JPH0678594U - Push-up prevention device for grill shutter - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a device that can prevent the opening of the grill shutter without using a special device such as an electromagnetic opening / closing control device. [Structure] Notches 4 are provided on both side edges of the guide groove near the upper end of the guide rails 3 standing upright and left sides of the lattice slats, and horizontal pipes of the slats pushed up from below are caught in these notches. So that it does not come off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a push-up prevention device for a grill shutter, which is composed of latticed slats so that the inside can be seen.

[0002]

[Prior art]

 As shown in FIG. 4, the grill shutter to which the present invention is directed is configured such that a plurality of core pipes 1 laid in parallel are bendable by a plurality of rows of connecting links 2 arranged in parallel in a direction orthogonal to the core pipes 1. Connected to form a lattice slat, the joint of core pipe 1 and connecting link 2 slides in the guide grooves of guide rails 3 erected on both sides of the attached part of the building to open and close the shutter. To do. At the time of opening and closing, the grid-shaped slats suspended above the winding drum 5 are normally or reversely rotated.

Since such a grill shutter having a lattice-shaped slat is generally small and lightweight, there is a risk that the grill shutter may be lifted by hand from the outside to be opened. Therefore, there is a need for a locking device to prevent the shutter from being opened and closed for crime prevention. As shutters equipped with this type of locking device, Japanese Utility Model Publication No. 61-7334 and Japanese Utility Model Publication No. 2-14610 have been proposed. The former is one in which a lock is installed between two core pipes that are adjacent to each other at both left and right ends of the middle height position of the shutter, and by locking this lock, the lattice-shaped slat is fixed to the guide rail.

In the latter, the latch bar protruding into the guide rail is provided at both sides of the lower part of the shutter, the bifurcated member that engages with the latch bar by the vertical movement of the shutter, and the rotational movement of the bifurcated member is restricted. When the shutter is lowered, the latch bar comes into contact with the bifurcated member and, while pivoting, falls into the recessed portion of the bifurcated member, the bifurcated member is locked by the ratchet wheel and the latch bar is provided. The up-and-down path of the shutter is closed, and the blocking piece that electromagnetically blocks the rotation of the ratchet wheel is separated from the ratchet wheel in conjunction with the release operation of the shutter switch to unlock the bifurcated member. Is.

[0005]

[Problems to be solved by the device]

 Each of the above conventional devices has the following drawbacks. That is, the former has a drawback that it requires manpower for locking and unlocking, and the latter has a drawback that an electromagnetic opening / closing control device for the locking device is required in addition to the drive device for the winding drum.

[0006]

[Means for Solving the Problems]

 In order to solve the drawbacks of the prior art, the present invention forcibly pushes up the lattice slat from below without using a special device, and the lattice slat breaks into a dogleg shape and becomes a notch in the guide rail. The company will provide a device that can prevent it from biting and opening the shutter.

That is, a plurality of core pipes that are laid horizontally in parallel are flexibly connected by a plurality of rows of connection links arranged in parallel in a direction orthogonal to the core pipes to form a grid slat. In the shutter, in the vicinity of the upper end of the guide rails that are erected on both sides of the mounted portion of the shutter, install the core pipe on both side edge faces facing the guide groove where the end of the core pipe slides in the vertical direction. It has a notch to make it depressed.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a grille shutter equipped with the device of the present invention. The guide groove of the guide rails 3 standing upright on both sides of the portion to which the grille shutter is attached at the opening of the building is connected to the core pipe 1. The coupling part of the link 2 slides up and down. The gist of the present invention is to provide notches 4 on both side edge surfaces 6 of a guide groove along which the end of the core pipe slides in the vertical direction near the upper end of the guide rail.

FIG. 2 shows the details of the notch 4 and its action. When the lattice-shaped slat descends, it is in a suspended state, and if the slat sways, the core pipe 1a is temporarily notched. Even if you try to enter into No. 4, it will slide down along the lower edge slope of the notch 4, so there is no hindrance to the descending motion. However, if the slat is forcibly pushed up from the bottom when the shutter is closed, the upper part of the shutter is locked by the take-up drum, the opening and closing machine, etc., so near the upper end of the guide rail 3 near the ceiling part. As shown in the figure, the connecting links 2a and 2b always bend to either side of the opposite side edges. Therefore, the core pipe 1a falls into the notch 4. Moreover, the stronger the pushing force from the bottom is, the closer the core pipe 1a is to the upper edge ring of the notch 4 and the more it does not escape to the outside of the notch. Therefore, it is impossible to open the grill shutter once closed by pushing it up from below the position of the notch 4.

When the slats are raised by the take-up drum 5, the connecting links 2a and 2b rise in a straight line with respect to each other and temporarily sway, so that the side surface of the core pipe 1a moves to the upper edge of the notch 4. Even if it is touched, the force acts in the direction to return it to the center of the guide groove, so that the core pipe 1a does not fall into the notch 4, and therefore there is no hindrance to the rising operation of the slat.

The notch of the present invention is not limited to the shape of the illustrated embodiment, but may have a deformed arc shape, an unequal triangle shape, or a square shape as shown in FIG.

[0012]

[Effect of device]

 As described above, according to the grill shutter of the present invention, the notch 4 is provided near the upper end of the guide rail 3 near the ceiling, and the core pipe near the ceiling cannot be easily touched from the outside. Therefore, it is possible to prevent the intentional lifting of the shutter by hand such as mischief, and the purpose of theft prevention can be achieved. Moreover, it is highly effective in practice because it does not require any special mechanism or control by simply providing notches on both side edges of the guide groove of the guide rail.

[Brief description of drawings]

FIG. 1 is a side view of a grill shutter according to the present invention.

FIG. 2 is an explanatory view of details and actions of a notch according to the present invention.

FIG. 3 is an explanatory diagram showing a modified example of a notch.

FIG. 4 is a front view of a grill shutter using lattice-shaped slats.

[Explanation of symbols]

 1 core pipe 2 connecting link 3 guide rail 4 notch 5 winding drum 6 both side edge surfaces

Claims (1)

[Scope of utility model registration request] 1. A plurality of core pipes which are horizontally installed in parallel,
In a grill shutter in which a plurality of rows of connecting links arranged in parallel to each other in a direction orthogonal to this are flexibly connected to form a grid slat, guide rails installed upright on both sides of an attached portion of the shutter. A push-up prevention device for a grill shutter, characterized in that a notch for allowing the core pipe to fall is provided in both side edge surfaces of a guide groove where the end portion of the core pipe slides in the vertical direction in the vicinity of the upper end, facing each other. apparatus.