JPH10131572A - Lifting preventive device for grill shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the elevation of a shutter curtain only when the shutter curtain is lifted under the state, in which the shutter curtain is closed, while saving power and forming simple structure. SOLUTION: The lifting preventive device for the grill shutter has a lower limit switch LS detecting the totally closed state of a shutter curtain 3, a microswitch 9 being abutted against a member to be abutted 13 and detecting total closing, a lever member 22 projected between vertical shutter members 14 at the specified place of the shutter curtain 3 and a solenoid 20 engaged with the lever member 22. The member to be abutted 13 is released from the microswitch 9 under the state, in which the lower limit switch LS detects the closing of the shutter curtain 3 and the microswitch 9 detects abutting against the shutter curtain 3, and electricity is conducted through the solenoid 20 and the lever member 22 is projected between the vertical shutter members 14 when the detection of the microswitch 9 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting prevention device for preventing a grill shutter from being lifted when it is closed.

[0002]

2. Description of the Related Art A grill shutter is formed by connecting rod-shaped shutter members such as hollow pipes to each other through links.
A shutter curtain in the form of a grill is formed, and the shutter curtain is opened and closed by raising and lowering the end of the shutter member along a pair of vertical guide rails.

[0003] When the shutter curtain is closed, locking is performed by a brake mechanism incorporated in an electric motor that opens and closes (elevates) the shutter curtain. The rotation is suppressed so that the shutter curtain does not easily rise.

However, such a grill shutter has a structure in which shutter members are connected to each other via a link plate in a state where the building opening is closed. There is a disadvantage that the link is bent by the play in the guide rail for guiding the end of the shutter member and in the shutter case connected thereto, and the shutter curtain is raised.

In the shutter case, a considerable space is provided between the take-up shaft and the upper end of the guide rail in order to secure a take-up margin of the shutter curtain. Therefore, the shutter curtain is lowered (closed state). ) Has a maximum free distance. If the shutter curtain in the closed state is strongly lifted, it may be easily lifted by 1 m or more even if the brake mechanism is operating as described above. Not only was it a cause, but there was a problem in crime prevention.

In order to prevent the shutter curtain from being lifted as described above, the grill shutter is provided with a lifting prevention device.

This lifting prevention device includes an electromagnetic solenoid that operates when the shutter curtain is fully closed.
The operation of this electromagnetic solenoid causes the lever to protrude into the movement trajectory of the shutter curtain, such as in the guide rail, and prevents the rise due to the lifting of the grill shutter by the protruding lever.

In general, such an electric shutter such as a grill shutter is provided with a lower limit switch composed of a mechanical counter on an output shaft of an electric motor for rotatingly driving a winding shaft for winding a shutter curtain. . By reading the number of rotations on the drive source side with this counter, the upper limit position and the lower limit position of the shutter curtain are detected, and the rotation of the electric motor is controlled, that is, stopped.

Accordingly, when the lower limit position of the shutter curtain is detected, that is, when the lower limit switch is operated in the fully closed state, the electric motor is stopped, and the above-mentioned electromagnetic solenoid is operated, and the lever projects to engage the shutter curtain. The lifting state is prevented in the combined state.

When the shutter curtain is opened, the lower limit switch is turned off by pressing an up button of a push button switch (hereinafter referred to as "PBS") interlocked with the lower limit switch, and the energized state of the electromagnetic solenoid is turned off. The released lever returns to its original state, and the electric motor operates to raise the shutter curtain.

[0011]

However, in the above-described conventional lifting prevention device, since the electromagnetic solenoid operates when the shutter curtain is fully closed, if the shutter curtain is closed for a long time, There has been a problem that the electromagnetic solenoid is always energized and the cost due to power consumption increases, which is uneconomical. In addition, the electromagnetic solenoid may be heated, and in the worst case, a fire may occur.

Further, when a failure such as a failure occurs in the electric motor as a drive source, the shutter curtain may be opened by rotating the shutter winding shaft by manual operation using a chain. At times, the connection between the electric motor as a drive mechanism and the winding drum is released, as in a brake release device for an electric shutter disclosed in Japanese Utility Model Application Laid-Open No. 5-96394, and PBS
Press the up button to turn off the lower limit switch and release the energized state of the electromagnetic solenoid to retract the protruding lever, that is, it is very difficult to manually open the shutter curtain. Was.

In order to solve the above-mentioned problems, the present invention prevents the shutter curtain from rising only when the shutter curtain is lifted in a state where the shutter curtain is closed. It is an object of the present invention to provide a device for preventing a grill shutter from being lifted.

[0014]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The apparatus for preventing the lifting of the grill shutter according to the present invention is the apparatus for preventing the lifting of the grill shutter 1 in which the rod-shaped shutter member 14 is prevented from rising by lifting the shutter curtain 3 having a continuous configuration via a link 17. A closing detecting means LS for detecting the shutter curtain 3 which has been fully closed by closing the shutter curtain 3, and a contact detecting means LS for contacting and detecting a part of the shutter curtain 3 when the shutter curtain 3 is fully closed. A contact detecting means 8; and a projecting means 19 projecting between the upper and lower shutter members 14 at predetermined positions of the shutter curtain 3, wherein the closing detecting means LS detects closing of the shutter curtain 3, and The contact detecting means 8 detects the contact with the shutter curtain 3 and When the shutter curtain 3 is detached from the contact detection means 8 from the state where the contact detection means 8 is released and the detection of the contact detection means 8 is released, the projecting means 19 projects between the upper and lower shutter members 14. Features.

With this configuration, when the shutter curtain 3 that has been closed is lifted by hand, the projection means 19 is operated by the closing detection means LS and the contact detection means 8 to project. , This projecting means 19
Is located between the upper and lower shutter members 14 at the predetermined position, thereby preventing the lifting.

Further, the grill shutter lifting prevention device according to the present invention lifts the grill shutter 1 in which the bar-shaped shutter member 14 is prevented from rising due to the lifting of the shutter curtain 3 which is continuous with each other via the link 17. In the prevention device, the shutter detection unit LS is turned on when the shutter curtain 3 is closed and is fully closed, and a part of the shutter curtain 3 when the shutter curtain 3 is fully closed is detected. Then, the contact detecting means 8 which is released from the energized state, and the projecting means 19 which projects between the upper and lower shutter members 14 at a predetermined position of the shutter curtain 3 when energized, comprises the closing detecting means LS Detects that the shutter curtain 3 is closed, and the contact detecting means 8 When the shutter curtain 3 separates from the contact detecting means 8 from the state where the contact with the shutter curtain 3 is detected, and the corresponding contact detecting means 8 is energized, the projecting means 19 is energized, It is characterized in that the means 19 protrudes between the upper and lower shutter members 14.

Further, in the grill shutter lifting prevention device according to the present invention, the closing detecting means LS, the contact detecting means 8 and the projecting means 19 having the above-described structure are connected in series to a power supply as an electric circuit. It may be configured to be connected.

With such a configuration, in this grill shutter lifting prevention device, the closing detecting means LS detects the closing of the shutter curtain 3 and becomes energized, and the contact detecting means 8 sets the shutter curtain 3 Only when the shutter curtain 3 is detached from the contact detection means 8 from the non-energized state after detecting the contact with The projecting means 19 is energized and projects.

[0019]

FIG. 1 is a front view of a grill shutter provided with a grill shutter lifting prevention device according to the present invention. FIG. 2 is a schematic side sectional view of the grill shutter.
3 and 4 are perspective views showing an embodiment of a grill shutter lifting prevention device according to the present invention.

The grill shutter lifting prevention device according to the present invention is provided in the shutter case 2 of the grill shutter 1 in this embodiment.

As shown in FIG. 1, the grill shutter 1 is disposed at an opening of a building such as a house or a store. It is provided on the upper edge of the building opening.

As shown in FIG. 2, a shutter curtain 3 is provided between a pair of guide rails 4 erected on both left and right edges of a building opening connected to a lower edge of the shutter case 2.
There is provided a slit-shaped opening 5 through which a hole enters and exits, and a pair of lintels 6 a and 6 b are provided in the opening 5 along the longitudinal direction of the opening 5.

And one of these lintels 6
As shown in FIG. 2, a curved door stop 7 is provided at the upper part of a to guide the shutter curtain 3 in and out (up and down).

A lifting prevention device according to the present invention is provided above the other lintel 6b so as to face the door stop 7.

This device for preventing the lifting of the grill shutter is generally constituted by a contact detecting means 8, a lower limit switch LS as a closing detecting means, and a projecting portion 19 as a projecting means.

In the present embodiment, the contact detecting means 8 comprises a microswitch 9 and a member 13 to be contacted.

As shown in FIG. 3, the microswitch 9 is disposed on a substantially horizontal substrate 10 provided above the other lintel 6b.

The microswitch 9 has an operator 12 which moves forward and backward in the horizontal direction with respect to the microswitch main body 11, and as shown in FIG. The shutter curtain 3 faces the moving trajectory A.

In the microswitch 9, the tip 12a of the actuator 12 comes into contact with a contact member 13 described later.

The tip 12a of the actuator 12 is
It is formed in a substantially hemispherical shape.

In the present embodiment, the microswitch 9 is turned on (energized state) when the operator 12 is protruded from the main body 11, and is turned off (non-energized state) when the operator 12 is pushed and retracted. It is set to be.

Next, as shown in FIG. 4, the abutted member 13 is provided between a pair of shutter members 14 which are vertically arranged.

The contact member 13 is composed of a plate 15 and a spring member 16. The plate 15 is bridged between the pair of shutter members 14 as shown in FIG.
Further, both ends thereof are attached so as to be wound around the shutter member 14, respectively. The above plate 1
The shutter member 14 wound around 5 is provided with a regulating member that regulates the plate 15 from sliding left and right with respect to the shutter member 14 (not shown).

The plate 15 has both ends rotatable with respect to the shutter member 14, and has the same configuration as the link 17 connecting the shutter members 14.

The spring member 16 is provided on one plate surface of the plate 15.

The spring member 16 has a substantially rectangular plate shape, and is formed by bending both ends thereof into a letter shape. The tip 16a, which is one end of each of the bent ends, is the plate 1
The base end 16b, which is the upper end of the plate 5 and is the other end, is fixed to the lower part of the plate 15 of the plate 15. The flat intermediate portion 16c of the spring member 16 projects away from the surface of the plate 15, is parallel to the plate 15,
The tip 16a of the spring member 16 is also slightly separated from the surface of the plate 15.

Then, as shown in FIG. 4, the spring member 16 is
The flat middle portion 16c of the spring member 16 interferes with the protruding actuator 12 of the microswitch 9 so that the shutter curtain 3 is fully closed. Then, the contacted member 13 faces the microswitch 9, and the spring member 16 contacts the actuator 12 as shown in FIGS. 6 and 7. At this time, the spring member 16 retreats the actuator 12 without the spring member 16 being deformed by the elastic force.

Next, although not shown, the lower limit switch is, for example, a mechanical counter which is connected to an output shaft of an electric motor for rotatingly driving a winding shaft for winding the shutter curtain 3 and performs a counting operation, and a counter for the counter. And a switch for outputting a signal when the count value of the counter value matches a preset value. That is, when the lower limit position of the shutter curtain 3 is detected by reading the rotation speed of the counter on the drive source side, the shutter curtain 3 is turned ON (energized state).

Next, as shown in FIG.
It is provided on a substrate 10 adjacent to the microswitch 9. The protruding portion 19 includes an electromagnetic solenoid 20 and a lever member 22.

The electromagnetic solenoid 20 is provided with a movable shaft 21 on a horizontal center axis of the main body, which moves in a horizontal direction along the center axis. The distal end 21a of the movable shaft 21 is directed to the moving trajectory A of the shutter curtain 3, similarly to the actuator 12 of the micro switch 9.

The movable shaft 2 of this electromagnetic solenoid 20
1 is retracted into the main body when energized, and protrudes by an urging member (not shown) disposed inside when de-energized.

As shown in FIG. 3, the lever member 22 is provided so as to be able to swing through a support shaft 24 provided between a pair of brackets 23 erected on the substrate 10. ing.

The lever member 22 is composed of a base 25 and a distal end 26 via a shaft 18 so that it can be bent halfway.
Of the movable shaft 21 via a shaft 18. The tip 26a of the tip 26 is formed in a wedge shape.

The base portion 25 and the distal end portion 26 are kept straight by a restricting portion 25b formed on the base portion 25, and the distal end portion 26 is
5 is rotatable. The shaft 18 connecting the base 25 and the tip 26 is provided with a torsion coil spring or the like so that the tip 26 with respect to the base 25 is always kept straight.

A hole 25c formed in the base 25 through which the support shaft 24 penetrates is formed as a slit-like long hole, and the support shaft 24 slides in the long hole 25c.
The lever member 22 can slide and swing by being guided by the support shaft 24.

Then, when the electromagnetic solenoid 20 is energized, the movable shaft 21 is moved by the attraction force to the electromagnetic solenoid 20.
When the lever member 22 is retracted inward, the lever member 22 swings around the support shaft 24 via the elongated hole 25c, and swings.
2 is in a substantially horizontal state and protrudes into the movement trajectory A of the shutter curtain 3.

When the energized state of the electromagnetic solenoid 20 is released, the movable shaft 21 which has been retracted into the electromagnetic solenoid 20 is protruded by the aforementioned urging member, and
Is guided around the support shaft 24 through the elongated hole 25c, swings, retreats from the movement trajectory A of the shutter curtain 3, and returns to the original state.

Next, the operation of the apparatus having the above configuration will be described with reference to side views shown in FIGS. 5 to 8 and schematic circuit diagrams corresponding thereto. This circuit, like the schematic circuit diagram shown in the figure,
A micro switch 9, a lower limit switch LS and an electromagnetic solenoid 20 are connected in series, and both ends thereof are
For example, it is connected to a DC power supply.

First, in a state where the shutter curtain 3 is housed in the shutter case 2 and a state where the shutter curtain 3 is moving down and up along the guide rail 4, as shown in FIG. Since the distal end portion 12a of the actuator 12 does not contact the spring member 16, the microswitch 9 does not detect it, and as shown in FIG.
The micro switch 9 is in an ON state. However, since the shutter curtain 3 is not in the fully closed state, the lower limit switch LS is in the OFF state. Therefore, the electromagnetic solenoid 20 is not energized, and FIG.
As shown in (c), the lever member 22 does not project.

Next, when the shutter curtain 3 is further lowered and immediately before closing, as shown in FIG.
The second tip 12 a contacts the spring member 16. As a result, the actuator 12 retreats, and the micro switch 9 detects it, and as shown in FIG. 6A, the micro switch 9 is in the OFF state. Since the shutter curtain 3 is not in the fully closed state as shown in FIG. 6C, the lower limit switch LS is in the OFF state because the shutter operation is the same as during the above-described descending operation. Therefore, the electromagnetic solenoid 20 is not energized, and the lever member 22 does not project as shown in FIG.

When the shutter curtain 3 is lowered and closed, that is, when the shutter curtain 3 is fully closed, as shown in FIG. 7A, the lower limit switch LS detects it and the lower limit switch LS is in the ON state. become. However, as shown in FIG. 7B, the tip 12a of the actuator 12
Since the actuator 12 is in contact with the spring member 16, the actuator 12 is retracted and is detected by the microswitch 9, and as shown in FIG. 7A, the microswitch 9 remains OFF. Therefore, as shown in FIG.
Does not protrude.

Now, when the shutter curtain 3 is fully closed and the shutter curtain 3 is lifted by hand, as shown in FIG. 8B, the contact member 13 is provided. The shutter member 14 is moved up with respect to the microswitch 9, and the tip 12 a of the actuator 12 is separated from the spring member 16. Then, the actuator 12 protrudes from the microswitch main body 11 and the detection of the microswitch 9 is released, that is, the microswitch 9 is moved to the state shown in FIG.
As shown in FIG. At this time, the lower limit switch LS keeps detecting the fully closed state of the shutter curtain 3 and the lower limit switch LS
Is in the ON state, the electromagnetic solenoid is energized, and as shown in FIG. 8C, the lever member 22 protrudes and moves on the movement trajectory A of the shutter curtain 3, ie,
It protrudes between the shutter members 14. Then, the lifted shutter curtain 3 is prevented from rising, that is, lifting is prevented.

When the lever member 22 projects,
When the lever member 22 hits the shutter member 14,
When the shutter curtain 3 is further raised from this state, the shutter member 14 separates from the lever member 22 and the distal end portion 26 moves to the base portion 25. , And protrudes between the shutter members 14 to prevent lifting.

When the shutter curtain 3 is lowered again from the state of being lifted by the hand, the spring material 1
6 comes into contact with the tip 12a of the actuator 12 (see FIG. 7B). As a result, the actuator 12 retreats and is detected again by the micro switch 9, and the micro switch 9
As shown in FIG.
Is released, and the lever member 22 protruding on the movement path A retreats as shown in FIG. 7C and returns to the original state.

As described above, in the above-described embodiment, only one of the micro switch 9 and the lower limit switch LS is turned on (FIG. 5A, FIG. 7).
(See FIG. 8A), the lever member 22 does not protrude, and the electromagnetic solenoid 20 is energized only when the micro switch 9 and the lower limit switch 18 are both turned ON (see FIG. 8A). 22 protrudes. This makes it possible to prevent the shutter curtain 3 from being lifted.

In the fully closed state of the shutter curtain 3 (see FIG. 7), since the micro switch 3 is in the OFF state, the electromagnetic solenoid 20 is not energized, and the shutter curtain 3 is closed for a long time. Even though it is economical, there is no cost due to power consumption. For this reason, a fire does not occur due to heating of the electromagnetic solenoid 20 due to prolonged energization.

In the above-described embodiment, the case where the microswitch 9 is provided on the other lintel 6b has been described. However, the present invention is not limited to this position. For example, the microswitch 9 is provided in the guide rail 4. May be. In this case, the contacted member 13 is provided on the link 17 so as to face the guide rail 4. When the shutter curtain 3 is fully closed as in the above-described embodiment, the abutted member 13 faces the microswitch 9.

In the above-described embodiment, the protrusion 1
Although the case where 9 is provided on the other lintel 6b has been described, the present invention is not limited to this position. For example, it may be provided in the guide rail 4 and a plurality of the protrusions 19 are provided. It may be configured. In addition, it may be provided not only on one guide rail 4 but also on each guide rail 4 on both sides. Also in this case, the same operation and effect as those described above can be obtained.

Further, as described above, when the position of the projecting portion 19 is arranged in the guide rail 4, by providing it below the guide rail 4, the shutter curtain 3 can be moved from the lintel 6 to the end of the shutter curtain 3. Lifting of the shutter curtain 3 due to refraction of the link 17 between the lower ends can be prevented, and the rising length can be shortened, which is effective in crime prevention.

The member to be abutted may not be constituted by the plate 15 and the spring member 16, and may be, for example, the shutter member 14 itself or the link 17.

[0061]

As described above, in the apparatus for preventing the lifting of the grill shutter according to the present invention, the protruding means operates and protrudes by the contact detecting means and the closing detecting means only when the shutter curtain in the closed state is raised. It is possible to prevent the grill shutter from rising due to lifting.

Further, when the shutter curtain is closed, the contact detecting means detects the contact with the shutter curtain, and is not energized. Therefore, even if the shutter curtain is closed for a long time, the cost due to power consumption is reduced. It is economical and has the effect of being economical. Further, since the projecting means is not energized, a fire does not occur due to heating of the projecting means by energizing for a long time.

[Brief description of the drawings]

FIG. 1 is a front view of a grill shutter provided with a grill shutter lifting prevention device according to the present invention;

FIG. 2 is a schematic side sectional view of the grill shutter.

FIG. 3 is a perspective view showing an embodiment of a grill shutter lifting prevention device according to the present invention;

FIG. 4 is a perspective view of the same.

5A is a circuit diagram showing the operation of the lifting prevention device, FIG. 5B is a side view, and FIG.

6A is a circuit diagram showing the operation of the lifting prevention device, FIG. 6B is a side view thereof, and FIG.

7A is a circuit diagram showing the operation of the lifting prevention device, FIG. 7B is a side view, and FIG.

8A is a circuit diagram showing the operation of the lifting prevention device, FIG. 8B is a side view, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Grill shutter 3 ... Shutter curtain 8 ... Contact detection means 14 ... Shutter member 17 ... Link LS ... Closure detection means (lower limit switch) 19 ... Projection means (projection part)

Claims (3)

[Claims] 1. A lift prevention device for a grill shutter, wherein a bar-shaped shutter member is connected to each other via a link to prevent the shutter curtain from rising by lifting, wherein the shutter curtain is closed to a fully closed state. Closing detection means for detecting the shutter curtain that has become contacted; contact detection means for contacting and detecting a part of the shutter curtain when the shutter curtain is fully closed; and upper and lower shutters at predetermined positions of the shutter curtain. And a projecting means projecting between the members, wherein the closing detection means detects the closing of the shutter curtain, and the contact detecting means detects the contact with the shutter curtain. The shutter curtain is detached from the contact detection means, and Of when the detection is released, the lifting prevention device of the grille shutter, characterized in that said projecting means projects between the upper and lower shutter members. 2. A lift prevention device for a grill shutter, wherein a bar-shaped shutter member is connected to each other via a link to prevent the shutter curtain from rising by lifting, wherein the shutter curtain is closed to a fully closed state. And a contact detection unit that is in contact with a part of the shutter curtain when the shutter curtain is fully closed, and when the contact is detected, the contact detection unit is released. Projecting means projecting between the upper and lower shutter members at a predetermined position of the shutter curtain, wherein the closing detecting means detects the closing of the shutter curtain, and the contact detecting means contacts the shutter curtain. From the state where contact is detected, the shutter curtain is moved from the contact detection unit. Emerged, the abutment detection means is energized, the power is supplied to the projecting means, the lifting prevention device of the grille shutter projecting means and wherein the projecting between the upper and lower shutter members. 3. A grill shutter according to claim 2, wherein said closing detecting means, said contact detecting means, and said projecting means are connected in series as an electric circuit to a power supply. Anti-lift device.