JPH048593B2 - - Google Patents

Abstract

A vertically movable door curtain has a plurality of parallel restraining bars (19) affixed to its marginal edges, each bar being movable within a guide channel 6 and engageable with inwardly directed locking flanges (9), thereby to hold the curtain against withdrawal from the guide channels when the curtain is strained by wind forces. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll-up shutter closed by a roll-up door curtain, such as a slat shutter or a continuous shutter.

Note that the door curtain in this specification refers to a curtain-shaped door that can be rolled up and retracted vertically guided by a guide of a roll-up shutter, and includes a slat shutter in which a number of slats are connected, 1 The concept includes door curtains made of continuous sheets of books (as shown in Figures 1-3), or anything similar thereto.

When the door curtains are closed, their vertical side edges are formed by, for example, two U-shaped panels on either side of the doorway that open toward the other and extend vertically. It is held by a guide such as a letter-shaped guide groove. In normal cases, it is sufficient that the door curtains are assembled in the generally accepted style. However, when such a combination is exposed to strong winds, the door curtain tends to bow inward or outward, causing both side edges to gradually move toward the center and eventually come off the guide groove. There is. In such a case, the curtain would be completely torn off, leaving the doorway unprotected while the door itself would become a safety hazard.

The present invention provides these door curtains with wind pressure resistance sufficient to withstand strong winds. Roll-up shutters usually include means for locking each side edge of the door curtain to respective vertical guides so that the side edges of the door curtain can flex by a preset amount without tearing from the guides. (For example, a flange that protrudes inward from the free end of the side wall to narrow the inner width of the guide groove.)

On the other hand, for door curtains with relatively high rigidity, protrusions are fixed to the side edges of the door curtains.
37334 Publication), by bending the side edges (Utility Model Application Publication No. 3770 of 1947), or by providing engaging protrusions that can be freely retracted (Utility Model Application Publication No. 1639 of 1937). It is known that the locking effect is ensured by engaging with a flange formed on the flange.

However, when protrusions are provided on the side edges of the door curtain, while the engagement becomes more secure, the insertion process is difficult, and strong force is applied to the protrusions locally, causing them to break or become irreversible. It may become bent and become unusable.

The present invention provides a shutter that allows door curtains with relatively low rigidity to undergo elastic deformation when exposed to strong winds, but prevents large forces from being applied locally, thereby successfully avoiding the worst case scenario of the door being torn off. is intended to provide.

In the shutter of the present invention, in order to more securely hold the side edges of the door curtain within the respective vertical guides, an engagement bar is provided which can be engaged with said means and further has elasticity. It has a (elastically deformable) sliding member.

That is, the present invention provides: (A) side walls forming U-shaped grooves that are fixed vertically to opposite sides of the doorway and open toward each other to insert the side edges of the door curtain; , a pair of guides having a locking flange protruding at or near the free end of the side wall so as to narrow the inner width of the free end; A roll-up shutter having a door curtain that is slidably guided; (D) along both side edges of said door curtain, at some distance from said side edges, and on one or both sides of said door curtain; (E) on both sides of each side edge of said door curtain and closer to the side edge of said door curtain than said engagement bar; A band-shaped elastic sliding member is provided to be slidably inserted into the narrow part of the groove of the guide, and (F) in a normal state, the engagement bar is closer to the groove than the locking flange. is movable vertically and in the width direction of the door curtain on the back side; (G) the dimension from the surface of the engagement bar to the other surface of the door curtain to which the engagement bar is not fixed;
or when engagement bars are provided on both sides of the door curtain, the dimension from the surface of the engagement bar to the surface of the engagement bar on the other side is smaller than the inner width of the engagement flange, (H) and the The height of the engagement bar is such that when the door curtain is deflected by wind pressure, the engagement bar engages with either one of the locking flanges, thereby preventing the door curtain deflected by wind pressure from being pulled out from the guide. The idea is to provide a wind-resistant wind-up shutter with sufficient dimensions to hold the shutter in place.

Next, preferred embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a plan sectional view of an essential part of an embodiment of the wind-resistant wind-up shutter according to the present invention, and shows a door curtain in a stationary state, that is, in an unflexed state.

FIG. 2 is a plan sectional view of the main part of the shutter, which is the same as FIG. 1, and shows a state in which the door curtain is bent.

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 1 or 2. FIG.

As shown in FIG. 1, the shutter of the present invention has a door curtain 4, each vertical side edge 5 of which has a vertical guide groove 6 fixed to a door post 7 at the entrance. Supported by. The guide groove 6 is fixed to the door post 7 by locking a mounting flange 8 provided along the guide groove 6 with a suitable means such as a bolt.

Each guide groove 6 usually has a U-shaped cross-section, and the free end 10 of the U-shaped guide groove 6
is provided with a locking flange 9 facing inward so as to narrow the width of the guide groove 6. Guide groove 6
It includes a narrow part 6A at the back and a wide part 6B following it, and the wide part 6A is adjacent to the locking flange 9.

In FIG. 1, the shutter is shown in its normal state, with the side edges 5 of the door curtain 4 each nestled in a guide groove 6. The door curtain 4 has a well-known wave shape as clearly shown in FIG.
1 and 12 are provided. Furthermore, the side edge 5 has a T
A plurality of engagement bar units 13 are provided which are shaped like aluminum extrusions. The engagement bar unit 13 is attached, for example, by rivets 14, to the inside 16 of the door curtain 4, that is to say to the adjacent peaks 15 of the corrugations on the inside of the building.
If necessary, the engagement bar unit 13 may also be provided on the outside 17 of the door curtain 4, that is, on the outside of the building. In that case, the maximum horizontal dimension of the door curtain, that is, when the engagement bar unit 13 is provided only on one side, the engagement bar unit 1
dimension from the surface of the rising flange 19 of No. 3 to the surface of the other side of the door curtain 4 (if the engagement bar units 13 are provided on both sides of the door curtain 4, the dimension between the rising flanges of the outer and inner engagement bar units 13) 19) is made smaller than the gap between the locking flanges 9 facing inward. However, the engagement bar unit 1
The height of the rising flange 19 of No. 3 needs to be large enough to be sufficiently engaged with one engagement bar of the locking flange 9 when the door curtain 4 is bent by wind pressure.

The engagement bar unit 13 includes a band-shaped sliding member 11,
12 and is further arranged inside the U-shaped guide groove 6 and the parallel guide groove 6. Each engagement bar unit 13 has a flat web 1
8 and a rising flange 19. Each rising flange 19 constitutes an engagement bar and extends parallel to the guide groove 6. Furthermore, the rising flange 19 of the engagement bar unit 13 provided on the top part 15 of the adjacent waveform
They are arranged in a line. The rising flange 19 protrudes so as to narrow the width of the guide groove when the door curtain 4 is bowed by wind pressure and one sliding member is elastically compressed, as shown in FIG. The locking flange 9 is formed with sufficient dimensions to engage with the inner surface of the locking flange 9. Thereby, the side edge 5 of the door curtain 4 is held within the guide groove 6.

In another embodiment, instead of the engagement bar units 13 being arranged separately along one side edge 5 of the door curtain 4 as described above, the engagement bar units 13 may be arranged, for example, across the corrugated troughs 20 from the top 15. An engagement bar consisting of one continuous elongated piece extending to the top 15 may also be employed.

Although the present invention has been described above based on specific embodiments, the shutter of the present invention is not limited to these embodiments, and can be modified into various shapes.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of the main part showing an embodiment of the wind-resistant winding shutter of the present invention, FIG. 2 is a plan sectional view of the main part showing the shutter shown in FIG. 1 in a bent state, FIG. 3 is a sectional view taken along the line 3-3 of FIG. 1 or 2. (Main symbols in the drawing), 4: Door shutter,
5: Side edge, 6: Groove, 8: Mounting flange, 9:
Locking flange, 13: Engagement bar unit, 18:
Web, 19: Standing flange.

Claims (1)

[Scope of Claims] 1 (A) U-shaped grooves that are fixed vertically to opposite sides of the doorway and open toward each other for insertion of the side edges of the door curtain. (B) a pair of guides having a side wall and a locking flange protruding at or near a free end of the side wall so as to narrow the inner width of the free end; A roll-up shutter having a door curtain that is slidably guided in a vertical direction, wherein (C) a U-shaped groove of the guide has a narrow part on the back side of the groove and a narrow part of the guide; (D) along both side edges of said door curtain at some distance from said side edges and on one side of said door curtain; (E) on both sides of each side edge of said door curtain and closer to the edge of the door curtain than said engagement bar in the normal state; (F) In a normal state, the engaging bar is lower than the locking flange. movable in the vertical direction and in the width direction of the door curtain on the back side of the groove; (G) the dimension from the surface of the engagement bar to the other surface of the door curtain to which the engagement bar is not fixed;
or when engagement bars are provided on both sides of the door curtain, the dimension from the surface of the engagement bar to the surface of the engagement bar on the other side is smaller than the inner width of the engagement flange, (H) and The height of the engagement bar is such that when the door curtain is deflected by wind pressure, the engagement bar engages with either one of the locking flanges, whereby the door curtain deflected by wind pressure is pulled out from the guide. A wind-resistant wind-up shutter that is large enough to hold the windshield in place. 2. The wind pressure-resistant roll-up shutter according to claim 1, wherein the door curtain is a corrugated plate, and the engagement bar is fixed to each adjacent top of the corrugated plate. 3. The wind pressure-resistant wind-up shutter according to claim 1, wherein the engagement bar is fixed to both sides of the door curtain. 4. The wind pressure-resistant wind-up shutter according to claim 1, wherein each of the engagement bars comprises one continuous long piece. 5. The wind pressure-resistant winding shutter according to claim 1, wherein the engagement bar is configured to have a T-shaped cross section from a web and a rising flange. 6. The wind pressure-resistant winding shutter according to claim 5, wherein the thickness of the rising flange is thinner than the thickness of the web.