first interlock portion 2 of the first shutter slat 101 is a fourth shutter slat (not shown) located outward from the first shutter slat 101 along the radial direction D. Abut. Even in this case, the expanded diameter portion 4 of the first interlock portion 2 of the first shutter slat 101 forms a gap 60 between the fourth shutter slat and the design portion of the fourth shutter slat is damaged. To prevent.
That is, the expanded diameter portion 4 provided in the first interlock portion 2 is brought into contact with another shutter slat positioned inward or outward along the radial direction D of the pulley 32.

FIG. 1 shows a configuration in which the first interlock portion 2 is curled toward the front surface direction F and the second interlock portion 3 is curled toward the back surface direction B. If a connecting shutter slat (not shown) in which the interlock portions on both sides are curled toward the back surface is used to configure, both the first and second interlock portions 2 and 3 are in the surface direction F. It may be curled towards. In this case, the expanded diameter portion 4 may be formed in both the first and second interlock portions 2 and 3.
That is, the expanded diameter portion 4 is provided on at least one of the first and second interlock portions 2 and 3 that are in contact with other shutter slats positioned inward or outward along the radial direction D of the pulley 32. It only has to be done.

In such a shutter slat 10, the at least one longitudinal direction L is disposed on both side portions 2 s along the longitudinal direction L that are in contact with the other shutter slats of the first and second interlock portions 2 and 3. Is provided with an enlarged diameter portion 4 having a second outer diameter R2 larger than the first outer diameter R1 of the intermediate portion 2m along the intermediate position 2m. The gap 60 can be formed between other slats and only the both sides 10s hidden by the guide rail can be damaged by rubbing with other shutter slats. Therefore, it is possible to prevent the design portion 10d of the shutter slat 10 from being scratched, and the aesthetic appearance can be more reliably maintained. In addition, it is possible to prevent peeling of the coating at the design portion 10d, and it is possible to more reliably maintain the corrosion resistance of the design portion 10d.
Further, since the expanded diameter portion 4 having the second outer diameter R2 larger than the first outer diameter R1 is formed on both side portions 2s, the protrusion 90 having a complicated shape is formed from the conventional configuration, that is, from the back surface of the shutter slat 10. Compared to the structure in which the protrusion is made, it can be formed by a simple process and can be mass-produced more easily.

  Further, since the swelled portion 4 is formed by expanding the both side portions 2s, a step for forming the swelled portion 4 in a series of plastic processing for forming the shutter slat 10 is performed. It can be easily incorporated, and mass production can be simplified more reliably.

Embodiment 2. FIG.
FIG. 7 is a perspective view showing a shutter slat 10 according to the second embodiment of the present invention. Note that portions that are the same as or equivalent to those in the first embodiment are described using the same reference numerals. In the first embodiment, it has been described that the enlarged diameter portion 4 is formed by expanding both side portions 2s of the first interlock portion 2. However, in the second embodiment, the enlarged diameter portion 4 is the first Projection pieces 65 extending along the longitudinal direction L from both side portions 2 s of the interlock portion 2 are formed so as to be overlapped with both side portions 2 s of the first interlock portion 2. Other configurations are the same as those of the first embodiment.

  In such a shutter slat 10, the protruding piece 65 is bent to form the expanded diameter portion 4. Therefore, as in the first embodiment, the expanded diameter is included in a series of plastic processing for forming the shutter slat 10. A process for forming the portion 4 can be easily incorporated, and mass production can be simplified more reliably.

Embodiment 3 FIG.
FIG. 8 is a perspective view showing a shutter slat 10 according to Embodiment 3 of the present invention. Note that the same or equivalent parts as those in the first and second embodiments will be described using the same reference numerals. In the figure, a sheet member 70 that is a plate-like resin member or an elastic member is attached to the outer periphery of both side portions 2 s of the first interlock portion 2. That is, in the first embodiment, the expanded diameter portion 4 is formed by expanding the both side portions 2s. However, in the third embodiment, the sheet member 70 is attached to the both side portions 2s. Thus, the expanded diameter portion 4 is formed. Other configurations are the same as those in the first embodiment.

  In the shutter slat 10 as described above, the bulging portion 4 is formed by attaching the sheet member 70 to the both side portions 2s. Therefore, the bulging portion 4 can be easily formed, and mass production can be more reliably performed.

Embodiment 4 FIG.
FIG. 9 is a perspective view showing a shutter slat 10 according to Embodiment 4 of the present invention. The same or equivalent parts as those in the first to third embodiments will be described using the same reference numerals. In the figure, a cap member 80, which is a resin member or an elastic member whose outer shape is cylindrical, is engaged with both side portions 2 s of the first interlock portion 2 from the outside in the longitudinal direction L. That is, in the fourth embodiment, the expanded diameter portion 4 is formed by engaging the cap member 80 with the both side portions 2s. Other configurations are the same as those in the first embodiment.

  In this manner, the enlarged diameter portion 4 can be easily formed as in the third embodiment also by engaging the cap member 80 with the two side portions 2s.

Embodiment 5 FIG.
FIG. 10 is a perspective view showing a shutter slat 10 according to the fifth embodiment of the present invention. In addition, about the same or equivalent part as the structure of Embodiment 1-4, it demonstrates using the same code | symbol. In the figure, both side portions 1 s along the longitudinal direction L of the slat body 1 have a surface direction along the plate thickness direction T of the slat body 1 rather than an intermediate portion 1 m along the longitudinal direction L of the slat body 1. A protruding portion 5 protruding toward F is provided. That is, each protrusion 5 has a second end surface S2 that protrudes in the surface direction F from the first end surface S1 of the intermediate portion 1m. The protrusions 5 are provided inward along the longitudinal direction L from both ends of the slat body 1 along the longitudinal direction L. Note that the protrusions 5 may be provided from both ends of the slat body 1. Further, the protruding portion 5 is formed by pushing out the both side portions 1s, attaching a sheet member to the both side portions 1s, and engaging the cap members with the both side portions 1s. Further, the protruding portion 5 may be formed by bending a protruding piece extending along the longitudinal direction L from the both side portions 1s so as to overlap the both side portions 1s.

  Next, FIG. 11 is a cross-sectional view of a main part when the shutter slat 10 of FIG. 10 is overlapped along the radial direction D of the pulley 32. Here, as in the first embodiment, one of the plurality of shutter slats 10 is referred to as a first shutter slat 101, and the shutter is located inward along the radial direction D with respect to the first shutter slat 101. The slat 10 is referred to as a third shutter slat 103 (see FIGS. 5 and 6).

  In FIG. 11, the first shutter slat 101 is overlaid on the third shutter slat 103. The expanded diameter portion 4 of the first shutter slat 101 is in contact with the protruding portion 5 of the third shutter slat 103 at both sides 10s along the longitudinal direction L. That is, in the fifth embodiment, the swelled portion 4 and the protruding portion 5 provide a gap between the first shutter slat 101 and the third shutter slat 103 at the intermediate position 10m along the longitudinal direction L. A gap 60 is formed. Other configurations are the same as those in the first embodiment.

  In such a shutter slat 10, the inner side or the outer side along the radial direction D of the pulley 32 when the shutter curtain 40 is wound around the pulley 32 on both side portions 1 s along the longitudinal direction L of the slat body 1. The protruding portion 5 protruded along the plate thickness direction T of the slat main body 1 rather than the intermediate portion 1m along the longitudinal direction L of the slat main body 1 so as to be in contact with another shutter slat located at Since it is provided, the gap 60 formed between the shutter slats can be made larger. In other words, a sufficiently large gap 60 can be secured even with the swelled portion 4 having a small diameter, compared to the case where the protruding portion 5 is not provided.

Embodiment 6 FIG.
FIG. 12 is a perspective view showing a shutter slat 10 according to Embodiment 6 of the present invention. Note that the same or equivalent parts as those in the first to fifth embodiments will be described using the same reference numerals. In the first embodiment, it has been described that the expanded diameter portion 4 is provided only in the interlock portion that is in contact with another shutter slat positioned inward or outward along the radial direction D of the pulley 32. In the sixth embodiment, the second interlock portion 3 is formed so as not to contact the slat body of another shutter slat positioned inward or outward along the radial direction D of the pulley 32. A second expanded diameter portion 6 is formed.

  The second expanded diameter portion 6 is provided on both side portions 3 s along the longitudinal direction L of the second interlock portion 3, and the first intermediate portion 3 m along the longitudinal direction L of the second interlock portion 3. The second outer diameter R2 is larger than the outer diameter R1. The second expanded diameter portion 6 is also formed in the same manner as the expanded diameter portion 4 (see Embodiments 1 to 4).

  Next, FIG. 13 is a plan view showing a state in which the shutter slat 10 of FIG. 12 is connected to another shutter slat. Here, as in the first embodiment, one of the plurality of shutter slats 10 is referred to as a first shutter slat 101 and is connected to the first shutter slat 101 and along the circumferential direction C of the pulley 32. The adjacent shutter slats 10 are called second shutter slats 102 (see FIG. 5). That is, FIG. 13 shows a state in which the first and second shutter slats 101 and 102 of FIG. 5 are viewed from the outside in the radial direction D.

  In FIG. 13, the first interlock portion 2 of the first shutter slat 101 and the second interlock portion 3 of the second shutter slat 102 are engaged with each other. The second expanded diameter portion 6 provided in the second interlock portion 3 of the second shutter slat 102 is in contact with the first leg portion 1 b of the first shutter slat 101, and the length of the shutter slats 101, 102 is long. A gap 61 is formed between the first shutter slat 101 and the first leg 1b at an intermediate position 10m along the direction L. That is, the interlock portion formed so as not to contact the slat body of another shutter slat positioned inward or outward along the radial direction D of the pulley 32 is the circumferential direction C of the pulley 32. Is an interlocking portion that is in contact with the adjacent shutter slats. Other configurations are the same as those in the first embodiment.

  In such a shutter slat 10, the second interlock portion 3 formed so as not to contact the slat body of another shutter slat positioned inward or outward along the radial direction D of the pulley 32. Since the second expanded diameter portion 6 is formed, a gap 61 can be formed between the leg portions 1b of the connected shutter slats 101, and only the both sides 10s concealed by the guide rail 50 where the scratches are generated by rubbing. can do.

  In the first to sixth embodiments, the shutter slat 10 is described as having a substantially U-shaped cross section. However, as is well known, the shutter slat has, for example, a more complicated bent shape and a substantially cross-sectional shape. A flat plate or the like may be used.

  Moreover, in FIGS. 1-13 explaining the structure of Embodiment 1-6, it describes so that the expansion part 4 and the 2nd expansion part 6 may be arrange | positioned substantially concentrically with the interlock parts 2 and 3. FIG. However, the axial centers of the enlarged diameter part and the second enlarged diameter part may be shifted from the axial center of the interlock part. That is, the expanded diameter part or the second expanded diameter part may have a shape in which the size of the interlock part is non-uniformly widened, for example, by attaching a sheet member only to a part of the outer periphery of the interlock part.

It is a perspective view which shows the shutter slat by Embodiment 1 of this invention. It is explanatory drawing which shows formation of the enlarged diameter part of FIG. It is a front view which shows the shutter apparatus using the shutter slat of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is a side view which shows the state by which the shutter curtain was wound up by the pulley of FIG. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is a perspective view which shows the shutter slat by Embodiment 2 of this invention. It is a perspective view which shows the shutter slat by Embodiment 3 of this invention. It is a perspective view which shows the shutter slat by Embodiment 4 of this invention. It is a perspective view which shows the shutter slat by Embodiment 5 of this invention. It is sectional drawing of the principal part at the time of the shutter slat of FIG. 10 being piled up along the radial direction of a pulley. It is a perspective view which shows the shutter slat by Embodiment 6 of this invention. FIG. 13 is a plan view showing a state in which the shutter slat of FIG. 12 is connected to another shutter slat. It is a side view which shows the conventional shutter slat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Slat main body 1a Center board part 1b, 1c 1st and 2nd leg part 1m Middle part 1s Both side parts 2,3 1st and 2nd interlock part 2m, 3m Middle part 2s, 3s Both side parts 4 Expansion diameter part 5 Protrusion Part 6 Second expanded diameter part 32 Pulley (winding member)
40 Shutter curtain 65 Projection piece 70 Sheet member 80 Cap member D Radial direction L Longitudinal direction S Short direction T Thickness direction R1, R2 First and second outer diameters

Claims (4)

A longitudinal slat body (1) and a curl shape provided at both ends in the short direction (S) of the slat body (1) and extending along the longitudinal direction (L) of the slat body (1) First and second interlock parts (2, 3),
The first and second interlock portions (2, 3) are engaged with the interlock portions of other shutter slats to form a shutter curtain (40) for opening and closing the entrance and exit, and an upper portion of the entrance and exit. When the shutter curtain (40) is wound on the winding member (32) provided on the winding member (32), at least one of the first and second interlock portions (2, 3) is the winding member (32). A shutter slat formed so as to abut against another shutter slat located inward or outward along the radial direction (D) of
Provided on at least one of the first and second interlock portions (2, 3) in contact with the other shutter slats, on both side portions (2s) along the longitudinal direction (L) of the at least one. A swelled portion (4) which is disposed and has a second outer diameter (R2) larger than the first outer diameter (R1) of the intermediate portion (2m) along the longitudinal direction (L) of the at least one.
Equipped with a,
The swelled portion (4) is formed by expanding the both side portions (2s) .   A longitudinal slat body (1) and a curl shape provided at both ends in the short direction (S) of the slat body (1) and extending along the longitudinal direction (L) of the slat body (1) First and second interlock parts (2, 3),
  The first and second interlock portions (2, 3) are engaged with the interlock portions of other shutter slats to form a shutter curtain (40) for opening and closing the entrance and exit, and an upper portion of the entrance and exit. When the shutter curtain (40) is wound on the winding member (32) provided on the winding member (32), at least one of the first and second interlock portions (2, 3) is the winding member (32). A shutter slat formed so as to abut against another shutter slat located inward or outward along the radial direction (D) of
  Provided on at least one of the first and second interlock portions (2, 3) in contact with the other shutter slats, on both side portions (2s) along the longitudinal direction (L) of the at least one. A swelled portion (4) which is disposed and has a second outer diameter (R2) larger than the first outer diameter (R1) of the intermediate portion (2m) along the longitudinal direction (L) of the at least one.
  With
  The bulged portion (4) is formed by bending a protruding piece (65) extending from the both side portions (2s) along the longitudinal direction (L) so as to overlap the both side portions (2s). A shutter slat characterized by being made. A longitudinal slat body (1) and a curl shape provided at both ends in the short direction (S) of the slat body (1) and extending along the longitudinal direction (L) of the slat body (1) First and second interlock parts (2, 3),
On both sides (2s, 3s) along the longitudinal direction (L) of the first and second interlock portions (2, 3), there are second intermediate portions (2m, 3m) along the longitudinal direction (L). An expanded portion (4, 6) having a second outer diameter (R2) larger than one outer diameter (R1) is provided ,
The swelled portion (4) is formed by expanding the both side portions (2s) .   A longitudinal slat body (1) and a curl shape provided at both ends in the short direction (S) of the slat body (1) and extending along the longitudinal direction (L) of the slat body (1) First and second interlock parts (2, 3),
  On both sides (2s, 3s) along the longitudinal direction (L) of the first and second interlock portions (2, 3), there are second intermediate portions (2m, 3m) along the longitudinal direction (L). An expanded portion (4, 6) having a second outer diameter (R2) larger than one outer diameter (R1) is provided,
  The bulged portion (4) is formed by bending a protruding piece (65) extending from the both side portions (2s) along the longitudinal direction (L) so as to overlap the both side portions (2s). A shutter slat characterized by being made.

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