JPH085275Y2 - Shutter device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shutter device, and more particularly to a shutter device that prevents a slat, which is formed by extrusion molding aluminum, from being pulled out.

(Prior Art) Conventionally, as a shutter device of this type, for example,
As described in Japanese Utility Model Laid-Open No. 59-190893, each slat for a shutter is, for example, a long slat material formed by extruding aluminum with a predetermined length corresponding to a frontage. When a shutter is formed by cutting the slat according to the height of the frontage, the curls formed at both ends in the width direction of each slat are inserted in the length direction from each other, and the curls are sequentially moved up and down. A structure is known in which the slat retaining pieces are connected to each other in a direction, abut the slat retaining pieces against the cut end of the slat, and fasten tapping screws from the upper and lower insertion holes of the slat retaining pieces to the upper and lower tapping holes of the slat.

(Problems to be Solved by the Invention) In the structure described in the publication, each slat that constitutes the shutter cuts a long slat material into a predetermined length, and cuts the slat material at each curl portion. Since they are connected, a cutting tolerance will inevitably occur at both cutting ends of each slat, and when the slat retaining pieces are brought into contact with the cutting ends of adjacent slats and tightened with tapping screws, tightening Is too strong, the end portion of the slat retaining piece is deformed by the step due to the cutting tolerance and presses against the curl portion to prevent rotation of the curl portion.
Smooth rotation cannot be obtained, and if the tightening is too weak, the curl portion can be smoothly rotated, but a sufficient tightening torque cannot be obtained by the tapping screw, which causes a problem that the tapping screw is loosened.

Therefore, the present invention has been made in view of such a problem, and enables the slat retaining piece to be fastened with a sufficient tightening torque without being affected by the cutting tolerances of the slats. SUMMARY OF THE INVENTION It is an object of the present invention to provide a shutter device in which the curl portion of the device can always be smoothly rotated and the loosening of screws can be prevented.

(Means for Solving the Problems) A shutter device of the present invention comprises a plurality of slats in which curl portions cut at a predetermined length and formed at both ends in the width direction are rotatably fitted to each other and connected in the vertical direction. And a slat retaining piece having upper and lower retaining portions for preventing curl portions which are abutted against both cutting ends of every other slat in the vertical direction and which are inserted into each other, and the slat retaining pieces are fixed to the slats. Each of the slats has an upper piece and a lower piece at both ends in the width direction, and tapping holes for press-fitting the screw are respectively provided on the inner side of the upper piece and the lower piece. Formed, the slat retaining piece,
Inserting holes for screwing are formed near the upper and lower stoppers and communicate with the upper and lower tapping holes of the slat, respectively, and the opening of the tapping hole is formed at the inner opening edge of the upper and lower inserting holes. The engaging projections are provided so as to abut against the ends and absorb the cutting tolerance between the slats.

(Operation) In the shutter device of the present invention, the slat retaining pieces are respectively brought into contact with both cutting ends of every other slat in the vertical direction among the plurality of slats that are connected in the vertical direction. Screws are press-fitted into the upper and lower tapping holes of the slat from the upper and lower insertion holes and fastened.

Then, by tightening the upper and lower screws, the upper and lower engaging projecting edges of the slat retaining pieces are in contact with the open ends of the upper and lower tapping holes, and the slat retaining pieces are attached to both cutting ends of the slats. The slat retaining pieces are fastened with sufficient tightening torque, and the upper and lower retaining portions of the slat retaining pieces are respectively brought into contact with the upper and lower curl portions of the slats which are inserted into each other, and the upper and lower retaining portions rotate together. The slats that are movably linked are prevented from slipping off from each other.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 is a shutter, and this shutter 1 is constituted by connecting a large number of slats 2 in the vertical direction. Each slat 2 is formed by cutting a long slat material obtained by extruding aluminum by an extrusion molding method into a predetermined length.

Each of the slats 2 has a cross section in which a hollow portion 7 is formed by an inner plate 3 and an outer plate 4, and upper and lower pieces 5 and 6 integrally formed between upper and lower ends of the inner plate 3 and the outer plate 4 in the width direction. The slat main body 8 is formed in a flat shape, and the slat main body 8 has a lower end portion of the inner plate 3 which is positioned below the lower piece 6 and has a substantially semicircular shape curled upward and outward. A small-diameter curl portion 9 is continuously formed along the length direction thereof, and a substantially semi-circular large-diameter portion that is positioned above the upper piece 5 and curls downward inward at the upper end portion of the outer plate 4. The curl portion 10 is continuously molded along its length direction.

Further, tapping holes 11 and 12 each having a substantially semicircular small diameter are continuously formed in the inner portions of the upper piece 5 and the lower piece 6 so as to face each other along the length direction.

Further, 13 is a slat retaining piece that abuts the cut ends 14 at both ends in the longitudinal direction of the slat 2, and the slat retaining piece 13 is, as shown in FIG. 3 and FIG. The hollow portion 7 is formed in a narrow width plate shape having a width that closes the cut end portion 14 and a length that abuts the cut end portions 14 of the upper and lower curl portions 9 and 10 of the slat 2.

Further, the upper and lower portions of the slat retaining piece 13 are retaining portions 15 and 1 which come into contact with upper and lower curl portions 9 and 10 of the slat 2.
6 are respectively formed, and insertion holes 17 and 18 communicating with the upper and lower tapping holes 11 and 12 are formed in the vicinity of the inner side of the upper and lower retaining portions 15 and 16, respectively.

Further, at the inner opening edge portions of the upper and lower insertion holes 17 and 18, there are annular engaging projections 21 and 22 that abut the opening ends 19 and 20 formed of the cut end portions 14 of the upper and lower tapping holes 11 and 12. Each is projected.

Further, 23 is an insertion hole 1 above and below the slat retaining piece 13.
These are screws that are press-fitted into the upper and lower tapping holes 11 and 12 from 7, 18 by screwing.

In this structure, a large number of slats 2 are rotatably connected to each other by inserting the large and small curl portions 9 and 10 formed in the respective width directions, that is, the upper and lower end portions, from each other in the longitudinal direction. The slats 2 are connected to each other in such a manner that the curls 9 and 10 of large and small sizes are sequentially rotatable in the vertical direction.

In addition, cut ends 14 at both ends of each slat 2 in the length direction
And every other slat 2 up and down.
The slat retaining pieces 13 are brought into contact with the cut ends 14 of both ends of the slat 2, and the screws 23 are screwed into the upper and lower tapping holes 11 and 12 of the slat 2 from the upper and lower insertion holes 17 and 18 of the respective slat retaining pieces 13. Press in and tighten.

Then, by fastening the upper and lower screws 23, the upper and lower engaging projection edges 21 and 22 of each slat retaining piece 13 abut on the open ends 19 and 20 formed by the cut end portions 14 of the upper and lower tapping holes 11 and 12. In this state, each slat retaining piece 13 is press-fitted and locked to both cutting ends 14 of each slat 2 with a sufficient tightening torque of a screw 23, and the upper and lower retaining portions of each slat retaining piece 13 are tightened. At least one upper and lower curl portion of the upper and lower curl portions 9 and 10 of the slat 2 in which 15 and 16 are fitted to each other.
The upper and lower curl portions 9 and 10 are respectively brought into contact with the cut end portions 14 of the 9, 10 while being blocked.

Therefore, each slat retaining piece 13 is fixed to the slat 2 by absorbing the cutting tolerances 14a and 14b at the mutual cutting ends 14 of the upper and lower slats 2 which are connected to each other by the upper and lower engaging projections 21 and 22. And the retaining parts above and below
The slats 2 are retained by the retaining action of the curls 9 and 10 by the curls 15 and 16, and the slats 2 are smoothly rotated in the curls 9 and 10.

(Effects of the Invention) According to the present invention, through holes for screw insertion are formed above and below the slat retaining piece, which communicate with the upper and lower tapping holes of the slat. Since the engaging projection edges that abut the opening ends of the tapping holes of the slats absorb the cutting tolerances of the slats, the upper and lower engagement projection edges do not affect the cutting tolerances of the slats and the slat retaining pieces are not affected. Can be fastened to the slat with sufficient tightening torque. Therefore, the curls of the slats are always smoothly rotated, and the screws are press-fitted with a sufficient tightening torque, so that the loosening of the screws can be reliably prevented, and the slats are prevented from moving up and down. It is possible to reliably prevent the curl portions that are fitted to each other at the retaining portions from being removed.

Also, since the slat retaining pieces are fixed to both cutting ends of every other slat in the vertical direction, the number of slat retaining pieces used is significantly larger than the one in which the slat retaining pieces are fixed to both cutting ends of each slat. Can be reduced to
It is possible to reduce the man-hours and the number of steps for connecting the slats to form the shutter and to contribute to the improvement of productivity, and to significantly reduce the cost.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of a part of a shutter device, FIG. 2 is a side view of the same, FIG. 3 is a front view of a slat retaining piece, and FIG. It is a side view same as the above. 2 ... slat, 5 ... upper piece, 6 ... lower piece, 9,10 ...
… Curl part, 11,12 …… Tapping hole, 13 …… Slat retaining piece, 14 …… Cutting edge, 14a, 14b …… Cutting tolerance, 1
5,16 …… Prevention part, 17,18 …… Insertion hole, 19,20 …… Opening end,
21,22 …… Engagement edge, 23 …… Screw.

Claims (1)

[Scope of utility model registration request] 1. A plurality of slats in which curl portions cut at a predetermined length and formed at both ends in the width direction are rotatably fitted to each other and connected in the vertical direction, and a slat every other vertical direction. The slats are provided with upper and lower slats retaining pieces for retaining curls which are abutted against both cutting ends and fitted to each other, and screws for fastening the slats retaining pieces to the slats. Has upper pieces and lower pieces at both ends in the width direction, and tapping holes for press-fitting the screws are formed inside the upper pieces and the lower pieces, respectively. The insertion holes for screw insertion, which are located in the vicinity of the retaining portion of the slat and communicate with the upper and lower tapping holes of the slat, and the inner ends of the upper and lower insertion holes have opening ends of the tapping holes. It abuts the shutter device being characterized in that respectively protrude the engaging flange that absorbs the cutting tolerance of said slats each other.