JPH10159462A - Structure for preventing shutter slat from slipping off - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a structure of a shutter in which the slats can be inexpensively and easily prevented from slipping off. SOLUTION: A plurality of long slats 4 are laterally connected to each other and vertically moved in the condition that both side edges of the slats 4 are fitted in rails 2, 2. Cut and erected pieces 5 which are protruded to the outdoor side and whose end faces 7 are turned to the central side of the slat 7 and whose ridge lines are declined toward the side edge of the slat, are formed near both side edges of the slat 4 inserted in the rail 2, to be caught by the vertically extending projections 11 provided at the outdoor side of the rail, when the slat 4 is about to slip out of the rail 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing a shutter slat of a shutter attached to an entrance or a window of a store or a warehouse from slipping out of a guide rail, and particularly to a structure for preventing the shutter slat from slipping out to the outdoors. .

[0002]

2. Description of the Related Art A shutter is composed of a plurality of shutter slats (hereinafter abbreviated as "slats") which are long in the horizontal direction.
(E.g., a motor, etc., usually arranged above the guide rails), and lifted and lowered by a drive device while fitting both side edges of each slat into the guide rails (hereinafter, abbreviated as rails).
Take up or unwind from the box at the top of the rail. Conventionally, retaining members have been attached near both side edges of a slat fitted to a rail so that the slat does not come off the rail. This retaining member is usually an L-shaped or T-shaped separate member that is hooked on a vertically extending ridge provided on the indoor side of the rail, and is fixed to the slat with a rivet or the like.

[0003]

However, since the above-mentioned retaining member is separately attached to the L-shaped or T-shaped separate member to the slat, it takes a lot of labor and cost for the attaching work.
Further, since the retaining member is attached to the thin slat using a rivet or the like, a force is applied to the attachment portion, and the slat may be damaged.

[0004] In particular, T which protrudes inside the rail in the indoor and outdoor directions.
In order to prevent the slats from interfering with the rails when the slats move up and down the rails, and to prevent the slats from interfering with each other by winding the slats into a box, the projecting portion is reduced, Protrusions must be provided on both outer sides, complicating the structure of the rail and hindering the assemblability of the shutter (it is difficult to fit the slat into the rail). In addition, when the slats are raised and lowered, the retaining members often rub against the ridges, which causes abnormal noise and lacks smoothness of lifting and lowering. Therefore, in order to newly develop an inexpensive and easy means for retaining the slat, the present inventors have studied.

[0005]

As a result of the examination, what has been developed is a shutter in which a plurality of long slats are connected in a horizontal direction, and the slats are raised and lowered with both side edges of the slats being fitted on the rails. Near each side edge of the slat, cut and raised in the outdoor direction, the end face faces the center side of the slat, the cut and raised edge forms a cut and raised that slopes toward the side edge of the slat, and the slat tries to escape from the rail In this case, the slats are prevented from falling out by hanging the cut-and-raised portions on vertically extending ridges provided on the outdoor side in the rail. The cut-and-raised portions are preferably provided on both side edges of a predetermined number of slats so that the cut-and-raised end surfaces face each other. This cut-and-raise does not require a separate retaining material to process the slat itself, and the cut-and-raised ridge line is inclined toward the side edge of the slat, so the cut-and-raised and the slat are continuous In addition, it is hardly damaged by an excessive load.

[0006] The cut-and-raised portion has a cut-off edge for cutting the cut-and-raised end surface in a shape of a circular arc convex toward the center of the slat, and the cut-and-raised end surface is tilted perpendicular to the slat surface or toward the center of the slat. It is good to let. For example, when the slat attempts to escape from the rail to the outdoor side, the slat bends by protruding near the center in the outdoor direction. A cut-and-raised surface having a cut-and-raised end surface perpendicular to the slat surface or inclined to the center of the slat is in contact with or close to a corresponding ridge provided on the outside in the rail in a curved state of the slat. The slats will be hooked in a state, ensuring that the slats will not come off.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a shutter provided with a retaining structure of the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1 (the rail 2 is a virtual line), and FIG. 3 is a cross-sectional view taken along the line BB in FIG. FIG. 4 is a sectional view taken along the line CC in FIG.

The shutter according to the present embodiment is an example of a type provided in a window or the like. As shown in FIG. 1, a box 3 for winding and storing a slat 4 at the upper end of rails 2 erected on the left and right. And driving device (for example, motor, not shown)
Are arranged, and the slats 4 wound in the box 3
Is fed out with both side edges fitted in the rails 2,2.

As shown in FIGS. 2 to 4, the cut-and-raised portion 5 has a cut-and-raised end surface 7 facing the center of the slat 4 at an intermediate portion in the vertical direction close to the slat side edge 6, and is convex toward the outdoor side. The protrusion is cut and raised as described above, and the cross section is formed as a protrusion having a shape in which a substantially conical body is vertically divided by a rotation axis. The forming operation is as simple as cutting the slat 4 by cutting the edge 8 and forming the slat 4 in one step of the conventional slat molding. Can be. The slat surface 9 and the cut-and-raised portion 5 are continuous across the contact point D (see FIG. 3).
When the slats 4 try to get out of the rails 2, the load tends to concentrate near the contact point D. Therefore, by shortening the length a from the slat side edge 6 to the cut-and-raised 5 and increasing the length b of the cut-and-raised 5, the continuity at the contact D is made smoother, and the load on the contact D is increased. It is preferable to reduce the concentration. In addition, the inclination of the cut-and-raised ridge line was made gentler, and the part with the length a was eliminated. In this case, the contact point D is eliminated while ensuring a sufficient amount of protrusion of the cut-and-raised portion 5, so that the problem of load concentration does not occur.

When the cut edge 8 is formed in an arc shape that protrudes toward the center of the slat 4, the cut-and-raised end face 7 is slightly inclined toward the center of the slat 2, as is apparent from FIG. Can be done. Further, in this example, the ridge 11 extending in the vertical direction on the outdoor side inside the rail 2 is tilted toward the side edge side of the slat 2 so as to correspond to the tilting. When the slat 4 is bent as shown in FIG.
The cut-and-raised end face 7 and the ridge 11 can be engaged with each other in a state close to the contact surface. In addition, the ridge 11 in this example is
Mohair pocket for mohair 12 mounted in rail 2
I'm using 13.

In this example, as shown in FIGS.
The flexible range of the slat 4 (see FIGS. 3 and 5) is limited so that when the cut-and-raised end face 7 comes into contact with the ridge 11, the slat side edge 6 comes into contact with the inner surface of the rail 2 at the end point E. I have to. When the slat 4 tries to get out of the rail 2, the slat 4 tries to rotate around the contact point F between the cut-and-raised end face 7 and the ridge 11, but the slat side edge 6 is moved to the inner surface of the rail 2 at the end point E. , The rotation is kept to a minimum range and deformation of the slat 4 is prevented.

The deformation of the slats 4 is most noticeable in the form of bending at the contact point D. However, as described above, when the length a from the slat side edge 6 to the cut-and-raised portion 5 is shortened, and when the length b of the cut-and-raised portion 5 is increased, (1) the slat 4 and the cut-and-raised portion 5 at the contact point D are separated. Since the continuity is ensured, the concentration of the load can be avoided. (2) The slat side edge 6 contacts the inner surface of the rail 2 from the end point E to the contact point D.
The bending at the contact point D can be prevented by reducing the length of the contact point D (see FIG. 5) and reducing the moment about the end point E. In the case of the rail 2 which allows a wide flexible range, the flexible range may be limited by interposing a spacer 14 as shown in FIG.

In the retaining structure according to the present invention, it is preferable that the number of cut-and-raised portions is large, since the load applied to each cut-and-raised portion is small. However, as shown in FIG. Due to 15, deformation of the upper slats 4 when trying to escape is restricted by the box. Therefore, the cut-and-raised portions 5 are preferably provided on the upper and lower slats 4 and provided more on the slats 4 near the middle stage.

[0014]

According to the retaining structure of the present invention, it is possible to take a simple, low-cost, and hard-to-break slat-preventing measure against the slats.
The retaining structure of the present invention is provided on the slat, and does not require a special structure as a ridge in the rail for retaining the cut-and-raise. Therefore, the structure of the rail is simplified, and workability and assemblability are improved. In addition, it has a high effect of reducing costs.

[Brief description of the drawings]

FIG. 1 is a front view of a shutter provided with a retaining structure of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG. 1 (where rails are imaginary lines).

FIG. 3 is a sectional view taken along the line BB in FIG. 2;

FIG. 4 is a sectional view taken along line CC in FIG. 3;

FIG. 5 is a diagram corresponding to FIG. 3 in a state where the shutter expands to the outdoor side due to negative pressure.

FIG. 6 shows a shutter according to the invention using spacers, FIG.
FIG.

[Explanation of symbols]

 2 rail 3 box 4 slat 5 cut and raised 6 slat side edge 7 cut and raised end face 8 cut edge 9 slat face 11 ridge 12 mohair 13 mohair pocket 14 spacer 15 bottom slat

Claims (2)

[Claims] 1. A shutter in which a plurality of shutter slats which are long in the horizontal direction are connected to each other, and which move up and down in a state where both side edges of the shutter slat are fitted into a guide rail, respectively, near each side edge of the shutter slat fitted into the guide rail. When the cut-and-raised end face faces the center side of the shutter slat, and the cut-and-raised ridge line forms a cut-and-raised slope toward the side edge side of the shutter slat, when the shutter slat tries to escape from the guide rail, A vertical ridge provided on the outdoor side in the guide rail, the cut-and-raised portion is hung, and the shutter slat is prevented from falling off. 2. A cut edge that cuts and raises a cut-and-raised end surface has a circular arc shape protruding toward a center side of the shutter slat, and the cut and raised end surface is tilted perpendicular to the shutter slat surface or toward a central side of the shutter slat. The shutter slat retaining structure according to claim 1, wherein