JPH11182164A - Lift preventing device of motor-driven grille shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a life preventing device for motor-driven grille shutter, which can easily hinder the shutter member from rising when the shutter member is lifted from the external side. SOLUTION: In the condition that a shutter curtain 5 is closed, one of the shutter members 7A located in a shutter case 2 is equipped with an luck tool 10 which is energized rotationally to one side. In the shutter case, a rotor 16 is pivoted having an engage pawl 16A which is rotationally energized so as to be engaged with the lock tool from above, and when the shutter curtain rises and falls as the opening/closing motions, the pawl on the rotor admits a rising/falling motion of the lock tool in a single piece with the shutter curtain, and when pushing up the shutter curtain from below, the pawl is engaged with the lock tool owing to the inclining motion of the lock tool toward the rotor so that the shutter curtain is hindered from rising.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric grill shutter lifting prevention device for preventing a shutter curtain from being lifted from the outside in a closed state.

[0002]

2. Description of the Related Art An electric grill shutter comprises a grille-shaped shutter curtain formed by connecting shutter members each having a rod-like shape to each other through a link.
The drive control of the electric motor raises and lowers both ends of the shutter member along the guide rail, and opens and closes the shutter curtain. Locking in closing and holding the shutter curtain is performed by a brake mechanism built in the electric motor that opens and closes (elevates) the curtain, and the rotation of a winding drum that winds the shutter curtain is controlled. Inhibits the shutter curtain from easily rising.

[0003]

However, the above-mentioned electric grill shutter has a structure in which the shutter members are connected to each other by a link. Therefore, when the opening of the building is closed, a hand is placed on the lower portion of the shutter curtain from outside. When lifted up, each link is bent due to play in the guide rail that guides the end of each shutter member and in the continuous shutter case, and the front shutter curtain rises with a considerable width. Problems arise.

[0004] Particularly, in the shutter case, a considerable space is provided between the winding drum and the upper end of the guide rail in order to secure a margin for winding the curtain. When the shutter is lifted from above, the lower end easily rises in spite of the operation of the brake mechanism, which not only causes a failure in the shutter case but also poses a problem in crime prevention.

[0005] The present invention has been made based on the above circumstances, and an object thereof is to provide a locking member on a shutter member located in a shutter case when the shutter member is lifted from the outside. An object of the present invention is to provide an electric grill shutter lifting prevention device which is devised so that the shutter member can easily be prevented from being lifted by engagement of the shutter member with a locking claw on the shutter case side.

[0006]

Therefore, in the present invention,
As is apparent from the illustrated embodiment, the shutter curtain 5 having a structure in which the shutter members 7 each having a rod-like shape are connected to each other via the link 8 in order to prevent the shutter curtain 5 from being lifted from the outside in the closed state. When the shutter curtain 5 is closed, the shutter case 2
One of the shutter members 7 </ b> A located inside the shutter member 2 is provided with a locking member 10 that is urged to rotate to one side, and is engaged with the locking member 10 from above in the shutter case 2. A rotor 16 having an engagement claw 16A that is rotationally urged is pivotally supported, and when the shutter curtain 5 is opened and closed, the engagement claw 16A of the rotor 16 is engaged with the locking tool 10 integrated with the shutter curtain 5. When the lifting and lowering movement is allowed and the shutter curtain 5 is pushed up and raised from below, the engaging claw 16A of the rotor 16 is engaged with the locking tool 10 by the tilting of the locking tool 10 toward the rotor 16. And the shutter curtain 5 is prevented from rising.

More specifically, a shutter member 7C located above one of the shutter members 7A provided with the locking member 10 has a portion corresponding to the upper portion of the locking member 10 as the shutter member 7C. And a partial member 7C-2 separated from the main body portion 7C-1. One of the shutter members 7A and the partial member 7C-2 form a locking operation link 20 on the side of the locking tool 10. Connected through
Further, the partial member 7C-2 and the shutter member 7B located above the partial member 7C-2 are connected via a guide link 13 having a long hole 13A for guiding the partial member 7C-2 up and down, and the shutter case is provided. 2, a rotor 16 having an engagement claw 16 </ b> A pivotally urged to engage with the locking tool 10 from above is pivotally supported. Due to its own weight, the partial member 7C-2 is moved by the guide link 13
The guide link 13 is located at the lower end in the long hole 13A.
And holding the link 20 for locking operation in a substantially vertical state, and engaging the locking tool 10 that rotates while being engaged with the link 20 for locking operation with the engaging claw 16A of the rotor 16.
Faces the position that allows the lifting and lowering movement of the locking tool 10,
When the shutter curtain 5 is lifted up from below, the partial member 7C-2 is positioned at the upper end of the elongated hole 13A of the guide link 13 to move the guide link 13 and the locking link 20 to the rotor. 16 engaging claws 16
The latching tool 10, which is held in a substantially L-shape in the direction of the arrow A and rotates while being engaged with the link for locking operation 20, has the engaging claw 16 A of the rotor 16 upward. And prevents the shutter curtain 5 from rising.

In such a configuration, when the user lifts the shutter curtain 5 from outside by putting his or her hand on the lower portion thereof, the shutter member 7A is slightly lifted by the lifting force from the lower side thereof, and is raised. Long hole 1 of link 13
The partial member 7C-2 constituting the upper link pin of the locking operation link 20 is moved upward within 3A. As a result, the locking operation link 20 is rotated and deflected integrally with the locking tool 10, so that the locking tool 10 is engaged with the engaging claw 16A. As a result, the shutter curtain 5 is lifted. Can be blocked. The same operation is performed without the slot 13A.

In the above configuration, the following configuration shown in FIG. 3 can be adopted. That is, the lock 10
And the lower part of the link 20 for locking operation is pivotally supported by a link pin 11 which constitutes a part of one of the shutter members 7A. A spring 9 made of a coil spring that is urged to rotate is provided in a wound shape, and a stopper member 10A that is fixed to the locking member 10 by the elasticity of the spring 9 and protrudes laterally is used for the locking operation. The link 20 is resiliently pressed and engaged with the surface of the link 20 opposite to the surface facing the rotor 16, and the link pin 11 is connected to the notch of one of the shutter members 7A so as to be continuous.

With such a configuration, the locking members 10 constituting the main operating members of the lifting prevention device,
The stopper member 10A, the locking operation link 20 and the spring 9 are integrated into a unit around the link pin 11, and the guide link 13 and the locking operation link 20 are also integrated into the above-described unit as necessary. It can be mounted in the notch of the member 7A. Thereby, assembly adjustment of each member becomes easy. The guide link 13 may not have the above-mentioned long hole, but the provision of the long hole ensures the tilting operation of the partial member 7C-2 in the direction of the engaging claw 16A.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown schematically in FIG. 1, an electric grill shutter 1 according to the present invention has a shutter case 2 provided horizontally on an upper edge of a building opening A or the like. As shown in the figure, the winding drum 3 is axially supported, and the winding drum 3 is driven in the forward and reverse rotation directions by an electric motor 4 disposed in the case. The shutter curtain 5 connected to the ram 3 is wound up or rewound. The opening and closing of the shutter curtain 5 is performed by moving both ends of the shutter curtain 5 up and down in guide rails 6 erected on both sides of the opening.

The shutter curtain 5 includes a shutter member 7 formed of a rod-like elongated body such as a hollow pipe, and a link 8 connecting the shutter members 7. Are vertically arranged at predetermined intervals in a horizontal posture, and are slidably supported back and forth in a state where both ends thereof are inserted into the guide rails 6 and guided vertically.

In particular, in the present invention, as shown in FIGS. 2 and 3, one of the shutter members 7 (indicated by reference numeral 7A in the figure) located in the shutter case 2 when the shutter curtain is closed. A plate-shaped locking member 10 which is biased by being rotated in one direction (in the direction of a rotor 16 to be described later) by a spring pressure (in this embodiment, a spring pressure of a spring 9 composed of a coil spring), Lower ends of the pair of locking links 20 are pivotally supported. The spring 9 is composed of a pair of left and right coil springs wound around the outer periphery of the right and left shutter members 7 </ b> A, one end of which is fixed to the locking links 20, 20, and the other end of which is the locking member 10.
Of the rotor 16 on the opposite side. In this embodiment, the shutter member 7A is composed of hollow members 70 and 71 that are divided into two parts on the left and right, and a link pin 11 that connects the left and right members 70 and 71 concentrically has both ends of both members 70, 71. , 71 and both members 7
0 and 71 are connected. The locking tool 10, the left and right springs 9 and the right and left locking operation link 20
1 are provided as a unit.

A shutter member 7C, which is located above one of the shutter members 7A provided with the locking member 10, is
The part corresponding to the upper part of the locking member 10 is the shutter member 7.
Partial member 7C-2 separated from body part 7C-1 of C
One of the shutter members 7A and the partial member 7C-2 are connected via a pair of left and right locking operation links 20 on the side of the locking tool 10, and further, the partial member 7C-2 The shutter member 7B located on the upper part is a long hole 13A for guiding the partial member 7C-2 up and down.
Are connected via a guide link 13 having

Further, in the shutter case 2, the gantry 1 is placed on the lintel 14 at a position where the locking tool 10 moves up and down.
5 is provided, and a rotator 16 having an engagement claw 16A that engages with the locking tool 10 from above is pivotally supported on the gantry 15 by its pivot 16B. Further, a spring pressure is applied between the gantry 15 and the rotor 16 by a spring 17 composed of a coil spring disposed around the pivot 16B so that the engaging claw 16A is engaged with the locking tool 10 side. Is urged to rotate.

The base 15 has a pin-shaped stopper 1.
8 and 18 'are provided, and when the shutter curtain 5 is moved up and down, the rotation of the rotor 16 is restricted at a position where the engaging claw 16A is exposed to a position allowing the shutter curtain 5 to pass therethrough.
0 is the spring pressure of the spring 9 and is rotationally biased toward the engaging claw 16A to press the engaging claw 16A.
7, the position where the rotor 16 retreats is regulated.
The engagement state between the engagement claw 16A and the locking tool 10 is maintained.

Next, the operation of the above device will be described. In such a configuration, in the state of FIG. 4 in which the opening of the building is closed by the shutter curtain 5, the load of the shutter curtain 5 is applied to the shutter member 7A. On the other hand, the link 20 for the locking operation is suspended, and as a part of the shutter curtain 5, it is maintained substantially perpendicular to each other. In addition, the stopper 10 has its stopper 10
A is a locking operation link 20 maintaining the above-described substantially vertical state.
And is held in the opposite direction of the engagement claw 16A.

The operation of driving the winding drum 3 from this state to open and close the shutter curtain 5 will be described with reference to FIGS. The shutter curtain 5 always maintains the above-mentioned substantially vertical state due to the load during the opening operation, and the locking member 10 is also slightly inclined in the direction of the rotor 16, but is restricted by the locking operation link 20. As a result, the inclined portion of the locking tool 10 pushes up the engaging claw 16A of the rotor 16 during the upward movement, but the rotor 16 is stopped by the stopper 18. 1 in the middle of rotation before contacting
0 escapes and moves upward, and the shutter curtain 5 is completely upwardly opened.

When the shutter curtain 5, which has been opened upward, is lowered and closed, the locking member 10 comes into contact with the engaging claw 16A of the rotor 16, but the spring 9 moves backward (opposite the rotor 16). Direction) to escape and close down without any problems. Therefore, when the electric motor 4 performs the normal lifting and lowering operation of the shutter curtain 5, there is no hindrance to the up and down operation of the locking tool 10 passing by the side of the engaging claw 16A.

The upward movement when a lifting force is applied to the shutter curtain 5 from the outside in the closed state of FIG. 4 will be described with reference to FIGS. In this case, the long hole 13 of the guide link 13 is provided in the shutter case 2.
The shutter member 7A is raised so that the upper portion member 7C-2 of the locking operation link 20 is raised within A, and the locking tool 10 is locked to the engaging claw 16A (see FIG. 7). At this time, the shutter curtain 5 is bent because the rotation of the winding drum 3 is locked, and the locking link 20 and the guide link 13 move in the direction of the rotor 16 as shown in FIG. The stopper 10A bends by rotating and displacing, and the stopper 10 is elastically pressed by the spring pressure of the spring 9 on the back surface of the stopper link 20 via the stopper member 10A, thereby being integrated with the stopper link 20. As a result, the locking tool 10 is inclined in the direction of the rotor 16 so that the locking tool 10 is
In the state where the rotor 16 is engaged and held, the rotor 16 is rotated against the spring 17 until it abuts against the stopper 18 ′,
The engaging claw 16A engages and holds the locking tool 10 from above.
As a result, the shutter curtain 5 is prevented from rising.

The lifting prevention device mainly composed of the rotor 16 and the locking member 10 may be a single device.
It is preferable to provide the shutter curtain at the center position in the width direction. In addition, a plurality of the above-described lifting prevention devices can be provided. In this case, although it depends on the width of the shutter curtain, in the case of two, it is preferable to provide them near both ends of the width of the shutter curtain. In the case of the number, it is preferable to position at predetermined intervals including positions near both ends of the width. In the lifting prevention device according to the present invention, at least a part of the shutter curtain may be a grill curtain, and the other curtain part may be a slat curtain. For example, like a smoke exhaust shutter, the upper part may be a grill curtain (pipe), and the lower part may be constituted by a slat curtain.

[0022]

As described above, the present invention relates to a device for preventing the lifting of an electric grill shutter, wherein when the shutter curtain is opened and closed, the engaging pawl of the rotor in the shutter case is engaged with the locking member integrated with the shutter curtain. When the shutter curtain is pushed up and raised from below, the engaging claw of the rotor engages with the locking tool due to the tilting of the locking tool toward the rotor, and the shutter curtain rises. The electric grill shutter can be easily lifted and closed when it is closed, and the lower end of the shutter curtain in this type of electric grill shutter is suppressed by a relatively simple and compact structure that does not use electromagnetic force, etc. In addition, it is possible to prevent the shutter curtain from being lifted from outside, which is a security measure. In addition, this lifting prevention device operates effectively even during a power failure, and is excellent in safety.

The locking member 10, the stopper member 10A, the link 20 for locking operation, and the spring 9 constituting the main operating members of the lifting prevention device are assembled into a unit around the link pin 11, and if necessary, further. The guide link 13 and the locking link 20 are also assembled in the above-described unit, and are mounted in the cutouts of the shutter member 7A constituting the curtain of the grill shutter.

[Brief description of the drawings]

FIG. 1 is a front perspective view showing an appearance of an electric grill shutter according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a shutter case portion in a cross section taken along the arrow in FIG.

FIG. 3 is also an enlarged front view showing a shutter curtain lifting prevention structure.

FIG. 4 is an enlarged side view for explaining a lifting prevention function.

FIG. 5 is an enlarged side view for explaining the function.

FIG. 6 is an enlarged side view for explaining the function.

FIG. 7 is an enlarged side view for explaining the function.

FIG. 8 is an enlarged side view for explaining the function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric grill shutter 2 Shutter case 3 Winding drum 4 Electric motor 5 Shutter curtain 6 Guide rail 6A Extension part 7, 7A, 7B, 7C Shutter member 7C-1 Main body part, 7C-2 Partial member 70, 71 Hollow member 8 Link 9 Spring 10 Locking tool, 10A Stopper member 11 Link pin 13 Guide link, 13A Long hole 14 Linage 15 Mount 16 Rotor 16A Engagement claw 16B Axis 17 Spring 18, 18 'Stopper 20 Locking operation link

Claims (5)

[Claims] 1. A lift prevention device for an electric grill shutter for preventing a shutter curtain having a structure in which long shutter members are connected to each other via a link in a closed state to prevent the shutter curtain from being lifted from the outside. In the closed state, one of the shutter members located in the shutter case includes a locking member which is biased to rotate to one side, and the shutter member is engaged with the locking member from above in the shutter case. When the shutter curtain is opened and closed, the engaging claw of the rotor allows the locking tool integrated with the shutter curtain to move up and down when the shutter curtain is opened and closed. Then, when the shutter curtain is pushed up from below, the engaging claw of the rotor is brought into contact with the locking tool by the tilting of the locking tool toward the rotor. A lift prevention device for an electric grill shutter, which is engaged to prevent the shutter curtain from rising. 2. A lift prevention device for an electric grill shutter for preventing a shutter curtain having a structure in which long shutter members are connected to each other via a link in a closed state to prevent the shutter curtain from being lifted from the outside. In the closed state of (1), one of the shutter members located in the shutter case includes a locking member that is pivotally biased to one side, and the shutter member located above one of the shutter members is the shutter member. The part corresponding to the upper part of the stopper is a partial member separated from the main body of the shutter member, and one of the shutter members and the partial member are connected to the side of the stopper through a locking operation link. Further, the partial member and the shutter member located above the partial member are connected via a guide link. In the shutter case, a rotor having an engagement claw that is rotationally biased to be engaged with the locking tool from above is pivotally supported. When the shutter curtain is opened and closed, the weight of the shutter curtain is increased. The guide link and the locking operation link are held in a substantially vertical state, and the locking claw that rotates while being engaged with the locking operation link is used by the engaging claw of the rotor. The guide link and the link for locking operation are held in a substantially inclined state in the direction of the engaging claw of the rotor when the shutter is pushed up from below the shutter curtain so as to face a position where the locking tool is allowed to move up and down. And at the same time, the locking member which rotates while being engaged with the locking operation link is positioned at a position where the engaging claw of the rotor is locked from above to prevent the rise of the shutter curtain. That Lifting prevention device for an electric grill shutter to symptoms. 3. The lower part of the locking member and the link for locking operation is pivotally supported by a link pin constituting a part of the shutter member, and the locking member is provided on the outer periphery of the link pin. A spring composed of a coil spring that is urged to rotate in the direction of the rotor is provided in a wound shape, and a stopper member provided on the locking tool is opposed to the rotor of a locking operation link by a resilient bias by the spring. 3. The electric grill according to claim 2, wherein the link pin is resiliently pressed against a surface opposite to the surface to be connected, and the link pin is connected to one of the notches of the shutter member so as to be continuous with the notch. 4. Shutter lift prevention device. 4. The device according to claim 2, wherein the guide link has an elongated hole for guiding the partial member up and down. 5. The shutter curtain of the electric grill shutter has a structure in which at least a part of a shutter member formed of a long body is connected to each other via a link,
The lifting prevention device for an electric grill shutter according to claim 1, 2, 3, or 4, wherein the other portion is constituted by another type of curtain such as a slat curtain.