JPH0512474Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a locking device for shutters placed at so-called openings such as entrances and exits of buildings and windows. Regarding shutter locking devices.

Here, the grill shutter (also called pipe shutter) is vertically (direction of shutter movement)
This is a shutter consisting of a plurality of pipe members arranged horizontally across the area and a link member that connects the pipe members in a flexible manner, and the present invention is applicable to all shutters having the same structure. be.

[Conventional technology]

In general, lightweight shutters such as grille shutters are braked by a braking mechanism built into the electric opening/closing machine when closed, but the shutter curtain is rolled up from the position where it has come off the guide rail. In the section up to the drum, the longer the section, the more likely it is to sag against the upward lifting force, and this tendency is exacerbated, especially in grill shutters, where the structure makes it easy to grasp and pull up the pipe. However, there is no fundamental solution to this problem.

For this reason, Publication No. 59-32697, Publication No. 59-32697,
As seen in Japanese Patent No. 32698, it has been proposed that a locking device is provided in the lintel of the grille shutter, which engages with the shutter curtain using a solenoid.

However, in these conventional technologies, the operation of the opening/closing machine using a push-button switch and the locking device are electrically linked, which requires electrical circuit wiring work, making the mechanism complex and weakening the structure. , resulting in a high failure rate. Additionally, it has the disadvantage of malfunctioning in the event of a power outage.

[Problem to be solved by the invention] In view of the above-mentioned circumstances, the invention does not rely on electric circuits,
The object (technical problem) is to provide a locking device that has a simple structure and is particularly suitable for application to grill shutters.

[Means to solve the problem]

In order to achieve the above object, the grill shutter locking device of the present invention adopts the following configuration (technical means).

That is, when the shutter is in the closed position,
A predetermined interval is maintained between the vertically adjacent pipes of the grille shutter curtain at a position near the upper end of the guide rail that guides the fitting of both ends of the grille shutter curtain, and away from the surface of the shutter curtain. A locking lever rotating shaft that is interlocked with the rotation of the electric opening/closing machine is disposed parallel to the locking lever rotating shaft, and the locking lever is attached to the locking lever rotating shaft so as to protrude from the rotating shaft and is swingable around the rotating shaft when the locking lever is in the closed position. characterized in that it lies between the pipes in a substantially horizontal state and engages with the pipes within the swinging region.

In the above configuration, the specific structure of the locking lever that can swing around the rotation axis is not limited to that illustrated in the embodiment, and other structures that perform the same function are not excluded. In addition, the locking lever rotating shaft can be either directly linked to the electric opening/closing machine, or indirectly linked via a winding drum. It is sufficient if it is linked to. In addition, the expression that the locking lever is in a "substantially horizontal state" means that the locking lever is allowed to be tilted slightly within the range in which it performs a predetermined function.

[Effect]

When the shutter curtain is in the closed state, the electric opening/closing machine and the winding drum are in a braked state, and therefore the locking lever rotating shaft and the locking lever that are linked to this are in an immovable state.
The locking lever is inserted with a play gap between the pipes,
The shutter curtain becomes locked by the engagement between the locking lever and the pipe. Since the shutter curtain is locked at a position near the upper end of the guide rail where it is restrained by the guide rail, the curtain does not sag against the force that tries to pull it up.

Next, when opening (or pulling up) the shutter curtain, the opening/closing machine and the winding drum rotate, and the locking lever rotation shaft and the locking lever are rotated in conjunction with this, and the engagement between the locking lever and the pipe is released.

Even if the locking lever and the pipe of the shutter curtain come into contact while the shutter curtain is moving, the locking lever is designed to be able to swing, preventing excessive force (i.e. braking force) from being applied to the pipe and eventually the shutter curtain. The shutter curtain can be raised smoothly without adding any additional pressure.

[Embodiment]

The locking device of the present invention adopts the following embodiments.

The locking lever must be able to swing around the rotation axis and move forward and backward in the radial direction passing through the center of the rotation axis. According to this aspect, even if the tip end surface of the locking lever comes into contact with the pipe of the shutter curtain, the shutter is allowed to move without falling into a so-called dead center state.

〔effect〕

The grill shutter locking device of the present invention has the above-mentioned configuration and functions, and therefore has the following unique effects.

According to the device of the present invention, only a small number of members such as the locking lever and the rotating shaft of the lever are required, and the mechanism is simple and sturdy, so that the failure rate is significantly reduced.

According to this device, since the braking force of the electric switch is mechanically linked, the door can be locked without being affected by energization.

According to the present device, a normal shutter curtain can be used as it is without attaching any special member to the shutter curtain, and therefore the shutter curtain can be wound up normally.

〔Example〕

An embodiment of a locking device for a grill shutter according to the present invention will be described based on the drawings.

1 to 4 show the structure of a locking device applied to a grill shutter as an embodiment thereof.

Figure 4 shows the overall structure of a shutter equipped with this locking device.

In FIG. 4, 1 is an opening, 2 is a floor surface of the opening 1, and 3 is a lintel provided on the ceiling surface of the opening 1.

Guide rails 4 are provided on both sides of the opening 1 to face each other, and extend above the floor 2 of the opening 1 and above the lintel 3 of the ceiling. The guide rails 4 fit into both ends of a shutter curtain, which will be described later, to restrain the deflection of the shutter curtain and guide its vertical movement.

6 is a mounting bracket (also referred to as a bearing portion) for the drive device 20, and 8 is a winding drum for the shutter curtain. The winding drum 8 is rotatably supported between mounting brackets 6 arranged opposite to each other.

The grill shutter curtain 10 is composed of pipes 11 arranged in parallel and a link member 12 that connects the pipes 11 in a flexible manner, and a seat plate 13 is attached to the lower end of the shutter curtain 10. The seat plate 13 fits into the lintel 3 in the open state of the shutter.

The drive device 20 is mainly composed of a shutter opening/closing machine 21, and includes an opening/closing machine sprocket 22, a winding drum sprocket 23, a locking lever rotating shaft sprocket 24, which are interlocked with the drive shaft of the shutter opening/closing machine 21.
and a roller chain 25 that is stretched around each of these sprockets 22, 23, and 24.

The shutter opening/closing machine 21 is electric, and
Due to the nature of the shutter opening/closing device 21, that is, it is necessary to maintain the shutter curtain in an open state, a braking mechanism is built-in.

In the drive device 20, each sprocket 22,
By changing the gear ratio of 23 and 24 appropriately,
Of course, the rotational speeds of the winding drum 8 and the lever rotating shaft 36 can be determined as appropriate.

This embodiment is characterized in that, in the above-described shutter structure, a locking device 30 is disposed above the lintel 3 and near the upper end of the guide rail 4.

1 to 3 show details of this locking device 30, and the locking device 30 has a lever rotating shaft 3.
1. Fixed cylinder 31, movable cylinder 34 and locking lever 37
Consists of the main parts. The fixed cylinder 32 and the movable cylinder 34 constitute a swing mechanism.

Hereinafter, the case members of the locking device 30 will be explained in detail.

The lever rotation shaft 31 has one end supported by a bracket 6 and the other end supported by another bracket 6, and is rotated by the switch 21 via a sprocket 24 fixed to the end.

The center axis of the lever rotation shaft 31 corresponds to an intermediate position between the vertically adjacent pipes 11 at a position where the shutter curtain 10 is subjected to the restraining action of the guide rail 4 and does not sag when the shutter is in the closed position. Further, it is arranged horizontally at a position set back from the printing surface of the shutter curtain 10 by keeping a predetermined distance therebetween.

It goes without saying that the shutter curtain 10 does not sag when it is inside the guide rail 4, but even when it is separated from the guide rail 4 as shown in the figure, the slats formed by the adjacent pipes 11 will not sag. Maintain a flat surface for at least 3 to 5 rows,
It does not cause sagging. Of course, this does not exclude that it is within the vertical projection plane of the guide rail 4.

The fixed cylinder 32 is fitted onto the lever rotation shaft 31 and fixed to the lever rotation shaft 31 with a fixing bolt 33. 32a is a slide groove.

The movable cylinder 34 is fitted onto the lever rotating shaft 31 in line with the fixed cylinder 31, and its end is fitted into the recess of the fixed cylinder 32 so as to be rotatable in the circumferential direction.

A locking lever 37 is arranged to protrude from the other end of the movable cylinder 34 . In this embodiment, the locking lever 37 is integrally fixed to the movable cylinder 34, but the base of the locking lever 37 is inserted into a recess (not shown) bored in the radial direction of the movable cylinder 34. A movable mode may be adopted in which a resilient member (for example, a coil spring, a rubber spring, etc.) is interposed between the two, and the locking lever 37 is retractable when subjected to a force in its longitudinal direction.

At the fitting part of the movable cylinder 34 to the fixed cylinder 32,
A pin 35 fixed to the movable cylinder 34 is fitted into the slide groove 32a of the fixed cylinder 32, and its tip protrudes from the surface of the fixed cylinder 32.

A spring member 36 is installed between the opposing pins 35, both ends of the spring member 36 are brought into contact with the pins 35, and the middle portion is fixed to the fixed cylinder 32. In this embodiment, a single spring member 36 is arranged, but one spring member is arranged for each pin 35,
Its one end is in contact with the pin 35, and the other end is in contact with the fixed cylinder 3.
It is also possible to adopt an aspect in which the number is fixed at 2.

The locking lever 37 is always held at the center position by the action of the spring member 36, and when a rotational force is applied to the locking lever 37, the pin 35 and the movable cylinder 34
moves against the elastic force of the spring member 36, allowing the locking lever 37 to swing within a certain range l.

Thus, when the shutter is in the closed position, the locking lever 37 enters between the pipes 11 of the shutter curtain 10 in a horizontal state. Even if only the shutter curtain 10 moves in this state, the pipe 11 will collide with the locking lever 37, and the locking lever 37 will be moved a little (within the range l), but it will not come off between the pipes 11 and the opening/closing Further movement is prevented by a locking lever 37 which is braked by 21.

The locking device of this embodiment operates as follows.

(1) When the shutter is in the closed state, the opening/closing machine 2
1 is turned off, and the switch 21 is braked. Therefore, the winding drum 8 and the lever rotating shaft 31, which are interlocked with the opening/closing machine 21 via the sprockets 23, 24 and the roller chain 25, are also braked.

In this state, the locking lever 37 is engaged between the pipes 11 of the shutter curtain 10, and the locking device 30 is placed at a position where the shutter curtain 10 does not slacken. Therefore, even if a lifting force is applied to the shutter curtain 10, the locking lever 37 prevents the lifting force from acting on the shutter curtain 10.
becomes something that cannot be lifted up.

(2) When the shutter is opened by the opening/closing machine 21, the rotation of the opening/closing machine sprocket 22 rotates the winding drum sprocket 23 and the lever rotation shaft sprocket 24 via the roller chain 25, and the winding drum 8 and the lever rotation shaft rotate. Rotate 31.

The shutter curtain 10 is wound up by the rotation of the winding drum 8, and the shutter curtain 1 is
Gradually increase 0. By rotating the lever rotation shaft 31 and raising the shutter curtain 10,
The locking device 30 is immediately disengaged.

(3) The rotational angular velocity of the take-up drum 8 and the rotation angular velocity of the lever rotation shaft 31 (and thus the locking lever 37) due to the drive of the opening/closing device 21 are constant, but the shutter curtain 10 is rotated at a constant speed. As the film is wound up, its rising speed gradually changes.

Therefore, while the shutter curtain 10 is rising, the locking lever 37 and the shutter curtain 10
However, since the locking lever 37 is swingable, the shutter curtain 10 can be smoothly closed without applying excessive force (i.e., braking force) to the pipe and, by extension, the shutter curtain 10. will be lifted up.

The present invention is not limited to the above-mentioned embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are examples included within the technical scope of the present invention.

In this embodiment, the opening/closing machine sprocket 22 and the lever rotation shaft sprocket 2 of the drive device 20 are
4 is interlocked with the roller chain 25 via the winding drum sprocket 23, but it goes without saying that both sprockets 22 and 24 may be directly interlocked.

Furthermore, the same effect can be obtained even if the winding drum sprocket 23 and the lever rotating shaft sprocket 24 are interlocked.

[Brief explanation of the drawing]

The drawings show an embodiment of the locking device for a grill shutter according to the present invention, and FIG. 1 is a side view showing the main parts of one embodiment, FIG. 2 is a view taken in the X direction of FIG. 1, and FIG.
The figure is a sectional view taken along the line A-O-B in Fig. 1, and Fig. 4 is an overall structural view of the shutter in a closed state, to which the present locking device is applied. 4...Guide rail, 10...Shutter curtain, 11...Pipe, 12...Link member, 2
1... Opening/closing machine, 30... Locking device, 31... Lever rotating shaft, 37... Locking lever.

Claims (1)

[Scope of Claim for Utility Model Registration] When the shutter is in the closed position, between the vertically adjacent pipes of the grille shutter curtain at a position near the upper end of the guide rail that guides the both ends of the grille shutter curtain, Further, a locking lever rotating shaft that is connected to the rotation of the electric opening/closing machine is disposed parallel to the shutter curtain at a predetermined interval apart from the printing surface of the shutter curtain, and is protrudingly attached to the locking lever rotating shaft and is attached to the locking lever rotating shaft and is connected to the rotating shaft. A grill shutter characterized in that a locking lever that is swingable about an axis exists between the pipes in a substantially horizontal state in the closed position, and engages with the pipe within the swinging region. locking device.