JPS5857598B2 - quick shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to provide a quick shutter with a simple structure and low cost, which can quickly open and close the shutter using a small power source.

For example, in factories with heating and cooling systems, shutters at entrances and exits are opened and closed at high speeds to minimize heat loss due to outflow of cold and warm air when vehicles and workers enter and exit. However, when the shutter is driven at high speed, if the reduction ratio of the power source such as a motor is set small, a high output power source is required, which poses a problem in that equipment costs and operating costs are high.

For this reason, as shown in Japanese Patent Publication No. 50-35340, the shutter is divided into upper and lower stages, and the lower shutter is raised and lowered at high speed relative to the upper shutter using a boost mechanism. is proposed.

However, in this prior art, each shutter is suspended from a dedicated chain 7 connected to a balance weight, and all the shutters are raised and lowered by simultaneously driving the chains. Since a boosting mechanism is constructed by reversing the tensioning direction of these chains vertically between them, the length of these chains spanning the balance weight and each shutter becomes long, and the length of these chains is long. Since a large number of Suge rockets are required for tensioning, the structure has the disadvantage of becoming complicated due to an increase in the number of parts and the chain length, and an increase in manufacturing costs.

The present invention solves this problem by using a double speed mechanism that uses the lifting force of the upper shutter to raise and lower the lower shutter at double speed. By combining the two, a protection mechanism is provided which can effectively prevent the shutter from falling due to impact with a simple mechanism.

Hereinafter, the details of the present invention will be explained based on the drawings. Figures 1 to 3 illustrate a quick shutter according to the present invention, which is lined up in front of an existing shutter 4 at the entrance/exit of a factory or the like that is heated or cooled. It is set up.

That is, 33 is a gate-shaped frame surrounding the entrance and exit, and within this gate-shaped frame 33, the shutter IA is divided into upper and lower stages (three stages in the drawing) of the IF-1.

The IB and IC are built in such a way that they can be raised and lowered freely, and the shutter I that has been raised to the end of the lift stroke is mounted on the same gate-shaped frame 33.
A, 1B, A fixed cover 2 is attached to cover the front surface of the IC, and a walkway 3 for inspection is provided on the front surface of the fixed cover 2.

The upper and middle shutters 1A and 1B are constructed by connecting a plurality of shutter units in the left and right direction, each consisting of a steel frame 5 and a steel plate 6 attached to it. Consideration has been given to making it possible to attach and detach the shutter bolts (-).

1 is a transparent acrylic plate attached to the window provided in the middle shutter 1B.

The lower shutter 1C has a frame 8 made of a lightweight metal material such as an aluminum tube, and a polyester sheet 9 in a highly visible color such as orange is attached to the frame 8, and the lower edge is elastically adhered to the floor surface. A rubber plate 10 is attached to ensure airtightness and at the same time provide a cushioning effect.

Further, the upper horizontal frame 33 of the gate-shaped frame 33
Sprockets) 13, 13 are mounted on both the left and right ends of a, and one end of the chain with ends ii, ii wound around these,
It is fixed to the top of both left and right ends of the upper shutter 1A via a falling IE mechanism 32, which will be described later,
The rotational force of the forward/reverse motor M is fixed to the balance weights w and w installed in the hard side frame 33b of No. 3, and is equipped with a speed reducer and a brake. (sprocket) 13.13.

In this case, the rotational directions of the sprockets 13 and 13 are opposite to each other, and this rotational force causes the end chains 11 and 1 to
1, the upper shutter is driven up and down by one person.

Reference numeral 14 denotes a manual endless chain that rotates the transmission chains 12, 12' by manual operation in the event of a failure of the motor M or a power outage.

15... are sonic detectors (radar detectors may be used) arranged several times on both sides of the shutters IA, IB, and IC, 16... are photoelectric switches, and the sonic detectors 15... -Or, when the photoelectric switch 16 detects a vehicle entering or exiting, the motor M is operated in the shutter closing direction after a time set by a timer has elapsed.

Further, when all of the sonic detectors 15, . . . and photoelectric switches 16, .

The respective shutters IA, IB, and IC are double speed mechanisms A and B.
They are connected to each other in an interlocking manner, and by driving one upper shutter up and down, the middle shutter 1B moves up and down at twice the speed, and the lower shutter 1C moves up and down at three times the speed.

The speed doubler mechanisms A and B apply the principle of a pulley and have the following specific structure.

That is, as shown in FIGS. 4 to 6, a wheel body 1 such as a sprocket that can freely rotate to the left and right at the upper end of one upper shutter.
? One end of the element body 18A, such as a chain, wound around the wheel body 17A is connected to the lower end of the fixed cover 2, and the other end is connected to the upper end of the middle shutter 1B. A similar wheel 17 is also located at the upper end of the shutter 1B.
B is provided, and one end of the blank body 18B wound around this wheel 17B is connected to the lower end of one of the upper shutters, and the other end is connected to the upper end of the lower shutter 1C.

Therefore, when one upper-stage shutter is driven up and down at a speed of 13 m/min, for example, the upper-stage shutter pushes up the element body 18A wound around it by the wheel 17A, and therefore In FIG. 5, the body 18A is lowered on the left side with the wheel 17A in between, and raised on the right side, and moved relative to the wheel 17A by a distance twice the amount of movement of the upper shutter 1A. Because it is traveling, the middle shutter 1B rises at twice the speed of the upper shutter, that is, 26 m/min, and for the same reason, the lower shutter 1C rises at a speed of 39 m/min.

As shown in FIG. 5, one end of each element body 18A, 18B has a length adjustment pole 19A at the lower end of the fixed cover 2 and the lower end of the upper shutter 1A, respectively.

19B.

One end of the chain 11 is pivotally connected to a turnbuckle 20 for length adjustment and a bracket 21 fixed on the upper shutter 1A with a pin 22, as shown in FIG. It is connected to the upper shutter 1A via the swing link 23, and the end chain 11...
When the lock is broken, the swing link 23 rotates around the pin 22 by the force of the spring 24, and one end (serrated portion 23') of the link 23 bites into the guide rail 25A that guides the upper shutter 1A up and down. So, shutter IA, IB.

It is designed to prevent 1C from falling.

In other words, a fall prevention mechanism 32 is configured.

Incidentally, even if the chain 18A breaks, a similar fall prevention mechanism provided at both ends of the upper part of the shutter 1B prevents it from falling.

Pl and P2 are stoppers that define the swinging range of the swinging link 23.

26A..., 26B..., 26C... are each shutter IA.

The guide rail 2 is a rubber roller pivotally supported on both the left and right ends of the IB and IC, and is provided on the rigid side frame 31b.
5A..., 25B..., 25C..., each shutter IA by rolling on the inner surface of the groove.

It is designed to hold the IB and IC steady.

27... are guide rails 25A..., 25B...
It is a stopper provided at a predetermined position, and is in contact with the projections 28 provided at the lower ends of both left and right ends of the upper shutter IA, and the projections (not shown) provided at the lower ends of both left and right ends of the middle shutter 1B. 1 is made of rubber so as to provide a cushioning effect when the object is hit. 29 in FIG. 5 is the element body 18B.
This is a protective cover made of steel or aluminum molded product with a C-shaped cross section to hide the road and ensure safety, and is fixed to the upper portions of both left and right ends of the lower shutter 1C.

30 is a rubber cylinder interposed between the frame 8 and the polyester sheet 9, etc.

The quick shutter with the above configuration has a sonic detector 15...
When detects a vehicle, etc., the motor M operates in a predetermined direction to raise the upper shutter 1A, and in conjunction with this, the middle shutter 1B raises twice as fast and the lower shutter 1C goes up three times as fast. etc., passes through the photoelectric switch 16...
When detected by the sonic detector 15..., the motor M operates in the opposite direction to lower the upper shutter 1A, and in conjunction with this, the middle shutter 1B doubles and the lower shutter IC triples. It descends at speed.

Incidentally, the power source of the quick shutter according to the present invention can also be used as the power source of the existing shutter 4, and in that case, a switching device (clutch) is provided.

As described above, the present invention provides the ring body 1 of the uppermost shutter 1A.
One end of the element body 18A wound around 7A is attached to a gate-shaped frame 33.
At the same time, the other end is fixed to the lower shutter 1B, and one end of the element body 18B wound around the wheel 17B of the lower shutter 1B is fixed to the uppermost shutter 1A, and the other end is fixed to the uppermost shutter 1A. Next, the double speed mechanisms A and B are fixed to the lower shutter 1C, respectively, and the lower shutter is raised and lowered at double speed using the lifting force of the upper shutter, so the double speed mechanism The cable bodies 18A and 18B in A and B are the portal frame 31 and the upper shutter 1.
B. The length connecting one top shutter and the next lower shutter 1C is sufficient, and the number of wheels 13, 17A, and 17B used can be reduced, which reduces the number of parts and the length of the element body used, simplifying the structure. It is possible to reduce the manufacturing cost.

Furthermore, if the element body 11 is cut due to an unexpected cause and the tension is no longer applied to the swing link 23, the spring 24 will act instantly and the link 23 will bite into the lifting guide rail 25A, causing the link 23 to bite into the lifting guide rail 25A. To prevent the upper shutter 1A from falling due to impact.

Moreover, at this time, since the lower shutters IB and IC are connected to the top shutter person via the aforementioned double speed mechanisms A and B, the lower shutter shutters are linked to prevent the top shutter person from falling. The shutter IB and IC are also prevented from falling.

Therefore, by utilizing the double speed mechanisms A and B, all the shutters IA and IB are operated by a single fall prevention mechanism 32.

1C can be prevented from falling, and the protective device can be simplified.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the quick shutter, with the right half showing the shutter in the ascending position and the left half showing the shutter in the descending attitude, and FIG. 2 a plan view thereof. , Fig. 3 is a longitudinal side view, Fig. 4 is an enlarged front view showing the structure around the end of the top shutter, Fig. 5 is an enlarged longitudinal side view showing the double speed mechanism, and Fig. 6 is the elevation guide mechanism. FIG. IA, IB, IC...Shutter 13.17A. 17B...Circle, 18A, 18B...Flicate, 23
... Swing link, 24... Spring, 25A...
・JJt guide rail 32... Fall prevention mechanism, 33
... Gate-shaped frame, A, B... Double speed mechanism, M...
Drive means (forward/reverse motor), W...balance weight.

Claims (1)

[Scope of Claims] 1. A gate-shaped frame surrounding an entrance is equipped with shutters divided into upper and lower stages, and each shutter is connected to each other by a double-speed mechanism to move up and down. Rotational force in forward and reverse directions is input to the upper end of the frame 33. A wheel body 13 connected to a driving means M is mounted on a shaft, and the wheel body 1
One end of the element body 11 wound around the uppermost shutter 1
A is fixed to A through a fall prevention mechanism 32, and a balance weight W is suspended from the other end, and the lowest shutter 10
The other shutters IA and IB are equipped with wheels 17A and 17B at their upper ends, respectively, and one end of the element body 18A wound around the wheel 17A of one of the top shutters is attached to a gate-shaped frame. 33 side, and the other end is attached to the lower shutter 1
One end of the blank body 18B fixed to B and wound around the wheel 17B of the lower shutter 1B is fixed to the uppermost shutter 1A, and the other end is fixed to the next lower shutter 1C, thereby forming a double speed mechanism. A and B, and the fall prevention mechanism 32 is a swinging link that is biased to rotate freely by being bitten by a spring 24 into the lifting guide rail 25A on the gate-shaped frame 33 side of the uppermost shutter 1A. 23, and the cord-like body 11
A quick shutter characterized in that by connecting an end of the link 23 to the link 23, the link 23 is constantly pulled and held in a direction opposite to the urging direction by the shutter's own weight.