JP3267112B2 - Shutter safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a shutter which is attached to an electrically operated slat type or grill type shutter device and serves as a safety mechanism when a shutter curtain is lowered and closed. .

[0002]

2. Description of the Related Art In an electric shutter provided at an opening of a building, a shutter curtain constituting a shutter descends from above to close the opening.
When there is an article or a person directly under the shutter curtain, the article or the person becomes an obstacle, and the obstacle is sandwiched between the shutter curtain and the floor surface, which may cause a damage accident.

In order to prevent such accidents beforehand, various types of obstacle detecting means have been devised in the shutter device for detecting the presence of an obstacle during a descent operation. The descent of the shutter curtain was stopped to prevent an accident.

Generally, in a shutter constructed in consideration of this kind of safety purpose, as shown in FIG. 10 or FIG. 11, a contact type electric contact is provided on the lowermost edge portion of the shutter curtain 101 as an obstacle detecting means. A frame 104 equipped with a microswitch 103 as a dynamic switch means is provided, and a box-shaped seat plate 102 as shown in FIG. 10 or a dish-shaped seat plate 102 as shown in FIG. When the shutter plate 101 is descending and the seat plate 102 comes into contact with the obstacle X, the seat plate 102 rises with respect to the frame 104, and the switch 103 detects this rise. Then, a drive motor (not shown) for raising and lowering the shutter curtain 101 is stopped by this operation signal, or raised after the stop.

[0005]

The conventional obstacle detecting means configured as described above detects an obstacle X by the vertical movement of the seat plate 102 relative to the lowermost edge of the shutter curtain 101. , Which stops the shutter drive motor.However, even if the drive motor that is rotating is braked and stopped, due to mechanical structural reasons such as errors between components and clearances, inertia, etc. A time lag occurs until the descent of the curtain 101 is completely stopped.

In other words, even after the seat plate 102 rides on the obstacle X, a problem occurs that the load of the shutter curtain itself accompanying the descent of the shutter curtain 101 is applied to the obstacle X for a short period of time. I do. And if the obstacle is a human body, it will have serious consequences.

In order to solve the above-mentioned problems, the present invention is designed to solve the problem of a time lag between detection of an obstacle and stopping of the shutter curtain when an obstacle is present when the shutter curtain descends. An object of the present invention is to provide a shutter safety device that prevents a load of a shutter curtain from being applied to an obstacle.

[0008]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The safety device 6 for a shutter according to the present invention includes a cushioning portion 7 and a seat plate 5 connected to the lowermost edge of the shutter curtain 2, and the buffering portion 7 is arranged with respect to the lowermost edge 2 a of the shutter curtain 2. Has a predetermined rising distance L,
In the safety device for an electric shutter in which the seat plate 5 can be raised with respect to the shutter curtain 2 by the buffer portion 7, the predetermined rising distance L of the buffer portion 7 is such that the shutter curtain 2 is lowered. In this case, at least the descent distance of the shutter curtain 2 corresponding to the time from when the seat plate 5 contacts the obstacle X to when the shutter curtain 2 stops is set.

Further, the safety device for a shutter according to the present invention comprises a buffer portion 7 and a seat plate 5 connected to the lowermost edge 2a of the shutter curtain 2, and the buffer portion 7 is provided at the lowermost portion of the shutter curtain 2. The seat plate 5 has a predetermined rising distance L with respect to the edge 2a, and the cushioning portion 7 allows the seat plate 5 to rise with respect to the shutter curtain 2. In the safety device for an electric shutter provided with a detection unit 11 for detecting the elevation of the seat plate 5 with respect to the lowermost edge 2a of the shutter curtain 2 in the buffer unit 7 when the plate 5 comes into contact with the obstacle X, The predetermined rising distance L of 7 is
At least, the descending distance of the shutter curtain 2 corresponds to the time from when the detecting means 11 detects the rise of the seat plate 5 to when the shutter curtain 2 stops.

It is preferable that the detecting means 11 performs a detecting operation at an early stage of a relative operation of the shutter curtain 2 with respect to the seat plate 5.

Further, the above-mentioned buffering section 7 is composed of a plurality of nested hanging frames 8a, 8b, 8c.
The structure in which the seat plate 5 is mounted on the lowermost frame 8a, or the slat-like members 12, 1 which are overlapped in the front-back direction and are connected to each other so as to be slidable in the vertical direction relative to each other.
3 and the lowermost edge 2a of the shutter curtain 2.
And a structure constituted by a hollow box-shaped member 18 suspended by the lowermost edge 2a.

Thus, the time from when the seat plate 5 located at the lowermost edge 2a of the shutter curtain 2 comes into contact with the obstacle X to when the detecting means 11 is activated and the shutter curtain 2 is completely stopped, the time required for the obstacle to stop. The shutter curtain 2 has a margin to descend with respect to the seat plate 5 so that the shutter load is not applied to X. For this reason, even if the shutter curtain 2 continues to descend from the time when it is detected that the seat plate 5 has climbed on the obstacle X to the time when the descent of the shutter curtain 2 is completely stopped, the shutter curtain is not moved to the obstacle X. Since the load of No. 2 is not applied, the safety of the shutter is ensured.

Since only the load of the seat plate 5 is applied to the obstacle X, no injury is caused to the human body.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A shutter safety device according to the present invention is provided on an electric shutter 1 disposed at an opening of a building. As shown in FIG. 1, the electric shutter 1 has a slat type shutter curtain 2 housed in a shutter case 3 provided on the upper edge of a building opening, and guide rails provided on both left and right sides of the opening. It moves up and down along 4 and 4, and the opening and closing of the opening is performed. And
Shutter curtain 2 constituting this electric shutter 1
Is connected to the lowermost edge 2a.

Hereinafter, a safety device for a shutter according to the present invention will be described.
Each embodiment will be specifically described with reference to the drawings.

Embodiment I As shown in FIG. 2, a shutter safety device 6 according to Embodiment I comprises a buffer portion 7 connected to the lowermost edge 2a of the shutter curtain 2, and a seat plate 5. Is done.

The buffer section 7 is of a nested type and is composed of a plurality of, for example, three stages of upper, middle and lower suspended frames 8a, 8b and 8c. Lower and middle frames 8a, 8b
Is suspended from the upper frame members 8b and 8c,
A hook-shaped suspended portion 9 protruding outward is provided at each of the upper end edges located in front and rear, and each of the upper frames 8b and 8c is engaged with the suspended portion 9 to be suspended. Is provided at each lower end edge located in front and rear.

The uppermost frame 4c of the buffer 7
Is connected to the lowermost edge 2a of the shutter curtain 2,
The seat plate 5 is mounted on the lowermost frame 4a.

According to this configuration, each of the frames 8a and 8b is
Since it is possible to retreat into the upper frame members 8b and 8c, as shown in FIG. 3, the cushion plate 7 allows the seat plate 5 to be raised with respect to the shutter curtain 2.

In the first embodiment, the switch lever 11a is used as a detecting means for detecting the obstacle X.
As shown in FIG. 2, the microswitch 11 having
It is attached to the indoor horizontal portion 5a of the seat plate 5. The micro switch 11 is provided with a switch lever 11
a is opposed to the side surface of the frame of the buffer portion 7, and the switch lever 11a is mounted such that the tip of the switch lever 11a is close to the outer lower edge of the middle frame 8b.

That is, when there is an obstacle X when the shutter curtain 2 descends, the cushion plate 7 raises the seat plate 5 with respect to the shutter curtain 2 as shown in FIG. Middle frame 8b
An obstacle X is detected by abutting on the outer lower edge of the object and detecting its rise.

Here, the shutter load is applied to the obstacle X during the time from when the seat plate 5 located at the lower edge of the shutter curtain 2 contacts the obstacle X to when the switch 11 is operated and the shutter curtain 2 stops. In order to prevent the shutter curtain 2 from being added, the shutter curtain 2 has a margin to descend with respect to the seat plate 5, and has a length L in FIG.

In the first embodiment, the margin for the shutter curtain 2 to descend with respect to the seat plate 2, that is, the rising distance of the buffer portion 7 is determined by the lowermost edge 2a of the shutter curtain 2.
Is the relative rising distance of the seat plate 5, and the distance (stroke) L is at least the switch 11 is operated after the seat plate 5 contacts the obstacle X, and the shutter curtain 2 is completely stopped. The time until the shutter can be lowered.

The switch 11 is configured to perform a detection operation at an early stage of the relative operation of the shutter curtain 2 with respect to the seat plate 5, which is effective in minimizing the stroke L described above. In the embodiment, the tip of the switch lever 11a is arranged close to the outer lower edge of the middle frame 8b.

In this embodiment, the switch 11
Is connected to a shutter curtain 2
At the time of descent, an obstacle X is detected, and when the switch is turned on, an obstacle detection signal is transmitted to a receiver connected to a control system of an electric motor (not shown) for elevating and lowering a shutter curtain. The stop control of the motor is performed, and the descent of the shutter curtain 2 stops.

Therefore, according to the shutter safety device of this embodiment, the mechanical loss time from when the switch 11 detects the obstacle X to when the shutter curtain 2 stops descending, and the shutter curtain 2 Even if the descent is continued, as shown in FIG. 3, the frames 8a and 8b are nested into the frames 8b and 8c within the range of the stroke L and retreated, so that the frames 8a and 8b are retracted. Although the load of the seat plate 5 may be applied to the obstacle X, the load of the shutter curtain 2 is not applied to the obstacle X. Accordingly, the safety of the shutter can be ensured within a range that does not cause damage to the obstacle X or injury to the human body.

In the above-described embodiment I, the switch 11 as the means for detecting the obstacle X only needs to be provided on either the lowermost edge portion 2a of the shutter curtain 2 or the seat plate 5. Also, a contact-type electrical switch mechanism such as a microswitch as described above,
A configuration such as a non-contact electrical switch mechanism such as a reed switch using magnetism, a light detection mechanism using light such as infrared rays, and an image sensor such as a CCD may be adopted.

Embodiment II Next, Embodiment II of the shutter safety device of the present invention will be described. In Embodiment II, the same or equivalent parts as those in Embodiment I described above are denoted by the same reference numerals, and description thereof will be omitted.

The buffer portion 7 of the safety device 6 for the shutter according to Embodiment II includes a pair of strip-shaped slat-like members 1.
2 and 13.

One slat-like member 12 of each slat-like member is connected to the lowermost edge 2a of the shutter curtain 2 so as to be substantially integrated. Further, the other slat-like member 13 has a rising portion 5 b formed integrally with the seat plate 5.
Also serves as.

The slat-like members 12, 13 are
They are connected to each other so that they can overlap each other and slide up and down.

As a specific connection structure, as shown in FIG. 4, at the left and right ends of the other slat-like member 13,
Guide slits 14 having a vertical direction as a longitudinal direction are respectively formed, and sliding pins 15 are protruded from left and right ends of the lower edge side of one of the slat-like members 12 corresponding to the guide slits 14. The sliding pin 15 is attached to the guide slit 14 so that the sliding pin 15 cannot be pulled out.

Then, the other slat-like member 13 overlaps with one slat member 12 on the indoor side of the shutter curtain 2 and makes the sliding pin 15 slidable in the guide slit 14. It is suspended by the shutter curtain 2 so that it can move up and down.

The micro switch 11 as a detecting means is provided on the indoor side horizontal portion 5a of the seat plate 5 as in the first embodiment, and the switch lever 11a
As shown in FIG. 4, they face the respective slat-like members 12, 13, and are disposed along the guide slit 14 with the tips contacting the lower edges of the guide slits 14. As shown in (1), the switch is turned on by being pressed by the head 15a of the slide pin 15 that slides in the guide slit 14. The switch 11 bends the shape of the switch lever 11a on the base end side so as to perform a detection operation at an early stage of the relative operation of the shutter curtain 2 with respect to the seat plate 5,
As shown in FIG. 4, the sliding pin 15 is formed close to the head 15a.

The length L of the guide slit 14 in the up-down direction is the rising distance (stroke) of the buffer portion 7 and is the rising distance of the seat plate 5 relative to the lowermost edge 2a of the shutter curtain 2. . The ascending distance is the time from when the seat plate 5 abuts on the obstacle X when the shutter curtain 2 descends and the switch 11 is actuated to detect this, and until the shutter curtain 2 completely stops descending. The length is set so that the shutter curtain 2 can be lowered.

According to the configuration of the embodiment II, when the seat plate 5 comes into contact with the obstacle X when the shutter curtain 2 is lowered, the slat-shaped members 12 and 13 face each other. The sliding movement causes the seat plate 5 to rise with respect to the slat curtain 2, thereby immediately
With the head 15a of the sliding pin 15 rising, the switch lever 1
1a is pressed, the switch is turned on, and an obstacle detection signal is given to the control system of the electric motor for raising and lowering the shutter curtain via the transmitter, and the electric motor is stopped, and the descent of the shutter curtain 2 is stopped.

Therefore, the safety device 6 for the shutter according to the second embodiment employs a mechanical device from the detection of the obstacle X by the switch 11 to the stop of the lowering of the shutter curtain 2 as in the first embodiment. Structural loss time,
Even if the shutter curtain 2 continues to descend, the load of the seat plate 5 may be applied to the obstacle X within the range of the stroke L as shown in FIGS. Is not applied to the obstacle X. Accordingly, the safety of the shutter can be ensured within a range that does not cause damage to the obstacle X or injury to the human body.

Further, according to this configuration, the connection state between the shutter curtain 2 and the seat plate 5 is configured to have the same appearance as that of a normal shutter curtain without the safety device 6, and the design may be impaired. Absent.

The buffer portion 7 of the second embodiment is provided with the guide slit 1 on the other slat member 13 on the side of the seat plate 5.
4 is provided so as to be slidable with respect to one slat-shaped member 12. However, a guide slit 14 is provided in one slat-shaped member 12 and the other slat-shaped member 13 on the side of the seat plate 5 is provided. The slide pins 15 may be provided so that they can slide relative to each other. In this case, the switch lever 11a of the switch 11 may be configured to detect the lower edge of one slat-shaped member 12 that moves down with respect to the other slat-shaped member 13.

Further, as shown in FIGS. 6 and 7, the structure of the buffer section 7 formed by the pair of slat-like members 12 and 13 employed in the above-described Embodiment II is a conventional shutter device having an obstacle detecting mechanism. Can be adopted for the connection structure between the shutter curtain 2 and the seat plate 5. That is, the dish-shaped seat plate 5 is hung on a frame 17 equipped with a contact-type electric switch 16 to constitute an obstacle detection mechanism 11 serving as a detection means. The slat-shaped member 13 is provided integrally, and constitutes the same buffer portion 7 as described above.

When the seat plate 5 comes into contact with the obstacle X when the shutter curtain 2 descends, the switch 16 is turned on by the rise of the seat plate 5 with respect to the frame 17, and this operation signal causes the shutter curtain 2 to move. Stop descent. In this example, similarly to the above, within the range of the stroke L,
Although the load of the frame 17 and the seat plate 5 is applied to the obstacle X, the load of the shutter curtain 2 is not applied to the obstacle X.

Embodiment III Next, Embodiment III of the shutter safety device of the present invention.
Will be described. In Embodiment III, the same or equivalent parts as those in Embodiments I and II described above are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, a buffer portion 7 of the shutter safety device 6 according to Embodiment III is provided on the lowermost edge 2a of the shutter curtain 2 so as to be formed integrally with the lowermost edge 2a. It is composed of a plate-shaped hanging portion 2b and a hollow box-shaped member 18 having a substantially rectangular cross section and suspended by the hanging portion 2b.

The box-shaped member 18 of the buffer 7 is attached so as to grip the horizontal suspension 2b from below.
The slit hole 18a formed on the upper surface of the box-shaped member 18 is slid so that the lower edge portion of the shutter curtain 2 advances and retreats, and can be moved up and down with respect to the slat curtain 2.

The seat plate 5 also serves as the bottom surface of the box-shaped member 18 and is provided with a reinforcing rib inside thereof, and a drain hole 5c is formed in the center of the seat plate 5. Intrusion of rainwater or the like from the outdoor side through the slit hole 18a does not stay.

In this Embodiment III, the switch 11 of the detecting means is provided on the upper surface of the box-shaped member 18 on the indoor side, and is configured such that the switch lever 11a extends into the box-shaped member 18. , A push-off type switch.

That is, when the normal shutter curtain 2 is moved up and down, the hanging portion 2b is in a hanging state in contact with the upper inner surface of the box-shaped member 18 (see FIG. 8).
The suspending portion 2b is in a state where the switch lever 11a of the switch 11 is pressed, and in this state, the electric motor that drives the shutter curtain 2 up and down is not stopped.

The rising distance L of the buffer 7 in the above structure is the moving distance of the hanging portion 2b in the box-shaped member 18, and this moving distance is the same as in the above-described Embodiments I and II. The length is set according to the time from when the switch 11 detects the obstacle X to when the shutter curtain 2 completely stops.

According to the configuration of Embodiment III, when the seat plate 5 comes into contact with the obstacle X when the shutter curtain 2 is lowered, the box-shaped member 18 integral with the seat plate 5 is moved to the hanging portion. 2
By moving upward with respect to b, the seat plate 5 rises with respect to the slat curtain 2, and as a result, immediately,
The switch lever 11a is protruded by the hanging portion 2b detached from the upper inner surface of the box-shaped member 18, is turned on, and gives an obstacle detection signal to the control system of the electric motor for raising and lowering the shutter curtain via the transmitter, The electric motor is stopped, and the descent of the shutter curtain 2 is stopped.

Therefore, according to the shutter safety device 6 of the third embodiment, similarly to the first and second embodiments, the descent of the shutter curtain 2 is stopped after the obstacle X is detected by the switch 11. Even if the shutter curtain 2 continues to descend for a mechanical structural loss time, the load of the seat plate 5 is applied to the obstacle X within the range of the stroke L, as shown in FIGS. However, the load of the shutter curtain 2 itself is not applied to the obstacle X. Therefore, it is possible to ensure the safety of the shutter within a range that does not damage the obstacle X or damage the human body.

[0051]

As described above, in the shutter safety device of the present invention, the buffer portion having a predetermined rising distance is provided at the connection portion between the lowermost edge of the shutter curtain and the seat plate. If there is an obstacle below this shutter curtain during the descent operation, after the seat plate abuts on this obstacle, that is, from when the detecting means detects this obstacle, until the shutter curtain stops completely The time lag that occurs due to mechanical structural causes of
This buffer has an effect that the load applied to the obstacle can be limited to only the seat plate portion.

Therefore, since the weight of the shutter curtain is not applied to the obstacle, it is possible to prevent the obstacle from being damaged or the human body from being damaged when the obstacle is a human body. Can be obtained.

Further, the detection of the obstacle by the detection means is configured to be an initial stage of the relative operation of the shutter curtain with respect to the seat plate, so that the operation from the detection of the obstacle to the stop of the lowering operation of the shutter curtain is performed. It is possible to provide a sufficient allowance for the rising distance of the buffer portion with respect to the time lag, and it is possible to set and configure the rising distance to a minimum, so that the effect of not deteriorating the design of the appearance is obtained. is there.

In particular, according to the safety device according to the fifth aspect of the present invention, each frame in the buffer portion is nested into each frame and retracts. There is an effect that a time lag from when the shutter curtain abuts to when the shutter curtain completely stops can be absorbed.

According to the safety device of the sixth aspect, the same effect as that of the fifth aspect can be obtained, and the slat-like member having a slidably movable connection structure has a simple structure. Therefore, the safety device according to the seventh aspect of the present invention can be easily manufactured, and the safety device according to the seventh aspect has a simple structure including only the hollow box-shaped member that rises with respect to the lowermost edge of the shutter curtain. This has the effect of being constituted without impairing the design.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing Embodiment I of a shutter safety device of the present invention.

FIG. 2 is a schematic longitudinal sectional side view of the main part.

FIG. 3 is a schematic vertical sectional side view for explaining the function.

FIG. 4 is a schematic longitudinal sectional side view showing Embodiment II of the present invention.

FIG. 5 is a schematic vertical sectional side view for explaining the function.

FIG. 6 is a schematic longitudinal side view in which Embodiment II of the present invention is applied to a conventional mechanism.

FIG. 7 is a schematic longitudinal sectional side view for explaining the function.

FIG. 8 is a schematic longitudinal sectional side view showing Embodiment III of the present invention.

FIG. 9 is a schematic longitudinal sectional view for explaining the function.

FIG. 10 is a schematic longitudinal sectional side view of a main part of a conventional example.

FIG. 11 is a schematic vertical sectional side view for explaining the function.

[Explanation of symbols]

 2 Shutter curtain 2a Lowermost edge 5 Seat plate 6 Safety device 7 Buffer unit 8a, 8b, 8c Frame 11 Detection means (switch) 12, 13 Slat-shaped member 18 Box-shaped member L Climbing distance (stroke) X: Obstacle

Claims (7)

(57) [Claims] 1. A cushioning portion connected to a lowermost edge of a shutter curtain and a seat plate, wherein the buffering portion has a predetermined rising distance with respect to a lowermost edge of the shutter curtain,
By the seat plate the buffer unit, cheap electric shutters increase has become possible for the shutter curtain
In all the devices, the predetermined rising distance of the buffer section is determined by the shutter curtain.
When the seat descends, at least the seat plate touches an obstacle
From the time until the shutter curtain stops.
A shutter descent distance corresponding to said shutter curtain . 2. The shutter safety device according to claim 1, wherein the shock-absorbing portion has a margin for the shutter curtain to descend with respect to the seat plate after the seat plate contacts an obstacle. 3. A shutter connected to the lowermost edge of the shutter curtain and a seat plate, wherein the buffer has a predetermined rising distance with respect to the lowermost edge of the shutter curtain,
The seat plate can be raised with respect to the shutter curtain by the buffer portion, and when the seat plate contacts an obstacle when the shutter curtain is lowered, the shutter curtain in the buffer portion is Electric powered with detection means for detecting the rise of the seat plate with respect to the lowermost edge
In the safety device for a shutter, the predetermined rising distance of the buffer unit is at least the detecting means.
After the step detects the rise of the seat plate, the shutter curtain
Shutter shutter corresponding to the time until the shutter stops
The safety device for the shutter, characterized in that it is the descent distance of the shutter. 4. The shutter safety device according to claim 3 , wherein said detecting means performs a detecting operation at an early stage of a relative operation of said shutter curtain with respect to said seat plate. 5. The buffer according to claim 1, wherein the cushioning section comprises a nested frame having a plurality of suspended frames, and the seat plate is mounted on a lowermost frame. , 3 or 4
A safety device for a shutter according to claim 1. 6. The slat-like member, wherein the buffering portion is formed of a slat-like member which overlaps in a front-to-back direction and is slidably connected to each other in a vertical direction. Or the safety device for a shutter according to 4 . 7. The shutter according to claim 1, wherein the buffering portion is formed of a hollow box-shaped member that grips a lowermost edge of the shutter curtain and is suspended from the lowermost edge. 5. The safety device for a shutter according to claim 3, 3 or 4 .